Approach to hyponatremia (pediatrics) Quiz: Ace Your Exams
Get ready to dominate your medical and nursing exams by using our dynamic quizzes to elevate your knowledge and increase your confidence. Whether you're gearing up for the USMLE®, COMLEX®, or your next in-class assessment, Osmosis quizzes tackle key topics in pathology, diagnostics, and treatment approaches. By honing in on clinical readiness and decision-making, we make sure the knowledge you gain empowers you both in the classroom and in real-world practice. Jump in and supercharge your exam prep!
Learning videos
Flashcards
Expert reviewed
Spaced Repetition
Mobile app
Custom Quizzes
1 of 4
A 14-year-old girl presents is brought to the clinic by her parents who have noticed excessive drinking of water and an increased frequency of urination for 2 months. Symptoms started gradually but have progressively worsened. There is no history of edema, polyphagia, fever, head trauma, chronic cough, recent weight gain or loss, or seizures prior to onset of symptoms. She uses lithium for treatment of bipolar disorder. Past surgical and family history are non-contributory. Temperature is 37°C (98.6°F), pulse is 100/min, respirations are 20/min, and blood pressure is 100/65 mm Hg. Physical exam reveals moist mucous membranes and capillary refill is 2 seconds. Cardiopulmonary exam is normal. Abdomen is soft and non-tender with no hepatomegaly. Lab results are shown below. Which of the following should be done next to confirm the diagnosis?
| Laboratory Value | Result | Reference Range |
| Serum sodium | 149 mEq/L | 136-145 mEq/L |
| Serum Potassium | 3.5 mEq/L | 3.85.4 mEq/L |
| Serum Calcium | 9.2 mg/dL | 8.5-10.6 mg/dL |
| Serum Osmolality | 370 mOsm/kg | 275-296 mOsm/kg |
| Blood urea nitrogen (BUN) | 15 mg/dL | 7-18 mg/dL |
| Creatinine | 0.5 mg/dL | 0.3-0.8 mg/dL |
| Random blood glucose | 74 mg/dL | 70-106 mg/dL |
| Urine specific gravity | 1005 | 1003-1.035 |
| Urine Osmolality | 100 mOsm/kg | 50-1,500 mOsm/kg |
Elimination tool
0 XP
Press space to continue