Efectividad de anticoagulación regional con citrato en terapia de reemplazo renal continua

Background: Anticoagulation in continuous renal replacement therapy (CRRT) is essential to counteract the coagulation cascade activation, induced by the dialysis circuit. Heparin is the most widely used anticoagulant, followed by regional citrate anticoagulation (RCA). Aim: To determine the effectiveness and safety of anticoagulant treatment with citrate in CRRT. Material and Methods: Retrospective study of adults in CRRT hospitalized between the years 2014 and 2020 in critical units, who required change to RCA according to established protocols. Results: We studied 24 patients aged 63 ± 13 years (12 females). The reasons for admission were acute kidney injury (AKI) in 80% and stage 5 chronic kidney disease in 20%. The indication of RCA in 75% of patients was by coagulation of more than 3 circuits in 24 hours. The duration of the circuit in RCA was 18.5 ± 4.8 hours versus 11.9 ± 4.9 hours with heparin (p < 0.0001). There were 19 mild complications that did not affect the RCA. Conclusions: RCA is feasible to perform, it is a safe and efficient procedure if it is protocolized, allowing a longer duration of the dialysis circuit.

Eficacia de una estrategia estandarizada y simplificada para tratamiento de la hipertensión arterial en Chile: la Iniciativa HEARTS en las Américas / Efficacy of a standardized and simplified strategy for the treatment of high blood pressure in Chile: the HEARTS Initiative in the Americas / Eficácia de uma estratégia padronizada e simplificada para o tratamento da hipertensão arterial no Chile: a iniciativa HEARTS nas Américas

RESUMEN Objetivo. Evaluar la eficacia de un protocolo estandarizado y simplificado basado en los pilares técnicos de la Iniciativa HEARTS para el control de pacientes hipertensos del Programa de Salud Cardiovascular en el primer nivel de atención de salud en Chile. Métodos. Estudio observacional longitudinal (cohorte histórica), en 2 centros de salud familiar del primer nivel de atención en Santiago, que comparó el control de presión arterial en adultos hipertensos logrado con el protocolo estandarizado y simplificado, frente al protocolo habitual, según las guías nacionales. Las innovaciones del protocolo estandarizado incluyeron cambios en la coordinación del equipo de salud, inicio de tratamiento farmacológico inmediatamente después de confirmación diagnóstica, tratamiento farmacológico estandarizado con combinación de al menos 2 o 3 fármacos antihipertensivos en un sólo comprimido, en una toma diaria. Se realizó seguimiento por 1 año para evaluar el porcentaje de adherencia al tratamiento y cumplimiento de metas de control de presión arterial (menor a 140/90 mmHg). Resultados. Se evaluaron 1 490 pacientes: 562 que utilizaron el protocolo estandarizado y simplificado y 928 tratados con el protocolo habitual (centros de salud familiar-1: 650, centros de salud familiar -2: 278). A 1 año de seguimiento, los pacientes del grupo del protocolo estandarizado y simplificado tuvieron mayor proporción de cumplimiento de metas de control de presión arterial (65% versus 37% y 41%, p<0,001) y mayor porcentaje de adherencia al tratamiento en comparación con aquellos con el protocolo habitual (71% versus 18% y 23%, p<0,001). Conclusiones. Los resultados muestran que el protocolo estandarizado y simplificado es más efectivo que el protocolo habitual en el control de hipertensión arterial en pacientes en tratamiento en el primer nivel de atención en Chile. Su implementación a nivel nacional podría contribuir a la disminución de eventos cardiovasculares mayores.

ABSTRACT Objective. To evaluate the effectiveness of a standardized and simplified protocol based on the technical pillars of the HEARTS Initiative for the control of hypertensive patients in the Cardiovascular Health Program at the first level of care in Chile. Methods. Longitudinal observational study (historical cohort) in two family health centers at the first level of care in Santiago. The control of blood pressure in hypertensive adults using a standardized and simplified protocol was compared to the usual protocol based on national guidelines. Innovations in the standardized protocol included changes in how the health team is coordinated, initiation of pharmacological treatment immediately after confirmed diagnosis, standardized pharmacological treatment with a combination of at least two or three antihypertensive drugs taken daily in a single tablet. Follow-up was conducted after one year to assess the percentage of adherence to treatment and achievement of blood pressure control targets (< 140/90 mmHg). Results. A total of 1490 patients were evaluated: 562 who followed the standardized and simplified protocol, and 928 who were treated with the usual protocol (family health centers: 650; family health centers: 278). After one year, patients in the standardized and simplified protocol group had a higher proportion of adherence to blood pressure control targets (65% versus 37% and 41%, p<0.001) and higher adherence to treatment compared to those following the usual protocol (71% versus 18% and 23%, p<0.001). Conclusions. The results show that the standardized and simplified protocol is more effective than the usual protocol in controlling arterial hypertension in patients undergoing treatment at the first level of care in Chile. Its implementation at the national level could contribute to a decrease in major cardiovascular events.

RESUMO Objetivo. Avaliar a eficácia de um protocolo padronizado e simplificado, com base nos pilares técnicos da iniciativa HEARTS, para o controle de pacientes com hipertensão arterial do Programa de Saúde Cardiovascular na atenção primária à saúde do Chile. Métodos. Estudo observacional longitudinal (coorte histórica) em 2 centros de atenção primária de saúde da família em Santiago, que comparou o controle da pressão arterial em adultos com hipertensão, atingido com o protocolo padronizado e simplificado, versus o protocolo habitual, de acordo com as diretrizes nacionais. As inovações do protocolo padronizado incluíram mudanças na coordenação da equipe de saúde, início do tratamento farmacológico imediatamente após a confirmação do diagnóstico e tratamento farmacológico padronizado com associação de pelo menos 2 ou 3 anti-hipertensivos em um único comprimido, tomados uma vez ao dia. O acompanhamento foi realizado por 1 ano para avaliar o percentual de adesão ao tratamento e o cumprimento das metas de controle da pressão arterial (menor que 140/90 mmHg). Resultados. Foram avaliados 1.490 pacientes: 562 que utilizaram o protocolo padronizado e simplificado e 928 que foram tratados com o protocolo habitual (unidade de saúde da família 1: 650, unidade de saúde da família 2: 278). Em 1 ano de seguimento, os pacientes do grupo do protocolo padronizado e simplificado apresentaram maior proporção de cumprimento das metas de controle da pressão arterial (65% versus 37% e 41%, p<0,001) e maior percentual de adesão ao tratamento, em comparação com aqueles que utilizaram o protocolo habitual (71% versus 18% e 23%, p<0,001). Conclusões. Os resultados mostram que o protocolo padronizado e simplificado é mais eficaz que o protocolo habitual no controle da hipertensão arterial em pacientes que estão em tratamento na atenção primária do Chile. Sua implementação no nível nacional poderia contribuir para a redução de eventos cardiovasculares maiores.

Aneurisma aórtico abdominal asociado a coagulación intravascular diseminada crónica: una complicación rara / Abdominal aortic aneurysm associated with chronic disseminated intravascular coagulation: a rare complication

Resumen La coagulación intravascular diseminada es un proceso sistémico caracterizado por la activación generalizada de la coagulación, que tiene el potencial de causar trombosis vascular, hemorragia y falla orgánica. En raras ocasiones, las anomalías vasculares, como el aneurisma aórtico abdominal, pueden desencadenar coagulación intravascular diseminada crónica. Los aneurismas aórticos grandes, su disección y su expansión son factores de riesgo. En estos casos predominan los síntomas subclínicos y la coagulopatía solo se identifica mediante pruebas de laboratorio. Existe evidencia limitada basada en la experiencia de series de casos de coagulación intravascular diseminada crónica como complicación en pacientes con aneurisma aórtico abdominal. Además, la duración y la respuesta terapéutica a la heparina no se conocen bien, principalmente en los pacientes con manejo conservador. Se considera un desafío diagnóstico y terapéutico debido a la baja frecuencia de presentación. A continuación, se describen las características clínicas y paraclínicas, así como el tratamiento, de un paciente con aneurisma aórtico abdominal asociado con coagulación intravascular diseminada crónica.

Abstract Disseminated intravascular coagulation is a systemic process characterized by the widespread activation of coagulation with the potential for causing vascular thrombosis, hemorrhage and organ failure. Rarely, vascular anomalies like abdominal aortic aneurysm can trigger chronic disseminated intravascular coagulation. Large aortic aneurysms, dissection and expansion are risk factors. In these cases, subclinical symptoms predominate and coagulopathy is only identified by laboratory tests. Nowadays there is limited evidence based on experience from case series of chronic disseminated intravascular coagulation as complication in patients with abdominal aortic aneurysm. Furthermore, duration and therapeutic response with heparin therapy are not well known, mainly in those patients with conservative management. It is considered a diagnostic and therapeutic challenge due to the low presentation frequency. The clinical characteristics, laboratory and treatment of a patient with abdominal aortic aneurysm associated with chronic disseminated intravascular coagulation are described below.

Damage control surgical management of combined small and large bowel injuries in penetrating trauma: Are ostomies still pertinent? / Cirugía de control de daños en lesiones combinadas de intestino delgado y colon en trauma penetrante: ¿Es pertinente el uso de ostomías?

Abstract Hollow viscus injuries represent a significant portion of overall lesions sustained during penetrating trauma. Currently, isolated small or large bowel injuries are commonly managed via primary anastomosis in patients undergoing definitive laparotomy or deferred anastomosis in patients requiring damage control surgery. The traditional surgical dogma of ostomy has proven to be unnecessary and, in many instances, actually increases morbidity. The aim of this article is to delineate the experience obtained in the management of combined hollow viscus injuries of patients suffering from penetrating trauma. We sought out to determine if primary and/or deferred bowel injury repair via anastomosis is the preferred surgical course in patients suffering from combined small and large bowel penetrating injuries. Our experience shows that more than 90% of all combined penetrating bowel injuries can be managed via primary or deferred anastomosis, even in the most severe cases requiring the application of damage control principles. Applying this strategy, the overall need for an ostomy (primary or deferred) could be reduced to less than 10%.

Resumen El trauma de las vísceras huecas representa una gran proporción de las lesiones asociadas al trauma penetrante. Actualmente, las lesiones aisladas de intestino delgado o colon se manejan a través de anastomosis primaria en pacientes sometidos a laparotomía definitiva o anastomosis diferida en pacientes que requieran cirugía de control de daños. El dogma quirúrgico tradicional de la ostomía se ha probado que es innecesario y en muchos casos puede aumentar la morbilidad. El objetivo de este artículo es describir la experiencia obtenida en el manejo de lesiones combinadas de vísceras huecas de pacientes con trauma penetrante. Se determinó que el manejo primario o diferido del intestino a través de anastomosis es el abordaje quirúrgico preferido en pacientes que presentan lesiones penetrantes combinadas de intestino delgado y colon. Se ha reportado que el 90% de lesiones combinadas penetrantes intestinales pueden ser manejadas a través de anastomosis primaria o diferida incluso en los casos más severos requieren la aplicación de los principios de control de daños. Aplicando esta estrategia, la tasa general para ostomía (primaria o diferida) puede ser reducida a menos del 10%.

Evolution of damage control surgery in non-traumatic abdominal pathology: a light in the darkness / Evolución de la cirugía de control de daños en patología no traumática abdominal: un faro en medio de la tormenta

Abstract Damage control surgery is based on temporal control of the injury, physiologic recovery and posterior deferred definitive management. This strategy began in the 1980s and became a formal concept in 1993. It has proven to be a strategy that reduces mortality in severely injured trauma patients. Nevertheless, the concept of damage control in non-traumatic abdominal pathology remains controversial. This article aims to gather historical experiences in damage control surgery performed in non-traumatic abdominal emergency pathology patients and present a novel management algorithm. This strategy could be a surgical option to treat hemodynamically unstable patients in catastrophic scenarios such as hemorrhagic and septic shock caused by peritonitis, pancreatitis, acute mesenteric ischemia, among others. Therefore, damage control surgery is light amid better short- and long-term results.

Resumen La cirugía de control de daños es una estrategia de control temporal del daño tisular y recuperación fisiológica para un manejo definitivo diferido. Esta estrategia tiene antecedentes en el mundo del trauma desde la década de 1980, hasta su formalización conceptual en 1993. Hasta el momento ha demostrado ser una estrategia factible y que reduce la mortalidad en los pacientes críticamente enfermos. Sin embargo, el manejo de patologías abdominales no traumáticas aun es tema de discusión sobre su factibilidad y seguridad. El presente articulo tiene como objetivo realizar un relato histórico y experiencias en la aplicación de la cirugía de control de daños en emergencias quirúrgicas abdominales no asociadas a trauma y presentar un algoritmo de manejo usando los principios de la cirugía de control de daños. La aplicabilidad del control de daños en no trauma se enfrenta a los contextos de shock hemorrágico y séptico para patologías como peritonitis generalizada, peritonitis postquirúrgica, pancreatitis, isquemia mesentérica aguda, entre otras. Se ha demostrado que el uso de control de daños representa una luz para el cirujano ante la tormenta de la incertidumbre de la descompensación metabólica en el manejo de emergencias abdominales, para crear un puente para su manejo definitivo y permitir anastomosis como estrategia de reconstrucción intestinal y mejorar los resultados a corto y largo plazo.

Damage control in penetrating duodenal trauma: less is better - the sequel / El control de daños en trauma penetrante de duodeno: "Menos es Mejor

Abstract The overall incidence of duodenal injuries in severely injured trauma patients is between 0.2 to 0.6% and the overall prevalence in those suffering from abdominal trauma is 3 to 5%. Approximately 80% of these cases are secondary to penetrating trauma, commonly associated with vascular and adjacent organ injuries. Therefore, defining the best surgical treatment algorithm remains controversial. Mild to moderate duodenal trauma is currently managed via primary repair and simple surgical techniques. However, severe injuries have required complex surgical techniques without significant favorable outcomes and a consequential increase in mortality rates. This article aims to delineate the experience in the surgical management of penetrating duodenal injuries via the creation of a practical and effective algorithm that includes basic principles of damage control surgery that sticks to the philosophy of "Less is Better". Surgical management of all penetrating duodenal trauma should always default when possible to primary repair. When confronted with a complex duodenal injury, hemodynamic instability, and/or significant associated injuries, the default should be damage control surgery. Definitive reconstructive surgery should be postponed until the patient has been adequately resuscitated and the diamond of death has been corrected.

Resumen El trauma de duodeno comúnmente se produce por un trauma penetrante que puede asociarse a lesiones vasculares y de órganos adyacentes. En el manejo quirúrgico se recomienda realizar un reparo primario o el empleo de técnicas quirúrgicas simples. Sin embargo, el abordaje de lesiones severas del duodeno es un tema controversial. Anteriormente, se han descrito técnicas como la exclusión pilórica o la pancreatoduodenectomía con resultados no concluyentes. El presente artículo presenta una propuesta del manejo de control de daños del trauma penetrante de duodeno, a través, de un algoritmo de cinco pasos. Este algoritmo plantea una solución para el cirujano cuando no es posible realizar el reparo primario. El control de daños del duodeno y su reconstrucción depende de una toma de decisiones respecto a la porción del duodeno lesionada y el compromiso sobre el complejo pancreatoduodenal. Se recomiendan medidas rápidas para contener el daño y se proponen vías de reconstrucción duodenal diferente a las clásicamente descritas. Igualmente, la probabilidad de complicaciones como fistula duodenales es considerable, por lo que proponemos, que el manejo de este tipo de fistulas de alto gasto se aborde por medio de una laparostomía retroperitoneal (lumbotomía). El abordaje del trauma penetrante de duodeno se puede realizar a través del principio "menos es mejor".

Rabdomiólisis como presentación inicial de COVID-19: caso Clínico / Rhabdomyolysis as the presentation form of COVID-19 infection: report of one case

COVID-19 infection causes a systemic inflammatory response, which mainly presents as a febrile syndrome with respiratory involvement. We report a 37-year-old male who consulted for myalgia, nausea and epigastric pain lasting three days. On admission, he had crepitations at the lung bases. The initial laboratory showed a creatine kinase of 62,768 U/L, a LDH of 1,110 IU/L, a creatinine a 2.1 mg/dL, an aspartate aminotransferase of 1,347 IU/L, a D-dimer of 1,140 ng/mL, a ferritin of 1,201 ng/mL and a lymphocyte count of 810 cells/mm3. The chest CT scan was compatible with multifocal pneumonia, suggesting a COVID-19 infection. COVID-19 PCR was positive. The patient was managed with hydration, sodium bicarbonate, ceftriaxone, and azithromycin, with a good clinical response.

Effectiveness of triple therapy with dapagliflozin add-on to dual therapy over 52 weeks in patients with uncontrolled type 2 diabetes mellitus in a centre of high complexity, Cali-Colombia

ABSTRACT Objectives: To evaluate the effectiveness of adding dapagliflozin as an intensification strategy for the treatment of patients with uncontrolled type 2 diabetes mellitus (T2DM). Materials and methods: A historical cohort study was conducted in 123 adult patients over 18 years old who were diagnosed with uncontrolled T2DM, who received dapagliflozin add-on to their dual base treatment: metformin plus glibenclamide (n = 32), metformin plus saxagliptin (n = 29), metformin plus exenatide (n = 28), or metformin plus insulin (n = 34). The endpoints were evaluated using analysis of variance. Results: All the patients completed a 52-week follow-up. Overall, 52.85% of patients were female, the Hispanic population represented the largest proportion of patients in all groups (60.98%), and the mean ± SD patient age and body weight were 55.05 ± 7.58 years and 83.55 ± 9.65 kg, respectively. The mean ± SD duration of T2DM, glycated hemoglobin (HbA1c), and fasting plasma glucose (FPG) were 5.93 ± 2.98 years, 8.1 ± 0.53%, and 166.03 ± 26.80 mg/dL, respectively. The grand mean changes of HbA1c, FPG, body weight and blood pressure showed a decreasing trend during the study period and it was statistically significant in all groups (p-value = <0.001). The proportion of patients achieving HbA1c target (<7%) was highest in the group that used a dapagliflozin add-on to metformin plus saxagliptin. Conclusion: The addition of dapagliflozin as an alternative for intensification of dual therapy consistently improved, not only FPG and HbA1c, but also body weight and blood pressure, with statistically significant results.

Hipofosfatemia inducida por drogas: fierro carboximaltosa e imatinib. Casos clínicos / Hypophosphatemia induced by carboxymaltose iron and imatinib. Report of two cases

Hypophosphatemia is a relatively frequent and a potentially serious adverse drug effect. Clinically it is characterized by bone pain and muscle weakness. There are several mechanisms by which a drug can induce hypophosphatemia and they can be classified according to whether or not they are mediated by an excess of Fibroblast Growth Factor 23 (FGF23). We report two patients with the condition: (i) A 49-year-old woman with Chronic Myeloid Leukemia (CML) and gastric sleeve surgery at 46 years of age. After receiving intravenous carboxymaltose iron in one occasion due to refractory anemia, she developed symptomatic hypophosphatemia. Urinary phosphate losses associated with high FGF23 levels were confirmed. Plasma phosphate returned to normal values 90 days after the iron administration. (ii) A 40-year-old man with a history of CML in whom imatinib was started. He developed symptomatic hypophosphatemia due to non FGF23-mediated hyperphosphaturia. As treatment with imatinib could not be interrupted, hypophosphatemia and its symptoms resolved with oral phosphate intake. These cases illustrate the importance of recognizing and treating drug-induced hypophosphatemia in a timely manner, and thus avoid the morbidity associated with this entity.

Enfermedades hepáticas y embarazo / Liver diseases and pregnancy

Resumen La prevalencia de las enfermedades hepáticas en el embarazo no es despreciable, ya que estas se presentan en 3%-5% de todas las gestaciones. Entre las múltiples causas se encuentran cambios fisiológicos del embarazo; enfermedad hepática preexistente, siendo las más comunes las enfermedades colestásicas (colangitis biliar primaria y colangitis esclerosante primaria), hepatitis autoinmune, enfermedad de Wilson, hepatitis virales crónicas, cirrosis establecida de cualquier etiología y paciente con historia de trasplante hepático; enfermedad hepática adquirida durante el embarazo, siendo las principales las hepatitis virales, la toxicidad inducida por medicamentos y la hepatolitiasis; hepatopatía relacionada con el embarazo, en la cual se encuentran 5 entidades principales: hiperémesis gravídica, colestasis intrahepática del embarazo, preeclampsia, síndrome HELLP e hígado graso del embarazo. La severidad de estas entidades tiene una amplia gama de presentaciones, desde la paciente que es completamente asintomática, hasta la falla hepática aguda e incluso la muerte. La gravedad del cuadro se asocia con una morbilidad y mortalidad significativas tanto para la madre como para el feto, lo cual hace que una evaluación rápida, diagnóstico certero y manejo apropiado por un equipo multidisciplinario (incluida obstetricia de alto riesgo, hepatología, gastroenterología y radiología intervencionista), en un servicio que tenga la posibilidad de ofrecer trasplante hepático, sean fundamentales para obtener buenos desenlaces.

Abstract Liver diseases develop in 3% to 5% of all gestations. Among the causes are: 1. Physiological changes of pregnancy. 2. Pre-existing liver diseases and conditions. The most common are cholestatic diseases such as primary biliary cholangitis and primary sclerosing cholangitis. Others include autoimmune hepatitis, Wilson's disease, chronic viral hepatitis, cirrhosis of any etiology and histories of liver transplantation. 3. Liver disease acquired during pregnancy, especially viral hepatitis, drug-induced toxicity and hepatolithiasis. 4. Pregnancy-related liver diseases including hyperemesis gravidarum, intrahepatic cholestasis of pregnancy, preeclampsia, HELLP syndrome and fatty liver of pregnancy. Severity ranges from absence of symptoms to acute liver failure and even death. Severe cases have significant morbidity and mortality for both mother and fetus. These cases require rapid evaluation, accurate diagnosis and appropriate management by a multidisciplinary team including high-risk obstetrics, hepatology, gastroenterology and interventional radiology. Availability of liver transplantation is also important for obtaining good outcomes.

Niveles de glucemia intraoperatoria y su relación con la morbimortalidad a corto y largo plazo en pacientes con trasplante de hígado en un hospital de alta complejidad / Levels of intraoperative glycemia and their relations to short and long term morbidity and mortality in liver transplant patients at a highly complex hospital

Resumen Objetivo: se realizó un estudio en pacientes sometidos a trasplante de hígado (TH) con el objetivo de determinar los valores de glucemia en cada una de las fases de la cirugía del TH y su relación con la morbimortalidad postoperatoria. Materiales y métodos: se identificaron los trasplantes hepáticos entre 2013 y 2015 en los registros institucionales. La información se tomó de la nota operatoria, registros de laboratorio y evoluciones de historia clínica. Se buscaron diferencias en la glucemia en las 3 fases del trasplante entre diabéticos y no diabéticos, la presencia de infección y rechazo. Resultados: en total, se estudiaron 73 pacientes trasplantados, 54,8% (n = 40) de sexo masculino, con una mediana en la edad de 59 años (rango intercuartílico [RIQ] = 52-53). El 32,9% (n = 24) tenía antecedente de diabetes mellitus (DM). Se encontraron diferencias en la glucemia inicial y final (127 mg/dL frente a 212 mg/dL) en diabéticos (p = 0,001), así como en los no diabéticos (glucemia inicial: 105 mg/dL frente a la final: 190 mg/dL) (p <0,000). La proporción de rechazo fue mayor en diabéticos (14,3%, n = 7). No se encontraron diferencias significativas en la presencia de infecciones entre diabéticos y no diabéticos. Se confirmó el diagnóstico de diabetes postrasplante en el 15,1%. Conclusiones: un adecuado control glucémico en los diferentes períodos del transoperatorio en el TH logra igualar la tasa de complicaciones a nivel infeccioso en pacientes diabéticos y no diabéticos; el rechazo continúa siendo más frecuente en pacientes diabéticos. Es necesaria una búsqueda activa de la diabetes postrasplante en cada uno de nuestros pacientes.

Abstract Objective: This study was of patients who underwent liver transplantation has the objective of determining glycemia values ​​in each phase of liver transplant surgery and their relationships with post-operative morbidity and mortality. Materials and Methods: Liver transplant patients were identified in institutional records from 2013 to 2015. The information was taken from operative notes, laboratory records and clinical histories. We searched for differences in blood glucose levels during the three phases of transplantation and compared the incidences of infections and rejections for diabetics and non-diabetics. Results: A total of 73 transplant patients were studied: 54.8% (n = 40) were male, the median age was 59 years (RIQ = 52-53), and 32.9% (n = 24) had histories of Diabetes Mellitus. Differences were found between initial and final serum glucose levels of diabetics (127 mg/dl vs. 212 mg/dl, p = 0.001) as well as in non-diabetics (105 mg/dl vs. 190 mg/dl, p < 0.000). The proportion of rejection was highest among diabetics (14.3%, n = 7). No significant differences were found in the proportions of diabetic and non-diabetic patients who developed infections. Diagnosis of post-transplant diabetes was confirmed in 15.1% of the sample. Conclusions: Adequate monitoring of blood glucose levels during all trans-operative periods of liver transplantation can equalize the rate of infectious complications in diabetic and non-diabetic patients. Rejection continues to be more frequent among diabetic patients. An active search for post-transplant diabetes is necessary for every patient.

Análisis de falsos negativos en la cintigrafía SPECT de paratiroides con sestamibi en pacientes con hiperparatiroidismo primario sometidos a cirugía entre 2008-2015 en hospital universitario / False negative spect parathyroid scintigraphy with sestamibi in patients with primary hyperparathyroidism

Background: 99mTc-sestamibi parathyroid SPECT scintigraphy is a useful tool in the pre-operative study of hyperparathyroidism. False negatives (FN) have been reported in 5.7-14% of the examinations. Aim: To characterize 99mTc-sestamibi FN in cases referred for primary hyperparathyroidism (PHP) to a university hospital. Material and Methods: Descriptive retrospective analysis. We included patients with PHP, studied with SPECT scintigraphy, operated at our center between 2008 and 2015. Clinical and surgical data were recorded; biopsies of the FN were blindly reviewed by one pathologist. Results: One hundred twenty one scintigraphies fulfilled the inclusion criteria. Seven (5.8%) were negative and 114 positive. There was no difference in age, sex and PTH levels between FN and true positive scintigraphies. At surgery, one FN case had two hyperplasic glands and two cases had ectopic glands. Pathology reported adenoma in three cases, hyperplasia in three and carcinoma in one. The largest diameter of the lesion was lower in FN (1.3 and 2.1 cm respectively, p = 0.02) and the proportion of adenomas was higher in true positive cases (29% and 75% respectively; p < 0.01). The interval between scintigraphy and parathyroidectomy was greater in FN with a median of 92 days (range 20 days-3.2 years, p < 0.01). The percentage of oxyphilic cells observed was similar in both groups. Conclusions: FN parathyroid SPECT scintigraphies in PHP are uncommon. They corresponded to lesions under the equipment's resolution limit and resulted in longer time lags between scintigraphy and surgery.

Necrosis cutánea por warfarina / Warfarin-Induced skin necrosis

La necrosis cutánea por warfarina aparece entre 0.01-0.1% de los pacientes, afecta más a mujeres con obesidad y antecedentes de enfermedad tromboembólica luego del quinto día de su inicio. Se debe a un imbalance transitorio de los sistemas anticoagulante y procoagulante, caracterizado por flictenas hemorrágicas en zonas con tejido graso. Reportamos el caso de una necrosis cutánea por warfarina con un desenlace fatal. (Acta Med Colomb 2012; 37: 138-141).

Warfarin-induced skin necrosis appears between 0.01% to 0.1% of patients. It affects mostly women with obesity and a history of thromboembolic disease after the fifth day of its administration, and is caused by a transient imbalance of procoagulant and anticoagulant systems, characterized by hemorrhagic blisters in areas with fatty tissue. (Acta Med Colomb 2012; 37: 138-141). We report the case of a warfarin-induced skin necrosis with fatal outcome.

¿Están preparados los residentes e internos para enseñar?: Percepción de estudiantes de medicina de pre y postgrado / Are residents and interns prepared for teaching?: Perceptions of undergraduate and graduate medical students

Background: Every doctor is expected to be competent in teaching. There are few initiatives to prepare medical students for this role. Aim: To explore residents (graduate students) and interns (final year undergraduate students) perceptions of the importance of acquiring teaching skills and how prepared they feel to meet this role. To determine the importance that undergraduate students give to such teaching. Material and Methods: Residents and interns participated in focus groups, and completed the Medical Education Readiness Questionnaire (METRQ), 5th year medical students were also invited to complete it. Results: Three hundred and seventy seven subjects answered the questionnaire. The perceived importance of having teaching skills was 6.1 ±1.2 among residents and 5.7 ± 1.6 among interns, in a scale 1 to 7. Their perception of their own preparation for teaching was 4.3 ± 1.6 for both groups in the same scale. Students evaluated the preparation of the residents for teaching as 5.2 ± 1.6 and that of the interns as 4.4 ±1.7. Seventy-eight percent of 5th year medical students reported to learn more than two. 5 hours a week from residents. Fifty-nine percent of residents and 66 percent of interns reported to teach up to 2.5 hours per week to the same students. Focus groups participants agreed that teaching is an important role for a physician, and that to do it properly requires personal characteristics, along with teaching skills. They also found that the best opportunities to learn how to teach are during practical training. Conclusions. Our study contributes to the recognition of the teaching role of physicians and the need for teaching training among medical students.

Púrpura trombótica trombocitopénica. Presentación de casos y discusión / Thrombotic thrombocytopenic purpura. Cases report and review

Se describen dos casos de púrpura trombótica trombocitopénica (PTT), el primero con una respuesta excelente a la terapia y el segundo con desenlace fatal debido a la escasez de plasma del grupo AB a pesar de la sospecha y la institución temprana del manejo. La PTTes una entidad con alta mortalidad si no se sospecha con rapidez y se instaura un tratamiento efectivo. La asociación de anemia y trombocitopenia en ausencia de leucopenia, debe alertar al clínico; si se confirma anemia hemolítica microangiopática más trombocitopenia es un argumento suficiente para iniciar plasmaféresis diaria en presencia o no de síntomas neurológicos, renales o fiebre, ya que en todos los pacientes podría no encontrarse la péntada clásica completa de la PTT. El intercambio plasmático con plasma fresco congelado o plasma sobrenadante de crioprecipitado puede ser salvador de la vida en estos pacientes. En la tercera parte de casos, siguen un curso crónico o refractario y se puede emplear inmunosu-presión con rituximab o ciclosporina. La esplenectomía es otra alternativa para considerar en los pacientes que no responden a la plasmaféresis.

In this paper two thrombotic thrombocytopenic purpura (TTP) are presented; first one had excellent response but second one died because had lack of AB plasma to treatment. TTP is high mortality disorder if it not suspected and do a effective treatment. Anemia associated with thrombocytopenia without leucopenia must alert physicians; if microangiopathic hemolytic anemia plus thrombocytopenia are detected, this is reason to start daily plasmapheresis in presence o nor of neurological or renal symptoms or high temperature because there are patients without all TTP manifestations. Plasma exchange saves TTP patients life; one over three patients follow a chronic or refractive course, and immunosuppressive therapy with rituximab cyclosporine are an option.

Curso clínico de la peritonitis grave en pacientes críticamente enfermos tratados con sutura primaria diferida / Clinical evolution of severe peritonitis in critically ill patients that underwent deferred primary closure

Introducción. La anastomosis primaria es una técnica posible en el manejo de la peritonitis secundaria grave en pacientes críticamente enfermos; sin embargo, su uso se ha limitado por el riesgo de complicaciones y muerte. Materiales y métodos. Se seleccionaron pacientes con peritonitis secundaria grave que requerían resección de un segmento del intestino y se manejaron con ligadura transitoria de intestino con hiladilla, abdomen abierto, laparotomías múltiples programadas y posterior anastomosis primaria diferida. Como éxito primario se definió aquel caso en el cual se logró hacer la anastomosis y no tuvo filtración ni fístula.Resultados. Se estudiaron 26 pacientes. El APACHE II promedio fue de 15,3 puntos. Se practicaron 14 anastomosis enteroentéricas, 5 anastomosis colocólicas y 4 anastomosis ileocólicas, y en 3 pacientes no se pudo hacer anastomosis. En promedio, hubo 4 laparotomías múltiples programadas por paciente que se realizaron cada 24 horas antes de la anastomosis. El éxito primario se logró en 20 pacientes (77 porciento). La supervivencia a los 28 días fue de 88,4 porciento, 23 pacientes egresaron vivos y sólo 3 (11,5 porciento) fallecieron en la unidad de cuidados intensivos; estas muertes fueron independientes del procedimiento.Discusión. En pacientes con peritonitis secundaria grave la estrategia de control de daños fue viable y segura, con un éxito primario de 77 porciento, con fístula en 11,5 porciento, y mortalidad de 11,5 porciento.