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US 11,890,044 B2Granted
Pulmonary vein isolation balloon catheter
AssigneeSt. Jude Medical, Cardiology Division, Inc.
InventorsTroy T. Tegg, Salo Arias, Derek Sutermeister
Life of this patent
Estimating the term…
Abstract
The instant disclosure relates to electrophysiology catheters for tissue ablation. In particular, the instant disclosure relates to a cryogenic ablation balloon with safety features that facilitate identification of a leak into an interstitial space between inner and outer balloons as part of the ablation balloon catheter assembly, and prevents egress of cryogenic fluid out of the ablation balloon.
Claims19
An ablation catheter system comprising:
- a catheter shaft including proximal and distal ends;
- a dual cryogenic ablation balloon coupled to the distal end of the catheter shaft, the dual cryogenic ablation balloon including an inner and an outer balloon;
- an interstitial space between the inner and outer balloons configured and arranged to capture cryogenic fluid that escapes from an internal cavity of the inner balloon;
- a manifold configured and arranged to deliver cryogenic fluid to the internal cavity of the inner balloon;
- a first and second lumen in fluid communication with the interstitial space;
- and
- an adaptor that mechanically couples the inner and outer balloons to the catheter shaft, and radially and longitudinally offsets proximal portions of the inner and outer balloons, wherein the adaptor is circumferentially positioned within the catheter shaft;
- and
- a spacer coupled between proximal portions of the inner and outer balloons, at least a portion of the spacer surrounding the adapter.
6 more elements
A dual-layer ablation balloon comprising:
- an inner balloon including an internal cavity configured and arranged to receive a cryogenic fluid in a liquid state and to facilitate a state transfer of the cryogenic into a gaseous state;
- an outer balloon that encapsulates the inner balloon;
- an interstitial space between the inner and outer balloons;
- and
- an exhaust lumen in fluid communication with the internal cavity of the inner balloon, the exhaust lumen configured to exhaust the gaseous state cryogenic fluid out of the internal cavity, wherein at least a portion of the length of the exhaust lumen has a clover-leaf-like cross-sectional area;
- and
- a spacer coupled between proximal portions of the inner and outer balloons, at least a portion of the spacer surrounding an adapter that mechanically couples the inner and outer balloons to a catheter shaft.
4 more elements
A dual-layer ablation balloon comprising:
- an inner balloon including an internal cavity configured and arranged to receive a cryogenic fluid in a liquid state and to facilitate a state transfer of the cryogenic into a gaseous state;
- an outer balloon that encapsulates the inner balloon;
- an interstitial space between the inner and outer balloons;
- an adaptor that mechanically couples the inner and outer balloons to a catheter shaft, and radially and longitudinally offsets proximal portions of the inner and outer balloons, wherein the adaptor is configured to be circumferentially positioned within a catheter shaft;
- and
- a spacer coupled between proximal portions of the inner and outer balloons, at least a portion of the spacer surrounding the adapter.
3 more elements
Dependencies are inferred from the claim text.