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This study analyzes the relationship between extracellular purines and pain perception in humans. Cerebrospinal fluid (CSF) levels of purines and their metabolites were compared between patients displaying acute and/or chronic pain syndromes and control subjects. The CSF levels of IMP, inosine, guanosine and uric acid were significantly increased in the chronic pain group and correlated with pain severity (P<0.05). Patients displaying both chronic and acute pain presented similar changes in the CSF purines concentration (P<0.05). However, in the acute pain group, only CSF inosine and uric acid levels were significantly increased (P<0.05). These findings suggest that purines, in special inosine, guanosine and uric acid, are associated with the spinal mechanisms underlying nociception.

Levobupivacaine and bupivacaine were equally effective for epidural block in patients undergoing cesarean section.

Sevoflurane may open new perspectives for inhalational anesthesia in patients with neurological diseases to be submitted to outpatient procedures, since it provides hemodynamic stability and early emergence, while preserving brain physiology.

RESUMO Balle VR, Machado SB, Gomes MEW, Mendes FF-Cesariana em Paciente com Doença de von Willebrand Associada à Infecção pelo HIV. Relato de Caso JUSTIFICATIVA E OBJETIVOS: A doença de von Willebrand é a alteração inata da coagulação mais freqüente em mulheres jovens. A infecção por HIV tem mostrado incidência progressivamente maior em mulheres, constatando-se transmissão vertical em até 25% dos casos. O objetivo deste relato é mostrar o caso de uma paciente com doença de von Willebrand e HIV positivo submetida à cesariana. RELATO DO CASO: Paciente de 24 anos, portadora de anemia microcítica, doença de von Willebrand e HIV, chegou à emergência obstétrica em início de trabalho de parto. Não realizou pré-natal. Foi indicada cesariana a fim de diminuir os riscos de transmissão vertical em paciente com carga viral de HIV desconhecida. Apresentava hematomas pelo corpo e história de hematoma de parede abdominal em cesariana anterior. Os testes de coagulação eram pouco alterados. Após infusão de concentrado de fator VIII foi realizada anestesia geral. Mãe e recém-nascido apresentaram evolução satisfatória. CONCLUSÕES: A avaliação de manifestações clínicas em pacientes com coagulopatia é fundamental na decisão do tipo de anestesia a ser indicada para cada paciente. A avaliação deve ser individualizada, considerando os riscos e benefícios da técnica escolhida. Nestas pacientes, deve-se sempre restringir ao máximo a indicação de interrupção da gestação por via alta, optando-se sempre pelos métodos menos invasivos. A terapia com concentrado de fator VIII é atualmente a melhor opção de tratamento, corrigindo a deficiência específica e diminuindo os riscos de transmissão viral. Unitermos: CIRURGIA, Obstétrica: cesariana; DOENÇAS: von Willlebrand, síndrome da imunodeficiência adquirida SUMMARY Balle VR, Machado SB, Gomes MEW, Mendes FF-Anesthesia for Cesarean Section in Patient with von Willebrand's Disease and HIV Infection. Case Report BACKGROUND AND OBJECTIVES: Von Willebrand's disease is the most common hereditary coagulation disorder in young women. The incidence of HIV infection among women has been progressively increasing, and vertical transmission may account for 25% of cases. This report aimed at describing the case of an HIV-positive patient with von Willebrand's disease scheduled for cesarean section. CASE REPORT: Female HIV-positive patient, 24 years old, with microcytic anemia and von Willebrand's disease, admitted to the emergency room in early labor. She had no pre-natal care. Cesarean section was indicated to lower vertical transmission risks since HIV viral count was unknown. Patient had hematomas on both arms and legs and history of abdominal wall hematoma in previous cesarean section. Coagulation tests were mildly changed. General anesthesia was induced after factor VIII concentrate infusion. Both mother and newborn had satisfactory outcomes. CONCLUSIONS: Clinical evaluation of patients with coagulopathies is critical for determining the anesthetic technique. Evaluation should be individualized, considerin...

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Preoperative Evaluation Anesthesiologists achieved a higher score as compared to other groups. This was probably related to more training obtained by the constant ECG interpretation in the clinic.