Accession Number : AD0622051

Title :   A STUDY OF THE MANNER IN WHICH MASK LEAKS CHANGE WITH VARYING NEGATIVE PRESSURES.

Descriptive Note : Research rept.,

Corporate Author : NAVAL SCHOOL OF AVIATION MEDICINE PENSACOLA FLA

Personal Author(s) : Fugitt,C. H.

Report Date : 29 JAN 1945

Pagination or Media Count : 10

Abstract : A study was made of the manner in which oxygen mask leaks change when subjected to varying negative pressures ranging from 1.0 to 7.0 cm. water. The 101 leaks studied may be divided into the following groups: 37 which decreased with added suction; 26 which increased with added suction; 10 in which the tendency of the leak to increase or decrease was reversed as the negative pressure was increased from 1.0 to 7.0 cm. water; 18 which were in excess of 600 cc. in 10 seconds and remained at this high level; 5 which were essentially independent of increased suction; and 5 which were not definite enough in their behavior to permit interpretation. Most mask leaks change with added suction, some improving in fit and other becoming worse. It is believed that 2.0 cm. water should be a satisfactory practical value to use for mechanical leak testers. (Author)

Descriptors :   (*OXYGEN MASKS, PRESSURE), (*GAS LEAKS, OXYGEN MASKS), TEST METHODS, LOW PRESSURE, LIFE SUPPORT

Distribution Statement : APPROVED FOR PUBLIC RELEASE