Development of a Risk Prediction Model for Post-Spinal Anesthesia Hypotension During Cesarean Delivery Using Heart Rate, Blood Pressure, Perfusion Index, ECG Waveforms, and SpO₂ Waveforms

July 1, 2026 updated by: Peking University Shenzhen Hospital

Spinal anesthesia is the preferred anesthetic technique for patients undergoing cesarean section. Compared with general anesthesia, spinal anesthesia offers multiple advantages. However, a common adverse effect of this technique is hypotension following spinal anesthesia, which is induced by sympathetic blockade and has an incidence rate as high as 70%. Hypotension can lead to maternal nausea and vomiting, reduced fetal Apgar scores, and acidosis, exerting adverse effects on both the mother and the fetus. Furthermore, prolonged duration of hypotension may adversely impact the fetal neurological prognosis. Therefore, predicting which patients are at high risk for developing hypotension facilitates the implementation of preventive measures-such as the administration of vasoactive agents and intensified monitoring through frequent blood pressure measurements-to improve clinical outcomes in these high-risk patients.

Patients undergoing cesarean section who met the inclusion criteria were prospectively observed. A standardized anesthesia protocol was uniformly applied to investigate the incidence of hypotension following spinal anesthesia. Based on dynamic changes in preoperative and intraoperative heart rate, blood pressure, perfusion index, and waveform characteristics of electrocardiography and pulse oximetry, a prognostic model was developed to predict the occurrence of hypotension after spinal anesthesia.

Study Overview

Status

Not yet recruiting

Conditions

Intervention / Treatment

Study Type

Observational

Enrollment (Estimated)

145

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Locations

  • China
    • Guangdong
      • Shenzhen, Guangdong, China, 518000
        • Peking University Shenzhen Hospital

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

Singleton pregnant women aged ≥18 years with gestational age ≥37 weeks, scheduled for cesarean section.

Description

Inclusion Criteria:

  • Singleton pregnant women aged ≥18 years with gestational age ≥37 weeks, scheduled for cesarean section.

Informed consent was obtained from all participants.

Exclusion Criteria:

  • Emergency cesarean sections or cases requiring general anesthesia. Maternal age < 18 years. Major obstetric complications (e.g., placenta previa, gestational hypertension, preeclampsia) or significant cardiovascular/cerebrovascular diseases.

Body Mass Index (BMI) ≥ 36 kg/m². Gestational age < 36 weeks or > 41 weeks. Contraindications to neuraxial anesthesia. Refusal to participate.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Incidence of hypotension
Time Frame: from spinal anesthesia induction to fetal delivery
Hypotension was defined as a mean arterial pressure (MAP) < 65 mmHg.
from spinal anesthesia induction to fetal delivery

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Peking University Shenzhen Hospital

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

July 13, 2026

Primary Completion (Estimated)

September 30, 2026

Study Completion (Estimated)

July 1, 2027

Study Registration Dates

First Submitted

July 1, 2026

First Submitted That Met QC Criteria

July 1, 2026

First Posted (Actual)

July 8, 2026

Study Record Updates

Last Update Posted (Actual)

July 8, 2026

Last Update Submitted That Met QC Criteria

July 1, 2026

Last Verified

July 1, 2026

More Information

Terms related to this study

Keywords

Other Study ID Numbers

  • 2026-158

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

Clinical Trials on Cesarean Section

Clinical Trials on Standard clinical spinal anesthesia and routine intraoperative monitoring

Search Similar Trials

Sponsors and Collaborators

Medical Conditions

Drug Interventions

CROs by country

CROs in Serbia

Conditions

Rare Diseases

Drug Interventions

Dietary Supplements

Sponsor/Collaborators

Locations

3
Subscribe