Devices and methods for gastrointestinal bypass
View Patent ↗Devices and methods for gastrointestinal bypass are described. A gastrointestinal bypass device includes a gastrointestinal cuff and a gastrointestinal sleeve. The cuff may be configured to be attached in the esophagus, and may be sufficiently flexible to expand and collapse to conform with the inside of the esophagus to allow the esophagus to function substantially normally. The sleeve is configured to be coupled to the cuff, and may be made of a material that is floppy or flaccid but does not substantially expand radially.
1. A device for delivering a tissue anchor through a tissue wall, the device comprising:
a catheter having a central lumen, the catheter having a side port formed in a distal portion of the catheter, the side port having a proximal side closer to a proximal portion of the catheter and a distal side farther from the proximal portion of the catheter;
a sled slidably disposed in the central lumen of the catheter, the sled having a sheathing channel, the sheathing channel having a proximal opening configured to be positioned at the distal side of the side port;
a delivery needle slidably disposed in the sheathing channel, the delivery needle having a needle lumen configured to receive the tissue anchor, the delivery needle having a tip pointed proximally, the delivery needle configured to be advanced proximally through the distal side of the side port, the sheathing channel configured to sheath the delivery needle, the delivery needle having a retracted position wherein the tip of the delivery needle is positioned at the distal side of the side port; and
a pushrod slidably disposed in the needle lumen.
2. The device of claim 1 , further comprising:
a sled control rod coupled to the sled, the sled control rod configured to slide the sled in the central lumen;
a needle control rod coupled to a distal control portion of the delivery needle, the needle control rod configured to slide the delivery needle in the sheathing channel; and
a pushrod control rod coupled to a distal control portion of the pushrod, the pushrod control rod configured to slide the pushrod in the needle lumen.
3. The device of claim 2 , wherein the sled control rod, the needle control rod, and the pushrod control rod are coaxial.
4. The device of claim 1 , further comprising:
a holder coupled to the sled, the holder configured to hold a portion of a gastrointestinal cuff over a proximal delivery portion of the delivery needle.
5. The device of claim 4 , further comprising:
a holder control rod coupled to the holder, the holder control rod configured to rotate and slide the holder.
6. The device of claim 1 , further comprising:
a vacuum source configured to generate a vacuum in the central lumen and draw a portion of the tissue wall through the side port.
7. The device of claim 1 , further comprising:
a tissue brace slidably disposed within a brace lumen of the catheter, the tissue brace configured to removably cover the side port.
8. The device of claim 1 , wherein the delivery needle includes a longitudinal slot.
9. The device of claim 8 , wherein the pushrod includes a longitudinal channel aligned with the longitudinal slot.
10. The device of claim 1 , wherein the pushrod includes a proximal delivery portion that is tapered.