Constriction device including fixation structure
View Patent ↗A constriction device that constricts body tissue includes fixation structures for fixing the device on constricted body tissue. The device includes an elongated sleeve including an inner surface and opposed opened ends. The device is formed from expandable or elastic material so that when in an expanded condition, body tissue to be constricted may be received therein and thereafter, when released from the expanded condition, the body tissue is constricted by the device. The fixation structures include a plurality of fixation elements on the inner surface of the sleeve that grasp the body tissue upon release of the sleeve from the expanded condition to fix the device on the constricted tissue.
1. A method of permanently constricting lung tissue, the method comprising the steps of:
exposing the thoracic cavity;
radially expanding an elongated sleeve having an inner surface and opposed ends with one end being open for receiving the lung tissue;
drawing the lung tissue to be constricted in the expanded sleeve;
releasing the sleeve from the expanded condition to constrict the lung tissue therein, the sleeve being arranged to contract when released; and
fixating a portion of the sleeve to the lung tissue with a plurality of fixation elements projecting inward of the inner surface that grasp the lung tissue upon release of the sleeve from the expanded condition.
2. The method of claim 1 , wherein the elongated sleeve is arranged to elastically contract when released from the expanded condition.
3. The method of claim 1 , wherein when the lung tissue is positioned in the expanded sleeve, the lung tissue at least partially fills a space between the fixation elements.
4. The method of claim 1 , wherein when the sleeve is released from the expanded condition, the fixation elements move toward each other to grasp the lung tissue.
5. The method of claim 1 , wherein the elongated sleeve comprises a radiopaque material.
6. The method of claim 5 , wherein the radiopaque material comprises strips.
7. The method of claim 6 , wherein the strips are longitudinally oriented along the inner surface of the elongated sleeve.
8. The method of claim 5 , further comprising confirming the positioning of the sleeve through fluoroscopy.
9. The method of claim 1 , wherein the fixation elements are substantially square shaped pads.
10. The method of claim 9 , wherein the square shaped pads are arranged in a plurality of rows.
11. The method of claim 10 , wherein the plurality of rows circumscribe one end of the elongated sleeve.
12. The method of claim 1 , wherein the fixation elements are substantially elongated bars.
13. The method of claim 1 , further comprising severing the elongated sleeve and constricted lung tissue.