Atherectomy catheter drive assemblies
First Claim
1. A drive assembly for driving an imaging catheter having a rotatable fiber and a rotatable drive shaft, the drive assembly comprising:
- a fiber optic rotating junction having a stationary portion with a stationary fiber therein and a rotatable portion with a rotatable fiber therein;
a first optical connection configured to connect the stationary fiber with a light source;
a motor configured to rotate the rotatable portion of the fiber optic rotating junction;
a second optical connection configured to connect the rotatable portion of the fiber optic rotating junction with both the drive shaft and the rotatable fiber of the imaging catheter so as to transmit torque from the motor to the drive shaft and the rotatable fiber of the catheter and so as to transmit light from the light source to the rotatable fiber of the catheter;
a sensor configured to detect a rotational position of the fiber optic rotating junction; and
a processor configured to obtain the detected rotational position and stop the motor only when the fiber optic rotating junction is in a predetermined rotational position.
4 Assignments
0 Petitions
Accused Products
Abstract
A drive assembly for driving an imaging catheter has a rotatable fiber and a rotatable drive shaft. The drive assembly includes a fiber optic rotating junction and a motor configured to rotate the rotatable portion of the fiber optic rotating junction. In some embodiments, the drive assembly includes a sensor configured to detect a rotational position of the fiber optic rotating junction and a processor configured to obtain the detected rotational position and stop the motor only when the fiber optic rotating junction is in a predetermined rotational position. In some embodiments, the motor includes a hollow shaft through which at least a portion of the fiber optic rotating junction extends.
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Citations
27 Claims
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1. A drive assembly for driving an imaging catheter having a rotatable fiber and a rotatable drive shaft, the drive assembly comprising:
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a fiber optic rotating junction having a stationary portion with a stationary fiber therein and a rotatable portion with a rotatable fiber therein; a first optical connection configured to connect the stationary fiber with a light source; a motor configured to rotate the rotatable portion of the fiber optic rotating junction; a second optical connection configured to connect the rotatable portion of the fiber optic rotating junction with both the drive shaft and the rotatable fiber of the imaging catheter so as to transmit torque from the motor to the drive shaft and the rotatable fiber of the catheter and so as to transmit light from the light source to the rotatable fiber of the catheter; a sensor configured to detect a rotational position of the fiber optic rotating junction; and a processor configured to obtain the detected rotational position and stop the motor only when the fiber optic rotating junction is in a predetermined rotational position. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of driving an imaging catheter having a rotatable fiber and a rotatable drive shaft, the method comprising:
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connecting a stationary fiber of a stationary portion of a fiber optic rotating junction in a drive assembly with a light source; connecting a rotatable fiber of the fiber optic rotating junction with the drive shaft and the rotatable fiber of the imaging catheter; rotating the rotatable portion of a fiber optic rotating junction with a motor in the drive assembly such that both the drive shaft and the rotatable fiber of the imaging catheter rotate and such that light is transmitted from the light source to the rotatable fiber of the imaging catheter; sensing a position of the fiber optic rotating junction; and stopping the motor based upon the sensed position only when the fiber optic rotating junction is in a predetermined rotational position. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A drive assembly for driving an imaging catheter having a rotatable fiber and a rotatable drive shaft, the drive assembly comprising:
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a fiber optic rotating junction having a stationary portion with a stationary fiber therein and a rotatable portion with a rotatable fiber therein; a first optical connection configured to connect the stationary fiber with a light source; a motor configured to rotate the rotatable portion of the fiber optic rotating junction, the motor having a hollow shaft configured to house a portion of the fiber optic rotating junction such that the motor and the fiber optical rotating junction are coaxial; a second optical connection configured to connect the rotatable portion of the fiber optic rotating junction with both the drive shaft and the rotatable fiber of the imaging catheter so as to transmit torque from the motor to the drive shaft and the rotatable fiber of the catheter and so as to transmit light from the light source to the rotatable fiber of the catheter; and an alignment mechanism configured to align the drive assembly with the imaging catheter so as to place the rotatable fiber in a predetermined rotational position for rotational alignment with the stationary fiber. - View Dependent Claims (14, 15, 16)
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17. A drive assembly for driving an imaging catheter having a rotatable fiber and a rotatable drive shaft, the drive assembly comprising:
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a drive assembly housing; a fiber optic rotating junction within the housing having a stationary portion with a stationary fiber therein and a rotatable portion with a rotatable fiber therein; a first optical connection through the housing configured to connect the stationary fiber with a light source; a motor in the housing configured to rotate the rotatable portion of the fiber optic rotating junction; a linear slide in the housing configured to translate the fiber optic rotating junction axially within the housing; and a second optical connection through the housing configured to connect the rotatable portion of the fiber optic rotating junction with both the drive shaft and the rotatable fiber of the imaging catheter so as to transmit torque from the motor to the drive shaft and the rotatable fiber and so as to transmit light from the light source to the rotatable fiber of the catheter. - View Dependent Claims (18, 19, 20, 21)
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22. A drive assembly for driving an imaging catheter having a rotatable fiber and a rotatable drive shaft, the drive assembly comprising:
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a fiber optic rotating junction having a stationary portion with a stationary fiber therein and a rotatable portion with a rotatable fiber therein; a first optical connection configured to connect the stationary fiber with a light source; a motor configured to rotate the rotatable portion of the fiber optic rotating junction; a second optical connection configured to connect the rotatable portion of the fiber optic rotating junction with both the drive shaft and the rotatable fiber of the imaging catheter so as to transmit torque from the motor to the drive shaft and the rotatable fiber of the catheter and so as to transmit light from the light source to the rotatable fiber of the catheter; and a magnetic locking mechanism configured to automatically align the second optical connection with the drive shaft and the rotatable fiber of the imaging catheter.
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23. A drive assembly for driving an imaging catheter having a rotatable fiber and a rotatable drive shaft, the drive assembly comprising:
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a drive assembly housing; a fiber optic rotating junction within the housing having a stationary portion with a stationary fiber therein and a rotatable portion with a rotatable fiber therein; a first optical connection through the housing configured to connect the stationary fiber with a light source; a motor within the housing configured to rotate the rotatable portion of the fiber optic rotating junction; a second optical connection through the housing configured to connect the rotatable portion of the fiber optic rotating junction with both the drive shaft and the rotatable fiber of the imaging catheter so as to transmit torque from the motor to the drive shaft and the rotatable fiber of the catheter and so as to transmit light from the light source to the rotatable fiber of the catheter; and an alignment mechanism configured to align the drive assembly with the imaging catheter so as to place the rotatable fiber in a predetermined rotational position for rotational alignment with the stationary fiber; wherein the housing is less than 75 cubic inches in volume, and wherein the drive assembly has a total weight of less than 2 pounds. - View Dependent Claims (24, 25, 26, 27)
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Specification