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Vet Point Vest
Breed: mix German Shepherd
Age: 9 years
Anamnesis: the dog and it’s owner are very close to our vet practice, they ask for anual hematology and biochemistry exams, abdominal ultrasounds x-rays just for prevention. In the 19th of September 2018 the owner called beacause her dog was not being herself, she was not eating for 24 h and she thinks the dog is in pain.
Clinical findings: when the dog got to our practice she was lethargic, with pale mucose membranes, tahicardic, dispneic and with an enlarged abodomen.
Blood samples were taken and the results were:
-mild anemia 4130000 mm3
-hemoglobine 9,9 g/dL
-hematocrit 27,2 %
-severe trombocitopenia 52.000 /mm3
-extended clotting time
-TCR >2 sec
-CPK increased 955 U/L
-ASAT 289 U/L
-ALAT 70 U/L
-Ureea 124 mg/dL
We performed and ultrasound and there was free fluid in the abdomen and after the paracentesis we removed aprox. 300 ml of blood from the abdomen. We suspected an abdominal hemorrage.
- Intoxication with anticoagulant raticides
- Internal bleeding: organ hemorrage
After a few hours of i.v fluids (aprox 2000 ml NaCl 0,9%) to reestablish blood volemia we decided to do a laparatomy.
Thoracid X-rays were free for pulmonary metastasis. At the ecocardiography the heart was free of any mass in the right atrium.
Splenomegaly with ruptured spleen was our main concern, we did a splenectomy and removed aprox 4L of free blood from the abdomen. The splenectomy was made with sutures and the attached omentum was removed in bloc. A thorough abdominal lavage was made and the instruments were changed to minimize the risk of metastatic seeding.
A sample of the spleen was sent to the histopathology lab. That night we performed a blood transfusion from a 60 kg Tossa Inu.
The next morning the dog was feeling great, she ate normal, she waig her tail and everything was great.
After too weeks our suspected diagnosis was confirmed: Spleen’s red pulp hiperplasia and splenic haemangiosarcoma. The staging could be: T1 (primary site tumor), N1(regional lymph node involvement: mesenteric lymphadenitis 2 weeks after surgery), N0( no evidence of distant metastatis: clear lungs, heart, liver at ultrasound).
Final diagnosis: Visceral Hemangiosarcoma stage II
I also tested cardiac canine troponin I (a marker with high specificity for cardiac injury) at PraxisLab in Budapest to check for miocardial metastatic modifications but the result was normal ( <0,25) .
Treatment: it has been 2 months since the surgery and splenectomy was the treatment of choice at that time.
She received ONCOSUPORT (RX) and a shot of 3 ml of Theranekron (Tarantula cubensis extract) every 5 days.
We finally found Doxorubicine and we started the treatment with the following protocol:
-Doxorubicine 30 mg/m2 = 16 mg/38 kg every 2 weeks for 5 treatments. It does have a cardiotoxic effect but if the dog lives long enough I will continue as much as I can.
-Maropitant (Cerenia) 1mg/kg 2-3 days after chemotherapy.
Other drugs that can be used with a antiangiogenic effects are : Masivet, Thalidomide, Palladia.
The prognosis with dogs with haemangiosarcoma treated with splenectomy only is really poor, 2-3 months surviving time after surgery. Even with chemiotherapy the surviving time of 12 months is only 10%. Median survival time with spelectomy and doxorubicine is 132 days.
Indolent corneal ulcer
Faculty of Veterinary Medicine Bucharest
The fluorescein test is very important in diagnosis of corneal diseases. Is our best friend that accurately describes the size and the depth of the corneal lesions. If the fluorescein test is positive exclude primarily a foreign body (from the conjunctival fornix or from the internal surface of the third eyelid) and then examine using the loupe, the edges of corneal lesion. If is an area of loose of the epithelium at the periphery of the lesion, looking like an “opened book (Figure 1, Figure 2 and Figure 5) your patient has indolent corneal ulcer.
The first step in the treatment of indolent corneal ulcer is the debridement of the denude epithelium using a cotton-tipped applicators (Figure 2), scalpel blade or Alger Brush® (Figure 3). Local anesthesia of the cornea using Benoxi® will allow you to perform debridement.
Using cotton-tipped applicators, the loose epithelium is removed using gentle lateral and circular movements. Debridement using a surgical blade is easily performed doing lateral movements, holding the blade’s sharpen edge perpendicular on the corneal surface.
The burr of the Alger Brush® device is faced towards the edges of the corneal ulcer and debridement is performed in a circular movement, following the limit between the ulcer and the healthy cornea. The small burr of the device quickly removes the epithelium so that the surgeon’s hand is laid on the periorbital area for support, to avoid accidents. Throughout debridement the corneal surface is flushed continuously using saline.
After performing the debridement of the indolent ulcer, the lesion is significantly bigger than the initial one (Figure 6), and in some cases, the anterior epithelium is completely removed.
The fluorescein test is used to reveal the size of the lesion after debridement in order to choose a therapeutic approach:
- medical treatment – corneal healer eye drops and gels
- therapeutic contact lens and eye drops (Figure 7)
- VetShield® colagen contact lens and tarsorrhaphy
- only tarsorrhaphy
Indolent corneal ulcer after debridement can be healed ad integrum (Figure 8) in 5-10 days or, in some cases, we need to perform many debridements. That’s why rechecks should be performed each 5 days after debridement and fluorescein test and reexamination with the loupe is mandatory.
Surgical removal of the luxated lens including the capsule (intracapsular lens extraction) in a bear
Veterinary Clinic NOVA
Violeta is a 37y.old brown bear form Belitsa Dancing bears park, Bulgaria.
She was suddenly blinded and had an urgent eye check.The ophthalmological examination revealed increased pressure (40mmHg) and displaced lens in the left eye.The cornea was mildly opaque and the lens was with senile cataract. No PLR. The retina was also degenerated resulting in marked tapetal hyper reflexivity.
Lens subluxation (posterior) is partial detachment of the lens form the ciliary body, due to breakdown or weakness of the zonules.
We preformed surgical removal of the luxated lens including the capsule (intracapsular lens extraction).
Hydrodissection was employed for the removal of lens. We left the eye without artificial lens (aphakic).
During the removal of the lens, prolapsed vitreous was determined and we removed it with scissors in the anterior chamber.
Following the irrigation of the anterior chamber, corneal incisions were closed by separate sutures using 8/0 polyglactine.
7 days after surgery, the eye is calm; there is no secretion or swelling.
Now the bear is in preparation for hibernation and her eye will be examined in the spring.
DR LUCIAN FODOR HAPPY PET TIMISOARA-ROMANIA
Osteochondrosarcoma is an uncommon tumor that generally arises from the skulls of dogs (cranium, orbit, zygomatic arch, mandible, and maxilla) and can occasionally arise from the pelvis, ribs, and os penis. These tumors have a characteristic appearance on radiographs, CT, and MRI: generally the borders of the tumor are sharply demarcated with limited lysis of the adjacent bone, with a coarse granular density throughout. A popcorn-like appearance with stippled and heavily calcified or ossified regions has been described on survey radiographs.
Clinical signs are generally based on location and extent of the lesion; ranging from a palpable, fixed, and firm mass to pain on mouth opening for tumors involving the mandible and zygomatic arch, exophthalmos with infraorbital lesions, and neurologic abnormalities for tumors involving the cranium.
Cara, a one year unsterilized mallinois female bitch, from the age of 7 months beggin to develop in the fronto-parietal region a globular formation(fig.1-2-3)
.She came to our unity with neurological manifestations, ataxia, deviation, refusal to rise from the bottom, bilateral midriasis.
Blood analyzes where in optimal parameters. After performing the CT, a giant extra and intra-cerebral form was noticed, being the imaging feature of the osteocondrosarcoma. (Fig.4-5)
After consulting with the owner we decided surgery.
Post operator evolution was good, 48 hours after the surgery the patient was recovered neurologically(Fig11). At six (Fig12)and 12 months post surgery,(Fig.13) Cara feels good, fully recovered.
In plastic and reconstructive surgery flaps have an important place not only for the aesthetic results obtained but also because they can be used to cover an area without producing tension. The flap mechanism mainly consists of moving a piece of skin from the donor site and moving it to the recipient site (primary defect). The rhomboid flap have a big versatility because can be done anywhere on the surface of the body. Filling small and large wounds with tissue similar in texture, colour and thickness is the ideal objective of the flap. This article describes the surgical approach of two cases, one with an abscess and the other with a benign tumor located at the cutaneous level, both of which are approached by the use of the rhombic flap.
A skin flap represent a partial detachment of a piece of skin and the adjacent subcutaneous tissue with its vascular supply intact. All skin flaps have a pivot point or base. Survival of the skin flap is made by blood circulation through its base during the procedure. From this point of view, it is important that the base of the flap be large enough to prevent necrosis.
Local flaps are based on two types of vascularization: the subdermal plexus or a vein and an artery (figure A; right side- island flap).
The rhombic flap was invented by a human maxilofacila surgeon called Limberg Alexander Aleksandrovich in 1946. By name, the flap has rhomboid shape with two angles of 120 degrees and two angles of 60 degrees. Depending on the primary defect / lesion pattern which require coverage, the flap angles may change. It is often used in reconstructive surgery of the face in humans: eyelid, floor of nose, alar rim and chin defects with good cosmetic results. This skin flap also called Limberg flap is a transposition flap – the elevated skin will have both advancement and rotation movement when is applied over the primary defect.
How to design the rhombic flap
Whether it is a wound or a tumor, around a defect is drawn a diamond with angles of 120 degrees and 60 degrees as mentioned above. First, the short diagonal that joins the 120 degree angles (BD) must be measured and then extended in the desired direction. The extension (DE) to the outside must have the same length with the short diagonal (BD) and with the sides of the diamond. The next step is to extend another line wich is equal and parallel with the closest side of the diamond (EF). Finally the skin flap is obtained (ADEF).
The surgical defect created can be covered with the rhomboid flap from 4 sides (Picture 4).
Daisy, a six years old female cat of the Maine Coon breed presented with a sebaceous cyst, 2 cm diameter, round shape, locatad on the dorsal lombo-sacral area. The owner says that the cat have a decreased appetite. The pacient was rescued and adopted and was vaccinated just when was young. The cat lives with another 3 cats in the same house, all with the same vaccination status.
At clinical examination, apart from the wound, dehydration 6% and a small buccal ulcer behind the last molar on the right mandible were detected. The patient was initially treated with clindamycin and meloxicam for 7 days but no improvement observed. The cyst was infected, with bad smell, partially covered with agglutinated hair and inside soft tissue necrosis was present.
After inspection, dead space was noticed under the skin around the wound. One day before the surgery we noticed fever (40,1°C) and dehydration 8%. CBC, serum biochemistry and FeLV/FIV test were performed. Neutropenia (0.15 x 109/L, normal range: 1.48 – 10.29) and hyperglobulinemia (57g/L, normal range: 28-51) and decreased ALKP (<10 U/L, normal range: 14-111). IDEXX Snap FeLV/FIV was negative. The cat was hospitalized 24 hours for fluid therapy and i.v. antibiotic (Cefuroxime-Zinacef). After stabilizing the patient the intervention was performed.
Descripting the surgical steps
The area was clipped and clorhexidine was used for local antisepsis. Sterile marker was used to draw the rhombic shape around the primary defect.
Due to the presence of dead spaces under the skin, the round shape of the primary defect was converted to a rhomboid and the rhombic lines were positioned about 1 cm from the wound margin. In this way the tissue that was not healthy was removed. Identifying the area with the highest laxity is the next step. This was done by pinching the skin around the primary defect. After choosing the appropriate area, the flap that must be transferred was drawn.
The first side of the flap (the extended line outward of the defect) and the second side of the flap (line that is the same length as the first, to the adjacent side of the defect and makes an angle of 60 degrees at the flap apex) were cut and the flap was elevated after undermining
Skin cuts were made perpendicular with No.10 scalpel blade and and the flap was mobilized with help of Metzenbaum scissors. The surrounding tissues are widely undermined to avoid any tension and the flap is rotated into the recipient site. After rotation, the flap is locked in place by fixing its corners by subcutaneous sutures. The donor site is closed as the flap moves over into the new location. Finally the skin was closed with 4/0 PDX in simple interrupted suture pattern.
A common unaesthetic appearance after transposed flap was the “dog ears” at the pivot point. In this situation, dog ear was corrected by excising one triangle along one side of its base.
Coco, a mix breed male dog, three years old was brought to the clinic because a lump was identified on the skin. Owner reports that the mass was seen some days ago and does not believe it has increased significantly. Also says it makes itching and that the dog often scratch there and bleeds. This was the owner’s only concern.
No abnormalities were detected after clinical examination except the lump. With a cauliflower aspect, the lump had a small base of implantation and 1,2/1,4 cm in diameter. After palpation of the skin around, no pain or local temperature were identified. FNA and blood tests were recommended before surgery and histopathological examination after. The owner declined for financial reasons the FNA and blood test but accepted the histopathological examination. In this situation, a two centimeter safety margin clearance was decided.
Surgical steps along with flap drawing were described above except for asepsis. In this case iodine povidone was used.
Description: Cutaneous/ subcutaneous mass composed of chistic masses well delimited by a cheratinized multilayered epithelium with epithelial cells with squamous differentiation oxifiles, mixed with abundant, granular and amorphous keratin; multifocal with the tendency of confluence, inflammatory infiltration with neutrophils, macrophages and epithelial cells is observed. Malignant neoplastic cells are not present in the examined sections.
Interpretation: Benign follicular tumor – pilomatrixoma with associated granulomatous inflammatory process.
Common complication of the flap
- Flap necrosis;
- Secondary infection.
Short indications for proper surgical procedure
- The sides of the rhomboid must have the same length;
- The sides of the flap must must have the same length;
- Depending on the shape of the primary lesion, the diamond angles may vary in degrees;
- Any defect in rhombic shape shows 4 variants in which it can be covered.
- The lowest laxity region should be chosen and as far as possible so as not to alter anatomical plans.
Alternative anesthesia protocols without use of the neuromuscular block for phacoemulsification in dogs and cats
Correspondence: Stroe Marina-Stefania, DVM, Marina-Stefania.Stroe-Giurca@uliege.be
Cataracts may occur at any age and in any location in the lens. Cataracts can block tapetal reflection and fundic examination partially or completely and are often classified by stage of maturation and cause.
Cataract surgery are facilitated by a central position of the eye ball within the palpebral fissure. A centrally positioned eye is normally achieved by using of neuromuscular blocking agents (NMBAs). NMBAs also decrease the ocular muscle tone and that is very useful because an increased tonus may cause ocular structures to become displaced and distorted and can also influence IOP. Use of these agents necessitates intermittent positive pressure ventilation (IPPV).
Objective: Offering alternatives for anesthesia to perform cataract surgery in dogs and cats without using the neuromuscular block.
The safety of anesthetic protocols consisting of midazolam, tramadol, lidocaine, propofol, fentanyl, ketamine, isoflurane without using the neuromuscular block was studied in 16 cataract surgeries in dogs and cats. The protocol’s safety was expressed by monitoring heart rate, oxygen saturation and pulse rate using pulse oximetry, respiratory rate, end-tidal carbon dioxide provided by capnography, arterial blood pressure using oscillometric method. Assessments were made for quality of induction, maintenance and recovery from anesthesia.
Animals: Sixteen animals, eleven dogs and five cats, all client-owned.
Methods: All animals were examined prior to premedication, were performed blood tests hemoleucogram and biochemistry and monitored during induction, surgery and recovery. Blood samples were analyzed for standard biochemistry panel including glucose, creatinine, ureea, hepatic transaminases and hemoleucogram. Before anesthesia, HR was measured using cardiac auscultation and MAP was measured using automated oscillometry, respectively. Protocols consisting of midazolam, tramadol, or lidocaine iv was performed. IV propofol was administered to abolish the palpebral reflex, produce jaw relaxation and facilitate ETI. Topical ocular administration of oxybuprocaine (Benoxicaine®) 0.4% drops to anesthetize cornea was performed before general anesthesia. All patients received topically sprayed laryngeal 2% lidocaine. The cough response at ETI was recorded.
After intubation, auscultation of heart and lung sounds was possible by means of an oesophageal stethoscope. Pulse oximetry was used to monitor oxygen saturation of hemoglobin in arterial blood and pulse rate. The patient was connected to the inhalational anesthesia machine. The maintenance of anesthesia was achieved using isoflurane like inhalant agent and fentanyl or mixture of fentanyl, lidocaine and ketamine. Respiratory rate and end-tidal carbon dioxide was provided by capnography. Assessments were made for quality of induction, maintenance and recovery from anesthesia by evaluation of the animal’s eye position, jaw tone, heart and respiratory rates and autonomic responses to surgical stimulation.
Results: The purpose of this work was to perform anesthesia protocols without use of the neuromuscular block for phacoemulsification in dogs and cats and make preliminary investigation into safety for patient and to record the advantages and disadvantages. Cataract surgery are facilitated by a central position of the globe within the palpebral fissure. A centrally positioned eye is normally achieved by using neuromuscular blocking agents (NMBAs). NMBAs also decrease the ocular muscle tone and that is very useful because an increased tonus may cause ocular structures to become displaced and distorted and can also influence IOP. But if there is no possibility of using NMBAs solutions must be found.
Conclusion: The aim of the project was to test several variants of anesthetic protocols to compare the various effects of molecules including lidocaine, ketamine, fentanyl, tramadol, propofol, isoflurane have on the organism.
The use of anesthetic drugs without using of neuromuscular block for cataract surgery may be challenging bringing both advantages and disadvantages. The recovery period after a classic anesthesia without neuromuscular block probably is much shorter than that achieved after a curarisation and the probability for hypotension is less likely. On the other hand, without neuromuscular blocking agents we can`t obtain the central position of the eye globe and that implicate make some compromises for the surgery.
Keywords: cataract, anesthesia, phacoemulsification, cat, dog,
Patients with ophthalmic disease, such as cataract, vary from young, healthy animals with congenital cataract to geriatric patients, which may have significant diseases like diabetus mellitus. When planning anesthesia for cataract surgery is important to consider the general health status because there are many patients with concurrent disease and that may present significant challenges for the anesthetist . It required investigations before anesthesia like blood tests and if there are changes ideally their condition should be stabilized before anesthesia. Also need to consider that animals that are blind are more likely to be stressed and fearful compared with patients that have vision, especially if the onset of blindness was acute .
A complete ophthalmic examination should be performed and should include examination of PLR and menace response, Schirmmer tear test, fluorescein stain test, intraocular pressure (IOP) and a fundic examination if possible. A complete physical examination is also pertinent, as cataracts may be related to extra-ocular disease.
Electroretinography and ocular ultrasonography are standard pre-operative screening tools to confirm an eye’s candidacy for cataract surgery. Although pre-operative preparation and postoperative management can be intensive, canine cataract surgery is often successful and rewarding. Risks, time commitment, and financial demands of phacoemulsification should be discussed with the pet owner.
Materials and methods
Eleven dogs and five cats presenting to the ophthalmology service with ophtalmological conditions that cause blindness. All patients received the cataract diagnosis after a full ophthalmic examination. Once a cataract forms, surgery is the only treatment method to restore vision. Phacoemulsification uses ultrasonic energy to fragment and extract cataractous lens material from its capsular bag. Exclusion criteria of the patients were concurrent diseases that could not be stabilized before anesthesia. Any pre-existing medical conditions and drugs administered were recorded.
Food and water were withheld from all patients for a minimum of 12 hours prior to surgery
Animals were gently restrained in a sitting or standing position for drug administration and data collection.
Mydriasis is obtained with topical mydriatic agents (Tropicamide) applied with 2-3 hours before intraocular surgery. Also, topical ocular administration of oxybupracaine (Benoxicaine®) 0.4% drops to anesthetized cornea was performed before general anesthesia. Topical local anesthetics are effective because of a direct action on the cornea and minimizing systemic side effects but their use is limited to diagnostic procedures and intra-operatively as they delay corneal healing, are epitheliotoxic and have a short duration of action .
The position of the animals during surgery was in lateral position for unilateral cataract and dorsal for bilateral cataract (Fig.1). HR was measured using cardiac auscultation and MAP was measured using automated oscillometry.
Anesthesia was maintained with isoflurane in a oxygen delivered via a rebreathing anesthetic circuit with the oxygen flow rate set at 60 ml/kg/min and vaporizer setting of 2%. Oxygen saturation as measured by pulse oximetry, pulse rate and respiratory rate were recorded every 5 minutes after anesthetic induction until the end of anesthesia (vaporizer turned off). Pulse quality was established by manual palpation of the femoral artery and respiratory rate was recorded by observation of the capnogram and chest movement.
Measurement of rectal and esophageal temperature was performed by use of 2 thermistor probes. Rectal temperatures were measured at initial hospital intake and after the end of anesthesia. Once each patient had been induced esophageal temperature was measured by placement of an esophageal thermistor probe and was removed at the end of anesthesia.
The premedication has been achieved with lidocaine 2 mg/kg iv or tramadol 2 mg/kg iv (Fig. 2). All the patients received the propofol-midazolam combination for anesthetic induction. The dose utilized for midazolam was 0,4 mg/kg iv.
The use of ketamine was accomplished in combination with lidocaine and fentanyl for dogs and for one cat was used the ketamine-propofol combination. There is significant interest in this combination of propofol and ketamine because has several benefits in the terms of hemodynamic stability, absence of respiratory depression, post-operative analgesia and recovery . The ketamine dose that was used was low at 0,6 mg/kg iv and was mixed in the same syringe with propofol 3 mg/kg.
Steroidal anti-inflammatory drug (Betametazone, Diprophos®) was administered intraconjuctival at the end of the surgery.
In total sixteen animals (eleven dogs and five cats) were enrolled in the project.
All patients were in good condition of general health just 2/11 dogs were stable diabetic patients and for they measurements have been taken to monitoring the blood glucose level before, during and after surgery.
Premedication with lidocaine 2 mg/kg was performed for 6 dogs and was made observation about cough during endotracheal intubation. IV lidocaine can decrease the incidence of cough during endotracheal intubation but does not appear to have a sparing effect on the dose of propofol required for endotracheal intubation.
Two patients receive tramadol 2 mg/kg iv in premedication, one in combination with lidocaine 2 mg/kg iv and the other just the tramadol. For the patient that receive just tramadol was not observed any changes in the propofol dose.
One dog received fentanyl in premedication and after induction was observed significant respiratory depression compared with the others. Two dogs and 6 cats did not receive anything for premedication.
The diabetic protocol for phacoemulsification consist in tramadol 2 mg/kg iv for premedication, induction with midazolam 0,4 mg/kg and propofol at effect. Maintenance of anesthesia has been achieved using isoflurane like inhalant agent and mixture of fentanyl, lidocaine and ketamine. The glucose level was measured before and every hour during anesthesia.
For all patients, cats and dogs, the induction was performed with propofol and midazolam 0,4 mg/kg and topical laryngeal lidocaine was used prior to intubation. One cat received the ketamine-propofol combination for induction.
The cough response at ETI was observed for 3 dogs, the patient that receive tramadol in premedication and the others that was not premedicated and 2 cats. In propofol anaesthetized dogs iv and topical laryngeal lidocaine attenuated the pressor response to ETI where iv lidocaine reduced the cough response.
Duration of the anesthesia from intubation to extubation was 80 min ±10 min depending of the surgical procedure, unilateral/bilateral cataract.
After induction, a rotation of the eyes towards the internal angle was observed. To achieve the phacoemulsification surgery, the eye was brought to the central position by means of the traction sutures.
Cardiovascular and respiratory parameters were well maintained during induction, maintenance and recovery periods for all patients. All patients receive Ringer Lactate infusion at 5 ml/kg/h. The anesthesia was maintained with isoflurane delivered via a rebreathing anesthetic circuit with the oxygen flow rate set at 60 ml/kg/min and vaporizer setting of 2%. This was completed by analgesia offered by combination of fentanyl-lidocaine-ketamine for dogs and fentanyl CRI for cats. The doses utilized for fentanyl was 4 μg/kg/h in combination with lidocaine 2 mg/kg/h and ketamine 0,6 mg/kg/h and when fentanyl was used alone, the dose was between 5-10 μg/kg/h.
Pulse oximetry was used to monitor oxygen saturation of hemoglobin in arterial blood and was maintained at >95%. MAP was measured using automated oscillometry and was stabilized at 80-110 mmHg.
Respiratory rate, end-tidal carbon dioxide was provided by capnography. The respiratory rate was maintained at 10 ± 5 rpm and the level of CO2 was 45-60 mmHg. All patients breathed themselves spontaneously, just one cat need the controlled ventilation because of the elevated level of EtCO2, up to 65 mmHg and the low respiratory rate.
For all patients the recovery from anesthesia was fast and without any complication. The temperature at the end of anesthesia was 37,2 ± 5ºC.
The ideal anesthetic protocol for cataract surgery should provide central position of the eye, decrease the ocular muscle tone, provide analgesia and narcosis for optimal operating conditions, be safe for the patient and comfortable for the surgeon  (Fig. 5).
Good communication with the surgeon before the procedure and an understanding of the surgeon’s requirements are essential when formulating an anesthesia plan. The patient position with the head lower than the heart should also be avoided and at 15 degrees head-up position during intraocular surgery has been recommended in humans.
Also, the position of the animal during surgery may influence the choice of breathing system and endotracheal tube (ETT). Related to intubation should be remembered that the mouth during tracheal intubation can increase IOP as the choroid process of the mandible moves into the orbit. Care must be taken when positioning patients for tracheal intubation, as pressure may be exerted on the globe while the maxilla is held; this is especially the case for brachycephalic breeds. An armored ETT is recommended to use.
The ability to influence IOP is very important part of anesthesia management. Is necessary to avoid increased IOP because in these circumstances may result in a globe rupture, risk for intraocular bleeding or retinal detachment.
The use of ketamine, a dissociative anesthetic, for ophthalmologic procedures is controversial. Ketamine used alone is likely to significantly increase IOP because it causes an increase in extraocular muscle tone . The good benefits of ketamine administration consist in increased of the amount of circulating norepinephrine, increase in peripheral arteriolar resistance and muscle activity and decrease the extent of redistribution hypothermia . The use of ketamine has beneficial effects on the blood pressure, cardiac output, corporal temperature and contributes to realization of a balanced anesthesia based on a multimodal analgesia. On the other hand, ketamine can increase IOP but considering that in the protocols used in this study was never used alone and the fact that the surgical procedure involves making a break through the incision of the cornea and penetrating the eye globe this pressure can be adjusted naturally without becoming hazardous for the structures of the eye.
Is mandatory to avoid coughing, sneezing, vomits when there is a risk of globe rupture because this can result in an increased central venous pressure . Therefore, drugs like morphine that causes vomiting should be avoided. On the other hand, the use of alpha 2 adrenergic agonist is not prohibited; although may induce vomiting especially in cats the alpha 2 adrenergic agonist can be very useful when we are dealing with uncooperative patients and the risk of globe rupture is bigger because of the stress and manipulation. In this study, for avoiding the coughing response was used lidocaine. Both iv and topical laryngeal lidocaine attenuated the pressor response to ETI and iv lidocaine 2 mg/kg reduced the cough response to ETI in propofol anaesthetized dogs  .
Intraocular blood volume is influenced by intraocular vascular tone (vasodilatation or vasoconstriction), arterial blood pressure (ABP) and outflow of the blood from the globe . Is well known that exist an inverse proportional relationship between arterial carbon dioxide tension (PaCO2) and vascular tone. Increased carbon dioxide tension causes choroidal vessel vasodilatation and an increase in IOP. Hypoxaemia can be detect using pulse oximetry and should be avoided by oxygen supplementation and ventilation. PaCO2 can be monitored by capnography or arterial blood gas analysis and controlled using IPPV. However, inappropriate use of IPPV can increase CVP by increasing intrathoracic pressure during inspiration, resulting in an increase in IOP.
Cataract phacoemulsification is not a very painful procedure except during the incision and suturing of the corneal limbus. Traditionally, most anesthetic molecules mildly decrease IOP by increasing the outflow of aqueous humor. The use of anesthetic induction agents such as propofol, alfaxalone, ketamine and etomidate may all increase IOP. All are ameliorated by co-induction agents like opioids, midazolam or diazepam .
One limitation to the present study was the small number of the patients (sixteen animals – eleven dogs and five cats) used.
In conclusion, if the realization of the neuromuscular block for phacoemulsification is not possible, we can perform anesthesia for this procedure using just the standard molecules like lidocaine, propofol, midazolam, fentanyl, ketamine and tramadol. The recovery period after a classic anesthesia without neuromuscular block is much shorter than that achieved after a curarisation and the probability for hypotension is less likely. On the other hand, after induction, a basculation of the eyes towards the internal angle was observed for all studied cases. In order to achieve the phacoemulsification surgery, the eye was brought to the central position by means of the traction sutures.
The great disadvantage is the fact that without neuromuscular blocking agents we can`t obtain the central position of the eye globe and that implicate make some compromises from the surgeon.
Ana Nemec, DVM, PhD, Dipl. AVDC, Dipl. EVDC; Ana Rejec, DVM, PhD, Resident, Veterinary dentistry
Animal Hospital Postojna, Cesta v Staro vas 20, 6230 Postojna, Slovenia
Case history and clinical signs
A 4-year-old 30-kg female spayed German shepherd was presented due to rapidly growing rostral maxillary mass. At presentation, the proliferative mass, located around right maxillary third incisor and canine tooth was ulcerated and bleeding (Fig. 1). The patient was otherwise healthy with physical exam findings, CBC and biochemistry all within normal limits. Staging options were discussed and the client elected computed tomography (CT) of the head and neck as well as chest CT together with biopsy of the lesion and an abdominal ultrasound.
Imaging and histopathology findings
Pre- and post-contrast CT images revealed an invasive lesion, located primarily around the maxillary canine tooth and extending from the right maxillary second incisor tooth to the mesial root of the right maxillary second premolar tooth, occupying majority of the right nasal cavity and crossing the midline (Fig. 2). CT of the neck and chest revealed no metastatic disease to the regional lymph nodes and lungs, and abdominal ultrasound was also within normal limits.
Histopathology of the lesion revealed spindle-cell neoplasm, with differential diagnoses being fibrosarcoma or spindle-cell amelanotic melanoma, and further immunohistochemistry using Melan A and PNL-2 antibodies was performed and was suggestive of amelanotic melanoma.
A stage III (with no detectable metastasis based on the diagnostics performed) amelanotic melanoma was diagnosed.
Treatment and follow-up
Due to an extensive involvement of the nasal cavity, wide resection was impossible to achieve without significantly impairing the cosmetic appearance and function of the animal, and the client elected palliative-intent extended unilateral rostral maxillectomy to reduce tumor burden (Figs. 3-5), followed by a course of adjuvant hypo-fractionated radiotherapy of the surgical area (6 x 6 Gy twice weekly) 3 weeks after the surgery (Figs. 6-9).
Melanoma vaccine treatment (4-dose, biweekly protocol, then boosters in 6-month intervals) was added to the treatment protocol as an immunotherapy approach to multimodal treatment approach. At all re-checks, the patient was clinically healthy and the most recent re-check head and neck and chest CT revealed no metastases 5 years after the diagnosis (Fig. 10).
Malignant melanoma (OMM) is the most common nonodontogenic oral tumour in dogs. Clinical signs may vary greatly; the tumour is not necessarily pigmented (black). Histopathological diagnostics may be complicated as a tumour may present as amelanotic variant and/or as epithelioid-cell OMM, spindle-cell OMM or mixed-cell OMM. Therefore, immunohistochemistry is often needed to determine the diagnosis. OMM is locally invasive, with 50% of tumours being associated with surrounding bone invasion. Metastases are also common: in 74% of cases, OMM metastasise in regional lymph nodes and in up to 92% of cases in the lungs.
Hence, before any treatment is attempted, a patient with an OMM needs to be properly staged. To evaluate local disease, tumor location is noted and the lesion measured. Diagnostic imaging of the local lesion should include pre- and post-contrast CT of the head, as skull radiographs and/or intraoral dental radiographs will underestimate the extent of the lesion and especially invasion of maxillary tumor into adjacent structures. Magnetic resonance imaging (MRI) can also be considered and PET/CT is becoming available in veterinary medicine as well.
Evaluation of regional lymph nodes may be challenging. Although palpation of the mandibular lymph nodes should be routinely performed, it needs to be realized, that 40% of palpably normal lymph nodes contain metastases. Fine needle aspiration of the regional lymph nodes may be helpful, but reaching the main draining center of the head – retropharyngeal lymph nodes – requires ultrasound-guided approach. Also, it has recently been described, that consensus between cytology and histopathology for staging of lymph nodes in patients with melanocytic neoplasms is poor, and negative result does not rule out metastases. Evaluation of size and contrast-enhancement pattern on post-contrast CT images can be very helpful in evaluating regional lymph nodes for metastases, and PET/CT is also very promising. Excisional biopsy of the lymph nodes is debatable, as complete staging requires removal of all lymph nodes of the head and neck. Excisional biopsy of the sentinel lymph node – technique which is well developed in human medicine – is the goal and determination of the sentinel node will hopefully become easier with advanced imaging techniques.
Staging is completed with evaluation of distant organs for possible metastatic disease, where chest CT is much more sensitive to diagnose pulmonary metastases compared to thoracic radiographs. Full body CT may be recommended, if involvement of abdominal organs is suspected, which is rare in cases of canine OMM, and abdominal ultrasound is usually performed.
Once the stage of the OMM is determined, the treatment approach(es) and prognosis can be discussed with the client. It is worth mentioning here, that scientific data on treatment outcomes for specific stage OMM, especially when several treatment approaches are combined, are scarce. Hence, proper communication with the client is extremely important to present as much as possible information and keep realistic expectations. Generally, prognosis for animals, especially if the tumour arises from dentate areas, is guarded due to early and common metastases. Dogs with small OMM (smaller than 2 cm in diameter, stage I) located rostrally and those without metastases, have the best prognosis. With radical tumour resection (tumour with associated 1 cm of healthy tissues as determined by CT) median survival time was reported to be 723 days and related to tumor stage. It has also been reported, that even incomplete tumour resection (dirty margins) increases survival time. When complete resection cannot be achieved (as was expected in the presented case), or the client declines surgical treatment, or when surgery has resulted in incomplete removal of the tumor, or when regional metastases are present, other treatment options exist, although some studies questioned the benefits of adjuvant therapies. When recommending an adjuvant treatment, most commonly suggested is radiation therapy, which can also be the sole treatment for OMM (local and regional disease). The outcome of radiation therapy depends, as with surgery, on the stage of the tumor as well as on the radiation protocol; most commonly hypo-fractionated radiation protocols are recommended and, when used as a sole treatment of OMM, can result in median survival times a bit shorter than those achieved with surgical treatment. Acute side effects, such as radiomucositis are common, expected and usually resolve with supportive treatment, while late life-threatening side effects, such as osteoradionecrosis or secondary tumors, are rare, but need to be discussed with the client in advance, especially when long-term survival of irradiated patients is expected.
OMM is considered poorly responsive to chemotherapy, but is a highly immunogenic tumor. Although the exact immune mechanisms are not completely understood and are likely individually-specific, several immunotherapy and/or gene-electrotransfer therapy approaches have been suggested for canine OMM patients. Most (clinical) research has been performed on a canine melanoma vaccine (xenogeneic plasmid DNA with a cDNA insert encoding human tyrosinase), which has been shown to be safe, but data on its’ efficacy are conflicting. Although it remains unclear, what (if any) role melanoma vaccine and other treatments played in the prevention of metastatic disease in the case described in this report, it is important to realize, that the outcome of canine OMM treatment may not neccessary be poor. In addition, new multimodal approaches are being developed to treat canine OMM and are changing this disease with historically poor outocme into a chronic disease, at least in selected cases.
Clinical study at Animal Hospital Postojna
At Animal Hospital Postojna we recently began a study titled “Evaluation of immune system response to hypo-fractionated radiotherapy in canine non-operable oral, cutaneous or digital melanoma’ together with the Oncovet Clinical Research Centre in France. The study aims to evaluate immune system response to hypo-fractionated radiotherapy in canine non-operable oral, cutaneous, or digital melanoma and to assess the ability of this therapy to improve the response to immunotherapy in combined treatment. With the client’s agreement, we include dogs (males and females) with malignant melanoma when the tumour cannot be surgically removed, either due to its localisation preventing the recommended wide excision, or the client’s refusal to approve such a procedure. In that case, hypo-fractionated radiotherapy remains the preferred treatment. If you or anyone you know are interested in participating in the study and would like to know more about the study protocol and obligations, risks and potential constraints as well as benefits that we offer if you decide to participate, please, contact us at email@example.com
Brachycephalics are patients that are prone to the increase in the superior airways’ resistance, with the decrease of the airflow at the level of the nose or mouth, which implies higher risks and complications associated with anaesthesia.
The acute obstruction of the superior airways can manifest itself consequently to the overheating syndrome (excessive heat, excessive humidity, after physical effort, hyperthermia), post-detubation or as the worsening of a chronic obstruction.
The overheating syndrome is represented by the the body’s incapacity to dissipate the accumulated heat and can manifest clinically through hyperthermia (> 41° C), dysfunctions of the central nervous system, the activation of the inflammatory mechanisms, hemostasis disorders and initiation of the systemic inflammatory response syndrome (SIRS). The physiopathological cascade can evolve through multiple organ dysfunction syndrome (MODS), acute respiratory distress syndrome (ARDS), acute kidney injury (AKI), disseminated intravascular coagulation (DIC).
The risk factors for the triggering of the overheating syndrome are represented by any anterior episodes, obesity, breed (brachycephalics, Golden Retriever, Labrador), elevated ambiental temperatures and humidity, poor acclimatization, low resistance to physical effort.
Hyperthermia can generate cerebral hypoperfusion, neuronal necrosis, vascular lesions, cerebral edema, haemorrhages, multifocal vascular thromboses. The clinical signs can be spontaneous haemorrhages (petechiae, hematemesis, hematochezia).DIC can appear anytime during the first 24 hours after the incident (close monitoring). Hyperthermia can trigger oxidative stress mechanisms, which can act at gastrointestinal level through intestinal ischemia, cytoskeleton relaxation, increase in intestinal permeability and finally, bacterial translocation. Temperature control is essential for the limitation of clinical manifestations (tachypnea, tachycardia, vasodilation, massive haemorrhagic diarrhea and hematemesis coagulopathies, miocardial hypoperfusion, lactic acidosis, electrolitic disturbances, cardiac arrhythmias, stupor, convulsions, exitus). The patient will have to be cooled simultaneously with the administration of fluids for the control of tissular perfusion and hydroelectrolytic disorders. Crystalloid isotonic fluids will be administered, supplementing, if needed, with colloid boluses, depending on the hydration state, cardiovascular potential and the electrolytic status of the patient. The therapy will continue without interruptions until the patient is stable. In severe cases, it is necessary to start the antimicrobial therapy for restricting the endotoxemia and preventing sepsis ( broad-spectrum antibiotics). The therapy will be completed with gastrointestinal protectors, H2 antagonists (famotidine) and proton pump inhibitors (pantoprazole). Continuous monitoring throughout the therapy is mandatory, because the patients need re-evaluation and consequent adaptation of the therapy.
The key points in the therapeutical management of the overheating syndrome are:
- Oxygen supplementation
- Sedation, general anaesthesia
- Temperature control
- Control of the tissular perfusion and of the acid-base and hydroelectrolytic disorders
- Correction of homeostasis disorders
- Maintenance of the renal function
- Blood glucose monitoring
- Antimicrobial therapyPurpose:
Oxygen supplementation is necessary when the patient first shows up ( starting with the triage phase) in the case of acute respiratory distress syndrome (ARDS), noncardiogenic pulmonary edema or laryngeal edema. Brachycephalics in thermal shock exhibit compensatory hyperventilation or can’t oxygenate themselves enough, consequently to respiratory insufficiency, with high respiratory effort, hyperthermia, muscular exhaustion and, finally, respiratory arrest! The immediate control of hypoxemia initially requires oxygenation through noninvasive methods, followed, if needed, by additional invasive procedures (general anaesthesia with endotracheal intubation, nasal oxygenation catheter, tracheal catheter, tracheotomy/ tracheostomy). High air flow devices can be used for oxygenation (>15l /min.)- oxygen tent/cage, AMBU-bag or low flow devices(<6l/min.)-mask, nasal oxygenation tube, endotracheal probe, tracheal catheter.
Assisted ventilation is recommended either in case of hypercapnia (PaC O2 >60 mmHg) or severe hypoxemia (PaC O2 <80 mmHg or SpO2 <90%) with persistent cyanosis despite having oxygenation levels reaching 100%.Possible complications regarding mechanic ventilation are correlated to the accidental disconnection of the patient, device failures, barotrauma, atelectasis or oxygen toxicity.
Brachycephalics are NOT the best candidates for „a simple sedation”, requiring, in most cases, general anaesthesia protocols. Given the fact that all anaesthetics affect the respiratory function through central depression or through muscle relaxation, a continuous monitoring is necessary, from premedication to the patient waking up from anaesthesia.
Preanaesthetic evaluation will be cautiosly approached, in order to reduce the perioperative mortality, by tracing and evaluating the risks and by adjusting the perioperative protocols. The patients will be premedicated in order to reduce stress, anxiety, agitation, this also leading to a decrease of the doses that are necessary for maintenance. For critical patients, premedication can be excluded, but analgesia must be maintained! A minimal contention is recommended, without a muzzle! For brachycephalics, preoperative preoxygenation is mandatory. For induction, the lowest propofol doses will be slowly administered intravenously. (1.0 mg/kg slowly injected intravenously for the first 15 seconds, then another 1.5-2 mg/kg until reaching the desired effect). The administration of propofol in rapid bolus causes apnea, bradycardia, hypotension and respiratory depression. Propofol reduces the cerebral metabolism, the cerebral blood flow and the intracranial pressure, also alleviating the effects of the hypoxic lesions, and inhibiting lipid peroxidation, having an antioxidative action.
The endotracheal intubation of the brachycephalics must be done with care. It is hard to anticipate the dimension of the trachea by the size of the patients, because they often have hypoplastic tracheas. Anaesthesia is maintained gaseously, ensuring the efficient ventilation of the patient. For avoiding regurgitation, the patients will be positioned slighly forward, with the anterior extremity lifted at . Inhalation anaesthesia protocols can be carried out, if needed, at the same time with the administration of opioids (bolus or CRI) or with locoregional anaesthesia techniques (blockages, infiltrations, epidural etc.).
Secondary effects can appear at high doses of opioids (dysphoria, bradycardia, respiratory depression). For ensuring the polymodal analgesia, opioids, NSAIDs and local anaesthetics can be administred.
Managing the hemostasis disturbances implies the stabilization of the coagulation system, the administration of fresh frozen plasma or anticoagulants, for preventing thromboses.
Maintaining the renal function is possible in the case of patients suffering from thermal shock through maintaining the perfusion and oxygenation of the kidney. Hypovolemia and dehydration will determine the arterial tension and the cardiac output to lower, leading to the decrease of the renal perfusion ( renal ischemia). Lowering the oxygenation at renal level will favor the triggering of acute renal insufficiency. Consequent rhabdomyolysis and myoglobulinemia will damage the kidney even more. If the urine output is low (<1ml/kg/h) even after fluidotherapy, furosemide and/or mannitol can be administered. Mannitol (osmotic diuretic) will reduce the water content of the neuronal cells, will increase the reanl perfusion and diuresis. Furosemide can be administered at 15 minutes after the administration of mannitol. An option for hyperhydration, uremia or different electrolytic imbalances is represented by hemodialysis.
Monitoring the glycemia is very important for critical patients, because the ones that are hypoglycemic have a hard time compensating!
A particular situation is represented by the acute obstruction of the superior airways after detubation. The muscles of the superior airways, which are relaxed post anaesthesia, can favor the appearance of acute obstructions at brachycephalic breeds, together with the inflammation of the larynx and the pharynx, especially after the specific correctional surgical procedures. That is the reason why it is recommended to postpone these patients’ extubation for as long as possible after anaesthesia and to supplement their oxygenation through noninvasive methods (nasal oxygenation probes, prongs, oxygen cage), until they have completely recovered from it. Since the risk of complications is high, it is good to be prepared for a possible reintubation or even for invasive oxygenation methods (trecheotomy, trecheostomy).
Lazar Laura¹, Fodor Lucian²,
¹ʼ²ʼDVM, Veterinary clinic, Happy Pet Timisoara, Romania
Key words: inguinal hernia, intestinal occlusion, acute abdomen, enterectomy
An inguinal hernia is a condition in which the abdominal contents protrude through the inguinal canal or inguinal ring, an opening which occurs in the muscle wall in the groin area.
In dogs, inguinal hernias may be acquired (not present at birth but developing later in life) or congenital (present at birth). Factors which predispose a dog to develop an inguinal hernia include trauma, obesity, and pregnancy.
Most inguinal hernias are uncomplicated and cause no symptoms other than a swelling in the groin area. However, if contents from the abdominal cavity (such as the bladder, a loop of intestines or the uterus) pass through the opening and become entrapped there, the situation can become life-threatening.(2)
Inguinal hernia may evolve to scrotal hernia when herniated viscera pass down the inguinal canal.The internal, or deep, inguinal ring remains patent in intact male animals.(1)
Inguinal hernias can usually be diagnosed by finding the swelling caused by the hernia on a physical examination. However, sometimes contrast radiographs (X-rays) or an abdominal ultrasound are needed to determine which abdominal contents, if any, are entrapped.(2)
A six year old intact male jack russel terrier,fully vaccinated and dewormed suffering an episod of letarghia, voma and apatia for two days.He followed an symptomathic treatment with painkillers and antispastics from his current veterinarian.
The owner became worried because his symptoms got worse, so he was admitted in our clinic as an emergency after the program hours.
his symtomps included:
-severe peritoneal response
-the left testicle was increased in volume
An abdominal ultrasound was performed, was noticed a decreased intestinal motility, with gas presence.
inghino-scrotal hernia/intestinal occlusion
The pacient was initially rehydrated, after stabilization of vital functions was put under general anesthesia and intubated.Surgical intervention was performed, starting initially with the opening of the affected testicle who was enlarged, coloured modified and continuing with medial celiotomy(Fig.1).The terminal part of the small intestine was herniated inside of the spermatic cord (Fig.2).The affected part was aproximatly 10 cm long, with modified tissue and with the rupture of the intestine wall. (Fig 2,3,4) .Following this an enterectomy was performed (fig. 5) with termino-terminal enteroanastomosis.( Fig. 6,).The pacient was also castrated.
The patient condition improved very fast within hours he drank water and ate food.He was also very responsive and playful from the first day.He followed five days of treatment with Metronidazol (20 mg/kg/2×1/day).
The inghino-scrotal hernia is a medical emergency and the intervention must be in the shortest time due to life threatening.
- Jubb, Kennedy and Palmer’s, Pathology of domestic animals, E Book, vol. II, pg.80
Dr Delureanu FlorinCristian
Veterinary Center Otopeni
An ample loss of skin with underlying tissue and exposure of deep components (eg. tendons, ligaments, bones) define a degloving injury. This kind of wounds are most frequent seen on the distal limbs, medial tarsus/ metatarsus. The main cause of deglowing wounds is car accident, special when the animal is dragged or pushed by a moving car. In all of the cases bacteria and debris are present in the wound.
Free grafts are described as a piece of skin detached from an area of the body and placed over the wound. There are two tipes of free grafts when we talk about graft thickness: full thickness (epidermis and entire dermis); partial/split thickness (epidermis and a variable portion of dermis). Skin grafts are using when exist a defect that cannot be closed by skin flaps or direct apposition. Two factors influence skin graft survival: revascularization and absorbtion of the tissue fluid.
A 4 years old female shorthair cat, weighting 3,25kg was presented to our clinic. Before that, the owner was at another clinic for consult and he was disappointed because they recommended euthanasia or amputation of the limb. Besides, the first vet treated the cat with Amoxi+Clavulanic Acid and Nekro Veyxym. The owner said that she went missing for about 10 days.
After a thorough clinical exam we found that all was normal excepting the degloving injury. The back right leg was affected. There was a massive inflammation with infection and a lot of debris on the dorsal surface of metatarsal area and ventral, above metatarsal pad. On the dorsal surface of metatarsal area (Picture 1). Besides, also in the ventral area, another wond proximal to the metatarsal pad and 3 deep holes was identified at the base of second, third and fourth finger (Picture 2). It could be distinguished the chronic aspect. A third lesion was registrated on the same leg, in the medial aspect of the thigh. This wound was deep with a circular shape (Picture 3). We estimated that the lesion occurred about two weeks ago. We register pain and high local temperature after palpation. The cat was stable, normothermic, with normal color on mucous membrane, CRT 3seconds and normal superficial lymph nodes.
Radiograph of the affected back limb
Two x-ray views was made to eliminate bone changes or foreign bodies (Picture 4a, Picture 4b).
Picture 4a, 4b- Specialist describe: Suspected slight thickening of phalanges cortical 1 fingers 3-4 and gently bending them. Soft tissue swelling of the tibio-tarso-metatarsian region.
After evaluation, the initial recommendation include a good wound management under anesthesia. Before surgical debridment (Picture 5a, 5b), culture was done.
Picture 5a and Picture 5b – Dorsal and ventral aspect of the lesions after surgical debridment
Next, wound lavage was initiated with one bag of 500 ml of worm saline (the most easy way to deliver fluids on the wound is to connect the saline bag with a administration set to the syringe and needle with a 3-way stop cock a large amount of liquid is needed to be effective).
Finally, this first stage ends with a wet to dry bandage. A primary wound closure was performed for the lesion placed on the medial aspect of the thigh (Picture 6), after intensive cleaning, removal of foreign bodies and dead skin .
Empirically the cat receive Cefquinome until the result arrive and for pain management we administered Tramadol 3mg/kg and Meloxicam 0,1-0,2mg/kg. The cat recover well after anesthesia.
One day before performing surgery, we recived the culture result. Streptococcus canis (++++) was identified and was sensible to many antibiotics. Amoxicilin+Clavulanic Acid (Synulox) was initiate for general therapy and chloramphenicol ointment (Opticlor-Pasteur) for local therapy.
Next, a full thickness mesh graft was used on the dorsal aspect of the limb due to the length and depth of the wound and the other wound was left for healing by second intention, both being protected by bandages. In the next 10 day the limb wounds was treated in the same manner. Removal of bacteria, granulation tissue formation and the beginning of epithelization were supported by next bandages as follows: ·
Day 1 – wet-to-dry bandage was used after surgical debridment. (this kind of bandages adhere to the wound and remove the little layer of dead tissue when we take off). Soaked in warm saline 1-2 minutes before removing, they were changed after 24hours one to the other. Cotton gauze was the primary contact-layer of the bandage.
- Day 2 and day 3
– moisture retentive dressing (MDR) – calcium alginate (Sorbalgon-Hartmann) was the primary contact-layer. It is good to use when it exist high exudate like in our patient (Picture 7a, 7b).
- Day 4,6 and day 9
– moisture retentive dressing (MDR) – hydrocolloid (Hydrocoll-Hartmann) was the primary contact-layer because the discharge decreased (Picture 8).
Describing surgical procedure:
Preoperative surgical site preparation: The cat was placed in left lateral recumbency, with the wound exposed. The limb was clipped entirely and povidone iodine and alcohol was used for aseptic surgery. Sterile warm saline 0.9% was use for wound lavage. Meanwhile a colleague prepare the donor site in the same manner- lower cranio-lateral thorax (right side). Almost 1mm of epithelium that has started to grow from the wound edges over the granulation tissue was removed using a thumb forceps and a no. 10 scalpel blade (Picture 9). A perpendicular incision was made right at the edge of haired skin with epithelium. The wound was incised all around and after that the epithelium was removed by advancing the scalpel blade under the epithelium around
the wound. Then, undermining was performed around the wound edges. A fragment of sterile surgical drape was used over the wound to get the exact shape. The drape “pattern” was placed to the donor area.
To maintain the wound moist, i placed over it a cotton gauze moistened in warm sterile saline 0.9% while the graft is transferred.
The direction of hair groth was marked with a black arrow above the donor site so that the direction of the hair groth on the graft will be the same as the hair groth direction on the skin surrounding the wound. After that, the margins of the drape “pattern” was traced on the skin. The skin of the donor bed was incised with No.10 scalpel balde and removed using thumb forceps and Metzenbaum scissors (Picture 10). The defect left after removing the graft was primary closed by undermining and advancing the skin edges with walking sutures using 3-0 monofilament absorbable suture material and finally the skin was sutured in a simple interrupted suture manner using 2-0 monofilament absorbable suture (Picture 11a, 11b).
Preparing the graft
The dermal side of the graft was placed on a polystyrene board with a thickness of 10cm covered with a sterile drape and after that we fixed and stretched with 21G needles. The subcutaneous tissue was removed from the graft. Next, made parallel incisions was made in the graft, 0.5-0.7cm long and apart (Picture 12). At the end, the graft was placed on the granulation bed and sutured with 4-0 monofilament nonabsorbable suture in a simple interrupted suture manner. Additional tacking suture was placed to ensure the expansion of the mesh incision and allow the fluid drainage (Picture 13).
Choosing the right bandage after grafting and aftercare
It is important to use a nonadherent primary dressing. My initial choise was Grassolind (Hartmann), is sufficiently porous to allow easy passage of exudate from the wound surface, preventing maceration of surrounding tissue (Picture 14). The ventral metatarsal wound maintain hydrocolloid dressing (Hydrocoll-Hartmann) as primary layer. After that, a thin layer of chloramphenicol oinment (Opticlor-Pasteur) was used all around both wounds and over the graft.
Over the first dressings was applied 5cmx5cm compress (Medicomp-Hartmann) and a roll gauze was the second layer. After a few laps of gauze stirrups was placed to secure the bandage in place. Extemporaneous half “clamshell” splint (Picture 15) was made from plastic material wich was curved in such a way that the limb was fixed in semi flexion. The splint is a little bit longer than the extremity of the pelvic limb (“toe-dancing” position), thus provide a maximum relief pressure. In the proximal area, under the splint, I put cotton to prevent pressure injuries on the caudal aspect of the thigh. Applied from proximal to distal and with moderate tension, elastic warp was the final protective layer of the bandage and it was secured at the proximal end with tape.
The bandage was changed in day 1, 3, 5, 7 and 10 post op. In day 10 the suture material was removed from the graft and from the donor site. From day 17 to day 29 hydrogel (Hydrosorb-Hartmann) was used as primary bandage layer and the bandage was changed from 4 to 4 days. In day 29 no discharge was present in the bandage; the wound was completely healed and 0,2-0,4 mm of hair was present in the center of the graft.
A delayed healing occurred at the wound in the ventral region (Picture 16). From day 29 to day 59 epithelization has advanced very hard and granulation tissue has captured an appearance of ulcer (in this time the wound was asepseptic prepared and hydrocolloid and hydrogel was used as primary layer bandage and without the splint). In day 59 the wound was refreshed on the surface with a scalpel blade and laser therapy (Picture 17a) and medical Manuka honey (Picture 17b) was used daily for 14 days. After that, a complete healing was reached.
Illustrating wounds evolution after surgery
Day 11 after honey and laser therapy
Day 16 after honey and laser therapy
Comparing day 1 and after 3 Months