MedTrace Logo

Propofol EC50 for Inducing Loss of Consciousness in General Combined Epidural Anesthesia

NCT05124704 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 60

Last updated 2025-01-09

Study results available
· View outcomes & findings →

Summary

The beneficial of perioperative usage of thoracic epidural anesthesia and analgesia in various thoracic and upper abdominal surgery are well studied. However, intraoperative data are lacking whether combined thoracic epidural and general anesthesia have effect on the median (50%) effective effect-concentration (EC50) of propofol for inducing loss of consciousness (LOC). We performed this study among patients undergoing open gastrectomy in gastric cancer patients.

Sixty patients undergoing open gastrectomy were randomly assigned to two groups with thoracic combined general anesthesia (TEA+GA) or general anesthesia (GA) alone. Target-controlled infusion (TCI) of propofol was used for anesthesia induction. The initial propofol concentration of target effect-site (Ceprop) was 3.5 ug/ml and was increased stepwise by 0.5ug/ml at each 4 min intervals by an un-down sequential method to reach LOC. The predicted Ceprop at the time of LOC, intravenous anesthetics, vasopressor requirement, emergency time from anesthesia and postoperative numeric rating scale (NRS) were recorded and analyzed between two groups.

Conditions

Interventions

DRUG

5-8ml 0.375% ropivacaine

5-8ml of 0.375% ropivacaine depend on the height and weight of the patient was administrated through the epidural catheter at least 20 min before induction in experimental group. Followed by a continuous infusion of 4-6 ml/h using micro-infusion pump after induction during surgery.

OTHER

5-8ml normal saline

5-8ml of normal saline depend on the height and weight of the patient was administrated through the epidural catheter at least 20 min before induction. Followed by a continuous infusion of 4-6 ml/h using micro-infusion pump after induction during surgery.

Sponsors & Collaborators

  • Wang Jiangling

    lead OTHER

Principal Investigators

  • Jiangling Wang, M.D · Cancer Hospital of The University of Chinese Academy of Sciences

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Model
SINGLE_GROUP

Eligibility

Min Age
18 Years
Max Age
75 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2021-11-20
Primary Completion
2022-05-25
Completion
2022-05-25

Countries

  • China

Study Locations

More Related Trials

Entities

Diseases

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT05124704 on ClinicalTrials.gov