Objective: To review the patient characteristics and clinical symptoms, intraoperative finding and management, including morbidity and mortality rate of obturator hernia cases.

Material and Method: A retrospective study was performed in 61 patients diagnosed as obturator hernia at Chiangrai Regional Hospital between January 2000 and December 2005.

Results: The incidence of obturator hernia is 61 of 2,828 cases (2.2%) of all hernias, female:male 6.6:1. The mean age was 72.85 years. The mean body weight was 35.72 Kg. Howship-Romberg’s sign were positive in eight patients (13.11%). Thirty-five patients (57.38%) were Richter type hernia, left:right side 3:2. Strangulation of bowel occurred in 41 patients (67.21%) Mortality rate was 11.47%. All patients with postoperative complications and all deaths showed bowel strangulation and all were more than 70 years of age.

Conclusion: In the present study, the authors found a high incidence of obturator hernia (2.2% of all hernias) compared with a previous report (0.05%-1.4% of all hernias). This high incident rate might relate to the specific local life style of people in Chiangrai as most patients had a habit of smoking. Chronic obstructive pulmonary disease (COPD), old age, and low body weight were possible contributing factors. Bowel strangulation and age more than 70 years old were associated with morbidity and mortality.

Keywords: Obturator hernia, Howship-Romberg’s sign, Intestinal obstruction