A pregnant client with hyperemesis gravidarum is admitted to the hospital. Which of the following lab results would the nurse expect for this client?
1. Urine osmolality of 41 mOsm/kg; urine specific gravity of 1.038; serum osmolality of 300 mOsm/kg
2. Urine osmolality of 1210 mOsm/kg; urine specific gravity of 1.00; serum osmolality of 283 mOsm/kg
3. Urine osmolality of 1000 mOsm/kg; urine specific gravity of 1.03; serum osmolality of 290 mOsm/kg
4. Urine osmolality of 1100 mOsm/kg; urine specific gravity of 1.01; serum osmolality of 286 mOsm/kg
Urine osmolality of 41 mOsm/kg; urine specific gravity of 1.038; serum osmolality of 300 mOsm/kg
Rationale: The client with hyperemesis gravidarum is at risk for dehydration. The nurse can expect that the client will have lab results that are abnormal and reflect greater water concentration and lower solutes, such as urine osmolality of 41 mOsm/kg; urine specific gravity of 1.038; serum osmolality of 300 mOsm/kg. When the urine osmolality is high and the urine specific gravity is low, such as urine osmolality of 1210 mOsm/kg; urine specific gravity of 1.00; serum osmolality of 283 mOsm/kg, the client is overhydrated. The lab results are within normal limits in the other answer choices.
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