What refers to elevations in nitrogenous wastes (BUN, creatinine)?

Appeared in: NVS Staff Nurse - 2022

Explanation

Azotemia is the correct medical term for a biochemical abnormality characterized by the elevation of nitrogenous waste products, namely blood urea nitrogen (BUN) and creatinine, in the bloodstream.
This condition is primarily caused by a decreased glomerular filtration rate (GFR), which signifies impaired kidney function.
The other options listed are either causes of a specific type of azotemia or a form of treatment, not the condition itself.

Option A: A diuretic is a medication or substance that promotes increased urine production (diuresis). It is used to treat conditions like hypertension and edema by reducing fluid volume, not a term for waste product accumulation.
Option B: Hemorrhage refers to severe blood loss. While significant hemorrhage can lead to decreased blood flow to the kidneys (hypoperfusion) and cause prerenal azotemia, it is a cause, not the definition of elevated nitrogenous wastes.
Option D: Hypovolemia is a state of decreased blood volume in the body. Similar to hemorrhage, it is a common cause of prerenal azotemia due to reduced kidney perfusion, but it is not the term for the waste buildup itself.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Definition of Azotemia as background academic context rather than a clinical decision trigger.
Nurses are responsible for monitoring renal function through laboratory tests like BUN and creatinine, as well as tracking urine output. Recognizing azotemia is crucial for early detection of kidney dysfunction.
Identifying the type of azotemia is key to treatment. For prerenal azotemia, nursing interventions focus on restoring fluid volume and blood pressure. For postrenal azotemia, the focus is on relieving the obstruction.
Patient education is vital. Nurses must teach patients with chronic kidney disease about dietary restrictions (e.g., protein, sodium, potassium) to manage azotemia and slow disease progression.

How to Approach the Question

First, analyze the question to identify the core concept. The question asks for the specific term that describes 'elevations in nitrogenous wastes (BUN, creatinine)'.
This is a definition-based or factual recall question. Your goal is to match the definition with the correct medical term.
Evaluate each option:
Diuretic: Recall that this is a type of drug.
Hemorrhage: Recall that this means bleeding.
Azotemia: Recall or deduce that 'azo' relates to nitrogen.

Concept Tested & Keywords

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E6 Pathology- ROBBINS & COTRAN PATHOLOGIC BASIS OF DISEASE 10TH Ed p. 896-898

E6 Medicine Harrison 22e Part 2 p. 283-285

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