UnknownNot Applicable

Determination of the ED50 and ED95 of Prophylactic Norepinephrine Infusion for Preventing Post-induction Hypotension in Elderly Patients Undergoing Major Abdominal Surgery

China40 participantsStarted 2022-12-01

Plain-language summary

The goal of this clinical trial is to determine the ED50 and ED95 of prophylactic norepinephrine infusion for preventing post-induction hypotension in elderly patients undergoing major abdominal surgery using up-and-down sequential method . The main question it aims to answer is: What is the effective concentration of prophylactic norepinephrine infusion for preventing post-induction hypotension in elderly patients. Participants will receive different concentrations of norepinephrine infusion at the beginning of anesthesia induction until 15 minutes after intubation.

Who can participate

Age range

65 Years – 80 Years

Sex

ALL

See this in plain English?

AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.

Inclusion Criteria: * aged 65 to 80 years * Undergoing major abdominal surgery * American Society of Anesthesiologists (ASA) physical status of I/II/III Exclusion Criteria: * Patient refusal * Severe untreated or uncontrolled hypertension despite medications * Bradycardia (heart rate \< 50 beat per minute) * Cardiac morbidities, heart block greater than the first degree * Severe hepatic and renal dysfunction * hyperthyroidism * vascular diseases * BMI\>30 * Monoamine oxidase inhibitors were used 2 weeks before surgery

Questions worth asking your doctor

Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.

1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?

Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.

Questions for the trial coordinator

The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.

1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?

A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.

What they're measuring

Incidence of hypotension

Timeframe: 15 minutes after intubation

Trial details

NCT IDNCT05637164

SponsorSecond Affiliated Hospital, School of Medicine, Zhejiang University

Sponsor typeOTHER

Study typeINTERVENTIONAL

Primary completion2023-05-30

Contact for this trial

Min Yan, Doctor

13757118632 zryanmin@zju.edu.cn

View on ClinicalTrials.gov More Norepinephrine trials