Endoscopic stapling devices and methods
First Claim
1. A fluid-actuated endoscopic tissue fastening instrument, comprising:
- an elongate shaft having a flexible distal portion and a proximal portion;
a head mounted to the distal portion of the shaft, the head comprising a fastener housing and an anvil housing, said housings defining a region therebetween where tissue can be received,the fastener housing havinga hydraulic chamber disposed within the fastener housing,a compression piston at least partially disposed within the hydraulic chamber for movement therein,a second chamber disposed within the compression piston,a staple piston at least partially disposed within the second chamber for movement therein,a fastener holder carrying at least one fastener, the fastener holder being attached to the compression piston for movement therewith in the fastener housing, anda fluid line extending through said shaft and fluidly coupled to the hydraulic chamber and the second chamber in said fastener housing, whereinthe compression piston and attached fastener holder is advanceable within the hydraulic chamber in response to flow of fluid from the fluid line into the hydraulic chamber to advance the fastener holder against tissue disposed between the two housings, andthe staple piston is advanceable within the second chamber in response to fluid flow of fluid from the fluid line into the second chamber to advance the at least one fastener from the fastener holder into tissue disposed between the two housings.
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0 Petitions
Accused Products
Abstract
Described herein are endoscopic staplers used to apply one or more fasteners to body tissue. In one embodiment, a fastener-applying device, which is preferably a stapler, is passed transorally into the stomach and used to plicate stomach tissue by engaging tissue from inside of the stomach and drawing it inwardly. In the disclosed embodiments, the tissue is drawn inwardly into a vacuum chamber, causing sections of serosal tissue on the exterior of the stomach to be positioned facing one another. The disclosed staplers allow the opposed sections of tissue to be moved into contact with one another, and preferably deliver staples for maintaining contact between the tissue sections at least until serosal bonds form between them. Each of these steps may be performed wholly from the inside of the stomach and thus can eliminate the need for any surgical or laparoscopic intervention. After one or more plications are formed, medical devices may optionally be coupled to the plication(s) for retention within the stomach.
511 Citations
21 Claims
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1. A fluid-actuated endoscopic tissue fastening instrument, comprising:
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an elongate shaft having a flexible distal portion and a proximal portion; a head mounted to the distal portion of the shaft, the head comprising a fastener housing and an anvil housing, said housings defining a region therebetween where tissue can be received, the fastener housing having a hydraulic chamber disposed within the fastener housing, a compression piston at least partially disposed within the hydraulic chamber for movement therein, a second chamber disposed within the compression piston, a staple piston at least partially disposed within the second chamber for movement therein, a fastener holder carrying at least one fastener, the fastener holder being attached to the compression piston for movement therewith in the fastener housing, and a fluid line extending through said shaft and fluidly coupled to the hydraulic chamber and the second chamber in said fastener housing, wherein the compression piston and attached fastener holder is advanceable within the hydraulic chamber in response to flow of fluid from the fluid line into the hydraulic chamber to advance the fastener holder against tissue disposed between the two housings, and the staple piston is advanceable within the second chamber in response to fluid flow of fluid from the fluid line into the second chamber to advance the at least one fastener from the fastener holder into tissue disposed between the two housings. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification