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Hemodialysis requires access to blood vessels capable of providing rapid extracorporeal blood flow. Acute hemodialysis access should be easy to insert, available for immediate use, and trouble-free in the short-term.
Two currently available classes of device best meet these criteria:
The basic aspects of these catheters and the potential complications that can occur will be reviewed here. The catheters used for chronic vascular access are discussed separately. (See "Chronic hemodialysis vascular access: Types and placement".)
Double-lumen, non-cuffed, non-tunneled hemodialysis catheters have become the preferred method for obtaining acute hemodialysis vascular access [1,2]. They are available from many manufacturers and are composed of many different plastics. The current polymers are rigid at room temperature to facilitate insertion but soften at body temperature to minimize vessel trauma and blood vessel laceration. The proximal and distal lumens should be separated by at least 2 cm to minimize recirculation. The continuous blood path made possible by the dual lumen design allows rapid blood flows and the use of a no heparin hemodialysis technique. (See "Hemodialysis anticoagulation".) These catheters come in a series of internal configurations including double D, Coaxial, and shotgun.
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