Which of the following individuals is most at-risk for developing intrinsic renal failure?
A 60-year-old male with diabetes mellitus
A 25-year-old female with a recent urinary tract infection
A 45-year-old male with a history of hypertension
A 70-year-old male who is septic
The Correct Answer is D
A. While a 60-year-old male with diabetes is at high risk for chronic kidney disease, this is a slow, progressive vascular and basement membrane issue. Intrinsic renal failure often refers to an acute insult like acute tubular necrosis. Diabetes contributes to long-term nephropathy but is not the most immediate trigger for acute intrinsic damage in this specific list.
B. A 25-year-old female with a recent urinary tract infection is primarily at risk for cystitis or, if it ascends, pyelonephritis. While severe pyelonephritis can cause renal scarring, it rarely leads to acute intrinsic renal failure in a healthy young adult. This condition is usually managed effectively with antibiotics before the renal parenchyma suffers a total functional collapse.
C. Hypertension in a 45-year-old male is a major risk factor for nephrosclerosis and chronic renal failure over several decades. However, it does not typically cause the sudden, direct parenchymal injury associated with acute intrinsic renal failure unless a hypertensive crisis occurs. Chronic hypertension leads to narrowing of the renal arteries rather than immediate tubular or interstitial necrosis.
D. A 70-year-old male who is septic is at extreme risk for intrinsic renal failure due to prolonged ischemia and cytokine-mediated damage. Sepsis causes systemic vasodilation and hypotension, leading to acute tubular necrosis, the most common form of intrinsic kidney injury. The combination of advanced age and a severe systemic inflammatory response creates a high-risk environment for organ failure.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Benign prostatic hyperplasia is primarily a condition of aging and genetic predisposition. Statistics show that 50% of men aged 51 to 60 possess histologic evidence of BPH, and having a first-degree relative with the condition significantly increases individual risk. This patient combines two primary non-modifiable risk factors for prostatic stromal and epithelial cell proliferation.
B. While some studies suggest a correlation between metabolic syndrome components like hypertension and prostate volume, it is not the primary driver of BPH. Elevated blood pressure affects vascular resistance but does not directly stimulate the androgen-dependent growth of the transition zone. Age and hormonal shifts remain much more potent predictors of prostatic enlargement than cardiovascular status.
C. A history of sexually transmitted infections is more closely associated with chronic prostatitis or urethral strictures than with the development of BPH. Prostatic hypertrophy involves non-malignant overgrowth of tissue rather than inflammatory or infectious processes. A 30-year-old male is statistically very unlikely to present with symptomatic BPH regardless of prior infection history.
D. A diet high in monounsaturated fatty acids, such as those found in olive oil, is generally considered heart-healthy and potentially protective against various inflammatory conditions. It does not act as a risk factor for the development of prostatic hyperplasia. In contrast, diets high in saturated animal fats and red meats are more frequently linked to increased prostate risks.
Correct Answer is A
Explanation
A. Heart failure patients suffer from reduced cardiac output, which directly decreases effective arterial blood volume and renal perfusion. The elderly are more susceptible due to age-related declines in the glomerular filtration rate and a diminished compensatory response. This hypoperfusion triggers prerenal azotemia as the kidneys receive insufficient blood to maintain filtration.
B. A healthy young adult maintaining normal fluid intake has stable hemodynamics and adequate renal blood flow to support metabolic demands. Their kidneys are not subjected to the pressure or volume deficits that characterize the prerenal state. Without significant dehydration or cardiac impairment, the risk for developing acute kidney injury in this population remains negligible.
C. Pregnancy typically involves a physiological increase in blood volume and cardiac output, which generally enhances renal perfusion and filtration. While complications like preeclampsia can occur, the state of pregnancy itself is not a primary risk factor for prerenal failure. Normal gestational changes facilitate improved clearance of metabolic waste products through the renal system.
D. A marathon runner in peak condition possesses an efficient cardiovascular system that maintains tissue oxygenation and adequate vascular pressures during exertion. While extreme dehydration can lead to prerenal issues, the prompt "peak physical condition" implies a balanced physiological state. They are less likely to experience the chronic perfusion deficits seen in patients with cardiac failure.
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