Electrosurgical counter and lockout mechanism

• US 7,124,932 B2
• Filed: 06/21/2004
• Issued: 10/24/2006
• Est. Priority Date: 02/25/2004
• Status: Active Grant

• Current Assignee: Megadyne Medical Products Incorporated (Johnson & Johnson)
• Original Assignee: Megadyne Medical Products Incorporated (Johnson & Johnson)
• Inventors: Miller, William, Isaacson, James D., Borgmeier, Paul R.
• Primary Examiner(s): Frech, Karl D.
• Application Number:
  US10/873,380
• Publication Number:
  US 20050183656A1
• Time in Patent Office: 855 Days
• Field of Search: 235/79, 235/117.R, 235/117.A, 235/144.SM, 235/144.SP, 235/91.ALL, 235/78.R
• US Class Current: 235/144.0SM
• CPC Class Codes: A61B 18/12 by passing a current through the tissue to be heated, e.g. high-frequency current
• CPC Class Codes: A61B 18/14 Probes or electrodes therefor
• CPC Class Codes: A61B 2018/00178 Electrical connectors
• CPC Class Codes: A61B 2018/00988 Means for storing information, e.g. calibration constants, or for preventing excessive use, e.g. usage, service life counter
• CPC Class Codes: A61B 2090/0813 Accessories designed for easy sterilising, i.e. re-usable
• CPC Class Codes: A61L 2/26 Accessories or devices or components used for biocidal treatment
• CPC Class Codes: G01K 1/02 Means for indicating or recording specially adapted for thermometers

Abstract

An electrosurgical apparatus having a counter/lockout mechanism that monitors the number of sterilization/use cycles the electrosurgical apparatus undergoes and indicates the number of sterilization/use cycles that have actually been performed. The counter/lockout mechanism includes a temperature actuated element actuated in response to each sterilization cycle and a mechanically actuated element in response to a use cycle to effectuate a change of one or a plurality of indicia. The counter/lockout mechanism causes a single increment or decrement for each sterilization/use cycle that has been completed while also impeding use of the electrosurgical apparatus when the electrosurgical apparatus has undergone a predetermined number of sterilization/use cycles. In one embodiment, the distance of movement of the mechanically actuated element when fully actuated is greater than the distance the indicator moves when illustrating a change in the number of remaining uses.

Claims

1. A counter to track the number of sterilization/use cycles an electrosurgical apparatus has undergone, the counter comprising:

a means for detecting a temperature above ambient associated with a sterilization cycle, the means for detecting a temperature above ambient comprising a temperature actuated member, the temperature actuated member comprising a shape memory;

means for detecting a use cycle of the apparatus, the means for detecting a temperature above ambient and the means for detecting a use cycle combining to effectuate a change of one or a plurality of indicia to show that a single sterilization/use cycle has been completed for each sterilization/use cycle undergone.

2. The electrosurgical counter of claim 1, further comprising an indicator having a plurality of indicia for illustrating changes in the number of sterilization/use cycles completed.

3. The electrosurgical counter of claim 1, further comprising an actuator.

4. The electrosurgical counter of claim 3, wherein the actuator is linked to the indicator, means for detecting a temperature above ambient, and the means for detecting a use cycle.

5. The electrosurgical counter of claim 4, wherein the actuator causes a change in the one or plurality of indicia to illustrate to the user changes in the number of sterilization/use cycles undergone or remaining.

6. The electrosurgical counter of claim 5, wherein the actuator moves in a first direction when the means for detecting a temperature above ambient is actuated.

7. The electrosurgical counter of claim 6, wherein the actuator moves in a second direction when the means for detecting a use cycle is actuated.

8. The electrosurgical counter of claim 7, wherein the actuator moves the indicator such that the indicator shows that a single sterilization/use cycle has been completed subsequent to moving in the first direction and the second direction subsequent to a completed sterilization/use cycle.

9. An electrosurgical counter to track the number of sterilization/use cycles an electrosurgical apparatus has undergone, the electrosurgical counter comprising:

an indicator having a plurality of indicia for illustrating changes in the number of sterilization/use cycles completed;

a temperature actuated element linked to the indicator;

a mechanically actuated element linked to the indicator, the mechanically actuated element comprising a plunger and being actuated during a sterilization cycle such that the plunger is biased into the electrosurgical apparatus during a use cycle, the temperature actuated element and the mechanically actuated element effectuating a change of the indicia such that the indicator shows that a single sterilization/use cycle has been completed for each sterilization/use cycle undergone.

10. The electrosurgical counter of claim 9, wherein the temperature actuated element is actuated during a sterilization cycle.

11. The electrosurgical counter of claim 9, wherein the plunger is depressed and is biased into the electrosurgical apparatus when the electrosurgical apparatus is plugged into an electrosurgical power source.

12. The electrosurgical counter of claim 9, wherein the indicator illustrates the number of remaining uses for the electrosurgical apparatus.

13. The electrosurgical counter of claim 9, wherein the indicator illustrates the number of sterilization/use cycles the electrosurgical apparatus has undergone.

14. An electrosurgical counter to track the number of sterilization/use cycles an electrosurgical apparatus has undergone, the electrosurgical counter comprising:

an indicator having one or a plurality of indicia for illustrating changes in the number of sterilization/use cycles completed;

a temperature actuated element linked to the indicator; and

a mechanically actuated element linked to the indicator, the temperature actuated element and the mechanically actuated element effectuating a change of the one or plurality of indicia such that the indicator shows that a single sterilization/use cycle has been completed for each sterilization/use cycle undergone, wherein the one or plurality of indicia move relative to the indicator.

15. An electrosurgical counter to track the number of sterilization/use cycles an electrosurgical apparatus has undergone, the electrosurgical counter comprising:

an indicator having one or a plurality of indicia for illustrating changes in the number of sterilization/use cycles completed;

a temperature actuated element linked to the indicator;

a mechanically actuated element linked to the indicator, the temperature actuated element and the mechanically actuated element effectuating a change of the one or plurality of indicia such that the indicator shows that a single sterilization/use cycle has been completed for each sterilization/use cycle undergone wherein the one or plurality of indicia does not move relative to the indicator and wherein the indicator moves to illustrate a different one of the indicia to the user.

16. An electrosurgical sterilization/use counter, comprising:

an indicator having a plurality of indicia for illustrating the number of remaining uses before the electrosurgical apparatus should be discarded;

an actuator linked to the indicator;

a temperature actuated element linked to the actuator and being actuated in response to a sterilization cycle, the temperature actuated element moving the actuator in a first direction when actuated, the temperature actuated element pushes the actuator to move the actuator in the first direction wherein the temperature actuated element comprises a shape memory alloy; and

a mechanically actuated element linked to the actuator, the mechanically actuated element moving the actuator in a second direction, the temperature actuated element and the mechanically actuated element causing the actuator to effect a change of indicia to show the number of remaining uses subsequent to a sterilization/use cycle.

17. The electrosurgical sterilization/use counter of claim 16, wherein the shape memory alloy is in a curved configuration during use of the electrosurgical apparatus.

18. The electrosurgical sterilization/use counter of claim 17, wherein the shape memory alloy is in a stiffened substantially linear configuration during at least a portion of a sterilization cycle.

19. The electrosurgical sterilization/use counter of claim 18, wherein the shape memory alloy pushes the actuator to cause movement of the indicator.

20. An electrosurgical lockout mechanism for use with an electrosurgical apparatus configured to be discarded after a predetermined number of sterilization/use cycles, the electrosurgical lockout mechanism comprising:

an indicator having a plurality of indicia for showing the number of remaining uses before the electrosurgical apparatus should be discarded;

an actuator configured to engage the indicator to illustrate a different one of the indicia to show the number of remaining uses;

a temperature actuated element linked to the actuator, the temperature actuated element being adapted to move the actuator in a first direction;

a mechanically actuated element linked to the actuator, the mechanically actuated element adapted to move the actuator in a second direction; and

a lockout mechanism linked to the actuator the lockout mechanism comprising a mechanical plunger, the lockout mechanism adapted to be utilized with the temperature actuated element and the mechanically actuated element, wherein the lockout mechanism is also adapted to prevent use of the electrosurgical apparatus when the electrosurgical apparatus has undergone a predetermined number of sterilization/use cycles.

21. The electrosurgical lockout mechanism of claim 20, wherein the mechanical plunger comprises the mechanically actuated element.

22. The electrosurgical lockout mechanism of claim 21, wherein the mechanical plunger prevents a user from connecting the electrosurgical apparatus to an electrosurgical power source.

23. The electrosurgical lockout mechanism of claim 20, wherein the lockout mechanism is utilized with a modular electrosurgical apparatus.

24. An electrosurgical lockout mechanism for use with an electrosurgical apparatus configured to be discarded after a predetermined number of sterilization/use cycles, the electrosurgical lockout mechanism comprising:

an indicator having a plurality of indicia for showing the number of remaining uses before the electrosurgical apparatus should be discarded;

an actuator configured to engage the indicator to illustrate a different one of the indicia to show the number of remaining uses;

a temperature actuated element linked to the actuator, the temperature actuated element being adapted to move the actuator in a first direction;

a mechanically actuated element linked to the actuator, the mechanically actuated element adapted to move the actuator in a second direction; and

a lockout mechanism linked to the actuator, the lockout mechanism adapted to be utilized with the temperature actuated element and the mechanically actuated element, wherein the lockout mechanism is also adapted to prevent use of the electrosurgical apparatus when the electrosurgical apparatus has undergone a predetermined number of sterilization/use cycles, the lockout mechanism being utilized with a modular electrosurgical apparatus wherein the lockout mechanism prevents use of the modular electrosurgical apparatus by preventing coupling of different portions of the modular electrosurgical apparatus.

25. An electrosurgical sterilization/use counter for use with a reusable electrosurgical apparatus being configured to accurately show the number of remaining uses subsequent to a sterilization/use cycle, the electrosurgical sterilization/use counter comprising:

an indicator having a plurality of indicia for illustrating to the user the number of remaining uses before the electrosurgical apparatus should be discarded;

an actuator linked to the indicator;

a temperature actuated element linked to the actuator; and

a mechanically actuated element linked to the actuator, wherein one of the temperature actuated element or the mechanically actuated element moves the actuator in a first direction to effect a change of indicia, and wherein the actuator is prevented from effecting a subsequent change of the indicia until the other one of the temperature actuated element or the mechanically actuated element moves the actuator in a second direction.

26. The electrosurgical sterilization/use counter of claim 25, wherein the indicator is in a linear configuration.

27. The electrosurgical sterilization/use counter of claim 26, wherein the indicator is slidable in a linear direction.

28. The electrosurgical sterilization/use counter of claim 25, wherein the indicator has a circular configuration.

29. The electrosurgical sterilization/use counter of claim 25, wherein the indicator is rotatable to display a different one of the indicia.

30. The electrosurgical sterilization/use counter of claim 25, wherein the indicator comprises a display.

31. The electrosurgical sterilization/use counter of claim 30, wherein the display comprises a seven segment display.

32. The electrosurgical sterilization/use counter of claim 31, wherein the display comprises one of a digital display, a mechanical display, or an electronic display.

33. The electrosurgical sterilization/use counter of claim 25 further comprising a mechanism for minimizing inadvertent movement of the indicator.