Article (Scientific journals)
Permeability of the Endothelium and Partitioning of the Pulmonary Blood Flow Resistance in Isolated Perfused Pig Lungs: Effects of Breed and Age
Gustin, Pascal; Urbain, B.; Delaunois, Annie et al.
1992In Veterinary Research Communications, 16 (1), p. 69-82
Peer Reviewed verified by ORBi
 

Files


Full Text
GustinP_VetResCommun_1992.pdf
Publisher postprint (807.1 kB)
Request a copy

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
lungs; pigs
Abstract :
[en] The right and left lungs of 5 healthy Minipigs and of 13 healthy Landrace piglets were isolated, perfused at constant pressure and maintained in an isogravimetric state under zone III conditions (pulmonary venous pressure greater than alveolar pressure). By applying the double, arterial and venous, occlusion technique, the total blood flow resistance (R) was partitioned into four components: arterial (Ra), pre- (Ra') and post-capillary (Rv') and venous (Rv). The capillary filtration coefficient (Kf,c) was evaluated by measuring the weight gained by the lungs when the arterial and venous pressures were suddenly increased. In the youngest Landrace piglets (5 weeks old), there was an uncontrolled vasoconstriction which sometimes prevented perfusion of the lungs and induced a large increase in Rt. These high values of Rt were decreased by tolazoline administration. The values of Rt recorded in older pigs (12-13 weeks old) were lower in Minipigs (33.66 +/- 3.77 cmH2O min L-1 per 100 g of lungs; n = 5) than in Landrace piglets (55.20 +/- 6.18 cmH2O min L-1 per 100 g; n = 5). This breed difference was due to the differences in Ra' and Rv'. The mean values of Kf,c were 0.193 +/- 0.015 and 0.202 +/- 0.029 ml min (cmH2O)-1 per 100 g of the lungs in Minipigs and Landrace piglets respectively. All these parameters were stable for the 3 hours following the equilibrium period. It was concluded that: (1) There is an age-related maturation of the control of the vasomotor tone in porcine lungs. (2) Pulmonary microvascular haemodynamics are influenced by the breed of the pigs. (3) There was no difference in the Kf,c values between both the breeds. (4) A comparison of the values reported for dogs and rabbits with our data shows that the pre- and post-capillary resistances and, to a lesser extent, the arterial and venous resistances are relatively high in pigs
Disciplines :
Veterinary medicine & animal health
Author, co-author :
Gustin, Pascal ;  Université de Liège - ULiège > Département de sciences fonctionnelles > Pharmacologie, pharmacothérapie et toxicologie
Urbain, B.
Delaunois, Annie ;  Université de Liège - ULiège
Zeimes, K.
Ansay, Michel ;  Université de Liège - ULiège
Language :
English
Title :
Permeability of the Endothelium and Partitioning of the Pulmonary Blood Flow Resistance in Isolated Perfused Pig Lungs: Effects of Breed and Age
Publication date :
1992
Journal title :
Veterinary Research Communications
ISSN :
0165-7380
Publisher :
Kluwer Academic Publishers, Dordrecht, Netherlands
Volume :
16
Issue :
1
Pages :
69-82
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 25 August 2009

Statistics


Number of views
47 (4 by ULiège)
Number of downloads
3 (3 by ULiège)

Scopus citations®
 
15
Scopus citations®
without self-citations
6
OpenCitations
 
11

Bibliography


Similar publications



Contact ORBi