Giulia M Muraca1, Yasser Sabr2, Sarka Lisonkova3, Amanda Skoll4, Rollin Brant5, Geoffrey W Cundiff4, K S Joseph3. 1. School of Population and Public Health, University of British Columbia, Vancouver, BC; Department of Obstetrics and Gynaecology, University of British Columbia, Vancouver, BC; BC Children's Hospital Research Institute, Vancouver, BC. Electronic address: gmuraca@bcchr.ca. 2. BC Children's Hospital Research Institute, Vancouver, BC; Department of Obstetrics and Gynaecology, King Saud University, King Khalid University Hospital, Riyadh, Saudi Arabia. 3. School of Population and Public Health, University of British Columbia, Vancouver, BC; Department of Obstetrics and Gynaecology, University of British Columbia, Vancouver, BC; BC Children's Hospital Research Institute, Vancouver, BC. 4. Department of Obstetrics and Gynaecology, University of British Columbia, Vancouver, BC; BC Children's Hospital Research Institute, Vancouver, BC. 5. BC Children's Hospital Research Institute, Vancouver, BC; Department of Statistics, University of British Columbia, Vancouver, BC.
Abstract
OBJECTIVE: This study sought to quantify perinatal and maternal morbidity and mortality associated with forceps and vacuum delivery compared with Caesarean delivery in the second stage of labour and to estimate whether these associations differed by pelvic station. METHODS: The investigators conducted a population-based, retrospective cohort study of term singleton deliveries by operative delivery with prolonged second stage of labour in Canada (2003-2013) using national hospitalization data. The primary study outcomes were severe perinatal morbidity and mortality (i.e., seizures, assisted ventilation, severe birth trauma, and perinatal death) and severe maternal morbidity and mortality (i.e., severe postpartum hemorrhage, cardiac complication, and maternal death). Logistic regression was used to estimate adjusted odds ratios (aOR) and 95% confidence intervals (CI) after stratifying by indication (dystocia or fetal distress). The Breslow-Day chi-square test for heterogeneity in ORs was used to test effect modification by pelvic station (outlet, low, or midpelvic). RESULTS: There were 61 106 deliveries included in the study. Among women with dystocia, forceps and vacuum deliveries were associated with higher rates of perinatal morbidity and mortality compared with Caesarean delivery (forceps: aOR 1.56; 95% CI 1.13-2.17; vacuum: aOR 1.44; 95% CI 1.06-1.97). Vacuum delivery was associated with lower rates of maternal morbidity and mortality compared with Caesarean delivery (dystocia: aOR 0.64; 95% CI 0.51-0.81; fetal distress: aOR 0.43; 95% CI 0.32-0.57). Pelvic station did not significantly modify the associations between forceps or vacuum and perinatal or maternal morbidity and mortality. CONCLUSION: Forceps and vacuum delivery is associated with increased rates of severe perinatal morbidity and mortality compared with Caesarean delivery among women with dystocia, whereas vacuum delivery is associated with decreased rates of severe maternal morbidity and mortality.
OBJECTIVE: This study sought to quantify perinatal and maternal morbidity and mortality associated with forceps and vacuum delivery compared with Caesarean delivery in the second stage of labour and to estimate whether these associations differed by pelvic station. METHODS: The investigators conducted a population-based, retrospective cohort study of term singleton deliveries by operative delivery with prolonged second stage of labour in Canada (2003-2013) using national hospitalization data. The primary study outcomes were severe perinatal morbidity and mortality (i.e., seizures, assisted ventilation, severe birth trauma, and perinatal death) and severe maternal morbidity and mortality (i.e., severe postpartum hemorrhage, cardiac complication, and maternal death). Logistic regression was used to estimate adjusted odds ratios (aOR) and 95% confidence intervals (CI) after stratifying by indication (dystocia or fetal distress). The Breslow-Day chi-square test for heterogeneity in ORs was used to test effect modification by pelvic station (outlet, low, or midpelvic). RESULTS: There were 61 106 deliveries included in the study. Among women with dystocia, forceps and vacuum deliveries were associated with higher rates of perinatal morbidity and mortality compared with Caesarean delivery (forceps: aOR 1.56; 95% CI 1.13-2.17; vacuum: aOR 1.44; 95% CI 1.06-1.97). Vacuum delivery was associated with lower rates of maternal morbidity and mortality compared with Caesarean delivery (dystocia: aOR 0.64; 95% CI 0.51-0.81; fetal distress: aOR 0.43; 95% CI 0.32-0.57). Pelvic station did not significantly modify the associations between forceps or vacuum and perinatal or maternal morbidity and mortality. CONCLUSION: Forceps and vacuum delivery is associated with increased rates of severe perinatal morbidity and mortality compared with Caesarean delivery among women with dystocia, whereas vacuum delivery is associated with decreased rates of severe maternal morbidity and mortality.
Authors: Lisa M Korst; Kimberly D Gregory; Lisa A Nicholas; Samia Saeb; David J Reynen; Jennifer L Troyan; Naomi Greene; Moshe Fridman Journal: Matern Health Neonatol Perinatol Date: 2021-01-06
Authors: Giulia M Muraca; Amélie Boutin; Neda Razaz; Sarka Lisonkova; Sid John; Joseph Y Ting; Heather Scott; Michael S Kramer; K S Joseph Journal: CMAJ Date: 2022-01-10 Impact factor: 8.262