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Table 1 Serum sodium (Na) concentration, serum osmolality (Osm), serum AVP, and urine osmolality from initial evaluation at 2.5 months to 3 years of age

From: Persistent elevation of urine aquaporin-2 during water loading in a child with nephrogenic syndrome of inappropriate antidiuresis (NSIAD) caused by a R137L mutation in the V2 vasopressin receptor

Age Events Serum Na
(134-143
mmol/L)
Serum Osm
(285-293
mOsm/kg)
Serum AVP
(1.0-13.3
pg/mL)
Urine Osm
(300-900
mOsm/kg)
2.5 m Initial presentation 118 247 < 1 390
5.5 m After 1 month of water restriction and urea 142 295 5.5 n/a*
3 yr Off urea for > 6 months; ad lib intake 139 295 3.1 628
  1. *n/a = not available