ArticleMedical science monitor : international medical journal of experimental and clinical research2019
A Comparative Study of Bolus Norepinephrine, Phenylephrine, and Ephedrine for the Treatment of Maternal Hypotension in Parturients with Preeclampsia During Cesarean Delivery Under Spinal Anesthesia.
Article in Medical science monitor : international medical journal of experimental and clinical research, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT04401345 (Effect of Glycopyrrolate on Vasopressors Requirement for Non-elective Caesarean Section Under Spinal Anaesthesia), which is not on this map. Cited by 25 papers, 2 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Effect of Glycopyrrolate on Vasopressors Requirement for Non-elective Caesarean Section Under Spinal Anaesthesia
Who cites it
25 citing papers in PubMed, 2 syntheses or guidelines pooled it, 57 citations in OpenAlex.
- Norepinephrine vs. phenylephrine for spinal hypotension in cesarean section: a network meta-analysis.Journal of anesthesia · 2025Pooled it
- Comparison of vasopressors for management of hypotension in high-risk caesarean section under neuraxial anesthesia: a systematic review and network meta-analysis.BMC anesthesiology · 2024Pooled it
- Norepinephrine versus colloid for preventing spinal anesthesia-induced hypotension and its impact on intracranial pressure in preeclamptic parturients: a randomized double-blind controlled trial.BMC pregnancy and childbirth · 2026Trial
- Determination of ED90s of Phenylephrine and Norepinephrine Infusion for Strict Blood Pressure Management Targets in Preeclamptic Patients Undergoing Cesarean Section: A Randomized Sequential Allocation Study.Drug design, development and therapy · 2025Trial
- Determination of ED90s of Phenylephrine and Norepinephrine Infusion for Prevention of Spinal Anesthesia-Induced Hypotension in Patients with Preeclampsia During Cesarean Delivery.Drug design, development and therapy · 2024Trial
- Randomized Double-Blinded Comparison of Intermittent Boluses Phenylephrine and Norepinephrine for the Treatment of Postspinal Hypotension in Patients with Severe Pre-Eclampsia During Cesarean Section.Drug design, development and therapy · 2024Trial
- Comparative Dose-Response Study of Phenylephrine Bolus for the Treatment of the First Episode of Spinal Anesthesia-Induced Hypotension for Cesarean Delivery in Severe Preeclamptic versus Normotensive Parturients.Drug design, development and therapy · 2022Trial
- Pharmacologic Strategies for Intraoperative Hypotension When Ephedrine Is Unavailable: An Evidence-Based Review.Journal of personalized medicine · 2026Review
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- Prevention of post-spinal hypotension in high risk cesarean delivery: A systematic review and updated network meta-analysis of prophylactic vasopressor infusions.Indian journal of anaesthesia · 2026Article
- Effect of norepinephrine and phenylephrine on maternal hemodynamic changes after spinal anesthesia in cesarean section: A randomized clinical trial.Caspian journal of internal medicine · 2026Article
- The hemodynamic effects of bolus norepinephrine and phenylephrine in the treatment of hypotensive events in preeclamptic women with severe features following spinal anesthesia during cesarean section: a randomized controlled trial.Frontiers in pharmacology · 2026Article
- Dissecting Vasopressor Efficacy in the Management of Maternal Hypotension in Preeclamptic Cesarean Delivery: A Systematic Review of Randomized Controlled Trials.Maternal-fetal medicine (Wolters Kluwer Health, Inc.) · 2025Article
- Comparison of phenylephrine, ephedrine, and norepinephrine for the prevention and treatment of spinal-induced hypotension in pre-eclamptic patients undergoing caesarean section: A systematic review and network meta-analysis.Indian journal of anaesthesia · 2025Article
- Scoping Review: Is Push-Dose Norepinephrine a Better Choice?The western journal of emergency medicine · 2024Article
- A Comparison of Norepinephrine versus Phenylephrine to Prevent Hypotension after Spinal Anesthesia for Cesarean Section: Systematic Review and Meta-Analysis.Journal of personalized medicine · 2024Review
- Comparison of Prophylactic Infusion of Phenylephrine Versus Norepinephrine for the Prevention of Post Spinal Hypotension in Parturients Undergoing Elective Caesarean Section-a Randomized, Double-Blinded, Non-Inferiority Trial.Turkish journal of anaesthesiology and reanimation · 2023Article
- Ephedrae Herba: A Review of Its Phytochemistry, Pharmacology, Clinical Application, and Alkaloid Toxicity.Molecules (Basel, Switzerland) · 2023Review
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Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
5 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
BACKGROUND This study aimed to compare the efficacy and safety of bolus norepinephrine, phenylephrine, and ephedrine in parturient with preeclampsia who had hypotension during cesarean delivery under spinal anesthesia. MATERIAL AND METHODS One hundred and sixty-six parturient women with preeclampsia who had a baseline systolic blood pressure (SBP) <80% during spinal anesthesia for cesarean section were divided into three treatment groups; bolus norepinephrine 4 μg (group N) (n=56), phenylephrine 50 μg (group P) (n=55), and ephedrine 4 mg (group E) (n=55). Primary outcomes included overall SBP and heart rate (HR) until delivery. Secondary outcomes included the incidence of tachycardia (HR >120 bpm), bradycardia (HR <60 bpm), hypertension (SBP >120% baseline), number of boluses of vasopressor required and episodes of hypotension, maternal side effects, and neonatal outcome. RESULTS Overall HR in group N was significantly increased compared with group P (80.5±12 vs. 76.6±6.9 bpm; P=0.04), and significantly lower compared with group E (80.5±12 vs. 84.9±7.1 bpm; P=0.02). Parturients in group N had fewer episodes of bradycardia compared with group P (3.6% vs. 21.8%; RR=0.26l; 95% CI, 0.07-0.73; P=0.004) and fewer episodes of tachycardia compared with group E (16.1% vs. 36.4%; RR 0.54; 95% CI, 0.29-0.90; P=0.02). CONCLUSIONS A bolus dose of norepinephrine showed similar efficacy to phenylephrine but improved maternal and neonatal safety in parturients with preeclampsia with hypotension during cesarean section under spinal anesthesia.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.