Jogo didático para ensinar ciências com imagens para alunos cegos com auxílio da audiodescrição

Este trabalho é resultado de uma pesquisa de mestrado realizada com a intenção de desenvolver uma metodologia de ensino de ciências para alunos cegos e teve o objetivo de potencializar o processo de comunicação e construção do conhecimento.  Dessa forma, construiu-se um jogo denominado de BOCA-GAME (BOCA= Biblioteca de Objetos Comunitários em Audiodescrição; GAME= jogo), feito com material de fácil acesso e baixo custo. A tecnologia apresenta escrita braille em todas as partes do jogo a fim de promover a acessibilidade. Há também disponível para os jogadores os áudios de audiodescrições (AD) feitas dos objetos do jogo armazenados em um notebook, no formato MP3. Foram realizados três pré-testes de validação com voluntários e, diante disso, percebeu-se a necessidade de difundir esse recurso, afinal, descobriu-se que todos os participantes não conheciam o recurso de audiodescrição, o que dificultou o desenvolvimento das partidas, apesar de os mesmos terem compreendido sua dinâmica. Dessa forma, para que os educadores tenham condições de ensinar ciências com imagens para alunos cegos com o auxílio desse recurso, torna-se necessário difundí-lo nas escolas, espaço difusor do conhecimento

INDICAÇÕES DE OVARIOHISTERECTOMIA TERAPÊUTICA EM GATAS

Ovariohysterectomy (OH) is the most performed surgical procedure in the veterinary routine. Such surgery can be carried out as a treatment for diseases, being called therapeutic OH. Thus, the present review aims to determine the indications for therapeutic OH in cats. For this purpose, a search was carried out on scientific article websites using terms related to the topic, covering the period from 2012 to 2022 (10 years). The articles on the indication of therapeutic OH in cats were analyzed and the data obtained were arranged in a table and graph. Twenty-seven publications were analyzed, totaling 1,264 cases of therapeutic OH in cats. Pyometra was the most frequent disease, totaling 1,010 cases (79.90%). Ovarian cyst was the second most frequent cause, comprising 95 cases (7.51%). The third most frequent cause of therapeutic HO was dystocia, representing 81 cases (6.40%). Breast hyperplasia was an indication for therapeutic OH in 30 cases (2.37%). Uterine prolapse and uterine torsion had the same frequency (11 cases; 0.87%). Fetal maceration was a therapeutic indication in three reports (0.23%) in the analyzed articles. There were ten other less common indications of therapeutic OH in cats. Thus, the results indicate pyometra as the most frequent disease; however, few articles were found on the subject, indicating the need for more studies involving the feline species.Ovariohisterectomia (OH) é o procedimento cirúrgico mais realizado na rotina veterinária. Tal cirurgia pode ser realizada como tratamento de enfermidades, sendo denominada de OH terapêutica. Assim, o objetivo desta revisão é determinar quais as indicações de OH terapêutica em gatas. Para isso, foi realizada uma busca em sites de artigos científicos utilizando-se termos relacionados ao tema, abrangendo o período de 2012 a 2022 (10 anos). Os artigos sobre indicação de OH terapêutica em gatas foram analisados e os dados obtidos foram dispostos em tabela e gráfico. Foram analisadas 27 publicações, perfazendo 1.264 casos de OH terapêutica em gatas. Piometra foi a enfermidade mais frequente, totalizando 1.010 casos (79,90%). Cisto ovariano foi a segunda causa mais frequente, compreendendo 95 casos (7,51%). A terceira causa mais frequente de OH terapêutica foi a distocia, representando 81 casos (6,40%). A hiperplasia mamária foi indicação de OH terapêutica em 30 casos (2,37%). Prolapso uterino e torção uterina obtiveram a mesma frequência (11 casos; 0,87%). Maceração fetal foi uma indicação terapêutica em três relatos (0,23%) nos artigos analisados. Ocorreram dez outras indicações menos comuns de OH terapêutica em gatas. Desta forma, os resultados indicam a piometra como a doença mais frequente, entretanto, foram encontrados poucos artigos sobre o tema, indicando a necessidade de mais estudos envolvendo a espécie felina

Liver Cysts in a Kitten with Platynosomum sp.

Background: Hepatic cysts are rarely described in association with infections by Platynosomum sp. Infected animals are most often asymptomatic, and the severity of symptoms is associated with the number of biliary tract parasites, which may lead to cholangitis and cholangiohepatitis. Although platinosomiasis is often associated with cholangitis and cholangiohepatitis, it rarely is with polycystic disease. For the parasite’s life cycle to occur, the infected cat must eliminate the eggs in the feces and three intermediate hosts are needed: snails, terrestrial isopods and vertebrates like the frog or the gecko. The eggs are ingested by the snails, then the miracids are released and matured into the mother sporocyst form, which originates child sporocysts containing the cercariae, that leave the mollusks for the soil and are ingested by the terrestrial isopod in which the cercariae matures until metacercariae. Vertebrates ingest terrestrial isopods and are ingested by felines. The present study aimed to report an unusual case of platinosomiasis with the development of multiple hepatic cysts.Case: A mixed breed male kitten was admitted with a history of apathy, hyporexia, increased abdominal volume and jaundice. In the ultrasound examination, we could see hepatomegaly and several hypoecogenic rounded structures, similar to cysts. There was an increase of serum concentration of the hepatic enzymes alanine transaminase and gamma glutamyl transferase enzyme. The parasite’s eggs were investigated in the patient’s feces using the simple sedimentation method, with a negative result. The animal was submitted to celiotomy and it was possible to observe several cystic structures in the liver. The cysts content was sent to cytology and culture. Cytology result was compatible with liver cyst and there was no bacterial growth in the culture. Bile fluid was collected and sent for Platynosomum sp. research using the centrifugal sedimentation test in formalin-ether solution, which allowed the parasite’s eggs to be observed. The cat was treated with praziquantel,silymarin, S-Adenosyl methionine, and ursodeoxycholic acid. The patient gradually improved from jaundice and there was a reduction in abdominal volume. Discussion: This report describes a case of platinossomiasis associated with polycystic liver disease in a domestic cat, which seems to be an uncommon presentation. Most infected cats are asymptomatic, but some animals may exhibit anorexia, apathy, increased abdominal volume due to hepatomegaly and/or ascitis and jaundice. Although infestation in domestic cats is relatively common, its association with liver cysts is rare or poorly reported in the literature, representing a diagnostic challenge, which makes mandatory the inclusion of this differential diagnosis in polycystic liver diseases in cats. The diagnosis of this parasitosis can be made based on the association among clinical signs, laboratory tests and ultrasound examination, but the definitive diagnosis is usually made by visualizing the parasite’s eggs. In the case described, it was not possible to observe parasite’s eggs in the patient’s feces, but in the bile. Platynosomum sp. infection should always be considered as a differential diagnosis in cases of polycystic liver disease in cats, especially in countries with tropical or subtropical climate. Early diagnosis and appropriate treatment were fundamental for the improvement of the patient’s clinical condition.Keywords: feline, liver, platinosomiasis, polycystic disease, jaundice, cystic lesions

ZOONOSES PARASITÁRIAS ORIUNDAS DE FEZES DE CÃES NO BRASIL

The growing number of companion animals, especially in large cities, has narrowed the contact between these animals and man, increasing human exposure to agents of zoonoses. The incidence of parasitic zoonoses is frequent in dogs. Among the parasitary zoonoses are Giardiasis, Dipilidiosis, Cryptosporodiosis, Toxocariasis, cutaneous larva migrans, ocular larva migrans, and visceral larva migrans. The aim of this study was to conduct a literature review of these zoonoses transmitted by dog feces in Brazil. A search was performed in scientific academic journals available online and in print, with the following indexing terms: parasitary zoonoses and intestinal parasites in dogs. Articles published from 1958 to 2021 were included in the study. Based on these articles, the different data related to the main parasitic zoonoses in dogs, etiology, form of transmission, and treatment were gathered and compared.O crescente número de animais de companhia, principalmente nos grandes centros, tem estreitado o contato entre esses e o homem, aumentando a exposição humana a agentes de zoonoses. A incidência de zoonoses parasitárias é frequente em cães. Entre as zoonoses parasitárias estão: Giardíase, Dipilidiose, Criptosporodiose, Toxocaríase, Larva migrans cutânea, Larva migrans ocular e Larva migrans visceral. Diante do exposto, o objetivo deste estudo foi realizar uma revisão de literatura dessas zoonoses transmitidas por fezes de cães no Brasil. Foi realizada, para isso, uma busca em revistas acadêmicas científicas disponíveis on-line e impressas, com os seguintes termos de indexação: zoonoses parasitárias e parasitos intestinais em cães; sendo incluídos no estudo artigos publicados a partir de 1958 até 2021. Dessa forma, foram reunidos e comparados os diferentes dados encontrados nas fontes de consulta e listadas as principais zoonoses parasitárias em cães, além de etiologia, forma de transmissão e tratamento

Acute Erythroid Leukemia in a Cat Infected with Feline Leukemia Virus

Background: Erythroid leukemia is a myeloproliferative hematopoietic disorder considered acute when there is a predominance of blasts in the bone marrow. It is frequently reported in cats infected with feline leukemia virus, but it is unclear whether this virus is involved in the oncogenesis. The clinical signs in cats are anorexia, apathy, weight loss, with evolution from two weeks to two months, pale mucous membranes, hemorrhages, ascites, salivation, and dyspnea due to pleural effusion. This affection responds little to chemotherapy with an unfavorable prognosis. The aim of this study is to report a case of a feline leukemia virus infected cat with the onset of severe hemolytic anemia. Case: A 8-year-old male mixed breed cat was attended with a history of anorexia, oligodipsia, apathy, progressive weight loss, and yellowish color of urine for 7 days. Laboratorial exams showed anemia (with metarubricytes, acanthocytes and ghost cells), leukocytosis and FeLV reagent test. The cat underwent treatment with methylprednisolone acetate and supportive care. One day later, the animal returned with icteric mucous membranes, and emesis. A blood count was performed that found worsening anemia, increased leukocytosis, and lymphocytosis. Abdominal ultrasound showed cholangiohepatitis and lymphadenomegaly in mesenteric lymph nodes. Mycoplasmosis associated with cholangiohepatitis and lymphoma were suspected. Treatment was started with ondansetron, metronidazole, and amoxicilin with potassium clavulanate. The cat returned after 3 days and laboratorial exams revealed worsening of blood parameters, so blood transfusion was performed. After 2 days, the patient started with dyspnea and hypothermia, that evolved to cardiorespiratory arrest. The body was sent to necropsy and histopathology, where blast cells and rubricytes were found in blood vessels of various organs. The bone marrow was markedly cellular with complete disappearance of adipose tissue. Most of the cells were blasts with abundant and eosinophilic cytoplasm, central nucleus with finely dotted chromatin and a large nucleolus. There were rubricytes, which made possible to confirm acute erythroid leukemia as a morphological diagnosis. Discussion: This cat was initially with feline stomatitis gingivitis complex, and after the results of the first tests, the suspicion of hemotropic mycoplasmosis and lymphoma was raised. The clinical signs observed in acute erythroid leukemia are lethargy, inappetence, fever, splenomegaly, mild lymphadenomegaly, associated with leukocytosis, severe anemia, and thrombocytopenia. The reported animal presented signs similar to those described in the literature except that there was no change in platelet counts. The diagnosis of leukemia was reached after histopathology, and it is made when is observed more than 30% of myeloblasts and monoblasts together or when the blast cells count including rubriblasts is greater than 30%. Although chemotherapy, the prognosis is usually poor. It is essential to perform the myelogram for the diagnosis of myeloid leukemias in vivo. In this report, we only achieve final diagnosis after the cat’s death, due to the aggressive behavior of the disease. Clinicians must be aware of the likely development of acute erythroid leukemia whenever a feline leukemia virus infected cat presents hemolytic anemia to get an early diagnosis, since this is an extremely aggressive disease, to propose prompt chemotherapy and give the patient a longer survival period.                                                            Keywords: hematopoietic disorders, hemolytic anemia, FeLV, leukemia, myeloneoplastic syndrome

Liver Cysts in a Kitten with Platynosomum sp.

Background: Hepatic cysts are rarely described in association with infections by Platynosomum sp. Infected animals are most often asymptomatic, and the severity of symptoms is associated with the number of biliary tract parasites, which may lead to cholangitis and cholangiohepatitis. Although platinosomiasis is often associated with cholangitis and cholangiohepatitis, it rarely is with polycystic disease. For the parasite’s life cycle to occur, the infected cat must eliminate the eggs in the feces and three intermediate hosts are needed: snails, terrestrial isopods and vertebrates like the frog or the gecko. The eggs are ingested by the snails, then the miracids are released and matured into the mother sporocyst form, which originates child sporocysts containing the cercariae, that leave the mollusks for the soil and are ingested by the terrestrial isopod in which the cercariae matures until metacercariae. Vertebrates ingest terrestrial isopods and are ingested by felines. The present study aimed to report an unusual case of platinosomiasis with the development of multiple hepatic cysts.Case: A mixed breed male kitten was admitted with a history of apathy, hyporexia, increased abdominal volume and jaundice. In the ultrasound examination, we could see hepatomegaly and several hypoecogenic rounded structures, similar to cysts. There was an increase of serum concentration of the hepatic enzymes alanine transaminase and gamma glutamyl transferase enzyme. The parasite’s eggs were investigated in the patient’s feces using the simple sedimentation method, with a negative result. The animal was submitted to celiotomy and it was possible to observe several cystic structures in the liver. The cysts content was sent to cytology and culture. Cytology result was compatible with liver cyst and there was no bacterial growth in the culture. Bile fluid was collected and sent for Platynosomum sp. research using the centrifugal sedimentation test in formalin-ether solution, which allowed the parasite’s eggs to be observed. The cat was treated with praziquantel,silymarin, S-Adenosyl methionine, and ursodeoxycholic acid. The patient gradually improved from jaundice and there was a reduction in abdominal volume. Discussion: This report describes a case of platinossomiasis associated with polycystic liver disease in a domestic cat, which seems to be an uncommon presentation. Most infected cats are asymptomatic, but some animals may exhibit anorexia, apathy, increased abdominal volume due to hepatomegaly and/or ascitis and jaundice. Although infestation in domestic cats is relatively common, its association with liver cysts is rare or poorly reported in the literature, representing a diagnostic challenge, which makes mandatory the inclusion of this differential diagnosis in polycystic liver diseases in cats. The diagnosis of this parasitosis can be made based on the association among clinical signs, laboratory tests and ultrasound examination, but the definitive diagnosis is usually made by visualizing the parasite’s eggs. In the case described, it was not possible to observe parasite’s eggs in the patient’s feces, but in the bile. Platynosomum sp. infection should always be considered as a differential diagnosis in cases of polycystic liver disease in cats, especially in countries with tropical or subtropical climate. Early diagnosis and appropriate treatment were fundamental for the improvement of the patient’s clinical condition.Keywords: feline, liver, platinosomiasis, polycystic disease, jaundice, cystic lesions

Acute Erythroid Leukemia in a Cat Infected with Feline Leukemia Virus

Background: Erythroid leukemia is a myeloproliferative hematopoietic disorder considered acute when there is a predominance of blasts in the bone marrow. It is frequently reported in cats infected with feline leukemia virus, but it is unclear whether this virus is involved in the oncogenesis. The clinical signs in cats are anorexia, apathy, weight loss, with evolution from two weeks to two months, pale mucous membranes, hemorrhages, ascites, salivation, and dyspnea due to pleural effusion. This affection responds little to chemotherapy with an unfavorable prognosis. The aim of this study is to report a case of a feline leukemia virus infected cat with the onset of severe hemolytic anemia. Case: A 8-year-old male mixed breed cat was attended with a history of anorexia, oligodipsia, apathy, progressive weight loss, and yellowish color of urine for 7 days. Laboratorial exams showed anemia (with metarubricytes, acanthocytes and ghost cells), leukocytosis and FeLV reagent test. The cat underwent treatment with methylprednisolone acetate and supportive care. One day later, the animal returned with icteric mucous membranes, and emesis. A blood count was performed that found worsening anemia, increased leukocytosis, and lymphocytosis. Abdominal ultrasound showed cholangiohepatitis and lymphadenomegaly in mesenteric lymph nodes. Mycoplasmosis associated with cholangiohepatitis and lymphoma were suspected. Treatment was started with ondansetron, metronidazole, and amoxicilin with potassium clavulanate. The cat returned after 3 days and laboratorial exams revealed worsening of blood parameters, so blood transfusion was performed. After 2 days, the patient started with dyspnea and hypothermia, that evolved to cardiorespiratory arrest. The body was sent to necropsy and histopathology, where blast cells and rubricytes were found in blood vessels of various organs. The bone marrow was markedly cellular with complete disappearance of adipose tissue. Most of the cells were blasts with abundant and eosinophilic cytoplasm, central nucleus with finely dotted chromatin and a large nucleolus. There were rubricytes, which made possible to confirm acute erythroid leukemia as a morphological diagnosis. Discussion: This cat was initially with feline stomatitis gingivitis complex, and after the results of the first tests, the suspicion of hemotropic mycoplasmosis and lymphoma was raised. The clinical signs observed in acute erythroid leukemia are lethargy, inappetence, fever, splenomegaly, mild lymphadenomegaly, associated with leukocytosis, severe anemia, and thrombocytopenia. The reported animal presented signs similar to those described in the literature except that there was no change in platelet counts. The diagnosis of leukemia was reached after histopathology, and it is made when is observed more than 30% of myeloblasts and monoblasts together or when the blast cells count including rubriblasts is greater than 30%. Although chemotherapy, the prognosis is usually poor. It is essential to perform the myelogram for the diagnosis of myeloid leukemias in vivo. In this report, we only achieve final diagnosis after the cat’s death, due to the aggressive behavior of the disease. Clinicians must be aware of the likely development of acute erythroid leukemia whenever a feline leukemia virus infected cat presents hemolytic anemia to get an early diagnosis, since this is an extremely aggressive disease, to propose prompt chemotherapy and give the patient a longer survival period.                                                            Keywords: hematopoietic disorders, hemolytic anemia, FeLV, leukemia, myeloneoplastic syndrome

Evolução Clínica, Hematológica e Radiográfica de um Cão com Poliartrite por Leishmaniose Tratado com Miltefosina

Background: Canine visceral leishmaniasis causes several clinical signs, such as lymphadenomegaly, exfoliative dermatitis, ulcerative skin lesions, and lameness. The most commonly reported locomotor changes are claudication, edema, arthralgia, joint stiffness, and muscle atrophy. Radiographic exam revealed cortical and medullary destruction, increase, or decrease in medullary opacity, proliferative periosteal reaction, osteolysis, collapse of joint spaces and soft tissue edema are observed. The aim of this report is to describe the clinical and radiographic evolution of a case of erosive polyarthritis associated with leishmaniasis in a dog before, during and after treatment with miltefosine. Case: A 7-month-old mixed-breed dog was attended due pain and limited mobility. In the orthopedic evaluation, joint swelling, stiffness, and increased pain sensitivity of the four limbs, as well as neck stiffness, were noted. Radiographic examination showed joint changes compatible with edema, with increased volume and radiopacity of the soft tissues adjacent to the joints. The segments of the patient's spine showed more severe bone alterations, the cervical spine being one of the most affected regions, with multiple bone proliferations throughout the vertebral body, especially in the ventral portion (spondylosis), compatible with polyarthritis due to leishmaniasis. Due to the suspicion, lymph node and spleen cytology was performed, confirming the diagnosis. Hematological examination revealed anemia, leukopenia due to lymphopenia and thrombocytopenia in addition to increased AST (79,4 U/L; reference: 6,2 - 13 U/L), creatine kinase (517,6 U/L; reference: 1,5 - 28,4 U/L), lactate dehydrogenase (688,4  IU/L; reference: 45 - 233 IU/L) and hyperproteinemia (7,34 g/dL; reference: 5,4 - 7,1 g/dL). Treatment with miltefosine, allopurinol, domperidone, prednisone, gabapentin and dipyrone was started. Reassessments were performed monthly for 3 consecutive months. Hematological examinations showed improvement, with resolution of anemia and thrombocytopenia, and a marked decrease in creatine kinase values. Thus, it is evident that the dog did not develop liver or kidney changes during treatment. During the treatment and monitoring in this period, the dog had a clinical improvement, which started to walk without pain. In addition, joint swellings were no longer present, however, there was no improvement in the radiographic evaluation of the joints. Discussion: Clinical signs of the locomotor system are compatible with those described in animals that had osteoarticular manifestations associated with leishmaniasis, such as arthralgia, edema, and joint stiffness. In the present report, treatment with miltefosine associated with allopurinol resulted in an improvement in the clinical picture, and this therapy is therefore promising in dogs with polyarthritis due to leishmaniasis. A case published in human medicine demonstrated the intra-articular absorption capacity of this drug. There is only one study to date that describes the radiographic evolution of a dog with arthritis due to leishmaniasis after treatment with miltefosine and allopurinol. In this case described, the dog reported remained with the osteoarticular lesions after treatment, although clinical improvement was observed, as in our report. The use of miltefosine and allopurinol are in accordance with stage II staging for leishmaniasis. In this study, although there was no improvement in the radiographic examinations, the treatment was effective in the remission of the animal's clinical condition. Keywords: allopurinol, amastigotes, domperidone, joint, leishmanicide. Título: Poliartrite em cão por Leishmaniose - tratamento com miltefosina. Descritores: alopurinol, amastigotas, articulação, domperidona, leishmanicida.Introdução: A leishmaniose visceral canina causa diversos sinais clínicos, como linfadenomegalia, dermatite esfoliativa, lesões ulcerativas na pele e claudicação. As alterações locomotoras mais comumente relatadas são claudicação, edema, artralgia, rigidez articular e atrofia muscular. O exame radiográfico revelou destruição cortical e medular, aumento ou diminuição da opacidade medular, reação periosteal proliferativa, osteólise, colapso de espaços articulares e edema de partes moles. O objetivo deste relato é descrever a evolução clínica e radiográfica de um caso de poliartrite erosiva associada à leishmaniose em um cão antes, durante e após o tratamento com miltefosina. Caso: Um cão mestiço de 7 meses de idade foi atendido por dor e dificuldade de locomoção. Na avaliação ortopédica observou-se edema articular, rigidez e aumento da sensibilidade dolorosa dos quatro membros, bem como rigidez de nuca. O exame radiográfico mostrou alterações articulares compatíveis com edema, com aumento de volume e radiopacidade dos tecidos moles adjacentes às articulações. Os segmentos da coluna da paciente apresentavam alterações ósseas mais graves, sendo a coluna cervical uma das regiões mais acometidas, com múltiplas proliferações ósseas por todo o corpo vertebral, principalmente na porção ventral (espondilose), compatível com poliartrite por leishmaniose. Diante da suspeita, foi realizada citologia de linfonodo e baço, confirmando o diagnóstico. O exame hematológico revelou anemia, leucopenia por linfopenia e trombocitopenia, além de aumento de AST  (79,4 U/L, referência: 6,2 - 13 U/L), creatina quinase (517,6 U/L, referência: 1,5 - 28,4 U/L), lactato desidrogenase (688,4 UI/L, referência: 45 – 233 UI/L) e hiperproteinemia (7,34 g/dL, referência: 5,4 – 7,1 g/dL). Foi iniciado tratamento com miltefosina, alopurinol, domperidona, prednisona, gabapentina e dipirona. As reavaliações foram realizadas mensalmente durante três meses consecutivos. Os exames hematológicos mostraram melhora, com resolução da anemia e trombocitopenia, e diminuição acentuada dos valores de creatina quinase. Assim, fica evidente que o cão não desenvolveu alterações hepáticas ou renais durante o tratamento. Durante o tratamento e acompanhamento neste período, o cão apresentou melhora clínica, passando a andar sem dor. Além disso, os edemas articulares não estavam mais presentes, porém, não houve melhora na avaliação radiográfica das articulações. Discussão: Os sinais clínicos do aparelho locomotor são compatíveis com os descritos em animais que apresentaram manifestações osteoarticulares associadas à leishmaniose, como artralgia, edema e rigidez articular. No presente relato, o tratamento com miltefosina associado ao alopurinol resultou em melhora do quadro clínico, sendo esta terapia, portanto, promissora em cães com poliartrite por leishmaniose. Um caso publicado na medicina humana demonstrou a capacidade de absorção intra-articular desta droga. Há apenas um estudo até o momento que descreve a evolução radiográfica de um cão com artrite por leishmaniose após tratamento com miltefosina e alopurinol. Neste caso descrito, o cão relatado permaneceu com as lesões osteoarticulares após o tratamento, embora tenha sido observada melhora clínica, como em nosso relato. O uso de miltefosina e alopurinol estão de acordo com o estadiamento estágio II da leishmaniose. Neste estudo, embora não tenha havido melhora nos exames radiográficos, o tratamento foi eficaz na remissão do quadro clínico do animal

Tc99m-DTPA Study to Validate an Experimental Model of Ureteral Obstruction in Rabbits: Preliminary Results

Objective. To create a ureteral obstruction experimental model that can be proved through Tc99m-DTPA renal scintigraphy and histopathological studies, without causing total renal function loss. Materials and Methods. Ten New Zealand white rabbits were submitted to a surgical experiment to create a model of unilateral obstruction to urinary flow. Surgery procedure provided unilateral ureteral obstruction (left kidney) to urinary flow and posteriorly was evaluated by Tc99m-DTPA renal scintigraphy and histopathological study. Tc99m-DTPA renal study was performed to detect and quantify signs of obstruction and to evaluate renal function. Statistical analysis was performed through the Student t-test with a significance level of P<0.05. Results. Nine of the ten rabbits presented left renal unit obstruction and one nonobstructive on the Tc99m-DTPA and histopathological studies. All the right renal units, which were not submitted to surgical procedure, were nonobstructed by the studies. There was a general agreement between scintigraphy and histopathological results in both groups. Conclusion. The experimental model promoted the creation of ureteral obstruction in rabbits, confirmed by nuclear medicine scintigraphy and histopathology, and could be used in further studies to better understand urinary obstruction