Surgical Instrument

• US 20130123800A1
• Filed: 11/09/2012
• Published: 05/16/2013
• Est. Priority Date: 11/11/2011
• Status: Active Grant

• Current Assignee: Karl Storz Se & Co. Kg
• Original Assignee: Karl Storz Se & Co. Kg
• Inventors: Wagner, Sebastian, Leroy, Joel Jules Louis, Rollet, Benjamin
• Granted Patent: US 10,022,111 B2
• Time in Patent Office: Days
• US Class Current: 606/130
• CPC Class Codes: A61B 17/00234 for minimally invasive surgery A61B17/0218, A61B17/0469, A61B17/12013, A61B17/1285, A61B17/29, A61B17/320016 take precedence
• CPC Class Codes: A61B 17/29 Forceps for use in minimally invasive surgery
• CPC Class Codes: A61B 2017/0046 with a releasable handle; with handle and operating part separable for prosthetic joint-implanting tools A61F2/4603
• CPC Class Codes: A61B 2017/00991 Telescopic means
• CPC Class Codes: A61B 2017/2901 Details of shaft

Abstract

An endoscopic surgical instrument with an elongate shaft, a surgical tool arranged at a distal end of the shaft for conducting surgical manipulations and a handle arranged at a proximal end of the shaft for actuating the surgical tool. The shaft has an elongate shaft tube and an elongate actuation rod arranged movably within the shaft tube, the tool and the handle both being connected to the shaft tube and the actuating rod such that the tool can be actuated by the handle through a motion of the actuating rod relative to the shaft tube.

Claims

1. A surgical instrument comprising an elongate shaft, a surgical tool arranged at a distal end of the shaft for conducting surgical manipulations and a handle arranged at a proximal end of the shaft for actuating the surgical tool, the shaft comprising an elongate shaft tube and an elongate actuation rod arranged movably within the shaft tube, the tool and the handle both being connected to the shaft tube and the actuating rod such that the tool can be actuated by the handle through a motion of the actuating rod relative to the shaft tube, characterized in that the shaft tube comprises an elongate outer shaft tube and an elongate inner shaft tube that is at least partly arranged within the outer shaft tube, the outer shaft tube being displaceable in a longitudinal direction with respect to the inner shaft tube and being lockable with respect to the inner shaft tube in a multiplicity of longitudinal positions, and that the actuation rod comprises an elongate actuation rod tube and an elongate actuation rod core at least partly arranged within the actuation rod tube, the actuation rod tube being displaceable in a longitudinal direction relative to the actuation rod core and being lockable with respect to the actuation rod core in a multiplicity of longitudinal positions.

2. The surgical instrument according to claim 1, characterized in that the outer shaft tube is lockable with respect to the inner shaft tube by a bayonet-type lock.

3. The surgical instrument according to claim 1, characterized in that the actuation rod tube, is lockable with respect to the actuation rod core by a bayonet-type lock.

4. The surgical instrument according to claim 2, characterized in that the bayonet-type lock is a threaded bayonet lock.

5. The surgical instrument according to claim 2, characterized in that the bayonet-type lock is blocked by at least one elongate blocking element.

6. The surgical instrument according to claim 1, characterized in that the outer shaft tube comprises a proximal and a distal shaft section, the proximal shaft section and the inner shaft tube comprising ratchet means permitting moving the proximal shaft section in a distal direction over the inner shaft tube and the distal shaft section and the inner shaft tube comprising second ratchet means permitting moving the distal shaft section in a proximal direction over the inner shaft tube, each ratchet means blocking movement in a respective opposite direction.

7. The surgical instrument according to claim 1, characterized in that the actuation rod tube comprises a proximal rod section and a distal rod section, the proximal rod section and the actuation rod core comprising ratchet means permitting moving the proximal rod section in a distal direction over the actuation rod core and the distal rod section and the actuation rod core comprising second ratchet means permitting moving the distal rod section in a proximal direction over the actuation rod core, each ratchet means blocking movement in a respective opposite direction.

8. The surgical instrument according to claim 6, characterized in that the outer and inner shaft tubes and/or the actuation rod tube and the actuation rod core, respectively, are rotatable with respect to each other for releasing the ratchet means.

9. The surgical instrument according to claim 8, characterized in that the rotation of the outer and inner shaft tubes is blocked by a cover tube and/or the rotation of the actuation rod tube and the actuation rod core relative to each other is blocked by the inner shaft rube respectively.

10. The surgical instrument according to claim 1, characterized in that the outer shaft tube is connectable to a clamping ring, the clamping ring comprising non-parallel cylindrical outer and inner surfaces such that the clamping ring frictionally engages with the inner shaft tube when its outer surface is biased into a coaxial orientation by a cover tube enclosing the outer shaft tube.

11. The surgical instrument according to claim 1, characterized in that the actuation rod tube is connectable to a clamping ring, the clamping ring comprising non-parallel cylindrical outer and inner surfaces such that the clamping ring frictionally engages with the actuation rod core when its outer surface is biased into a coaxial orientation by the inner shaft tube.

12. The surgical instrument according to claim 10, characterized in that the clamping ring is connected to the outer shaft tube and/or the actuation rod tube by tooth means, respectively.

13. The surgical instrument according to claim 1, characterized in that the outer shaft tube comprises a multiplicity of clamping elements and the inner shaft tube comprises a multiplicity of windows or recesses for engaging with the at least one clamping element.

14. The surgical instrument according to claim 1, characterized in that the actuation rod tube comprises a multiplicity of clamping elements and the actuation rod core comprises a multiplicity of recesses for engaging with the at least one clamping element.

15. The surgical instrument according to claim 13, characterized in that the at least one clamping element engaging with a window or recess is blocked by a cover tube enclosing the outer shaft tube and/or at least one clamping element engaging with a recess is blocked by the actuation rod tube, respectively.