RESUMO: O transplante renal em gatos com doença renal naturalmente adquirida está cada vez mais sendo introduzido na prática clínica. O transplante renal em cães, por sua vez, representa um desafio maior devido a falta da definição de um protocolo imunossupressor equilibrado, dificuldade na seleção de doadores compatíveis e ausência de protocolos de monitoramento de transplantes. Esses e outros fatores serão abordados nesta revisão afim de melhorar os resultados, tanto a curto quanto a longo prazo do transplante renal em cães.

ABSTRACT: Transplants for cats with naturally occurring renal disease have been introduced into clinical practice, but canine renal transplantation represents a greater challenge because of the lack of a balanced immunosuppressive protocol, difficulty in selecting compatible canine kidney donors, and absence of transplantation monitoring protocols. This and other important factors will be discussed in this review to help improve short- and long-term outcomes for renal transplantation in dogs.

This work expands the classical Nelson and Winter model of Schumpeterian competition by including two sectors and a North-South dynamics, with a view to analyzing how different institutions and technological regimes affect the processes of convergence and divergence in the international economy. The results suggest that convergence may emerge out of the efforts for imitation in the South when the technological regime is cumulative. But when the regime is science-based, imitation is not enough for a successful catching-up. In this case convergence requires the South to invest in innovation as well. The work also analyses the robustness of the model results using Montecarlo techniques.

Os autores relatam um caso de tumor de corpo carotídeo (paraganglioma) em um paciente de 74 anos de idade, submetido a embolização intra-arterial com micropartículas esféricas, de polivinil acetato, com casca de polivinil álcool (PVAc + PVA), previamente à ressecção do tumor. O estudo angiográfico demonstrou massa altamente vascularizada na bifurcação carotídea esquerda, sendo a embolização pré-operatória utilizada no intuito de diminuir a vascularização e reduzir a perda sangüínea, aumentando a segurança do tratamento cirúrgico. O estudo histopatológico confirmou a presença de trombose e isquemia tecidual.

The authors report a case of carotid body tumor (paraganglioma) in a 74-year-old male patient, submitted to intraarterial embolization with spherical core/shield polyvinyl acetate and polyvinyl alcohol (PVAc + PVA) microparticles prior to surgical excision. Angiography has demonstrated a highly vascularized mass in the left carotid bifurcation, and preoperative embolization was used in order to decrease vascularity, reduce blood loss and improve safety of surgical treatment. Microscopic study confirmed presence of thrombosis and tissue ischemia.

OBJETIVO: Relacionar a influência dos dois tipos de anastomoses arteriais empregadas (término-terminal e término-lateral), da idade do receptor, do rim de doador vivo ou cadáver e do uso de remendo aórtico ("patch") quanto à presença ou não de estenose da artéria renal e, avaliar o tratamento destas estenoses. MÉTODO: Estudo retrospectivo de 278 pacientes submetidos a transplante renal no Hospital Universitário Clementino Fraga Filho (HUCFF), de maio de 1989 a maio de 2001. RESULTADOS: Não se mostrou relação entre as variáveis estudadas com a presença ou não de estenose da artéria renal. A estenose da artéria renal foi detectada em oito casos, que foram tratados, com sucesso, mediante angioplastia transluminal percutânea (ATP), com implante primário de "stent" (n = 7) ou sem implante de "stent" (n = 1). CONCLUSÕES: As variáveis estudadas não influenciaram no aparecimento da estenose da artéria renal e o tratamento endovascular foi efetivo na correção destas lesões estenóticas.

BACKGROUND: Our goal is to relate the type of anastomosis (end-to-end or end-to-side), the age of recipient patient, the type of renal graft used (live or cadaver donor) and the aortic patch usage to the development of renal artery stenosis, evaluating its treatment. Data were statistically analyzed using Fischer's Test. METHODS: This is a retrospective study of 278 patients, submitted to renal implant surgery at the Clementino Fraga Filho University Hospital, from May, 1989 to May, 2001. RESULTS: There was no demonstrable relation between the studied variables and the presence of stenosis. Renal artery stenosis was detected in eight cases, which were successfully treated through percutaneous transluminal angioplasty, with primary stent implant (n = 7) or without stent implant (n = 1). CONCLUSION: The analyzed variables didn't influence the development of renal artery stenosis. Endovascular treatment was effective for this pathology.

Abdominal aortic aneurysm reconstruction is usually performed in vascular surgical practice. However, the repair of an abdominal aortic aneurysm associated with a pelvic kidney is rare. Our goal is to present a case report of an abdominal aortic aneurysm associated with two congenital pelvic kidneys wich was treated successfully by aneurysmectomy and inclusion of an aortoaortic graft.