Balanced ultrasonic end effector

• US 8,617,194 B2
• Filed: 09/01/2011
• Issued: 12/31/2013
• Est. Priority Date: 06/29/1998
• Status: Expired due to Term

• Current Assignee: Ethicon Endo-Surgery, Inc. (Johnson & Johnson)
• Original Assignee: Ethicon Endo-Surgery, Inc. (Johnson & Johnson)
• Inventors: Beaupre, Jean M.
• Primary Examiner(s): Philogene, Pedro
• Application Number:
  US13/223,357
• Publication Number:
  US 20110319918A1
• Time in Patent Office: 852 Days
• Field of Search: 606/169, 606/159, 606/167, 606/166, 606/170, 606/171, 604/22, 427/2.28
• US Class Current: 606/169
• CPC Class Codes: A61B 17/320068 using mechanical vibrations, e.g. ultrasonic A61B17/22012 takes precedence; dental tooth drilling devices operated by vibration A61C3/03; removing intra-ocular material using mechanical vibrations A61F9/00745
• CPC Class Codes: A61B 2017/320072 Working tips with special features, e.g. extending parts
• CPC Class Codes: A61B 2017/320077 double edge blade, e.g. reciprocating
• CPC Class Codes: A61N 7/00 Ultrasound therapy lithotripsy A61B17/22, A61B17/225; massage using supersonic vibration A61H23/00 ; using ultrasound for introducing media into the body A61M37/0092

Abstract

A balanced ultrasonic surgical instrument according to the present invention includes an ultrasonic transmission rod which is connected to a blade or end effector by a balance portion, which includes first and second balance asymmetries designed to compensate for the imbalances induced by the blade.

Claims

1. An ultrasonic transmission assembly comprising:

a) an ultrasonic transmission waveguide having a proximal end and a distal end; and

b) an ultrasonic end effector having a proximal end connected to the distal end of the ultrasonic transmission waveguide and a most distal end, the ultrasonic end effector comprising;

i) a treatment region extending from the most distal end to a point proximal to the most distal end and having at least two functional asymmetries; and

ii) a balance region extending from a node point at said ultrasonic transmission waveguide to the point proximal to the most distal end.

2. The ultrasonic transmission assembly of claim 1, wherein the node point is the most distal node.

3. The ultrasonic transmission assembly of claim 1, wherein each of the at least two functional asymmetries lie in separate planes.

4. The ultrasonic transmission assembly of claim 1, wherein the treatment region and balance region are bisected by a plane of symmetry, wherein the treatment region is substantially symmetrical with respect to the plane of symmetry.

5. The ultrasonic transmission assembly of claim 1, wherein the most distal end is blunt.

6. The ultrasonic transmission assembly of claim 1, wherein the most distal end is sharp.

7. The ultrasonic transmission assembly of claim 1, wherein the balance region comprises a first balance asymmetry.

8. The ultrasonic transmission assembly of claim 7, wherein the balance region comprises a second balance asymmetry.

9. The ultrasonic transmission assembly of claim 1, wherein the treatment region comprises a concave top surface and a convex bottom surface.

10. The ultrasonic transmission assembly of claim 8, wherein the first and second balance asymmetries are positioned to counter torque created by the treatment region.

11. The ultrasonic transmission assembly of claim 1, wherein a balance ratio of the transmission waveguide is less than 1:

10.

12. The ultrasonic transmission assembly of claim 1, wherein the balance ratio of the transmission waveguide is less than 1:

200.