How to use LabVIEW Biomedical Toolkit - Noninvasive BP (Blood Pressure) Analyzer

[Liqian]

Noninvasive Blood Pressure (NIBP) Analyzer

The Noninvasive Blood Pressure (NIBP)Analyzer in Biomedical Workbench of LabVIEW Biomedical Toolkit provides the functionality of noninvasive blood pressure analysis for research purposes.

To use the NIBP Analyzer, you must have the following hardware components:

• NI ELVIS II with prototyping board
• Pressure sensor
• Blood pressure cuff

For example, the following figure illustrates how to assemble the hardware components of the NIBP Analyzer with Vernier Blood Pressure Sensor.

Setting Up the NIBP Analyzer Hardware Components

The NIBP Analyzer uses the following channels from NI ELVIS II to measure and control the hardware components.

NI ELVIS II Channel                Component

AI port                                          Pressure Sensor

Complete the following steps to take accurate collection with the blood pressure sensor.

Please refer to Vernier Blood Pressure for NI ELVIS II for more details.

Complete the following steps to measure blood pressure using the NIBP Analyzer.

1. Select Noninvasive BP Analyzer from the Biomedical Workbench.  Two blank charts will be displayed in a separate window.
2. Switch the Boolean to From DAQ and click on DAQ Settings, select the device corresponding to NI ELVIS II Series in the Device name drop-down menu.
3. Select the corresponding channel from the Physical channel drop-down menu and enter a name for the channel (eg: BP). This is the channel from which the program will acquire data.
4. Select Vernier Blood Pressure – mmHg in the Sensor scaling drop-down menu. This will tell the Analyzer to automatically use the correct calibration for the blood pressure sensor.
5. Set the Max and Min Input Range as 150mmHg and 0mmHg. Leave other settings at their default values.
6. Click the checkmark button in the right side of Channel Settings to add the channel.
7. Look over the other settings. Leave these as their default values. Click the OK button.  Press the Help button on the NIBP Analyzer window to pull up a Help window that explains the details about each of these settings.

Note When the inflation and deflation process finishes, the blood pressure measurement process stops automatically. To end the blood pressure measurement process immediately, you can click the Stop button.

The following figure is an example of the results of a blood pressure measurement.

The NIBP Analyzer dialog box displays the real-time blood pressure plot in the top waveform graph. The pulse wave amplitude profile displays in the bottom waveform graph. The estimated blood pressure displays in the top right corner.

Complete the following steps to load a blood pressure file to process using the NIBP Analyzer.

1. Select Noninvasive BP Analyzer from the Biomedical Workbench.  Two blank charts will be displayed in a separate window.
2. Switch the Boolean to From File and click on File Settings. A pop-up window named File Settings will show up on your screen.
3. Select the file you want to play from the File path control.
4. Select the channel in the File contents column.
5. Click the OK button.
6. Click the Start button to display the blood pressure results.

[Patrick_NI]

Why can't you use an NI 9237 as an input module?  When you try to select it in the DAQ Settings, none of the physical channels show up.

[ZJ.Gu]

Hi,

Currently all the Apps in Biomedical Toolkit only supports Voltage input channel. Therefore, 9237 has no channels to select. We will consider to add more in future release. Thanks for your report.

ZJ

[Edgar_Guevara]

Hi,

Is there any way to export the processed data, i.e. the pulse wave amplitude profile? Maybe as .tdms or any other format.

Thanks

[ZJ.Gu]

Currently no. The analysis VI is provided in VI library, so you could write some codes in LabVIEW to get the data and save to file.

[Edgar_Guevara]

That's great, I didn't know. Thanks for your prompt reply