Systems and methods for making and using a motor distally-positioned within a catheter of an intravascular ultrasound imaging system
First Claim
Patent Images
1. A catheter assembly for an intravascular ultrasound system, the catheter assembly comprising:
- a catheter having a longitudinal length, a distal end, and a proximal end, the catheter comprising a lumen extending along the longitudinal length of the catheter from the proximal end to the distal end;
an imaging core with a longitudinal length that is substantially less than the longitudinal length of the catheter, the imaging core configured and arranged for inserting into the lumen to the distal end of the catheter, the imaging core comprisinga rotatable driveshaft having a distal end and a proximal end,at least one rotatable transducer disposed at and coupled to the distal end of the driveshaft, the at least one transducer configured and arranged for transforming applied electrical signals to acoustic signals and also for transforming received echo signals to electrical signals,a transformer disposed at the proximal end of the driveshaft,at least one imaging core conductor coupling the at least one transducer to the transformer, anda motor coupled to the driveshaft between the one or more transducers and the transformer, the motor comprising a rotatable magnet and at least two magnetic field windings disposed around at least a portion of the magnet, the magnet having a longitudinal axis and an aperture defined along the longitudinal axis of the magnet;
at least one catheter conductor electrically coupled to the transformer and extending to the proximal end of the catheter; and
at least one motor conductor electrically coupled to the magnetic field windings and extending to the proximal end of the catheter,wherein the assembly does not include a mirror.
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Accused Products
Abstract
A catheter assembly for an intravascular ultrasound system includes an imaging core configured and arranged for inserting into a distal end of a lumen of a catheter. The imaging core includes at least one transducer mounted to a driveshaft and configured and arranged for transforming applied electrical signals to acoustic signals and also for transforming received echo signals to electrical signals. A motor is coupled to the driveshaft between the one or more transducers and the transformer. The motor includes a rotatable magnet and at least two magnetic field windings disposed around at least a portion of the magnet.
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Citations
26 Claims
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1. A catheter assembly for an intravascular ultrasound system, the catheter assembly comprising:
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a catheter having a longitudinal length, a distal end, and a proximal end, the catheter comprising a lumen extending along the longitudinal length of the catheter from the proximal end to the distal end; an imaging core with a longitudinal length that is substantially less than the longitudinal length of the catheter, the imaging core configured and arranged for inserting into the lumen to the distal end of the catheter, the imaging core comprising a rotatable driveshaft having a distal end and a proximal end, at least one rotatable transducer disposed at and coupled to the distal end of the driveshaft, the at least one transducer configured and arranged for transforming applied electrical signals to acoustic signals and also for transforming received echo signals to electrical signals, a transformer disposed at the proximal end of the driveshaft, at least one imaging core conductor coupling the at least one transducer to the transformer, and a motor coupled to the driveshaft between the one or more transducers and the transformer, the motor comprising a rotatable magnet and at least two magnetic field windings disposed around at least a portion of the magnet, the magnet having a longitudinal axis and an aperture defined along the longitudinal axis of the magnet; at least one catheter conductor electrically coupled to the transformer and extending to the proximal end of the catheter; and at least one motor conductor electrically coupled to the magnetic field windings and extending to the proximal end of the catheter, wherein the assembly does not include a mirror. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A catheter assembly for an intravascular ultrasound system, the catheter assembly comprising:
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a catheter having a longitudinal length, a distal end, and a proximal end, the catheter comprising a lumen extending along the longitudinal length of the catheter from the proximal end to the distal end; an imaging core with a longitudinal length that is substantially less than the longitudinal length of the catheter, the imaging core configured and arranged for inserting into the lumen to the distal end of the catheter, the imaging core comprising a motor comprising a rotatable magnet and at least two magnetic field windings disposed around at least a portion of the magnet, the magnet having a longitudinal axis and an aperture defined along the longitudinal axis of the magnet, at least one transducer disposed in the imaging core, wherein the at least one transducer is configured and arranged for transforming applied electrical signals to acoustic signals and also for transforming received echo signals to electrical signals, and wherein the at least one transducer is fixed in position such that the at least one transducer does not rotate with the magnet, and a mirror positioned distal to the at least one transducer, wherein the mirror is tilted at an angle such that when an acoustic beam is emitted from the at least one transducer to the mirror, the acoustic beam is redirected in a direction that is not parallel the longitudinal axis of the magnet, and wherein the rotation of the magnet causes the mirror to rotate; at least one catheter conductor electrically coupled to the one or more transducers and extending to the proximal end of the catheter; and at least one motor conductor electrically coupled to the magnetic field windings and extending to the proximal end of the catheter, wherein the at least one transducer is disposed in the aperture defined in the magnet. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A catheter assembly for an intravascular ultrasound system, the catheter assembly comprising:
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a catheter having a longitudinal length, a distal end, and a proximal end, the catheter comprising a lumen extending along the longitudinal length of the catheter from the proximal end to the distal end; an imaging core with a longitudinal length that is substantially less than the longitudinal length of the catheter, the imaging core configured and arranged for inserting into the lumen to the distal end of the catheter, the imaging core comprising a motor disposed in a housing with a distal end cap, the motor comprising a rotatable motor magnet and at least two magnetic field windings disposed around at least a portion of the motor magnet, the magnet having a longitudinal axis and a motor shaft disposed along the longitudinal axis of the motor magnet, at least one transducer disposed in the imaging core, wherein the at least one transducer is configured and arranged for transforming applied electrical signals to acoustic signals and also for transforming received echo signals to electrical signals, and wherein the at least one transducer is fixed in position such that the at least one transducer does not rotate with the motor magnet, and a redirecting mirror comprising a mirror magnet having a reflective surface, the mirror positioned proximal to the at least one transducer, wherein the reflective surface is tilted at an angle such that when an acoustic beam is emitted from the at least one transducer to the reflective surface, the acoustic beam is redirected in a direction that is not parallel the longitudinal axis of the motor magnet, and wherein the mirror magnet and the motor magnet are magnetically coupled together within the end cap such that the rotation of the motor magnet causes the mirror to rotate; at least one transducer conductor electrically coupled to the one or more transducers and extending to the proximal end of the catheter; and at least one motor conductor electrically coupled to the magnetic field windings and extending to the proximal end of the catheter. - View Dependent Claims (21, 22, 23, 24)
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25. A catheter assembly for an intravascular ultrasound system, the catheter assembly comprising:
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a catheter having a longitudinal length, a distal end, and a proximal end, the catheter comprising a lumen extending along the longitudinal length of the catheter from the proximal end to the distal end; an imaging core with a longitudinal length that is substantially less than the longitudinal length of the catheter, the imaging core configured and arranged for inserting into the lumen to the distal end of the catheter, the imaging core comprising a motor disposed in a housing with a distal end cap, the motor comprising a rotatable magnet and at least two magnetic field windings disposed around at least a portion of the magnet, the magnet having a longitudinal axis along which the magnet rotates, at least one rotatable transducer disposed in the imaging core, the at least one transducer comprising a transducer magnet, wherein the at least one transducer is configured and arranged for transforming applied electrical signals to acoustic signals and also for transforming received echo signals to electrical signals, and wherein the transducer magnet and the motor magnet are magnetically coupled together within the end cap such that the rotation of the motor magnet causes the at least one transducer to rotate with the motor magnet, and a transformer electrically coupled to the at least one transducer; at least one transducer conductor electrically coupled to the transformer and extending to the proximal end of the catheter; and at least one motor conductor electrically coupled to the magnetic field windings and extending to the proximal end of the catheter. - View Dependent Claims (26)
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Specification