6 research outputs found

    Fibrinogen and thrombin concentrations are critical for fibrin glue adherence in rat high-risk colon anastomoses

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    OBJECTIVE: Fibrin glues have not been consistently successful in preventing the dehiscence of high-risk colonic anastomoses. Fibrinogen and thrombin concentrations in glues determine their ability to function as sealants, healers, and/or adhesives. The objective of the current study was to compare the effects of different concentrations of fibrinogen and thrombin on bursting pressure, leaks, dehiscence, and morphology of high-risk ischemic colonic anastomoses using fibrin glue in rats. METHODS: Colonic anastomoses in adult female Sprague-Dawley rats (weight, 250-350 g) treated with fibrin glue containing different concentrations of fibrinogen and thrombin were evaluated at post-operative day 5. The interventions were low-risk (normal) or high-risk (ischemic) end-to-end colonic anastomoses using polypropylene sutures and topical application of fibrinogen at high (120 mg/mL) or low (40 mg/mL) concentrations and thrombin at high (1000 IU/mL) or low (500 IU/mL) concentrations. RESULTS: Ischemia alone, anastomosis alone, or both together reduced the bursting pressure. Glues containing a low fibrinogen concentration improved this parameter in all cases. High thrombin in combination with low fibrinogen also improved adherence exclusively in low-risk anastomoses. No differences were detected with respect to macroscopic parameters, histopathology, or hydroxyproline content at 5 days post-anastomosis. CONCLUSIONS: Fibrin glue with a low fibrinogen content normalizes the bursting pressure of high-risk ischemic left-colon anastomoses in rats at day 5 after surgery

    Sensibilidad y especificidad de la curva de insulinemia/test de tolerancia oral a la glucosa (CI/CTOG) en el diagnóstico de resistencia a la insulina en pacientes con trastornos del ciclo menstrual

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    “El reconocimiento de la relación entre SOP y RI data de 1980. RI e hiperinsulinemia son bien conocidas por ser características del SOP, estimulando la secreción de andrógenos ováricos y suprimiendo la producción de SHBG (1-4). Determinar cuáles son los puntos de corte de la CI/CTOG que traduzcan una prueba con mayor capacidad diagnóstica de RI. Material y Métodos: Estudio descriptivo transversal analítico de pacientes con rastornos del ciclo menstrual quienes fueron sometidas a examen bioquímico para determinar los niveles de insulina y glucosa en ayuno y a las 2 horas tras la ingesta de 75 gramos de glucosa anhidra. Calculando HOMA-IR y realizando la correlación diagnóstica. Se calculó sensibilidad, especificidad, VPP y VPN, se ajustaron los puntos de corte para la CI/CTOG. Todos los valores de p<0.05 fueron considerados como significativos. Resultados: Se incluyeron 110 pacientes, edad promedio 32.6 años e IMC medio de 27.05 kg/m2. Predominaron la opsomenorrea 41.8% y la hipermenorrea 27.3%. El HOMA-IR detectó 56(50.9%) y la CI/CTOG detectó 74(67.4%).Los hallazgos demuestran que existe mayor insulinemia tras la CI/CTOG con sensibilidad normal a la insulina en pacientes con anovulación.
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