NCT05035485

Maternal Cardiac Output Response to Rescue Norepinephrine and Phenylephrine Boluses in Patients With Severe Preeclampsia

Maternal Cardiac Output Response to Rescue Norepinephrine and Phenylephrine Boluses During Spinal Anesthesia for Caesarean Section in Patients With Severe Preeclampsia: a Randomized, Controlled Trial

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 40 (actual)
• Sponsor: General Hospital of Ningxia Medical University · Academic / Other
• Sex: Female
• Age: 18 Years – 45 Years
• Healthy volunteers: Not accepted

Summary

The purpose of this study is to investigate the maternal cardiac output response to rescue norepinephrine and phenylephrine boluses for postspinal anesthesia hypotension in parturients with preeclampsia undergoing cesarean section.

Detailed description

Preeclampsia, which affects 5% to 7% of parturients, is a significant cause of maternal and neonatal morbidity and mortality. Because of constricted myometrial spiral arteries with exaggerated vasomotor responsiveness, though blood pressure in parturients with preeclampsia are apparently higher than healthy parturients, placental hypoperfusion is more common. Spinal anesthesia is still the preferred mode of anesthesia in parturients with preeclampsia for cesarean section. In preeclampsia parturients, spinal anesthesia improve intervillous blood flow (provided that hypotension is avoided) which contribute to increase placental perfusion. Even so, 17-26% parturients with preeclampsia experienced postspinal anesthesia hypotension due to the extensive sympathetic block that occurred with spinal anesthesia. As a potential substitute drug for phenylephrine and ephedrine, norepinephrine has gained traction for use in parturients undergoing cesarean section. However, hemodynamic effects of the rescue norepinephrine bolus is still unknown. The purpose of this study is to investigate the maternal cardiac output response to rescue norepinephrine and phenylephrine boluses for postspinal anesthesia hypotension in parturients with preeclampsia undergoing cesarean section.

Conditions

• Hemodynamic Instability

Interventions

Type	Name	Description
DRUG	Phenylephrine	A rescue phenylephrine (75μg) was given when postspinal anesthesia hypotension occurred within 30 minutes after spinal anesthesia
DRUG	Norepinephrine	A rescue norepinephrine (6μg) was given when postspinal anesthesia hypotension occurred within 30 minutes after spinal anesthesia

Timeline

• Start date: 2022-09-13
• Primary completion: 2024-01-21
• Completion: 2024-01-21
• First posted: 2021-09-05
• Last updated: 2024-02-02

Locations

1 site across 1 country: China