Which of the following is preferred cannulation site for total parenteral nutrition: September 2007
**Core Concept**
The preferred cannulation site for total parenteral nutrition (TPN) is a crucial aspect of ensuring the safe and effective delivery of nutrients. The optimal site should have a low risk of complications, such as infection, thrombosis, or mechanical issues.
**Why the Correct Answer is Right**
The correct answer is the subclavian vein. This is because the subclavian vein is a large, superficial vein with a low risk of thrombosis and a wide diameter, making it ideal for cannulation. Additionally, the subclavian vein is relatively close to the heart, which reduces the risk of venous stasis and thrombosis. The subclavian vein is also less likely to be compressed by surrounding structures, making it a more reliable choice for TPN.
**Why Each Wrong Option is Incorrect**
**Option A:** The jugular vein is a possible site for cannulation, but it is not the preferred site due to its smaller diameter and higher risk of thrombosis. The jugular vein is also more prone to compression by surrounding structures.
**Option B:** The femoral vein is a common site for cannulation, but it is not the preferred site for TPN due to its higher risk of infection and thrombosis. The femoral vein is also more prone to compression by surrounding structures.
**Option C:** The internal jugular vein is a possible site for cannulation, but it is not the preferred site due to its smaller diameter and higher risk of thrombosis. The internal jugular vein is also more prone to compression by surrounding structures.
**Clinical Pearl / High-Yield Fact**
The subclavian vein is the preferred site for cannulation due to its wide diameter and low risk of complications. It is essential to use a sterile technique and to select a site with minimal risk of compression or thrombosis.
**Correct Answer:** C. Subclavian vein