Biologic Grafts for Use in Pelvic Organ Prolapse Surgery: a Contemporary Review

Robotic Sacrohysteropexy With Concurrent Rectopexy using Fascia Lata Graft

INTRODUCTION AND OBJECTIVE

There is limited data regarding the use of mesh for pelvic organ prolapse (POP) repair in young women of childbearing age who wish to preserve their uterus.¹ Sacrohysteropexy with concurrent rectopexy can be performed in this population with a biologic graft, to decrease the risk of contamination with colorectal surgery and allow for future pregnancy.^2-4 The objective of this video is to present the surgical management of prolapse repair in a young woman with uterine and rectosigmoid prolapse, causing rectal outlet obstruction.

MATERIALS AND METHODS

Our patient is a 21-year-old woman with over a decade of severe constipation. Her past medical history includes anxiety, depression and sexual abuse. She previously underwent robotic rectopexy for intra-rectal intussusception and mucosal prolapse with immediate improvement in her symptoms; however, two months after rectopexy, she suffered from persistent abdominal pain and severe difficulty passing stool. Dynamic resonance imaging demonstrated descent of the bladder with significant uterine prolapse, causing impingement of rectum and rectocele, blocking the evacuation of stool. The patient was thus indicated for concurrent sacrohysteropexy and rectopexy.

RESULTS

She underwent a robotic procedure. Given her age, in an effort to preserve future child-bearing potential, we performed the surgery with a biologic graft made of fascia lata. For the sacrohysteropexy, the graft was sutured to the posterior cervix. Intraoperatively she was noted to have an intact enterocele repair and posterior rectopexy from her previous surgery; however, there was an angulation at the recto sigmoid. This was corrected by performing a rectopexy to the fascia lata graft. She discharged home the day of surgery without incident.

CONCLUSION

Biologic grafts can be used for multi compartment prolapse repair in women of child-bearing age. Fascia lata provides a safe alternative to mesh to allow for future pregnancy. Also, sacrohysteropexy with concurrent rectopexy can be performed with same day discharge.

Six-year follow-up outcomes of the P(LLA-CL)/Fg bio-patch for anterior vaginal wall prolapse treatment

INTRODUCTION AND HYPOTHESIS

There were few data about the long-term outcomes of bio-compatible patches for pelvic organ prolapse (POP). The efficacy of poly (L-lactide-co-caprolactone) blended with fibrinogen [P(LLA-CL)/Fg] bio-patches were investigated for anterior vaginal wall prolapse treatment in a 6-year follow-up.

METHODS

The P(LLA-CL)/Fg bio-patch was fabricated through electrospinning. Nineteen patients with symptomatic anterior prolapse (Pelvic Organ Prolapse Quantification [POP-Q] stage ≥ 2) were treated with anterior pelvic reconstruction surgery using a P(LLA-CL)/Fg bio-patch and were followed up at 1, 2, 3, 6 months, and 6 years. The primary outcome was objective anatomical cure (anterior POP-Q stage ≤ 1). Secondary outcomes included complications, MRI evaluation, and scores of the Pelvic Floor Impact Questionnaire-7 (PFIQ-7) and the Pelvic Floor Distress Inventory-20 (PFDI-20).

RESULTS

The micro-morphology of the bio-patch resembled the extracellular matrix, which was suitable for the growth of fibroblasts. Sixteen (84.2%) patients were finally assessed, with a mean follow-up of 6.08 ± 0.18 years. The cure rate without anterior prolapse recurrence was 93.8% at 6 years. Compared with baseline, the POP-Q measurements of Aa, Ba, and C points and scores of PFIQ-7 and PFDI-20 manifested significant differences at all times (all p < 0.05). One (5.26%) case of bio-patch-related infection, 1 (5.26%) case of urinary retention, and no exposures and erosion occurred. MRI evaluation showed that the bio-patch gradually degraded to fragments at 1 month and was completely absorbed at 3 months.

CONCLUSIONS

Among long-term follow-ups, anterior pelvic reconstruction surgery with a P(LLA-CL)/Fg bio-patch demonstrated significant improvements in anatomical correction of anterior pelvic prolapse and pelvic function without severe morbidity.

Rabbit as an animal model for the study of biological grafts in pelvic floor dysfunctions

The aims of this study were to evaluate the feasibility of the New Zealand White (NZW) rabbit for studying implanted biomaterials in pelvic reconstructive surgery; and to compare the occurrence of graft-related complications of a commercial polypropylene (PP) mesh and new developed human dermal matrix implanted at vaginal and abdominal level. 20 white female NZW rabbits were randomized into two groups, experimental group (human acellular dermal matrices-hADM-graft) and control group (commercial PP graft). In each animal, grafts were surgically implanted subcutaneously in the abdominal wall and in the vaginal submucosa layer for 180 days. The graft segments were then removed and the surgical and clinical results were analyzed. The main surgical challenges during graft implantation were: (a) an adequate vaginal exposure while maintaining the integrity of the vaginal mucosa layer; (b) to keep aseptic conditions; (c) to locate and dissect the breast vein abdominal surgery; and (d) to withdraw blood samples from the ear artery. The most abnormal findings during the explant surgery were found in the PP group (33% of vaginal mesh extrusion) in comparison with the hADM group (0% of vaginal graft extrusion), p = 0.015. Interestingly, macroscopic observation showed that the integration of the vaginal grafts was more common in the hADM group (40%) than in the PP group, in which the vaginal mesh was identified in 100% of the animals (p = 0.014). The NZW rabbit is a good model for assessing materials to be used as grafts for pelvic reconstructive surgery and vaginal surgery. Animals are easily managed during the procedures, including surgical intervention and vaginal mucosa approach. Additionally, hADM is associated with fewer clinical complications, as well as better macroscopic tissue integration, compared to PP mesh.