Call- Associated Acute Fatigue in Surgical Residency (CAFIS)

January 26, 2011 updated by: Philipps University Marburg Medical Center

Call-associated Acute Fatigue in Surgical Residency- Subjective Perception or Objective Fact?

The study aimed to evaluate the effects of 24-Hour-Call-associated acute partial sleep deprivation on surgical residents' technical and cognitive performance in a virtual reality (VR) setting. Physiological parameters were used to quantify fatigue in respect to hours of sleep and subjective degrees of sleepiness. Technical performance and cognitive skills were assessed through low- and high fidelity tasks usig the VR- simulator LapSim. Objective alertness was measured by the standardized d2-Paper-Pencil-Test. Cited assessments were performed on three consecutive mornings- pre- and post-call as after 24 hours resting.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Summary Background Data:

The effect of acute partial sleep deprivation on surgical proficiency is still controversially discussed. The present study is the first to measure objective physiological parameters of fatigue in respect to subjective perceptions of sleepiness in VR- research of surgical performance.

Methods:

38 surgeons were explored on three consecutive mornings: prior to a 24-Hour- Call, post-call and after 24 hours resting. Hours of sleep were recorded. Subjective alertness was assessed using the standardized Stanford-Sleepiness-Scale (SSS). Saliva cortisol concentrations and pupillary activity were measured by ELISA and pupillography. The VR-simulator LapSim® was used to assess technical skills through defined low- fidelity VR-tasks "cutting", "clip applying" and cognitive skills through defined high-fidelity VR-tasks "intracorporal suturing", "VR-cholecystectomy". Objective alertness was measured by the standardized d2-Paper-Pencil-Test.

Study Type

Observational

Enrollment (Actual)

38

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

  • Germany
    • Hessen
      • Marburg, Hessen, Germany, 35041
        • Department of Visceral-, Thoracic- and Vascular Surgery, Univeristy Hospital Giessen and Marburg- Location Marburg

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

28 years to 50 years (Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

  • 38 surgeons (20 male, 18 female)
  • 4 senior registrars, 15 junior registrars, 19 interns
  • age 24-48 years; mean 30 years

Description

Inclusion Criteria:

  • Surgical interns, junior- or senior residents
  • Successful completion of a minimum of 10 basic VR- tasks with the VR- simulator LapSim: "camera navigation", "coordination", "clip applying", "Cutting", and "diathermy cutting" and a minimum of 5 sessions of advanced VR- tasks: "fine dissection", "intracorporal suturing" and "VR- cholecystectomy"
  • Voluntary participation
  • Written informed consent

Exclusion Criteria:

  • Lack of required VR- training
  • Lack of informed consent

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

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Technical and cognitive performance
Time Frame: 3 days
Technical and cognitive performance was assessed in a VR-setting of defined parameters of performance and the d2-Paper-Pencil-Test on three consecutive mornings- pre- and post call and after 24 hours resting.
3 days

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Sleepiness and Fatigue
Time Frame: 4 months
Sleepiness was assessed by Stanford Sleepiness Sclae (SSS) and fatigue was measured through pupillography and saliva cortisol concentration on three consecutive mornings- pre- and post call and after 24 hours resting.
4 months

Collaborators and Investigators

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

Sponsor

Philipps University Marburg Medical Center

Investigators

  • Principal Investigator: Katja KM Maschuw, MD, Philipps University Marburg Medical Center

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

October 1, 2007

Primary Completion (Actual)

February 1, 2008

Study Completion (Actual)

February 1, 2008

Study Registration Dates

First Submitted

January 26, 2011

First Submitted That Met QC Criteria

January 26, 2011

First Posted (Estimate)

January 27, 2011

Study Record Updates

Last Update Posted (Estimate)

January 27, 2011

Last Update Submitted That Met QC Criteria

January 26, 2011

Last Verified

June 1, 2008

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • Philipps-University Marburg

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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