Posts with compliant junctions
Apparatus and methods are described, including a stent configured to be placed in a lumen. The stent includes a generally cylindrical stent body comprising a plurality of struts, and a plurality of antenna posts protruding longitudinally from an end of the stent body. Each of the antenna posts includes a proximal and distal portions, each of which is configured to be generally straight in the absence of any force being applied to the antenna post, and a compliant junction disposed between the proximal and distal portions, the proximal and distal portions being configured to flex with respect to one another about the compliant junction. An antenna is disposed annularly on the distal portions of the antenna posts, such that the antenna posts separate the antenna from the end of the stent body. Other applications are also described.
1. Apparatus for use with a tubular structure shaped to define a lumen thereof, the apparatus comprising:
a stent configured to be placed in the lumen, the stent comprising:
a generally cylindrical stent body comprising a plurality of struts; and
a plurality of antenna posts protruding longitudinally from an end of the stent body, each of the antenna posts comprising:
a proximal portion and a distal portion, each of which is configured to be generally straight in the absence of any force being applied to the antenna post; and
a compliant junction (i) disposed between the proximal portion and distal portion of the antenna post, the proximal portion and distal portion being configured to flex with respect to one another about the compliant junction, and (ii) shaped to define a sinusoidal wave;
a nitinol wire; and
an antenna coupled to the nitinol wire and disposed annularly on the distal portions of the antenna posts, such that the antenna posts separate the antenna from the end of the stent body,
wherein each of the antenna posts is connected only to the stent body, the antenna, and the nitinol wire.
2. The apparatus according to claim 1 , wherein the lumen of the tubular structure includes a lumen of a blood vessel of a subject, and wherein the stent is configured to be placed inside the lumen of subject's blood vessel.
3. The apparatus according to claim 2 , wherein the compliant junction is shaped to define a single sinusoidal wave.
4. The apparatus according to claim 2 , wherein the compliant junction is shaped to define 1.5 sinusoidal waves.
5. The apparatus according to claim 2 , wherein the compliant junction is shaped to define 2 or more sinusoidal waves.
6. The apparatus according to claim 2 , wherein the lumen of the blood vessel includes a lumen of a curved portion of an aorta of the subject, and wherein the stent is configured to be placed inside the lumen of the curved portion of the subject's aorta.
7. The apparatus according to claim 6 , wherein the compliant junction is configured to facilitate flexing of the distal portion of the antenna post with respect to the proximal portion of the antenna post, such that the post at least partially conforms with a curvature of the curved portion of the aorta even at an inner region of the curved portion of the aorta, at which a curvature of the curved portion of the aorta is greater than a curvature of an outer region of the curved portion of the aorta.
8. The apparatus according to claim 7 , wherein the nitinol wire is configured to self-expand inside the curved portion of the subject's aorta such as to bring the antenna into contact with an inner wall of the aorta, and wherein the compliant junction is configured to facilitate flexing of the distal portion of the antenna post with respect to the proximal portion of the antenna post, such that the antenna is brought into contact with the inner wall of the aorta even at the inner region of the curved portion of the aorta.
9. The apparatus according to claim 2 , wherein the antenna posts are parallel to a central longitudinal axis of the stent body.
10. Apparatus for use with a tubular structure shaped to define a lumen thereof, the apparatus comprising:
a stent configured to be placed in the lumen, the stent comprising:
a generally cylindrical stent body comprising a plurality of struts; and
a plurality of antenna posts protruding longitudinally from an end of the stent body and parallel to a central longitudinal axis of the stent body, each of the antenna posts comprising:
a proximal portion and a distal portion, each of which is configured to be generally straight in the absence of any force being applied to the antenna post; and
a compliant junction (i) disposed between the proximal portion and distal portion of the antenna post, the proximal portion and distal portion being configured to flex with respect to one another about the compliant junction, and (ii) shaped to define 1.5 sinusoidal waves; and
an antenna disposed annularly on the distal portions of the antenna posts, such that the antenna posts separate the antenna from the end of the stent body,
wherein the lumen of the tubular structure includes a lumen of a blood vessel of a subject, and wherein the stent is configured to be placed inside the lumen of subject's blood vessel.
11. The apparatus according to claim 10 , wherein the lumen of the blood vessel includes a lumen of a curved portion of an aorta of the subject, and wherein the stent is configured to be placed inside the lumen of the curved portion of the subject's aorta.
12. The apparatus according to claim 11 , wherein the compliant junction is configured to facilitate flexing of the distal portion of the antenna post with respect to the proximal portion of the antenna post, such that the post at least partially conforms with a curvature of the curved portion of the aorta even at an inner region of the curved portion of the aorta, at which a curvature of the curved portion of the aorta is greater than a curvature of an outer region of the curved portion of the aorta.
13. The apparatus according to claim 12 , further comprising a self-expandable wire that is coupled to the antenna, and that is configured to self-expand inside the curved portion of the subject's aorta such as to bring the antenna into contact with an inner wall of the aorta, and wherein the compliant junction is configured to facilitate flexing of the distal portion of the antenna post with respect to the proximal portion of the antenna post, such that the antenna is brought into contact with the inner wall of the aorta even at the inner region of the curved portion of the aorta.
14. The apparatus according to claim 10 , further comprising a nitinol wire, the antenna being coupled to the nitinol wire, wherein each of the antenna posts is connected only to the stent body, the antenna, and the nitinol wire.
15. Apparatus for use with a tubular structure shaped to define a lumen thereof, the apparatus comprising:
a stent configured to be placed in the lumen, the stent comprising:
a generally cylindrical stent body comprising a plurality of struts; and
a plurality of antenna posts protruding longitudinally from an end of the stent body and parallel to a central longitudinal axis of the stent body, each of the antenna posts comprising:
a proximal portion and a distal portion, each of which is configured to be generally straight in the absence of any force being applied to the antenna post; and
a compliant junction (i) disposed between the proximal portion and distal portion of the antenna post, the proximal portion and distal portion being configured to flex with respect to one another about the compliant junction, and (ii) shaped to define 2 or more sinusoidal waves; and
an antenna disposed annularly on the distal portions of the antenna posts, such that the antenna posts separate the antenna from the end of the stent body,
wherein the lumen of the tubular structure includes a lumen of a blood vessel of a subject, and wherein the stent is configured to be placed inside the lumen of subject's blood vessel.
16. The apparatus according to claim 15 , wherein the lumen of the blood vessel includes a lumen of a curved portion of an aorta of the subject, and wherein the stent is configured to be placed inside the lumen of the curved portion of the subject's aorta.
17. The apparatus according to claim 16 , wherein the compliant junction is configured to facilitate flexing of the distal portion of the antenna post with respect to the proximal portion of the antenna post, such that the post at least partially conforms with a curvature of the curved portion of the aorta even at an inner region of the curved portion of the aorta, at which a curvature of the curved portion of the aorta is greater than a curvature of an outer region of the curved portion of the aorta.
18. The apparatus according to claim 17 , further comprising a self-expandable wire that is coupled to the antenna, and that is configured to self-expand inside the curved portion of the subject's aorta such as to bring the antenna into contact with an inner wall of the aorta, and wherein the compliant junction is configured to facilitate flexing of the distal portion of the antenna post with respect to the proximal portion of the antenna post, such that the antenna is brought into contact with the inner wall of the aorta even at the inner region of the curved portion of the aorta.
19. The apparatus according to claim 15 , further comprising a nitinol wire, the antenna being coupled to the nitinol wire, wherein each of the antenna posts is connected only to the stent body, the antenna, and the nitinol wire.