Effects of the M40 Respirator on Pulmonary Function Measurements

Effects of the M40 Respirator on Pulmonary Function Measurements

Soldiers wearing protective respirators must contend with the burden the equipment places on their respiratory systems. Breathing resistance is imposed by the purifying canister, the inhalation and exhalation valves, and the internal flow path. Static pulmonary function tests performed on 23 militar...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Strickler, Linda C, Kulle, Thomas J, Solivan, Jose, Froehlich, Harry L
Format: Report
Sprache:eng
Schlagworte:
ARMY PERSONNEL
BREATHING RESISTANCE
CANISTERS
EXHALATION
FLOW
FLOW FIELDS
INHALATION
INTERNAL
Life Support Systems
M40 RESPIRATORS
MEASUREMENT
Protective Equipment
PULMONARY FUNCTION
PURIFICATION
RESISTANCE
RESPIRATION
RESPIRATORS
RESPIRATORY SYSTEM
STATIC TESTS
Stress Physiology
VALVES
VENTILATION
VOLUME
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Beschreibung
Zusammenfassung:Soldiers wearing protective respirators must contend with the burden the equipment places on their respiratory systems. Breathing resistance is imposed by the purifying canister, the inhalation and exhalation valves, and the internal flow path. Static pulmonary function tests performed on 23 military volunteers, 21 - 32 years old, wearing the M40 respirator without canister showed only two of seven specific pulmonary function measurements (PIF and PEF) to be statistically, significantly decreased (79% and 83% of Control, respectively). Attaching the canister resulted in these flow measurements further decreasing to 76% and 79% of Control. Maximum Voluntary Ventilation significantly decreased only for the M40 with canister (71% of Control), while it was 92% of Control for the M40 with canister. The remaining flow and volume measurements were not significantly changed.