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Related Experiment Videos

Hemocompatibility of titanium nitride.

I Dion1, C Baquey, B Candelon

  • 1Laboratoire de Biophysique, Université de Bordeaux II, France.

The International Journal of Artificial Organs
|October 1, 1992
PubMed
Summary
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Titanium nitride (TiN) coatings show promising hemocompatibility for left ventricular assist devices. Tests indicate good protein adsorption, low platelet retention, and minimal hemolysis, suggesting suitability for blood-contacting applications.

Area of Science:

  • Biomaterials Science
  • Medical Device Engineering
  • Cardiovascular Research

Background:

  • Left ventricular assist devices (LVADs) require materials with specific mechanical, tribological, thermal, and chemical properties.
  • Titanium nitride (TiN) and graphite are chosen for LVAD pump components due to their distinct characteristics.

Purpose of the Study:

  • To evaluate the in vitro hemocompatibility of TiN coating deposited via chemical vapor deposition.
  • To assess protein adsorption, platelet retention, and hemolysis of TiN in a blood-contacting context.

Main Methods:

  • Chemical vapor deposition (CVD) was used to apply TiN coatings.
  • In vitro tests included protein adsorption (albumin, fibrinogen), platelet retention, and hemolysis assays.
  • Results were compared against a reference medical-grade elastomer.

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Main Results:

  • TiN exhibited interesting protein adsorption profiles for albumin and fibrinogen compared to the reference elastomer.
  • Platelet retention test results for TiN were comparable to those of the reference elastomer.
  • The hemolysis percentage for TiN was found to be near zero.

Conclusions:

  • TiN coatings demonstrate favorable mechanical and tribological properties for LVAD applications.
  • The evaluated TiN coatings present encouraging blood tolerability, making them a viable candidate material for blood-contacting medical devices.
  • Further investigation into TiN's long-term performance in cardiovascular applications is warranted.