System and method for navigated drill guide
First Claim
1. A system comprising:
- a guide instrument that has a first proximal end, a first distal end and defines a first bore, the guide instrument positionable with a handle adjacent to an anatomy;
a sleeve having a second proximal end, a second distal end and a second bore, the sleeve slideably received within the first bore;
a drill bit slideably received within the second bore and moveable relative to the sleeve, having a third distal end and an axially extending body composed of a first non-ferrous metal material, the body including at least two distinct segments that are axially separated, wherein the at least two distinct segments composed of a second non-ferrous metal material, the first non-ferrous metal material having a first magnetic permeability different from a second magnetic permeability of the second non-ferrous metal material and the at least two distinct segments include a segment length less than a total length of the body;
at least one tracking device fixedly coupled about the sleeve; and
a controller configured to receive a varying signal from the at least one tracking device based at least on the first magnetic permeability different from the second magnetic permeability;
wherein when the sleeve is in a first position, the at least one tracking device indicates a position of the first distal end of the guide instrument, and when the sleeve is in a second position, the at least one tracking device indicates a position of the third distal end of the drill bit;
wherein movement of the drill bit relative to and within the second bore of the sleeve and relative to the at least one tracking device acts to change a current induced in the at least one tracking device due to movement of a first distinct segment and a second distinct segment of the at least two distinct segments through the at least one tracking device and to determine a depth of the third distal end;
wherein the controller receives the varying signal based on the current induced in the at least one tracking device to at least assist in determining at least one of a position or a trajectory of the drill bit.
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Accused Products
Abstract
A system for tracking a navigated instrument. The system can include a first elongated instrument and a second elongated instrument. The first elongated instrument can have a first proximal end and a first distal end. The first elongated instrument can be adapted to be positioned relative to an anatomy. The second elongated instrument can move adjacent to the first elongated instrument. The second elongated instrument can have a second proximal end and a second distal end. The system can also include at least one tracking device coupled to the second elongated instrument. When the second elongated instrument is in a first position, the at least one tracking device tracks the first distal end of the first elongated instrument, and when the second elongated instrument is in a second position, the at least one tracking device tracks the second distal end of the second elongated instrument.
56 Citations
23 Claims
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1. A system comprising:
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a guide instrument that has a first proximal end, a first distal end and defines a first bore, the guide instrument positionable with a handle adjacent to an anatomy; a sleeve having a second proximal end, a second distal end and a second bore, the sleeve slideably received within the first bore; a drill bit slideably received within the second bore and moveable relative to the sleeve, having a third distal end and an axially extending body composed of a first non-ferrous metal material, the body including at least two distinct segments that are axially separated, wherein the at least two distinct segments composed of a second non-ferrous metal material, the first non-ferrous metal material having a first magnetic permeability different from a second magnetic permeability of the second non-ferrous metal material and the at least two distinct segments include a segment length less than a total length of the body; at least one tracking device fixedly coupled about the sleeve; and a controller configured to receive a varying signal from the at least one tracking device based at least on the first magnetic permeability different from the second magnetic permeability; wherein when the sleeve is in a first position, the at least one tracking device indicates a position of the first distal end of the guide instrument, and when the sleeve is in a second position, the at least one tracking device indicates a position of the third distal end of the drill bit; wherein movement of the drill bit relative to and within the second bore of the sleeve and relative to the at least one tracking device acts to change a current induced in the at least one tracking device due to movement of a first distinct segment and a second distinct segment of the at least two distinct segments through the at least one tracking device and to determine a depth of the third distal end; wherein the controller receives the varying signal based on the current induced in the at least one tracking device to at least assist in determining at least one of a position or a trajectory of the drill bit. - View Dependent Claims (2, 3)
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4. A method comprising:
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positioning a first elongated instrument relative to a second elongated instrument, the first elongated instrument having a first proximal end, a first distal end and a first bore with at least one tracking device positioned around the first bore of the first elongated instrument, the second elongated instrument having a second proximal end and a second distal end; moving the second elongated instrument within the first bore of the first elongated instrument to vary a signal induced in the at least one tracking device due to a plurality of distinct and separated segments spaced along the length of the second elongated instrument, wherein each distinct and separated segment is formed of a first material that differs from a second material forming the remaining portions of the second elongated instrument, wherein the first material has different magnetic permeability than the second material forming the second elongated instrument; tracking the at least one tracking device; and determining, based on the tracking of the at least one tracking device, a location of the first distal end of the first elongated instrument or the second distal end of the second elongated instrument. - View Dependent Claims (5)
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6. A method comprising:
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positioning a first elongated instrument with a handle relative to a second elongated instrument, the first elongated instrument having a first proximal end and a first distal end and a first bore extending therebetween, the second elongated instrument including a sleeve and a drill bit, the sleeve having a second proximal end, a second distal end, and a second bore with at least one tracking device positioned around the sleeve and the second bore, the drill bit having a third proximal end and a third distal end, the drill bit provided with at least a first segment and a second segment discrete and separated by a distance from the first segment, the first segment and the second segment disposed at fixed and different positions spaced from the third distal end; moving the drill bit within the second bore of the sleeve to vary an amount of current induced in the at least one tracking device due to positioning at least one of the first segment or the second segment within the at least one tracking device, wherein an amount of current induced is based at least on the first segment and the second segment being formed of a segment material having a first magnetic permeability different than a second magnetic permeability of a drill bit material of the remainder of the drill bit; and tracking of at least the third distal end of the drill bit based on varying the current induced in the at least one tracking device with the first segment or the second segment having the first magnetic permeability and second magnetic permeability. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A system comprising:
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a sleeve that has a first proximal end, a first distal end and a first bore; a guide instrument that has a second proximal end, a second distal end and defines a second bore that is adapted to slideably receive the sleeve, the guide instrument positionable with a handle adjacent to an anatomy; at least one electromagnetic tracking device coupled to the sleeve, the at least one electromagnetic tracking device moveable relative to the guide instrument; and a drill bit slideably received within the first bore, the drill bit having a body composed of a first material, the body including at least two distinct segments composed of a second material that is different from the first material; wherein when the sleeve is at a first physical position within the first bore of the guide instrument, the at least one electromagnetic tracking device indicates a position of the second distal end of the guide instrument; wherein when the sleeve is at a second physical position within the first bore of the guide instrument, the at least one electromagnetic tracking device indicates a position of the third distal end of the drill bit. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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Specification