Blood Pressure Module for Chart

General Information

 
The MLS370 Blood Pressure Module for Windows automatically detects, analyzes and reports a set of cardiovascular parameters from arterial or ventricular pressure signals, either online or offline.

The Blood Pressure Module should be used with the latest version of Chart. Click here for the latest Chart Update for Windows.

The Classifier View allows for easy selection of pressure waveforms for further analyses. Pressure cycles that are contaminated by artifact, have abnormal cycle heights or cycle durations (frequency) can be excluded using the classifier. In addition, the classifier can be used to select pressure cycles that have increased frequency and/or amplitude for analysis. For example, increased heart rate in response to pharmacological agents is easily identified by a group of pressure cycles with decreased duration.

Recording showing ventricular parameters with markers, the average pressure waveform
(shown in black) and the individual cycles that constitute the average (shown in green).

The Analysis View displays pressure cycles beat-by-beat or as the average of a specified number of cycles. Depending on the type of signal under investigation (ventricular or arterial), commonly reported parameters specific to the type of signal (i.e. systolic pressure, EDP etc.) are labelled. These measurements are logged in the Table View for easy exporting.

The module also allows for these measurements to be displayed in Chart as continuous data on separate channels. Raw data is unaltered by any calculations ensuring that the ventricular or arterial signals can be re-analyzed at any time.

Features and Benefits

• Suitable for analysis of blood pressure from humans as well as large and small animals
• Blood pressure can be analyzed in real time during acquisition
• BP Classifier for detection and exclusion of atypical waveforms
• Several parameters can be displayed as continuous data on separate channels as well as logged to the Table View
• Averages any number of pressure waveforms

Detection & Analysis Settings

The BP Settings dialog is used to set blood pressure detection parameters. The detection algorithm uses minimum cycle height and minimum cycle duration, with each detected cycle labelled. By selecting ventricular or arterial pressure, specific waveform parameters are calculated by the Module. Cycle averaging and isovolumic relaxation (Tau) options are also set in the window.

BP Settings Dialog

Classifier View

The Classifier View allows selection of cycles based on height and duration. The edges of the red boxes represent the cycle classification limits and can be dragged using the mouse to include or exclude detected cycles, in the analyses.

Classifier View

Analysis View

Every beat, as well as the average of beats, is displayed in the Analysis View with vertical markers displayed for each ventricular or arterial cycle parameter. Scrolling horizontally will display each beat or average of beats in succession.

Analysis View with markers

Table View

All parameters calculated by the Module are recorded in the Table View. Table rows are linked to beats in the Analysis View so that highlighting a row will automatically show the corresponding beat(s) in the Analysis View as well as the original data in the Chart View.

Table View

Some of the calculated ventricular parameters include:

• Maximum Pressure
• Maximum dP/dt
• Isovolumic Relaxation

• Minimum Pressure
• Minimum dP/dt
• Mean Pressure

• End Diastolic Pressure (EDP)
• Maximum-Minimum Pressure
• Contractility Index

Some of the calculated arterial parameters:

• Systolic Pressure
• Ejection Time

• Diastolic Pressure
• Pressure at Dicrotic Notch

• Mean Pressure
• Pulse Pressure

The Blood Pressure Module is also available as part of Chart Pro. Visit the Chart Pro information page prior to making a purchasing decision. Existing Chart users and PowerLab system purchasers can upgrade to Chart Pro at a special price. If you need more information please contact your ADInstruments representative.

For more information download the Blood Pressure Module brochure (169 KB) or contact your nearest ADInstruments Representative.