Method and device for removing respiratory artefacts from measured blood pressure data
First Claim
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1. A method for removing artifacts caused by patient respiration in measured blood pressure data acquired invasively in the heart or an artery of the patient, comprising:
- acquiring the level of CO2 in the patient'"'"'s expired air as a respiratory signal during the blood pressure measurement by a sensor;
using the respiratory signal to approximate the artifacts caused by patient respiration by a data processing unit; and
removing the artifacts based on the respiratory signal by the data processing unit.
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Abstract
The invention relates to a method and a device for removing respiratory artefacts in invasive blood pressure measurements. The level of CO2 in the expired air is monitored during blood pressure measurement and used to approximate and remove the respiratory artifacts. In one embodiment, the respiratory frequency from the respiratory signal is extracted by identifying the end-tidal CO2 level for each breath. A model is derived for the respiratory artifacts using the respiratory frequency, and the model is subtracted from the measured blood pressure data.
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Citations
9 Claims
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1. A method for removing artifacts caused by patient respiration in measured blood pressure data acquired invasively in the heart or an artery of the patient, comprising:
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acquiring the level of CO2 in the patient'"'"'s expired air as a respiratory signal during the blood pressure measurement by a sensor; using the respiratory signal to approximate the artifacts caused by patient respiration by a data processing unit; and removing the artifacts based on the respiratory signal by the data processing unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification