Temporary Disposable Scaffold Stand and Tools to Facilitate Reconstructive Valve Surgery

Patent metadata

Field	Value
Publication number	US-2017325940-A1
Application number	US-201715594080-A
Country	US
Kind code	A1
Filing date	May 12, 2017
Priority date	May 13, 2016
Publication date	Nov 16, 2017
Grant date	—

Abstract

A device for joining individual leaflets for repairing a cardiac valve of a patient has a base and projection fingers rising from the base to support adjacent leaflets for tacking together by sewing overlapping edges of adjacent leaflets prior to emplacement into the patient. The invention provides a cutting tool for excising leaflets from a pericardial tissue sheet according to predetermined sizes and shapes. A leaflet having a desired contour and size is obtained by pressing the tool formed as a cutter block against the tissue sheet. A set of blocks can be provided wherein each cutter block has an outer edge following a respective contour and size for a leaflet, and wherein the outer edge includes a raised cutting edge for pressing through the pericardial tissue sheet. The blocks can be held in a press for assisting in pushing the cutting edge through the tissue.

First claim

What is claimed is:

1 . A scaffold for supporting a leaflet for repairing a cardiac valve in a cardiovascular system of a patient, comprising:
a base; and projection fingers rising from the base configured to support adjacent leaflets for tacking together by sewing overlapping edges of the adjacent leaflets in preparation for emplacement into the patient.

2 . The scaffold of claim 1 wherein the base and projection fingers define an inner chamber and a plurality of suction holes adapted to hold a leaflet by suction when a vacuum is introduced into the inner chamber.

3 . The scaffold of claim 1 wherein the base and projection fingers are integrally molded.

4 . The scaffold of claim 1 wherein the base and projection fingers are each comprised of hollow tubing.

5 . The scaffold of claim 4 wherein the tubing defines a plurality of suction holes adapted to hold a leaflet by suction when a vacuum is introduced into the tubing.

6 . A cutting device for cutting a leaflet from a pericardial tissue sheet, comprising:
a set of plate members having a plurality of predetermined leaflet contours and sizes adapted to allow selection of plate members to match an anatomy of a patient; and a raised cutting edge projecting from each respective plate member configured to cut a leaflet according to the predetermined contour and size of the respective plate member in response to pressing against the pericardial tissue sheet.

7 . The cutting device of claim 6 wherein each plate member further includes raised posts for forming sewing depressions into the pericardial sheet to guide sewing of the leaflet.

8 . The cutting device of claim 6 wherein each cutting edge following a contour and size for a plurality of unified leaflets for pressing against the pericardial tissue sheet to create an integral leaflet set.

9 . The cutting device of claim 6 further comprising:
a press having upper and lower press plates, wherein the upper press plate is adapted to removably retain a selected plate member as a cutter block for a desired leaflet contour and size, and wherein the lower press plate is adapted to support the pericardial tissue sheet and provides a reaction surface to allow the cutting edge of the plate member to penetrate the pericardial tissue sheet.

Assignees

• Terumo Cardiovascular Sys Corp

Inventors

• Graybill Matthew W
• Kadykowski Randal J
• Line Kevin R

Classifications

• A61F2/2409 Primary

  Support rings therefor, e.g. for connecting valves to tissue (annuloplasty rings A61F2/2442) · CPC title

• A61F2/2412

  with soft flexible valve members, e.g. tissue valves shaped like natural valves · CPC title

• B26F1/40

  using a press, e.g. of the ram type (presses in general B30B) · CPC title

• A61F2/2427

  Devices for manipulating or deploying heart valves during implantation · CPC title

• A61F2/2415 Primary

  Manufacturing methods · CPC title