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Heat Stress and Physiological Strain of Permeable vs. Impermeable CB Protective Garment

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT01221012
Recruitment Status : Unknown
Verified March 2012 by amit druyan, Medical Corps, Israel Defense Force.
Recruitment status was:  Recruiting
First Posted : October 14, 2010
Last Update Posted : March 29, 2012
Information provided by (Responsible Party):
amit druyan, Medical Corps, Israel Defense Force

Brief Summary:

Current protective clothing of any kind, especially the nuclear-biological-chemical (NBC) protective garments, amplify thermal stress because of the inherent properties of the clothing material. High insulation coefficient and low water vapor permeability of the protective cloth limit the ability of sweat to readily evaporate, which consequently result with a significant elevation of body temperature and with excessive body fluid loss (because of inefficient sweating) that might result with significant dehydration.

Combat soldiers require to perform intense physical activities under hostile environmental conditions, including in contaminated areas that need the use of protective garments. The ability to fulfill a mission derives from the soldier's professionalism and from his physiological limits. It is well established that wearing protective garments affect tolerance time (TT) and performance.

To operate in contaminated areas suitable protective garments should be worn. The inherent characteristics of the current protective garments limit, however, the effective working periods with such an ensemble, which is further aggravated in hot climate. Thus, in an attempt to increase TT and enhance work effectiveness, improved protective garments, which result with a lessened heat-stress, are under different stages of development.

The relative influence of air permeability properties, garment weight and garment construction on heat stress and physiological strain will be investigated.

The results will be quantified in terms of body temperatures, heart rate, fluid balance, subjective sensation and the maximum wear time (if necessary extrapolated).

Condition or disease
Heat Tolerance

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Study Type : Observational
Estimated Enrollment : 12 participants
Observational Model: Case Control
Study Start Date : December 2010
Estimated Primary Completion Date : December 2013
Estimated Study Completion Date : December 2014

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Heat Illness

men wearing Semipermeable garment
air permeable garment type BP2
air permeable garment type BP3
air permeable garment type MO
air permeable garment type BP1

Primary Outcome Measures :
  1. The physiological burden of different CB Protective Garments [ Time Frame: 1 year ]

    The physiological burden of different CB Protective Garments will be mesured by a heat tolerance test (HTT).

    The subjects will undergo an HTT wearing different CB Protective Garments and the results which indicate physiological burden will be compared between the different garments.

Secondary Outcome Measures :
  1. Rectal temperature [ Time Frame: 1 year ]
    The rectal temperature will be mesured by rectal thermistore.

  2. Skin temperature [ Time Frame: 1 year ]
    The skin temperature will be mesured by skin thermistores conected to 3 different sites (chest, leg and arm).

  3. Heart rate [ Time Frame: 1 year ]
    Heart rate will be mesured by a polar watch.

  4. Sweat rate [ Time Frame: 1 year ]
    The sweat rate will be calculated in each HTT from the subject's weight before and after the test and his water balance.

Information from the National Library of Medicine

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Ages Eligible for Study:   20 Years to 30 Years   (Adult)
Sexes Eligible for Study:   Male
Accepts Healthy Volunteers:   Yes
Sampling Method:   Non-Probability Sample
Study Population
Twelve young (20-30 yr) male subjects will voluntarily participate in this study

Inclusion Criteria:

  • Twelve young (20-30 yr) male subjects will voluntarily participate in this study. The potential participants will be informed of the study's nature, purpose and medical risks. Their inclusion in the study requires the medical clearance by the study's physician (CRF) and after having filled out and sign an informed consent form

Exclusion Criteria:

  • heart conditions, blood pressure higher than 140/90 mmHg, known diabetes or any skin illness or lesions. Also be excluded are potential participants who were ill during the 2 weeks prior to the study

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT01221012

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Contact: Amit Druyan, M.D 972-03-7377180

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Sheba medical center Recruiting
Ramat Gan, Israel
Contact: Amit Druyan, M.D   
Sponsors and Collaborators
Medical Corps, Israel Defense Force
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Principal Investigator: Amit Druyan, M.D Medical Corps, Israel Defense Force

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Responsible Party: amit druyan, Principal Investigator, Medical Corps, Israel Defense Force Identifier: NCT01221012     History of Changes
Other Study ID Numbers: 883-2009-CLIT
First Posted: October 14, 2010    Key Record Dates
Last Update Posted: March 29, 2012
Last Verified: March 2012