Surgical tool

• US 9,078,671 B2
• Filed: 04/17/2008
• Issued: 07/14/2015
• Est. Priority Date: 04/17/2008
• Status: Active Grant

• Current Assignee: Warsaw Orthopedic Incorporated (Medtronic Plc)
• Original Assignee: Warsaw Orthopedic Incorporated (Medtronic Plc)
• Inventors: Beale, Jeff, Taylor, Harold, Brockmeier, Oivind, Judson, Jared Alden, Chapin, Jeffrey R., Proulx, Timothy, Adler, Ari Tao, Robinson, Jason
• Primary Examiner(s): Truong, Kevin T
• Assistant Examiner(s): NELSON, CHRISTINE L
• Application Number:
  US12/104,604
• Publication Number:
  US 20090264940A1
• Time in Patent Office: 2,644 Days
• Field of Search: 606/79, 606/80, 606/81, 606/104, 606/96, 606/86.R, 606/86.A, 173/217, 173/216, 310 47- 50
• US Class Current: 1/1
• CPC Class Codes: A61B 17/162 Chucks or tool parts which are to be held in a chuck
• CPC Class Codes: A61B 17/1624 Drive mechanisms therefor
• CPC Class Codes: A61B 17/1628 Motors; Power supplies
• CPC Class Codes: A61B 17/1671 for the spine
• CPC Class Codes: A61B 17/8875 Screwdrivers, spanners or wrenches
• CPC Class Codes: A61B 2017/00039 Electric or electromagnetic phenomena other than conductivity, e.g. capacity, inductivity, Hall effect
• CPC Class Codes: A61B 2017/00477 Coupling A61B2017/0046 takes precedence
• CPC Class Codes: A61B 2017/00876 magnetic
• CPC Class Codes: A61B 2090/3983 Reference marker arrangements for use with image guided surgery
• CPC Class Codes: A61B 34/20 Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis
• CPC Class Codes: A61B 5/24 Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
• CPC Class Codes: A61B 90/39 Markers, e.g. radio-opaque or breast lesions markers
• CPC Class Codes: B25B 21/00 Portable power-driven screw or nut setting or loosening tools; details or components, e.g. casings, bodies, of portable power-driven tools not particularly related to the operation performed B25F5/00; for mounting or dismounting wheels B60B29/006; Attachments for drilling apparatus serving the same purpose machines B23P19/06
• CPC Class Codes: B25B 21/002 for special purposes
• CPC Class Codes: B25B 23/00 Details of, or accessories for, spanners, wrenches, screwdrivers bolt tensioners B25B29/02
• CPC Class Codes: B25F 5/00 Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for

Abstract

A tool for use during surgery includes a housing including a distal end and a proximal end, a motor disposed within the housing, and an output shaft having a proximal end connected to the motor and a distal end extending from the distal end of the housing. The tool further includes a battery pack contained within the housing, and a passage extending from the distal end to the proximal end of the housing through the output shaft and the battery pack, wherein the passage is defined by an interior surface of the output shaft and a channel through the battery.

Claims

1. A tool for use during surgery comprising:

a housing comprising a distal end and a proximal end,

a motor disposed within the housing;

an output shaft having a proximal end connected to the motor and a distal end;

a battery pack contained within the housing;

a segmented passage comprising a first portion disposed within an interior of the output shaft and a second portion extending through an interior of the battery pack, the first portion extending parallel to the second portion, the first and second portions being axially separated by an opening, and

an assembly configured to select between forward and reverse drive positions, the assembly comprising a sleeve having an inner surface defining a lumen, the lumen having a member rotatably disposed therein, the member comprising a first pin that faces toward the battery pack, the first in being configured to engage openings in an anti-backdrive assembly of the tool, thereby acting as a clutch configured to lock pawls within the anti-backdrive assembly in a particular location, the member comprising an inner surface defining a channel, the output shaft extending through the lumen and the channel.

2. The tool of claim 1, further comprising a sealed compartment, wherein the motor is disposed within the sealed compartment.

3. The tool of claim 1, wherein the passage has a generally circular cross-sectional contour including a diameter of at least about 1 mm.

4. The tool of claim 1, wherein the passage has a length of at least about 10 cm.

5. The tool of claim 1, wherein the passage further comprises an electrically insulating liner extending for a portion of the passage.

6. The tool of claim 1, further comprising a ratcheting mechanism connected to the output shaft.

7. The tool of claim 6, further comprising a switch connected to the housing and electrically connected to the motor, wherein the switch comprises a forward position and a reverse position, wherein the forward position is configured to actuate the motor in a forward direction and the reverse position is configured to actuate the motor in a reverse direction that is a direction opposite of the forward direction.

8. The tool of claim 7, further comprising an anti-backdrive mechanism connected to the output shaft and the housing.

9. The tool of claim 8, wherein the ratchet mechanism is decoupled from the output shaft in the reverse position.

10. The tool of claim 1, wherein the battery pack comprises multiple power cells.

11. The tool of claim 1, further comprising:

a trigger operable with a hand of an operator; and

a failsafe switch connected to the housing, wherein the failsafe switch is simultaneously operable with the trigger with the hand of the operator, and wherein the failsafe switch prevents operation of the motor without the hand of the operator.

12. The tool of claim 11, wherein the failsafe switch is disposed on the surface of the trigger and configured to detect the presence of a user'"'"'s finger operating the trigger.

13. The tool of claim 12, wherein the failsafe switch includes a capacitive member configured to detect the presence of a user at the surface of the failsafe switch.

14. The tool of claim 11, wherein the failsafe switch and the trigger are distinct.

15. The article of claim 14, wherein the trigger is decoupled from the motor and the motor is in an off position when the failsafe switch is disengaged.

16. The tool of claim 1, wherein the first portion is coaxial with the second portion.

17. The tool of claim 1 wherein the member comprises a second pin extending parallel to the first pin and facing toward the batter pack, the second pin being configured to selectively engage openings within the anti-backdrive assembly to engage or disengage ratcheting capabilities of a ratcheting mechanism of the tool.

18. The tool of claim 17, wherein the second pin has a maximum length that is less than that of the first pin.

19. The tool of claim 18, wherein the first pin comprises three pins and the second pin comprises three pins.

20. A surgical tool for implanting devices within the body comprising:

an autoclavable housing comprising a distal end, a proximal end, and a handle extending from the housing between the distal end and the proximal end at an angle to a longitudinal axis of the housing, wherein the housing comprising a sealed portion containing a motor;

a battery pack contained within the housing;

an output shaft extending along the longitudinal axis of the housing and connected to the motor;

a segmented passage comprising a first portion disposed within an interior of the output shaft and a second portion extending through an interior of the battery pack, the first portion extending parallel to the second portion, the first and second portions being axially separated by an opening; and

a ratcheting mechanism connected to the output shaft

an assembly configured to select between forward and reverse drive positions, the assembly comprising a sleeve having an inner surface defining a lumen, the lumen having a member rotatably disposed therein, the member comprising a first pin that faces toward the battery pack, the first in being configured to engage openings in an anti-backdrive assembly of the tool, thereby acting as a clutch configured to lock pawls within the anti-backdrive assembly in a particular location, the member comprising an inner surface defining a channel, the output shaft extending through the lumen and the channel.

21. The tool of claim 20, wherein the sealed portion comprises a first gasket abutting a portion of the housing and a second gasket abutting a second portion of the housing.

22. A surgical tool for implanting devices within the body comprising:

a housing comprising a distal end, a proximal end opposite of the distal end, and a housing length defined as the distance between the proximal end and the distal end;

a battery pack contained within the housing;

a motor;

an output shaft having a proximal end and a distal end opposite the proximal end, wherein the proximal end is connected to the motor;

a segmented passage comprising a first portion disposed within an interior of the output shaft and a second portion extending through an interior of the battery pack, the first portion extending parallel to the second portion, the first and second portions being axially separated by an opening;

a chuck having a distal end and a proximal end opposite the distal end connected to the distal end of the output shaft; and

a handle connected to the housing and extending at an angle from the housing between the distal end and the proximal end, the handle having a front surface including a trigger and a back surface opposite the front surface, wherein a cradle distance defined as a distance between the back surface and the proximal end of the chuck is not greater than about 50% of the housing length

an assembly configured to select between forward and reverse drive positions, the assembly comprising a sleeve having an inner surface defining a lumen, the lumen having a member rotatably disposed therein, the member comprising a first pin that faces toward the battery pack, the first pin being configured to engage openings in an anti-backdrive assembly of the tool, thereby acting as a clutch configured to lock pawls within the anti-backdrive assembly in a particular location, the member comprising an inner surface defining a channel, the output shaft extending through the lumen and the channel.

23. The tool of claim 22, wherein the cradle distance is within a range between about 30% and about 45% of the length of the housing.

24. The tool of claim 22, wherein the handle is closer to the distal end of the housing than the proximal end of the housing.