Effects of Partial Sleep Deprivation on Cognitive Function of Anesthesiologists (sleep)

December 2, 2019 updated by: Bassant M. Abdelhamid, Cairo University

Effects of Partial Sleep Deprivation Following Night Shift on Cognitive Functions of Egyptians Anesthesiologists as a Representative of Developing Countries; Prospective Observational Study

The purpose of this study was to evaluate differences in cognitive functions at baseline and following night shift at a trauma center among faculty anesthesiologists.

Study Overview

Detailed Description

Anesthesiology is one of the few health-care professions that often demands split-second decisions. This is especially true in a trauma setting where the situation in the operating room can change drastically in a few seconds. Anesthesiologists who cover trauma calls overnight are subject to long work shifts and demanding schedules that may adversely affect their performance. In combination with the disruption of circadian rhythm that can occur with night shift work, decline in performance from the long work shifts can lead to errors in judgment.

An anonymous questionnaire included two groups of different items were used. Items of the first group are about the personal data i.e. age, sex, marital status and parenting status, consumption behavior (tea, coffee, carbonated drinks, tobacco, anxiolytics, antidepressants, psychotropic agents and sport), and professional activity (number of extended worked shifts per month, number of weekends worked per month).

Items of the second group are related to the night shift itself i.e. number of cases, and the rest hours during the shift.

Psychomotor Vigilance Task, Karolinska Sleepiness Scale, Epworth Sleepiness Scale and Trail Making Test before and after the shift were performed.

Study Type

Observational

Enrollment (Actual)

50

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

      • Cairo, Egypt
        • Anesthesia Department

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

23 years to 28 years (Adult)

Accepts Healthy Volunteers

N/A

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

Participants included anesthesiologists employed at Kasr El- Ainy Hospital between the ages of 25-28 years of age and with varying levels of experience.

Description

Inclusion Criteria:

  • Full-time faculty anesthesiologists employed at Kasr El- Ainy Hospital.
  • Both genders
  • Ages of 25-28 years.
  • Varying levels of experience.

Exclusion Criteria:

  • History of chronic neurological disease.
  • History of psychiatric disorders such as:

    • Episode of major depression within the past 2 years.
    • Lifetime history of schizophrenia.
    • Other psychotic illness or bipolar illness.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Observational Models: Cohort
  • Time Perspectives: Prospective

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
study group
anesthesia residents with 24 hours working shift
PVT has emerged as one of the most widely used tools to assess vigilant attention. Vigilance can be defined as sustained attention and tonic alertness. In sleep deprived individuals, vigilance is the component of cognition that is most consistently and dramatically affected. The PVT is a reaction-time test that allows the collection of a large amount of data in a relatively short period of time. These characteristics increase the sensitivity of the test to detect even small changes in vigilant attention, which can wax and wane within seconds.
Other Names:
  • PVT

Epworth Sleepiness Scale a set of questions that assess excessive daytime sleepiness during professional activities and vacations.

This scale was designed to assess the efficiency of sleep apnea treatments. It is also used for the subjective sleepiness assessment based on the likelihood of falling asleep in different everyday life situations. This results in an overall score.

Other Names:
  • ESS

The KSS is assumed to be an ordinal scale with a unitary structure. KSS scores may require standardization to control for differences between subjects. The changes observed in the EEG/EOG with drowsiness do not usually appear until KSS scores reach 7 and higher. Lower KSS scores (<5) may reflect differences in the subjective awareness of fatigue as much, or more than, levels of drowsiness.

Higher KSS scores (7+) may refer more specifically to the state of drowsiness because the subject may then have experienced involuntary dozing behavior, with "lapsing" episodes and brief loss of awareness of the here-and-now, followed by arousal and the return of awareness, including some awareness of recently having dozed off

Other Names:
  • KSS
Most variants of this test, which was apparently introduced in 1938 by Partington (Partington & Leiter, 1949), have at least two conditions. In condition A the participant is to draw lines to connect circled numbers in a numerical sequence (i.e., 1-2-3, etc.) as rapidly as possible. In condition B the participant is to draw lines to connect circled numbers and letters in an alternating numeric and alphabetic sequence (i.e., 1-A-2-B, etc.) as rapidly as possible.
Other Names:
  • TMT

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
The Psychomotor Vigilance Task test
Time Frame: 24 hours
the participant presses a response button as soon as a visual stimulus appears on the screen. There is standard version of the PVT with duration of 10 min. The shorter version, PVT brief, with duration of 3 minutes have been used in the current study using PEBL 2 software computer program and reaction times (RTs) were displayed to the study participants in milliseconds.
24 hours

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Epworth Sleepiness Scale
Time Frame: at the beginning of the shift, at the end of 24 shift and at the end of the following working day
the subjects are asked to rate on a scale from 0 to 3 their usual probability of dozing off in 8 different situations, with 0= "would never doze" and 3 = "a high chance of dozing". The total ESS score, ranging from 0 to 24, is the sum score of the eight times. Normal day time sleepiness is represented with scores from 0 to 10 detect, while increased levels of excessive daytime sleepiness are represented with scores of 11-24 represent.
at the beginning of the shift, at the end of 24 shift and at the end of the following working day
Karolinska sleeping scale
Time Frame: 24 hours
self-assessed 9-point Likert scale for subjective assessment of the individual's level of drowsiness at a time. It has word descriptors to describe the scale points from 1= "very alert" to 9= "very sleepy, fighting sleep, an effort to keep awake".
24 hours
Trail making test
Time Frame: 24 hours
The TMT is formed of two parts. In TMT-A, the subject is asked to draw lines sequentially connecting 25 encircled numbers distributed on a paper sheet. In TMT-B except, the subject is asked to alternate between numbers and letters (e.g., 1, A, 2, B, 3, C, etc.). Each part is represented by time in seconds that required to finish the task.
24 hours

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

January 2, 2019

Primary Completion (Actual)

May 28, 2019

Study Completion (Actual)

June 28, 2019

Study Registration Dates

First Submitted

December 16, 2018

First Submitted That Met QC Criteria

December 19, 2018

First Posted (Actual)

December 24, 2018

Study Record Updates

Last Update Posted (Actual)

December 3, 2019

Last Update Submitted That Met QC Criteria

December 2, 2019

Last Verified

December 1, 2019

More Information

Terms related to this study

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

Undecided

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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