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Eshkoli T, Baumfeld Y, Yohay Z, Binyamin Y, Speigel E, Dym L, Weintraub AY. Is epidural analgesia an independent risk factor for OASIS? A population-based cohort study. Arch Gynecol Obstet 2024; 309:2499-2504. [PMID: 37454350 DOI: 10.1007/s00404-023-07150-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Accepted: 07/07/2023] [Indexed: 07/18/2023]
Abstract
INTRODUCTION To evaluate whether epidural analgesia is an independent risk factor for OASIS. METHODS A population-based cohort study including all women who delivered by spontaneous vaginal delivery or by instrumental delivery beyond 24 weeks gestation was conducted. Deliveries occurred between 1988 and 2016 at a large university tertiary medical center. Women with multiple gestations and those lacking prenatal care were excluded from the analysis. RESULTS During the study period, 252,542 women delivered at the Soroka University Medical Center and met the inclusion criteria. Of these, 583 (0.23%) were diagnosed with OASIS. Women with OASIS were more likely to be younger, nulliparous, with suspected fetal macrosomia, had higher rates of labor induction and vacuum extraction delivery, higher rates of conceiving after infertility treatments, more advanced gestational age at delivery, higher mean birth weight, higher rates of post-partum hemorrhage and need for blood transfusions. Use of epidural analgesia during pregnancy was significantly high among the OASIS group. Rates of episiotomy were not significantly different between the groups. Using a multimodal logistic regression model, after controlling for vacuum delivery, large for gestational age, nulliparity, gestational age, ethnicity, maternal age, induction of labor, fertility treatments, non-reassuring fetal heart rate and non-progressive second stage of labor, epidural analgesia was found to be significantly associated with OASIS. CONCLUSION Epidural analgesia was found to be an independent risk factor for OASIS in our population.
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Affiliation(s)
- Tamar Eshkoli
- Department of Obstetrics and Gynecology, Soroka University Medical Center, Faculty of Health Sciences, Ben-Gurion University of the Negev, Reger Street, P.O.B 151, 84101, Beersheba, Israel.
| | - Yael Baumfeld
- Department of Obstetrics and Gynecology, Soroka University Medical Center, Faculty of Health Sciences, Ben-Gurion University of the Negev, Reger Street, P.O.B 151, 84101, Beersheba, Israel
| | - Zehava Yohay
- Department of Anesthesiology, Soroka University Medical Center, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beersheba, Israel
| | - Yair Binyamin
- Department of Anesthesiology, Soroka University Medical Center, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beersheba, Israel
| | - Efrat Speigel
- Department of Obstetrics and Gynecology, Soroka University Medical Center, Faculty of Health Sciences, Ben-Gurion University of the Negev, Reger Street, P.O.B 151, 84101, Beersheba, Israel
| | - Lianne Dym
- Department of Obstetrics and Gynecology, Soroka University Medical Center, Faculty of Health Sciences, Ben-Gurion University of the Negev, Reger Street, P.O.B 151, 84101, Beersheba, Israel
| | - Adi Y Weintraub
- Department of Obstetrics and Gynecology, Soroka University Medical Center, Faculty of Health Sciences, Ben-Gurion University of the Negev, Reger Street, P.O.B 151, 84101, Beersheba, Israel
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Chill HH, Dick A, Zarka W, Vilk Ayalon N, Rosenbloom JI, Shveiky D, Karavani G. Factors Associated with Obstetric Anal Sphincter Injury During Vacuum-Assisted Vaginal Delivery. Int Urogynecol J 2024:10.1007/s00192-024-05785-5. [PMID: 38703223 DOI: 10.1007/s00192-024-05785-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Accepted: 03/25/2024] [Indexed: 05/06/2024]
Abstract
INTRODUCTION AND HYPOTHESIS Obstetric anal sphincter injury (OASI) is a major complication associated with vacuum-assisted vaginal delivery (VAVD). The aim of this study was to evaluate risk factors related to vacuum extraction that are associated with OASI. METHODS This was a case-control study performed at a tertiary university teaching hospital. Included were patients aged 18-45 years who had a singleton pregnancy resulting in a live, term, VAVD. The study group consisted of women diagnosed with OASI following vacuum extraction. The control group included women following VAVD without OASI. Matching at a ratio of 1:2 was performed. Groups were compared regarding demographic, obstetric. and labor-related parameters, specifically focusing on variables related to the vacuum procedure itself. RESULTS One hundred and ten patients within the study group and 212 within the control group were included in the final analysis. Patients in the OASI group were more likely to undergo induction of labor, use of oxytocin during labor, increased second stage of labor, higher likelihood of the operator being a resident, increased number of pulls, procedure lasting under 10 min, occipito-posterior head position at vacuum initiation, episiotomy, increased neonatal head circumference, and birthweight. Multivariate logistic regression analysis revealed that increased week of gestation (OR 1.67, 95% CI 1.25-2.22, p < 0.001), unsupervised resident performing the procedure (OR 4.63, 95% CI 2.17-9.90), p < 0.001), indication of VAVD being fetal distress (OR 2.72, 95% CI 1.04-7.10, p = 0.041), and length of procedure under 10 min (OR 4.75, 95% CI 1.53-14.68, p = 0.007) were associated with OASI. Increased maternal age was associated with lower risk of OASI (OR 0.9, 95% CI 0.84-0.98, p = 0.012). CONCLUSIONS When performing VAVD, increased week of gestation, unsupervised resident performing the procedure, fetal distress as vacuum indication, and vacuum procedure under 10 min were associated with OASI. In contrast, increased maternal age was shown to be a protective factor.
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Affiliation(s)
- Henry H Chill
- Female Pelvic Medicine and Reconstructive Surgery (FPMRS), Division of Urogynecology, University of Chicago, Northshore University Health System, 9650 Gross Point Road, Suite 3900, Skokie, IL, USA.
- Division of Female Pelvic Medicine and Reconstructive Surgery, Department of Obstetrics and Gynecology, Hadassah Medical Center, Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem, Israel.
| | - Aharon Dick
- Department of Obstetrics and Gynecology, Hadassah Medical Center, Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem, Israel
| | - Wajdy Zarka
- Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem, Israel
| | - Naama Vilk Ayalon
- Department of Obstetrics and Gynecology, Hadassah Medical Center, Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem, Israel
| | - Joshua I Rosenbloom
- Department of Obstetrics and Gynecology, Hadassah Medical Center, Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem, Israel
| | - David Shveiky
- Division of Female Pelvic Medicine and Reconstructive Surgery, Department of Obstetrics and Gynecology, Hadassah Medical Center, Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem, Israel
- Department of Obstetrics and Gynecology, Hadassah Medical Center, Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem, Israel
| | - Gilad Karavani
- Department of Obstetrics and Gynecology, Hadassah Medical Center, Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem, Israel
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Levin G, Schwartz A, Horesh N, Alcalay M, Ram E, Meyer R. Predelivery sonographic predictors of obstetric anal sphincter injury among nulliparous women. Int J Gynaecol Obstet 2024; 165:801-805. [PMID: 38009463 DOI: 10.1002/ijgo.15257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Revised: 11/03/2023] [Accepted: 11/06/2023] [Indexed: 11/28/2023]
Abstract
OBJECTIVE Data available at admission to delivery of nulliparous has rarely been investigated for prediction of obstetric anal sphincter injury (OASI). The aim of the present study was to study risk factors for OASI in nulliparous based on information available at admission. METHODS A retrospective study of all nulliparous women undergoing labor, during March 2011 to January 2021 was performed. We compared women with OASI following delivery to those without by univariate and multivariable regression. RESULTS A total of 30 262 deliveries were included and 4181 (13.4%) of those were delivered by an emergent cesarean delivery. OASI followed 453 (1.5%) deliveries. Women in the OASI group were younger 29 ± 4.4 versus 30 ± 4.8, P = 0.001. In a multivariable regression analysis, higher sonographic estimated fetal weight was positively associated with OASI occurrence (aOR, 95% CI: 1.13 [1.00-1.29]). Maternal age was inversely associated with OASI occurrence (adjusted odds ratio [aOR], 95% confidence interval [CI] 0.95 [0.92-0.97]). CONCLUSION Sonographic fetal weight estimation is an independent risk factor for OASI occurrence that may be available at admission for delivery among nulliparous women.
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Affiliation(s)
- Gabriel Levin
- The Department of Gynecologic Oncology, Hadassah Medical Center, Jerusalem, Israel
- Faculty of Medicine, Hebrew University, Jerusalem, Israel
| | - Anat Schwartz
- The Department of Obstetrics and Gynecology, The Chaim Sheba Medical Center, Ramat-Gan, Israel
- Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Nir Horesh
- Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
- The Department of Surgery and Transplantation, The Chaim Sheba Medical Center, Ramat-Gan, Israel
| | - Menachem Alcalay
- The Department of Obstetrics and Gynecology, The Chaim Sheba Medical Center, Ramat-Gan, Israel
- Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Edward Ram
- Department of Surgery B, Sheba Medical Centre, Tel Hashomer, Israel
- Tel-Aviv University, Tel-Aviv, Israel
| | - Raanan Meyer
- The Department of Obstetrics and Gynecology, The Chaim Sheba Medical Center, Ramat-Gan, Israel
- Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
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Baruch Y, Gold R, Eisenberg H, Amir H, Yogev Y, Groutz A. Substantial Obstetric Anal Sphincter Injury during Vacuum Assisted Delivery: An Obstetrical Issue or Device Related? J Clin Med 2022; 11:jcm11236990. [PMID: 36498565 PMCID: PMC9736983 DOI: 10.3390/jcm11236990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 11/17/2022] [Accepted: 11/25/2022] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND Obstetric anal sphincter injuries (OASIS) might be associated with long-term urinary and anorectal morbidities. The aim of the study was to investigate the risk factors and clinical implications of OASIS associated with vacuum-assisted deliveries versus normal vaginal deliveries. METHODS A series of 413 consecutive OASIS cases were retrospectively analyzed. A comparison was made between OASIS cases diagnosed following vacuum-assisted deliveries versus OASIS cases diagnosed following normal vaginal deliveries. Multivariable analysis was used to study the association between vacuum-assisted deliveries and superficial (3A and 3B) versus deep (3C and 4) perineal tears. RESULTS The study population comprised 88,123 singleton vaginal deliveries. Diagnosis of OASIS was made in 413 women (0.47% of the total cohort), 379 (91.8%) of whom had third-degree tears and 34 (8.2%) of whom had fourth-degree tears. Among the 7410 vacuum-assisted deliveries, 102 (1.37%) had OASIS, whereas, among the 80,713 normal vaginal deliveries, only 311 (0.39%) had OASIS. In a multivariate analysis, only vacuum-assisted delivery was found to be associated with a significant risk of deeper (3C or 4) perineal tears (OR = 1.72; 95% CI 1.02-2.91; p = 0.043). CONCLUSIONS Vacuum-assisted instrumental intervention is a significant risk factor for OASIS and especially for deeper tears, independent of other maternal and obstetric risk factors.
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Affiliation(s)
- Yoav Baruch
- Urogynecology and Pelvic Floor Unit, Department of Obstetrics and Gynecology, Tel Aviv Medical Center, Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
- Correspondence: ; Tel.: +972-36925603
| | - Ronen Gold
- Urogynecology and Pelvic Floor Unit, Department of Obstetrics and Gynecology, Tel Aviv Medical Center, Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Hagit Eisenberg
- Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Hadar Amir
- Lis Maternity Hospital, Tel Aviv Medical Center, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Yariv Yogev
- Lis Maternity Hospital, Tel Aviv Medical Center, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Asnat Groutz
- Urogynecology and Pelvic Floor Unit, Department of Obstetrics and Gynecology, Tel Aviv Medical Center, Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
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Cohen G, Schreiber H, Shalev Ram H, Ovadia M, Shechter-Maor G, Biron-Shental T. Can We Predict Feto-Maternal Adverse Outcomes of Vacuum Extraction? Geburtshilfe Frauenheilkd 2022; 82:1274-1282. [PMID: 36339635 PMCID: PMC9633228 DOI: 10.1055/a-1904-6025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Accepted: 07/16/2022] [Indexed: 11/07/2022] Open
Abstract
Introduction Vacuum extraction (VE) is an important modality in modern obstetrics, yet sometimes results in maternal or neonatal adverse outcomes, which can cause a lifetime disability. We aimed to characterize potential risk factors for adverse outcomes that in retrospect would have led the physician to avoid the procedure. Materials and Methods Retrospective cohort of 3331 singleton pregnancies, ≥ 34 w delivered by VE. 263 deliveries (7.9%) incurred a VE-related feto-maternal adverse outcome, defined as one or more of the following: 3-4th-degree perineal laceration, subgaleal hematoma, intracranial hemorrhage, shoulder dystocia, clavicular fracture, Erb's palsy or fracture of humerus. 3068 deliveries (92.1%) did not have VE-related adverse outcomes. Both groups were compared to determine potential risk factors for VE adverse outcomes. Results Multivariable regression found seven independent risk factors for VE-related feto-maternal adverse outcomes: Nulliparity - with an odds ratio (OR) of 1.82 (95% CI = 1.11-2.98, p = 0.018), epidural anesthesia (OR 1.99, CI = 1.42-2.80, p < 0.001), Ventouse-Mityvac (VM) cup (OR 1.86, CI = 1.35-2.54, p < 0.001), prolonged second stage as indication for VE (OR 1.54, CI = 1.11-2.15, p = 0.010), cup detachment (OR 1.66, CI = 1.18-2.34, p = 0.004), increasing procedure duration (OR 1.07 for every additional minute, CI = 1.03-1.11, p < 0.001) and increasing neonatal birthweight (OR 3.42 for every additional kg, CI = 2.33-5.02, p < 0.001). Occiput anterior (OA) position was a protective factor (OR 0.62, CI = 0.43-0.89, p = 0.010). Conclusions VE-related adverse outcomes can be correlated to clinical characteristics, such as nulliparity, epidural anesthesia, VM cup, prolonged second stage as indication for VE, cup detachment, prolonged procedure duration and increasing neonatal weight. OA position was a protective factor. This information may assist medical staff to make an informed decision whether to choose VE or cesarean delivery (CD).
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Affiliation(s)
- Gal Cohen
- 37253Department of Obstetrics and Gynecology, Meir Medical Center, Kfar Saba, Israel,58408Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel,Korrespondenzadresse Gal Cohen 37253Meir Medical Center, Department of Obstetrics and GynecologyTchernichovsky
St. 5944281 Kfar SabaIsrael
| | - Hanoch Schreiber
- 37253Department of Obstetrics and Gynecology, Meir Medical Center, Kfar Saba, Israel,58408Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Hila Shalev Ram
- 37253Department of Obstetrics and Gynecology, Meir Medical Center, Kfar Saba, Israel,58408Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Michal Ovadia
- 37253Department of Obstetrics and Gynecology, Meir Medical Center, Kfar Saba, Israel,58408Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Gil Shechter-Maor
- 37253Department of Obstetrics and Gynecology, Meir Medical Center, Kfar Saba, Israel,58408Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Tal Biron-Shental
- 37253Department of Obstetrics and Gynecology, Meir Medical Center, Kfar Saba, Israel,58408Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
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Schreiber H, Cohen G, Farladansky-Gershnabel S, Sharon-Weiner M, Shechter Maor G, Biron-Shental T, Markovitch O. Vacuum-Assisted Delivery Complication Rates Based on Ultrasound-Estimated Fetal Weight. J Clin Med 2022; 11:jcm11123480. [PMID: 35743550 PMCID: PMC9225495 DOI: 10.3390/jcm11123480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Revised: 06/03/2022] [Accepted: 06/15/2022] [Indexed: 02/04/2023] Open
Abstract
This retrospective cohort study investigated the association between ultrasonographic estimated fetal weight (EFW) and adverse maternal and neonatal outcomes after vacuum-assisted delivery (VAD). It included women with singleton pregnancies at 34−41 weeks gestation, who underwent ultrasonographic pre-labor EFW and VAD in an academic institution, over 6 years. Adverse neonatal and maternal outcomes included shoulder dystocia, clavicular fracture, or third- and fourth-degree perineal tears. A receiver−operator characteristic curve was used to identify the optimal weight cut-off value to predict adverse outcomes. Fetuses above and below this point were compared. Multivariate analysis was used to control for factors that could lead to adverse outcomes. Eight-hundred and fifty women met the inclusion criteria and had sonographic EFW within two-weeks before delivery. Receiver−operator characteristic curve analysis found that ultrasonographic EFW 3666 g is the optimal threshold for adverse outcomes. Based on these results, outcomes were compared using EFW 3700 g. The average EFW in the ≥3700 g group (n = 220, 25.9%) was 3898 ± 154 g (average birthweight 3710 ± 324 g). In the group <3700 g (n = 630, 74.1%), average EFW was 3064 ± 411 g (birthweight 3120 ± 464 g). Shoulder dystocia and clavicular fractures were more frequent in the higher EFW group (6.4% and 2.3% vs. 1.6% and 0.5%, respectively; p < 0.05). Women in the ≥3700 g group experienced more third- and fourth-degree perineal tears (3.2% vs. 1%, p = 0.02). Multivariate logistic regression analysis found maternal age, diabetes and sonographic EFW ≥ 3700 g as independent risk-factors for adverse outcomes. Sonographic EFW ≥ 3700 g is an independent risk-factor for adverse outcomes in VAD. This should be considered when choosing the optimal mode of delivery.
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Affiliation(s)
- Hanoch Schreiber
- Department of Obstetrics and Gynecology, Meir Medical Center, Kfar Saba 4428164, Israel; (G.C.); (S.F.-G.); (M.S.-W.); (G.S.M.); (T.B.-S.); (O.M.)
- Sackler School of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
- Correspondence: ; Tel.: +972-9-7472561 or +972-53-3323248
| | - Gal Cohen
- Department of Obstetrics and Gynecology, Meir Medical Center, Kfar Saba 4428164, Israel; (G.C.); (S.F.-G.); (M.S.-W.); (G.S.M.); (T.B.-S.); (O.M.)
- Sackler School of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Sivan Farladansky-Gershnabel
- Department of Obstetrics and Gynecology, Meir Medical Center, Kfar Saba 4428164, Israel; (G.C.); (S.F.-G.); (M.S.-W.); (G.S.M.); (T.B.-S.); (O.M.)
- Sackler School of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Maya Sharon-Weiner
- Department of Obstetrics and Gynecology, Meir Medical Center, Kfar Saba 4428164, Israel; (G.C.); (S.F.-G.); (M.S.-W.); (G.S.M.); (T.B.-S.); (O.M.)
- Sackler School of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Gil Shechter Maor
- Department of Obstetrics and Gynecology, Meir Medical Center, Kfar Saba 4428164, Israel; (G.C.); (S.F.-G.); (M.S.-W.); (G.S.M.); (T.B.-S.); (O.M.)
- Sackler School of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Tal Biron-Shental
- Department of Obstetrics and Gynecology, Meir Medical Center, Kfar Saba 4428164, Israel; (G.C.); (S.F.-G.); (M.S.-W.); (G.S.M.); (T.B.-S.); (O.M.)
- Sackler School of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Ofer Markovitch
- Department of Obstetrics and Gynecology, Meir Medical Center, Kfar Saba 4428164, Israel; (G.C.); (S.F.-G.); (M.S.-W.); (G.S.M.); (T.B.-S.); (O.M.)
- Sackler School of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
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Meyer R, Schwartz A, Horesh N, Alcalay M, Ram E, Levin G. A dynamic prediction score for obstetric anal sphincter injury among nulliparous women delivering vaginally. Int J Gynaecol Obstet 2021; 157:271-276. [PMID: 33930180 DOI: 10.1002/ijgo.13730] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 04/19/2021] [Accepted: 04/28/2021] [Indexed: 11/09/2022]
Abstract
OBJECTIVE To develop a risk score for obstetric anal sphincter injury (OASI) occurrence among nulliparous women delivering vaginally, based on data available at admission for delivery and as labor progresses. METHODS A retrospective study of all nulliparous women who delivered vaginally between March 2011 and January 2021. Characteristics were compared between OASI and no-OASI groups. Multivariable analyses were performed to identify independent risk factors for OASI occurrence. RESULTS OASI occurred in 453 (1.7%) of 26 081 women who met the inclusion criteria. The following variables were independently associated with OASI: maternal height (adjusted odds ratio [aOR] 0.97, 95% confidence interval (CI) 0.95-0.99), hypertensive disorders (aOR 1.74, 95% CI 1.03-2.95), sonographic fetal weight estimation (aOR 1.00, 95% CI 1.00-1.00), second-stage duration (aOR 1.00, 95% CI 1.00-1.00), occiput posterior position (aOR 2.87, 95% CI 1.79-4.62), and episiotomy performance (aOR 0.63, 95% CI 0.47-0.84). In a risk score based on variables available at admission for delivery, the presence of two factors was associated with 4.3% OASI risk. Upon incorporating intrapartum variables, the presence of two risk factors was associated with 2.9% OASI rate. CONCLUSION A dynamic risk score for OASI occurrence based on data available at admission for delivery and as delivery progresses can assist in counseling regarding OASI risk. A dynamic risk score for obstetric anal sphincter injury occurrence based on data available at admission for delivery and intrapartum was developed.
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Affiliation(s)
- Raanan Meyer
- The Department of Obstetrics and Gynecology, the Chaim Sheba Medical Center, Ramat-Gan, Israel.,Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Anat Schwartz
- The Department of Obstetrics and Gynecology, the Chaim Sheba Medical Center, Ramat-Gan, Israel.,Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Nir Horesh
- Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel.,The Department of Surgery and Transplantation, the Chaim Sheba Medical Center, Ramat-Gan, Israel
| | - Menachem Alcalay
- The Department of Obstetrics and Gynecology, the Chaim Sheba Medical Center, Ramat-Gan, Israel.,Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel.,Urogynecology Unit, The Department of Obstetrics and Gynecology, Baruch Padeh-Poria Medical Center, Tiberias, Israel.,The Faculty of Medicine at Galille, Bar-Ilan University, Ramat Gan, Israel
| | - Edward Ram
- Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel.,The Department of Surgery and Transplantation, the Chaim Sheba Medical Center, Ramat-Gan, Israel
| | - Gabriel Levin
- The Department of Obstetrics and Gynecology, Hadassah Medical Center, Jerusalem, Israel.,Faculty of Medicine, Hebrew University, Jerusalem, Israel
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Schreiber H, Mevorach N, Sharon-Weiner M, Farladansky-Gershnabel S, Shechter Maor G, Biron-Shental T. The role of mediolateral episiotomy during vacuum-assisted vaginal delivery with soft cup devices. Arch Gynecol Obstet 2020; 303:885-890. [PMID: 33108516 DOI: 10.1007/s00404-020-05809-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Accepted: 09/18/2020] [Indexed: 12/01/2022]
Abstract
PURPOSE This study evaluated whether episiotomy during vacuum-assisted delivery leads to fewer third- and fourth-degree tears. METHODS This was a retrospective cohort study of all nulliparas who underwent a singleton, soft cup, vacuum-assisted vaginal delivery in one institution, from January 2014 to August 2019. Failed vacuum deliveries were excluded. Based on power analysis calculation, a sample size of 500 women in each group was sufficient to detect an advantage of episiotomy, if present. Primary outcome was third- or fourth-degree perineal tear. Secondary outcomes were other maternal complications, and low neonatal cord pH and Apgar scores. Outcomes were compared between women with and without episiotomy. RESULTS During the study period, 2370 nulliparas had a vacuum-assisted vaginal delivery using soft vacuum cup and met the study inclusion criteria. Episiotomy was performed in 1868 (79%) women, and 502 (21%) delivered without episiotomy. Background characteristics were similar in both groups. There were no significant differences in the rates of third and fourth grade perineal lacerations between the two groups. Episiotomy was associated with higher rate of postpartum hemorrhage (p < 0.01) CONCLUSIONS: Using selective episiotomy for patients delivering vaginally with the assistance of soft cap vacuum does not increase third- or fourth-degree perineal tears.
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Affiliation(s)
- Hanoch Schreiber
- Department of Obstetrics and Gynecology, Meir Medical Center, 59 Tchernichovsky St., 44281, Kfar Saba, Israel.
- Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel.
| | - Nir Mevorach
- Department of Obstetrics and Gynecology, Meir Medical Center, 59 Tchernichovsky St., 44281, Kfar Saba, Israel
- Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Maya Sharon-Weiner
- Department of Obstetrics and Gynecology, Meir Medical Center, 59 Tchernichovsky St., 44281, Kfar Saba, Israel
- Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Sivan Farladansky-Gershnabel
- Department of Obstetrics and Gynecology, Meir Medical Center, 59 Tchernichovsky St., 44281, Kfar Saba, Israel
- Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Gil Shechter Maor
- Department of Obstetrics and Gynecology, Meir Medical Center, 59 Tchernichovsky St., 44281, Kfar Saba, Israel
- Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Tal Biron-Shental
- Department of Obstetrics and Gynecology, Meir Medical Center, 59 Tchernichovsky St., 44281, Kfar Saba, Israel
- Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
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Ekstein-Badichi N, Shoham-Vardi I, Weintraub AY. Temporal trends in the incidence of and associations between the risk factors for obstetrical anal sphincter injuries. Am J Obstet Gynecol MFM 2020; 3:100247. [PMID: 33451614 DOI: 10.1016/j.ajogmf.2020.100247] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Accepted: 09/26/2020] [Indexed: 12/18/2022]
Abstract
BACKGROUND Obstetrical anal sphincter injuries are an important complication of vaginal deliveries that may result in short- and long-term pelvic floor morbidity and a diminished quality of life in young, healthy women. The prevalence of obstetrical anal sphincter injuries ranges from 0.1% to 8.7%. Over recent years, there seems to be a trend of increasing occurrence of obstetrical anal sphincter injuries worldwide. It is unclear why the rates are rising. Previous studies have examined the effect of different risk factors on the prevalence of obstetrical anal sphincter injuries. The change in the incidence of some risk factors for obstetrical anal sphincter injuries can partially explain the overall increase in obstetrical anal sphincter injuries. There is no previous study that explored the impact of the changes of individual risk factors over time on the risk for obstetrical anal sphincter injuries. OBJECTIVE The main aim of this study was to examine the temporal trends in the prevalence and odds ratio of the major risk factors known to be associated with obstetrical anal sphincter injuries in the period from 1988 to 2016. STUDY DESIGN This was a retrospective cohort study that included all women who underwent vaginal deliveries between 1988 and 2016 at a tertiary university medical center. The time intervals were divided into 4 periods (1988-1997, 1998-2007, 2008-2016, and the total time from 1988 to 2016) and the incidence of each risk factor was calculated for each time period. Correlation models and regression analysis were performed to examine the association between obstetrical anal sphincter injuries and the different risk factors over time. Furthermore, the trends in the odds ratios of the important risk factors over the time periods were evaluated using a multivariate regression analysis in which the primiparous women were separated from the multiparous women. RESULTS During the study period, there were 295,668 vaginal deliveries. Of these, 591 women were diagnosed with obstetrical anal sphincter injuries (0.2%). The significant risk factors for obstetrical anal sphincter injuries (P<.05) in the multivariable analysis were the following: primiparity, vaginal birth after cesarean delivery, vacuum extraction, and a birthweight of >4 kg. There was a significant (P<.05) increase in the incidence over the study period for the following risk factors: primiparity, vaginal birth after cesarean delivery, and vacuum extraction. No change was found in the incidence of the risk factor of a birthweight of >4 kg. In addition, we found a strengthening of the association between vaginal birth after cesarean delivery and macrosomia with obstetrical anal sphincter injuries, as opposed to a decline in the relative contribution of vacuum extraction to the overall risk for obstetrical anal sphincter injuries. Moreover, we found that obstetrical anal sphincter injuries among primiparous women increased 7-fold over the study period but was unchanged among multiparous women. CONCLUSION We have shown significant (P<.05) temporal trends in the incidence and odds ratio of some of the known risk factors for obstetrical anal sphincter injuries. A better understanding of the changes in the incidence and specific contribution of important risk factors for obstetrical anal sphincter injuries may explain, in part, the worldwide increase in the prevalence of this important and detrimental complication of vaginal birth.
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Affiliation(s)
- Naava Ekstein-Badichi
- Department of Public Health, Faculty of Health Sciences, Soroka University Medical Center, Ben Gurion University of the Negev, Be'er Sheva, Israel.
| | - Ilana Shoham-Vardi
- Department of Public Health, Faculty of Health Sciences, Soroka University Medical Center, Ben Gurion University of the Negev, Be'er Sheva, Israel
| | - Adi Y Weintraub
- Department of Public Health, Faculty of Health Sciences, Soroka University Medical Center, Ben Gurion University of the Negev, Be'er Sheva, Israel; Department of Obstetrics and Gynecology, Soroka University Medical Center, Ben Gurion University of the Negev, Be'er Sheva, Israel
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Levin G, Friedman T, Shai D, Alcalay M, Ram E, Meyer R. The association between vacuum-assisted vaginal delivery and anal sphincter injury. Int Urogynecol J 2020; 32:1771-1777. [PMID: 32997160 DOI: 10.1007/s00192-020-04534-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Accepted: 09/08/2020] [Indexed: 11/25/2022]
Abstract
INTRODUCTION Vacuum-assisted vaginal delivery (VAVD) is considered a major risk factor for obstetric anal sphincter injuries (OASIS). However, it is difficult to estimate its true contribution to the occurrence of OASIS, as its performance may be confounded by other determinants. Therefore, we aimed to evaluate the association of VAVD with OASIS among primiparous women compared to SVD. METHODS A retrospective cohort study including all primiparous women who vaginally delivered a cephalic singleton gestation during the years 2011 to 2020. As VAVDs were not performed before 34 gestational weeks, we capped the cohort at this gestational age. Women were allocated into two groups: VAVDs and spontaneous vaginal deliveries (SVD). We compared women with OASIS to those without and performed a multivariate analysis including factors that were found significant in the univariate analysis. We further divided the whole cohort into different subcategories. The primary outcome was the rate of OASIS in VAVD compared to SVD. RESULTS Overall, 23,272 primiparous vaginal deliveries were available for evaluation. Of these, 3595 delivered by VAVD and 19,677 delivered spontaneously. OASIS occurred in 421 (1.8%) of the deliveries. OASIS were more common in VAVDs than in SVDs [83 (2.3%) vs. 338 (1.7%), respectively, OR (95% CI) 1.35 (1.06-1.72), p = 0.01]. After multivariate regression analysis, OASIS were not found to be independently associated with the mode of delivery [aOR 1.21 (95% CI) 0.88-1.68, P = 0.23]. In a categorical analysis of OASIS rates by risk factors and mode of delivery, VAVD was not associated with an increase in OASIS among women giving birth to neonates weighing > 3500 g compared to SVD [OR (95% CI) 1.02 (0.65-1.62), P = 0.90]. CONCLUSION Among primiparous women VAVD did not increase the risk of OASIS compared to SVD.
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Affiliation(s)
- Gabriel Levin
- The Department of Obstetrics and Gynecology, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - Talia Friedman
- The Department of Obstetrics and Gynecology, the Chaim Sheba Medical Center, Ramat-Gan, Israel, affiliated to Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Daniel Shai
- The Department of Obstetrics and Gynecology, the Chaim Sheba Medical Center, Ramat-Gan, Israel, affiliated to Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Menachem Alcalay
- The Department of Obstetrics and Gynecology, the Chaim Sheba Medical Center, Ramat-Gan, Israel, affiliated to Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
- The Department of Obstetrics and Gynecology, Urogynecology Unit, Baruch Padeh-Poria Medical Center, Tiberias, Israel, affiliated to The Faculty of Medicine at Galille, Bar Ilan University, Ramat Gan, Israel
| | - Edward Ram
- The Department of Surgery and Transplantation, the Chaim Sheba Medical Center, Ramat-Gan, Israel affiliated to Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Raanan Meyer
- The Department of Obstetrics and Gynecology, the Chaim Sheba Medical Center, Ramat-Gan, Israel, affiliated to Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel.
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