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US 2019/0336732 A1Published application
Methods and devices for treatment of stenosis of arteriovenous fistula shunts
AssigneeRa Medical Systems, Inc.
InventorsJames B. LAUDENSLAGER, Dean S. IRWIN
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Abstract
Devices and methods are discussed directed to the use of a low profile laser ablation catheter for use in laser ablation removal of arterial plaque blockages to restore blood flow in the treatment of arteriovenous fistulas. Also discussed are devices and methods directed to packaging, long term storage and sterilization of liquid core ablation catheters.
Claims5
A method of treating a blockage in a vessel of a patient, comprising:
- emitting pulsed ultraviolet laser ablation energy from a XeCl excimer laser at a nominal output wavelength of about 308 nm and a repetition rate of less than about 100 Hz into an input end of an ablation catheter;
- transmitting the pulsed ultraviolet laser ablation energy through the ablation catheter to an active emitting surface comprising at least about 50 percent of an area of a distal end of the ablation catheter;
- and
- axially advancing and guiding a distal end of the ablation catheter through the blockage while emitting the pulsed ultraviolet laser ablation energy from the active emitting surface of the distal end of the ablation catheter while ablating and debulking the blockage by photodissociation thereof.
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Dependencies are inferred from the claim text.