Table 2.
Renal arterial and venous plasma concentrations among 17 subjects undergoing heart catheterization
| Artery (Mean±SD) | Vein (Mean±SD) | P Valuea | Single-Pass Renal Elimination (%) | Urine (n=7)(Mean±SD) | ||
|---|---|---|---|---|---|---|
| Mean±SD | IQR | |||||
| Creatinine (mg/dl) | 1.10±0.4 | 0.9±0.3 | <0.001 | 22.1±7.9 | 16.8, 25.9 | 91.6±46.7 |
| Mineral metabolism markers | ||||||
| Parathyroid hormone (pg/ml) | 62.9±31.1 | 35.9±20.6 | <0.001 | 44.2±10.3 | 38.0, 50.7 | 0 |
| Fibroblast growth factor-23 (pg/mL) | 73.2±36.1 | 61.5±37.7 | 0.01 | 17.1±19.5 | 0.9, 30.0 | 15.9±15.2 |
| Phosphate (mg/dl) | 3.7±0.7 | 3.5±0.6 | 0.03 | 5.5±9.4 | 0.0, 12.8 | 45.5±26.2 |
| 1,25-dihydroxyvitamin D3 (pg/ml) | 27.7±14.0 | 27.4±14.2 | 0.85 | 1.4±22.4 | −7.7, +15.2 | 0 |
| 24,25-dihydroxyvitamin D3 (ng/ml) | 3.3±2.1 | 3.3±2.1 | 0.78 | −2.1±21.5 | −5.4, +8.5 | 0 |
| 25-hydroxyvitamin D2 (ng/ml) | 3.5±5.1 | 3.6±5.1 | 0.68 | −12.2±54.4 | −3.1, +9.2 | 0 |
| 25-hydroxyvitamin D3 (ng/ml) | 25.4±10.4 | 26.0±10.9 | 0.62 | −2.8±18.3 | −1.6, +5.3 | 0 |
| Total 25-hydroxyvitamin D (ng/ml) | 28.9±11.3 | 29.5±11.4 | 0.58 | −3.1±18.3 | −3.2, +5.0 | 0 |
a
Paired t test comparing arterial and venous concentrations.