**Core Concept**
The shunt procedure for portal hypertension aims to divert blood flow from the portal vein to the systemic circulation, reducing portal pressure and its complications. The choice of shunt procedure depends on the patient's risk profile, liver function, and the presence of varices or ascites.

**Why the Correct Answer is Right**
The correct shunt procedure for a patient with portal hypertension and acceptable operative risk is the **Mesocaval H-graft shunt**. This shunt involves the creation of a shunt between the superior mesenteric vein and the inferior vena cava, using a graft to reduce the risk of thrombosis. The Mesocaval H-graft shunt is preferred because it provides a controlled flow of blood from the portal system to the systemic circulation, reducing portal pressure and its complications. This shunt is also reversible, allowing for the potential restoration of portal flow in the future.

**Why Each Wrong Option is Incorrect**
* **Option A:** The **Distal splenorenal shunt** is a good option for patients with portal hypertension and significant splenomegaly, but it may not be the best choice for patients with a high risk of bleeding from esophageal varices.
* **Option B:** The **Portocaval shunt** is a more aggressive procedure that involves a direct anastomosis between the portal vein and the inferior vena cava, which may not be suitable for patients with adequate liver function.
* **Option C:** The **Side-to-side portacaval shunt** is a good option for patients with portal hypertension and significant ascites, but it may not be the best choice for patients with a high risk of bleeding from esophageal varices.

**Clinical Pearl / High-Yield Fact**
When choosing a shunt procedure for portal hypertension, it is essential to consider the patient's risk profile, liver function, and the presence of varices or ascites. A Mesocaval H-graft shunt may be a good option for patients with acceptable operative risk and adequate liver function, as it provides a controlled flow of blood from the portal system to the systemic circulation, reducing portal pressure and its complications.

**Correct Answer:** C.