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An In vitro System to Gauge the Thrombolytic Efficacy of Histotripsy and a Lytic Drug

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Reprogrammable Soft Swimmers for Minimally Invasive Thrombus Extraction.

Anna V Pozhitkova¹, Daniil V Kladko¹, Denis A Vinnik²

¹International Institute "Solution Chemistry of Advanced Materials and Technology", ITMO University, St. Petersburg 197101, Russia.

ACS Applied Materials & Interfaces

|May 10, 2022

Summary

This study introduces magnetic soft robots for minimally invasive thrombosis treatment. These robots can navigate, hook, and extract blood clots, offering a safer alternative to traditional methods.

Keywords:

medical soft robots minimally invasive surgery reprogrammable magnetization thrombosis untethered

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Area of Science:

Biomedical Engineering
Robotics
Cardiovascular Research

Background:

Thrombosis is a leading global cause of mortality.
Current treatments for thrombosis are often invasive and carry significant risks.
Soft magnetic robots offer potential for remote actuation and minimally invasive procedures.

Purpose of the Study:

To develop and evaluate reprogrammable magnetic soft robots for thrombosis treatment.
To demonstrate the robots' ability to penetrate, hook, and extract plasma clots.
To assess the efficacy of these robots in a vein-mimicking system.

Main Methods:

Design and fabrication of shape-switching, bioinspired soft swimmers.
Locomotion control using rotating magnetic fields in vein-mimicking conditions.
Demonstration of clot hooking and extraction capabilities, with and without fibrinolytic agents.

Main Results:

Soft robots exhibited efficient locomotion, comparable to natural swimmers.
Successful hooking of plasma clots for an average of 3.1 ± 1.1 minutes.
Demonstrated minimally invasive thromboextraction from a vein-mimicking system.

Conclusions:

Reprogrammable magnetic soft robots present a promising novel approach for thrombosis treatment.
This technology offers a potential solution to overcome the drawbacks of conventional invasive methods.
Further development could lead to safer and more effective clinical interventions for thrombotic diseases.