Correção de luxação valga da articulação rádio-cárpica em um cão através da reconstrução ligamentar com fio sintético: uma alternativa à artrodese / Correction of valgus dislocation of the radio-carpal joint in a dog through ligament reconstruction with synthetic wire: an alternative to arthrodesis

Background: Radio-carpal dislocations are normally related to situations of trauma and may be treated with open or closed reduction, reconstruction of injured structures or arthrodesis. The treatment aims to eliminate pain, abnormal joint movement and restore member functions, avoiding or minimizing the development of arthrosis. Notwithstanding the literature on the treatment options, few of them explain the restorative technical applications and their evolution in a later postoperative period. The aim of the present report is to discuss extra-articular joint reconstruction with nylon wire in a canine patient with radio-carpal joint dislocation and ligament rupture. Case: A 10-year-old mixed-breed bitch, weighing 10 kg, after an 8-meter fall, received care at Animal Care Barueri Clínica Veterinária. The animal presented left thoracic member functional impotence and radio-carpal joint valgus dislocation, pain and joint swelling. The patient was sedated and medium-lateral and dorso-palmar X-rays of the distal area of the thoracic member were performed, showing radio-carpal dislocation and a slight radiotransparent line in caudal cortical of the middle third of the left radium, possibly related to an incomplete fracture due to compaction. At this point, the choice was for a closed reduction performed by means of traction followed by internal rotation of the distal extremity of the member. An immobilization device was placed using a vinyl splint for 4 days, until the date of the surgery. For the surgical procedure, a dorso-medial access was opened in the left radio-carpal joint, restoring the short radium collateral joint with nylon 0 suture, anchored on 3 pathways opened in the bones (2 pathways in the radium and 1 in the carpo-radial bone), forming one knot. The subcutaneous tissue was closed and sutured using absorbable wire of 2-0 polyglycolic acid. The skin was sutured using nonabsorbable wire of 3-0 nylon. The immediate postoperative X-rays showed the pathways created, conservation of the bone structures and restoration of the anatomic axis of the radio-carpal joint. The member was again immobilized for 70 days and, 30 days after removal of the splint, the animal could already bear load over the member, without lameness. At 10 months after the surgery, the patient performed X-rays of the medium-lateral and dorso-palmar projections, showing absence of the signs of arthrosis or any joint impairment. There was also absence of lameness and pain, however with reduction in joint movement amplitude, with total extension but more limited flexion. Discussion: Through comparison with the literature it was possible to find similarities with the joint injury approach reported, mainly regarding the form of the suture and the clinical alterations observed, such as short radium collateral ligament rupture related to joint valgus deviation. The treatment strategy in the case combined temporary closed reduction of the joint, immobilization, later joint access and restoration with synthetic wire and long-term immobilization. The postoperative results obtained showed favorable evolution, without signs of joint degeneration, pain or lameness. Possible unwanted consequences related to arthrodesis make the options for reconstruction techniques seem more interesting; however, further information of their application and the combination of its variations in a more directed fashion are still required. Understanding the types of injuries, together with the development of research that assess their diagnosis and evolution, may help treatments to show even better perspectives.

Congenital elbow luxation grade I treated by radial head ostectomy in an English Bulldog / Luxação congênita de cotovelo grau I tratada por ostectomia da cabeça do rádio em um Bulldog Inglês

The aim of this study is to report a long term follow up of a congenital luxation of the radial head (CLRH) case of a young Bulldog treated by radio head ostectomy (RHO). CLRH is an uncommon condition in dogs, but it is the most commom form of elbow dislocation (grade I). An English Bulldog, male, 6 months, 14 kilograms, was suspected of elbow dislocation. Physical examination revealed a lateral proeminence on the lateral surface of the right elbow, as well as grade I lameness and mild pain. Range of motion was normal. Previous radiographs and tomography confirmed CLHR. RHO was chosen instead of corrective techniques, due to the age of the animal at the time of the procedure and the difficulty in repositioning the radial head in the joint. Three and a half years after surgery, new clinical and radiographic examaminations were performed. The patient had no pain, good limb support and good range of motion, allowing good elbow movement. There was a partial regrowth of the proximal segment of the radial head causing better readjustment of it in the joint. Mild signs of joint degeneration were present. RHO proved to be effective in this case, proving to be a good technique to be used in cases of CLRH when conservative treatment or reduction techniques can no longer be used.

O objetivo deste relato foi o de apresentar o acompanhamento tardio de um caso de luxação congênita de cabeça de rádio (LCCR) em um Buldog Inglês jovem, tratada por ostectomia da cabeça radial (OCR). A LCCR é uma condição incomum nos cães, mas é a forma mais comum de luxação de cotovelo nos mesmos (grau I). Um Bulldog Inglês, macho, 6 meses, 14 quilos, foi atendido com suspeita de luxação do cotovelo. Exame físico revelou uma proeminência na superfície lateral do cotovelo direito, além de claudicação grau I e dor leve. Amplitude de movimento apresentava-se normal. Radiografias e tomografia prévias confirmaram LCCR. Optou-se pela OCR ao invés de técnicas corretivas, devido à idade do animal à época do procedimento e à dificuldade no reposicionamento do rádio na articulação. Após 3 anos e meio de pós-operatório, foram realizados novos exames clínicos e radiográficos. O paciente não apresentava dor, apresentava bom apoio do membro e boa amplitude de movimento, permitindo bom movimento do cotovelo. Houve um novo crescimento parcial do segmento proximal da cabeça do rádio ocasionando melhor readequamento do mesmo na articulação. Sinais leves de degeneração articular estavam presentes. A OCR se mostrou efetiva neste caso, provando ser uma boa técnica a ser utilizada nos casos de LCCR quando tratamento conservativo ou técnicas de redução já não podem ser mais utilizados.

Congenital elbow luxation grade I treated by radial head ostectomy in an English Bulldog / Luxação congênita de cotovelo grau I tratada por ostectomia da cabeça do rádio em um Bulldog Inglês

O objetivo deste relato foi o de apresentar o acompanhamento tardio de um caso de luxação congênita de cabeça de rádio (LCCR) em um Buldog Inglês jovem, tratada por ostectomia da cabeça radial (OCR). A LCCR é uma condição incomum nos cães, mas é a forma mais comum de luxação de cotovelo nos mesmos (grau I). Um Bulldog Inglês, macho, 6 meses, 14 quilos, foi atendido com suspeita de luxação do cotovelo. Exame físico revelou uma proeminência na superfície lateral do cotovelo direito, além de claudicação grau I e dor leve. Amplitude de movimento apresentava-se normal. Radiografias e tomografia prévias confirmaram LCCR. Optou-se pela OCR ao invés de técnicas corretivas, devido à idade do animal à época do procedimento e à dificuldade no reposicionamento do rádio na articulação. Após 3 anos e meio de pós-operatório, foram realizados novos exames clínicos e radiográficos. O paciente não apresentava dor, apresentava bom apoio do membro e boa amplitude de movimento, permitindo bom movimento do cotovelo. Houve um novo crescimento parcial do segmento proximal da cabeça do rádio ocasionando melhor readequamento do mesmo na articulação. Sinais leves de degeneração articular estavam presentes. A OCR se mostrou efetiva neste caso, provando ser uma boa técnica a ser utilizada nos casos de LCCR quando tratamento conservativo ou técnicas de redução já não podem ser mais utilizados.(AU)

The aim of this study is to report a long term follow up of a congenital luxation of the radial head (CLRH) case of a young Bulldog treated by radio head ostectomy (RHO). CLRH is an uncommon condition in dogs, but it is the most commom form of elbow dislocation (grade I). An English Bulldog, male, 6 months, 14 kilograms, was suspected of elbow dislocation. Physical examination revealed a lateral proeminence on the lateral surface of the right elbow, as well as grade I lameness and mild pain. Range of motion was normal. Previous radiographs and tomography confirmed CLHR. RHO was chosen instead of corrective techniques, due to the age of the animal at the time of the procedure and the difficulty in repositioning the radial head in the joint. Three and a half years after surgery, new clinical and radiographic examaminations were performed. The patient had no pain, good limb support and good range of motion, allowing good elbow movement. There was a partial regrowth of the proximal segment of the radial head causing better readjustment of it in the joint. Mild signs of joint degeneration were present. RHO proved to be effective in this case, proving to be a good technique to be used in cases of CLRH when conservative treatment or reduction techniques can no longer be used.(AU)

Congenital elbow luxation grade I treated by radial head ostectomy in an English Bulldog / Luxação congênita de cotovelo grau I tratada por ostectomia da cabeça do rádio em um Bulldog Inglês

O objetivo deste relato foi o de apresentar o acompanhamento tardio de um caso de luxação congênita de cabeça de rádio (LCCR) em um Buldog Inglês jovem, tratada por ostectomia da cabeça radial (OCR). A LCCR é uma condição incomum nos cães, mas é a forma mais comum de luxação de cotovelo nos mesmos (grau I). Um Bulldog Inglês, macho, 6 meses, 14 quilos, foi atendido com suspeita de luxação do cotovelo. Exame físico revelou uma proeminência na superfície lateral do cotovelo direito, além de claudicação grau I e dor leve. Amplitude de movimento apresentava-se normal. Radiografias e tomografia prévias confirmaram LCCR. Optou-se pela OCR ao invés de técnicas corretivas, devido à idade do animal à época do procedimento e à dificuldade no reposicionamento do rádio na articulação. Após 3 anos e meio de pós-operatório, foram realizados novos exames clínicos e radiográficos. O paciente não apresentava dor, apresentava bom apoio do membro e boa amplitude de movimento, permitindo bom movimento do cotovelo. Houve um novo crescimento parcial do segmento proximal da cabeça do rádio ocasionando melhor readequamento do mesmo na articulação. Sinais leves de degeneração articular estavam presentes. A OCR se mostrou efetiva neste caso, provando ser uma boa técnica a ser utilizada nos casos de LCCR quando tratamento conservativo ou técnicas de redução já não podem ser mais utilizados.

The aim of this study is to report a long term follow up of a congenital luxation of the radial head (CLRH) case of a young Bulldog treated by radio head ostectomy (RHO). CLRH is an uncommon condition in dogs, but it is the most commom form of elbow dislocation (grade I). An English Bulldog, male, 6 months, 14 kilograms, was suspected of elbow dislocation. Physical examination revealed a lateral proeminence on the lateral surface of the right elbow, as well as grade I lameness and mild pain. Range of motion was normal. Previous radiographs and tomography confirmed CLHR. RHO was chosen instead of corrective techniques, due to the age of the animal at the time of the procedure and the difficulty in repositioning the radial head in the joint. Three and a half years after surgery, new clinical and radiographic examaminations were performed. The patient had no pain, good limb support and good range of motion, allowing good elbow movement. There was a partial regrowth of the proximal segment of the radial head causing better readjustment of it in the joint. Mild signs of joint degeneration were present. RHO proved to be effective in this case, proving to be a good technique to be used in cases of CLRH when conservative treatment or reduction techniques can no longer be used.

Ocorrência simultânea de teratoma ovariano e hiperplasia endometrial cística com piometra em cadela Labrador Retriever / Simultaneous occurrence of ovarian teratoma and endometrial cystic hyperplasia with pyometra in a Labrador Retriever bitch

Background: Ovarian teratoma is a rare tumor that occurs in dogs. Its origin comes from embryonic cells of the notochord and it is a unipotent tumor. Pyometra is the accumulation of purulent content in the uterine lumen. Cystic endometrial hyperplasia is one of the factors predisposing a dog to the development of pyometra. The safest and most efficient treatment for pyometra is ovariohysterectomy. The purpose of this report was to describe a case of ovarian teratoma and cystic endometrial hyperplasia with concomitant pyometra in a Labrador Retriever Bitch. Case: A 10-year-old bitch Labrador Retriever, weighing 42 kg, was evaluated at Animal Care Barueri Veterinary Clinic, in Barueri, São Paulo. The patient was referred from another veterinary service to our clinic for an ovariohysterectomy and removal of an intestinal foreign body as previous ultrasonography (US) had indicated the presence of pyometra and a foreign body in the descending colon (she had ingested cloth according to the owner's report). Laboratory tests, complete blood count, alanine aminotransferase, alkaline phosphatase, urea, and creatinine levels did not show any significant changes. Upon examination, the clinical signs were mucopurulent vaginal discharge, 5% dehydration, rectal temperature 39.1°C, mild abdominal pain on palpation, normophagy, normodipsia, and normal defecation and urination. Laboratory tests and a new US were requested on which the uterus was observed with the presence of luminal anechoic content and increased uterine diameter (uterine horns 3.97 cm), an acoustic intestinal shadow supposedly from a foreign body, and on the leukogram, leukocytosis (23,600/mm3) due to neutrophilia with a right shift (20,532/mm3) was observed. Therapeutic ovariohysterectomy and exploratory celiotomy were chosen as therapeutic options. Celiotomy with caudoumbilical mid ventral access was performed. When the left uterine horn was identified, an attempt was made to pull it in order to expose the left ovary, but this maneuver was not successful. For this reason, the abdominal incision was enlarged cranially. At that point, a huge mass was observed in the ovary (which was supposedly the acoustic shadow of the foreign body in the descending colon/left ovary). The intestines appeared normal. Macroscopically, the mass had an irregular surface, round shape, firm consistency, and was 15 cm long x 10 cm wide. Once removed, the mass was incised in the transversal direction, purulent content, hair, and mineralized areas inside it were observed. Histopathological examination showed neoplastic proliferation, consisting of cells with elongated epithelioid shape that were arranged in long irregular bundles among well-differentiated adipose tissue. An exuberant eosinophilic matrix with extensive cystic areas filled with lamellar keratin and hairy stems covered by squamous epithelium was also observed. Extensive areas exhibiting nervous tissue with minimal atypia are shown. The morphological picture was compatible with teratoma. Discussion: The present report describes the concomitant presence of ovarian teratoma and pyometra in a dog. The diagnosis of pyometra requires complementary tests (laboratory and imaging). The intestinal acoustic shadow observed on the two US images obtained by two different professionals was suggestive of intestinal foreign body but was also a wrong diagnosis, which was confirmed after an exploratory celiotomy when the mass in the left ovary was identified. On the histopathological examination of this present case, epithelial, nervous, and cartilaginous tissues were observed. This differentiation of tissues corroborated the teratoma diagnosis. Thus, the importance of an accurate diagnosis contributes to the resolution of a surgical conditions that may have had a poor prognosis when the procedure took a longer time to perform.(AU)

Occurrence of Capillaria sp. in the liver of sheep (Ovis aries ) in a slaughterhouse in the state of Acre, Brazil / Ocorrência de Capillaria sp. em fígado de ovino ( Ovis aries) em um abatedouro no estado do Acre, Brasil

Although sheep farming has grown in the state of Acre over the past four decades, little is known about occurrences of helminthiases in the herds of this region. The objective of the study was to assess the occurrences of non-intestinal helminthiasis among sheep slaughtered in Rio Branco. A total of 110 sheep livers were inspected from two slaughter batches (july 2014 and march 2015) in a slaughterhouse in Rio Branco. Livers with macroscopic lesions were photographed and were then subjected to histopathological analysis under an optical microscope. The macroscopic lesions showed small nodes with inflammatory characteristics and areas of fibrosis, which appeared to be calcified, thus suggesting a granulomatous reaction. Of the 110 evaluated livers, we noticed 110 nodules in total; these nodules have an average size of 0.5 cm. The histopathological analysis showed alterations to the architecture of the hepatic lobe, with multiple foci of necrosis and polymorphonuclear cells. Two samples revealed the presence of helminths from Nematode class and Capillaria sp. eggs identified by the typical morphology and morphometry. This seems to be the first report of Capillaria sp. in sheep livers in Brazil, and it serves as an important alert regarding animal health surveillance and control and regarding the Capillaria sp. zoonotic role in humans.(AU)

Embora a ovinocultura tenha despertado o interesse de criadouros no estado do Acre nas últimas quatro décadas, pouco se conhece sobre a ocorrência de helmintoses no plantel de ovinos dessa região. O objetivo do presente estudo foi avaliar a possibilidade de ocorrência de helmintíases não intestinais entre ovinos abatidos no município de Rio Branco. Foram inspecionados 110 fígados de ovinos em dois abates (julho de 2014 e março de 2015) em um abatedouro no município de Rio Branco. Fígados com lesões macroscópicas foram fotografados com posterior análise histopatológica por microscopia de luz. Nas lesões macroscópicas foram encontrados pequenos nódulos apresentando características inflamatórias com áreas de fibrose, aparentemente calcificadas, sugerindo uma reação granulomatosa. Dos 110 fígados avaliados, observou-se 110 nódulos no total; estes nódulos têm um tamanho médio de 0,5 cm. A análise histopatológica mostrou alterações na arquitetura do lóbulo hepático, com múltiplos focos de necrose, além da formação de abscessos hepáticos constituídos por polimorfonucleares. Duas amostras revelaram a presença de helmintos da Classe Nematoda e ovos de Capillaria sp. identificados pela morfologia típica e morfometria. Esse resultado parece ser o primeiro registro de Capillaria sp. em fígado de ovino no Brasil, o que é um importante alerta para a vigilância no controle sanitário animal e o seu papel zoonótico para humanos.(AU)

Avaliação clínica de cães submetidos à parada circulatória total por diferentes períodos de tempo através da técnica de Inflow Occlusion / Clinical evaluation of dogs submitted to circulatory arrest for different periods of time by Inflow Occlusion

A técnica de "Inflow Occlusion" pode ser utilizada em cirurgias cardíacas quando se pretende manter o coração aberto apenas por alguns minutos, para realização de pequenos reparos. No entanto, a parada circulatória total (PCT), evento decorrente da técnica em questão, pode acarretar severas alterações metabólicas e neurológicas ao paciente. Neste estudo foram utilizados 12 cães sem raça definida, os quais foram divididos em dois grupos, A e B, sendo os mesmos submetidos a 7 e 8 minutos de PCT, respectivamente, utilizando-se da técnica de "Inflow Occlusion". Tentou-se estabelecer normotermia durante os procedimentos cirúrgicos. Avaliações clínica e comportamental foram realizadas nos dois grupos após os procedimentos cirúrgicos e dados bioquímicos foram coletados para comparação entre os períodos pré e pós-operatórios. Ocorreram dois óbitos transoperatórios no grupo B. Alterações clínicas transitórias foram observadas no grupo A até o momento M7 (48 horas após cirurgia), e no grupo B, as mesmas foram mais intensas e presentes mesmo após M7; e em um animal do grupo B foi observada cegueira permanente por todo o período de acompanhamento. Apesar das alterações observadas, há indícios que seja seguro realizar a técnica de "Inflow Occlusion" por até 7 minutos, sendo contra-indicada, no entanto, para períodos mais prolongados.(AU)

"Inflow Occlusion" technique can be used in heart surgeries when heart is required to be opened just for few minutes, to allow quick repairs. However, circulatory arrest, event occasioned by this technique, may produce serious metabolic and neurological consequences to the patient. In this study, 12 mongrel dogs were used, divided into two groups, A and B, which were submitted to 7 and 8 minutes of total circulatory arrest, respectively, using "Inflow Occlusion" technique. Normothermia was tried during surgical procedures. Clinical and behavior evaluation were performed after surgery to both groups, and biochemical data were collected to compare pre and post-operatory moments. There were two transoperatory deaths in Group B. Transitory clinical problems were observed in group A until moment M7 (48 hours after surgery), and in Group B these problems were more intense and seen even after M7; and permanent blindness in one animal of Group B was present during all follow up period. Despite all alterations found during the study, it might be safe to use "Inflow Occlusion" technique for periods up to 7 minutes, however, it is contra-indicated for longer periods.(AU)

Reproductive behavior in the annual fish Austrolebias reicherti Loureiro & García 2004 (Cyprinodontiformes: Rivulidae)

Annual fishes inhabit temporary ponds that dry out seasonally and the adaptations to survive this extreme condition include high metabolic rates and an elaborate courtship behavior which ends in the deposition of drought-resistant eggs, capable of going through diapause stages in the substrate. The pronounced sexual dimorphism that these fishes show suggests that sexual selection could play a key role in the differentiation, speciation and evolution of this diverse group of fishes. However, there is scarce information about their reproductive isolation mechanisms, including detailed analysis of courtship signals. Herein, we analyzed, qualitatively and quantitatively, the reproductive behavior of Austrolebias reicherti. The behavioral units recognized in this study correspond with the previous analysis of other species of annual fishes. The most frequent unit in males was the lateral display where specific morphological and coloration patterns are displayed to the female. The female's high relative frequency and time of quietness suggest that this unit may have an evaluation role during courtship. In addition to visual displays during courtship, males perform vibrations of the dorsal and anal fins as well as body undulations; these indicate that mechanical signals may be important for attracting females. Our results support the hypothesis of multimodal signals. The conservation of behavioral patterns in courtship displays within Austrolebias suggests that species-level recognition and the barrier to hybridization may not occur at this stage, unless quantitative differences can be identified.(AU)

Os peixes anuais habitam charcos temporários que secam sazonalmente, e as adaptações para sobreviver a estas condições extremas incluem altas taxas metabólicas e um elaborado comportamento de cortejo, que culmina com a deposição de ovos resistentes à dessecação dentro do substrato, os quais são capazes de atravessar estádios de diapausa. O pronunciado dimorfismo sexual apresentado por estes peixes indica que a seleção sexual poderia estar exercendo um papel chave na diferenciação, especiação e evolução deste grupo diverso de peixes. Entretanto, informações acerca dos mecanismos de isolamento reprodutivo, incluindo uma análise detalhada dos sinais de cortejo, são escassas. Neste artigo é analisado o comportamento reprodutivo de Austrolebias reicherti de maneira qualitativa e quantitativa. As unidades comportamentais utilizadas neste estudo correspondem àquelas incluídas em análises anteriores de outras espécies de peixes anuais. A unidade comportamental mais freqüentemente observada em machos foi a "exibição lateral", onde características espécie-específicas da morfologia e colorido são exibidas para a fêmea. A alta proporção de ocorrência (em freqüência e tempo) do comportamento de "quietude" nas fêmeas indica que o mesmo poderia desempenhar um papel avaliativo durante o cortejo. Outros sinais além dos visuais estão envolvidos no cortejo dos peixes anuais; os machos vibram as nadadeiras dorsal e anal e ondulam o corpo, o que indica que os sinais mecânicos poderiam ter influência na atração das fêmeas. Estes resultados conferem suporte à hipótese de sinais multimodais, recentemente proposta. Os movimentos de cortejo altamente conservados dentro de Austrolebias indicam que o reconhecimento específico e a barreira à hibridização poderiam não ocorrer nesta etapa, a menos que se encontrem diferenças quantitativas nestes sinais comportamentais.(AU)

Parada circulatória total em cães por diferentes períodos de tempo através da técnica de \"Inflow Occlusion\". Avaliação clínica e hemogasométrica / Total circulatory arrest in dogs for different periods of time using \"Inflow Occlusion\" technique. Clinical and hemogasometric evaluation

A técnica de \"Inflow Occlusion\" pode ser utilizada em cirurgias cardíacas quando se pretende manter o coração aberto apenas por alguns minutos, para realização de pequenos reparos. No entanto, a parada circulatória total, evento decorrente da técnica em questão, pode acarretar severas alterações metabólicas e neurológicas, sendo necessária monitorização trans e pósoperatória do paciente. Neste estudo foram utilizados 12 cães sem raça definida, os quais foram divididos em dois grupos, A e B, submetidos a 7 e 8 minutos de parada circulatória total, respectivamente, utilizando-se da técnica de \"Inflow Occlusion\". Tentou-se estabelecer normotermia dos animais durante os procedimentos cirúrgicos. Foram realizados exames hemogasométricos, e avaliações clínica e neurológica nos momentos preconizados. Alterações neurológicas transitórias foram observadas em ambos os grupos. Ocorreram dois óbitos transoperatórios no grupo B, e um animal do mesmo grupo apresentou cegueira permanente no período pós-operatório. Apesar da acidose metabólica observada durante os procedimentos, o pH, pressão parcial de dióxido de carbono no sangue arterial, e bicarbonato plasmático arterial de ambos os grupos, retornaram aos valores normais após trinta minutos da parada circulatória. Apesar das alterações observadas, é lícito afirmar que o \"Inflow Occlusion\" é seguro por até 7 minutos. Após este período, no entanto, é contra-indicado, segundo resultados obtidos e óbitos transoperatórios relatados

\"Inflow Occlusion\" technique can be used in heart surgeries when heart is required to be opened just for few minutes, to allow quick repairs. However, circulatory arrest, event occasioned by this technique, can produce serious metabolic and neurologic consequences to the patient, and monitorization on trans, and postoperatory moments is well recommended. In this study, 12 mongrel dogs were used, and were divided into two groups, A and B, submmited to 7 and 8 minutes of total circulatory arrest, respectively, using \"Inflow Occlusion\" technique. Normothermia was tried during surgical procedures. Hemogasometric analysis, and clinical and neurological exams were made, each of them, on the moments established for the experiment. There were some transitory neurological problems related to both groups. There were two transoperatory deaths in group B and one case of permanent blindness in the same group, on postoperatory period. Despite metabolic acidosis occurred during procedures, pH values, arterial dioxide carbon parcial pressure, and arterial plasmatic bicarbonate related to both groups, returned to basal levels thirty minutes after surgery. Even occuring some hemogasometric and neurologic alterations, we can say that \"Inflow Occlusion\" is safe for periods up to 7 minutes. After this period of time, however, it is contraindicated, as seen after these results and because transoperatory deaths