Precision surgical system

• US 20070088376A1
• Filed: 11/13/2005
• Published: 04/19/2007
• 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) a surgical handpiece controller system, b) a surgical handpiece connected to said surgical handpiece controller system, c) said surgical handpiece including a surgical instrument actuated by linear kinetic energy, d) at least one leveraged piezoelectric actuator mechanically coupled to operate in series and mounted in said surgical handpiece for producing kinetic energy, e) means for controllably coupling said kinetic energy produced by said leveraged piezoelectric actuators to said surgical instrument, whereby said leveraged piezoelectric actuators activated by said surgical handpiece controller system provide the force and stroke to operate said surgical instrument.

2. The surgical instrument of claim 1 being a guillotine based vitrectomy probe.

3. The surgical instrument of claim 1 being a scissors.

4. The surgical instrument of claim 1 being a forceps.

5. The leveraged piezoelectric actuators of claim 1 being amplified piezoelectric actuators.

6. The leveraged piezoelectric actuators of claim 1 being telescopic piezoelectric actuators.

7. The leveraged piezoelectric actuators of claim 1 being bimorph disk translator piezoelectric actuators.

8. The surgical instrument of claim 1 being operable in repetitive mode.

9. The surgical instrument of claim 1 being operable in direct mode with motion being a function of a user interface analog input.

10. The surgical instrument of claim 1 being operable in non-resonant mode.

11. The surgical instrument of claim 1 being operable in resonant mode.

12. The surgical handpiece of claim 1 further including sensor means to detect the linear displacement produced by the leveraged piezoelectric actuators.

13. The surgical system of claim 1 being operable in closed-loop servo control modality.

14. The surgical handpiece of claim 1 further including axial vibration detection means.

15. The surgical handpiece of claim 1 further including active axial vibration canceling means.

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

17. The guillotine based vitrectomy probe of claim 2 having independently adjustable duty cycle and cut rate.

18. The guillotine based vitrectomy probe of claim 2 having an electrically adjustable area of the maximally open sideport.

19. The guillotine based vitrectomy probe of claim 2 having a plurality of operator selectable cutter displacement waveforms.

20. A method for activating a surgical instrument comprising the use of at least one leveraged piezoelectric actuator mechanically coupled to operate in series.

21. The surgical instrument of claim 20 including a vitrectomy probe.

22. The leveraged piezoelectric actuators of claim 20 being amplified piezoelectric actuators.