IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0782879
(2010-05-19)
|
등록번호 |
US-8357175
(2013-01-22)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
36 |
초록
▼
A tissue cutting device especially suited for neurosurgical applications is disclosed and described. The device includes a handpiece and an outer cannula in which a reciprocating inner cannula is disposed. At least one position transducer for tracking a location in space of the tissue cutting device
A tissue cutting device especially suited for neurosurgical applications is disclosed and described. The device includes a handpiece and an outer cannula in which a reciprocating inner cannula is disposed. At least one position transducer for tracking a location in space of the tissue cutting device is rigidly associated with the handpiece. The position transducer is operable for sending a signal indicative of a location of a distal end of the outer cannula. The tissue cutting device may also include an angular position sensor for determining an angular position of the outer cannula relative to the position transducer.
대표청구항
▼
1. A neurosurgical tissue removal device comprising: a handpiece,an outer cannula having an outer cannula lumen, a proximal end, a distal end, and an outer cannula opening adjacent the distal end, wherein the opening is for receiving tissue to be severed, wherein the outer cannula opening is rotatab
1. A neurosurgical tissue removal device comprising: a handpiece,an outer cannula having an outer cannula lumen, a proximal end, a distal end, and an outer cannula opening adjacent the distal end, wherein the opening is for receiving tissue to be severed, wherein the outer cannula opening is rotatable with respect to the handpiece;an inner cannula disposed in the outer cannula lumen and reciprocable within the outer cannula lumen, the inner cannula having an inner cannula lumen, a proximal end, an open distal end, and a cutting edge at the distal end;at least one position transducer rigidly associated with the handpiece, the position transducer operable for sending a locating signal indicative of a position in space of the distal end of the outer cannula; andan angular position sensor configured to determine an angular position of the outer cannula opening with respect to the at least one position transducer. 2. The tissue removal device of claim 1, wherein the at least one position transducer is arranged at fixed predetermined distance from the distal end of the outer cannula. 3. The tissue removal device of claim 1, wherein the at least one position transducer includes at least one of an optical transducer, acoustic transducer, radio frequency emitter and electromagnetic transducer. 4. The tissue removal device of claim 3, wherein the optical transducer includes a light emitting diode. 5. The tissue removal device of claim 1 further comprising a substantially inelastic frame rigidly connected to the handpiece, wherein the at least one position transducer is rigidly attached to the frame. 6. The tissue removal device of claim 5, wherein the handpiece is disposed between the frame and the outer cannula opening. 7. The tissue removal device of claim 1 further comprising at least two position transducers, each position transducer spaced a fixed predetermined distance from the distal end of the outer cannula. 8. The tissue removal device of claim 1, further comprising a magnet fixed to the outer cannula for rotation therewith, wherein the angular position sensor includes a sensing circuit configured to detect a magnetic field generated by the magnet. 9. A neurosurgical tissue removal system comprising: a tissue removal device comprising: a handpiece,an outer cannula having an outer cannula lumen, a proximal end, a distal end, and an outer cannula opening adjacent the distal end, wherein the opening defines a cutting edge for severing tissue, wherein the outer cannula opening is rotatable with respect to the handpiece;an inner cannula disposed in the outer cannula lumen and reciprocable within the outer cannula lumen, the inner cannula having an inner cannula lumen, a proximal end, an open distal end, and cutting edge at the distal end;at least one first position transducer rigidly associated with the handpiece, the at least one position transducer operable for sending a locating signal indicative of a position within a surgical space of the distal end of the outer cannula;a position detector operable for receiving the locating signal sent from the at least one first position transducer; andan angular position sensor configured to determine an angular position of the outer cannula opening with respect to the at least one position transducer. 10. The tissue removal system of claim 9, wherein the position detector includes at least two position signal sensors operable for receiving the locating signal transmitted from the at least one first position transducer. 11. The tissue removal system of claim 10 further comprising a digital processor operably connected to the position detector, the digital processor configured for determining a location within the surgical space of the distal end of the outer cannula in response to a signal received from the position detector. 12. The tissue removal system of claim 11 further comprising a monitor operably connected to the digital processor, the monitor operable for displaying a position of the distal end of the outer cannula relative to a predetermined image space. 13. The tissue removal system of claim 11 further comprising at least one second position transducer operable for sending a reference signal indicative of a position within the surgical space of a reference point, the reference signal used in connection with registering the surgical space to a predetermined image space. 14. The tissue removal system of claim 13, wherein the position detector is operable for receiving the reference signal sent by the at least one second position transducer, and the digital processor is configured for determining a location of the distal end of the outer cannula within the surgical space in response to a signal received from the at least one second position detector. 15. The tissue removal device of claim 9 further comprising: a trocar having a shaft with a working channel and an endoscope within the trocar, the outer cannula selectively engageable with the working channel. 16. The tissue removal device of claim 9 further comprising an angular position sensor operably associated with the outer cannula, the angular position sensor operable for sensing an angular position of the outer cannula relative to the at least one first position transducer. 17. A method of performing a neurosurgical procedure comprising: providing a tissue removal device comprising: a handpiece,an outer cannula having an outer cannula lumen, a proximal end, a distal end, and an outer cannula opening adjacent the distal end, wherein the opening defines a cutting edge for severing tissue, wherein the outer cannula opening is rotatable with respect to the handpiece, andan inner cannula disposed in the outer cannula lumen and reciprocable within the outer cannula lumen, the inner cannula having an inner cannula lumen, a proximal end, a distal end, and a cutting edge at the distal end;providing a surgical instrument position tracking system comprising at least one first position transducer rigidly associated with the handpiece, the at least one position transducer operable for sending a locating signal, and an angular position sensor configured to determine an angular position of the outer cannula opening with respect to the at least one position transducer;determining a surgical space surrounding a target tissue associated with the patient's neurological system based on the reference signal;guiding the distal end of the outer cannula to the target tissue located within the surgical space in response to the location signal and the reference signal; andreciprocating the inner cannula within the outer cannula lumen between a proximal position and a distal position, such that when the inner cannula is in the proximal position, the target tissue is received in the outer cannula opening, and when the inner cannula moves towards the distal position, the cutting section pivots and the received tissue is severed from surrounding tissue. 18. The method of claim 17 further comprising the step of determining an image space including the patient anatomy surrounding the target tissue. 19. The method of claim 18 further comprising: displaying a graphical representation of the image space on a monitor;superimposing a graphical representation of the distal end of the outer cannula onto the graphical representation of the image space identifying a position of the distal end of the outer cannula within the image space; andguiding the distal end of the outer cannula to the target tissue in response to the graphical image displayed on the monitor. 20. The method of claim 18, wherein the step of determining the image space comprises: associating at least one fiducial marker with the patient anatomy;obtaining multiple image scans of the patient anatomy, at least one of the image scans including the target tissue, and at least one of the image scans including at least one fiducial marker; andestablishing a reference frame based on the fiducial markers and the image scans. 21. The method of claim 20, wherein the image scans comprise at least one of a computed tomography scan, a magnetic resonance imaging scan, a positron emission tomography scan, a fluoroscopy scan, and an ultrasound scan. 22. The method of claim 20 further comprising the step of registering the surgical space to the image space. 23. The method of claim 22, wherein the step of registering the surgical space to the image space comprises: selecting a first fiducial marker from the at least one fiducial marker associated with the patient anatomy;identifying the first fiducial marker in the image scans; andcontacting the first fiducial marker associated with the patient anatomy with the distal end of the outer cannula and sending a locating signal from the at least one first position transducer indicative of the location of the first fiducial marker within the surgical space. 24. The method of claim 23 further comprising repeating the steps of selecting the fiducial marker, identifying the fiducial marker in the image scan, and contacting the fiducial marker with the distal end of the outer cannula and sending a corresponding locating signal, for each of the remaining fiducial markers. 25. The method of claim 17 further comprising: providing a tissue removal assembly including a trocar and the tissue removal device, the trocar having a proximal end arranged adjacent the tissue removal device handpiece and an opposite distal end, wherein at least a portion of the tissue removal device is disposed in the trocar;positioning the distal end of the outer cannula adjacent the distal end of the trocar; andguiding the distal end of the outer cannula to the target tissue in response to the location signal while substantially maintaining the position of the distal end of the outer cannula adjacent the distal end of the trocar. 26. The method of claim 25 further comprising adjusting a position of the distal end of the outer cannula in response to the location signal while substantially maintaining a position of the distal end of the trocar relative to the target tissue. 27. The method of claim 17 further comprising: providing at least one second position transducer operable for sending a reference signal indicative of the location in space of a reference point associated with a patient anatomy;determining the surgical space based on the reference signal; andguiding the distal end of the outer cannula to the target tissue located within the surgical space in response to the location signal and the reference signal.
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