Author: E. B. McFadden
Publisher:
ISBN:
Category : Aerospace medicine
Languages : en
Pages : 24
Book Description
The report describes evaluation of two prototype phase dilution rebreathing masks as compared to an open port rebreathing mask design. Human subjects wearing the prototype masks and engaged in three minute periods of rest and exercise were exposed to altitudes of 14,000, 18,000, 25,000, 30,000 and 34,000 feet in an altitude chamber. Each subject was instrumented to obtain a variety of physiological parameters including end expiratory gas composition, blood oxygen saturation (ear oximetry), ECG, and respiratory rate (impedance pneumograph). Oxygen flow and system pressure as provided by an automatic constant-flow regulator were also determined. The automatic constant-flow regulator when used in conjunction with either of the prototype phase dilution rebreather test masks and proper orifices maintained the subjects' indicated blood oxygen saturations equal to or in excess of their ground level (1,273 feet) baselines. With the same oxygen flow rates the prototype porous and dilution valve masks provided higher tracheal oxygen partial pressures than the open port masks at all altitudes tested during rest and exercise. The prototype phase dilution rebreather masks appear to be more efficient since at the same flow rates a greater amount of oxygen was derived from the supply and less oxygen lost to the ambient environment as compared to the open port type mask. (Author).
Performance Characteristics of Constant-flow Phase Dilution Oxygen Mask Designs for General Aviation
Author: E. B. McFadden
Publisher:
ISBN:
Category : Aerospace medicine
Languages : en
Pages : 24
Book Description
The report describes evaluation of two prototype phase dilution rebreathing masks as compared to an open port rebreathing mask design. Human subjects wearing the prototype masks and engaged in three minute periods of rest and exercise were exposed to altitudes of 14,000, 18,000, 25,000, 30,000 and 34,000 feet in an altitude chamber. Each subject was instrumented to obtain a variety of physiological parameters including end expiratory gas composition, blood oxygen saturation (ear oximetry), ECG, and respiratory rate (impedance pneumograph). Oxygen flow and system pressure as provided by an automatic constant-flow regulator were also determined. The automatic constant-flow regulator when used in conjunction with either of the prototype phase dilution rebreather test masks and proper orifices maintained the subjects' indicated blood oxygen saturations equal to or in excess of their ground level (1,273 feet) baselines. With the same oxygen flow rates the prototype porous and dilution valve masks provided higher tracheal oxygen partial pressures than the open port masks at all altitudes tested during rest and exercise. The prototype phase dilution rebreather masks appear to be more efficient since at the same flow rates a greater amount of oxygen was derived from the supply and less oxygen lost to the ambient environment as compared to the open port type mask. (Author).
Publisher:
ISBN:
Category : Aerospace medicine
Languages : en
Pages : 24
Book Description
The report describes evaluation of two prototype phase dilution rebreathing masks as compared to an open port rebreathing mask design. Human subjects wearing the prototype masks and engaged in three minute periods of rest and exercise were exposed to altitudes of 14,000, 18,000, 25,000, 30,000 and 34,000 feet in an altitude chamber. Each subject was instrumented to obtain a variety of physiological parameters including end expiratory gas composition, blood oxygen saturation (ear oximetry), ECG, and respiratory rate (impedance pneumograph). Oxygen flow and system pressure as provided by an automatic constant-flow regulator were also determined. The automatic constant-flow regulator when used in conjunction with either of the prototype phase dilution rebreather test masks and proper orifices maintained the subjects' indicated blood oxygen saturations equal to or in excess of their ground level (1,273 feet) baselines. With the same oxygen flow rates the prototype porous and dilution valve masks provided higher tracheal oxygen partial pressures than the open port masks at all altitudes tested during rest and exercise. The prototype phase dilution rebreather masks appear to be more efficient since at the same flow rates a greater amount of oxygen was derived from the supply and less oxygen lost to the ambient environment as compared to the open port type mask. (Author).
Government-wide Index to Federal Research & Development Reports
Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1020
Book Description
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1020
Book Description
Scientific and Technical Aerospace Reports
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1460
Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1460
Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Technical Abstract Bulletin
Author: Defense Documentation Center (U.S.)
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 784
Book Description
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 784
Book Description
Aviation Medical Reports
Author: United States. Office of Aviation Medicine
Publisher:
ISBN:
Category : Aviation medicine
Languages : en
Pages : 506
Book Description
Publisher:
ISBN:
Category : Aviation medicine
Languages : en
Pages : 506
Book Description
Soaring
Author:
Publisher:
ISBN:
Category : Gliders
Languages : en
Pages : 652
Book Description
Publisher:
ISBN:
Category : Gliders
Languages : en
Pages : 652
Book Description
Index to FAA Office of Aviation Medicine Reports
Author: United States. Office of Aviation Medicine
Publisher:
ISBN:
Category : Aviation medicine
Languages : en
Pages : 32
Book Description
Publisher:
ISBN:
Category : Aviation medicine
Languages : en
Pages : 32
Book Description
Index to FAA Office of Aviation Medicine Reports: 1961 Through 1971
Author: United States. Office of Aviation Medicine
Publisher:
ISBN:
Category : Aviation medicine
Languages : en
Pages : 38
Book Description
An index to Office of Aviation Medicine Reports (1964 - 1971) and Civil Aeromedical Research Institute Reports (1961 - 1963) is presented as a quick reference for those engaged in aviation medicine and related activities. It provides a listing of all FAA aviation medicine reports published from 1961 through 1971 by year, number, author, subject and title. (Author).
Publisher:
ISBN:
Category : Aviation medicine
Languages : en
Pages : 38
Book Description
An index to Office of Aviation Medicine Reports (1964 - 1971) and Civil Aeromedical Research Institute Reports (1961 - 1963) is presented as a quick reference for those engaged in aviation medicine and related activities. It provides a listing of all FAA aviation medicine reports published from 1961 through 1971 by year, number, author, subject and title. (Author).
FAA-AM.
Author:
Publisher:
ISBN:
Category : Aviation medicine
Languages : en
Pages : 306
Book Description
Publisher:
ISBN:
Category : Aviation medicine
Languages : en
Pages : 306
Book Description
Monthly Catalog of United States Government Publications
Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages :
Book Description