Patent ID: 11925794
Assignee: PULSECATH B.V.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 7:
8. A catheter pump system comprising:
a catheter for insertion into a patient into a position extending through an aorta of the patient such that a distal end portion of the catheter can be located near or extend through an aortic valve of the patient, the catheter having an inlet port at or near a distal end and an outlet port proximally of the inlet port and communicating with the inlet port via a blood flow channel;
a pump having a fluid displacement member in the blood flow channel;
a pneumatic motor for driving the pump;
a flexible drive shaft extending through the catheter, the drive shaft coupling the pump to the motor;
a motor controller for controlling motor speed, the motor controller having:
a supply channel extending through the motor controller between an inlet for connection to a pressure source and an outlet in fluid communication with the motor,
a variable restriction valve connected and arranged for controlling flow through the supply channel, and
an input interface for inputting control signals to the motor controller;
wherein the variable restriction valve is arranged for reducing flow through the supply channel and allowing an increase of flow through the supply channel in response to control signals received via the input interface.