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.

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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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