RELATIONSHIP OF PORTAL BLOOD FLOW TO METABOLIZABLE ENERGY INTAKE OF CATTLE

1984 ◽  
Vol 64 (5) ◽  
pp. 16-17 ◽  
Author(s):  
G. HUNTINGTON

Blood flow through portal-drained viscera (PBF) was related to metabolizable energy intake (MEI) in six Hereford × Angus heifers (41 observations), three nonlactating Holstein cows (four observations) and four lactating Holstein cows (14 observations). The linear equation (R2 = 0.75, Sy.x = 55) was PBF (L/h) = 352 + 5.8 ± 0.5 (MEI, MJ/day). Key words: Cattle, portal blood flow, energy intake

1973 ◽  
Vol 23 (4) ◽  
pp. 575-578 ◽  
Author(s):  
Takashi OCHIAI ◽  
Taku NAGAO ◽  
Sakae MURATA ◽  
Kenichi YOSHIMOTO ◽  
Yoshio KOWA

1994 ◽  
Vol 72 (6) ◽  
pp. 687-692
Author(s):  
Andrés C. Inglés ◽  
Dallas J. Legare ◽  
W. Wayne Lautt

Complete shunting of portal blood flow through portacaval shunts was obtained using a constrictor around the portal vein to gradually produce a total occlusion. After 4 weeks, acute experiments were conducted in anesthetized cats. Blood from the femoral artery was shunted through a pump to supply and control the entire portal blood flow. As shunted portal blood flow was varied over a wide range, the portal shunt resistance showed distensibility. Decreasing portal venous pressure from 15.0 ± 0.9 to 11.1 ± 0.6 mmHg (1 mmHg = 133.3 Pa) resulted in elevations of resistance of 58%. The relation between the resistance (R) and the distending pressure (Pd) was a constant, the index of contractility (IC), where IC = R∙Pd3. In steady state, the IC was 485 ± 55 mmHg4∙mL−1∙min∙kg and did not change passively in response to changes in portal blood flow. In conclusion, portacaval shunts are passively distensible, and resistance is altered as a cubic function of the distending pressure. Because resistance is altered both actively and passively, the IC should prove useful to differentiate these alternatives for evaluation of changes in portal hypertensive therapy.Key words: portacaval shunts, distensibility model, vascular resistance, index of contractility.


1973 ◽  
Vol 23 (4) ◽  
pp. 575-578
Author(s):  
Takashi OCHIAI ◽  
Taku NAGAO ◽  
Sakae MURATA ◽  
Kenichi YOSHIMOTO ◽  
Yoshio KOWA

1975 ◽  
Vol 41 (2) ◽  
pp. 596-600 ◽  
Author(s):  
L. R. Prewitt ◽  
D. R. Jacobson ◽  
R. W. Hemken ◽  
R. H. Hatton

1970 ◽  
Vol 172 (2) ◽  
pp. 284-290 ◽  
Author(s):  
DENIS F. J. HALMAGYI ◽  
ANTHONY H. GOODMAN ◽  
MILES J. LITTLE ◽  
MERRILYN KENNEDY ◽  
DESMOND VARGA

Surgery Today ◽  
1994 ◽  
Vol 24 (7) ◽  
pp. 621-626 ◽  
Author(s):  
Kazuhiro Tsukada ◽  
Takeo Sakaguchi ◽  
Takemi Tomiyama ◽  
Katsuyuki Uchida ◽  
Yoshinobu Sato ◽  
...  

Surgery ◽  
1997 ◽  
Vol 121 (1) ◽  
pp. 95-101 ◽  
Author(s):  
Alexander S Rosemurgy ◽  
James G Norman ◽  
Sarah E Goode

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