Equipment for preparing valve leaflet from membrane

Patent metadata

Field	Value
Publication number	US-10492904-B2
Application number	US-201715606678-A
Country	US
Kind code	B2
Filing date	May 26, 2017
Priority date	May 27, 2016
Publication date	Dec 3, 2019
Grant date	Dec 3, 2019

Abstract

A device prepares leaflets for cardiovascular valve reconstruction from a pericardial tissue sheet harvested from a patient. A cutter is adapted to cut a predetermined pattern having a selected leaflet size. A tissue marker automatically aligned with the predetermined cutting pattern is configured to mark suture positions on the leaflet in response to placement of the cutter. Cutting of a leaflet from the tissue sheet and marking of suture positions on the leaflet are obtained concurrently. A set of such devices spanning a variety of leaflet sizes may be provided in a kit that results in an ability to quickly obtain a properly sized and marked leaflet for reconstruction.

First claim

What is claimed is:

1. A device for preparing leaflets for cardiovascular valve reconstruction from a tissue sheet, comprising:
a cutter configured to cut a predetermined cutting pattern having a selected leaflet size;
a base plate generally conforming to a desired leaflet profile, wherein the base plate has a bottom groove according to the predetermined pattern, wherein the cutter is comprised of a cutting blade mounted in the bottom groove, wherein the base plate has a plurality of apertures according to the suture positions, and
a plunger slidably mounted to the base plate having a thrust surface arranged to press the ink applicators to downwardly extend through the apertures;
a bias member urging the thrust surface toward an upward position; and
a tissue marker comprised of a plurality of ink applicators each mounted in a respective aperture and automatically aligned with the predetermined cutting pattern to mark suture positions on a prepared leaflet in response to placement of the cutter;
wherein cutting of the prepared leaflet from the tissue sheet and marking of suture positions on the leaflet are obtained concurrently;
wherein manually pressing the base plate against the tissue sheet cuts the predetermined cutting pattern of the cutting blade and manually pressing the plunger marks the suture positions while a cut leaflet remains within the cutting blade.

2. The device of claim 1 , wherein each ink applicator includes a bias spring that retracts the ink applicator against the thrust surface in the upward position.

3. The device of claim 1 , wherein the plunger comprises a rigid top section and a resilient bottom section providing the thrust surface.

4. The device of claim 3 , wherein the rigid top section includes a mounting shaft slidably attached to the base plate.

5. A device for preparing leaflets cut from a tissue sheet for cardiovascular valve reconstruction, comprising:
a base plate generally conforming to a desired leaflet size, wherein the base plate has a bottom groove according to a predetermined cutting pattern corresponding to the desired leaflet size, and wherein the base plate has a plurality of apertures according to a pattern of predetermined suture positions for the desired leaflet size; a cutting blade mounted in the bottom groove; a plurality of ink applicators each mounted in a respective aperture; a plunger slidably mounted to the base plate having a thrust surface arranged to press the ink applicators to downwardly extend through the apertures; and
a bias member urging the thrust surface toward an upward position;
wherein manually pressing the base plate against the tissue sheet cuts the predetermined cutting pattern of the cutting blade through the tissue sheet to cut the prepared leaflet and manually pressing the plunger marks the pattern of predetermined suture positions while the prepared leaflet remains within the cutting blade.

6. The device of claim 5 , wherein each ink applicator includes a bias spring that retracts the ink applicator against the thrust surface in the upward position.

7. The device of claim 5 , wherein the plunger comprises a rigid top section and a resilient bottom section providing the thrust surface.

8. The device of claim 7 , wherein the rigid top section includes a mounting shaft slidably attached to the base plate.

Assignees

• Terumo Cardiovascular Sys Corp

Inventors

• Tsubouchi Takeshi
• Kadykowski Randal J

Classifications

• B26F1/44

  Cutters therefor; Dies therefor · CPC title

• B26F1/386

  Draw punches, i.e. punch and die assembled on opposite sides of a workpiece via a connecting member passing through an aperture in the workpiece · CPC title

• B26F1/3853

  cutting out frames (B26F1/384, B26F1/40 and B26F1/44 take precedence) · CPC title

• A61F2250/0097

  Visible markings, e.g. indicia · CPC title

• B26F1/3813

  wherein the tool head is moved in a plane parallel to the work in a coordinate system fixed with respect to the work · CPC title