**4. Thrombolysis/Infusion catheters**

These catheters systems are the original type for thrombolysis. The Uni fuse is a single catheter system with multiple side holes throughout its infusion length. (Fig 1) They infuse drug directly into the clot and allow the drug to act directly on the thrombus intraluminally. The catheters come in various sizes and lengths. The speed lyser catheter is unique short device with only 15 and 20cm lengths. This device is designed to be used during fistulalysis procedures for dialysis patients. Both catheter systems are excellent for clot dissolution due to their ease of use and ability to use any drug combination.
