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Controller for intravascular catheter system

  • US 5,336,167 A
  • Filed: 07/22/1991
  • Issued: 08/09/1994
  • Est. Priority Date: 07/22/1991
  • Status: Expired due to Fees
First Claim
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1. An intravascular catheter system comprising:

  • a catheter member having a rotatable tip attached to a flexible rotatable shaft;

    a fluid path for permitting fluid flow towards said rotatable tip;

    common means for injecting fluid into said fluid path and thereafter rotating said shaft, said common means monitoring both said rotatable shaft and said fluid flow and disabling both the rotation of said shaft and said fluid flow upon detecting an error with respect to either the rotation of said shaft or said fluid flow;

    wherein said common means includes first means for controlling the injection of said fluid, second means for controlling the rotation of said shaft, and processor means for providing signals causing programmed operation of said first and second means;

    wherein said first means includes a first motor operable at a first programmed speed to control said injection of said fluid;

    wherein said second means includes a second motor operable at a second programmed speed to rotate said shaft;

    wherein said common means further includes operator controlled input means coupled to said processor means for being operated to cause said processor means to provide signals to said first and second means to operate said first and second motors at said respective first and second programmed speeds;

    wherein said processor means includes first and second processors;

    wherein said first processor, in response to said input means, provides signals to said first and second means for controlling the speed of said first and second motors respectively;

    wherein said first processor, in response to signals from said first means, monitors the operation of said first motor;

    wherein said second processor, in response to signals from said second means, monitors the speed of said second motor and provides an error signal manifesting an error condition in the event the speed of said second motor is different than the second programmed speed; and

    wherein said first processor, in response to either said second processor error signal or an error in the operation of said first motor, renders inoperative said first and second motors.

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