Comparison of vaginal mesh extrusion rates between a lightweight type I polypropylene mesh versus heavier mesh in the treatment of pelvic organ prolapse

Robert D Moore, James C Lukban
International Urogynecology Journal 2012, 23 (10): 1379-86

INTRODUCTION AND HYPOTHESIS: The objective of the study was to compare extrusion (vaginal mesh exposure) rates in patients undergoing transvaginal prolapse repair with the trocar-based Apogee and/or Perigee devices (American Medical Systems, Minnetonka, MN, USA) using either the original type I polypropylene mesh (IntePro, American Medical Systems, Minnetonka, MN, USA) or a newer generation lightweight type I mesh (IntePro Lite, American Medical Systems, Minnetonka, MN, USA).

METHODS: Data were pooled from three similarly designed prospective multicenter studies evaluating the safety and efficacy of Perigee for correction of the anterior (AC) and/or Apogee to repair the posterior/apical (PC/A) compartments. The first two studies utilized IntePro (mesh density 50 g/m(2)) and the third utilized IntePro Lite (mesh density 25.2 g/m(2)). Data were pooled to form IntePro and IntePro Lite groups for comparison. Patient demographics were recorded. Risk factors for vaginal mesh exposure were also considered.

RESULTS: Two hundred and sixty-three patients were implanted with Perigee and/or Apogee with IntePro for a total of 371 heavier mesh implants (174 Perigee, 197 Apogee) compared to 86 patients who underwent Perigee and/or Apogee with IntePro Lite for a total of 116 lightweight mesh implants (60 Perigee, 56 Apogee). Demographics and potential risk factors for extrusion were compared between the two groups. Mean follow-up was 2.0 years and similar between the two groups. In the AC, there were 234 implants, with mesh extrusion occurring in 8.0 % following IntePro compared to 5.0 % following IntePro Lite (p = 0.57). In the PA/C, there were 253 implants, with mesh extrusion occurring in 13.7 % following IntePro compared to 7.1 % following IntePro Lite (p = 0.25). Overall mesh extrusion rates in 487 implants in all compartments were found to be 11.1 % with IntePro versus 6.0 % with IntePro Lite with an estimated odds ratio of 1.93 (95 % confidence interval 0.84-4.44, p = 0.12).

CONCLUSIONS: No statistically significant difference in extrusion rates were seen following use of IntePro versus IntePro Lite; however, the 46 % reduction in rate of mesh exposure observed in those receiving the lighter weight mesh may represent clinical importance.

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