## **Core Concept**
The question tests knowledge of complications following Transurethral Resection of the Prostate (TURP), a surgical procedure commonly performed for Benign Prostatic Hyperplasia (BPH). TURP syndrome is a well-known complication, especially in elderly patients. It involves a spectrum of symptoms including altered mental status, seizures, and cardiovascular instability.

## **Why the Correct Answer is Right**
TURP syndrome is primarily caused by the absorption of the irrigating fluid used during the procedure, which is typically a hypotonic, non-electrolytic solution (e.g., glycine or sorbitol). This absorption leads to hyponatremia and fluid overload. The altered sensorium or confusion can result from cerebral edema due to the hypo-osmolar state. The correct answer, **. TURP syndrome**, is right because it directly relates to the complications arising from the procedure, particularly the absorption of irrigating fluid leading to hyponatremia and cerebral edema.

## **Why Each Wrong Option is Incorrect**
- **Option A:** Hypovolemia is not directly related to the altered sensorium post-TURP. While fluid shifts can occur, the primary issue in TURP syndrome is fluid overload and hyponatremia, not hypovolemia.
- **Option B:** Sepsis could cause altered sensorium but is not the most direct or common cause related specifically to TURP and the use of irrigating fluids.
- **Option C:** Anesthetic complications could indeed cause altered sensorium but are not specific to the scenario described, which points towards a complication directly related to the TURP procedure itself.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that TURP syndrome is a critical complication that can occur during or after TURP, especially with prolonged procedures or large glands. Monitoring serum sodium levels during and after the procedure is crucial, and the use of isotonic irrigating solutions or bipolar TURP with isotonic saline can reduce the risk.

## **Correct Answer: D. TURP syndrome**