A study of the effectiveness of the bilateral and contralateral occult inguinal hernia repair by total extraperitoneal repair with intraperitoneal examination

Purpose: Of the various methods used, the laparoscopic surgical repair of inguinal hernias is widely performed. We aimed to estimate the incidence of bilateral and contralateral occult inguinal hernias in our surgical population and to compare the results of total extraperitoneal repair (TEP) for bilateral and unilateral inguinal hernias, occult and non-occult hernias. Methods: We retrospectively reviewed data of patients who underwent TEP for the repair of adult inguinal hernias from January 2012 to November 2018 in our hospital. Results: Of the data of 259 patients included, 134 (51.7%) and 125 (48.3%) had unilateral and bilateral inguinal hernias, respectively, while 70 patients (27%) were found to have a contralateral occult inguinal hernia, intraoperatively. The mean operative time was 129 +/- 48 minutes (range, 43-300 minutes) and 167 +/- 55 minutes (range, 85-390 minutes) for the unilateral and bilateral groups, respectively, indicating a significantly longer duration of surgery for the bilateral group (P < .05). Recurrence occurred in 1.5% (5/134) and 0.4% (1/250) of the operated hernias in the unilateral and the bilateral groups, respectively, indicating a significantly lower rate of recurrence in the latter group (P < .05). The two groups showed no statistically significant differences with respect to the remaining perioperative data. The incidence of postoperative complications in occult hernias was not significantly different from that in non-occult hernias. Conclusions: Our TEP method, involving a laparoscopic exploration from the intraperitoneal side, can be safely and effectively utilized for the repair of both bilateral and contralateral occult inguinal hernias.