Abstract
The regional distribution of ventilation to perfusion ratios (VA/Q) in the lungs of 8 healthy standing Thoroughbred geldings (4.4 +/- 1.5 years, 465.7 +/- 46.6 kg) was studied, using steady-state inhalation and IV infusion of the radioactive gas krypton-81m. The VA/Q was uniformly distributed within a vertical lung strip centered over the 9th rib on the right side. Ventilation per unit of alveolar volume (V/VA) assessed from the clearance of inhaled radioactive gas in 5 horses increased from 0.49 +/- 0.13 (arbitrary units) in nondependent lung zones to 1.45 +/- 0.16 in dependent lung zones. Seemingly, a vertical gradient of pulmonary ventilation exists in the horse that is matched by a similar gradient of perfusion.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1597-1601 |
| Number of pages | 5 |
| Journal | American Journal of Veterinary Research |
| Volume | 45 |
| Issue number | 8 |
| State | Published - Aug 1 1984 |
| Externally published | Yes |
ASJC Scopus subject areas
- veterinary(all)