US 2010/0305506 A1 · Method for Correcting Medical Fluid Injection Pressures Based on Usage

Abstract

Certain embodiments of the invention are directed to a medical fluid injector of the type that uses a motor to drive fluid from a fluid container by receiving electrical energy from a power source. The medical fluid injector has a motor drive control that delivers electrical energy to the motor. The motor drive control measures electrical energy delivered to the motor and computes a pressure value of the fluid delivered based upon the measured electrical energy. This pressure value is computed utilizing a calibrated relationship between the electrical energy delivered to the motor and resulting fluid pressure from the fluid delivered. The control further tracks a time factor over an operative life of the motor and alters the calibrated relationship based upon the time factor.

Claims20

Dependent claims

A medical fluid injector, comprising:

a fluid container;
a motor for driving fluid from the fluid container;
and
a motor drive control that:
delivers electrical energy to the motor;
measures the electrical energy delivered to the motor;
computes a pressure value of the fluid delivered from the fluid container based upon the electrical energy that is measured, wherein the pressure value is computed utilizing a calibrated relationship between the electrical energy delivered and fluid pressure;
tracks a time factor over an operative life of the motor;
and
alters the calibrated relationship based upon the time factor.

7 more elements

Dependencies are inferred from the claim text.

Method for Correcting Medical Fluid Injection Pressures Based on Usage

Life of this patent

Method for Correcting Medical Fluid Injection Pressures Based on Usage

Life of this patent

Abstract

Claims20