Magnetic Soft Robot for Minimally Invasive Urethral Catheter Biofilm Eradication

Area of Science:

• Biomedical Engineering
• Materials Science
• Infectious Diseases

Background:

• Catheter-related biofilm infections pose significant risks to patient health, increasing morbidity and mortality.
• Current prevention methods are insufficient, necessitating costly and invasive catheter replacement.
• Soft magnetic robots present a novel approach for targeted medical interventions.

Purpose of the Study:

• To investigate the efficacy of soft magnetic robots in eradicating biofilm from urethral catheters.
• To develop and test various magnetic soft robot designs for biofilm removal.
• To establish a minimally invasive method for treating catheter-associated biofilm contamination.

Main Methods:

• Fabrication and characterization of seven distinct soft magnetic robot designs (4.5 × 15 mm).
• Testing robot performance in biofilm removal from a 20 Fr urethral catheter model under a rotating magnetic field.
• Evaluating biofilm eradication efficiency based on robot design, frequency (15 Hz), and magnetic field amplitude (10 mT).

Main Results:

• The octagram-shaped magnetic soft robot demonstrated superior biofilm removal efficiency.
• Full eradication of biofilm was achieved with the octagram-shaped robot at a velocity of 2.88 ± 0.6 mm/s.
• The magnetic robot approach proved minimally invasive, safe, and effective for catheter biofilm elimination.

Conclusions:

• Soft magnetic robots are a promising, minimally invasive technology for treating catheter-associated biofilm infections.
• This approach can potentially extend catheter usage duration and reduce the frequency of replacement and treatment.
• Further development could lead to improved patient outcomes and reduced healthcare costs associated with catheter complications.