Medical apparatus

• US 7,025,763 B2
• Filed: 03/26/2003
• Issued: 04/11/2006
• Est. Priority Date: 03/26/2002
• Status: Active Grant

• Current Assignee: Olympus Corporation
• Original Assignee: Olympus Corporation
• Inventors: Karasawa, Hitoshi, Yachi, Chie
• Primary Examiner(s): Cohen, Lee S.
• Application Number:
  US10/397,981
• Publication Number:
  US 20030187429A1
• Time in Patent Office: 1,112 Days
• Field of Search: 606 27- 29, 606/51, 219/229, 301/40
• US Class Current: 606/28
• CPC Class Codes: A61B 18/085 Forceps, scissors
• CPC Class Codes: A61B 2017/00973 pedal-operated
• CPC Class Codes: A61B 2018/00101 low, i.e. thermally insulating

Abstract

The medical apparatus of this invention includes a therapeutic section at least having a blade for treating a living tissue thermally, a heat insulating part for insulating heat conduction from the blade to the main body of the medical apparatus. The therapeutic section and the heat insulating part are preferably provided on a grasping section (for example, a pair of jaws) for grasping the living tissue. It is preferable that the therapeutic section has a shape such that the living tissue and the side surface of the therapeutic section do not contact with each other. It is also preferable that the heat insulating portion has a shape such that the living tissue and the heat insulating portion do not contact with each other.

Claims

1. A medical apparatus comprising:

a grasping section for grasping a living tissue;

a therapeutic part having a blade for applying thermal treatment to the living tissue, the blade being provided in the grasping section on a side thereof which contacts the living tissue; and

a heat insulating part made of a material lower in thermal conductivity than the blade, the heat insulating part being disposed between the grasping section and the blade;

wherein the heat insulating part holds at least the blade and a space between the heat insulating part and the blade is filled with a filler having heat insulating properties.

2. A medical apparatus comprising:

a grasping section for grasping a living tissue;

a therapeutic part having a blade for applying thermal treatment to the living tissue, the blade being provided in the grasping section on a side thereof which contacts the living tissue; and

a heat insulating part made of a material lower in thermal conductivity than the blade, the heat insulating part being disposed between the grasping section and the blade;

wherein the blade is movably fixed to the grasping section with a predetermined margin for a variation due to heat in at least one of a size or length of the blade.

3. A medical apparatus according to claim 2, wherein the fixation of the blade is realized by a pin being fitted into a hole formed in the grasping section to receive the pin with a predetermined margin.

4. A medical apparatus according to claim 3, wherein the hole is an elongated slot which is elongated in approximately a same direction as a longitudinal direction of the therapeutic part.

5. A medical apparatus

a grasping section for grasping a living tissue;

a therapeutic part having a blade for applying thermal treatment to the living tissue, the blade being provided in the grasping section on a side thereof which contacts the living tissue; and

a heat insulating part made of a material lower in thermal conductivity than the blade, the heat insulating part being disposed between the grasping section and the blade;

wherein the grasping section has a pair of jaws that are relatively movable between opened and closed positions and each of the pair of jaws have an extended portions extended forwardly from the blade and each of the extended portions has a tapered portion.

6. A medical apparatus

a grasping section for grasping a living tissue;

a therapeutic part having a blade for applying thermal treatment to the living tissue, the blade being provided in the grasping section on a side thereof which contacts the living tissue; and

a heat insulating part made of a material lower in thermal conductivity than the blade, the heat insulating part being disposed between the grasping section and the blade;

wherein the grasping section has a pair of jaws that are relatively movable between opened and closed positions and the pair of jaws respectively have extended portions extended forwardly, the extended portion extending in a direction other than a direction of the jaws.

7. A medical apparatus

a grasping section for grasping a living tissue;

a therapeutic part having a blade for applying thermal treatment to the living tissue, the blade being provided in the grasping section on a side thereof which contacts the living tissue; and

a heat insulating part made of a material lower in thermal conductivity than the blade, the heat insulating part being disposed between the grasping section and the blade;

wherein the grasping section has a pair of laws that are relatively movable between opened and closed positions and the pair of jaws respectively have extended portions extended forwardly such that, a gap occurs between the extended portions of the pair of jaws when the pair of jaws are in the closed position.