Radial ultrasound capsule and system
A reusable rotating ultrasound capsule for mounting to a distal end of a catheter. An exemplary device includes a motor compartment having a proximal face and a distal end. A sensor compartment includes a cap that seals with the motor compartment. A motor located within the motor compartment includes a drive component and a shaft rotatably coupled to the drive component and extending distally from the motor compartment into the sensor compartment. The shaft includes an ultrasound transducer. A plurality of electrical contacts are mounted on the proximal face. At least two of the electrical contacts are electrically coupled to the motor. A rotational electrical coupler includes a rotational component mechanically coupled to the shaft and electrically coupled to the ultrasound transducer and a stationary component mechanically coupled to the motor compartment and electrically coupled to one or more of the plurality of electrical contacts.
1 . A radial ultrasound device comprising:
a catheter comprising a proximal end, a distal end, and a lumen extending from the proximal end to a side exit port adjacent the distal end, wherein the distal end includes a capsule coupling mechanism;
a reusable ultrasound capsule comprising:
a housing removably couplable with the distal end of the catheter to mechanically and electrically connect the reusable ultrasound capsule to the distal end of the catheter, the housing having a same diameter as a distal face of the distal end of the catheter, wherein a proximal face of the housing includes a coupler configured to be received by the capsule coupling mechanism to removably mechanically and electrically couple the housing to the distal end of the catheter, the housing comprising:
a motor compartment forming a proximal portion of the housing; and
a cap sealed to a distal face of with the motor compartment forming a sensor compartment;
a motor located within the motor compartment, the motor including a shaft extending distally from the motor compartment into the sensor compartment; and
an ultrasound transducer coupled to the shaft.
2 . The device of claim 1 , wherein the motor compartment includes a plurality of electrical contacts mounted on the proximal face, wherein at least two electrical contacts of the plurality of electrical contacts are electrically coupled to the motor.
3 . The device of claim 2 , wherein the distal face of the catheter includes a second plurality of electrical contacts electrically couplable to the plurality of electrical contact mounted on the proximal face of the motor compartment.
4 . The device of claim 3 , wherein the motor compartment includes:
a rotational electrical coupler comprising:
a rotational component mechanically coupled to the shaft and electrically coupled to the ultrasound transducer; and
a stationary component mechanically coupled to the motor compartment and electrically coupled to one or more of the plurality of electrical contacts.
5 . The device of claim 1 , wherein the motor compartment comprises a width dimension being perpendicular to a motor compartment longitudinal axis, wherein the width dimension is less than 3 mm.
6 . The device of claim 1 , wherein the motor compartment comprises a width dimension being perpendicular to a motor compartment longitudinal axis, wherein the width dimension is less than 2 mm.
7 . The device of claim 1 , wherein the cap comprises one or more materials that are permeable to an ultrasound signal.
8 . The device of claim 7 , wherein the sensor compartment is filled with a fluid configured to transfer an ultrasound signal.
9 . A radial ultrasound capsule system comprising:
a reusable ultrasound capsule comprising:
a housing including a motor compartment and a sensor compartment formed by a cap sealed to the motor compartment, the motor compartment including a motor having a rotating shaft extending distally into the sensor compartment; and
an ultrasound transducer coupled to the rotating shaft; and
a catheter comprising:
a proximal end comprising an access port; and
a distal end comprising a distal face of a same diameter as a proximal face of the ultrasound capsule and distal face includes a capsule coupling mechanism to removably receive the proximal face of the motor compartment of the housing of the ultrasound capsule,
wherein the housing includes a coupler extending proximally from the proximal face of the motor compartment and configured to be received by the capsule coupling mechanism to removably mechanically and electrically couple the housing to the distal end of the catheter.
10 . The system of claim 9 , wherein the distal end of the catheter includes a plurality of electrical contacts to electrically couple the catheter to the ultrasound capsule.
11 . The system of claim 9 , wherein the cap includes two orientation pins oriented parallel to a longitudinal axis of the cap less than 180° from each other along an arc of the cap.
12 . The system of claim 9 , wherein the catheter includes:
a side exit port located proximal from the distal face;
at least one lumen configured to extend from the access port to the exit port; and
a ramp located at a distal end of one of the at least one lumen.
13 . The system of claim 9 , wherein the motor compartment includes a rotational electrical coupler comprising:
a rotational component mechanically coupled to the shaft and electrically coupled to the ultrasound transducer; and
a stationary component mechanically coupled to the motor compartment and electrically coupled to one or more of a plurality of electrical contacts electrically coupling the ultrasound capsule to the catheter.
14 . The system of claim 9 , wherein the coupler on the ultrasound capsule comprises a plug extending from the proximal face of the housing,
wherein the capsule coupling mechanism of the catheter comprises a recess adapted to receive the plug,
wherein the plug is configured to thread or snap into the recess to allow the ultrasound capsule and the catheter to mechanically and electrically couple the ultrasound capsule to the catheter.