RESUMEN
OBJECTIVE: To describe the use of near-infrared angiography (NIRFA) to identify the vascularization of three canine axial pattern flaps (APFs) omocervical (OMO), thoracodorsal (THO), and caudal superficial epigastric (CSE); to establish a vascular fluorescence pattern (VFP) grading system; and to evaluate the effect of NIRFA on surgeon flap dimension planning compared to traditional landmark palpation (LP) and visualization assessments. STUDY DESIGN: Experimental study. ANIMALS: A total of 15 healthy, client-owned dogs. METHODS: Dogs were sedated and flap sites were clipped. LP-based margins were drawn and preinjection images were recorded. Indocyanine green (ICG) was administered and VFP images were recorded. VFP scores were determined by five surgeons. Margin alterations were performed based on NIRFA-ICG images. Altered measurements were compared between LP and NIRFA-ICG images. RESULTS: Vascularization of the CSE flap was most visible with NIRFA with VFP scores 4/4 for 13/15 dogs. Intersurgeon agreement for VFP grades was poorest for THO (ICC = 0.35) and intermediate for OMO (ICC = 0.49) flaps. Surgeons were more likely to adjust dimensions for CSE flaps relative to OMO (OR 17.3, 95% CI: 6.2, 47.8) or THO (25.5; 8.6, 75.7). CONCLUSION: Using a grading system, we demonstrated that the CSE flap was most visible. Surgeons were more likely to adjust the LP-CSE flap margins based on fluorescence patterns and were more likely to rely on LP when visualization scores were low. CLINICAL SIGNIFICANCE: NIRFA has possible applications identifying some direct cutaneous arteries of APFs and their associated angiosomes in real-time. Further investigation is indicated to study NIRFA's potential to improve patient specific APF planning.
Asunto(s)
Angiografía con Fluoresceína , Verde de Indocianina , Colgajos Quirúrgicos , Perros , Animales , Colgajos Quirúrgicos/veterinaria , Colgajos Quirúrgicos/irrigación sanguínea , Angiografía con Fluoresceína/veterinaria , Angiografía con Fluoresceína/métodos , Femenino , Masculino , Piel/irrigación sanguínea , Piel/diagnóstico por imagenRESUMEN
OBJECTIVE: To analyze risk factors for complicated perioperative recovery of dogs undergoing either staphylectomy or folded flap palatoplasty. STUDY DESIGN: Retrospective study. ANIMALS: Seventy-six client-owned dogs. METHODS: Medical records of dogs that underwent either staphylectomy or folded flap palatoplasty were reviewed for signalment, brachycephalic risk (BRisk) score, history of gastrointestinal signs, laryngeal collapse grade, presence of preoperative aspiration pneumonia, intraoperative respiratory and cardiovascular complications, length of general anesthesia, number of corrected brachycephalic obstructive airway syndrome (BOAS) components, and gastrointestinal and respiratory postoperative complications. Complicated recovery was defined as requirement for prolonged oxygen treatment and/or tracheostomy or perioperative death. Penalized logistic regression was used to identify risk factors. RESULTS: Seventy-six dogs were enrolled in the study. Multivariate penalized logistic regression identified four risk factors for complicated recovery. These include surgery type (p = .0002), age (p = .0113), laryngeal collapse grade >2 (p < .0001) and length of general anesthesia (p = .0051). CONCLUSIONS: In this population, dogs that had staphylectomy, increasing age, laryngeal collapse grade >2 and increasing length of general anesthesia were at increased risk for perioperative complicated recovery. CLINICAL SIGNIFICANCE: The results of this study identified risk factors for perioperative complicated recovery in dogs undergoing elongated soft palate correction and may assist in surgical planning and early prediction of complications.
Asunto(s)
Enfermedades de los Perros , Complicaciones Posoperatorias , Perros , Animales , Factores de Riesgo , Estudios Retrospectivos , Masculino , Femenino , Complicaciones Posoperatorias/veterinaria , Enfermedades de los Perros/cirugía , Paladar Blando/cirugía , Colgajos Quirúrgicos/veterinaria , Procedimientos de Cirugía Plástica/veterinaria , Procedimientos de Cirugía Plástica/métodos , Anestesia General/veterinaria , Anestesia General/efectos adversosRESUMEN
A 6-year-old neutered male mixed-breed dog underwent curative-intent surgical resection of a hard palatal multilobular osteochondrosarcoma and closure of the defect using bilateral buccal mucosal flaps. However, failure of the flaps resulted in a massive hard palatal defect that was subsequently repaired using a haired skin angularis oris axial pattern flap. This report describes the clinical outcome using this surgical approach and novel complications encountered. Key clinical message: The haired skin angularis oris axial pattern flap appears to be a suitable and robust option for reconstruction of large palatal defects.
Utilisation d'un lambeau cutanée poilus avec rotation axiale au niveau de l'artère angularis oris chez un chien pour corriger une fistule oronasale volumineuse secondaire à la résection d'un ostéochondrosarcome multilobulaire du palais dur. Un chien croisé mâle castré de 6 ans a subi une résection chirurgicale à visée curative d'un ostéochondrosarcome multilobulaire du palais dur et une fermeture de l'anomalie par des lambeaux de la muqueuse buccale. Cependant, la défaillance des lambeaux a entraîné un défaut important du palais dur qui a ensuite été réparé à l'aide d'un lambeau de peau avec poils avec rotation axiale au niveau de l'artère angularis oris. Ce rapport décrit les résultats cliniques de cette approche chirurgicale et les nouvelles complications rencontrées.Message clinique clé :L'utilisation d'un lambeau de peau avec poils avec rotation axiale au niveau de l'artère angularis oris semble être une option appropriée et robuste pour la reconstruction des défauts importants du palais.(Traduit par Dr Serge Messier).
Asunto(s)
Enfermedades de los Perros , Colgajos Quirúrgicos , Animales , Perros , Masculino , Enfermedades de los Perros/cirugía , Colgajos Quirúrgicos/veterinaria , Paladar Duro/cirugía , Osteosarcoma/veterinaria , Osteosarcoma/cirugía , Neoplasias Óseas/veterinaria , Neoplasias Óseas/cirugía , Neoplasias Palatinas/veterinaria , Neoplasias Palatinas/cirugía , Fístula Oral/veterinaria , Fístula Oral/cirugía , Fístula Oral/etiología , Complicaciones Posoperatorias/veterinaria , Complicaciones Posoperatorias/cirugíaRESUMEN
OBJECTIVE: To describe the use of a barrier membrane in dogs for repair of congenital hard palate defects and closure of oronasal fistulae (ONF) remaining after previous cleft palate (CFP) repair. ANIMALS: 7 client-owned dogs. METHODS: The hard palate defect was closed with medially positioned flaps (Von Langenbeck technique) or pedicle flaps (2-flap palatoplasty) and a membrane composed of autologous auricular cartilage from the pinna or allogenous fascia lata underlying the mucoperiosteal flaps. RESULTS: All palate defects were considered to have a high risk of dehiscence based on their type and size and the characteristics of the surrounding tissue. The barrier membrane was used in 5 dogs for repair of congenital hard palate defects and in 2 dogs for closure of ONF remaining after previous CFP repair. Resolution of clinical signs occurred in all cases. Complete success (ie, complete closure of the palate defect and absence of clinical signs) was achieved in 5 dogs (4 with congenital hard palate defects and 1 with an ONF remaining after previous CFP repair). The persistent ONF in 1 dog with functional success (incomplete closure, but no clinical signs) was smaller than prior to surgery. CLINICAL RELEVANCE: Barrier membranes underlying mucoperiosteal flaps may constitute an alternative technique in dogs for repair of congenital hard palate defects and closure of ONF remaining after previous CFP repair.
Asunto(s)
Fisura del Paladar , Enfermedades de los Perros , Enfermedades Nasales , Procedimientos de Cirugía Plástica , Humanos , Perros , Animales , Fisura del Paladar/cirugía , Fisura del Paladar/veterinaria , Paladar Duro/cirugía , Procedimientos de Cirugía Plástica/veterinaria , Colgajos Quirúrgicos/veterinaria , Fístula Oral/cirugía , Fístula Oral/veterinaria , Enfermedades Nasales/cirugía , Enfermedades Nasales/veterinaria , Enfermedades de los Perros/cirugíaRESUMEN
OBJECTIVE: Sinus osteotomy is currently performed in equine surgery with conventional surgical methods, such as trephines and oscillating bone saw, leading to subsequent trauma to the bone during cutting. Piezoelectric devices are now used in maxillofacial surgery in humans as a standard tool as it is less traumatic than the oscillating bone saw and shortens the healing period. The aim of this study was to show that the piezoelectric device can be used for equine sinus surgery, compare its use with the oscillating bone saw, and describe the outcome of cases involving osteotomy performed with a piezoelectric surgical device. ANIMALS: 10 horse specimens for cadaveric study and 11 client-owned equines for clinical evaluation. METHODS: Each cadaveric head underwent a frontonasal bone flap on a randomly assigned side with the piezotome and the oscillating bone saw on the opposite side. Surgical time was recorded for every procedure, and gross examination was performed. A Welch t test was used to compare the surgical time between piezoelectric and oscillating saw use. For the clinical study, animals presented for sinonasal surgery at the hospital from March through October 2023 were included. RESULTS: Osteotomy was possible with the piezotome in all animals. Surgical time was significantly increased when using the piezotome in comparison with the oscillating saw (P < .05). All clinical patients were treated adequately for the sinonasal disorder they were presented for using the piezotome instead of the oscillating saw. No adverse effects nor long-term complications related to its use have been noted, and preservation of the surrounding soft tissues was evident. CLINICAL RELEVANCE: The use of a piezoelectric device in equine surgery is feasible. However, the cadaveric study showed an increased surgical time to perform a frontonasal bone flap.
Asunto(s)
Cadáver , Enfermedades de los Caballos , Osteotomía , Piezocirugía , Caballos/cirugía , Animales , Osteotomía/veterinaria , Osteotomía/métodos , Osteotomía/instrumentación , Piezocirugía/instrumentación , Piezocirugía/veterinaria , Piezocirugía/métodos , Enfermedades de los Caballos/cirugía , Femenino , Masculino , Colgajos Quirúrgicos/veterinaria , Senos Paranasales/cirugíaRESUMEN
Purpose: The current study aimed at evaluating the repair of a partial defect of the trachea with a muscle flap, an advanced technique that employs combined suture patterns. Methods: Sixteen healthy male New Zealand white rabbits were used as an experimental model. A partial defect in the trachea within the ventral region of the fourth to eighth tracheal ring was created. Subsequently, repair was initiated with a flap of the sternocephalicus muscle. The animals were divided into four groups for postoperative evaluation using clinical, tracheoscopic, and histopathological analyses. Each group was separated according to the time of euthanasia, programmed at interval of seven (G7), 15 (G15), 30 (G30), and 60 days (G60). Results: One animal from the G60 group died, whereas the other animals had good surgical recovery without serious changes in the breathing pattern. The major clinical signs observed were stridor and coughing. Tracheoscopy revealed secretions in the tracheal lumen, exuberant granulation, and stenosis. Histopathological analysis showed growth of the ciliary respiratory epithelium at the flap site 30 days after implantation. Conclusions: Partial repair showed satisfactory results owing to the anatomical location of the muscle, adequate vascular support, and structural and physiological maintenance without serious changes in the respiratory system.
Asunto(s)
Animales , Conejos , Conejos/cirugía , Colgajos Quirúrgicos/veterinaria , Enfermedades de la Tráquea/veterinaria , Endoscopía/veterinariaRESUMEN
O trauma é frequentemente relatado na rotina clínica de pequenos animais, podendo gerar fraturas de componentes ósseos e lesões de tecidos moles adjacentes. No presente trabalho, objetivou-se relatar o caso de um canino, macho, sem raça definida, de sete meses de idade, vítima de trauma craniomaxilofacial decorrente de mordedura, diagnosticado com fratura e deslocamento de osso zigomático, além de importante laceração de pele. O tratamento estabelecido baseou-se no debridamento da ferida, estabilização cirúrgica de arco zigomático com fios de Nylon e na sutura dos ferimentos de pele causados. Em um segundo tempo cirúrgico, foi realizada enucleação e recobrimento do defeito na órbita com malha cirúrgica de polipropileno, além de remoção de tecido exuberante e confecção de retalho subdérmico de avanço facial lateral para recobrimento do defeito cutâneo. A complicação evidenciada na primeira intervenção cirúrgica foi a deiscência das suturas de pele, enquanto no segundo tempo cirúrgico, não houve sinais de complicações. No pós-operatório, o paciente apresentou evolução clínica satisfatória, recebendo alta médica 21 dias após o segundo procedimento cirúrgico realizado. Tendo em vista a adequada evolução clínica, bem como os reduzidos efeitos colaterais, sugere-se que a conduta clínica e técnicas cirúrgicas adotadas para tratamento do paciente em questão foram efetivas.
Trauma is frequently reported in the small animal clinics, and can lead to fractures of cranial bone components and injuries to the adjacent soft tissues. In the present study, the objective was to report the case of a seven-month-old male mongrel dog, that had a craniomaxillofacial trauma resulting from a bite, characterized by zygomatic bone fracture and displacement, in addition to a major skin laceration. The stablished treatment was based on wound debridement, surgical stabilization of the zygomatic arch with nylon threads and in the suturing of skin wounds. In a second surgical procedure, enucleation was performed and a surgical polypropylene mesh was applied to cover the orbital defect, exuberant tissue was removed and a subdermal advancement flap was used to cover the skin defect. The complication observed in the first surgical intervention was dehiscence of the skin sutures, while in the second surgical procedure, there were no signs of complications. Postoperatively, the patient had a satisfactory clinical recovery, being discharged 21 days after the second surgical procedure. Considering the adequate clinical evolution and the reduced complications, it issuggestedthat the clinical conduct and surgical techniques adopted for the treatment of the patient in question were effective.
Asunto(s)
Animales , Perros , Polipropilenos , Colgajos Quirúrgicos/veterinaria , Mallas Quirúrgicas/veterinaria , Heridas y Lesiones/veterinaria , Cigoma/cirugía , Procedimientos de Cirugía Plástica/veterinaria , Perros/cirugía , Cara/cirugíaRESUMEN
O objetivo do presente estudo é relatar a construção de um retalho direto de bolsa bipediculada com fixação apendicular à região torácica para o tratamento de lesões extensas no membro torácico direito de um gato. Foi tratado no Hospital Veterinário Unicesumar Maringá - Paraná, um felino de 1 ano de idade, apresentando lesão no membro torácico, após história de briga com outro animal da mesma espécie. Ao exame físico, apresentava fístula e edema no membro torácico direito. O paciente foi anestesiado e foi realizado o desbridamento das áreas desvitalizadas. Como terapia inicial, a lesão foi tratada como ferida aberta, até a formação de tecido de granulação, para posterior correção do defeito empregando retalho bipediculado em bolsa direta, com fixação temporária do membro à parede torácica. Após duas semanas, o membro foi desimplantado e os pontos foram removidos 21 dias após a aplicação do retalho. O uso do retalho permitiu completa cicatrização da ferida, sem ocorrência de hematomas, necrose ou deiscência de sutura. Conclui-se que a utilização do retalho bipedicular é aplicável ao tratamento de feridas traumáticas em membro torácico de felinos.
The aim of the present study is to report the construction of a direct bipedicled pouch flap with appendicular fixation to the thoracic region for the treatment of extensive lesions in the right thoracic limb of a cat. He was treated on Hospital Veterinário Unicesumar Maringá - Paraná, a 1-year-old feline, presenting injury to the thoracic limb after a history of fighting with another animal of the same species. On physical examination, he presented fistula and edema in the right thoracic limb. The patient was anesthetized and debridement of the devitalized areas was performed. As an initial therapy, the lesion was treated as an open wound until granulation tissue was formed for subsequent correction of the defect using a direct pouch bipedicled flap, with temporary fixation of the limb to the chest wall. After two weeks, the limb was unimplanted and the stitches were removed 21 days after flap application. The use of the flap allowed complete wound healing without bruising, necrosis or suture dehiscence. It is concluded that the use of bipedicular flap is applicable to the treatment of traumatic wounds in feline thoracic limb.
Asunto(s)
Animales , Gatos , Colgajos Quirúrgicos/veterinaria , Heridas y Lesiones/veterinaria , Gatos/cirugía , Colgajos Tisulares Libres/veterinaria , Traumatismos del Antebrazo/cirugía , Cirugía Veterinaria/métodos , Cicatrización de Heridas , Tejido de Granulación/cirugíaRESUMEN
A fenda palatina é a comunicação entre a cavidade oral e a nasal através de um orifício no palato. Tem diversas etiologias, podendo ser congênita, traumática, por deficiência mineral ou por fatores hormonais. O diagnóstico é realizado por meio de exame físico da cavidade oral, e a correção cirúrgica é o tratamento de escolha. Em animais adultos, pode ser corrigida com o auxílio de retalho mucoperiosteal, apresentando bons resultados. Já em filhotes, a correção cirúrgica é mais complicada, com prognóstico menos favorável. Este trabalho relata o caso de um canino, fêmea, sem raça definida, adulta, com histórico de fenda palatina secundária, de origem traumática, no palato mole por ingestão de osso. Para a correção cirúrgica, primeiramente foi utilizada membrana biológica de pericárdio bovino, mas não se obteve êxito. O segundo procedimento foi realizado com retalho mucoperiosteal simples autólogo e, dois meses após o procedimento, já havia cicatrização completa. A técnica de retalho mucoperiosteal simples autólogo se mostrou eficaz no tratamento da fenda palatina, aliada aos cuidados adequados no pós-operatório.(AU)
The cleft palate is the communication between the oral and nasal cavity through an aperture in the palate, it's causes include an infinitude of factors: congenital, traumatic, mineral deficiency or hormonal. Examination of the oral cavity determines if the diagnosis and treatment is surgical. Correction in adult animals is performed with mucoperiosteal flap showing good results. However, surgical correction in puppies is more complicated with less favorable prognosis. This current work reports a case of an adult, female dog of undefined breed, with a history of secondary clef palate of traumatic origin in the soft palate due to bone ingestion. For correction, a biological membrane of bovine pericardium was used, but it was not successful, requiring a second surgical procedure performed with autologous simple mucoperiosteal flap. The last technique combined with adequate postoperative care was effective.(AU)
Asunto(s)
Animales , Femenino , Perros , Paladar Blando/lesiones , Colgajos Quirúrgicos/cirugía , Colgajos Quirúrgicos/veterinaria , Fisura del Paladar/cirugía , Fisura del Paladar/rehabilitación , Fisura del Paladar/veterinariaRESUMEN
Neste estudo foi implantado um retalho de membrana peritoneal bovina em substituição a um fragmento da face ventral da bexiga de coelhos albinos, raça Nova Zelândia, adultos, machos não-castrados (n=12), com o intuito de avaliar o processo de reparação tecidual no que se refere à biocompatibilidade, à capacidade de reparação tecidual e a possíveis complicações. Aos sete, 14, 30 e 60 dias de pós-operatório, os animais foram eutanasiados, três em cada período, mediante o emprego de tiopental sódico (200mg kg-1), para posterior avaliação macroscópica e análise histopatológica da interface do implante com o tecido nativo. Macroscopicamente, foram observadas, em todos os períodos, aderências de estruturas adjacentes ao local do implante, presença de cálculos e ausência de sinais de rejeição. Sob microscopia de luz, aos sete, 14 e 30 dias de observação, o implante ainda estava presente, havia intensa reação inflamatória mista, neovascularização, fibroplasia e escassas fibras musculares, contudo, o epitélio e a lâmina própria não estavam reconstituídos. Aos 60 dias de avaliação, o implante não estava mais presente e todas as camadas vesicais encontravam-se reparadas. O implante foi biocompatível e forneceu arcabouço para orientação e desenvolvimento das camadas teciduais da bexiga, mediante processos de reparação, restabelecendo a estrutura do órgão.
Bovine peritoneum was utilized to replace a section of ventral face of the bladder of New Zealand rabbits, adult and entire males (n=12) with the purpose of evaluating the tissue repair process in regard of its biocompatility, scar formation ability and possible complications. The animals were euthanized at 7, 14, 30 and 60 days post operative, three in each period, by the use of sodium thiopental (200mg kg-1), followed by macroscopic evaluation and histopathological analysis of the implant interface with the native tissue. Macroscopically it was observed, in all time periods, structure adherence to the implant site, presence of calculi and absence of rejection signs. Under light microscopy at the 7th, 14th and 30th observation days, the implant was present; a mixed intense inflammatory reaction could be observed, neovascularization, fiberplasic process and rare muscle fibers, however the epithelium and sheath weren't also reconstituted. At the 60th day of evaluation the implant wasn't anymore present and all vesicle layers were repaired. The implant was biocompatible and provided the mainframe for orientation and development of the tissue layers of the bladder, through repairing processes thus reestablishing the organ's structure.
Asunto(s)
Animales , Masculino , Conejos , Cistotomía/veterinaria , Glicerol , Colgajos Quirúrgicos/veterinaria , Conejos/cirugíaRESUMEN
PURPOSE: To verify whether pediculated diaphragmatic flaps were suitable to correct iatrogenic wounds in dog's esophagus injuries. METHODS: Seven dogs were submitted to resection of a segment of the esophagical wall, which was then corrected by suturing a pediculated diaphragm flap. Endoscopic evaluation of the esophagical wall was done forty days after the surgical procedure. RESULTS: Three animals died, one due to implant ischemia, caused by strangulation of the phrenic artery; other due to wound infection; and the last, due to mediastinitis. Scar retraction was observed, however, there was no stenosis, allowing the passage of a 9,8 mm probe with no difficulty. The limits between the implants and the native esophagus were indistinguishable, and the implant was covered by esophageal mucosa. CONCLUSION: The diaphragmatic flaps are suitable on the restoring of continuity in dog's thoracic esophagus.
OBJETIVO: Verificar se retalhos diafragmáticos pediculados seriam adequados para correção de defeitos iatrogênicos do esôfago do cão. MÉTODOS: Sete cães foram submetidos à ressecção de um segmento da parede esofágica, o qual foi corrigido por meio da sutura de um pedículo diafragmático pediculado. Um animal morreu devido à isquemia do implante causada pelo estrangulamento da artéria frênica, outro devido à infecção da ferida cutânea e outro devido a mediastinite. Aos 40 dias após o procedimento fez-se um exame endoscópico dos animais nos cães sobreviventes. RESULTADOS: Observou-se retração cicatricial sem repercutir em estenose, permitindo a passagem de sonda de 9,8 mm, sem dificuldade. Os limites entre os implantes e o esôfago nativo se apresentaram indistinguíveis e o implante estava recoberto por mucosa esofágica. CONCLUSÃO: Os retalhos diafragmáticos são adequados na restauração da continuidade do esôfago torácico do cão.
Asunto(s)
Animales , Perros , Diafragma/trasplante , Esofagoplastia/veterinaria , Colgajos Quirúrgicos/veterinaria , Endoscopía , Estenosis Esofágica/diagnóstico , Estenosis Esofágica/veterinaria , Esofagoplastia/efectos adversos , Cicatrización de HeridasRESUMEN
Se están investigando la ingeniería tisular y la terapia génica en estudios en animales para reconstruir el tejido peneano o tratar la disfunción eréctil. En esta revisión se pretende examinar estos esfuerzos experimentales de los últimos años y se intenta ofrecer una breve introducción a la metodología básica de estas nuevas técnicas del campo de la medicina regenerativa
Tissue engineering and gene therapy are currently investigated in animal studies for reconstructing penile tissue or treating erectile dysfunction. This review aims to ecamine these experimental efforts from the last years and tries to give a brief introduction to the basic methodology of these new techniques from the field of regenerative medicine
Asunto(s)
Conejos , Ratones , Animales , Medicina Regenerativa/métodos , Andrología/métodos , Ingeniería de Tejidos/métodos , Disfunción Eréctil/diagnóstico , Disfunción Eréctil/cirugía , Procedimientos Quirúrgicos Operativos/métodos , Colgajos Quirúrgicos/patología , Ingeniería Genética/métodos , Ingeniería Genética/veterinaria , Prótesis e Implantes , Pene/anomalías , Colgajos Quirúrgicos/veterinaria , Procedimientos Quirúrgicos Operativos/veterinaria , Pene/patología , Prótesis e Implantes/veterinaria , Oligonucleótidos/uso terapéutico , Potasio/uso terapéutico , Ingeniería de Tejidos/veterinaria , Vasodilatadores/uso terapéutico , Ácido Nítrico/uso terapéuticoRESUMEN
O hemangiopericitoma canino é uma neoplasia cutânea relativamente comum, que surge principalmente nos membros. As formas de terapia mais indicadas säo a amputaçäo; ressecçäo local e radioterapia, sendo freqüente a ocorrência de recidivas (GOLDSCHIMIDT & SHOFER,1992). Os registros de seis cäes atendidos no Serviço de Técnica Cirúrgica do Hospital Veterinário da Faculdade de Medicina Veterinäria da Universidade de Säo Paulo foram revisados no período de julho de 1994 a julho de 1996. Foram avaliados os dados referentes à formaçäo cutânea, técnica de retalho cutâneo utilizada, e evoluçäo pós-operatória dos animais. Os cäes pertenciam a diferentes raças, sendo três machos e três fêmeas com idade média de 9 anos. Em cinco cäes, as massas neoplásicas surgiram nos membros e, em um cäo, na regiäo perineal. As técnicas de retalhos cutâneos utilizadas foram a H-plastia (2), retalho por avanço pediculado simples (1), retalho por transposiçäo (2), e W-plastia (1). A cicatrizaçäo da pele levou de 10 a 15 dias com sobrevivência de 100 porcento do retalho em cinco cäes e 89 porcento do retalho em um cäo. Um dos animais veio a óbito 15 meses após a cirurgia devido a causas näo relacionadas à neoplasia. Näo ocorreu recidiva num intervalo que variou de 4 a 20 meses, desde a cirurgia até a presente data. A excisäo cirúrgica do hemangiopericitoma canino com amplas margens de segurança, parece ser uma forma de terapia eficiente, uma vez que näo ocorreram recidivas. O domínio das técnicas de retalhos cutâneos tem permitido tal procedimento, pois näo há o receio de näo se conseguir reconstruir os tecidos locais. A recuperaçäo dos animais é mais rápida e o custo é menor em relaçäo às outras formas de terapia.
Asunto(s)
Animales , Masculino , Femenino , Perros , Hemangiopericitoma/cirugía , Hemangiopericitoma/veterinaria , Colgajos Quirúrgicos/veterinaria , Trasplante de Piel/veterinariaRESUMEN
Este estudo foi realizado com o objetivo de avaliar, histologicamente, a reparaçäo dos tecidos periodontais, após a realizaçäo de retalho de espessura total reposto em áreas saudáveis. Quatro cäes sem raça definida foram usados neste experimento. Retalhos de espessura total foram realizados na regiäo do segundo pré-molar ao segundo molar mandibular direito e esquerdo. Os retalhos foram elevados apenas na face vestibular, sendo o lado lingual preservado (controle). As incisöes foram intra-sulculares; o retalho de espessura total foi elevado e permaneceu desta maneira por uma ou duas horas. A área cirúrgica foi mantida umedecida com soro fisiológico. Nenhum procedimento de instrumentaçäo foi realizado nas superfícies radiculares dos segundos pré-molares e segundos molares, e o retalho foi reposicionado e suturado. Os terceiros e quartos pré-molares e os primeiros molares foram usados em outro experimento. Os animais foram sacrificados nos tempos de 7 e 28 dias, e os espécimes dos segundos pré-molares e segundos molares foram submetidos à análise histológica. Os resultados revelaram que, do lado experimental, no tempo de 7 dias, o epitélio oral apresentava características semelhantes às do lado controle; o epitélio sulcular mostrava uma descontinuidade na porçäo mais apical, e o conjuntivo subjacente, a presença de infiltrado inflamatório intenso; as fibras colágenas encontravam-se aleatoriamente reinseridas, e a cortical externa da crista óssea, com discreta reabsorçäo superficial. Aos 28 dias, no lado experimental, o epitélio oral apresentou um aumento significativo da camada espinhosa; as células mais apicais do epitélio sulcular localizavam-se na junçäo cemento-esmalte. A crista óssea alveolar apresentou áreas de reabsorçäo e remodelaçäo óssea. Concluímos que a a elevaçäo de um retalho de espessura total sem instrumentaçäo radicular, em áreas de saúde periodontal, parece näo provocar perda de inserçäo e permite uma rápida reinserçäo