system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Best vein for total parenteral nutrition is ?
assistant
The correct answer is  Ans. is 'a' i.e. Subclan vein The preferred site for central vein infusion is the superior vena cava & preferred access sites are subclan > jugular > femoral vein.