Which type of bone fracture is likely to take the longest to heal?

Choice A reason: Avoiding pain medication may increase discomfort, reducing mobility and increasing complications like atelectasis. Opioids can cause constipation, but this is managed with stool softeners, not avoidance. This statement is inaccurate, as pain control is essential for recovery and does not directly support wound healing.

Choice B reason: Excessive rest increases risks like venous thromboembolism or pneumonia, especially in obese patients. Early ambulation promotes circulation and wound healing without straining incisions if done cautiously. This statement is inaccurate, as limiting movement excessively hinders recovery and increases postoperative complications.

Choice C reason: Returning to normal activity too soon risks incision dehiscence or infection, particularly in obese patients with higher wound complication rates. Gradual activity increase under medical guidance is needed. This statement is inaccurate, as premature activity resumption can compromise healing and safety post-surgery.

Choice D reason: Adequate nutrition, especially high-protein intake, supports collagen synthesis and tissue repair, critical for wound healing. Obesity increases metabolic demand, and protein prevents malnutrition, enhancing immune response and incision strength. This statement is accurate, as nutrition is a priority to optimize postoperative recovery and prevent complications.

Reasoning:

Choice A reason: Levothyroxine (T4) replacement requires TSH monitoring to ensure adequate dosing, as TSH reflects thyroid function. T3 replacement also requires monitoring, but T3 is less commonly used due to its short half-life. This statement is inaccurate, as TSH monitoring is essential for T4 therapy.

Choice B reason: The body converts levothyroxine (T4) to triiodothyronine (T3) via deiodinase enzymes in peripheral tissues, restoring both hormone levels. T3 replacement is unnecessary, as T4 provides a stable precursor for T3 production, making this statement accurate for explaining hypothyroidism treatment rationale.

Choice C reason: T3 and T4 can be administered together in specific cases (e.g., combination therapy) without becoming inactive. However, T4 alone is standard due to its longer half-life and conversion to T3. This statement is inaccurate, as it falsely claims biochemical incompatibility between the hormones.

Choice D reason: T3 is the active thyroid hormone, not an inactive precursor to T4. T4 is converted to T3, which binds receptors to regulate metabolism. This statement is inaccurate, as it reverses the roles of T3 and T4 in thyroid hormone physiology and therapy.