J. Anim Sci.
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J. Anim Sci. 1981. 52:101-107.
© 1981 American Society of Animal Science
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A Technique for Monitoring Nutrient Absorption in the Conscious, Unrestrained Pig1,2,3,

N. L. Bajjalieh4, A. H. Jensen5, G. R. Frank5 and D. E. Brown5

University of Illinois, Urbana 61801

Abstract

A surgical preparation allowing for the determination of apparent absorption in the conscious, unrestrained pig is described. The technique allows the collection of blood from the hepatic portal vein and vena cava, as well as the simultaneous determination of rate of flow through the portal vessel. A chronic electromagnetic blood flow probe is placed around, and a mechanical, hydraulically activated sampling needle attached to, the hepatic portal vein. An indwelling catheter is placed within the vena cava. By simultaneously determining nutrient concentration of hepatic portal and vena cava blood and then multiplying their difference by the rate of blood flow through the hepatic portal vein, one can make a point-in-time estimate of apparent absorption from the gastrointestinal tract.

Footnotes

1 This research was supported in part by funds from the Illinois Exp. Sta.

2 Representing part of a thesis submitted by the senior author in partial fulfillment of the requirements for a Ph.D. degree.

3 The authors express appreciation to Dr. Pamela A. Anderson for preparing the pouches. They also gratefully acknowledge the assistance of Dr. A. Dare McGilliard in obtaining the HSN's used and his advice concerning this application.

4 Present address: Dale Alley Co., 222 Sylvanie St., St. Joseph, MO 64501.

5 Dept. of Anim. Sci.






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Copyright © 1981 by the American Society of Animal Science.