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The protection against +Gz afforded by pressure breathing with different pressure schedules.
Space Med Med Eng (Beijing). 2000 Jun; 13(3):166-70.SM

Abstract

OBJECTIVE

System of pressure breathing for +Gz (PBG) has been incorporated into service in the high performance fighter aircraft, but there were significant differences among PBG pressure schedules used in different countries. The purpose of this study was to define an optimal pressure schedule in PBG system.

METHOD

Five male subjects wearing GZ-2 anti-G suit and medium-sized bladder vest, plus PBG with 1.6, 2.4, and 3.2 kPa/G pressure schedules, respectively, were exposed to rapid onset (3.0 G/s) centrifuge +Gz runs. +Gz protection of PBG with each of the three pressure schedules were measured and the subjective ratings were collected.

RESULT

The +Gz protection afforded by PBG with 1.60, 2.40, and 3.20 kPa/G pressure schedules were 2.00 +/- 0.31, 2.54 +/- 0.32, and 2.44 +/- 0.31 G, respectively. Subjective ratings showed that the PBG with 2.40 kPa/G pressure schedule was better than the other two.

CONCLUSION

Our data suggest that a PBG pressure schedule of 2.4 kPa/G in PBG system is optimal. It not only assures the anti-G performance of PBG, but also reduces its side effects.

Authors+Show Affiliations

Geng XC
Institute of Aviation Medicine, Air Force of China, Beijing.
Zhan CL
No affiliation info available
Yan GD
No affiliation info available
Chu X
No affiliation info available
Lu X
No affiliation info available

MeSH

AccelerationAdolescentAdultAerospace MedicineAviationDecompression SicknessGravity SuitsHeart RateHumansHypergravityMalePositive-Pressure Respiration

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

11543476

Citation

Geng, X C., et al. "The Protection Against +Gz Afforded By Pressure Breathing With Different Pressure Schedules." Hang Tian Yi Xue Yu Yi Xue Gong Cheng = Space Medicine & Medical Engineering, vol. 13, no. 3, 2000, pp. 166-70.
Geng XC, Zhan CL, Yan GD, et al. The protection against +Gz afforded by pressure breathing with different pressure schedules. Space Med Med Eng (Beijing). 2000;13(3):166-70.
Geng, X. C., Zhan, C. L., Yan, G. D., Chu, X., & Lu, X. (2000). The protection against +Gz afforded by pressure breathing with different pressure schedules. Hang Tian Yi Xue Yu Yi Xue Gong Cheng = Space Medicine & Medical Engineering, 13(3), 166-70.
Geng XC, et al. The Protection Against +Gz Afforded By Pressure Breathing With Different Pressure Schedules. Space Med Med Eng (Beijing). 2000;13(3):166-70. PubMed PMID: 11543476.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The protection against +Gz afforded by pressure breathing with different pressure schedules. AU - Geng,X C, AU - Zhan,C L, AU - Yan,G D, AU - Chu,X, AU - Lu,X, PY - 2001/9/7/pubmed PY - 2001/9/11/medline PY - 2001/9/7/entrez SP - 166 EP - 70 JF - Hang tian yi xue yu yi xue gong cheng = Space medicine & medical engineering JO - Space Med Med Eng (Beijing) VL - 13 IS - 3 N2 - OBJECTIVE: System of pressure breathing for +Gz (PBG) has been incorporated into service in the high performance fighter aircraft, but there were significant differences among PBG pressure schedules used in different countries. The purpose of this study was to define an optimal pressure schedule in PBG system. METHOD: Five male subjects wearing GZ-2 anti-G suit and medium-sized bladder vest, plus PBG with 1.6, 2.4, and 3.2 kPa/G pressure schedules, respectively, were exposed to rapid onset (3.0 G/s) centrifuge +Gz runs. +Gz protection of PBG with each of the three pressure schedules were measured and the subjective ratings were collected. RESULT: The +Gz protection afforded by PBG with 1.60, 2.40, and 3.20 kPa/G pressure schedules were 2.00 +/- 0.31, 2.54 +/- 0.32, and 2.44 +/- 0.31 G, respectively. Subjective ratings showed that the PBG with 2.40 kPa/G pressure schedule was better than the other two. CONCLUSION: Our data suggest that a PBG pressure schedule of 2.4 kPa/G in PBG system is optimal. It not only assures the anti-G performance of PBG, but also reduces its side effects. SN - 1002-0837 UR - https://www.unboundmedicine.com/medline/citation/11543476/The_protection_against_+Gz_afforded_by_pressure_breathing_with_different_pressure_schedules_ DB - PRIME DP - Unbound Medicine ER -