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A fingertip sensor might foresee blood pressure crashes during spinal anesthesia

NCT ID NCT07747441

Knowledge-focused Sponsor: Ankara Etlik City Hospital Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 05, 2026 · Last updated Aug 11, 2026 · Updated 3 times

Summary

This study looks at whether a simple, non-invasive measure called the perfusion index (PI) can predict a sudden drop in blood pressure (hypotension) that often happens during spinal anesthesia for knee surgery. The PI, measured with a standard pulse oximeter on the finger, reflects blood flow and may indicate how susceptible a person is to this side effect. Researchers will monitor 150 healthy adults undergoing knee arthroscopy to see if a higher baseline PI is linked to a higher risk of hypotension. If it is, doctors could use this easy test to identify at-risk patients and take preventive steps.

What this could mean

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

Active substance
Perfusion index measurement via pulse oximetry
What this could lead to
If successful, this could give doctors a simple, non-invasive way to predict and prevent dangerous blood pressure drops during spinal anesthesia, improving safety for many surgeries.
What could go wrong
This is an observational study, so it cannot prove cause and effect. The predictive value may not be strong enough to change clinical practice, and results may not apply to all patient groups.

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.

Participants

About 150 people

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

Started

Aug 2026

Expected to finish

Dec 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.

Who is studied

Adult patients with American Society of Anesthesiologists physical status I or II who are scheduled for elective knee arthroscopy under spinal anesthesia at Etlik City Hospital will be consecutively screened for participation.

Ages

18 to 65 years

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: * Between the ages of 18-65 * Having an ASA Score of I-II * Including data collection of parts that underwent knee arthroscopy Exclusion Criteria: * Patients under 18 and over 65 years of age * Patients with ASA Score III and above

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Conditions

The condition(s) this trial relates to.

hypotensive disorder

As listed by the trial registrant

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

Anesthesia, spinal Arthroscopy Hypotension Spinal anesthesia-induced hypotension

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

  • Ankara Etlik City Hospital

    RECRUITING

    Ankara, Yenimahalle\Ankara, 06170, Turkey (Türkiye)

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