• Data-Trax-Applications

Analysis in Data-Trax is divided into five types or kinds, each addressing specific analytical requirements.

Analyses of the First Kind —Wave-to-Wave Transforms
 

• Rate,

• Frequency,

• Period,

• Minimum,

• Maximum,

• Mean,

• RMS,

• Regular Integral,

• Absolute Value of Integral,

• First Derivative,

• Second Derivative,

• User Definable Channel Math Function,

• Digital Filter,

• Power,

• Gain Telegraph (25 amplifiers supported,

• Calculated Cardiogram Leads (4),

• Cardiac Angle,

• HRV Power (3 bands),

• Spirometry Volume.

Analyses of the Second Kind — Reduced Data

Functions in this class take a user-selected group of data points and “digests” them to a single value. These values are then saved to an on-board Journal where they can be saved or exported to other programs. There are currently 31 functions of this type available within the
Data-Trax software.

Analyses of the Second Kind that are supported, include:
 

• T1,
• Y1,
• T2,
• Y2,
• T2-T1,
• Y2-Y1,
• Maximum,
• Minimum,
• Maximum-Minimum,
• Mean,
• Mark,
• Count,
• Units,
• Standard Deviation,
• RMS,

• Maximum dV/dt,
• Minimum dV/dt,
• Mean dV/dt,
• dV1/dt,
• dV2/dt,
• Area,
• Integral,
• Absolute Value of Integral,
• Average of Maximums,
• Average of Minimums,
• Average of Means,
• Average Period,
• Count,
• Average of Maximum-Minimum.

Analyses of the Third Kind — Redisplayed Data

Redisplayed data involves the plotting of recorded data in an “Other than Y, T” format. Examples include the XY plot or the Fast Fourier Transform (FFT). Currently, Data-Trax 1.8 supports XY and FFT. Measurements of areas, segment lengths and slopes, as well as data point values are available as “Second Kind” analyses from these windows.

• View FFT Screenshot

Analyses of the Fourth Kind —Detected Data Conditions

Data-Trax software can be used to identify Regions of Interest (ROI) in recorded data. Measurements can be extracted from these detected data points or areas, and then, be sent to the Journal where the measurements can be included in a report. The measurements can also be exported in a variety of formats.

Data-Trax can detect events in two categories: general and specific. GENERAL events are the ones located in the Find dialog. Using stock parameters, Data-Trax can identify Minimums and Maximums, data above or below a specified level, or data at a particular time. The program can look for values at a mark containing a particular string, or any combination of these (e.g. look for a value 10 seconds after a comment containing the string “DRUG”). The Find command can be made to automatically drop the values that it finds into a tab-delimited table that can later be opened in Excel, Matlab, or other analysis programs.

• View Stimulator Window

SPECIFIC events are detected using algorithms to find the point or region of interest. The Left Ventricular End Diastolic Pressure (LVEDP) and finding R waves or P waves in an ECG are good examples. Detection of these data points requires specific software that resides in the Data-Trax program, accessible from the Auto Mark menu. AutoMark allows the user to choose a detection algorithm and a data set. When the detection algorithm is completed, the software marks the record with comments at the appropriate places. Commenting or marking in this context accomplishes two things; it identifies the data points that need to be operated on, and it also provides the user with visual cues as to whether or not the software did its job in detecting the points that it was to find. Data-Trax can be directed to export the found data as text or load it
into a user-defined script. The Auto Mark can currently detect LVEDP, the QRS components of the ECG dichrotic notch, maximal response for organ or tissue bath studies, and spikes.

• View Input/Output Window

• View Record and Automark the "R" wave

• View Capture "R" wave values

• Easily export "R" values to Excel or other analytical program for further analysis

Analyses of the Fourth Kind include:

• Auto Find: Min, Max, Threshold, Mark with Specific String, Time
• Auto Mark: R waves, LVEDP, Dichrotic Notch, Maximal Response, Spike Detection, ECG Analysis.

Analyses of the Fifth Kind — Scripting

It is impossible to include all of the analyses and plotting capabilities required for biological research in a single program. We have provided what we believe to be useful tools for the most
common kinds of analyses. In those circumstances where the built-in analysis tools fall short of what is required, we have provided a scripting function. A script is a program written in any of the languages supported by Data-Trax. Scripts appear as items in the Data-Trax Scripting menu. When elected, the script takes a user selected range of recorded data and executes the script on the data.

Scripting languages supported: DADiSP, Python, MatLab, LabView, C++.

Applications

• Cardiac Haemodynamics

• Organ Bath Studies