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Oxygen Tension Changes in the Outer Vascular Wall Supplied by Vasa vasorum following Adenosine and Epinephrine
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Abstract
We measured blood vessel wall oxygen tension (PO2) in vivo in the tissue and on the surface of dog thoracic aortas and femoral arteries. The overall mean tissue PO<sub>2</sub> in the outer vascular wall supplied by vasa vasorum for both blood vessels was 49.4 ± 2.6 (SE) Torr for 42 sites in 8 dogs. Changes in PO<sub>2</sub> were measured after intravenous injections of adenosine and epinephrine. There was some tendency for the PO<sub>2</sub> to decrease with epinephrine for both vessels. With adenosine the thoracic aorta wall tissue PO2 increased significantly (+23.2 ± 6.0 Torr, p < 0.025), while the femoral artery did not. One possible interpretation of these results is that the vasa vasorum of the thoracic aorta are capable of changing blood flow and oxygen supply to the outer wall to a greater degree than the femoral artery.
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158621 Blood Vessels 1986;23:9–21Copyright: All rights reserved. No part of this publication may be translated into other languages, reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording, microcopying, or by any information storage and retrieval system, without permission in writing from the publisher. Drug Dosage: The authors and the publisher have exerted every effort to ensure that drug selection and dosage set forth in this text are in accord with current recommendations and practice at the time of publication. However, in view of ongoing research, changes in government regulations, and the constant flow of information relating to drug therapy and drug reactions, the reader is urged to check the package insert for each drug for any changes in indications and dosage and for added warnings and precautions. This is particularly important when the recommended agent is a new and/or infrequently employed drug. Disclaimer: The statements, opinions and data contained in this publication are solely those of the individual authors and contributors and not of the publishers and the editor(s). The appearance of advertisements or/and product references in the publication is not a warranty, endorsement, or approval of the products or services advertised or of their effectiveness, quality or safety. The publisher and the editor(s) disclaim responsibility for any injury to persons or property resulting from any ideas, methods, instructions or products referred to in the content or advertisements.