Ultrasonic instrument

• US 20040147945A1
• Filed: 09/08/2003
• Published: 07/29/2004
• Est. Priority Date: 09/09/2002
• Status: Abandoned Application

• Current Assignee: Berchtold Holding Gmbh (Stryker Corporation)
• Original Assignee: Berchtold Holding Gmbh (Stryker Corporation)
• Inventors: Fritzsch, Gernod
• Application Number:
  US10/658,103
• Publication Number:
  US 20040147945A1
• Time in Patent Office: Days
• US Class Current: 606/169
• CPC Class Codes: A61B 17/320016 Endoscopic cutting instruments, e.g. arthroscopes, resectoscopes A61B10/0233, A61B17/29, A61B17/3207 take precedence
• CPC Class Codes: A61B 17/320092 with additional movable means for clamping or cutting tissue, e.g. with a pivoting jaw
• CPC Class Codes: A61B 2017/320069 for ablating tissue
• CPC Class Codes: A61B 2017/320078 Tissue manipulating surface
• CPC Class Codes: A61B 2017/320093 additional movable means performing cutting operation
• CPC Class Codes: A61B 2017/320095 with sealing or cauterizing means

Abstract

A surgical ultrasonic instrument has a housing with an ultrasonic transducer, with a shaft being connected to the housing with an application arrangement being provided at its distal end. The application arrangement includes a working element driven in an oscillating manner by the ultrasonic transducer and a fixed position working element between which a working space is formed for the reception of tissue.

Claims

1. A surgical ultrasonic instrument comprising

a housing (10) which has an ultrasonic transducer (12),

a shaft (16) connected to the housing (10) and having an application arrangement provided at its distal end,

with the application arrangement having a working element (18, 18′

, 18″

) driven by the ultrasonic transducer (12) in an oscillating manner in the axial direction of the shaft and a working element (20, ‘

20’

, 20″

) with a fixed position in the axial direction, with the fixed position working element (20, 20′

, 20″

) being immovably connected to the shaft (16), and

the fixed position working element (18, 20;

18″

) and the driven working element (20′

, 18″

, 20″

) forming a working space (F) between them which tapers in the proximal direction and which serves for the reception of body tissue in order to coagulate it and/or to cut it.

2. An instrument in accordance with claim 1, characterized in that the fixed position working element (20, 20′

, 20″

) is part of a protective sleeve (24).

3. An instrument in accordance with claim 1, characterized in that the movable working element (18, 18′

, 18″

) emerges from an end face opening provided in the fixed position working element (20, 20′

, 20″

).

4. An instrument in accordance with claim 1, characterized in that the fixed position working element (20, 20′

, 20″

) has an end face (28, 28′

, 28″

) extending obliquely to the axial direction and/or has an end face (28, 28″

) which is planar overall.

5. An instrument in accordance with claim 1, characterized in that the fixed position working element (20, 20′

, 20″

) and the movable working element (18, 18′

, 18″

) are substantially of the same length at the distal end in the axial direction.

6. An instrument in accordance with claim 1, characterized in that the fixed position working element (20′

) has an end face (28) which is at least partly curved and/or has an end face (28) which has differently inclined and/or curved sections (a, b, c) relative to the longitudinal axis of the instrument.

7. An instrument in accordance with claim 1, characterized in that the fixed position working element (20, 20′

, 20″

) tapers laterally in comparison with the shaft (24).

8. An instrument in accordance with claim 1, characterized in that the movable working element (18, 18′

) is rotationally symmetrical.

9. An instrument in accordance with claim 1, characterized in that the movable working element (18) tapers conically in the distal direction.

10. An instrument in accordance with claim 1, characterized in that a working element (18″

) is adjustable about its longitudinal axis relative to the other working element (20″

) and has at least two differently designed working surfaces; and

/or in that the movable working element (18, 18′

, 18″

) and the fixed position working element (20, 20′

, 20″

) are releasably connected to one another.