Patent ID: 11918757
Assignee: W.L. GORE & ASSOCIATES GMBH
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A method of delivering a fluid to a treatment site, the method comprising:
translating a catheter assembly to the treatment site, the catheter assembly including an elongate member having a first fluid channel and a length, a sheath selectively attached to the elongate member, wherein the sheath is attached circumferentially to the elongated element at a location distal to at least one macroscopic sheath aperture, wherein the sheath is attached circumferentially to another portion of the catheter assembly at an opposing end of the sheath;
delivering a fluid through a fluid delivery port into a plurality of localized sheath pockets defined along the elongate member between the sheath and the elongate member such that the sheath transitions from a first, relaxed configuration to a second, pressurized configuration in which the sheath expands circumferentially from the elongate member to define a continuous second fluid channel between the fluid delivery port and the at least one macroscopic sheath aperture;
wherein translating the catheter assembly to the treatment site includes, inserting the catheter assembly into the vasculature of a patient and a liver parenchymal tract between a portal vein and a hepatic vein with the at least one macroscopic sheath aperture being located in the hepatic vein and a catheter assembly distal end is located in the portal vein; and
delivering a first fluid from the first channel and a second fluid from the second channel to the hepatic vein and the portal vein, the first and second fluids are delivered to the hepatic vein and the portal vein at the same time.