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Effect of the Trendelenburg position on the distribution of arterial air emboli in dogsThe effect of Trendelenburg position (TP) on the distribution of arterial air emboli in dogs was examined in a two-part investigation. In the first part, the effects of the bubble size and the vessel angle on the bubble velocity and the direction of flow were investigated in vitro, using a simulated carotid artery preparation. It was found that larger bubbles increased in velocity in the same direction as the blood flow at 0-, 10-, and 30-deg vessel angles, and decreased when the vessel was positioned at 90 deg. Smaller bubbles did not change velocity from 0 to 30 deg, but acted to increase the velocity, in the same direction as the flood flow, at 90 deg. The second series of experiments examined the effect of 0 to 30 deg TP on carotid-artery distribution of gas bubbles injected into the left ventricle or ascending aorta of anesthetized dogs. It was found that, regardless of the degree of the TP, the bubbles passed into the carotid artery simultaneously with the passage into the abdominal aorta. It is concluded that the TP does not prevent arterial bubbles from reaching the brain.
Document ID
19890027150
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Butler, Bruce D.
(Texas, University Houston, United States)
Laine, Glen A.
(Texas Univ. Houston, TX, United States)
Leiman, Basil C.
(Texas Univ. Houston, TX, United States)
Warters, Dave
(Texas Univ. Houston, TX, United States)
Kurusz, Mark
(Texas, University Houston and Galveston, United States)
Date Acquired
August 14, 2013
Publication Date
February 1, 1988
Publication Information
Publication: Annals of Thoracic Surgery
Volume: 45
ISSN: 0003-4975
Subject Category
Life Sciences (General)
Accession Number
89A14521
Funding Number(s)
CONTRACT_GRANT: NAG9-215
CONTRACT_GRANT: NIH-HL-36115
Distribution Limits
Public
Copyright
Other

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