Precision Surgical System

• US 20070173870A2
• Filed: 11/13/2005
• Published: 07/26/2007
• Est. Priority Date: 10/18/2005
• Status: Abandoned Application

• Current Assignee: Jaime Zacharias
• Original Assignee: Jaime Zacharias
• Inventors: Zacharias, Jaime
• Application Number:
  US11/164,164
• Publication Number:
  US 20070088376A1
• Time in Patent Office: Days
• US Class Current: 606/169
• CPC Class Codes: A61B 17/32002 with continuously rotating, oscillating or reciprocating cutting instruments
• CPC Class Codes: A61B 2017/32007 with suction or vacuum means
• CPC Class Codes: A61F 9/00763 with rotating or reciprocating cutting elements, e.g. concentric cutting needles atherectomy cutting instruments A61B17/3207; endoscopic cutting instruments A61B17/320016

Abstract

A high-speed surgical handpiece (10) suitable for vitreoretinal surgery having a cutter (42) and actuators (36). The cutter (42) is a guillotine-type cutter activated by an array of leveraged piezoelectric actuators (30) that receive a driving signal from a driving controller. The controller can have control and display units with a plurality of input mechanisms receiving input from a user who selects a desired cutting rate and frequency for the cutter. The control unit produces a piezoelectric actuator output signal based on the inputs received. Fast cutting rates with reduced duty cycle as well as a proportional mode of operation are available, allowing slow controlled cutting action, for example proportional to depression of a foot-pedal (74). Low degrees of vibration and noise generation are produced.

Claims

1. A precision surgical system, comprising:

a surgical instrument actuated by linear kinetic energy or oscillatory action;

wherein;

said linear kinetic energy or oscillatory action is produced by at least one leveraged piezoelectric actuator coupled to said surgical instrument, thereby providing a force and a stroke to operate said surgical instrument.

2. The surgical system of claim 1, further comprising:

said at least one leveraged piezoelectric actuator;

a surgical handpiece comprising said at least one leveraged piezoelectric actuator, coupled to said surgical instrument so as to actuate said surgical instrument using said linear kinetic energy or oscillatory action.

3. The surgical system of claim 1, further comprising:

said at least one leveraged piezoelectric actuator mechanically coupled to operate in series.

4. The surgical system of claim 1, further comprising:

a surgical handpiece controller system coupled to and controlling said surgical handpiece and said surgical instrument.

5. The surgical system of claim 1, said surgical instrument comprising a guillotine-based vitrectomy probe.

6. The surgical system of claim 1, said surgical instrument comprising a scissors.

7. The surgical system of claim 1, said surgical instrument comprising a forceps.

8. The surgical system of claim 1, said leveraged piezoelectric actuators comprising amplified piezoelectric actuators.

9. The surgical system of claim 1, said leveraged piezoelectric actuators comprising telescopic piezoelectric actuators.

10. The surgical system of claim 1, said leveraged piezoelectric actuators comprising bimorph disk translator piezoelectric actuators.

11. The surgical system of claim 1, wherein said surgical instrument is operable in repetitive mode.

12. The surgical system of claim 1, wherein said surgical instrument is operable in direct mode with motion being a function of a user interface analog input.

13. The surgical system of claim 1, wherein said surgical instrument is operable in non-resonant mode.

14. The surgical system of claim 1, wherein said surgical instrument is operable in resonant mode.

15. The surgical system of claim 1, wherein said system is operable in closed-loop servo control modality.

16. The surgical system of claim 1, further comprising an active vibration canceling system.

17. The surgical system of claim 2, said surgical handpiece further comprising sensor means to detect the linear displacement produced by the leveraged piezoelectric actuators.

18. The surgical system of claim 2, said surgical handpiece further comprising axial vibration detection means.

19. The surgical system of claim 2, said surgical handpiece further comprising active axial vibration canceling means.

20. The surgical system of claim 5, said guillotine-based vitrectomy probe comprising independently-adjustable duty cycle and cut rate.

21. The surgical system of claim 5, said guillotine-based vitrectomy probe comprising an electrically adjustable area of the maximally open sideport.

22. The surgical system of claim 5, said guillotine-based vitrectomy probe comprising a plurality of operator selectable cutter displacement waveforms.

23. A method for activating a surgical instrument comprising:

activating said surgical instrument using at least one leveraged piezoelectric actuator mechanically coupled to operate in series.

24. The method of claim 23, further comprising coupling said surgical instrument, including a vitrectomy probe, to said at least one leveraged piezoelectric actuator.

25. The method of claim 23, said leveraged piezoelectric actuators comprising amplified piezoelectric actuators.