Motor assembly for catheter pump

Abstract

A catheter pump is disclosed herein. The catheter pump can include a catheter assembly that comprises a drive shaft and an impeller coupled to a distal end of the drive shaft. A driven assembly can be coupled to a proximal end of the drive shaft within a driven assembly housing. The catheter pump can also include a drive system that comprises a motor and a drive magnet coupled to an output shaft of the motor. The drive system can include a drive assembly housing having at least one magnet therein. Further, a securement device can be configured to prevent disengagement of the driven assembly housing from the drive assembly housing during operation of the pump.

1 - 20 . (canceled) 
     
     
         21 . A mechanical circulatory support device for stabilizing a patient after cardiogenic shock, the mechanical circulatory support device comprising:
 a catheter pump including an impeller and a flexible drive shaft for rotating the impeller, the catheter pump being insertable through a cardiovascular system of the patient to locate the impeller at the patient's heart;   a motor assembly producing a torque for rotating the impeller of the catheter pump at a predetermined speed via the flexible drive shaft to increase the flow of blood out of the patient's heart and through the patient's vascular system; and   at least one damping component configured to reduce a vibration of the motor assembly while operating to produce the torque.   
     
     
         22 . The mechanical circulatory support device of  claim 21 , wherein the at least one damping component is further configured to reduce noise of the motor assembly while operating to produce the torque. 
     
     
         23 . The mechanical circulatory support device of  claim 21 , wherein the vibration damping component is provided between the motor assembly and the catheter pump. 
     
     
         24 . The mechanical circulatory support device of  claim 23 , wherein the vibration damping component comprises a stabilizing O-ring. 
     
     
         25 . The mechanical circulatory support device of  claim 21 :
 wherein the motor assembly includes a plurality of motor windings, an output shaft, and a rotatable drive magnet coupled to the output shaft.   
     
     
         26 . The mechanical circulatory support device of  claim 25 , wherein the at least one damping component is disposed radially around the output shaft. 
     
     
         27 . The mechanical circulatory support device of  claim 25 , wherein the at least one damping component is provided between separable housings of the motor assembly and the catheter pump. 
     
     
         28 . The mechanical circulatory support device of  claim 21 :
 wherein the motor assembly includes a plurality of motor windings;   wherein the catheter pump includes a driven magnet coupled to the flexible drive shaft; and   wherein a rotation of the driven magnet is induced by magnetic fields generated the plurality of motor windings when the plurality of motor windings are energized.   
     
     
         29 . The mechanical circulatory support device of  claim 21 , wherein the motor assembly includes a motor and a motor housing, the at least one damping component applied between the motor and the motor housing. 
     
     
         30 . The mechanical circulatory support device of  claim 21 , wherein the motor assembly includes a motor and a motor mount, the at least one damping component applied between the motor and the motor mount. 
     
     
         31 . The mechanical circulatory support device of  claim 21 , wherein the at least one damping component includes a damping material of a visco-elastic or elastic polymer.