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Study identifier: NCT04053478 Synced from ClinicalTrials.gov · July 29, 2026
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Effects of Ephedrine, Phenylephrine, Norepinephrine and Vasopressin on Contractility of Human Myometrium and Umbilical Vessels: An In-vitro Study

Condition: Hypotension  ·  Sponsor: Samuel Lunenfeld Research Institute, Mount Sinai Hospital

PhaseNA
Planned participants144
Who can joinFemale, 19 Years to 40 Years
Healthy volunteersYes

About this study

Hypotension is one of the most common adverse effects of spinal anesthesia for cesarean deliveries, affecting as many as 55-90% of mothers. Hypotension during cesarean deliveries can have detrimental effects on the mother and neonate. Various vasopressors, such as ephedrine, phenylephrine and more recently norepinephrine, have been used for the prevention and treatment of hypotension at cesarean deliveries. Ephedrine was historically considered as the gold standard vasopressor for the management of hypotension during cesarean deliveries. This was based on studies in animal models that showed preserved uteroplacental circulation with ephedrine and not with phenylephrine. However, multiple studies in the past several decades have shown that phenylephrine compared with ephedrine results in a more favorable fetal acid-base status. Consequently, the use of phenylephrine for blood pressure management during cesarean deliveries increased. Recently, norepinephrine was introduced in the obstetrical practice for the management of hypotension at cesarean deliveries, due to its ability to maintain maternal cardiac output better than phenylephrine. Studies have also investigated the use of vasopressin to limit hypotension during CD. There have been case reports of successful vasopressin usage to treat post-spinal hypotension after CD in patients with advanced idiopathic pulmonary arterial hypertension as well as severe mitral stenosis with pulmonary hypertension. Its effect was associat…

This description comes directly from the study's public registry record.

Talk to the study team

Mrinalini Balki, MD  ·  416-586-4800  ·  mrinalini.balki@uhn.ca

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Locations (1)

Mount Sinai HospitalToronto, Ontario, CanadaRecruiting

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Source record: clinicaltrials.gov/study/NCT04053478