Maria Goya1, Maria de la Calle2, Laia Pratcorona3, Carme Merced3, Carlota Rodó3, Begoña Muñoz4, Miquel Juan5, Ariana Serrano6, Elisa Llurba3, Teresa Higueras3, Elena Carreras3, Luis Cabero3. 1. Maternal Fetal Medicine Units, Department of Obstetrics at Hospital Universitari Vall d'Hebron, Universitat Autonoma de Barcelona, Barcelona. Electronic address: mgoya@vhebron.net. 2. Hospital Materno Infantil La Paz, Madrid. 3. Maternal Fetal Medicine Units, Department of Obstetrics at Hospital Universitari Vall d'Hebron, Universitat Autonoma de Barcelona, Barcelona. 4. Hospital Sant Joan de Reus, Reus, Tarragona. 5. Hospital Son Llatzer, Balearic Islands. 6. Institut Sanitari Dexeus. Barcelona.
Abstract
BACKGROUND:Spontaneous preterm birth (SPB) is the leading cause of perinatal morbidity and mortality. In twins, the rate of preterm birth is higher than in singletons; interventions to prevent preterm birth are needed in this high-risk population. OBJECTIVE: We sought to test whether a cervical pessary reduces the preterm birth rate in twin pregnancies with sonographic short cervix. STUDY DESIGN: A prospective, open-label, multicenter, randomized clinical trial was conducted in 5 hospitals in Spain. The ethics committees of all participating hospitals approved the protocol. The trial was registered as ClinicalTrials.gov, number NCT01242410. Eligible women were scanned in Spain. The primary outcome was SPB <34 weeks of gestation. Neonatal morbidity and mortality were also evaluated. RESULTS:Cervical length was measured in 2287 women; 137 pregnant women with a sonographic cervical length ≤25 mm (of 154 detected with a short cervix) were randomly assigned to receive a cervical pessary or expectant management (1:1 ratio). SPB <34 weeks of gestation was significantly less frequent in the pessary group than in the expectant management group (11/68 [16.2%] vs 26/66 [39.4%]; relative risk, 0.41; 95% confidence interval, 0.22-0.76). Pessary use was associated with a significant reduction in the rate of birthweight <2500 g (P = .01). No significant differences were observed in composite neonatal morbidity outcome (8/136 [5.9%] vs 12/130 [9.1%]; relative risk, 0.64; 95% confidence interval, 0.27-1.50) or neonatal mortality (none) between the groups. No serious adverse effects associated with the use of a cervical pessary were observed. CONCLUSION: The insertion of a cervical pessary was associated with a significant reduction in the SPB rate. We propose the use of a cervical pessary for preventing preterm birth in twin pregnancies of mothers with a short cervix.
RCT Entities:
BACKGROUND: Spontaneous preterm birth (SPB) is the leading cause of perinatal morbidity and mortality. In twins, the rate of preterm birth is higher than in singletons; interventions to prevent preterm birth are needed in this high-risk population. OBJECTIVE: We sought to test whether a cervical pessary reduces the preterm birth rate in twin pregnancies with sonographic short cervix. STUDY DESIGN: A prospective, open-label, multicenter, randomized clinical trial was conducted in 5 hospitals in Spain. The ethics committees of all participating hospitals approved the protocol. The trial was registered as ClinicalTrials.gov, number NCT01242410. Eligible women were scanned in Spain. The primary outcome was SPB <34 weeks of gestation. Neonatal morbidity and mortality were also evaluated. RESULTS: Cervical length was measured in 2287 women; 137 pregnant women with a sonographic cervical length ≤25 mm (of 154 detected with a short cervix) were randomly assigned to receive a cervical pessary or expectant management (1:1 ratio). SPB <34 weeks of gestation was significantly less frequent in the pessary group than in the expectant management group (11/68 [16.2%] vs 26/66 [39.4%]; relative risk, 0.41; 95% confidence interval, 0.22-0.76). Pessary use was associated with a significant reduction in the rate of birthweight <2500 g (P = .01). No significant differences were observed in composite neonatal morbidity outcome (8/136 [5.9%] vs 12/130 [9.1%]; relative risk, 0.64; 95% confidence interval, 0.27-1.50) or neonatal mortality (none) between the groups. No serious adverse effects associated with the use of a cervical pessary were observed. CONCLUSION: The insertion of a cervical pessary was associated with a significant reduction in the SPB rate. We propose the use of a cervical pessary for preventing preterm birth in twin pregnancies of mothers with a short cervix.
Authors: Andrea R Westervelt; Michael Fernandez; Michael House; Joy Vink; Chia-Ling Nhan-Chang; Ronald Wapner; Kristin M Myers Journal: J Biomech Eng Date: 2017-05-01 Impact factor: 2.097
Authors: Jane E Norman; John Norrie; Graeme MacLennan; David Cooper; Sonia Whyte; Sushila Chowdhry; Sarah Cunningham-Burley; Aileen R Neilson; Xue W Mei; Joel Be Smith; Andrew Shennan; Stephen C Robson; Steven Thornton; Mark D Kilby; Neil Marlow; Sarah J Stock; Philip R Bennett; Jane Denton Journal: Health Technol Assess Date: 2021-07 Impact factor: 4.014