RT Generic T1 Diagnosis of Levator Ani Muscle Avulsion in Instrumented Delivery: Meta-analysis A1 Antonio Garcia-Mejido, Jose A1 Fernandez-Palacin, Ana A1 Lao-Pena, Carolina A1 Antonio Sainz-Bueno, Jose K1 assisted birth K1 birth K1 forceps K1 labor K1 operative K1 parturition K1 pelvic floor K1 perineum K1 transperineal K1 ultrasound K1 vacuum K1 ventouse K1 Pelvic floor K1 Vaginal delivery K1 Injury K1 Childbirth K1 Forceps K1 Trauma K1 Women K1 Impact K1 Prevalence K1 Morphology AB Objective: The objective of this meta-analysis was to establish the rates of levator ani muscle (LAM) avulsion in patients after forceps delivery (FD) and vacuum delivery (VD) as assessed by 3D/4D transperineal ultrasound. Methods: A systematic search was performed in the MEDLINE, PubMed, Google Scholar, and Embase databases up to December 31, 2021. Studies that studied primiparous women diagnosed with LAM avulsion by 3D/4D transperineal ultrasound in VD or FD were included. To do the meta-analysis, the jamovi project program version 2.2 (2021) was used. Results: The search yielded 1225 studies that met the MeSH criteria, of which 26 were included in the review. The estimated joint OR for VD vs. normal vaginal delivery (NVD) was 1.93 (95% CI: 1.31-2.86), for FD vs. NVD was 5.33 (95% CI: 3.78-8.11), and for FD vs. VD was 2.36 (95% CI: 1.46-3.84). Conclusions: Instrumented delivery with forceps or vacuum favors LAM avulsion. It is not possible to establish whether this injury is attributable to the specific instrument or to the type of delivery involved in the instrumentation itself. PB Imr press SN 0390-6663 YR 2022 FD 2022-04-01 LK http://hdl.handle.net/10668/21806 UL http://hdl.handle.net/10668/21806 LA en DS RISalud RD Apr 9, 2025