CCRN Renal Exam 2 with Questions and Answers

CCRN Renal Exam 2 with Questions and Answers A 24-year-old man has been diagnosed with acute kidney injury as a result of severe hemorrhaging after a motor vehicle collision. Which of the following would be expected laboratory values for this patient? A. Low urinary osmolality, high urinary sodium concentration B. High urinary osmolality, high urinary sodium concentration C. Low urinary osmolality, low urinary sodium concentration D. High urinary osmolality, low urinary sodium concentration ANSWER D A high urinary osmolality (usually greater than 900 mOsm/kg) and a low urinary sodium concentration (usually less than 20 mEq/L) are normal physiologic responses to hypoperfusion in patients with normal kidneys. Test Taking Tip Consider that the kidney would want to conserve sodium and water with blood loss. If the kidney is holding onto sodium, little is excreted into the urine, so urinary sodium is low. If the kidney is holding onto water, little is excreted into the urine, so it is concentrated and