IntroductionAcute mechanical bowel obstruction is a common condition among surgical emergencies. It has high morbidity and creates a major burden financially due to its recurrent nature. Natural progression and risk factors of bowel obstruction have not been clearly defined, and the surgical approach to be adopted, timing of the intervention and procedures for preventing relapses are still issues that are being debated (1). The causes and therapeutic approaches of bowel obstruction vary (2). Previous studies carried out in different parts of Turkey reported that, although an increase was observed in the incidence of post-surgical adhesion related bowel obstruction in socioeconomically developed regions, incarcerated hernia was still the leading cause of bowel obstruction (3-6). Development of effective medical and surgical therapeutic approaches, combined with better diagnostic tests, have contributed significantly to the decrease in the incidence of complications and mortality and morbidity rates in patients with bowel obstruction (7,8). The purpose of the present Abstract Objective: The aim of this study was to investigate the factors affecting morbidity and mortality by evaluating the demographical, etiological and clinical characteristics of patients with mechanical bowel obstruction. Materials and Methods: Data for 171 mechanical bowel obstruction patients were evaluated retrospectively. The patients were assessed in mortality (n=21), morbidity (n=55) and recovery (n=95) groups. Results: Of the patients, 70% were men; and 27.4% were ≥55 years of age. While gender had no impact on mortality and morbidity, age did. Adhesion was observed to be the leading cause (45.6%) of mechanical bowel obstruction, followed by incarcerated hernia in 17.5%. Intestinal necrosis was associated with mortality but not with morbidity. Late presentation and multiple concomitant diseases had no impact on mortality but were associated with morbidity. The presence of a concomitant disease and leukocytosis or leukopenia had a significant impact on both mortality and morbidity. Conclusion: Older age and presence of a concomitant disease, leukocytosis or leukopenia were established to be associated with mortality and morbidity. Late presentation and multiple concomitant diseases were associated only with morbidity. The presence of intestinal necrosis was associated only with mortality. Establishing the risk factors well will be beneficial in lowering the incidences of morbidity and mortality. (JAEM 2012; 11: 1-5) Özet Amaç: Mekanik barsak tıkanıklığı tanısı konulmuş hastalarda demografik, etiyolojik ve klinik özellikler değerlendirilerek morbidite ve mortaliteyi etkileyen faktörlerin araştırılması amaçlandı. Gereç ve Yöntemler: Mekanik barsak tıkanıklığı tanısı alan 171 hastanın bilgileri retrospektif olarak değerlendirildi. Hastalar; mortalite grubu (n=21), morbidite grubu (n=55) ve şifa grubuna (n=95) ayrılarak değerlendirildi. Bulgular: Hastaların %70'i erkek olup, %27.4'ü ≥55 yaş idi. Cinsiyetin mortalite ve morbiditeye etkisi anla...