Hypocalcemia in immediate post – , op period following excision of parathyroid adenoma is due to
**Core Concept**
Hypocalcemia in the immediate postoperative period following excision of a parathyroid adenoma is a common complication. This occurs due to the transient removal of calcium regulatory mechanisms, leading to a decrease in serum calcium levels.
**Why the Correct Answer is Right**
The correct answer is related to the transient removal of the parathyroid glands' ability to regulate calcium levels. The parathyroid glands play a crucial role in maintaining calcium homeostasis by secreting parathyroid hormone (PTH). PTH acts on the bones, kidneys, and intestines to increase calcium levels in the blood. When parathyroid adenomas are removed, the body's ability to regulate calcium levels is temporarily impaired, leading to hypocalcemia.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is not relevant to the scenario described. The removal of a parathyroid adenoma does not typically affect magnesium levels directly.
* **Option B:** This option is incorrect because the removal of a parathyroid adenoma does not typically cause hypercalcemia in the immediate postoperative period. Instead, hypocalcemia is more common due to the transient removal of the parathyroid glands' ability to regulate calcium levels.
* **Option C:** This option is not relevant to the scenario described. The removal of a parathyroid adenoma does not typically affect vitamin D levels directly.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that hypocalcemia following parathyroid surgery is often due to the transient removal of the parathyroid glands' ability to regulate calcium levels. This is why patients are often given calcium supplements and vitamin D during the postoperative period to help maintain normal calcium levels.
**Correct Answer: B. Hypoparathyroidism**