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Interventional Removal of Travelling Microthrombi Using Targeted Magnetic Microbubble.

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A novel interventional method uses targeted-magnetic-microbubbles to detect and remove microthrombi, a complication of COVID-19. This technique successfully reduced microthrombus concentration by over 60% in animal models within minutes.

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Area of Science:

  • Biomedical Engineering
  • Cardiovascular Research
  • Nanotechnology

Background:

  • Microthrombi contribute significantly to the severe complications of Corona Virus Disease 2019 (COVID-19), leading to embolism and necrosis.
  • The small size and erratic movement of microthrombi pose challenges for in vivo detection and removal.
  • Current treatments for microthrombi are limited, necessitating innovative approaches.

Purpose of the Study:

  • To develop and evaluate an interventional method for the targeted identification and removal of traveling microthrombi.
  • To utilize targeted-magnetic-microbubbles (TMMBs) for both drug delivery and magnetic capture of microthrombi.
  • To assess the efficacy and safety of this method in preclinical animal models.

Main Methods:

  • Development of TMMBs coated with thrombus-targeting drugs and containing magnetic nanoparticles.
  • Utilization of an interventional magnetic catheter for capturing TMMB-microthrombus complexes.
  • Proof-of-concept experiments conducted in rat models to evaluate microthrombus reduction.

Main Results:

  • The TMMB-based method demonstrated targeted adhesion to microthrombi.
  • The interventional magnetic catheter effectively captured the TMMB-microthrombi.
  • Microthrombus concentration was reduced by over 60% within 3 minutes in rat models.
  • No significant organ damage was observed during the procedure.

Conclusions:

  • The developed interventional method using TMMBs and a magnetic catheter shows promise for treating microthrombus-related issues.
  • This approach offers a potential solution for the early detection and efficient removal of traveling microthrombi.
  • Further research may validate this technique for clinical application in managing COVID-19 sequelae and other thrombotic conditions.