Reduced rotational mass motor assembly for catheter pump
First Claim
1. A catheter pump system comprising:
- an impeller;
a catheter body having a lumen in which fluid flows proximally therethrough during operation of the catheter pump system;
a drive shaft disposed inside the catheter body and coupled with the impeller at a distal portion of the drive shaft, the drive shaft configured such that rotation of the drive shaft causes the impeller to rotate; and
a motor assembly comprising;
a chamber, at least a portion of the chamber in fluid communication with the lumen of the catheter body;
a rotor disposed in the at least a portion of the chamber, the rotor mechanically coupled with a proximal portion of the drive shaft such that rotation of the rotor causes the drive shaft to rotate; and
a stator assembly disposed about the rotor and configured to cause the rotor to rotate,wherein the rotor includes a longitudinal rotor lumen therethrough, and wherein, during operation of the catheter pump system, the fluid flows from the lumen into the chamber such that at least a portion of the fluid flows proximally through the longitudinal rotor lumen.
3 Assignments
0 Petitions
Accused Products
Abstract
A catheter pump is disclosed. The catheter pump can include an impeller and a catheter body having a lumen in which waste fluid flows proximally therethrough during operation of the catheter pump. The catheter pump can also include a drive shaft disposed inside the catheter body. A motor assembly can include a chamber. The motor assembly can include a rotor disposed in the at least a portion of the chamber, the rotor mechanically coupled with a proximal portion of the drive shaft such that rotation of the rotor causes the drive shaft to rotate, the rotor including a longitudinal rotor lumen therethrough. The motor assembly can also comprise a stator assembly disposed about the rotor. During operation of the catheter pump, the waste fluid flows from the lumen into the chamber such that at least a portion of the waste fluid flows proximally through the longitudinal rotor lumen.
-
Citations
28 Claims
-
1. A catheter pump system comprising:
-
an impeller; a catheter body having a lumen in which fluid flows proximally therethrough during operation of the catheter pump system; a drive shaft disposed inside the catheter body and coupled with the impeller at a distal portion of the drive shaft, the drive shaft configured such that rotation of the drive shaft causes the impeller to rotate; and a motor assembly comprising; a chamber, at least a portion of the chamber in fluid communication with the lumen of the catheter body; a rotor disposed in the at least a portion of the chamber, the rotor mechanically coupled with a proximal portion of the drive shaft such that rotation of the rotor causes the drive shaft to rotate; and a stator assembly disposed about the rotor and configured to cause the rotor to rotate, wherein the rotor includes a longitudinal rotor lumen therethrough, and wherein, during operation of the catheter pump system, the fluid flows from the lumen into the chamber such that at least a portion of the fluid flows proximally through the longitudinal rotor lumen. - View Dependent Claims (2, 3, 4, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 22, 23, 28)
-
-
5. A catheter pump system comprising:
-
an impeller; a catheter body having a lumen in which fluid flows proximally therethrough during operation of the catheter pump system; a drive shaft disposed inside the catheter body and coupled with the impeller at a distal portion of the drive shaft, the drive shaft configured such that rotation of the drive shaft causes the impeller to rotate; and a motor assembly comprising; a chamber, at least a portion of the chamber in fluid communication with the lumen of the catheter body; a rotor disposed in the at least a portion of the chamber, the rotor mechanically coupled with a proximal portion of the drive shaft such that rotation of the rotor causes the drive shaft to rotate; and a stator assembly disposed about the rotor and configured to cause the rotor to rotate, wherein, during operation of the catheter pump system, all or substantially all of the fluid is drawn from the lumen of the catheter body distal the motor assembly such that the cooling fluid does not flow inside the chamber.
-
-
17. A catheter pump system comprising:
-
an impeller; a catheter body having a lumen therethrough, the impeller mechanically coupled with a distal portion of the catheter body; a guidewire guide tube disposed through the lumen from a proximal portion of the catheter pump system to a distal portion of the catheter pump system, the guidewire guide tube configured to receive a guidewire therein; an end cap secured to a proximal end portion of the guide tube, the end cap configured such that axial movement of the end cap relative to the catheter body causes the guidewire guide tube to be removed from the catheter pump system; and a resealable closure device disposed at a proximal portion of the catheter pump system, the closure device configured such that when the guidewire guide tube is removed from the catheter pump system, the closure device encloses the proximal portion of the catheter pump system. - View Dependent Claims (18, 19, 20, 21)
-
-
24. A catheter pump system comprising:
-
a pump including an impeller for pumping blood; a motor assembly for imparting rotation on the impeller through a drive shaft, the motor assembly comprising; a stator carrying electrical windings; and a rotor disposed in at least a portion of the stator, the rotor mechanically coupled with a proximal portion of the drive shaft; and a fluid supply system for delivering fluid to the pump during operation of the pump and returning at least some of the supplied fluid to a waste reservoir; wherein the fluid supply system comprises a fluid channel extending within the stator and a fluid pathway which passes outside the stator, wherein, during operation of the pump, at least a first portion of the returning fluid passes through the fluid channel and at least a second portion of the returning fluid passes through the fluid pathway. - View Dependent Claims (25, 26, 27)
-
Specification