special cannula
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Retina ◽  
2013 ◽  
Vol 33 (6) ◽  
pp. 1279-1280
Author(s):  
Anderson Teixeira ◽  
Antonio Marcelo Barbante Casella ◽  
Cesar Bernilla ◽  
Fernando Jopetibe ◽  
Milton Yogi ◽  
...  

1986 ◽  
Vol 64 (11) ◽  
pp. 1434-1439 ◽  
Author(s):  
Stephanie W. Y. Ma ◽  
Brita E. NaDeau ◽  
David O. Foster

Lack of an adequate method for sampling venous blood from the brown adipose tissue (BAT) of conscious animals has impeded study of the in vivo metabolism of this tissue during physiological activation of its thermogenic function. This paper describes a technique for cannulating the main vein (Sulzer's) of the interscapular BAT (IBAT) of rats in a manner that does not impair blood flow and allows multiple venous sampling over several hours in conscious animals. The technique was tested over the widest possible range of IBAT blood flows by applying it to measurements of IBAT arteriovenous O2 differences in barbital-anesthetized, cold-acclimated rats infused with vehicle or with various doses of noradrenaline. Comparison was made with controls in which samples of IBAT venous blood were obtained by cutting Sulzer's vein. Blood flow was measured by the microsphere method. These tests showed that the presence of the special cannula in Sulzer's vein had no significant effect on the blood flow, arteriovenous O2 difference, or O2 consumption of the IBAT at any level of noradrenaline-induced thermogenesis. The new technique will permit examination of the functioning of BAT in nonshivering thermogenesis and diet-induced thermogenesis under much more physiological conditions than hitherto possible. It should also significantly reduce the number of animals required for such studies.


1984 ◽  
Vol 64 (5) ◽  
pp. 116-117 ◽  
Author(s):  
K. ROHR ◽  
M. BRANDT ◽  
P. LEBZIEN ◽  
H. SCHAFFT

Duodenal flow as derived from total collection and spot sampling was compared in three Friesian cows, using a re-entrant cannula without transecting the intestine. Cr2O3 was used as a single marker. Small differences in flow of dry matter, organic matter and nitrogen indicate that the spot sampling procedure may render valid results. The mean recovery of Cr2O3 was 96.7%. Key words: Cattle, duodenal flow, sampling technique, marker


1981 ◽  
Vol 241 (2) ◽  
pp. H279-H282 ◽  
Author(s):  
O. S. Randall ◽  
N. Westerhof ◽  
G. C. Van den Bos ◽  
P. Sipkema

Chronic complete heart block was produced in 38 closed-chest anesthetized dogs with a special cannula introduced via a jugular vein. A Formalin mixture (0.2-1.0 ml, consisting of equal amounts of 40% Formalin and radiopaque material) was injected through this cannula into the His bundle, which was located with a His-bundle catheter. The entire procedure took approximately 30 min and was successful in 90% of the cases.


1967 ◽  
Vol 28 (5) ◽  
pp. 943-948 ◽  
Author(s):  
Peter Safar ◽  
Jean Penninckn

Science ◽  
1951 ◽  
Vol 113 (2936) ◽  
pp. 385-386 ◽  
Author(s):  
R. W. Eckstein ◽  
J. A. McEachen ◽  
J. Demming ◽  
W. B. Newberry

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