Flow restricting intravascular devices for treating edema
AssigneeWhite Swell Medical Ltd
InventorsRonan Keating, Or Inbar, Ilan Grunberg, Sagi Raz, Gerry Mccaffrey, Eamon Brady
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Abstract
This disclosure relates to a catheter system that for precisely positioning fluid flow restrictors within a blood vessel. In particular, this disclosure provides a catheter system that includes a sheath with a first fluid flow restrictor mounted thereto, and a catheter that is slidably disposed within the sheath and has a second fluid flow restrictor mounted thereto. Inside a blood vessel, the sheath and the catheter are separately slidable, thereby allowing the first and second fluid flow restrictors to be positioned at precise locations within the blood vessel.
Claims12
A catheter system for removing excess fluid, the system comprising:
- a sheath dimensioned for insertion into a blood vessel, the sheath comprising a first selectively deployable restrictor mounted to an exterior surface of the sheath, the first selectively deployable restrictor comprising an inflated state and a collapsed state, wherein an exterior surface of the first selectively deployable restrictor comprises a membrane comprising at least one biaxial stretch region configured to be compliant in a circumferential direction, and at least one longitudinal stretch resistant strip configured to be relatively stiff in an axial direction, wherein, when in an inflated state within a blood vessel, the longitudinal stretch resistant strip defines at least one flow path configured to permit an amount of fluid flow within the blood vessel through the flow path past the first selectively deployable restrictor to maintain fluid flow in a vessel segment upstream of the first selectively deployable restrictor;
- and
- a catheter, slidably disposed within the sheath, the catheter comprising a proximal portion and a distal portion with a second selectively deployable restrictor mounted to the distal portion, wherein the distal portion of the catheter is configured to extend from a distal end of the sheath such that the second selectively deployable restrictor is downstream of the first selectively deployable restrictor inside the blood vessel, wherein the sheath and the catheter are configured to be independently moveable within the blood vessel relative to each other thereby allowing the first selectively deployable restrictor to be independently positioned at a first location inside the blood vessel by movement of the sheath and the second selectively deployable restrictor to be independently positioned at a second location inside the blood vessel by movement of the catheter through the sheath such that the first location and the second location define a precise region of low pressure for withdrawing excess fluid.
Dependencies are inferred from the claim text.