Helicobacter pylori (H. pylori) is known to be capable of causing chronic inflammation of the gastric mucosa that slowly progresses through the premalignant stages, reaching localized gastric adenocarcinoma (GAC). Its outcome is closely related to the stage at which diagnosis is made. The aim of the present study was to determine cost-benefit by comparing esophagogastroduodenoscopy, serum pepsinogen detection, and no screening at all. Utilizing Markov chains and Monte Carlo simulation, the costs and effects of various detection modalities were simulated to analyze the cost-benefit of each strategy. For our population, we used the published data of patients with gastric cancer, applicable to the Mexican population. The results were reported as incremental cost-effectiveness ratios. The best strategy was serum pepsinogen determination, followed by the strategy of endoscopic examination with continued monitoring every 3 years. The performance of serum pepsinogen serology and directed endoscopic examination (and continued monitoring, if necessary) for GAC screening could be a cost-effective intervention in Mexico, despite the low-to-moderate general prevalence of the disease.

Objetivo: Determinar los tiempos quirúrgicos estándar de los cuatro procedimientos más comunes en cirugía general (hernioplastia inguinal unilateral, hernioplastia inguinal bilateral, hernioplastia umbilical y colecistectomía) de un hospital de segundo nivel y calcular la probabilidad de extensión de cada uno de los procedimientos. La eficiencia es un fenómeno ampliamente estudiado en el ámbito económico, pues hace referencia a la necesidad de menor cantidad de factores para la producción de un determinado nivel de bienes y servicios, por ello, es de vital importancia incluirlo en el ámbito quirúrgico. Materiales y métodos: Estudio observacional, descriptivo y retrospectivo. Se utilizaron los registros de quirófano de un hospital de segundo nivel del año 2017 al 2019 del servicio de Cirugía General. A partir de esta información, se estandarizó el tiempo necesario para cada procedimiento mediante la media de cada uno (hernioplastia umbilical, hernioplastia inguinal unilateral o bilateral y colecistectomía). Se calculó la probabilidad de extensión de las cirugías tomando en consideración los datos obtenidos y el intervalo de confianza. Resultados: Para el procedimiento de hernioplastia inguinal unilateral se obtuvo una media de 76 min (IC 95,00 %: 72-80 min, DE 23); en hernioplastia inguinal bilateral, una media de 104,38 min (IC 95,00 %: 91-116 min, DE 41,7); en hernioplastia umbilical, una media de 59,31 min (IC 95,00 %: 54-63 min, DE 29,9), y en colecistectomía, una media de 85,735 min (IC 95,00 %: 83-88 min). La probabilidad de que se programen tres cirugías y todas estén a tiempo (límite superior del IC) es de 92,69 %, la probabilidad de que se programen tres cirugías y todas se prolonguen es de 0,0016 % (límite inferior del IC). Conclusiones: Es posible realizar la planeación de las cirugías programadas mediante el uso de tiempos quirúrgicos estandarizados. Se requiere contar con estadística actualizada de los procedimientos quirúrgicos (promedios del tiempo de realización de cada procedimiento), ya que es posible detectar y supervisar de manera más precisa la dinámica de quirófano mediante la detección de las áreas de oportunidad, de esta manera, se eficientizará el tiempo de quirófano para beneficio de los sistemas de salud y los pacientes.

Background: Intestinal failure (IF) was first defined as "a reduction in the functioning gut mass below the minimal amount necessary for adequate digestion and absorption." In our environment, there are no statistical data for IF in adult patients' extended length of stay (LOS), nor the economic impact that it implies. Objective: The objective of the study was to describe the association between the IF type and extended LOS. Methods: Patients admitted to our IF Unit between March 2016 and March 2018 were enrolled. We conducted a 2-year retrospective cross-sectional study. Results: From the total of 53 patients, 35% corresponded to type I IF, 58.5% to type II IF, and 7.5% to type III IF. The mean LOS, according to the type of functional IF was 51 days for type I, 7748 days for type II, and 68.25 days for type III. The mean LOS for the three IF types was 67.79 days. Conclusion: Extended LOS occurs in an important proportion of patients with IF, resulting in increased morbidity and mortality, as well as in costs and associated side effects. Future research should focus on economic studies, to know the economic impact that this subject entails for our health systems.

Helicobacter pylori (H. pylori) is known to be capable of causing chronic inflammation of the gastric mucosa that slowly progresses through the premalignant stages, reaching localized gastric adenocarcinoma (GAC). Its outcome is closely related to the stage at which diagnosis is made. The aim of the present study was to determine cost-benefit by comparing esophagogastroduodenoscopy, serum pepsinogen detection, and no screening at all. Utilizing Markov chains and Monte Carlo simulation, the costs and effects of various detection modalities were simulated to analyze the cost-benefit of each strategy. For our population, we used the published data of patients with gastric cancer, applicable to the Mexican population. The results were reported as incremental cost-effectiveness ratios. The best strategy was serum pepsinogen determination, followed by the strategy of endoscopic examination with continued monitoring every 3 years. The performance of serum pepsinogen serology and directed endoscopic examination (and continued monitoring, if necessary) for GAC screening could be a cost-effective intervention in Mexico, despite the low-to-moderate general prevalence of the disease.

No-fever, no-cough, no-fatigue Fever, cough, fatigue, cough with fatigue Fever with cough, fever with fatigue n progression/exposed (%) 23/914 (2) 66/615 (10.7) 31/106 (29) Days to progression 8 (5.5-9.5) 7 (5-9) 6 (4-7.5) Risk factors Male No 11/572 (2) 31/356 (9) 17/55 (31) Yes 12/342 (4) 35/259 (14) 14/51 (27)