A quick heart check might flag who will crash after spinal anesthesia
NCT ID NCT07765342
First seen Aug 14, 2026 · Last updated Aug 14, 2026
Summary
This study looks at whether a simple heart measure, called the diastolic shock index, can predict a sudden drop in blood pressure after spinal anesthesia. It will include adults aged 50 and older having elective inguinal hernia surgery under spinal anesthesia. Researchers will record routine heart and blood pressure readings before and after the anesthesia to see if this index, along with other shock indices, can identify who is likely to develop postspinal hypotension. The goal is to improve safety by spotting at-risk patients early, without adding any extra procedures.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- No intervention is tested; the study observes routine spinal anesthesia and records hemodynamic parameters.
- What this could lead to
- If the diastolic shock index proves accurate, it could help doctors identify patients at higher risk of postspinal hypotension and take preventive steps.
- What could go wrong
- This is a small observational study, so results may not apply broadly. The index may not outperform existing measures, and no treatment is being tested.
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Study facts
What this study's own registry entry says, in plain language.
- Participants
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About 85 people
The number the study aims to enrol. It can still change while the study runs.
- Expected to start
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Aug 2026
An estimate. Start dates often move.
- Expected to finish
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Mar 2027
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
Who is studied
The study population will consist of patients aged 50 years and older who are scheduled to undergo elective unilateral inguinal hernia surgery under spinal anesthesia at the University of Health Sciences Haseki Training and Research Hospital. Eligible patients with American Society of Anesthesiologists physical status I-III who provide written informed consent will be included. A minimum of 85 patients is planned for enrollment.
- Ages
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50 years and older
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Age 50 years or older * Scheduled for elective unilateral inguinal hernia surgery * Scheduled to undergo surgery under spinal anesthesia * American Society of Anesthesiologists physical status I-III * Provision of written informed consent Exclusion Criteria: * Refusal to participate in the study * Emergency surgery * Bilateral inguinal hernia surgery * Contraindication to spinal anesthesia * Failure of spinal anesthesia or conversion to general anesthesia due to failed spinal block * Requirement for additional general anesthesia or deep sedation during surgery * Operation duration exceeding 120 minutes * Atrial fibrillation, atrial flutter, frequent ventricular ectopy, or other arrhythmias preventing reliable heart rate assessment * Presence of a permanent cardiac pacemaker * Severe valvular heart disease * New York Heart Association class III-IV heart failure * Preoperative use of vasopressor or inotropic therapy * Severe hepatic failure or end-stage renal disease * Neurological disease that may significantly affect autonomic nervous system function * Preoperative hemodynamic instability, defined as systolic arterial pressure \<90 mmHg or \>180 mmHg, or heart rate \<50 or \>120 beats/min * Missing study data or inability to obtain records in accordance with the study protocol
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How to take part
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