Intravascular forward-looking ultrasound transducers for microbubble-mediated sonothrombolysis.

Area of Science:

• Biomedical Engineering
• Cardiovascular Research
• Medical Devices

Background:

• Effective removal of large blood clots is crucial for treating acute thrombo-occlusive diseases.
• Current thrombolytic therapies often require high drug doses and face challenges in clot dissolution.

Purpose of the Study:

• To develop an intravascular microbubble-mediated sonothrombolysis device.
• To enhance thrombolytic rates and minimize the need for thrombolytic drugs.
• To investigate the efficacy of a novel sub-megahertz, forward-looking ultrasound transducer.

Main Methods:

• Development of custom miniaturized, forward-looking ultrasound transducers with integrated microbubble injection.
• In vitro testing of the device for inducing cavitation in lipid-shelled microbubbles.
• Assessment of thrombolysis rate using the developed sonothrombolysis technology.

Main Results:

• The developed transducers generated sufficient pressure to induce microbubble cavitation.
• Demonstrated a thrombolysis rate of 0.7 ± 0.15 percent mass loss/min in vitro.
• Achieved clot dissolution without the administration of thrombolytic drugs.

Conclusions:

• The novel intravascular microbubble-mediated sonothrombolysis device shows significant potential for treating blood clots.
• Sub-megahertz, forward-looking ultrasound technology enhances cavitation-induced microstreaming for efficient thrombolysis.
• This approach offers a promising alternative for reducing thrombolytic drug dosage in clinical settings.