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US 9,066,726 B2Granted
Multi-electrode apposition judgment using pressure elements
AssigneeMedtronic Ardian Luxembourg S.a.r.l.
InventorNishant R. Srivastava
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Abstract
Apparatus and methods for determining positioning of a energy delivery element include deploying a energy delivery element at a treatment site proximal to a vessel wall; using a multi-region pressure sensing apparatus to sense pressures applied in a plurality of directions about the energy delivery element; and determining an orientation of the energy delivery element based on the pressures measured in the plurality of directions about the energy delivery element.
Claims9
A system, comprising:
- an intravascular catheter comprising an elongated shaft having a proximal portion and a distal portion configured for intravascular insertion into a body lumen of a human patient;
- a therapeutic assembly carried by the distal portion of the shaft, the therapeutic assembly including—
- an energy delivery element configured to deliver energy to modulate nerves associated with sympathetic neural function;
- a cylindrical capacitive sensor configured to measure contact force against a wall of the body lumen, the sensor being disposed at or proximate to the energy delivery element, the cylindrical capacitive sensor having a plurality of regions that are circumferentially separated by one or more non-conductive areas;
- and
- a controller operably connected to the energy delivery element and the cylindrical capacitive sensor, the controller configured to—
- obtain a plurality of contact force measurements corresponding individually to the plurality of regions;
- and
- determine an orientation of the energy delivery element relative to the wall of the body lumen based on at least one of the plurality of contact force measurements.
6 more elements
Dependencies are inferred from the claim text.