Devices and techniques for cutting and coagulating tissue

Patent metadata

Field	Value
Publication number	US-11890491-B2
Application number	US-201916448089-A
Country	US
Kind code	B2
Filing date	Jun 21, 2019
Priority date	Aug 6, 2008
Publication date	Feb 6, 2024
Grant date	Feb 6, 2024

Abstract

Various embodiments are directed to a method of driving an end effector coupled to an ultrasonic drive system of a surgical instrument. The method comprises generating at least one electrical signal. The at least one electrical signal is monitored against a first set of logic conditions. A first response is triggered when the first set of logic conditions is met. A parameter is determined from the at least one electrical signal.

First claim

The invention claimed is:

1. A method of driving an ultrasonic end effector coupled to an ultrasonic drive system, the method comprising:
driving, by a generator, the ultrasonic end effector at a resonant frequency thereof;
monitoring, by the generator, the resonant frequency of the ultrasonic end effector;
incrementing, by the generator, a timer when the resonant frequency is less than a threshold frequency; and
comparing, by the generator, the timer to a required trigger time.

2. The method of claim 1 , further comprising setting a logic condition when the timer is greater than the required trigger time.

3. The method of claim 1 , further comprising resetting the timer when the resonant frequency is greater than the threshold frequency.

4. The method of claim 1 , further comprising triggering a first response when the resonant frequency crosses the threshold frequency.

5. The method of claim 4 , further comprising generating an audible feedback when the first response is triggered.

6. The method of claim 4 , further comprising generating a visual feedback when the first response is triggered.

7. The method of claim 4 , further comprising generating a tactile feedback when the first response is triggered.

8. A generator for driving an ultrasonic end effector of an ultrasonic drive system, the generator comprising a control circuit, configured to:
drive the ultrasonic end effector at a resonant frequency thereof;
monitor the resonant frequency of the ultrasonic end effector;
increment a timer when the resonant frequency is less than a threshold frequency; and
compare the timer to a required trigger time.

9. The generator of claim 8 , wherein the control circuit is further configured to set a logic condition when the timer is greater than the required trigger time.

10. The generator of claim 8 , wherein the control circuit is further configured to reset the timer when the resonant frequency is greater than the threshold frequency.

11. The generator of claim 8 , wherein the control circuit is further configured to trigger a first response when the resonant frequency crosses the threshold frequency.

12. The generator of claim 11 , wherein the control circuit is further configured to generate an audible feedback when the first response is triggered.

13. The generator of claim 11 , wherein the control circuit is further configured to generate a visual feedback when the first response is triggered.

14. The generator of claim 11 , wherein the control circuit is further configured to generate a tactile feedback when the first response is triggered.

15. A generator for driving an ultrasonic end effector of an ultrasonic drive system, the generator comprising a control circuit, configured to:
drive the ultrasonic end effector at a resonant frequency thereof;
monitor the resonant frequency of the ultrasonic end effector;
compare the resonant frequency of the ultrasonic end effector to a threshold frequency;
generate a first pulse amplitude for a first period over which the generator is driven; and
generate a second pulse amplitude for a second period over which the generator is driven.

16. The generator of claim 15 , wherein the control circuit is configured to increment a timer when the resonant frequency is less than a threshold frequency.

17. The generator of claim 16 , wherein the control circuit is further configured to compare the timer to a required trigger time.

18. The generator of claim 17 , wherein the control circuit is further configured to set a logic condition when the timer is greater than the required trigger time.

19. The generator of claim 16 , wherein the control circuit is further configured to reset the timer when the resonant frequency is greater than the threshold frequency.

20. The generator of claim 15 , wherein the control circuit is further configured to trigger a first response when the resonant frequency crosses the threshold frequency.

Assignees

• Ethicon Llc
• Cilag Gmbh Int

Inventors

• Messerly Jeffrey D
• Wiener Eitan T
• Noyes Brian T
• Aldridge Jeffrey L
• Giordano James R
• Beetel Iii Robert J
• Abbott Daniel J
• Miller Matthew C
• Voegele Aaron C
• Wiley Jeffrey P
• Price Nathan J
• Price Daniel W
• Koch Jr Robert L

Classifications

• A61N7/00 Primary

  Ultrasound therapy (lithotripsy A61B17/22, A61B17/225; massage using supersonic vibration A61H23/00 {; using ultrasound for introducing media into the body A61M37/0092}) · CPC title

• A61B18/14

  Probes or electrodes therefor · CPC title

• A61N7/02

  Localised ultrasound hyperthermia · CPC title

• B06B1/0284

  with consecutive, i.e. sequential generation, e.g. with frequency sweep · CPC title

• G05B15/02

  electric · CPC title