Meta-analysis of the outcomes of Trans Rectus Sheath Extra-Peritoneal Procedure (TREPP) for inguinal hernia

Trans rectus sheath extra-peritoneal procedure (TREPP) for inguinal hernia repair under local anesthesia with sedation in the outpatient clinic: a feasibility study

BACKGROUND

The Trans Rectus Sheath Extra-Peritoneal Procedure (TREPP) is an open procedure in which the mesh is placed in the preperitoneal space and is therefore associated with less chronic post-operative inguinal pain. TREPP is primarily performed under general or spinal anesthesia, however, it is also possible to perform under sedation and local anesthesia with potentially advantages. This retrospective feasibility pilot study investigates the safety and efficiency of TREPP under local anesthesia in the outpatient clinic in comparison with Lichtenstein.

METHODS

Between 2019 and 2022, all patients who underwent an elective inguinal hernia repair under local anesthesia in the outpatient clinic operation theatre were assessed. 34 patients in the TREPP group and 213 patients in the Lichtenstein group were included. Outcomes were complications, operating time, theatre time, and early inguinal hernia recurrence within 8 weeks and 6 months post-operatively.

RESULTS

No significant differences in complications such as wound infection, hematoma, seroma, urine retention and early recurrence between TREPP and Lichtenstein were found. Post-operative pain at 8 weeks was not significantly higher after Lichtenstein (8.8% vs. 18.8%, P = 0.22). Operating time (21.0 (IQR: 16.0-27.3) minutes vs. 39.0 (IQR: 31.5-45.0) minutes, P < 0.001) and theatre time (37.5 (IQR: 30.8-42.5) minutes vs. 54.0 (IQR: 46.0-62.0) minutes, P < 0.001) was significantly shorter for TREPP.

CONCLUSION

This pilot study showed that TREPP appears to be feasible to perform safely under local anesthesia with comparable complication rates and substantially shorter operation time than Lichtenstein. These results justify further research with a larger study population and a longer period of follow up in order to provide firm conclusions.

Posterior mesh inguinal hernia repairs: a propensity score matched analysis of laparoscopic and robotic versus open approaches

PURPOSE

International guidelines suggest the use of lapro-endoscopic technique for primary unilateral inguinal hernia (IHR) because of lower postoperative pain and reduction in chronic pain. It is unclear if the primary benefit is due to the minimally invasive approach, the posterior mesh position or both. Further research evaluating posterior mesh placement using open preperitoneal techniques is recommended. A potential benefit of open preperitoneal repair is the avoidance of general anesthesia, as these repairs can be performed under local anesthesia. This study compares clinical and patient-reported outcomes after unilateral laparo-endoscopic, robotic, and open posterior mesh IHRs.

METHODS

We performed a propensity score matched analysis of patients undergoing IHR between 2012 and 2021 in the Abdominal Core Health Quality Collaborative registry. 10,409 patients underwent a unilateral IHR via a posterior approach. Hernia repairs were performed via minimally invasive surgery (MIS) which includes laparoscopic and robotic transabdominal preperitoneal (TAPP), laparoscopic totally extraperitoneal (TEP), or open transrectus preperitoneal/open preperitoneal (TREPP/OPP) approaches. Propensity score matching (PSM) utilizing nearest neighbor matching accounted for differences in baseline characteristics and possible confounding variables between groups. We matched 816 patients in the MIS cohort with 816 patients in the TREPP/OPP group. Outcomes included patient reported quality of life, hernia recurrence, and postoperative opioid use.

RESULTS

Improvement was seen after TREPP/OPP as compared to MIS IHR in EuraHS at 30 days (Median(IQR) 7.0 (2.0-16.64) vs 10 (2.0-24.0); OR 0.69 [0.55-0.85]; p = 0.001) and 6 months (1.0 (0.0-4.0) vs 2.0 (0.0-4.0); OR 0.63 [0.46-85]; p = 0.002), patient-reported opioid use at 30-day follow-up (18% vs 45% OR 0.26 [0.19-0.35]; p < 0.001), and rates of surgical site occurrences (0.8% vs 4.9% OR 0.16 [0.06-0.35]; p < 0.001). There were no differences in EuraHS scores and recurrences at 1 year.

CONCLUSIONS

This study demonstrates a potential benefit of open posterior mesh placement over MIS repair in short-term quality of life and seroma formation with equivalent rates of hernia recurrence. Further study is needed to better understand these differences and determine the reproducibility of these findings outside of high-volume specialty centers.