POP is a health and social problem that mainly affects middle-aged and elderly women. The number of people seeking treatment for pelvic floor dysfunction will rise by 45% in the next 30 years, according to data from the United Nations World Population Aging[11].
POP is classified as anterior, middle, and posterior pelvic defect or prolapse based on the location of the defect. The incidence of anterior pelvic prolapse is two and three times that of posterior as well as middle pelvic prolapse, respectively[12].
Autologous tissue repair and vaginal mesh implantation are the most common surgical treatments for anterior pelvic prolapse. According to the previous standard of anatomical structure recovery, the success rate of anterior pelvic autologous tissue repair is low and the recurrence rate is high. Because of its high recurrence rate and surgical failure rate, biological grafts and mesh are gradually used in the surgical treatment of anterior pelvic prolapse. Vaginal implantation of mesh can significantly improve the recovery rate of the anatomical structure of pelvic floor tissue, which is widely used in anterior pelvic prolapse, but it also brings a lot of mesh-related problems.
The definition of the success of POP surgery has always been controversial, and the different definitions directly affect the statistics of the success rate of POP surgery. Studies have shown that although the anatomical cure rate of anterior pelvic autologous tissue repair is low, it can well alleviate the symptoms of prolapse, and the incidence of complications is low[13]. Moreover, if the improvement of clinical symptoms and quality of life of patients is taken as the criteria for the success of POP, the success rate of anterior pelvic autologous tissue repair is considerable[14].
Patients with vaginal apical defects are often associated with anterior and posterior vaginal wall prolapse. Adequate vaginal apical support is the key to the operation of severe POP. The apical reduction can correct 50% of the anterior vaginal wall prolapse and 30% of the posterior vaginal wall prolapse[15].
Patients with POP often have multiple anatomical defects at the same time, so it is necessary to make a comprehensive evaluation before the operation to determine the location and degree of the defect and to select one or more classical surgical procedures to repair the defective tissue.
Sacrum fixation has always been considered the gold standard for the treatment of apical prolapse. However, in laparoscopic sacral fixation, the important anatomical structures such as the sigmoid colon, right ureter, hypogastric nerve, and anterior sacral vein are very close. Complications associated with these important structures may lead to adverse consequences. At the same time, laparoscopic sacrum fixation is a technically difficult surgical method. In 2011, Banerjee reported that laparoscopic pectopexy was used to treat POP. The laparoscopic synthetic mesh was used to symmetrically fix the vaginal stump or cervix to the lateral part of the bilateral iliopubic ligament at the S2 level, to restore the prolapsed vaginal tip or cervix to the normal anatomical position, correct and repair the defects of the pelvic floor, and achieve good clinical results. At present, many studies have shown that laparoscopic pectopexy has similar anatomical effects as sacral fixation[16, 17], shorter operation time, and lower incidence of complications, which can be used as a new method for the treatment of pelvic defects.
In our study, laparoscopic pectopexy combined with native tissue repair has achieved good results in the treatment of moderate and severe pelvic prolapse.
The results of this study showed that the anatomical reduction achieved ideal results 3 months after the operation, and the indication points of POP-Q were basically in the normal range compared with those before the operation. In this study, there was no recurrence of vaginal apical prolapse in 49 patients after the operation, only one patient developed de novo stress urinary incontinence one month after the operation. Because multiple operations were performed at the same time to correct and improve the pelvic floor function, the minimum total operation time was 125 minutes and the maximum was 270 minutes.
The exposure rate of transvaginal mesh placement for POP surgery was 4%-19%[18, 19], while the incidence of complications associated with abdominal placement of mesh was low[20]. No mesh exposure associated with synthetic mesh was reported during laparoscopic pectopexy. In our study, the mesh was only used for the treatment of apical prolapse, and there was no additional mesh for cystocele and rectocele repair. No mesh-related exposure was observed after 1-year follow-up.
Defecation problems and de novo stress urinary incontinence ranging from 17–37% and 4–50%, respectively, are the most frequently reported complications associated with sacrocolpopexy[7, 21]. No bowel injury was caused by suturing the mesh to the lateral side of the bilateral iliopubic ligament at the S2 level, and there was no symptom of defecation disturbance during the follow-up in this study.
Hysterectomy is widely believed to be an independent risk factor for recurrent vaginal vault prolapse. The main reason is the destruction of the integrity and continuity of the supporting tissue, such as the pubocervical and rectovaginal fascia. Hysterectomy itself may not correct the underlying problem of insufficient apical support[22, 23]. Therefore, whether the uterus should be removed is controversial. In our study, uterine preservation surgery was performed on all patients. The advantage of preserving the uterus is to maintain pelvic anatomy, reduce complications related to hysterectomy, reduce intraoperative blood loss, shorten operation time and hospital stay, reduce mesh erosion rate and increase patients' self-confidence, and provide physical and psychological benefits for women.
The purpose of the treatment of pelvic organ prolapse is to restore the normal anatomical position of pelvic organs, improve organ function and improve the quality of life of patients. Studies have shown that laparoscopic pectopexy can improve the quality of life after operation[17, 24]. In this study, the PFIQ-7 and PFDI-20 scores were compared before and 3 months after the operation, and the quality of life of the patients was significantly improved after treatment.
During the average follow-up period of 15 months, for pelvic organ prolapse of grade 2 and grade 3 or above, the application of mesh for top-supported pectopexy combined with natural tissue repair produced good clinical results, which provided a new choice for the clinic to reduce the use of mesh.
In conclusion, laparoscopic pectopexy combined with natural tissue repair is a safe and effective treatment in apical prolapse surgery with low complication rates and a short duration of the operation. Prospective randomized trials will permit the evaluation of the potential benefits as a minimally invasive surgical approach.