Patent ID: 11890044
Assignee: ST. JUDE MEDICAL, CARDIOLOGY DIVISION, INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 11:
12. 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.