Pulse Lavage and Electrical Fields to Remove Biofilms from Cobalt-Chrome Surfaces: An In Vitro Study

Area of Science:

• Biomedical Engineering
• Infectious Diseases
• Materials Science

Background:

• Orthopedic implant-related infections are a significant clinical challenge.
• Biofilms on metallic implants contribute to persistent infections, necessitating effective removal strategies.
• Current treatments often involve surgery and prolonged antibiotic therapy.

Purpose of the Study:

• To evaluate the efficacy of electrical fields and pulse lavage in removing Staphylococcus epidermidis biofilm from metallic joint arthroplasty surfaces.
• To compare different combinations of pulse lavage (low and high pressure) and pulsed electrical fields for biofilm removal.

Main Methods:

• An in vitro study compared five treatment models against a control group.
• Treatments included low-pressure pulse lavage, high-pressure pulse lavage, pulsed electrical fields, and combinations thereof.
• Pulsed electrical fields were applied using 25 pulses at 15 V, with an irrigation time of 25 seconds.

Main Results:

• The combination of high-pressure pulse lavage and electrical fields demonstrated the highest effectiveness in removing biofilm from cobalt-chrome surfaces.
• Pulsed electrical fields alone showed effectiveness in biofilm removal under the tested conditions.

Conclusions:

• Pulsed electrical fields are effective in removing Staphylococcus epidermidis biofilm.
• The tested conditions for pulsed electrical fields and high-pressure pulse lavage combination show potential for clinical translation in treating infected medical devices.