Oxytocin versus carbetocin at elective Cesarean delivery in parturients with class III obesity: a double-blind randomized controlled noninferiority trial

被引:0
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作者
Turner, William [1 ,2 ,7 ]
Boonstra, Linda [1 ,2 ]
Maxwell, Cynthia [2 ,3 ]
Downey, Kristy [1 ,2 ]
Balki, Mrinalini [1 ,2 ,3 ,4 ,5 ,6 ]
机构
[1] Mt Sinai Hosp, Dept Anesthesia & Pain Management, Mt Sinai, Toronto, ON, Canada
[2] Univ Toronto, Dept Anesthesiol & Pain Med, Toronto, ON, Canada
[3] Mt Sinai Hosp, Womens Coll Hosp, Dept Obstet & Gynecol, Mt Sinai, Toronto, ON, Canada
[4] Univ Toronto, Dept Obstet & Gynaecol, Toronto, ON, Canada
[5] Univ Toronto, Dept Physiol, Toronto, ON, Canada
[6] Sinai Hlth, Lunenfeld Tanenbaum Res Inst, Toronto, ON, Canada
[7] Kingston Hosp, Galsworthy Rd, Kingston KT2 7GK, England
关键词
carbetocin; Cesarean delivery; obesity; oxytocin; postpartum hemorrhage; POSTPARTUM HEMORRHAGE; BLOOD-LOSS; PREVENTION;
D O I
10.1007/s12630-024-02891-2
中图分类号
R614 [麻醉学];
学科分类号
100217 ;
摘要
PurposeClass III obesity (body mass index [BMI] >= 40 kg<middle dot>m-2) is associated with high rates of Cesarean deliveries and postpartum hemorrhage, with increased maternal and fetal morbidity. The doses of oxytocin and carbetocin are two to four times higher at Cesarean delivery in patients with class III obesity. We sought to investigate the efficacy of carbetocin 80 mu g iv compared with oxytocin 1 IU iv (plus infusion) at elective Cesarean delivery in parturients with class III obesity. We hypothesized that, with equipotent dosing, carbetocin would be noninferior to oxytocin.MethodsWe conducted a randomized, double-blind, noninferiority study in nonlabouring, term parturients with BMI >= 40 kg<middle dot>m-2 undergoing elective Cesarean delivery under neuraxial anesthesia. Patients received either a 1-IU bolus of oxytocin iv followed by an infusion of 4.8 IU<middle dot>hr-1 or an 80-mu g carbetocin bolus iv followed by a placebo infusion. Uterine tone was determined by palpation by the obstetrician at 3, 5, and 10 min, using a verbal numerical rating score of 0 (boggy) to 10 (firm). The primary outcome was uterine tone at 3 min. Secondary outcomes included uterine tone at 5 and 10 min, blood loss, additional uterotonics, and side effects.ResultsForty-seven participants were included in the analysis. Median tone at 3 min was similar for oxytocin (8; 95% confidence interval [CI], 7 to 8) and carbetocin (8; 95% CI, 8 to 9) (P = 0.06), with no difference at 5 and 10 min. Blood loss, side effects, and the need for additional uterotonics were not significantly different between the study groups.ConclusionWe conclude that carbetocin is noninferior to oxytocin at elective Cesarean delivery in parturients with class III obesity, with the advantage of single bolus dosing without infusion.Study registrationClinicalTrials.gov (NCT04902729); first submitted 21 May 2021. ObjectifL'ob & eacute;sit & eacute; de classe III (indice de masse corporelle [IMC] >= 40 kg<middle dot>m-2) est associ & eacute;e & agrave; des taux & eacute;lev & eacute;s d'accouchements par c & eacute;sarienne et d'h & eacute;morragie du post-partum, ainsi qu'& agrave; une augmentation de la morbidit & eacute; maternelle et f oe tale. Les doses d'ocytocine et de carb & eacute;tocine sont deux & agrave; quatre fois plus & eacute;lev & eacute;es lors de l'accouchement par c & eacute;sarienne chez les persoones atteintes d'ob & eacute;sit & eacute; de classe III. Nous avons cherch & eacute; & agrave; & eacute;tudier l'efficacit & eacute; de la carb & eacute;tocine 80 mu g iv par rapport & agrave; l'ocytocine 1 UI iv (plus perfusion) lors d'un accouchement par c & eacute;sarienne programm & eacute;e chez les personnes parturientes atteintes d'ob & eacute;sit & eacute; de classe III. Nous avons & eacute;mis l'hypoth & egrave;se qu'& agrave; dose & eacute;quivalente la carb & eacute;tocine ne serait pas inf & eacute;rieure & agrave; l'ocytocine.M & eacute;thodeNous avons men & eacute; une & eacute;tude randomis & eacute;e, en double aveugle et de non-inf & eacute;riorit & eacute; chez des personnes parturientes non en travail avec un IMC >= 40 kg<middle dot>m-2 et b & eacute;n & eacute;ficiant d'une c & eacute;sarienne programm & eacute;e sous anesth & eacute;sie neuraxiale. Les patient<middle dot>es ont re & ccedil;u soit un bolus de 1 UI d'ocytocine iv suivi d'une perfusion de 4,8 UI<middle dot>h-1 ou un bolus de carb & eacute;tocine de 80 mu g iv suivi d'une perfusion de placebo. Le tonus ut & eacute;rin a & eacute;t & eacute; d & eacute;termin & eacute; par palpation par l'obst & eacute;tricien<middle dot>ne & agrave; 3, 5 et 10 min, & agrave; l'aide d'un score d'& eacute;valuation num & eacute;rique verbale de 0 (atone) & agrave; 10 (ferme). Le crit & egrave;re d'& eacute;valuation principal & eacute;tait le tonus ut & eacute;rin & agrave; 3 min. Les crit & egrave;res secondaires comprenaient le tonus ut & eacute;rin & agrave; 5 et 10 min, la perte de sang, les ut & eacute;rotoniques suppl & eacute;mentaires et les effets secondaires.R & eacute;sultatsQuarante-sept participant<middle dot>es ont & eacute;t & eacute; inclus<middle dot>es dans l'analyse. Le tonus m & eacute;dian & agrave; 3 min & eacute;tait similaire pour l'ocytocine (8; intervalle de confiance [IC] & agrave; 95 %, 7 & agrave; 8) et la carb & eacute;tocine (8; IC 95 %, 8 & agrave; 9) (P = 0,06), sans diff & eacute;rence & agrave; 5 et 10 min. La perte de sang, les effets secondaires et le besoin d'ut & eacute;rotoniques suppl & eacute;mentaires n'& eacute;taient pas significativement diff & eacute;rents entre les groupes d'& eacute;tude.ConclusionNous concluons que la carb & eacute;tocine n'est pas inf & eacute;rieure & agrave; l'ocytocine lors d'un accouchement par c & eacute;sarienne programm & eacute;e chez les personnes parturientes atteintes d'ob & eacute;sit & eacute; de classe III, avec l'avantage d'une dose unique en bolus sans perfusion.Enregistrement de l'& eacute;tudeClinicalTrials.gov (NCT04902729); premi & egrave;re soumission le 21 mai 2021.
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