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Two quick tests could flag Who's at risk of blood pressure drops during anesthesia

NCT ID NCT07766967

Knowledge-focused Sponsor: University of Health Sciences Balikesir Hospital Eduation and Research Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting This study
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Aug 17, 2026 · Last updated Aug 18, 2026 · Updated 1 time

Summary

This study looks at whether two simple bedside tests—the Passive Leg Raising (PLR) test and the Pleth Variability Index (PVI)—can predict a temporary drop in blood pressure that sometimes happens during a lung-opening procedure called an Alveolar Recruitment Maneuver (ARM). ARM is used during general anesthesia to prevent lung collapse and improve oxygen levels, but it can cause hypotension in some patients. The study will enroll 70 adults having elective non-cardiac, non-thoracic surgery under general anesthesia. Before each ARM, the PLR test and PVI will be measured to see if they can identify who is at risk, potentially allowing doctors to take preventive steps and make the procedure safer.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Passive Leg Raising (PLR) test and Pleth Variability Index (PVI) as predictive tools
What this could lead to
If these tests work, doctors could identify at-risk patients before a lung-opening maneuver, preventing dangerous blood pressure drops during surgery.
What could go wrong
This is a small observational study, so results may not apply to all patients. The tests might not reliably predict hypotension, and the study does not test a treatment.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 70 people

The number the study aims to enrol. It can still change while the study runs.

Expected to start

Jul 2026

An estimate. Start dates often move.

Expected to finish

Sep 2026

An estimate. End dates often move.

Lead sponsor

A government agency

The lead sponsor is a government body.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 years and older

Sex

Anyone

Healthy volunteers

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

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria:Age 18 years or older ASA physical status I or II Scheduled for elective non-cardiac, non-thoracic surgery under general anesthesia Able to provide written informed consent - Exclusion Criteria:Cardiac or thoracic surgery Hemodynamic instability at baseline (MAP \<65 mmHg or requirement for vasopressors) Severe valvular heart disease or known cardiac dysfunction (EF \<40%) Chronic obstructive pulmonary disease (COPD) or severe respiratory disease Atrial fibrillation or other significant arrhythmias Peripheral vascular disease affecting PVI signal quality Body mass index (BMI) \>40 kg/m² Emergency surgery Refusal to participate or inability to provide informed consent Pregnancy \-

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Conditions

The condition(s) this trial relates to.

hypotensive disorder Pulmonary Atelectasis

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Atelectasis Fluid responsiveness General anesthesia using endotracheal intubation Hypotension drug-induced Mechanical ventilation

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Balıkesir Atatürk City Hospital

    Balıkesir, Altıeylül, 10100, Turkey (Türkiye)

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