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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Unilateral hypoxic pulmonary vasoconstriction in the dog, pony and miniature swine.

The hypoxic pulmonary vasoconstrictor response to unilateral hypoxia was analyzed in pentobarbital anesthetized dogs (n = 5), miniature swine (n = 5), and ponies (n = 5). The left and right lungs (LL, RL) were separately ventilated with the LL exposed to inspired oxygen concentrations (CIO2) of 100%, 12%, 8% or 4%, while the RL always received a CIO2 = 100%. Pulmonary blood flow distribution was measured using 15 microns radioactive microspheres. LL PAO2, and percent pulmonary blood flow diversion (%FD) were calculated at each CIO2. At CIO2 of 4% there were significant differences (P greater than or equal to 0.05) between the %FD responses of each species (mean +/- S.E.): the %FDswine (95.1 +/- 1.3) greater than %FDpony (76.0 +/- 4.6) greater than %FDdog (50.1 +/- 9.4). For all species, the %FD was inversely related to the level of regional hypoxia, but there were marked species differences in the magnitude and sensitivity of hypoxic pulmonary vasoconstriction with the swine being the strongest responder, the pony intermediate, and the dog the weakest responder.[1]

References

  1. Unilateral hypoxic pulmonary vasoconstriction in the dog, pony and miniature swine. Elliott, A.R., Steffey, E.P., Jarvis, K.A., Marshall, B.E. Respiration physiology. (1991) [Pubmed]
 
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