Use of the SNAP II Electroencephalography (EEG) Monitor in Outpatients Undergoing Surgery/Procedures With Sedation

The purpose of this study is to determine if the SNAP II electroencephalography (EEG) monitor accurately reflects changes in sedation level in outpatients undergoing surgery or procedures with sedation.

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Key information

Conditions

Sedation

Age range

18 year and older

Sex eligibility

All sexes

Study type

Observational

Primary location

University of Wisconsin Hospital and Clinics

Madison, Wisconsin, 53792, United States

Who can participate

Healthy volunteers accepted: No

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

Inclusion criteria

American Society of Anesthesiologists (ASA) I, II or III physical status

Exclusion criteria

Use of inhalation general anesthesia
ASA IV physical status

Treatment and study plan

SNAP II EEG System

Other

A portable EEG monitor (SNAP II EEG System, Everest -St. Louis) is unique in that it monitors both low frequency EEG signals (1-40 Hz), which are typically used, and high frequency EEG signals (80-420 Hz), which are not usually used, and calculates a derived EEG parameter (the SNAP Index). The SNAP Index ranges from 100 (completely awake) to 0 (no brain activity) and has been shown in a few studies to correlate with increasing sedation and loss of consciousness in human volunteers and patients receiving general anesthesia during surgery.

Primary outcomes

Assessment of participant heterogeneity between SNAP Index and OASS Score.

Time frame: up to 1 day post op

The SNAP Index is a derived EEG (electroencephalogram) parameter (from the SNAP II EEG System) ranging from 100 (completely awake) to 0 (no brain activity). The Observer's Assessment of Alertness/Sedation Score (OASS) is a score derived from motor and sensory functions between 0 and 5 where 0 is unresponsive and 5 is awake.

Sponsors and collaborators

Lead sponsor

University of Wisconsin, Madison

Other

Registry information

Official study title

Use of the SNAP II EEG Monitor in Outpatients Undergoing Surgery/Procedures With Sedation

Important dates

Study start: 2005
Primary completion: 2009
Study completion: 2009
First posted: Sep 20, 2005
Registry last updated: Jan 24, 2019

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.

Published trials that share one or more normalized conditions with this study.

Completed