Heat Stress and Physiological Strain of Permeable vs. Impermeable CB Protective Garment
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).
Descripción general del estudio
Estado
Condiciones
Tipo de estudio
Inscripción (Anticipado)
Contactos y Ubicaciones
Ubicaciones de estudio
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Ramat Gan, Israel
- Reclutamiento
- Sheba Medical Center
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Contacto:
- Amit Druyan, M.D
- Correo electrónico: Amit.Druyan@sheba.health.gov.il
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Criterios de participación
Criterio de elegibilidad
Edades elegibles para estudiar
Acepta Voluntarios Saludables
Géneros elegibles para el estudio
Método de muestreo
Población de estudio
Descripción
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
Plan de estudios
¿Cómo está diseñado el estudio?
Detalles de diseño
Cohortes e Intervenciones
Grupo / Cohorte |
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men wearing Semipermeable garment
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air permeable garment type BP2
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air permeable garment type BP3
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air permeable garment type MO
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air permeable garment type BP1
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¿Qué mide el estudio?
Medidas de resultado primarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
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The physiological burden of different CB Protective Garments
Periodo de tiempo: 1 year
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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. |
1 year
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Medidas de resultado secundarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
|---|---|---|
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Rectal temperature
Periodo de tiempo: 1 year
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The rectal temperature will be mesured by rectal thermistore.
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1 year
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Skin temperature
Periodo de tiempo: 1 year
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The skin temperature will be mesured by skin thermistores conected to 3 different sites (chest, leg and arm).
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1 year
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Heart rate
Periodo de tiempo: 1 year
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Heart rate will be mesured by a polar watch.
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1 year
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Sweat rate
Periodo de tiempo: 1 year
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The sweat rate will be calculated in each HTT from the subject's weight before and after the test and his water balance.
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1 year
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Colaboradores e Investigadores
Patrocinador
Investigadores
- Investigador principal: Amit Druyan, M.D, Medical Corps, Israel Defense Force
Fechas de registro del estudio
Fechas importantes del estudio
Inicio del estudio
Finalización primaria (Anticipado)
Finalización del estudio (Anticipado)
Fechas de registro del estudio
Enviado por primera vez
Primero enviado que cumplió con los criterios de control de calidad
Publicado por primera vez (Estimar)
Actualizaciones de registros de estudio
Última actualización publicada (Estimar)
Última actualización enviada que cumplió con los criterios de control de calidad
Última verificación
Más información
Términos relacionados con este estudio
Otros números de identificación del estudio
- 883-2009-CLIT
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