Randomised controlled trial: standard lightweight mesh vs self-gripping mesh in Lichtenstein procedure

Introduction: Lichtenstein hernioplasty has been a gold standard of hernioplasty for 30 years now. However, the procedure may be followed by an unacceptably high rate of chronic pain, numbness and discomfort. Aim: To compare outcomes of Lichtenstein repair using a Parietene ProGrip self-fixing mesh versus the standard lightweight macroporous mesh. Material and methods: As many as 141 patients with unilateral primary inguinal hernia participated in this single-centre, randomised, prospective, single-blind (patient-blinded) study. Randomisation yielded two treatment groups: control group of 88 patients treated with Lichtenstein method using lightweight standard mesh (LS) and study group of 53 patients receiving treatment with self-fixing mesh (PG). Patients were followed up for 6 months. Primary outcome was the presence and severity of postoperative pain at discharge, at 30 days and 6 months post-procedure. Other study parameters were: duration of the procedure, duration of hospitalisation, presence of early and late complications, time needed to return to full activity and patient satisfaction. Results: No statistically significant differences in pain severity were demonstrated at discharge or at long-term follow-up. In the first 30 days post-procedure the patients in the PG group complained of pain of greater severity on the NRS (2.0 vs 1.4) (P = 0.0466). The duration of the procedure in the PG group was 9.4 minutes shorter than in the LS group (P = 0.0027). No statistically significant differences between the groups were found in other studied parameters. Conclusions: Self-fixing mesh can be safely used in inguinal canal repair procedures. It significantly shortened the duration of the procedure but at the same time did not reduce the severity of pain, including the rate of chronic postoperative inguinal pain.