**Core Concept**
Liver function and portal hypertension are closely related. In the context of portal hypertension, various surgical and interventional procedures are used to reduce pressure and prevent complications. The impact of these procedures on liver function is a critical consideration.

**Why the Correct Answer is Right**
Sclerotherapy is a minimally invasive procedure used to treat esophageal varices by injecting a sclerosing agent into the varices. This procedure does not directly affect liver function or portal pressure, making it a relatively liver-friendly option. In contrast, other procedures like shunts and TIPSS (Transjugular Intrahepatic Portosystemic Shunt) can alter portal flow and potentially compromise liver function.

**Why Each Wrong Option is Incorrect**
**Option A:** Non-selective shunts divert blood from the portal vein directly into the systemic circulation, bypassing the liver. This can lead to hepatic encephalopathy, a condition where the liver is unable to clear toxins from the blood.

**Option B:** TIPSS creates a shunt within the liver, which can lead to portal hypertension and compromise liver function over time. The procedure can also cause hepatic encephalopathy and other complications.

**Option C:** Distal splenorenal shunt is a type of selective shunt that directs blood from the spleen to the left renal vein. While it may be less harmful than non-selective shunts, it can still cause portal hypertension and affect liver function.

**Clinical Pearl / High-Yield Fact**
When treating portal hypertension, it's essential to balance the need to reduce pressure with the risk of compromising liver function. This is particularly important in patients with cirrhosis or other liver diseases.

**Correct Answer Line**
✓ Correct Answer: D. Sclerotherapy.