Correlation of NIRS determined cerebral oxygenation with severity of pilot +Gz acceleration symptoms

Paul B. Benni; John K.J. Li; Bo Chen; Joseph Cammarota; David W. Amory

doi:10.1007/978-1-4615-0075-9_35

Correlation of NIRS determined cerebral oxygenation with severity of pilot +Gz acceleration symptoms

Paul B. Benni, John K.J. Li, Bo Chen, Joseph Cammarota, David W. Amory

School of Engineering, Biomedical Engineering

Rutgers, The State University

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

Pilots commonly experience decreased peripheral vision, confusion & disorientation, and/or unconsciousness when exposed to high +Gz acceleration. We correlated NIRS determined ΔHb, ΔHbO₂, and ΔTotalHb with the resultant +Gz stress symptoms that subjects reported after experiencing a 6 to 10 +Gz amplitude pulse. During the hyperemic response phase following the +Gz pulses, an increase of the averaged peak values of ΔHbO₂ and ΔTotalHb as a function of the severity of the subjects' symptoms was observed. Significant increases were found for the averaged peak values of ΔHbO₂ and ΔTotalHb between high vision loss, confusion and disorientation while remaining conscious (A-LOC), and unconsciousness (G-LOC). The results suggest that the confusion and disorientation associated with A-LOC is physiologically based and that A-LOC is an intermediate +Gz stress symptom between high peripheral vision loss and G-LOC. Like G-LOC, pilots who experience A-LOC symptoms momentarily do not have full control of their aircraft.

Original language	American English
Pages (from-to)	381-389
Number of pages	9
Journal	Advances in experimental medicine and biology
Volume	530
DOIs	https://doi.org/10.1007/978-1-4615-0075-9_35
State	Published - 2003

ASJC Scopus subject areas

General Biochemistry, Genetics and Molecular Biology

Keywords

+Gz acceleration
+Gz stress
A-LOC
Cerebral oxygenation
G-LOC (G-induced loss of consciousness)
NIRS (Near-Infrared Spectroscopy)

Access to Document

10.1007/978-1-4615-0075-9_35

Cite this

@article{154163b8c68242d29fe59982a94706a0,

title = "Correlation of NIRS determined cerebral oxygenation with severity of pilot +Gz acceleration symptoms",

abstract = "Pilots commonly experience decreased peripheral vision, confusion \& disorientation, and/or unconsciousness when exposed to high +Gz acceleration. We correlated NIRS determined ΔHb, ΔHbO2, and ΔTotalHb with the resultant +Gz stress symptoms that subjects reported after experiencing a 6 to 10 +Gz amplitude pulse. During the hyperemic response phase following the +Gz pulses, an increase of the averaged peak values of ΔHbO2 and ΔTotalHb as a function of the severity of the subjects' symptoms was observed. Significant increases were found for the averaged peak values of ΔHbO2 and ΔTotalHb between high vision loss, confusion and disorientation while remaining conscious (A-LOC), and unconsciousness (G-LOC). The results suggest that the confusion and disorientation associated with A-LOC is physiologically based and that A-LOC is an intermediate +Gz stress symptom between high peripheral vision loss and G-LOC. Like G-LOC, pilots who experience A-LOC symptoms momentarily do not have full control of their aircraft.",

keywords = "+Gz acceleration, +Gz stress, A-LOC, Cerebral oxygenation, G-LOC (G-induced loss of consciousness), NIRS (Near-Infrared Spectroscopy)",

author = "Benni, \{Paul B.\} and Li, \{John K.J.\} and Bo Chen and Joseph Cammarota and Amory, \{David W.\}",

year = "2003",

doi = "10.1007/978-1-4615-0075-9\_35",

language = "American English",

volume = "530",

pages = "381--389",

journal = "Advances in experimental medicine and biology",

issn = "0065-2598",

publisher = "Springer New York",

}

TY - JOUR

T1 - Correlation of NIRS determined cerebral oxygenation with severity of pilot +Gz acceleration symptoms

AU - Benni, Paul B.

AU - Li, John K.J.

AU - Chen, Bo

AU - Cammarota, Joseph

AU - Amory, David W.

PY - 2003

Y1 - 2003

N2 - Pilots commonly experience decreased peripheral vision, confusion & disorientation, and/or unconsciousness when exposed to high +Gz acceleration. We correlated NIRS determined ΔHb, ΔHbO2, and ΔTotalHb with the resultant +Gz stress symptoms that subjects reported after experiencing a 6 to 10 +Gz amplitude pulse. During the hyperemic response phase following the +Gz pulses, an increase of the averaged peak values of ΔHbO2 and ΔTotalHb as a function of the severity of the subjects' symptoms was observed. Significant increases were found for the averaged peak values of ΔHbO2 and ΔTotalHb between high vision loss, confusion and disorientation while remaining conscious (A-LOC), and unconsciousness (G-LOC). The results suggest that the confusion and disorientation associated with A-LOC is physiologically based and that A-LOC is an intermediate +Gz stress symptom between high peripheral vision loss and G-LOC. Like G-LOC, pilots who experience A-LOC symptoms momentarily do not have full control of their aircraft.

AB - Pilots commonly experience decreased peripheral vision, confusion & disorientation, and/or unconsciousness when exposed to high +Gz acceleration. We correlated NIRS determined ΔHb, ΔHbO2, and ΔTotalHb with the resultant +Gz stress symptoms that subjects reported after experiencing a 6 to 10 +Gz amplitude pulse. During the hyperemic response phase following the +Gz pulses, an increase of the averaged peak values of ΔHbO2 and ΔTotalHb as a function of the severity of the subjects' symptoms was observed. Significant increases were found for the averaged peak values of ΔHbO2 and ΔTotalHb between high vision loss, confusion and disorientation while remaining conscious (A-LOC), and unconsciousness (G-LOC). The results suggest that the confusion and disorientation associated with A-LOC is physiologically based and that A-LOC is an intermediate +Gz stress symptom between high peripheral vision loss and G-LOC. Like G-LOC, pilots who experience A-LOC symptoms momentarily do not have full control of their aircraft.

KW - +Gz acceleration

KW - +Gz stress

KW - A-LOC

KW - Cerebral oxygenation

KW - G-LOC (G-induced loss of consciousness)

KW - NIRS (Near-Infrared Spectroscopy)

UR - https://www.scopus.com/pages/publications/0242362066

UR - https://www.scopus.com/inward/citedby.url?scp=0242362066&partnerID=8YFLogxK

U2 - 10.1007/978-1-4615-0075-9_35

DO - 10.1007/978-1-4615-0075-9_35

M3 - Article

C2 - 14562733

SN - 0065-2598

VL - 530

SP - 381

EP - 389

JO - Advances in experimental medicine and biology

JF - Advances in experimental medicine and biology

ER -

Correlation of NIRS determined cerebral oxygenation with severity of pilot +Gz acceleration symptoms

Abstract

ASJC Scopus subject areas

Keywords

Access to Document

Other files and links

Fingerprint

Cite this