LAPAROSCOPIC DEVICE

• US 20150105791A1
• Filed: 10/07/2014
• Published: 04/16/2015
• Est. Priority Date: 10/15/2013
• Status: Active Grant

• Current Assignee: Hermes Innovations, LLC
• Original Assignee: Hermes Innovations, LLC
• Inventors: Truckai, Csaba
• Granted Patent: US 9,649,125 B2
• Time in Patent Office: Days
• US Class Current: 606/115
• CPC Class Codes: A61B 17/00234 for minimally invasive surgery A61B17/0218, A61B17/0469, A61B17/12013, A61B17/1285, A61B17/29, A61B17/320016 take precedence
• CPC Class Codes: A61B 17/32002 with continuously rotating, oscillating or reciprocating cutting instruments
• CPC Class Codes: A61B 17/320068 using mechanical vibrations, e.g. ultrasonic A61B17/22012 takes precedence; dental tooth drilling devices operated by vibration A61C3/03; removing intra-ocular material using mechanical vibrations A61F9/00745
• CPC Class Codes: A61B 17/3203 Fluid jet cutting instruments
• CPC Class Codes: A61B 2017/00022 Sensing or detecting at the treatment site
• CPC Class Codes: A61B 2017/00026 Conductivity or impedance, e.g. of tissue
• CPC Class Codes: A61B 2017/00039 Electric or electromagnetic phenomena other than conductivity, e.g. capacity, inductivity, Hall effect
• CPC Class Codes: A61B 2017/00477 Coupling A61B2017/0046 takes precedence
• CPC Class Codes: A61B 2017/00973 pedal-operated
• CPC Class Codes: A61B 2017/22027 Features of transducers
• CPC Class Codes: A61B 2017/22079 with suction of debris
• CPC Class Codes: A61B 2017/320028 with reciprocating movements
• CPC Class Codes: A61B 2017/32007 with suction or vacuum means
• CPC Class Codes: A61B 2090/065 for measuring contact or contact pressure
• CPC Class Codes: A61B 2217/005 with suction drainage system

Abstract

A medical instrument includes a tubular cutter extending along an axis and having a windowed outer sleeve and a moveable inner cutting sleeve. An ultrasound transducer is operatively coupled to the inner cutting sleeve in order to induce motion in the inner cutting sleeve to enhance cutting or resection of tissue by the inner cutting sleeve as it is reciprocated or otherwise moved past the cutting window. The instrument typically will include a motor drive configured to reciprocate and/or rotate the inner cutting sleeve relative to the windowed outer sleeve, usually at a reciprocation rate between 1 and 10 Hz.

Claims

1. A medical instrument comprising:

a tubular cutter extending along an axis and having a windowed outer sleeve and a moveable inner cutting sleeve; and

an ultrasound transducer operatively coupled to the inner cutting sleeve.

2. The instrument of claim 1 further comprising a motor drive configured to reciprocate the inner cutting sleeve relative to the windowed outer sleeve.

3. The instrument of claim 2 wherein the motor drive reciprocates the inner cutting sleeve at a reciprocation rate between 1 and 10 Hz.

4. The instrument of claim 1 wherein the ultrasound transducer is configured to cause at least one of axial motion and rotational motion in the distal end of the inner cutting sleeve.

5. The instrument of claim 4 wherein a dimension between the ultrasound transducer and the distal end of the inner sleeve is selected to optimize at least one of axial motion and rotational motion in the distal end of the inner cutting sleeve.

6. The instrument of claim 1 further comprising at least a second ultrasound transducer, wherein first and second ultrasound transducers are configured to cause axial and rotational motion in the distal end of the inner sleeve.

7. The instrument of claim 1 wherein the ultrasound transducer is removably secured to a handle portion of the tubular cutter.

8. The instrument of claim 1 further comprising a negative pressure source coupled to a tissue extraction lumen in the tubular cutter.

9. The instrument of claim 8 further comprising a pressurized fluid source coupled to an inflow lumen in the cutter.

10. The instrument of claim 9 wherein the inflow lumen extends to an outlet in a distal portion of the cutter.

11. The instrument of claim 8 further comprising a controller coupled to cutter for controlling operating parameters of the ultrasound transducer, the motor drive, the negative pressure source and the pressurized fluid source.

12. The instrument of claim 11 further comprising a sensor configured to send signals to the controller indicating the position of the inner sleeve relative to the window in the outer sleeve.

13. The instrument of claim 12 wherein the controller is adapted to modulate activation of the ultrasound transducer in response to the sensor signals that indicate the position of the inner sleeve.

14. The instrument of claim 13 wherein the controller activates the ultrasound transducer when the inner sleeve moves toward a window-closed position to cut tissue and de-activates the ultrasound transducer when the inner sleeve moves toward a window-open position.

15. The instrument of claim 12 wherein the controller activates the pressurized fluid source when the inner sleeve is in a window-closed position.

16. The instrument of claim 12 wherein the controller de-activates the pressurized fluid source when the inner sleeve is in a window-open position.

17. The instrument of claim 9 wherein the pressurized fluid source comprises a liquid source.

18. The instrument of claim 9 wherein the pressurized fluid source comprises a gas source.

19. A medical instrument comprising:

a tubular assembly extending along an axis with a windowed outer sleeve and a moveable inner cutting sleeve, wherein the inner cutting sleeve has a tissue-extraction passageway; and

a seal in the tissue-extraction passageway in the inner cutting sleeve, the seal having a first condition that closes the passageway and second condition that permits a tissue chip to pass through the seal.

20. The instrument of claim 19 wherein the tubular assembly has a flow channel terminating in a distal outlet in a region of the assembly that is distal to the seal, wherein the flow channel is in communication with a fluid source.

21. The instrument of claim 19 wherein the tubular assembly has a flow channel terminating in a distal outlet in a region of the assembly that is distal to the seal, wherein the flow channel is in communication with a negative pressure source.