Antenna posts
Inventors
Dagan, Amir • Katz, Yoav • Lipperman, Fabian • Feld, Tanhum • Peleg, Nadav • Ariav, Gal
Assignees
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Publication Number
US-11432949-B2
Publication Date
2022-09-06
Expiration Date
Abstract
Apparatus and methods are described, including a stent configured to be placed in a lumen. The stent includes a generally cylindrical stent body including a plurality of struts, at least one electrode post protruding from the stent body, and a plurality of antenna posts protruding longitudinally from an end of the stent body. The antenna posts are longitudinally separated from the electrode post. An antenna is disposed annularly on the antenna posts, such that the antenna posts separate the antenna from the end of the stent body, and at least one electrode is coupled to the stent by being placed on the electrode post. Additional embodiments are also described.
Core Innovation
The invention relates to a wireless endovascular stent electrode apparatus for use with a tubular structure shaped to define a lumen. It includes a stent configured to be placed in the lumen, where the stent has a generally cylindrical stent body with a plurality of struts, a plurality of electrode posts protruding from the stent body, and a plurality of antenna posts protruding longitudinally from an end of the stent body, with the antenna posts being longitudinally separated from the electrode posts.
An antenna is disposed annularly on the antenna posts, such that the antenna posts separate the antenna from the end of the stent body. A plurality of electrodes are coupled to the stent by being placed on respective electrode posts, and a control capsule is coupled to the stent via one or more coupling elements. The control capsule receives electrical power from the antenna and drives a current through the plurality of electrodes using the received electrical power.
The apparatus constrains the circumferential placement of the electrode posts and coupling elements relative to the stent circumference. The electrode posts are disposed around less than 75 percent of a circumference of the stent, and the one or more coupling elements are disposed around less than 75 percent of the circumference of the stent while being rotationally displaced with respect to all of the electrode posts.
The document further describes refined configurations for operation in blood vessel lumens including curved portions of an aorta. Additional stent features described include a distal ring with greater radial force via thickened struts, a curved-vessel adaptation via compliant antenna posts, and a closed-cell distal section stabilizing electrode longitudinal positioning.
Claims Coverage
The independent claim covers a wireless endovascular stent electrode apparatus with three main inventive features: longitudinal separation of electrode posts and antenna posts, an annular antenna on the antenna posts with a control capsule that receives electrical power and drives current through electrodes, and circumferential reduction plus rotational displacement of coupling elements relative to electrode posts.
Longitudinally separated electrode posts and antenna posts with annular antenna
The stent includes a plurality of electrode posts protruding from a stent body and a plurality of antenna posts protruding longitudinally from an end of the stent body, the antenna posts being longitudinally separated from the electrode posts; an antenna is disposed annularly on the antenna posts such that the antenna posts separate the antenna from the end of the stent body.
Power transfer to control capsule and current driving through electrodes
A control capsule is coupled to the stent via one or more coupling elements, receives electrical power from the antenna, and drives a current through a plurality of electrodes using the received electrical power.
Reduced circumferential placement of electrode posts and rotational displacement of coupling elements
The plurality of electrode posts are disposed around less than 75 percent of a circumference of the stent, and the one or more coupling elements are disposed around less than 75 percent of the circumference of the stent while being rotationally displaced with respect to all of the electrode posts.
Claim coverage centers on a wireless stent electrode apparatus where longitudinal separation enables an annular antenna positioned on antenna posts separated from the stent end, while a control capsule receives power from that antenna and drives current through electrodes mounted on electrode posts. The claim additionally limits electrode-post and coupling-element circumferential coverage to less than 75 percent and requires rotational displacement of coupling elements relative to all electrode posts.
Stated Advantages
Reduces inductive interference by separating the annular antenna from the distal end of the stent.
Documented Applications
Use with a tubular structure shaped to define a lumen, where the apparatus is configured for placement in a blood vessel lumen.
Configuration for a curved portion of an aorta.
Stimulation in an aortic site, including the aortic arch region.
Stated target clinical conditions include heart failure and hypertension.
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