Comparison of balloon dissection and telescopic dissection of the preperitoneal space in laparoscopic totally extraperitoneal hernia repair: a systematic review and meta-analysis

Purpose: Safety in creating a preperitoneal space is crucial in laparoscopic totally extraperitoneal (TEP) hernia repairs. In this systematic review and meta-analysis, we compared the outcomes of balloon dissection and telescopic dissection in patients with inguinal or femoral hernias who underwent TEP hernia repair. Methods: We searched PubMed, Embase, Web of Science, and Cochrane databases for randomized controlled trials (RCTs) and prospective and retrospective studies published from inception to July 2022. Meta-analysis was performed using a random-effects model. The treatment outcome was measured using operation time, incidence of intraoperative hemorrhage, peritoneal laceration, conversion to other approaches, surgical site infection (SSI), hematoma, seroma formation, hernia recurrence, and postoperative pain. Results: Five RCTs, one prospective study, and two retrospective studies (in total, 936 patients) were included. No significant between-group differences were noted in operation time, SSI, hematoma, seroma, recurrence rate, and postoperative pain on days 1 and 7. The conversion rate was significantly lower in the balloon group than in the telescopic group (odds ratio, 0.34; 95% confidence interval, 0.15–0.81). Conclusions: Both balloon dissection and telescopic dissection are viable techniques for creating preperitoneal space in laparoscopic TEP hernia repair and have similar operation time, complication rate, and postoperative pain. Nevertheless, the conversion rate was lower in patients undergoing balloon dissection than in those undergoing telescopic dissection.