Pilsner Modification of Mesh Sacrohysterocolpopexy (PiMMS): An Initial Report on Safety and Efficacy.

INTRODUCTION AND HYPOTHESIS: It is reported that up to 60% of women would prefer to spare their uterus during pelvic organ prolapse (POP) repair surgery. A reliable hysteropexy technique is therefore crucial. We aimed to describe the safety profile and initial core patient-reported and clinical outcomes of the Pilsner modification of laparoscopic mesh sacrohysterocolpopexy (PiMMS) in comparison with the laparoscopic sacrohysterocolpopexy technique (standard laparoscopic sacrohysterocolpopexy [sLSH]) previously used in our unit. METHODS: This was a retrospective cohort study conducted in a single tertiary referral urogynecological center. All patients who underwent laparoscopic mesh sacrohysterocolpopexy between 1 January 2015, and 31 January 2022 were included in the study. Follow-up clinical, patient-reported, and imaging outcomes at the 12-month follow-up time point are presented. RESULTS: A total of 87 patients were included. Of these, 49 (56.3%) and 38 (43.7%) underwent sLSH and PiMMS respectively. Low numbers of perioperative complications were found in both groups with no mesh-related complications reported following PiMMS up to 12 months postoperatively. There were no apical compartment failures in either group. There were 8 (17.0%) vs 1 (2.7%) anterior compartment failures (Ba ≤ -1) in the sLSH and PiMMS groups respectively (p = 0.07) at 12 months. At the 1-year follow-up, 42 (89.4%) patients reported a Patient Global Impression of Improvement score of ≤ 2 in the sLSH groups compared with 35 (94.6%) patients following PiMMS. CONCLUSIONS: The PiMMS technique seems to have comparable safety profile and patient-reported outcomes with the sLSH technique. However, there is a trend toward reduced anterior compartment failures with this modification. The findings of this preliminary report need to be re-evaluated in a well-powered prospective study.

A Comprehensive Evaluation of Sexual Life in Women After Laparoscopic Sacrocolpopexy using PISQ-IR.

INTRODUCTION AND HYPOTHESIS: Although laparoscopic sacrocolpopexy is a recommended procedure for sexually active women, its full impact on sexual life remains underexplored. This study is aimed at comprehensively assessing changes in the quality of sexual life and the prevalence of dyspareunia in women 1 year after laparoscopic sacrocolpopexy. METHODS: This prospective observational study enrolled women undergoing laparoscopic sacrocolpopexy for pelvic organ prolapse stage≥ 2. Included were women with a completed Pelvic Organ Prolapse/Incontinence Sexual Questionnaire, IUGA Revised (PISQ-IR) questionnaire before and at 1 year after surgery. Individual domains of the PISQ-IR were compared separately. Dyspareunia, single summary PISQ-IR and PISQ-12 scores were additionally compared in sexually active women. Statistical analyses included paired signed rank, Wilcoxon, Median, Chi-squared, and Fisher tests (p < 0.05). RESULTS: Between February 2015 and December 2019, a total of 333 women were included. Mean age was 61.0 ± 11.2 and 141 (42%) reported being sexually active at baseline. At 12 months postoperatively, sexual activity was preserved in 110 (78%) of these women and an additional 26 women (14%) became sexually active. Both single-summary PISQ-IR (3.4 vs 3.6, p < 0.01) and PISQ-12 (36.0 vs 38.1, p < 0.01) scores increased significantly. The only variable that was associated with deteriorated scores postoperatively was a higher BMI. Individual domain analyses revealed significant improvement in condition-specific and condition-impact domains, except for the desire domain, which deteriorated. Prevalence of dyspareunia decreased post-surgery from 21.8% to 16.4%, p < 0.05. Newly sexually active women were older, had shorter vaginal length preoperatively, but lower PISQ-IR scores postoperatively than sexually inactive women pre- and postoperatively. Women ceasing sexual activity were older and had lower preoperative PISQ-IR scores than sexually active women pre- and postoperatively. CONCLUSIONS: Although the overall rate of sexually active women and sexual desire declined 12 months after sacrocolpopexy, overall sexual function scores improved and the prevalence of dyspareunia decreased.

Importance of vaginal packing after laparoscopic sacrocolpopexy - retrospective study.

OBJECTIVE: To compare the subjective and objective results of laparoscopic sacrocolpopexy (LSC) with and without the introduction of a vaginal packing one year after surgery. Methodology: This is a retrospective cohort study of 125 women after laparoscopic sacrocolpopexy operated on in 2013-2016 with complete annual follow-up. Patients with a total hysterectomy were excluded from the study. Basic patient characteristics, preoperative POP-Q and surgery data were collected. The subjective outcome of the surgery was assessed using the PGI-I (patient global impression of improvement). The anatomic outcome of the surgery was evaluated using the composite definition of surgical failure based on POP-Q (Ba ≥ -1, C ≥ -3, Bp ≥ -1). Patients were divided into two groups according to whether or not they had vaginal packing after surgery. Statistical analysis was performed using c2, Wilcoxon and Fischer test according to the distribution of normality. Results: A total of 125 women were enrolled in the study; 48 (38.4%) after LSC, 58 (46.4%) with concomitant supracervical hysterectomy and 19 (15.2%) after sacrohysterocolpopexy. Vaginal packing was introduced for 24-48 hours after surgery in 86 (68.8%) women. The groups did not differ in age, body mass index, smoking or preoperative pelvic organ prolapse quantification system. We did not observe statistically significant differences in PGI-I first year after surgery. The difference in anatomic surgical failure did not reach statistical significance, although more failures were observed in the group without packing (12.8 vs. 3.5%; P = 0.09). The mean C-point value one year after surgery was lower in the non-tamponade group (-7 vs. -7.5; P < 0.009). No mesh extrusion or serious complications were recorded in the monitored group. Conclusion: Vaginal packing after LSC probably does not affect patient satisfaction after surgery, however, it may be associated with better anatomical outcome one year after the surgery. The results of the study must be confirmed by a more detailed prospective evaluation.

Relationship between urethrovesical junction mobility changes and postoperative progression of stress urinary incontinence following sacrospinous ligament fixation - a subanalysis of a multicentre randomized study.

OBJECTIVES: The study aimed to assess the relationship between urethrovesical junction (UVJ) descent and development of de novo stress urinary incontinence (SUI) and postoperative progression of preexisting SUI following surgery for pelvic organ floor prolapse using the method of sacrospinal fixation (SSF). This was a secondary analysis of the SAME prospective randomized multicentre study (reg. no. NCT03053479) comparing three approaches to surgery for apical defects - sacropexy, SSF and transvaginal mesh. METHODS: The subanalysis included 81 patients with apical defects managed by SSF, either right-sided (N = 14, 17.3%) or bilateral (N = 67, 82.7%). Postoperative follow-up was assessed at 3 months (N = 59), 12 months (N = 47) and 24 months (N = 30). UVJ mobility at rest and with maximum effort, the Valsalva manoeuvre was determined using a standardized 3D/ 4D transperineal ultrasound protocol proposed by Dietz et al. De novo SUI and postoperative progression of preexisting SUI were ascertained from history. RESULTS: Preoperative demographic data (N = 81) were as follows: BMI 27.3 kg/ m2 (16.8-44.5), age 67.0 years (31-85), and parity 2 (1-6). Concomitant anterior repair was performed in 65.4%. Postoperative progression of SUI was 45.8% at 3 months, 21.3% at 12 months, and 23.3% at 24 months. There were significant differences between preoperative and postoperative UVJ descent values at 3, 12 and 24 months (P < 0.0001). Correlations between UVJ descent at 3, 12 and 24 months postoperatively and de novo SUI or progression of preexisting SUI at 3, 12 and 24 months postoperatively were not statistically significant (P = 0.051-0.883). Correlations between differences (preoperative UVJ descent minus UVJ descent at 3, 12 and 24 months postoperatively) and de novo SUI or progression of preexisting SUI at 3, 12 and 24 months postoperatively were not statistically significant (P = 0.691-0.779). CONCLUSIONS: The study showed significant changes in UVJ descent values preoperatively and at 3, 12 and 24 months after SSF. There were no significant correlations between UVJ descent and de novo SUI and postoperative progression of preexisting SUI following surgery for pelvic organ floor prolapse at 3-, 12- and 24-month follow-up. There were no signifi cant correlations between differences (preoperative UVJ descent minus UVJ descent at 3, 12 and 24 months postoperatively and de novo SUI and postoperative progression of preexisting SUI following surgery for pelvic organ floor prolapse at 3-, 12- and 24-month follow-up.

Timing of caesarean section and its impact on levator ani musle avulsion at the first subsequent vaginal birth - a pilot study.

OBJECTIVE: The aim of this multicentric observational study was to explore the impact of the timing of cesarean section (SC) on levator (MLA - levator ani musle) avulsion at the first subsequent vaginal birth. METHODS: All women after term vaginal birth following a cesarean section (VBAC) for their second delivery at the Departments of Gynecology and Obstetrics, Faculty of Medicine, Charles University and University Hospital in Pilsen and the 1st Faculty of Medicine, Charles University and General Hospital in Prague, between 2012 and 2016 were identified. Hospital database and surgical notes were used to collect basic characteristics of the patients including the indication and course of their previous delivery. These women were divided into two groups according to indication of prior SC in the previous delivery to women with elective SC and acute SC. All participants were invited for a 4D pelvic floor ultrasound to assess levator trauma. Levator avulsion and the levator hiatus area were assessed off-line from the stored pelvic floor volumes. Data were statistically assessed. RESULTS: A total of 356 women had a VBAC for their second delivery during the study period. Of these, 152 (42.7%) attended the ultrasound examination and full data were available for 141 women for statistical analyses. These were further divided into 80 women after acute SC and 61 women after elective SC. The levator avulsion rate was higher in the elective SC subgroup, but the difference was not significant (26.3 vs. 41.0%, P = 0.0645). No statistical differences in urogenital hiatus enlargement and ballooning were observed. CONCLUSION: VBAC is associated with a significantly higher rate of levator ani avulsion compared to the first vaginal birth in nulliparous women. However, it seems that risk of levator ani avulsion doesnt depend on the timing of SC in previous labor. More studies are needed to confirm the results of this pilot study.

Contribution of ultrasound examination in the detection of unexpected uterine and adnexal findings in reconstructive surgery for pelvic organ prolapse.

Objective: Current urogynaecology practice allows preservation of the uterus in pelvic organ prolapse (POP) surgery, thus not reducing oncologic risk. AIM: The aim of the study was to evaluate the efficacy of ultrasound (USG) in dia-gnosing unexpected uterine and adnexal pathologies in women referred for POP. Furthermore, the benefit of USG examination by a specialist in gynaecology-oncology ultrasound was assessed. MATERIALS AND METHODS: All women after a hysterectomy with or without adnexectomy in the course of a POP surgery at our tertiary centre in 2013-2018 with preoperative USG were enrolled in the study. Women with recurrent uterine bleeding, abnormal cytology, using tamoxifen, or women with already dia-gnosed uterine or adnexal pathology were excluded. RESULTS: 289 women were enrolled in the study - 157 (54.3%) expert USG vs. 132 (45.7%) non-expert USG. Abnormal findings were observed on the cervix in one case (non-expert USG), the endometrium 30 (10.4%) cases - 13 (8.3%) expert vs. 17 (12.9%) non-expert USG, the adnexa three (2.3%) cases (all non-expert USG), and no suspicion of malignancy on myometrium was observed. USG was false negative in four (1.4%) cases - two (1.3%) expert vs. two (1.5%) non-expert USG. Conversely, the examination was false positive in 34 (11.8%) cases - 13 (8.3%) expert vs. 21 (15.9%) non-expert USG. CONCLUSION: The risk of unexpected uterine or adnexal pathologies in POP surgery was 1.4%. The agreement between USG and histopathological benign, abnormal or malign findings was 87.2%. A sonographer specialized in oncologic sonography is able to reduce the number of false positive findings; however, this does not increase the sensitivity of the ultrasound.

European guidelines on perinatal care- Peripartum care Episiotomy.

OF RECOMMENDATIONS1. Episiotomy should be performed by indication only, and not routinely (Moderate quality evidence +++-; Strong recommendation). Accepted indications for episiotomy are to shorten the second stage of labor when there is suspected fetal hypoxia (Low quality evidence ++-; Weak recommendation); to prevent obstetric anal sphincter injury in vaginal operative deliveries, or when obstetric sphincter injury occurred in previous deliveries (Moderate quality evidence +++-; Strong recommendation)2. Mediolateral or lateral episiotomy technique should be used (Moderate quality evidence +++-; Strong recommendation). Labor ward staff should be offered regular training in correct episiotomy techniques (Moderate quality evidence +++-; Strong recommendation).3. Pain relief needs to be considered before episiotomy is performed, and epidural analgesia may be insufficient. The perineal skin needs to be tested for pain before an episiotomy is performed, even when an epidural is in place. Local anesthetics or pudendal block need to be considered as isolated or additional pain relief methods (Low quality evidence ++-; Strong recommendation).4. After childbirth the perineum should be carefully inspected, and the anal sphincter palpated to identify possible injury (Moderate quality evidence +++-; Strong recommendation). Primary suturing immediately after childbirth should be offered and a continuous suturing technique should be used when repairing an uncomplicated episiotomy (High quality evidence ++++; Strong recommendation).

A global perspective on management of bacterial infections in pregnancy: a systematic review of international guidelines.

INTRODUCTION: Maternal sepsis is a leading cause of maternal and neonatal mortality. Despite the availability of management protocols, there is disparity in case fatality rates for pregnancy-related sepsis compared to other maternity-related complications. The main aim of this systematic review was to assess concordance between international evidence-based guidelines for the prevention and management of childbirth-related bacterial infections. MATERIAL AND METHODS: The PRISMA statement was followed during the conduct and reporting of this review. PubMed was searched electronically from 2009 to November 2019 for clinical guidelines covering the topic of childbirth-related infections and specific searches for relevant guidelines on the websites of the top five international professional bodies most commonly identified by our searches. We did not apply any language restrictions. Guidelines were included if they provided any information about the prevention or management of childbirth-related bacterial infections irrespective of whether the guideline stated a recommendation or not. Two independent reviewers undertook study selection, decisions about inclusion of selected guidelines and data extraction. Extracted information was synthesized under the following topics: Asymptomatic bacteriuria; group B streptococcal infection (GBS); preterm premature rupture of membranes (P-PROM); intrauterine infection; procedures; maternal sepsis; miscellaneous. Concordance was defined as absence of contradictory information between the different guidelines with regards to a specific topic, subtopic or recommendation. Quality of included guidelines was assessed against the AGREE II guideline reporting domains. RESULTS: A total of 43 guidelines were selected of which 11 were excluded leaving 32 guidelines that fulfilled our inclusion criteria. None of the guidelines fulfilled all the quality assessment domains and 11 (34%) of the guidelines satisfied 1-2 of domains only. Two guidelines covered the topic of asymptomatic bacteriuria, nine for GBS, five for P-PROM and three covered each of intra-amniotic infections maternal sepsis, obstetric procedures and interventions topics. The remaining guidelines covered miscellaneous topics. CONCLUSIONS: There was concordance between guidelines with regards to several aspects in the prophylaxis and treatment of bacteriological infections in pregnancy. Nevertheless, there were several areas of discordance, some of which reached the extent of contradictory information as in the case of antenatal screening for GBS.

Musculoskeletal lower back load of accoucheurs during childbirth - A pilot and feasibility study.

INTRODUCTION: Back problems represent one of the leading causes of accouchers' work-related musculoskeletal morbidities. The correct execution of birth-related maneuvers including manual perineal protection is crucial not only for the mother and child but also for obstetricians and midwives to reduce any strain on their musculoskeletal system. Therefore, the overall aim of this study was to test the feasibility of determining the effect of different accouchers' postures (standing and kneeling) on their musculoskeletal system. METHODS: The biomechanical analysis is based on musculoskeletal simulations that included motion recordings of real deliveries as well as deliveries conducted on a birthing simulator. These simulations were then used to determine individual joints' loads. RESULTS: In the kneeling posture, both a low intra-operator variability and a lower average maximum load of the lower back was observed. For the standing position the spine load was reduced by pivoting the elbow on the accouchers' thigh, which in turn was associated with a significantly greater load on the shoulder joint. CONCLUSION: The study demonstrated the feasibility of our technique to assess joints loads. It also provided initial data indicating that a posture that reduces spinal flexion and tilt, achieved in this study by the kneeling, can significantly reduce the strain on the practitioner's musculoskeletal system.

Finite element modeling of maximum stress in pelvic floor structures during the head expulsion (FINESSE) study.

INTRODUCTION AND HYPOTHESIS: Several studies have assessed birth-related deformations of the levator ani muscle (LAM) and perineum on models that depicted these elements in isolation. The main aim of this study was to develop a complex female pelvic floor computational model using the finite element method to evaluate points and timing of maximum stress at the LAM and perineum in relation to the birth process. METHODS: A three-dimensional computational model of the female pelvic floor was created and used to simulate vaginal birth based on data from previously described real-life MRI scans. We developed three models: model A (LAM without perineum); model B (perineum without LAM); model C (a combined model with both structures). RESULTS: The maximum stress in the LAM was achieved when the vertex was 9 cm below the ischial spines and measured 37.3 MPa in model A and 88.7 MPa in model C. The maximum stress in the perineum occurred at the time of distension by the suboocipito-frontal diameter and reached 86.7 MPa and 119.6 MPa in models B and C, respectively, while the stress in the posterior fourchette caused by the suboccipito-bregmatic diameter measured 36.9 MPa for model B and 39.8 MPa for model C. CONCLUSIONS: Including perineal structures in a computational birth model simulation affects the level of stress at the LAM. The maximum stress at the LAM and perineum seems to occur when the head is lower than previously anticipated.

Pelvic organ prolapse and uterine preservation: a cohort study (POP-UP study).

BACKGROUND: Abdominal and laparoscopic sacro-colpopexy (LSC) is considered the standard surgical option for the management of a symptomatic apical pelvic organ prolapse (POP). Women who have their uterus, and for whom an LSC is indicated, can have a laparoscopic sacro-hysteropexy (LSH), a laparoscopic supra-cervical hysterectomy and laparoscopic sacro-cervicopexy (LSCH + LSC) or a total laparoscopic hysterectomy and laparoscopic sacro-colpopexy (TLH + LSC). The main aim of this study was to compare clinical and patient reported outcomes of uterine sparing versus concomitant hysterectomy LSC procedures. METHODS: A retrospective analysis of clinical, imaging and patient reported outcomes at baseline, 3 and 12 months after LSH versus either LSCH + LSC or TLH + LSC between January 2015 and January 2019 in a tertiary referral urogynecology center in Pilsen, the Czech Republic. RESULTS: In total, 294 women were included in this analysis (LSH n = 43, LSCH + LSC n = 208 and TLH + LSC n = 43). There were no differences in the incidence of perioperative injuries and complications. There were no statistically significant differences between the concomitant hysterectomy and the uterine sparing groups in any of the operative, clinical or patient reported outcomes except for a significantly lower anterior compartment failure rate (p = 0.017) and higher optimal mesh placement rate at 12 months in women who had concomitant hysterectomy procedures (p = 0.006). CONCLUSION: LSH seems to be associated with higher incidence of anterior compartment failures and suboptimal mesh placement based on postoperative imaging techniques compared to LSC with concomitant hysterectomy.

Feasibility and safety of antepartum tactile imaging.

INTRODUCTION AND HYPOTHESIS: Quantitative characterization of the birth canal and critical structures before delivery may provide risk assessment for maternal birth injury. The objective of this study was to explore imaging capability of an antepartum tactile imaging (ATI) probe. METHODS: Twenty randomly selected women older than 21 years with completed 35th week of pregnancy and a premise of vaginal delivery were enrolled in the feasibility study. The biomechanical data were acquired using the ATI probe with a double-curved surface, shaped according to the fetal skull and equipped with 168 tactile sensors and an electromagnetic motion tracking sensor. Software package COMSOL Multiphysics was used for finite element modeling. Subjects were asked for assessment of pain and comfort levels experienced during the ATI examination. RESULTS: All 20 nulliparous women were successfully examined with the ATI. Mean age was 27.8 ± 4.1 years, BMI 30.7 ± 5.8, and week of pregnancy 38.8 ± 1.4. Biomechanical mapping with the ATI allowed real-time observation of the probe location, applied load to the vaginal walls, and a 3D tactile image composition. The nonlinear finite element model describing the stress-strain relationship of the pelvic tissue was developed and used for calculation of Young's modulus (E). Average perineal elastic modulus was 11.1 ± 4.3 kPa, levator ani 4.8 ± 2.4 kPa, and symphysis-perineum distance was 30.1 ± 6.9 mm. The pain assessment level for the ATI examination was 2.1 ± 0.8 (scale 1-4); the comfort level was 2.05 ± 0.69 (scale 1-3). CONCLUSIONS: The antepartum examination with the ATI probe allowed measurement of the tissue elasticity and anatomical distances. The pain level was low and the comfort level was comparable with manual palpation.

Pelvic organ prolapse and uterine preservation: a survey of female gynecologists (POP-UP survey).

BACKGROUND: The aim of this study was to explore the personal views of female gynecologists regarding the management of POP with a particular focus on the issue of uterine sparing surgery. METHODS: A questionnaire based survey of practicing female gynecologists in the Czech Republic, Slovenia and Slovakia. RESULTS: A total of 140 female gynecologists from 81 units responded to our questionnaire. The majority of respondents stated they would rely on a urogynecologist to aid them with their choice of POP management options. The most preferred options for POP management were sacrocolpopexy and physiotherapy. Almost 2/3 of respondents opted for a hysterectomy together with POP surgery, if they were menopausal, even if the anatomical outcome was similar to uterine sparing POP surgery. Moreover, 81.4% of respondents, who initially opted for a uterine sparing procedure, changed their mind if the anatomical success of POP surgery with concomitant hysterectomy was superior. Discussing uterine cancer risk in relation to other organs had a less significant impact on their choices. CONCLUSIONS: The majority of female gynecologists in our study opted for hysterectomy if they were postmenopausal at the time of POP surgery. However, variation in information provision had an impact on their choice.

Trans-obturator cystocele repair of level 2 paravaginal defect.

INTRODUCTION AND HYPOTHESIS: It is reported that almost one in five women will need some form of pelvic organ prolapse surgery in their lifetime, with anterior wall repair accounting for nearly half of these. Cystoceles occur secondary to defect(s) in one or more of the vaginal wall support mechanisms, including its lateral paravaginal attachments. Paravaginal defects are very common in women presenting with cystocele, thus highlighting the importance of paravaginal defect repair for optimal cystocele correction in the majority of cases. Although there are several paravaginal defect repair procedures, some entail complex techniques, whereas others rely on the use of transvaginal mesh, which is currently not permitted in many countries. METHODS: In this video article we present a novel trans-obturator native tissue paravaginal defect repair for the management of cystocele. RESULTS: This procedure has the advantages of avoiding complex transabdominal paravaginal defect repair, the controversial use of transvaginal mesh, or a single-point fixation to an arcus tendineus fasciae pelvis that might be difficult to identify. CONCLUSION: We believe that the trans-obturator cystocele repair procedure offers several advantages over existing paravaginal defect repair alternatives.

Metrics of perineal support (MOPS) study.

BACKGROUND: Manual perineal protection (MPP) is an intrapartum intervention suggested to protect perineal integrity during childbirth. Proper execution of MPP is complex and evaluation of its true contribution is difficult in the clinical setting because of the large number of obstetric variables, some of which are hardly quantifiable. In this study we aimed to gather initial data on the forces executed by the accoucheur's thumb, index and middle fingers during MPP at the time of fetal head expulsion, quantify the duration of the intervention and investigate the timely interaction of the different components of MPP. METHODS: Two bespoke right-handed measurement gloves (MG), with built in sensors, were designed and produced. The MG allowed the electronic real-time measurement of applied forces during MPP and transferred this data wirelessly to an integrated computer system. Sterile gloves were worn over the MG when used at the time of birth. The study was undertaken between January and December 2019. Singleton, term pregnant women having their first vaginal birth who provided a valid written consent were enrolled into this prospective pilot study. All deliveries were undertaken by one of two obstetricians experienced in MPP. RESULTS: Twenty women were enrolled. The mean duration of execution of MPP during the last contraction was 13.6 s. In 20% it lasted < 5 s. The overall mean values of the average and maximum forces of the thumb, index and middle fingers were 26.7 N; 25.5 N; 20.2 N and 34.3 N; 32.6 N; and 27.6 N respectively. The onset of fingers and thumb activity was simultaneous in 13 cases (65%), while in seven (35%) deliveries the middle finger's force activity was initiated later. CONCLUSIONS: MPP during fetal head expulsion happens over a short period of time. In the majority of cases the thumb and fingers actions started simultaneously. There were differences in the duration of application and the forces executed by the fingers and thumb between the two practitioners, however this was only significant for thumb measurements. The results obtained will aid in improving further MPP modeling studies to optimize the technique.

Persistent occiput posterior position and stress distribution in levator ani muscle during vaginal delivery computed by a finite element model.

INTRODUCTION AND HYPOTHESIS: Objective of this study was to develop an MRI-based finite element model and simulate a childbirth considering the fetal head position in a persistent occiput posterior position. METHODS: The model involves the pelvis, fetal head and soft tissues including the levator ani and obturator muscles simulated by the hyperelastic nonlinear Ogden material model. The uniaxial test was measured using pig samples of the levator to determine the material constants. Vaginal deliveries considering two positions of the fetal head were simulated: persistent occiput posterior position and uncomplicated occiput anterior position. The von Mises stress distribution was analyzed. RESULTS: The material constants of the hyperelastic Ogden model were measured for the samples of pig levator ani. The mean values of Ogden parameters were calculated as: µ1 = 8.2 ± 8.9 GPa; µ2 = 21.6 ± 17.3 GPa; α1 = 0.1803 ± 0.1299; α2 = 15.112 ± 3.1704. The results show the significant increase of the von Mises stress in the levator muscle for the case of a persistent occiput posterior position. For the optimal head position, the maximum stress was found in the anteromedial levator portion at station +8 (mean: 44.53 MPa). For the persistent occiput posterior position, the maximum was detected in the distal posteromedial levator portion at station +6 (mean: 120.28 MPa). CONCLUSIONS: The fetal head position during vaginal delivery significantly affects the stress distribution in the levator muscle. Considering the persistent occiput posterior position, the stress increases evenly 3.6 times compared with the optimal head position.

Laparoscopic sacrohysteropexy: the Pilsner modification.

INTRODUCTION AND HYPOTHESIS: Laparoscopic sacrocolpopexy is the preferred contemporary procedure for the surgical management of a significant apical pelvic organ prolapse. In the presence of a uterus it is possible for the patient to have subtotal hysterectomy and cervicopexy, total hysterectomy with colpopexy or uterine conservation and hysteropexy. However, hysteropexy seems to be associated with a higher risk of anterior compartment failure compared with cervicopexy or colpopexy. It is not uncommon for an asymmetrically large anterior compartment defect to co-exist with a symptomatic apical pelvic organ prolapse. In a cervicopexy or colpopexy, this asymmetry can be balanced by creating a de novo vaginal apex from the superior part of the anterior vaginal wall. However in a hysteropexy the attachment of the base of the anterior mesh to the vagina and cervical isthmus limits the ability to do this. METHODS: In this video we present a solution where the shape of the posterior mesh is modified to include two horizontal arms that are passed through openings in the broad ligament and attached to the cervical isthmus anteriorly. RESULTS: This frees the anterior Y-shaped mesh to be fixed to the anterior vaginal wall only and hence provides the required tension to create the de novo apex. CONCLUSION: Prior to wide adoption, this technique should be further investigated in the context of robustly designed comparative studies.