<s>[INST] WHAT IS A VASCULAR ACCESS? [/INST] For hemodialysis it is necessary to create a vascular access or pathway to your blood. The access is usually created in your arm during a short surgery. One type of access is a fistula, another type of access is a graft. In some cases an external catheter may be inserted into a vein in your chest or neck. A catheter is usually temporary and replaced by a fistula or graft. Source: COLUMBUS REGIONAL HEALTH. Link: https://www.crh.org/physician-practices/columbus-regional-health-nephrology-hypertension/faq-about-kidney-disease#:~:text=CKD%20is%20chronic%20kidney%20disease,family%20history%20of%20kidney%20disease.. Field: Nephrology. Disease: Kidney Disease </s>