Automatic identification of tracked surgical devices using an electromagnetic localization system
First Claim
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1. A navigation system comprising:
- an instrument comprising;
a first member comprising;
a tip configured to contact a patient, anda first identification element configured to distort an electromagnetic field, anda second member configured to be set in a fixed position relative to the first member, wherein the second member comprises a tracking device, and wherein the tracking device is configured to (i) transmit or receive the electromagnetic field, and (ii) prior to the second member being held in the fixed position, be displaced relative to the first identification element to provide the distortion of the electromagnetic field;
a tracking system operable to determine a first position of the tracking device relative to a reference point based on a strength of the electromagnetic field relative to the tracking device; and
a processor operable to (i) identify the first member based on the distortion of the electromagnetic field during the displacement of the tracking device relative to the first identification element, and (ii) determine a second position of the tip of the instrument based on the first position,whereinthe first member includes a first plurality of identification elements,the first plurality of identification elements comprise the first identification element and distort the electromagnetic field, andthe first plurality of identification elements provide a distortion pattern that is unique for the instrument.
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Abstract
A method and apparatus for identifying a member used in a navigation system. The navigation system can determine the identification of an instrument via an input. The input can be substantially automatic when an instrument is introduced into the navigation system field or assembly.
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Citations
17 Claims
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1. A navigation system comprising:
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an instrument comprising; a first member comprising; a tip configured to contact a patient, and a first identification element configured to distort an electromagnetic field, and a second member configured to be set in a fixed position relative to the first member, wherein the second member comprises a tracking device, and wherein the tracking device is configured to (i) transmit or receive the electromagnetic field, and (ii) prior to the second member being held in the fixed position, be displaced relative to the first identification element to provide the distortion of the electromagnetic field; a tracking system operable to determine a first position of the tracking device relative to a reference point based on a strength of the electromagnetic field relative to the tracking device; and a processor operable to (i) identify the first member based on the distortion of the electromagnetic field during the displacement of the tracking device relative to the first identification element, and (ii) determine a second position of the tip of the instrument based on the first position, wherein the first member includes a first plurality of identification elements, the first plurality of identification elements comprise the first identification element and distort the electromagnetic field, and the first plurality of identification elements provide a distortion pattern that is unique for the instrument. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A navigation system comprising:
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an instrument comprising; a first member comprising; a tip configured to contact a patient, and a first identification element configured to distort an electromagnetic field, and a second member configured to be set in a fixed position relative to the first member, wherein the second member comprises a tracking device, and wherein the tracking device is configured to (i) transmit or receive the electromagnetic field, and (ii) prior to the second member being held in the fixed position, be displaced relative to the first identification element to provide the distortion of the electromagnetic field; a tracking system operable to determine a first position of the tracking device relative to a reference point based on a strength of the electromagnetic field relative to the tracking device; and a processor operable to (i) identify the first member based on the distortion of the electromagnetic field during the displacement of the tracking device relative to the first identification element, and (ii) determine a second position of the tip of the instrument based on the first position, wherein the first member includes a first plurality of identification elements, the first plurality of identification elements comprise the first identification element and distort the electromagnetic field, each of the first plurality of identification elements distort the electromagnetic field differently than other ones of the first plurality of identification elements during displacement of the tracking device relative to the first plurality of identification elements, the first plurality of identification elements have respective first characteristics, the distortion of the electromagnetic field by the first plurality of identification elements generates a first distortion pattern, and the processor is configured to identify the first member based on the first distortion pattern. - View Dependent Claims (12, 13)
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14. An instrument for performing a surgical procedure on a patient, the instrument comprising:
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a first member comprising tip configured to contact the patient, a channel, and a first identification element extending at least partially around the channel, wherein the first identification element is configured to distort an electromagnetic field; and a second member configured to be slid into the channel of the first member, wherein the second member comprises a tracking device, wherein the tracking device is configured to (i) transmit or receive the electromagnetic field, and (ii) be displaced relative to the first identification element while sliding the second member in the first member to provide the distortion of the electromagnetic field wherein; the first member includes a plurality of identification elements, the plurality of identification elements comprise the first identification element and distort the electromagnetic field, the plurality of identification elements provide a distortion pattern that is unique for the instrument, the plurality of identification elements have respective characteristics, and the distortion of the electromagnetic field by the plurality of identification elements generates the distortion pattern for identification of the first member based on the distortion pattern. - View Dependent Claims (15, 16, 17)
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Specification