1 325

Cited 4 times in

Ultrasonographic finding of internal jugular vein during anti-G straining maneuver: is it associated with gravity-induced loss of consciousness?

Authors
 Hyun Seok Choi  ;  Jin Gon Sul  ;  Kyung Sik Yi  ;  Jeong-Min Seo  ;  Ki Young Chung 
Citation
 EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY, Vol.109(4) : 625-630, 2010 
Journal Title
 EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY 
ISSN
 1439-6319 
Issue Date
2010
MeSH
Adult ; Aviation ; Centrifugation ; Cerebrovascular Circulation ; Gravity, Altered* ; Humans ; Jugular Veins/diagnostic imaging* ; Jugular Veins/physiopathology ; Logistic Models ; Male ; Republic of Korea ; Respiratory Mechanics* ; Risk Assessment ; Risk Factors ; Ultrasonography ; Unconsciousness/diagnostic imaging ; Unconsciousness/etiology* ; Unconsciousness/physiopathology ; Vascular Resistance ; Young Adult
Abstract
Gravity-induced loss of consciousness (G-LOC) is caused by loss of cerebral blood flow during high +Gz (head-to-foot inertial forces). The resistance of the jugular vein is a significant factor in decrease in cerebral blood flow. Ultrasonography of thoracic inlet veins, including internal jugular vein, is feasible to visualize the internal jugular vein and hemodynamic information. Anti-gravity straining maneuver (AGSM) was widely recognized as one of the important factors in preventing G-LOC. The purpose of this study was to evaluate the relationship between the ultrasonographic shape and size of internal jugular vein during AGSM and G-LOC. 47 trainee pilots who participated in human centrifuge education program were enrolled. They were all men, and their mean age was 23.9 +/- 1.38 years. Questionnaire sheets were used to collect information about well-being sensation, smoking, drinking, height, and weight. Using ultrasonography, we monitored shape and size of internal jugular vein during AGSM. After ultrasonographic examination, 47 subjects underwent human centrifuge on the same day. The protocol of human centrifuge training was maximal 6G with sustaining time of 30 s. G-LOC occurred to ten out of 47 subjects in human centrifuge. To find presumptive variable associated with G-LOC, we performed logistic regression analysis. Concave contour and smaller cross-sectional area of internal jugular vein during AGSM were associated with G-LOC.
Full Text
http://link.springer.com/article/10.1007%2Fs00421-010-1401-2
DOI
10.1007/s00421-010-1401-2
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Radiology (영상의학교실) > 1. Journal Papers
Yonsei Authors
Choi, Hyun Seok(최현석) ORCID logo https://orcid.org/0000-0003-4999-8513
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/102626
사서에게 알리기
  feedback

qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse

Links