Table 2.

Mean urine volume, osmolality, and solute excretion (24 hours) during phase I and phase II

Urine Phase ICVUrine Phase IICVUrine Phase (II − I)/I × 100P valuea
V (L)1.57 ± 0.7526%2.35 ± 1.0620%50.0%0.015
Uosm (mosm/kg)496 ± 17217%325 ± 11112%−34.5%0.015
UosmV (mosmol)673 ± 20716%689 ± 23919%2.4%0.847
UNaV (mEq)132 ± 4130%136 ± 7926%3.0%0.878
UKV (meq)42 ± 1116%48 ± 1520%14.3%0.191
UClV (meq)127 ± 621%120 ± 6121%−5.5%0.736
UUrea (mmol)131.7 ± 40.015%138.3 ± 38.318%5.1%0.656
UCreatinine (gm)1.20 ± 0.215%1.20 ± 0.214%0.0%0.908
  • Data expressed as mean ± SD. n = 8.

  • a Comparison between Urine Phase I and Urine Phase II.