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Thrombogenicity of deflated intraaortic balloon: impact of heparin coating
X M Mueller1, H T Tevaearai, D Hayoz
1Clinic for Cardiovascular Surgery, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland. Xavier.Mueller@chuv.hospvd.ch
Insights
Heparin-coated intraaortic balloons (IAB) significantly reduced clot formation compared to standard IAB in a calf model. This suggests heparin coatings offer a promising alternative to systemic anticoagulation for preventing IAB-related complications.
Area of Science:
- Cardiovascular Research
- Biomaterials Science
- Medical Device Engineering
Background:
- Intraaortic balloons (IAB) are crucial in cardiovascular support.
- Standard IAB can lead to vascular complications, including clot formation.
- Systemic anticoagulation carries inherent risks.
Purpose of the Study:
- To evaluate the thrombogenicity of heparin-coated intraaortic balloons (IAB) compared to standard IAB.
- To assess the potential of heparin coatings to mitigate clot formation on deflated IAB.
Main Methods:
- A calf model was used to simulate IAB deployment.
- Standard and heparin-coated IAB were left deflated in the descending aorta for 20 minutes.
- Scanning electron microscopy (SEM) was employed to analyze IAB surfaces for clots and deposits.
Main Results:
- All standard IAB exhibited significant clot formation and surface deposits.
- None of the heparin-coated IAB showed any signs of clot or deposit.
- SEM analysis confirmed no deposits on heparin-coated samples, while 8 of 9 standard samples had deposits (p < 0.001).
Conclusions:
- Heparin-coated IAB demonstrate a significant reduction in thrombogenicity compared to standard IAB.
- The absence of clots on heparin-coated devices suggests a promising role in preventing vascular complications associated with IAB.
- Heparin coatings may offer an alternative to systemic anticoagulation for IAB procedures.
Abstract:
In a calf model, 3 standard and 3 heparin coated intraaortic balloons (IAB) were inserted and left deflated in the descending aorta during 20 min to simulate balloon rupture. At the end of the experiment, the IAB were examined, and 3 samples of each were collected for scanning electron microscopy (SEM) analysis. None of the heparin coated IAB showed any sign of clot or deposit whereas all 3 standard IAB exhibited clots. SEM revealed no deposit on the heparin coated samples while 8 of the 9 standard samples disclosed deposits (p < 0.001). Morphometrically, 16.1+/-21.4% of the surfaces of the standard samples were covered with deposits whereas all the heparin coated samples were free (p = 0.004). The presence of clots on every standard IAB supports the hypothesis that other than local factors of the insertion site can play a role in the vascular complications of IAB. The absence of clots and deposits on the heparin coated IAB suggests a promising role of such devices in circumventing the tendency of clot formation on deflated balloons while avoiding the drawback of systemic anticoagulation.