What does external access refer to in dialysis?

External access in dialysis specifically refers to the use of a catheter. Catheters are flexible tubes that are inserted into the bloodstream to allow for the exchange of blood during hemodialysis. This method allows for quick and efficient access to the vascular system, which is crucial for dialysis treatment since it involves removing blood, filtering it, and returning it to the body.

Catheters can be used for short-term or long-term purposes, depending on the patient's needs. They are particularly useful for patients who may not have appropriate veins for a fistula or graft, as they provide immediate accessibility to a patient’s circulation.

Understanding external access is essential for managing patients undergoing dialysis, as it impacts their treatment plan, affects infection control practices, and influences overall patient outcomes.