| 摘要 |
A hemodialysis catheter having a concentric outer lumen for inflow and a concentric inner lumen for outflow is disclosed. The hemodialysis catheter is used in conjunction with an adapter and with flexible extenders as a catheter assembly. The adapter has channels into which the concentric lumens extend and sealingly divides the lumens into a non-concentric branched arrangement. The flexible extenders couple to the branched lumens or to the adapter and may be doubled over and fastened in grooves in the adapter to stop fluid flow through the catheter. The flexible extenders preferably terminate in coupling mechanisms such as luer slips or luer locks. The catheter is provided with a soft atraumatic tip which has radial holes and a distal hole coupled to the inner lumen of the catheter. The outer lumen which terminates proximally of the tip also has radial holes. The catheter is preferably provided with a porous biocompatible and biostable polyurethane mesh along a portion of its outer surface which is intended to be in contact with the skin of the patient. The mesh may be sputter coated or impregnated with a bactericide.
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