Catheter system with balloon-operated filter sheath and fluid flow maintenance
AssigneeMedrad, Inc.
InventorMichael J. Bonnette
Life of this patent
Estimating the term…
Abstract
A catheter system includes an inflatable structural balloon and collapsible filter. The collapsible filter is deployable into an expanded configuration using the inflatable distal balloon. In the expanded configuration, one or more flow cells are formed between inflated portions of the balloon to provide continuous fluid flow between proximal and distal ends of the structural balloon. In the expanded configuration, the filter is configured to prevent particulates (e.g., dislodged thrombus, or other particulate material) from migrating beyond the filter. In the expanded configuration, the inflated structural balloon biases a perimeter of the filter toward or against a subject vessel wall.
Claims21
A catheter system with inflatable balloon and collapsible filter, the catheter system comprising:
- a catheter tube having a proximal portion and a distal portion;
- an inflatable structural balloon, coupled to the catheter tube near the distal portion;
- and
- a filter sheath coupled to the structural balloon, the filter sheath having a collapsed configuration and an expanded configuration, wherein:
- in the collapsed configuration, the filter sheath is collapsed around the catheter tube, and
- in the expanded configuration, the filter sheath is expanded according to inflation of the structural balloon, and the structural balloon includes one or more inflated portions, wherein one or more flow cells extend along the one or more inflated portions and are configured to provide continuous fluid communication between proximal and distal ends of the structural balloon.
A catheter system with a collapsible distal filter, the catheter system comprising:
- a catheter tube having a proximal portion and a distal portion;
- an inflatable structural balloon, coupled to the catheter tube near the distal portion;
- one or more longitudinal fluid passages that extend along the structural balloon and are at least partially bounded by the structural balloon;
- and
- a filter sheath deployable according to inflation of the structural balloon, the filter sheath encapsulating an end of the one or more passages such that particulate matter carried by fluid along the one or more passages is captured within the passages between the structural balloon and the filter sheath.
A method for deploying a filter near a distal portion of a catheter assembly in a subject vessel, the method comprising:
- inserting a distal portion of a catheter assembly into a subject vessel;
- inflating at least first and second portions of a structural balloon near a distal portion of a catheter tube of the catheter assembly, the structural balloon coupled to the catheter tube, inflating including extending the at least first and second portions away from the catheter tube in different directions to form one or more flow cells therebetween, wherein the first and second portions extend between proximal and distal ends of the structural balloon, and the one or more flow cells extend between the first and second portions to provide fluid flow through the subject vessel between the proximal and distal ends of the structural balloon;
- expanding a filter sheath with inflating of the first and second portions of the structural balloon, the filter sheath coupled to an outer edge of the first and second portions of the structural balloon and coupled to one or more of the catheter tube or to a portion of the structural balloon near the catheter tube, the expanding including the filter sheath assuming a shape based on a balloon perimeter formed by the outer edge of the first and second portions of the structural balloon;
- and
- capturing particulate matter received by at least one of the one or more flow cells through vascular fluid flow using the filter sheath.
Dependencies are inferred from the claim text.