An important coordinate causing renal calculi is?

HPSSC - 2015

Medical Surgical Nursing

Easy

Appeared in: HPSSC - 2015

Explanation

Hyperparathyroidism is a condition where the parathyroid glands produce too much parathyroid hormone (PTH).
Excess PTH causes high levels of calcium in the blood (hypercalcemia) by taking it from the bones and increasing its absorption from the gut.
The kidneys try to get rid of the extra calcium, leading to high levels of calcium in the urine (hypercalciuria).
This high concentration of calcium in the urine can cause calcium to form solid crystals, which develop into kidney stones (renal calculi).
Kidney stones are a classic complication of hyperparathyroidism, affecting a significant number of patients with the condition.

Option A: Hypertension is generally a result of kidney damage, not a primary cause of the metabolic imbalance that forms stones. While it can worsen kidney function, it doesn't directly lead to hypercalciuria.
Option B: Renal tumors are a structural, not metabolic, cause. They can block urine flow, causing stasis, which can lead to stone formation, but they do not cause the underlying high calcium levels seen in hyperparathyroidism.
Option C: Nephrotic syndrome is characterized by massive protein loss in the urine, low albumin in the blood, and edema. Its pathophysiology is unrelated to the calcium and mineral imbalances that cause the most common types of kidney stones.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Etiology of Renal Calculi (Kidney Stones) as background academic context rather than a clinical decision trigger.
Nurses should recognize that patients with recurrent calcium-based kidney stones may have an undiagnosed endocrine disorder like primary hyperparathyroidism and may require a referral for further evaluation.
Patient education is a key nursing role, involving teaching about the importance of high fluid intake (at least 2-3 liters/day) to dilute urine and prevent stone formation.
Monitoring for signs of renal colic (severe flank pain, hematuria, nausea/vomiting) is crucial in patients with a history of stones or hyperparathyroidism.

How to Approach the Question

First, understand the question is asking for a significant cause ('important coordinate') of renal calculi (kidney stones).
Evaluate each option's physiological effect on the body and its potential to form stones.
Recall that the most common kidney stones are made of calcium.
Analyze Option D, Hyperparathyroidism. Remember that parathyroid hormone (PTH) controls calcium levels. Excess PTH leads to high blood and urine calcium, a direct cause of calcium stones.
Analyze the other options. Hypertension (A) is more of a result of kidney disease. Renal tumors (B) can cause obstruction but aren't a primary metabolic cause. Nephrotic syndrome (C) involves protein loss, not mineral excess leading to stones.
Conclude that hyperparathyroidism provides the most direct and significant metabolic pathway for the formation of renal calculi among the choices.

Concept Tested & Keywords

Q4fiVDJCZ9_1rbL9Q4VuoG

E6 Medicine Davidson Principles Practice 24e p. 682-684

E6 Nursing Brunner Adult Health 3SA Vol 1 Part 4 p. 28-30

E6 Pathology- ROBBINS & COTRAN PATHOLOGIC BASIS OF DISEASE 10TH Ed p. 947-949