Overcoming cardiovascular disease with a magnetically-steerable guidewire microrobot

March 05, 2019

DGIST research team succeeded in developing a microrobot that can reach the accurate location of cardiovascular disease such as the Chronic Total Occlusion by moving and steering the microrobot towards a desired direction inside complicated blood vessels. This research is expected to increase the success rate of treatment and shorten the time of cardiovascular disease surgery.

DGIST announced on February 27 that Professor Hongsoo Choi's team in the Robotics Engineering Department developed the 'Magnetically Controlled Microrobot' that can enhance the success rate of CTO treatment among myocardial infarctions through a joint research with Professor Byung-Ju Yi's team at Hanyang University and Professor Bradley J Nelson's team at idgenössische Technische Hochschule Zürich in Switzerland.

Since the guidewire used for percutaneous coronary intervention , which opens up the obstructed blood vessels, is controlled manually by a surgeon to change its direction and location, the success rate and speed of surgery had depended on the surgeon's skill. It had been difficult to control the exact location and direction as the surgeon had to manually set and push the guidewire with bent ends inside complex blood vessels or junction.

To overcome this limitation, Professor Choi's team applied flexible and biocompatible polymer as well as neodymium magnet that can control the direction and location with as external magnetic field. Using this, the team developed a cylindrical microrobot with a diameter of 500? and length of 4mm and attached it at the end of guidewire. The team developed an attachable guidewire soft microrobot that can steer the guidewire towards a desired direction by controlling the microrobot with the external magnetic field and enable a rectilinear motion through Master-Slave System .

The research team also succeeded in an experiment which mathematically calculates and predicts the microrobot's motion and penetrates complex blood vessels through the feedforward method to control the result, in order to realize flexible, nonlinear motions of microrobot. The team also succeeded in an experiment to reach a desired area in a 3D blood vessel model that imitates the coronary artery of heart and the biocompatibility of microrobot from a cell survival experiment.

The attachable guidewire microrobot developed by the research team enables rectilinear motions through precise control by magnetic field and Master-Slave system. This can reach a desired area inside the complex blood vessel much faster, which will help overcome the percutaneous coronary intervention of existing surgical method and increase the success rate and efficiency of surgery. It will also reduce the exposure of patient and surgeon to radiation from xray as well as blood vessel damage of patients because it can reach the disease part more quickly than the existing method.

Professor Hongsoo Choi in the Department of Robotics Engineering said "Compared to the existing method, using an attachable guidewire microrobot will shorten the time for heart disease surgery and increase the success rate by enabling the surgeon to find the cause of disease more accurately and faster for a stable surgery. Our research team will work harder to conduct follow-up research with related companies and develop products that can be used in medical sites."
Meanwhile, this R&D result was published as a cover paper on 'Soft Robotics', the most-renowned international journal in robot research, and was performed with the support by Ministry of Trade, Industry, and Energy as well as the Ministry of Science and ICT.

DGIST (Daegu Gyeongbuk Institute of Science and Technology)

Related Cardiovascular Disease Articles from Brightsurf:

Changes by income level in cardiovascular disease in US
Researchers examined changes in how common cardiovascular disease was in the highest-income earners compared with the rest of the population in the United States between 1999 and 2016.

Fighting cardiovascular disease with acne drug
Researchers from the European Molecular Biology Laboratory (EMBL) in Heidelberg and Stanford University have found the cause of dilated cardiomyopathy - a leading cause of heart failure - and identified a potential treatment for it: a drug already used to treat acne.

A talk with your GP may prevent cardiovascular disease
Having a general practitioner (GP) who is trained in motivational interviewing may reduce your risk of getting cardiovascular disease.

Dilemma of COVID-19, aging and cardiovascular disease
Whether individuals should continue to take angiotensin-converting enzyme inhibitors and angiotensin receptor blockers in the context of coronavirus disease 2019 (COVID-19) is discussed in this article.

Air pollution linked to dementia and cardiovascular disease
People continuously exposed to air pollution are at increased risk of dementia, especially if they also suffer from cardiovascular diseases, according to a study at Karolinska Institutet in Sweden published in the journal JAMA Neurology.

New insights into the effect of aging on cardiovascular disease
Aging adults are more likely to have - and die from - cardiovascular disease than their younger counterparts.

Premature death from cardiovascular disease
National data were used to examine changes from 2000 to 2015 in premature death (ages 25 to 64) from cardiovascular disease in the United States.

Ultrasound: The potential power for cardiovascular disease therapy
In the current issue of Cardiovascular Innovations and Applications volume 4, issue 2, pp.

Despite the ACA, millions of Americans with cardiovascular disease still can't get care
Cardiovascular disease (CVD) is the leading cause of death for Americans, yet millions with CVD or cardiovascular risk factors (CVRF) still can't access the care they need, even years after the implementation of the Affordable Care Act (ACA).

Excess weight and body fat cause cardiovascular disease
In the first Mendelian randomization study to look at this, researchers have found evidence that excess weight and body fat cause a range of heart and blood vessel diseases (rather than just being associated with it).

Read More: Cardiovascular Disease News and Cardiovascular Disease Current Events
Brightsurf.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.