Table 1.

Baseline values of RPP, RBF, and regional LDSa

ParameterControlNormoxiaControlHyperoxiaControlHypoxia
aCortical blood flow is estimated as LDS 2 mm below renal capsule. Outer medullary blood flow estimates are obtained in 4-mm depth. RPP, renal perfusion pressure; RBF, renal blood flow; LDS, laser-Doppler signal; ΔR CLDS and ΔR MLDS, percent changes in vascular resistance for the cortex and outer medulla, respectively.
RPP (mmHg)110 ± 4110 ± 4109 ± 4111 ± 4111 ± 4.499 ± 3*
RBF (ml/min)5.9 ± 0.55.8 ± 0.65.1 ± 0.65.1 ± 0.65.7 ± 0.76.6 ± 0.6*
Cortical LDS (AU)301 ± 18302 ± 18301 ± 21301 ± 22302 ± 19314 ± 8*
Medullary LDS (AU)77 ± 1177 ± 1376 ± 1277 ± 1177 ± 13109 ± 14*
ΔR RBF (%)100 ± 2101 ± 170 ± 4*
ΔR CLDS (%)108 ± 7104 ± 583 ± 8*
ΔR MLDS (%)100 ± 2104 ± 470 ± 9*