Calibration of in vivo blood pressure sensors

A - Human Necessities – 61 – B

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A61B 5/02 (2006.01)

Patent

CA 2615609

A method for performing an in-vivo calibration of a blood pressure sensor (40) that is associated with a balloon (10) of an in-vivo balloon system, the sensor and balloon being associated such that the sensor is in-vivo when the balloon is in-vivo. The balloon is inflated so that a gas pressure in the balloon system is indicative of a patient's blood pressure. The patient's blood pressure is monitored through two channels, the gas pressure and the sensor. The blood pressure measurements obtained by monitoring the gas pressure are used as reference, or "true," blood pressure measurements to determine a mathematical relationship between blood pressure measurements obtained through the sensor and the reference blood pressure measurements. In this manner, future blood pressure measurements obtained through the sensor can be modified according to the mathematical relationship to generate calibrated blood pressure measurements.

La présente invention concerne un procédé permettant d'effectuer un étalonnage in vivo d'un capteur de pression sanguine (40) associé à un ballonnet (10) d'un système de ballonnet in vivo, ce capteur et ce ballonnet étant associés de sorte que le capteur soit in vivo lorsque le ballonnet est in vivo. Ce ballonnet est gonflé de façon qu'une pression de gaz dans le système de ballonnet indique la pression sanguine d'un patient. La pression sanguine du patient est surveillée à travers deux canaux, la pression du canal et le capteur. Les mesures de pression sanguine obtenues par la surveillance de la pression du gaz sont utilisées comme référence, ou comme mesure de pression sanguine vraies pour déterminer une relation mathématique entre des mesures de pression sanguine obtenues par le capteur et les mesures de pression sanguine de référence. De cette façon, des mesures de pression sanguine futures obtenues par le capteur peuvent être modifiées en fonction de la relation mathématique afin de générer des mesures de pression sanguine étalonnées.

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