Certified Nephrology Nurse Certification (CNN) Practice Exam

Azotemia refers to the accumulation of nitrogenous wastes in the blood, primarily urea and creatinine, which are byproducts of protein metabolism. This condition is indicative of impaired kidney function where the kidneys are unable to effectively filter out these waste products from the bloodstream.

Understanding azotemia is crucial in nephrology as it often signals a decline in renal function and may lead to further complications if not addressed. The identification of elevated blood urea nitrogen (BUN) and serum creatinine levels is a key factor in diagnosing and monitoring kidney health.

The other options relate to different physiological states: fluid excess pertains to conditions like edema or fluid overload, low blood pressure is associated with various cardiovascular issues, and increased urine output could indicate a different set of renal conditions or reactions to certain medications or hydration levels. Each of these options reflects distinct clinical scenarios that do not describe the specific condition of azotemia.