caa a22 4500 397569297 CHVBK 20180308164836.0 cr unu---uuuuu 161202e199610 xx s 000 0 eng 10.3382/ps.0751261 doi (NATIONALLICENCE)oxford-10.3382/ps.0751261 Blood Viscosity in Broilers: Influence on Pulmonary Hypertension Syndrome [Elektronische Daten] [M. R. FEDDE, R. F. WIDEMAN] Elevation in apparent blood viscosity may enhance the pulmonary hypertension that leads to pulmonary hypertension syndrome (PHS) and 1ascites in fast-growing broilers. We investigated the importance of packed cell volume (PCV) and shear rate in modifying apparent viscosity of the blood from broilers assigned to normal, preascites, and ascites groups. Apparent viscosity of broiler blood increased at all shear rates as PCV increased; the increase in apparent viscosity became greater as the shear rate decreased at PCV above 0.30. At the PCV of normal broilers (0.30 or below), apparent viscosity was nearly shear rate independent, at least down to 11.25 per second, the lowest shear rate studied. Apparent viscosity, at any given PCV and shear rate, was significantly lower in the blood of birds with ascites than in normal birds; however, the relative viscosity was not different between those groups, indicating that lower plasma viscosity in the birds with PHS was responsible for the finding. The results show that the principal factor responsible for increased apparent viscosity of blood in birds with PHS is the increase in PCV. The increased resistance to flow of blood as the result of higher blood viscosity may contribute to the pulmonary hypertension. © 1996 Poultry Science Association, Inc. Physiology and Reproduction nationallicence pulmonary hypertension syndrome nationallicence viscosity nationallicence plasma nationallicence shear rate nationallicence packed cell volume nationallicence FEDDE M. R. Department of Anatomy and Physiology, Veterinary Medical Sciences Building, Kansas State University, Manhattan, Kansas 66506-5602 and aut WIDEMAN R. F. Department of Poultry Science, University of Arkansas, Fayetteville, Arkansas 72701 aut Poultry Science Oxford University Press 75/10(1996-10), 1261-1267 0032-5791 75:10<1261 1996 75 ps https://doi.org/10.3382/ps.0751261 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.3382/ps.0751261 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- FEDDE M. R. Department of Anatomy and Physiology, Veterinary Medical Sciences Building, Kansas State University, Manhattan, Kansas 66506-5602 and aut NATIONALLICENCE 700 1- WIDEMAN R. F. Department of Poultry Science, University of Arkansas, Fayetteville, Arkansas 72701 aut NATIONALLICENCE 773 0- Poultry Science Oxford University Press 75/10(1996-10), 1261-1267 0032-5791 75:10<1261 1996 75 ps Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford