Perorally insertable/removable anti-reflux valve
First Claim
1. An anti-reflux valve prosthesis to be placed in an esophagus, the prosthesis comprising:
- an annular fixation body;
a plurality of retractable spikes spaced along a circumference of the annular body adjacent one end thereof to secure the prosthesis in the esophagus;
a one-way valve depending from the annular fixation body, the one way valve configured to allow orthograde passage therethrough and to inhibit retrograde passage of gastric contents; and
a gas permeable membrane to allow retrograde permeation of a gas therethrough.
1 Assignment
0 Petitions
Accused Products
Abstract
Disclosed are esophageal anti-reflux valve prostheses, and tools and procedures for peroral implantation and extraction of the prostheses. The prostheses disclosed have a semipermeable membrane to allow retrograde passage of gas, magnets disposed at a distal end of the sleeve to facilitate closure, and an outwardly bendable array of spikes that are longitudinally aligned for peroral insertion and lockable into a radially outwardly deployed configuration to keep the prosthesis from dislocating implantation. The implantation tool has inner and outer concentric tubes, the inner tube releasably threadably connected to the prosthesis, the outer tube reverse threaded with the inner tube to advance a distal headpiece to engage, deploy and lock the spikes into the deployed configuration. A vacuum assist can be used to help impact the lumen wall on the spikes. The extraction tool is similar to the implantation tool with an inner tube for threadably engaging the prosthesis, an outer tube with a distal crown with a plurality of shoes to unseat and unlock the spikes, and an overtube shield to receive the spikes and facilitate extraction of the prosthesis.
28 Citations
45 Claims
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1. An anti-reflux valve prosthesis to be placed in an esophagus, the prosthesis comprising:
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an annular fixation body; a plurality of retractable spikes spaced along a circumference of the annular body adjacent one end thereof to secure the prosthesis in the esophagus; a one-way valve depending from the annular fixation body, the one way valve configured to allow orthograde passage therethrough and to inhibit retrograde passage of gastric contents; and a gas permeable membrane to allow retrograde permeation of a gas therethrough. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An anti-reflux valve prosthesis for peroral implantation in an esophagus, the prosthesis comprising:
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an annular body; a valve depending from the annular body, said valve allowing orthograde passage therethrough and inhibiting retrograde passage of gastric contents; and a plurality of spikes spaced along a circumference of the annular body adjacent one end thereof, wherein each of the spikes includes a tip at a free end thereof and a base attached to the annular body and are selectively retractable between a deployed and a retracted alignment with respect to the circumference, and a dog formed between a base and a tip of each of the spikes. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
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Specification