Balloon wrapping apparatus and balloon wrapping method

Patent metadata

Field	Value
Publication number	US-10869995-B2
Application number	US-201815928542-A
Country	US
Kind code	B2
Filing date	Mar 22, 2018
Priority date	Sep 25, 2015
Publication date	Dec 22, 2020
Grant date	Dec 22, 2020

Abstract

A balloon wrapping apparatus and a balloon wrapping method are disclosed by which a balloon can be accurately positioned in relation to a pleating section and to a folding section. The balloon wrapping apparatus for wrapping a balloon of a balloon catheter provided with the balloon at a distal portion of an elongated shaft includes: a pleating section having a plurality of blades aligned with space parts therebetween in a circumferential direction, and forms the balloon with wing shapes projecting in radial directions by clamping the balloon in the space parts by moving rotationally the blades; and a folding section having a plurality of blades aligned in a circumferential direction, and that folds the wing shapes formed in the balloon in the circumferential direction by moving rotationally the blades; and a support base that supports a part of the shaft which part is on a proximal side of the balloon.

First claim

What is claimed is:

1. A balloon wrapping apparatus for wrapping a balloon of a balloon catheter provided with the balloon at a distal portion of an elongated shaft, the balloon wrapping apparatus comprising:
a pleating section having a plurality of wing forming members aligned with spaces between the plurality of wing forming members in a circumferential direction, and configured to form the balloon with wing shapes projecting in radial directions by the wing forming members clamping the balloon, which causes the balloon to enter into the spaces, by moving rotationally the plurality of wing forming members;
a folding section that has a plurality of folding members aligned in the circumferential direction, and configured to fold the wing shapes formed in the balloon by moving rotationally the plurality of folding members, each of the pleating section and the folding section being disposed on a base;
a pivotable support base configured to support a part of the elongated shaft which part is on a proximal side of the balloon, the elongated shaft extending in one direction from the balloon, and the support base configured to arrange the distal portion of the elongated shaft positionable in relation to the pleating section and the folding section, the support base having a holding portion configured to maintain a position of the elongated shaft;
a grasping section provided in the pleating section and in the folding section, the grasping section capable of grasping a part of the balloon catheter which part is on a distal side of the balloon; and
a pulling section provided in the pleating section and in the folding section, the pulling section configured to apply a pulling force to the balloon catheter by moving the grasping section and the holding portion away from each other, and wherein the pulling section is moved in a distal direction relative to the distal side of the balloon.

2. The balloon wrapping apparatus according to claim 1 , wherein the grasping section has a grasping surface formed of a recessed curved surface.

3. The balloon wrapping apparatus according to claim 1 , comprising:
a core metal member that is inserted into the elongated shaft.

4. The balloon wrapping apparatus according to claim 1 , wherein each of the plurality of wing forming members is a plate-shaped member, which are disposed at equal angular intervals along the circumferential direction.

5. The balloon wrapping apparatus according to claim 4 , wherein the plurality of wing forming members is three in number.

6. The balloon wrapping apparatus according to claim 4 , wherein each of the plurality of wing forming members has a rotational center portion on an outer circumferential end portion of the wing forming member and a moving pin extending in an axial direction on an inner circumferential side of the rotational center portion, and wherein each of the moving pins is fitted in a fitting groove formed in a rotary member, which is configured to be rotatable in the pleating section.

7. The balloon wrapping apparatus according to claim 6 , wherein when the rotary member is rotated, the moving pins fitted in the fitting grooves are moved in the circumferential direction, whereby each of the plurality of wing shaped member is moved rotationally about the rotational center portion.

8. The balloon wrapping apparatus according to claim 1 , wherein each of the plurality of wing forming members is a plate-shaped member, and wherein the plurality of wing forming members are each positioned along an axial direction of the balloon catheter and are disposed such that each of the plurality of plate-shaped member are arranged at equal interval along the circumferential direction.

9. The balloon wrapping apparatus according to claim 8 , wherein each of the plurality of wing forming members has a moving pin extending in the axial direction, and wherein each of the moving pins is fitted in a fitting groove formed in a rotary member, which is rotatable in the folding section.

10. The balloon wrapping apparatus according to claim 9 , wherein each of the plurality of wing forming members are arranged at an angle of 36° from one another.

11. The balloon wrapping apparatus according to claim 3 , wherein the pulling force applied to the balloon catheter is applied by pulling the balloon catheter with a force of not less than 0.5 N.

12. The balloon wrapping apparatus according to claim 11 , wherein the pulling force applied to the balloon catheter is applied by grasping a distal portion of the balloon catheter and thereafter moving the distal portion of the balloon catheter by not less than 1 mm.

13. The balloon wrapping apparatus according to claim 1 , wherein the pulling section includes a sliding portion configured to fit to a guide groove portion on a base, a pinion configured to mesh with a rack having teeth arranged rectilinearly on the base, and a dial configured to rotate the pinion.

14. The balloon wrapping apparatus according to claim 1 , further comprising:
a first film supplying section configured to supply a film to the plurality of wing forming members in the pleating section, and wherein the film prevents direct contact of a surface of the plurality of wing forming members with the balloon in the pleating section; and
a second film supplying section configured to supply a film to the plurality of wing forming members in the folding section, and wherein the film prevents direct contact of the surface of the plurality of wing forming members with the balloon in the folding section.

15. A balloon wrapping apparatus for wrapping a balloon of a balloon catheter arranged with the balloon at a distal portion of an elongated shaft, the elongated shaft extending in one direction from the balloon, the balloon wrapping apparatus comprising:
a pleating section having a plurality of blades aligned with spaces between the plurality of blades in a circumferential direction, and configured to form the balloon with wing shapes projecting in radial directions by rotating the blades of the pleating section;
a folding section having a plurality of blades aligned in a circumferential direction, and configured to fold the wing shapes formed in the balloon in the circumferential direction by rotating the blades of the folding section, each of the pleating section and the folding section being disposed on a base and oriented in a different direction by a predetermined angle from each other;
a pivotable support base configured to support a part of an elongated shaft which part is on a proximal side of the balloon, the support base having a holding portion configured to maintain a position of the elongated shaft;
a grasping section provided in the pleating section and in the folding section, the grasping section configured to grasp a part of the balloon catheter, which part is on a distal side of the balloon; and
a pulling section provided in the pleating section and in the folding section, the pulling section configured to apply a pulling force to the balloon catheter by moving the grasping section and the holding portion away from each other, and wherein the pulling section is moved in a distal direction relative to the distal side of the balloon.

16. The balloon wrapping apparatus according to claim 15 , wherein each of the plurality of blades of the pleating section are disposed at equal angular intervals along the circumferential direction;
wherein each of the plurality of blades of the pleating section has a rotational center portion on an outer circumferential end portion of the blade of the pleating section and a moving pin extending in an axial dire

Assignees

• Terumo Corp

Inventors

• Kurosaki Yasuo
• Goto Hiroshi

Classifications

• B29L2031/7543

  Balloon catheters · CPC title

• B29C53/08

  of tubes {or other profiled members} · CPC title

• A61M25/1038 Primary

  Wrapping or folding devices for use with balloon catheters · CPC title

• A61M25/1029

  Production methods of the balloon members, e.g. blow-moulding, extruding, deposition or by wrapping a plurality of layers of balloon material around a mandril · CPC title

• B29C70/682

  Preformed parts characterised by their structure, e.g. form · CPC title