E Gonzalez-Díaz1, L Moreno Cea, A Fernández Corona. 1. Pelvic Floor Unit, Department of Obstetrics and Gynaecology, Complejo Asistencial Universitario of León (CAULE), C/ Altos de Nava S/N, 24080, León, Spain, enriquegonzalezdiaz@hotmail.com.
Abstract
INTRODUCTION AND HYPOTHESIS: The objective of this study was to investigate the association between the trigonometric properties of episiotomy in operative vaginal delivery (OVD) and obstetric anal sphincter injuries (OASIS). METHODS: The study included 72 primiparous women who had an OVD and episiotomy. Cases (n = 36) had sustained OASIS at birth, while controls (n = 36) had not. The groups were matched for instrumental delivery. The episiotomy scar was identified and its trigonometric characteristics were measured at 8-12 weeks postpartum. Data were analysed using conditional logistic analysis. RESULTS: The angle of episiotomy behaves as a factor associated with anal sphincter injury, so women with a mediolateral episiotomy and an angle greater than 20° have an 87% less risk of having an OASIS (odds ratio 0.13, 95% confidence interval 0.03-0.58). The study showed that scarred episiotomies at 8-12 weeks after OVD with an angle ≤ 20°, depth and distance between the episiotomy and anus ≤ 15 mm, total upper triangle perimeter ≤ 75 mm, para-anal triangle perimeter ≤ 15 mm and areas between scar and midline ≤ 250 mm(2) were significantly associated with higher risk of OASIS. CONCLUSIONS: When a mediolateral episiotomy is performed in OVD the technique has a strong effect on the occurrence of OASIS. Additional research is needed to determine if the optimal technique for mediolateral episiotomies produces less OASIS than deferring the performance of episiotomy.
INTRODUCTION AND HYPOTHESIS: The objective of this study was to investigate the association between the trigonometric properties of episiotomy in operative vaginal delivery (OVD) and obstetric anal sphincter injuries (OASIS). METHODS: The study included 72 primiparous women who had an OVD and episiotomy. Cases (n = 36) had sustained OASIS at birth, while controls (n = 36) had not. The groups were matched for instrumental delivery. The episiotomy scar was identified and its trigonometric characteristics were measured at 8-12 weeks postpartum. Data were analysed using conditional logistic analysis. RESULTS: The angle of episiotomy behaves as a factor associated with anal sphincter injury, so women with a mediolateral episiotomy and an angle greater than 20° have an 87% less risk of having an OASIS (odds ratio 0.13, 95% confidence interval 0.03-0.58). The study showed that scarred episiotomies at 8-12 weeks after OVD with an angle ≤ 20°, depth and distance between the episiotomy and anus ≤ 15 mm, total upper triangle perimeter ≤ 75 mm, para-anal triangle perimeter ≤ 15 mm and areas between scar and midline ≤ 250 mm(2) were significantly associated with higher risk of OASIS. CONCLUSIONS: When a mediolateral episiotomy is performed in OVD the technique has a strong effect on the occurrence of OASIS. Additional research is needed to determine if the optimal technique for mediolateral episiotomies produces less OASIS than deferring the performance of episiotomy.
Authors: Joey de Vogel; Anneke van der Leeuw-van Beek; Dirk Gietelink; Marijana Vujkovic; Jan Willem de Leeuw; Jeroen van Bavel; Dimitri Papatsonis Journal: Am J Obstet Gynecol Date: 2012-03-15 Impact factor: 8.661
Authors: Danielle K Garner; Akash B Patel; Jun Hung; Monica Castro; Tamar G Segev; Jeffrey H Plochocki; Margaret I Hall Journal: Diagnostics (Basel) Date: 2021-02-02