Arterial Blood Pressure
- From the AcqKnowledge home screen select: Open a graph file, Graph file on Disk, and click OK
- This will allow you to access files directly from theU T: Drive
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- Minimize all channels except Channels 5 & 9 that correspond to CNAP Blood Pressure & ECG respectively, by clicking on the triangle icon on the left hand slide of the channel number.
![](https://osabrainresearch.atlassian.net/wiki/download/thumbnails/70090791/image2016-11-2%208:1:24.png?version=1&modificationDate=1478098888286&cacheVersion=1&api=v2&height=400)
- Using the magnifying glass tool, zoom into a small region of the CNAP Blood Pressure channel.
- Using your cursor, click on a small region in the waveform and drag. A blue selection box will appear, indicating that your are expanding/zooming into this region.
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- Your goal is to expand the channel waveform so that all systoles are visible.
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- Go to Analysis →Hemodynamics → and select "Arterial Blood Pressure" from the options menu
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- From the Arterial Blood Pressure preferences window enter the following settings & select OK:
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- You can also select to Estimate Cardiac Output Analysis here as well or you can follow the steps listed below.
- Highlight a single systole in the BP data and select "Systole Is Selected"
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- Acq will now perform the Arterial BP Analysis and populate results onto an excel spread sheet and it will display QRS intervals on ECG channel, dp/dt waveforms, & recovery % set to 70% on CNAP waveform.
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Estimate Cardiac Output
- To Estimate Cardiac Output from ABP, Go to Analysis →Hemodynamics → and select "Estimate Cardiac Output" from the options menu
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- From the Estimate CO from ABP preferences menu, enter the following settings:
- ABP channel: CH5, CNAP Blood Pressure
- Estimated initial cardiac output: Select Avg male resting CO for MALE subjects & Avg resting CO for FEMALE subjects
- Analyze: Focus Areas Only
- Display Results as: Excel Spreadsheet Only
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- Estimated Cardiac Output results are populated onto an excel spreadsheet.
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