Correct Answer: D

Rationale: Using clean gloves rather than sterile gloves for colostomy care is a cost-effective measure without compromising care quality. This choice helps in reducing costs without compromising patient safety. Storing opened bottles of normal saline in a refrigerator for up to 48 hours (Choice A) may lead to contamination risks. Returning unused supplies to the unit's supply stock (Choice B) can be inefficient and lead to potential waste. Waiting to dispose of sharps containers until they are completely full (Choice C) may pose safety hazards and not directly impact cost savings.

Correct Answer: A

Rationale: Prolonged bed rest can lead to hypocalcemia due to decreased mobility and bone resorption. In this scenario, the low serum calcium level of 4.0 mg/dL is likely a result of decreased bone activity and calcium release due to prolonged bed rest. Renal insufficiency would more likely lead to hypercalcemia due to impaired excretion of calcium by the kidneys. Hyperparathyroidism is characterized by increased calcium levels as a result of excess parathyroid hormone. Excessive ingestion of vitamin D can cause hypercalcemia by increasing intestinal absorption of calcium.

Correct Answer: B

Rationale: The correct answer is B: Preventive care. Primary healthcare emphasizes preventive care, which includes promoting overall health, preventing diseases, and providing early intervention to avoid the progression of illnesses. Emergency care (choice A) is focused on immediate medical attention for urgent health situations but is not the primary focus of primary healthcare. Specialized treatment (choice C) refers to care provided by specialists for specific health conditions, which is not the main focus of primary healthcare. Hospital-based services (choice D) involve inpatient care provided in a hospital setting, which is not the primary focus of primary healthcare that aims to provide comprehensive and accessible care at the community level.

Correct Answer: C

Rationale: The correct answer is C. Veracity is the principle of truthfulness, not treating all patients equally. Choice A is correct as Justice involves being honest and fair. Choice B is correct as Beneficence is about doing good. Choice D is correct as Self-determination is about respecting and facilitating patient choices.

Correct Answer: B

Rationale: Rotating injection sites when administering insulin helps prevent insulin lipodystrophy, which is the abnormal distribution of fat at injection sites. Insulin edema (choice A) is not prevented by rotating injection sites; it is characterized by swelling at the site of insulin injection due to increased capillary permeability. Insulin resistance (choice C) is a condition where the body's cells become less responsive to insulin, and rotating injection sites does not directly prevent this. Systemic allergic reactions (choice D) are not specifically prevented by rotating injection sites; they are related to an allergic response to insulin.