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      Digital Artery Blood Flow and Digital Pad Opacity during Vasoconstriction

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          Abstract

          Digital artery blood flows were compared with digital pad opacity pulse amplitudes in dogs during vasoconstrictor responses. A high correlation between digital artery flow and opacity pulse amplitudes occurred during infusions of epinephrine and sciatic and tibial nerve stimulations, but not during superficial fibular nerve stimulation. The results confirmed earlier findings that tibial nerve stimulation produced predominantly precapillary constriction, and that superficial fibular nerve stimulation produced predominantly postcapillary constriction. Events in precapillary vessels appeared to be responsible for the opacity pulse. This fact probably forms the basis for the close relationship between opacity pulse amplitude and blood flow.

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          Author and article information

          Journal
          JVR
          J Vasc Res
          10.1159/issn.1018-1172
          Journal of Vascular Research
          S. Karger AG
          1018-1172
          1423-0135
          1976
          1976
          18 September 2008
          : 13
          : 1-2
          : 58-69
          Affiliations
          Department of Physiology, College of Medicine, University of South Florida, Tampa, Fla.
          Article
          158079 Blood Vessels 1976;13:58–69
          10.1159/000158079
          © 1976 S. Karger AG, Basel

          Copyright: 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.

          Page count
          Pages: 12
          Categories
          Research Paper

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