Method, System and Apparatus For Guaranteeing Laser Shut-Down Time

• US 20090036955A1
• Filed: 08/03/2007
• Published: 02/05/2009
• Est. Priority Date: 08/03/2007
• Status: Abandoned Application

• Current Assignee: Novartis Ag
• Original Assignee: Novartis Ag
• Inventors: Han, Xiang Simon
• Application Number:
  US11/833,291
• Publication Number:
  US 20090036955A1
• Time in Patent Office: Days
• US Class Current: 607/89
• CPC Class Codes: A61B 2017/00123 and automatic shutdown
• CPC Class Codes: A61F 9/008 using laser
• CPC Class Codes: A61F 9/00823 Laser features or special beam parameters therefor
• CPC Class Codes: H01S 5/06825 Protecting the laser, e.g. during switch-on/off, detection of malfunctioning or degradation

Abstract

Systems, methods and apparatuses for guaranteeing a shut-down time for a laser in a laser surgical unit are presented. More particularly, embodiments of such methods, systems and apparatuses may provide shut-down logic which comprises a timer which may be triggered by a signal received from an event. At the expiration of the timer a signal may be output which is configured to disable the output of the laser. Specifically, in one embodiment, software may be used to configure a shut-down time and a set of events to be utilized to start the timer. Upon firing of the laser the timer will be enabled. During the operation of the laser then, if one of the set of events occurs the timer will be triggered such that at the end of the shut-down time the output of the laser will be disabled.

Claims

1. Shut-down logic for use with a laser surgical unit, comprising:

a first AND gate;

a set of present signal lines coupled to the first AND gate;

a timer coupled to an output of the first AND gate;

a laser enable signal, where the a state of the laser enable signal is based upon an output of the timer; and

a laser coupled to the laser enable signal, wherein the laser is configured to be disabled based upon a state of the laser enable signal.

2. The logic of claim 1, wherein each of the present signal lines is coupled to one or more corresponding input signal lines.

3. The logic of claim 2, wherein each of the corresponding input signal lines is coupled to a second AND gate if there is more than one corresponding input signal line, wherein the state of the corresponding present signal line coupled to the output of the second AND gate.

4. The logic of claim 3, wherein a corresponding input signal line is coupled to an input of an inverter if a firing state corresponding to the input signal line is low.

5. The logic of claim 4, wherein the output of the inverter is coupled to the second AND gate if there is more than one input signal line corresponding to the present signal line to which the input signal corresponds.

6. The logic of claim 5, wherein each of the set of input signal lines is associated with an event associated with the operation of the laser surgical unit.

7. The logic of claim 5, wherein the timer is operable to be enabled based upon the output of the first AND gate.

8. The logic of claim 7, wherein each of the present signal lines is coupled to a corresponding decoupler, each decoupler operable to decouple the corresponding set of input lines from the corresponding present signal line based upon a decoupling signal.

9. The logic of claim 8, wherein a state of each of the decoupling signals is based upon a configuration determined in conjunction with software executing on the laser surgical unit.

10. The logic of claim 9, wherein each of the present signal lines is coupled to a power source.

11. The logic of claim 7, wherein an output of the timer is coupled to a third AND gate, a software laser enable signal is coupled to the third AND gate and the output of the third AND gate determines the state of the laser enable signal.

12. The logic of claim 11, wherein a state of the software laser enable signal is determined in conjunction with the software executing on the laser surgical unit.

13. A laser surgical unit, comprising:

a laser; and

shut-down logic, the shut-down logic comprising

a first AND gate;

a set of present signal lines coupled to the first AND gate;

a timer coupled to an output of the first AND gate;

a laser enable signal, wherein a state of the laser enable signal is based upon an output of the timer, wherein the laser is configured to be disabled based upon a state of the laser enable signal.

14. The laser surgical unit of claim 13, wherein each of the present signal lines is coupled to one or more corresponding input signal lines.

15. The laser surgical unit of claim 14, wherein each of the corresponding input signal lines is coupled to a second AND gate if there is more than one corresponding input signal line, wherein the state of the corresponding present signal line coupled to the output of the second AND gate.

16. The laser surgical unit of claim 15, wherein a corresponding input signal line is coupled to an input of an inverter if a firing state corresponding to the input signal line is low.

17. The laser surgical unit of claim 16, wherein the output of the inverter is coupled to the second AND gate if there is more than one input signal line corresponding to the present signal line to which the input signal corresponds.

18. The laser surgical unit of claim 17, wherein each of the set of input signal lines is associated with an event associated with the operation of the laser surgical unit.

19. The laser surgical unit of claim 17, wherein the timer is operable to be enabled based upon the output of the first AND gate.

20. The laser surgical unit of claim 19, wherein each of the present signal lines is coupled to a corresponding decoupler, each decoupler operable to decouple the corresponding set of input lines from the corresponding present signal line based upon a decoupling signal.

21. The laser surgical unit of claim 20, wherein a state of each of the decoupling signals is based upon a configuration determined in conjunction with software executing on the laser surgical unit.

22. The laser surgical unit of claim 21, wherein each of the present signal lines is coupled to a power source.

23. The laser surgical unit of claim 19, wherein an output of the timer is coupled to a third AND gate, a software laser enable signal is coupled to the third AND gate and the output of the third AND gate determines the state of the laser enable signal.

24. The laser surgical unit of claim 23, wherein a state of the software laser enable signal is determined in conjunction with the software executing on the laser surgical unit.

25. A laser surgical unit, comprising:

a first present signal line corresponding to a first doctor filter;

a second present signal line corresponding to a second doctor filter;

a third present signal line corresponding to a first probe;

a fourth present signal line corresponding to a second probe;

a fifth present signal line corresponding to a footswitch;

a sixth present signal line corresponding to a standby/ready button;

a seventh present signal line corresponding to a room lock;

a eighth present signal line corresponding to an external controller;

a first AND gate, where the input of the first AND gate is coupled to the first present signal line, the second present signal line, the third present signal line, the fourth present signal line, the fifth present signal line, the sixth present signal line;

the seventh present signal line and the eighth present signal line;

a timer coupled to the output of the first AND gate;

a second AND gate coupled to the output of the timer;

a laser enable signal coupled to the output of the second AND gate, wherein the laser is configured to be disabled based upon a state of the laser enable signal.