Perianal fistula closure system
Inventors
Gersch, Kiley • DIAZ, Sophia • FRANK, Karina • SLINOWSKY, Monet • ADJEI ARMAH, Ebenezer • BUONO, Zachary • Yazdi, Youseph • Mosley, Evan • HOLSCHER, Russell
Assignees
Baxter Healthcare SA • Baxter International Inc • Johns Hopkins University
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Publication Number
US-12636003-B2
Publication Date
2026-05-26
Expiration Date
Abstract
A system may include a delivery device configured to deploy a perianal fistula closure device and the perianal fistula closure device configured to close a perianal fistula. The delivery device may include a helical catheter. The perianal fistula closure device may include a cap, a suture comprising a plurality of uni-directional barbs, and an anchor connected to an end of the suture comprising a plurality of uni-directional quills.
Core Innovation
The disclosure describes a perianal fistula closure system comprising a delivery device with a helical catheter and a closure device. The closure device includes a cap, a suture bearing uni-directional barbs, and an anchor bearing oppositely oriented uni-directional quills. The barbs and quills resist movement in opposite directions to secure the closure.
The closure device is configured to close a perianal fistula with reduced reliance on knot tying and complex procedures. Prior to deployment, the helical catheter of the delivery device holds the suture in its interior and holds the anchor at its end with the anchor insertion point protruding.
Claims Coverage
The supplied claims identify three inventive features across independent claims 1, 9, and 16. They cover a system combining a delivery device and closure device, the closure device itself, and a device combining the closure device with a delivery device.
System with a helical-catheter delivery device and closure device
Claim 1 covers a delivery device comprising a helical catheter and a perianal fistula closure device comprising a cap, a suture with uni-directional barbs, and an anchor with oppositely oriented uni-directional quills. The barbs and quills resist movement in opposing directions.
Perianal fistula closure device with oppositely oriented retention features
Claim 9 covers a closure device comprising a cap, a suture with uni-directional barbs configured to resist movement in the direction of insertion, and an anchor connected to the suture with oppositely oriented uni-directional quills configured to resist movement opposite to the direction of insertion.
Closure device held within a helical catheter
Claim 16 covers a closure device comprising a cap, a barbed suture, and an oppositely quilled anchor, together with a delivery device comprising a driving component and a connected helical catheter. Before deployment, the catheter holds the suture in its interior and holds the anchor at its end with the anchor’s insertion point protruding.
The independent claims cover the closure device’s cap, suture, and anchor with oppositely oriented movement-resisting features, and, in claims 1 and 16, combinations of that closure device with a helical-catheter delivery device.
Stated Advantages
Reduced reliance on knot tying and complex procedures.
Preserving sphincter function.
Promoting healing.
Reducing recurrence.
Documented Applications
Closing a perianal fistula.
Dispensing a therapeutic drug into the perianal fistula lumen or at the fistula opening.
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