Bone and tissue resection devices and methods

Patent metadata

Field	Value
Publication number	US-12262897-B2
Application number	US-202217850990-A
Country	US
Kind code	B2
Filing date	Jun 27, 2022
Priority date	Apr 22, 2019
Publication date	Apr 1, 2025
Grant date	Apr 1, 2025

Abstract

Embodiments of bone and tissue resection devices are disclosed herein. In one embodiment, a device can include a blade having a distal cutting edge configured to perform a cutting action that produces a plug or core from a media being cut by the cutting edge, a drive mechanism arranged to transfer an oscillating force to the cutting edge for oscillating the cutting edge, a shield positioned to block contact with a portion of the cutting edge, and a depth adjustment mechanism configured to translate the cutting edge along a proximal-distal axis of the shield to adjust an axial position of the cutting edge relative to the shield.

First claim

What is claimed is:

1. A bone and tissue resection device, comprising:
a blade having a distal cutting edge configured to perform a cutting action that produces a plug or core from a media being cut by the cutting edge;
a drive mechanism arranged to transfer an oscillating force to the cutting edge for oscillating the cutting edge, the drive mechanism comprising:
an input shaft configured to continuously rotate about a first central axis, the input shaft defining an eccentric section with a second central axis that is offset from the first central axis;
an oscillating shaft offset from the input shaft and configured to rotationally oscillate about a third central axis, the oscillating shaft comprising a bore extending perpendicular to the third central axis;
a connector rotatably coupled around the eccentric section, the connector comprising a sleeve extending perpendicular to the second central axis;
a pin extending perpendicular to the third central axis, the pin having a first end disposed within the bore of the oscillating shaft and a second end disposed within the sleeve of the connector;

a shield positioned to block contact with a portion of the cutting edge; and
a depth adjustment mechanism configured to translate the cutting edge along a proximal-distal axis of the shield to adjust an axial position of the cutting edge relative to the shield.

2. The bone and tissue resection device of claim 1 , wherein the drive mechanism is configured to produce an oscillating axial motion of the cutting edge along a proximal-distal axis of the cutting edge.

3. The bone and tissue resection device of claim 2 , wherein the drive mechanism comprises a cam mechanism configured to produce the oscillating axial motion of the cutting edge.

4. The device of claim 2 , wherein the drive mechanism comprises a piezoelectric mechanism configured to produce the oscillating axial motion of the cutting edge.

5. The bone and tissue resection device of claim 1 , wherein the oscillating force causes oscillation of the cutting edge around a proximal-distal axis of the cutting edge.

6. The bone and tissue resection device of claim 1 , wherein the oscillating force causes oscillation of the cutting edge around a proximal-distal axis of the cutting edge, and wherein the drive mechanism is configured to produce an oscillating axial motion of the cutting edge along the proximal-distal axis of the cutting edge while the cutting edge oscillates around the proximal-distal axis of the cutting edge.

7. The bone and tissue resection device of claim 1 , wherein the cutting edge defines a crescentic shape such that the plug or core of the media being cut can be extracted through an open side of the blade.

8. The bone and tissue resection device of claim 1 , wherein the cutting edge defines a shape matching an implant, such that the plug or core cut from a media clears a path for implantation of the implant in the media.

9. The bone and tissue resection device of claim 1 , wherein the shield comprises a closed distal end configured to prevent contact with the cutting edge.

10. The bone and tissue resection device of claim 1 , wherein the shield comprises an open distal end configured to enable the blade to be inserted from the distal end into the drive mechanism.

11. The bone and tissue resection device of claim 1 , wherein the shield defines one or more openings located radially from the cutting edge to expose the cutting edge.

12. The bone and tissue resection device of claim 1 , wherein the cutting edge defines a crescent shape and the blade defines a concave surface and a convex surface opposite the concave surface, and wherein the shield defines an opening radially to the convex surface of the blade and a closed region radial to the concave surface, wherein the opening of the shield enables a user to view the blade and the closed region contains media resected by the cutting edge.

13. The bone and tissue resection device of claim 12 , wherein the cutting edge defines a crescent shape the blade defines a concave surface and a convex surface opposite the concave surface, and wherein the shield defines a first opening radial to the convex surface of the blade and a second opening radial to the concave surface of the blade, and wherein the shield defines one or more posts separating the two openings, the one or more posts extending to a distal end of the shield.

14. The bone and tissue resection device of claim 13 , wherein the shield comprises a protrusion extending towards the concave surface of the blade for extracting material from the concave surface of the blade when the blade is translated in a proximal direction by the depth adjustment mechanism after being driven distally to cut the material.

15. The bone and tissue resection device of claim 1 , wherein the depth adjustment mechanism is configured to adjust the axial position of the cutting edge with respect to the shield without adjusting the axial position of the drive mechanism with respect to the shield.

16. The device of claim 1 , wherein the depth adjustment mechanism is configured to adjust the position of the cutting edge by translating the drive mechanism along the proximal-distal axis of the shield.

17. The bone and tissue resection device of claim 1 , comprising a handle, and wherein the depth adjustment mechanism is configured to be operated by a user via the handle, wherein, when a user applies a force to the handle, the depth adjustment mechanism transfers the force from the handle to the blade to adjust the position of the cutting edge.

18. The bone and tissue resection device of claim 1 , wherein the depth adjustment mechanism comprises a powered mechanism operable by a user to adjust the position of the cutting edge relative to the shield.

19. The bone and tissue resection device of claim 1 , wherein the blade is coupled to the oscillating shaft.

20. The bone and tissue resection device of claim 1 , wherein the input shaft further comprises a counter weight configured to balance rotation of the eccentric section about the first central axis.

21. The bone and tissue resection device of claim 1 , further comprising a bearing disposed around the input shaft.

22. The bone and tissue resection device of claim 1 , further comprising a bearing disposed around the oscillating shaft.

23. The bone and tissue resection device of claim 1 , further comprising a collet formed at a distal end of the oscillating shaft, the collet including a plurality of arms extending distally around a central axis of the oscillating shaft.

24. The bone and tissue resection device of claim 1 , wherein the shield is configured to detect nerves within a path of the cutting edge using EMG or MMG.

25. The bone and tissue resection device of claim 1 , wherein the shield is able to be navigated to enable alignment of a cut area of the cutting edge.

26. The bone and tissue resection device of claim 1 , wherein the pin is fixedly coupled within the bore of the oscillating shaft and slidably disposed within the sleeve of the connector.

27. The bone and tissue resection device of claim 1 , wherein the pin is slidably disposed within the bore of the oscillating shaft and fixedly disposed within the sleeve of the connector.

Assignees

• Medos Int Sarl

Inventors

• Bornhoft Stephen
• Voellmicke John C
• Buehlmann Eric
• Lomeli Roman
• Gamache Thomas
• Selover Katherine
• Enck Duane Jeffrey

Classifications

• A61B2017/00402

  Piezo electric actuators · CPC title

• A61B2017/00539

  hydraulically · CPC title

• A61B2017/00407

  Ratchet means · CPC title

• A61B2017/00544

  pneumatically · CPC title

• A61B17/1637

  Hollow drills or saws producing a curved cut, e.g. cylindrical (A61B10/025, A61B17/1695 take precedence) · CPC title