Sensors for prosthetic heart devices
Prosthetic heart devices may be implanted into the heart with a sensor coupled to the device, the sensor being configured to measure physiological data, such as blood pressure, in the heart. Devices that may employ such sensors include prosthetic heart valves and occlusion devices, although sensor systems may be deployed in the heart separate from other implantable devices. The sensors may include a body with different configurations for attaching to the implantable device, such as apertures for sutures or fingers for connecting to structures of the implantable device. The sensors may provide data that allow a determination of aortic regurgitation or other information indicative of function of the implantable device and patient health during and after implantation of the device.
1. A prosthetic heart valve system comprising:
a prosthetic heart valve including:
a stent extending along a longitudinal axis from an outflow portion to an inflow portion and having an expanded condition and a collapsed condition; and
a valve assembly mounted to the stent; and
a first sensor configured to measure physiological data, the first sensor including a body extending along a body axis and a plurality of apertures extending through the body on opposite sides of the body axis,
wherein a first suture attaches the first sensor to the stent via at least some of the plurality of apertures so that, in the expanded condition of the stent, the longitudinal axis of the stent is not parallel to the body axis of the first sensor, and in the collapsed condition of the stent, the longitudinal axis of the stent is parallel to the body axis of the first sensor.
2. The prosthetic heart valve system of claim 1 , further comprising:
a second sensor configured to measure physiological data, the second sensor including a body and a plurality of apertures extending through the body of the second sensor and adapted to receive at least one suture therethrough for attaching the second sensor to the stent.
3. The prosthetic heart valve system of claim 2 , wherein the first sensor is attached to the inflow portion of the stent and the second sensor is attached to the outflow portion of the stent with a second suture.
4. The prosthetic heart valve system of claim 2 , wherein the first and second sensors are each configured to measure blood pressure and each include an induction coil disposed within the respective body and a capacitor in electrical communication with the induction coil.
5. The prosthetic heart valve system of claim 1 , wherein the plurality of apertures includes four apertures arranged in a rectangular pattern on one end of the body.
6. The prosthetic heart valve system of claim 1 , wherein the body of the first sensor includes two lateral projections, the plurality of apertures including at least one aperture extending through each of the two projections.
7. The prosthetic heart valve system of claim 6 , wherein the plurality of apertures includes two apertures extending through each of the two projections.
8. The prosthetic heart valve system of claim 6 , wherein the plurality of apertures includes at least two additional apertures extending through the body exclusive of the projections.
9. The prosthetic heart valve of claim 6 , wherein the inflow portion of the stent includes a first circumferential row of cells, each cell being defined by a plurality of struts, the at least one aperture in each of the two projections being positioned on opposite sides of a selected strut of one of the cells.
10. The prosthetic heart valve of claim 9 , wherein a fastener extends from the at least one aperture in a first of the two lateral projections to the at least one aperture in a second of the two lateral projections, the selected strut being positioned between the fastener and the body of the first sensor.
11. The prosthetic heart valve of claim 10 , wherein the fastener has a first position relative to the selected strut when the stent is in the collapsed condition, and a second position relative to the selected strut when the stent is in the expanded condition, the first position being different than the second position.
12. The prosthetic heart valve system of claim 1 , wherein the body of the first sensor includes four lateral projections, the plurality of apertures including at least one aperture extending through each of the four projections.
13. The prosthetic heart valve system of claim 1 , wherein the body of the first sensor has opposed longitudinal sides and opposed ends, the body of the first sensor including a first projection on one of the ends, a second projection on one of the longitudinal sides adjacent the one end and a third projection on another of the longitudinal sides adjacent the one end, and the plurality of apertures includes at least one aperture extending through each of the projections.
14. The prosthetic heart valve of claim 1 , wherein the valve assembly includes a plurality of leaflets, a pair of adjacent leaflets being coupled to one another and the stent at a commissure attachment feature, the first sensor being aligned with the commissure attachment feature in a longitudinal direction of the stent extending from the inflow portion to the outflow portion.
15. The prosthetic heart valve of claim 1 , wherein the inflow portion of the stent includes a first circumferential row of cells, and a first of the plurality of apertures is positioned in a first cell in the first circumferential row, and a second of the plurality of apertures is positioned in a second cell in the first circumferential row directly adjacent the first cell.
16. The prosthetic heart valve of claim 15 , wherein the first suture extends from the first of the plurality of apertures to the second of the plurality of apertures.