CPC A61M 60/833 (2021.01) [A61B 17/12136 (2013.01); A61B 17/12168 (2013.01); A61M 60/135 (2021.01); A61M 60/205 (2021.01); A61M 60/216 (2021.01); A61M 60/422 (2021.01); A61M 60/857 (2021.01); A61B 2017/12127 (2013.01); A61M 2205/505 (2013.01); A61M 2205/52 (2013.01); A61M 2205/80 (2013.01); A61M 2230/005 (2013.01); A61M 2230/20 (2013.01); A61M 2230/30 (2013.01)] | 13 Claims |
1. An apparatus, comprising:
a blood pump comprising:
a catheter;
a first impeller disposed on the catheter;
a second impeller disposed on the catheter, proximally to the first impeller;
a series of one or more shafts extending from the motor to the first impeller and from the first impeller to the second impeller; and
a motor configured to be disposed outside a body of a subject and configured to drive the first and second impellers to pump blood of a subject, by the motor imparting rotational motion to the first and second impellers via the one or more shafts when the first and second impellers are in non-radially-constrained configurations,
wherein the blood pump has one or more characteristics selected from the group consisting of: (a) the first and second impellers are shaped differently from each other, when the first and second impellers are in non-radially-constrained configurations, (b) the first and second impellers are sized differently from each other, when the first and second impellers are in non-radially-constrained configurations, and (c) the first and second impellers are driven by the motor to rotate under respective rotation conditions that are different from each other.
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