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New monitor may help doctors give just the right amount of pain medicine during surgery

NCT ID NCT05615441

Symptom relief Sponsor: Yonsei University 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
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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study tested whether a special monitor that tracks pain signals during anesthesia can help doctors use less pain medicine during knee surgery. 54 adults having arthroscopic knee surgery were randomly assigned to receive either standard monitoring or the extra pain monitor. The goal was to see if the monitor led to lower pain medicine use and better pain control after surgery.

What this could mean

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

Active substance
Analgesia Nociception Index monitor (device)
What this could lead to
If it works, this could help doctors give just the right amount of pain medicine during surgery, leading to better pain control and fewer side effects.
What could go wrong
This is a small, early-stage study with only 54 people. The monitor may not actually reduce pain medicine needs or improve recovery in a meaningful way.

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

54 people

The number who actually took part.

Started

Jul 2023

Finished

Nov 2025

Lead sponsor

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.

Ages

19 to 64 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: Adult patients between 19 and 64 years of age, ASA class I\~III, scheduled for arthroscopic knee surgeryunder general anesthesia. Exclusion Criteria: Patient refusal, patients unable to read consent form, active URI or uncontrolled asthma, pneumonia, history of allergies to benzodiazepines, decreased liver or kidney function, heart failure of ejection fraction\<55%, pregnant or breastfeeding patients, history of substance abuse/addiction

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As listed by the trial registrant

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

Adult patients aged 19-64, scheduled for elective arthroscopic knee surgery

Contacts and locations

Locations

  • Yonsei University Health System, Severance Hospital

    Seoul, South Korea