Scaling data to ohms is important in the IMP analysis application, as these values are used for calculating statistics such as stroke volume and cardiac output. If you are using a MW Mobile, you will see that the channel is already in the proper units even though there is no scaling applied. For Z o set m = 10 and Units to “ohms”įor dZ/dt, set m = 1 and Units to “ohms/sec” On this screen, change the Scaling Type to “Slope Intercept”. On the BioLab Configuration screen, press the Preview Scaling button next to one of the cardiac impedance channels to open the scaling window. Scaling cardiac impedance data in BioLab allows you to view the data in actual units during acquisition, which can be useful in determining data quality. Regardless of whether you have the Impedance Cardiograph & GSC 2 or an older version, the scaling for the cardiac impedance channels is the same: There is only one BioNex module used to collect cardiac impedance: the Impedance Cardiograph & GSC module. If you are acquiring data with a MindWare Mobile, this data is scaled to the appropriate units automatically. However if you are using different hardware such as a BioNex Impedance Cardiograph & GSC module or a 3rd party system, you have to scale this data manually. This article will discuss the various ways of scaling data from volts to these more appropriate units in BioLab and the IMP Analysis application. It’s derivative, dZ/dt, is measured in ohms per second. Cardiac impedance is typically measured in ohms.
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