spacer gif spacer gif spacer gif spacer gif spacer gif
QUICK SEARCH:   [advanced]


spacer gif
     Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents    

This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Ishimatsu, A.
Right arrow Articles by Heisler, N.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Ishimatsu, A.
Right arrow Articles by Heisler, N.

Journal of Experimental Biology, Vol 137, Issue 1 75-88, Copyright © 1988 by Company of Biologists

JOURNAL ARTICLES

In vivo analysis of partitioning of cardiac output between systemic and central venous sinus circuits in rainbow trout: a new approach using chronic cannulation of the branchial vein

A Ishimatsu, GK Iwama and N Heisler
Abteilung Physiologie, Max-Planck-Institut fur experimentelle Medizin, Gottingen, FRG.

Freshwater-acclimated rainbow trout were chronically and non-occlusively cannulated in the dorsal aorta (DA), sinus venosus (SV) and branchial vein (BV), the latter returning the blood perfusing the central venous sinus (CVS) of the gill after being shunted away from the systemic circuit. After recovery, blood samples from these three sites were analysed for haematocrit (Hct) and [Hb]. Branchial venous blood was found to have considerably lower Hct and [Hb] (Hct = 3.5 +/- 3.1%; [Hb] = 1.04 +/- 0.75 g 100 ml-1) than systemic blood (DA: Hct = 24.3 +/- 8.9%, [Hb] = 6.54 +/- 2.90 g 100 ml-1; SV: Hct = 23.1 +/- 8.8%, [Hb] = 6.15 +/- 2.55 g 100 ml-1; means +/- S.D. N = 8), which strongly suggests that plasma skimming occurred at arteriovenous anastomoses and arterioles draining into the CVS. The partitioning of cardiac output, calculated on the basis of the [Hb] data, showed that the systemic flow accounted for 93 +/- 4.6% (N = 7) of the total cardiac output with only 7 +/- 4.7% of cardiac output being diverted into the CVS, thus bypassing the systemic vasculature. Previous results using in vitro experiments are compared with the present data in an evaluation of the usefulness of the isolated perfused gill and head preparations in the experimental analysis of circulatory physiology in fish gills.


This article has been cited by other articles:


Home page
 J. Exp. Biol.Home page
W. Waser and N. Heisler
Oxygen delivery to the fish eye: Root effect as crucial factor for elevated retinal PO2
J. Exp. Biol., November 1, 2005; 208(21): 4035 - 4047.
[Abstract] [Full Text] [PDF]

Home page
 Physiol. Rev.Home page
D. H. Evans, P. M. Piermarini, and K. P. Choe
The Multifunctional Fish Gill: Dominant Site of Gas Exchange, Osmoregulation, Acid-Base Regulation, and Excretion of Nitrogenous Waste
Physiol Rev, January 1, 2005; 85(1): 97 - 177.
[Abstract] [Full Text] [PDF]

Home page
 J. Exp. Biol.Home page
K.-O. Stenslokken, L. Sundin, G. M. C. Renshaw, and G. E. Nilsson
Adenosinergic and cholinergic control mechanisms during hypoxia in the epaulette shark (Hemiscyllium ocellatum), with emphasis on branchial circulation
J. Exp. Biol., December 1, 2004; 207(25): 4451 - 4461.
[Abstract] [Full Text] [PDF]


© The Company of Biologists Ltd 1988