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NCT Number: NCT07013734

Patient Positioning and Its Influence on BIS, NOL, and Cerebral Oxygenation in Anesthetized Patients

The goal of this observational study is to find out how changes in body position during surgery might affect brain monitoring results in patients who are under general anesthesia.The main question it aims to answer is:

- Does patient positioning have an impact on Bispectral Index (BIS) and Nociception Level (NOL) index monitoring (which are values of awareness in anesthesized patients).

Participants will undergo their surgery as planned, except for these extra features:

* Extra monitors placed to check brain activity, pain response, and brain oxygen levels. * Before the surgery, while the patient is asleep, the patient's table will be moved into two different positions for 2 minutes each to see if the values on the monitor change.

Participants will then have to answer a short questionnaire after surgery about their memories before and after the anesthesia.

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Key information

Conditions

Monitoring of Depth of Anesthesia

Age range

18 year–80 year

Sex eligibility

All sexes

Study type

Observational

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Fully consented, adult patients above 18 years old;
  • Supine positioning during the surgery;
  • Surgery requiring patient positioning with Vacuform mats.

Exclusion criteria

  • Patient with Body Mass Index (BMI) ≥ 35;
  • Patients over 80 years old.

Treatment and study plan

Primary outcomes

  1. Variation in Bispectral Index (BIS)

    Time frame: Perioperative period

Secondary outcomes

  1. Variation of Nociception Level (NOL) Index

    Time frame: Perioperative period

  2. Variation of the patient's cerebral saturation measured with cerebral oximetry

    Time frame: Perioperative period

Sponsors and collaborators

Lead sponsor

Ciusss de L'Est de l'Île de Montréal

Other

Registry information

Important dates

Study start
2025
Primary completion
2026
Study completion
2026
First posted
Jun 10, 2025
Registry last updated
Jun 10, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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