Table 2.
Water loading test in patient 1 after ECV repletion
| Time, min | Urine Volume, ml | Uosm, mosm/kg water | Posm, mosm/kg water | Cosm, mosm/kg water | CH2O, ml/min | TCH2O, ml/min |
|---|---|---|---|---|---|---|
| 0 | 570 | 272 | ||||
| 45 | 75 | 323 | 1.98 | — | 0.31 | |
| 90 | 350 | 150 | 4.29 | 3.49 | ||
| 150 | 450 | 131 | 3.61 | 3.89 | ||
| 210 | 145 | 179 | 1.59 | 0.83 | ||
| 240 | 75 | 192 | 1.78 | 0.72 |
The patient ingested 20 ml/kg water, 1500 ml, in 30 min. He excreted 1240 ml of urine in 4 h or 82.7% of the 1500 ml water ingested at time 0, normal >80%. Note: the lowest Uosm of 131 mosm/kg at 150 min is higher than would be expected in a normal subject and is consistent with a free-water clearing defect that is characteristic of RSW.