TTR2 includes a laptop PC with “Blockwise Radial Force” application software preinstalled. The software is intuitive and powerful; new users can get meaningful results within a few minutes. Context-sensitive help concisely describes all controls and displays.
The software helps the user calculate “radial strength” of balloon-expandable stents, and “chronic outward force (max and min)” of self-expanding stents, as described in the testing standard ASTM 3067.
Several types of test sequence are available, including manual settings of diameter or radial force, ramp, cycle, or arbitrary user-defined diameter sequences. Test data can be written to .csv files for analysis by a spreadsheet program.
Radial force can be displayed, graphed, and saved in various forms and units, including radial force per length, hoop force, hoop force per length, and pressure.
For test very low-force devices, a “Friction Compensation” feature can be used to remove most of the compression station’s internal friction from the results.