Pediatric CCRN Exam Study Guide Questions with Complete Solutions 2025

Pediatric CCRN Exam Study Guide Questions with Complete Solutions 2025 SIADH Labs/Diagnostics - Correct Answer -Hyponatremia (yet euvolemic) Na<135 -Decreased serum osmolality (<280) -Increased serum urine osmolality (>100) -Urine sodium >20 -Renal, cardiac, thyroid function normal - Spec grav INCREASED DI labs - Correct Answer *urine chemistry*: -think *DILUTE* >>decreased spec gravity (<1.005) >>decreased urine osmolality >>decreased urine pH, Na, and K *Serum chemistry* -think *CONCENTRATED* >>increased serum osmolality (>300m/Osm/L) >>increased serum Na and K *Radioimmunassay*: decreased ADH SIADH causes - Correct Answer TBI, HIE, Injury to hypothalamus or post pituitary SIADH Patho - Correct Answer excess ADH= fluid retention, decrased serum osm(low solute to H2O ratio), dilutional hyponatremia (a fast drop leads to neuro change) SIADH tx - Correct Answer Fluid restriction, IV hypertonic saline SLOWLY to prevent central pontine myelinolysis, conivaptan/tolvaptan, *demeclocycline* Stop cyclophosphamide