Surgical saw with sensing technology for determining cut through of bone and depth of the saw blade during surgery

• US 9,468,445 B2
• Filed: 02/04/2015
• Issued: 10/18/2016
• Est. Priority Date: 11/08/2013
• Status: Active Grant

• Current Assignee: McGinley Engineered Solutions, LLC
• Original Assignee: McGinley Engineered Solutions, LLC
• Inventors: McGinley, Joseph C., Fisher, Lawson, Mishra, Devjeet, McCrea, Jim, Bliven, Brian, Leugers, Martin
• Primary Examiner(s): Yang, Andrew
• Application Number:
  US14/614,107
• Publication Number:
  US 20150148805A1
• Time in Patent Office: 622 Days
• US Class Current: 1/1
• CPC Class Codes: A61B 17/142 with reciprocating saw blades, e.g. with cutting edges at the distal end of the saw blades
• CPC Class Codes: A61B 17/149 Chain, wire or band saws
• CPC Class Codes: A61B 17/15 Guides therefor arrangements for guiding straight saw blades in general B23D51/025
• CPC Class Codes: A61B 17/1615 Drill bits, i.e. rotating tools extending from a handpiece to contact the worked material
• 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 17/320758 with a rotating cutting instrument, e.g. motor driven A61B17/320725, A61B17/32075 and A61B17/320783 take precedence; for removing intra-ocular material A61F9/00763; endoscopic rotatable cutting instruments A61B17/32002
• CPC Class Codes: A61B 17/3213 with detachable blades
• CPC Class Codes: A61B 2017/00017 Electrical control of surgical instruments
• CPC Class Codes: A61B 2017/00022 Sensing or detecting at the treatment site
• CPC Class Codes: A61B 2017/00075 Motion
• CPC Class Codes: A61B 2090/061 for measuring dimensions, e.g. length
• CPC Class Codes: A61B 2090/062 penetration depth
• CPC Class Codes: A61B 2090/064 for measuring force, pressure or mechanical tension
• CPC Class Codes: A61B 2090/0812 indicating loosening or shifting of parts of an instrument, signaling maladjustment of parts
• CPC Class Codes: A61B 2090/0813 Accessories designed for easy sterilising, i.e. re-usable
• CPC Class Codes: A61B 2090/0814 Preventing re-use
• CPC Class Codes: A61L 2/07 Steam
• CPC Class Codes: B08B 3/04 Cleaning involving contact with liquid
• CPC Class Codes: B08B 3/08 the liquid having chemical or dissolving effect substances used, see the relevant classes

Abstract

Sensing technology methods related thereto for determining cut through of bone and a depth of penetration of a working portion of a surgical instrument (e.g., an oscillating saw blade in a cut). A first sensor outputs a first signal representative of a displacement of the cutting edge of the saw blade in the cut. A second sensor outputs a second signal representative of a force applied to the cutting edge of the saw blade. As such, monitoring the first and/or second sensor may allow for the saw to be stopped upon completion of a cut (e.g., when the saw passes completely through a medium to be cut or upon reaching a predetermined depth for the cut).

Claims

1. A saw blade assembly for use in a medical saw for single use applications, the saw blade comprising:

a cutting edge disposed at a distal end of the saw blade;

a shank disposed adjacent to a proximal end of the saw blade;

a blade member extending between the distal end and the proximal end;

a bushing configured to be located adjacent to at least a portion of the blade member, wherein the bushing is constrainedly moveable relative to the blade member in a direction corresponding to the length of the blade member; and

a destructible portion that is at least partially destructible during a cleaning process, wherein the destructible portion is meltable.

2. The saw blade assembly according to claim 1, wherein a melting temperature of the destructible portion is greater than an operating temperature of the saw blade and less than an autoclave temperature.

3. The saw blade assembly according to claim 2, wherein the melting temperature of the destructible portion is not less than about 60°

C. and not greater than about 110°

C.

4. The saw blade assembly according to claim 1, wherein the destructible portion comprises a proximal end portion of the shank.

5. The saw blade assembly according to claim 4, wherein the destructible portion comprises at least a portion of an engagement feature for engagement of the shank by a chuck.

6. The saw blade assembly according to claim 5, wherein the destructible portion, after having been exposed to a cleaning process, is not registerable with respect to the chuck.

7. The saw blade assembly according to claim 1, wherein the destructible portion comprises a portion of the bushing.

8. The saw blade assembly according to claim 7, wherein the destructible portion comprises an engagement portion of the bushing.

9. The saw blade assembly according to claim 7, wherein the destructible portion comprises a portion of the bushing constraining the bushing to the blade member, wherein upon destruction of the destructible portion, the bushing is not constrained to the blade member.

10. A method for a saw blade assembly for use in a medical saw for single use applications, comprising:

exposing the saw blade to a cleaning process; and

degrading at least a portion of a destructible portion of the saw blade assembly in response to the exposing.

11. The method according to claim 10, wherein the exposing comprises autoclaving the saw blade.

12. The method according to claim 11, wherein the degrading comprises melting at least a portion of the destructible portion in response to the autoclaving.

13. The method according to claim 12, wherein the melting occurs at a temperature of not less than about 60°

C. and not greater than about 110°

C.

14. The method according to claim 10, wherein the exposing comprises applying a cleaning chemical to the saw blade assembly and the degrading comprises removing of at least a portion of the destructible portion in response to applying the cleaning chemical.

15. The method according to claim 10, wherein the degrading results in changing a shape of a shank of the saw blade.

16. The method according to claim 15, wherein the degrading comprises removing at least a portion of the destructible portion at a shank of the saw blade.

17. The method according to claim 16, wherein the portion of the destructible portion removed comprises at least a portion of an engagement feature for engagement of the shank by a chuck.

18. The method according to claim 12, wherein the degrading results in reducing the registration of the shank with respect to a chuck of a saw.

19. The method according to claim 10 wherein the degrading comprises removing at least a portion of the destructible portion at the bushing.

20. The method according to claim 19, wherein the degrading comprises destroying an engagement portion of the bushing.

21. The method according to claim 20, wherein the degrading comprises destroying a portion of the bushing constraining the bushing to the blade member, wherein upon the destroying of the destructible portion, the bushing is not constrained to the blade member.