Patent ID: 9599521
Date: 2017-03-21
CPC Classifications: A61B,G01K

Claim:
1. Apparatus for correcting a measured value from a sensor coupled to a patient, comprising: at least one sensor, which is configured to be coupled to a body of the patient so as to measure a physiological parameter of the body; a patient monitor having a two leads connector for measuring the physiological parameter by applying an internal monitor voltage or an internal monitor current through the patient monitor's connector to the sensor; an active conversion unit, which is coupled between the at least one sensor and the patient monitor connector; the active conversion unit is configured to determine at least the internal monitor voltage or the internal monitor current by connecting at least one known resistance, and measuring corresponding voltage or current across the two lead connector; the active conversion unit further determines a new auxiliary signal based on the determined internal monitor voltage or the internal monitor current, and determines a corrected value; and wherein, the active conversion unit applies the new auxiliary signal to the patient monitor through the two lead connector, the active conversion unit actively causes the patient monitor to display the corrected value of the physiological parameter instead of displaying the measured value of the physiological parameter measured by the at least one sensor.