SURGICAL IMPACT TOOL

• US 20130261681A1
• Filed: 03/30/2012
• Published: 10/03/2013
• Est. Priority Date: 03/30/2012
• Status: Active Grant

• Current Assignee: Depuy Synthes Products Incorporated (Johnson & Johnson)
• Original Assignee: DePuy Mitek Incorporated (Johnson & Johnson)
• Inventors: Bittenson, Steven N.
• Granted Patent: US 10,149,711 B2
• Time in Patent Office: Days
• US Class Current: 606/86.R
• CPC Class Codes: A61B 17/1604 Chisels; Rongeurs; Punches; Stamps
• CPC Class Codes: A61B 17/92 Impactors or extractors, e.g. for removing intramedullary devices insertion or extraction of artificial joints A61F2/4603
• CPC Class Codes: A61F 2/4603 for insertion or extraction of endoprosthetic joints or of accessories thereof
• CPC Class Codes: A61F 2002/4681 by applying mechanical shocks, e.g. by hammering
• CPC Class Codes: A61F 2002/469 electrical

Abstract

A surgical impact tool comprises an electromagnetic impactor hermetically sealed within a sterilizable housing having one or more external mechanical coupling for transmitting an impact to an object external to the tool. The housing also contains an energy storage medium rechargeable through the hermetic seal, and electronic controls operable through the hermetic seal.

Claims

1. A surgical hammer comprising;

a housing having an exterior surface and an interior surface, a wall comprising a hermetic seal therebetween and defining an interior volume, the housing having a distal end and a proximal end;

an electrically powered impactor disposed within the interior volume and configured for generating an impact at an impact-receiving portion of the interior surface;

a surgical impact head coupled to the housing exterior surface adjacent the impact-receiving portion of the interior surface whereby to receive the impact;

an electrical energy storage unit disposed within the interior volume and rechargeable from outside the housing without violating the hermetic seal; and

a controller disposed within the interior volume and configured for delivering electrical energy from the storage unit to the impactor for generating the impact upon receipt of a control signal, the controller configured to receive the control signal through the wall without violating the hermetic seal.

2. The surgical hammer according to claim 1 wherein the surgical impact head is releasably coupled to the housing exterior surface.

3. The surgical hammer according to claim 2 wherein the surgical impact head is one of an implant insertion tool, an implant extraction tool and a microfracture pick.

4. The surgical hammer according to claim 1 wherein the housing has a longitudinally extended, generally cylindrical shape between the proximal end and the distal end.

5. The surgical hammer according to claim 4 and further comprising a second surgical impact head at an opposite end of the housing from surgical impact head.

6. The surgical hammer according to claim 1 wherein the wall comprises a substantially continuous metallic envelope about the interior volume.

7. The surgical hammer according to claim 1 wherein the wall comprises one of an optical window and an electrical feedthrough sealed therethrough.

8. The surgical hammer according to claim 1 wherein the storage unit is configured to be recharged wirelessly through the wall, and the controller is configured to receive the control signal wirelessly through the wall.

9. The surgical hammer according to claim 1 wherein the wall can be penetrated by at least one of a magnetic field and a radio frequency electromagnetic field for at least one of recharging the storage unit and receiving the control signal.

10. The surgical hammer according to claim 1 further comprising a transmitter releasably coupled to the exterior surface of the housing and configured to transmit the control signal to the controller.

11. The surgical hammer according to claim 10 wherein the transmitter is disposed in one or more of a sheath about a portion of the device and a handle extending outward from the device.

12. The surgical hammer according to claim 10 wherein the electrical energy storage unit comprises a capacitor.

13. A method for delivering an impact at a desired location in surgical site in a patient, the method comprising:

positioning at the location a surgical hammer comprising an electrically powered impactor in a hermetically sealed housing, and a surgical impact head coupled thereto; and

activating the impactor to deliver an impact through housing to the surgical impact head at the location.

14. A method according to claim 13 wherein the surgical hammer delivers a plurality of periodic impacts at the location.

15. A method according to claim 13 wherein the surgical impact head comprises a microfracture pick and the method comprises the step of creating a microfracture in a bone at the location.

16. The method according to claim 13 wherein the steps of positioning and activating the impactor are performed using a single hand.

17. The method according to claim 13 wherein activating the impactor is performed by wirelessly transmitting a control signal to the impactor through the housing.

18. The method according to claim 13 wherein activating the impactor comprises operating a transmitter releasably coupled externally to the housing.

19. A system for providing an impact to a surgical site in a patient, the system comprising

a hermetically sealed, rechargeable impact tool;

and

a control transmitter configured for transmitting a control signal to operate the tool to deliver one or more impact.

20. The system according to claim 19 further comprising one or more surgical tool bit removably couplable to the impact tool.

21. The system according to claim 19 wherein the control transmitter is releasably couplable to the impact tool.

22. The system according to claim 19 wherein the tool is sterilizable and the control transmitter comprises a single-use sterile package.

23. The system according to claim 21 wherein the impacting tool transmits electrical power to the control transmitter for transmitting the control signal.