Pressure-Volume Data Acquisition with BioBench

The following information also is located in the BioBench User Manual (linked below).

To acquire and display two signals (in this example, pressure and volume) in real time on an XY graph, complete the following steps. This example also shows you how to initiate data acquisition after a specified delay.

1. Complete steps 1 through 4 of Getting Started with BioBench Data Acquisition (linked below) to assign LV Pressure, LV Volume, and ECG to three channels.



2. Select Configure»Settings, then select the Timing tab in the dialog box that appears. Set up the Timing tab as follows.



1. Click on the Start Time, After Specified Delay radio button and enter text in the Delay Duration field in hh:mm:ss format. For example, if you want to initiate data acquisition 2 minutes and 35 seconds after clicking the GO button, enter 2:35.



2. Select the desired sample rate from the Sample Rate pull-down list. In this example, a sample rate of 100 samples per second is selected.



3. Prepare to take a 30-second snapshot of data by clicking on the Stop Time, After Specified Duration radio button and entering 30.0.


3. Click on OK to confirm your settings.



4. With BioBench you can view real-time data in a variety of formats by using the View menu. You can display up to eight graphs of data simultaneously. In this example, select View»XY Graph Acquisition to view the data as an XY graph as follows.



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5. Select the # Points to Display on the XY graph by entering the number of points you want BioBench to display or by using the slide control. In this example, displaying 1,000 points with a sample rate of 100 samples per second profiles the last 10 seconds of data in the XY Graph.



6. Use the pull-down lists for the X and Y axes to select the desired signal for each axis. In this example, select the pressure signal for the Y axis and the volume signal for the X axis.



7. Click on the Log Data check box in the Logging area to log your data. See step 9 from Getting Started with BioBench Data Acquisition (linked below) for more information about data logging options.



8. Start data acquisition by clicking on the GO button. The Pressure-Volume Loops display in the XY Graph while the pressure and volume data displays independently on the two lower graphs.



9. Stop data acquisition by clicking on the STOP button.

Related Links:
BioBench User Manual

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