DuraPulse for Heart Valve Durability Testing Applications

In heart valve durability testing, it was previously impossible to achieve high-frequency testing and independent sample pressure control. With the Bose® DuraPulse™ test instrument (Figure 1), high-frequency testing and independent sample pressure control capabilities are raised to a new level.

The Bose® DuraPulse™ test instrument

Figure 1. The Bose® DuraPulse™ test instrument

Key Specifications of the Bose® DuraPulse™ Test Instrument

The key specifications of the Bose® DuraPulse™ test instrument are summarized in the following table:

DuraPulse™ System Specifications
Frequency 15 - 30+ Hz
Temperature Up to 40°C
Valve Size Up to 40mm
Valve differential pressure Up to 500mmHg
Number of Samples 2, 4 or 6
Data Acquisition Rate 5kHz

Key Features and Advantages of the Bose® DuraPulse™ Test Instrument

The Bose® DuraPulse™ test instrument provides unprecedented waveform control by automatically adjusting settings to key target test conditions and reducing overshoot of target transvalvular pressures by means of closed-loop feedback control. As a result, the time required for setting and adjusting conditions can be reduced. Moreover, potential valve damage caused by high pressure can be mitigated by maintaining overshoot under 10%.

The exclusive chamber design of the Bose® DuraPulse™ test instrument enables performing tests across a broad range of frequencies. The equipment supports frequencies higher than 30Hz and facilitates shortened overall testing time.

The Bose® DuraPulse™ test instrument controls each sample independently irrespective of the count of samples being analyzed. A specific sample run is not affected when other samples are removed and adjusted. The transparent chambers of the Bose® DuraPulse™ test instrument allow users to investigate the test valve from the front, sides and back. Furthermore, they can be used with high-speed imaging methods.

The user-friendly Bose® DuraPulse™ test instrument minimizes overall setup and take-down time as it does not require system tuning and bleed air. Quick-open chambers and fast filling and draining process are the other factors.

The versatile Bose® DuraPulse™ test instrument is capable of testing any kind of surgical or transcatheter heart valve prosthesis such as biomaterial, tissue, mechanical, pulmonary, tricuspid, pediatric, mitral and aortic valves.

The Bose® ElectroForce® proprietary motor is used to run tests. The friction-free, bearing-free motor runs reliably for billions of cycles with zero maintenance.

Application-Specific Software

The Bose WinTest® software package (Figure 2) helps the Bose DuraPulse test instrument to achieve quick setup for test conditions and data collection in addition to continuous feedback control.

The Bose WinTest® software package

Figure 2. The Bose WinTest® software package

Heart Valve Durability Testing Applications

The complete portfolio of heart valve device and component testing instruments from Bose can be used for the following applications:

  • Planar biaxial characterization of valve leaflet materials
  • Axial-torsion testing of catheters and guidewires
  • Radial fatigue testing of valve stent structures
  • Linear fatigue testing of materials and components in single-sample and multi-sample configurations
  • Assessing hydrodynamic valve performance

Conclusion

The Bose® DuraPulse™ test instrument provides minimal pressure overshoot, high-frequency testing capabilities, independent sample control and the proven consistency of Bose test instruments.

This information has been sourced, reviewed and adapted from materials provided by TA Instruments.

For more information on this source, please visit TA Instruments.

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