Surgical insertion instrument body having a distending portion

• US 6,485,458 B1
• Filed: 01/26/2000
• Issued: 11/26/2002
• Est. Priority Date: 01/27/1999
• Status: Expired due to Term

• Current Assignee: Johnson & Johnson Kabushiki Kaisha (Johnson & Johnson)
• Original Assignee: Johnson & Johnson Kabushiki Kaisha (Johnson & Johnson)
• Inventors: Takahashi, Katsumi
• Primary Examiner(s): Casler, Brian L.
• Assistant Examiner(s): Thanh, LoAn H.
• Application Number:
  US09/491,617
• Time in Patent Office: 1,035 Days
• Field of Search: 604/104-109, 604/13, 604/264, 604/523, 604/525, 604/528, 604/530-532, 604/534-536, 604/96.01, 606/191, 606/197-199, 600/433-435
• US Class Current: 604/104
• CPC Class Codes: A61M 2025/09083 having a coil around a core
• CPC Class Codes: A61M 2205/0266 Shape memory materials
• CPC Class Codes: A61M 29/02 Dilators made of swellable material balloon catheters for angioplasty A61M25/104

Abstract

An insertion instrument body includes a longitudinal metallic core portion, a distending portion and a power supply means. The metallic core portion is inserted into a lumen such as a blood vessel. The distending portion is fixed to an outer face of the metallic core portion. The power supply means heats the distending portion above a transforming temperature. The distending portion includes a cylindrical portion which is mountable on the metallic core portion; and a plurality of rod-shaped portions which are integrally formed in the cylindrical portion and which are made of a shape-memory material. The rod-shaped portion returns to an original shape by displacing in an intersecting direction with respect to a longitudinal direction of the metallic core portion. An electrical insulating layer is formed on an outer surface of the metallic core portion, and the electrical insulating layer is covered with a flexible sleeve. A power supply means is constituted of the metallic core portion, the flexible sleeve, a power source and a switch.

Claims

1. An insertion instrument body to be inserted into a lumen comprising:

a longitudinal base portion insertable into the lumen;

a distending portion arranged on an outer face of the distal end of said base portion, wherein said distending portion extends along a longitudinal direction of said base portion and is at least partially formed of a shape-memory material having a transforming temperature; and

a power supply means for heating said distending portion to a temperature above the transforming temperature; and

wherein the base portion is formed of a conductive material, and a conductive sleeve is arranged on an outer face of the base portion through an electrical insulating layer.

2. The insertion instrument body of claim 1 wherein the distending portion is supported on a peripheral part of a cylindrical portion.

3. The insertion instrument body of claim 2 wherein a cross section of the distending portion extends transversely with respect to the longitudinal areas the distending portion.

4. The insertion instrument body of claim 3 wherein in an outer apex of the distending portion has a sharp angle.

5. The insertion instrument body of claim 3 wherein the conductive sleeve is divided into two parts in a longitudinal direction of the base portion;

the distending portion connects the divided conductive sleeves in the longitudinal direction of the base portion to join both sleeves;

one of the sleeves is electrically connected with the base portion, and the other is electrically insulated from the base portion.

6. The insertion instrument body of claim 2 wherein the distending portion is arranged on the peripheral part of the cylindrical portion at regular intervals.

7. The insertion instrument body of claim 2 wherein the distending portion spirally extends from one of the peripheral parts of the cylindrical portion.

8. The insertion instrument body of claim 1, wherein there are a plurality of distending portions.

9. The insertion instrument body of claim 1 wherein the distending portion is plate-shaped or wire-shaped.

10. The insertion instrument body of claim 1 wherein the distending portion is arranged on an outer face of the distal end of the base portion.

11. The insertion instrument body of claim 1 wherein the distending portion is integrally formed therein.

12. The insertion instrument body of claim 1 wherein the distal end to be inserted into the lumen is tapered.

13. The insertion instrument body of claim 1 wherein the distending portions are accommodated in a space defined by an outer face of the cylindrical portion.