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Can tilting the bed improve pain detection in surgery?

NCT ID NCT02193412

Knowledge-focused Sponsor: University Hospital, Lille 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 looked at whether changing a patient's body position during surgery affects a device called the Analgesia Nociception Index (ANI), which is used to measure pain under anesthesia. Thirty neurosurgery patients were monitored as their bed was tilted head-up or head-down. The goal was to see if these position changes influenced the ANI readings, which could help anesthesiologists better assess pain in the future.

What this could mean

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

What this could lead to
If successful, this could help doctors better measure pain in patients under anesthesia, leading to more precise pain management during surgery.
What could go wrong
This is a small, early-stage study with only 30 participants. It focuses on a monitoring tool, not a treatment, so direct patient benefits are uncertain.

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

30 people

The number who actually took part.

Started

Jan 2015

Finished

Oct 2017

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

18 to 70 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: * neurosurgical operation requiring invasive monitoring of arterial blood pressure Exclusion Criteria: * pacemaker, arrhythmia * chronic medication with beta blocker * possible disorder of autonomic nervous system: diabetes, alcoholism, chronic pain * anticholinergic drug administration before measures * intracranial hypertension * no social security coverage * pregnancy

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Conditions

The condition(s) this trial relates to.

Hypovolemia Nociceptive Pain

As listed by the trial registrant

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

Hypovolemia Somatic pain

Contacts and locations

Locations

  • University Hospital

    Lille, Nord, 59000, France

More trials for these conditions

Other studies related to the condition(s) this trial covers.