Locally-administered antibiotics in wounds in a limb

Area of Science:

• Orthopedics
• Infectious Disease
• Biomaterials Science

Background:

• Contaminated musculoskeletal defects pose a significant risk of infection.
• Current treatments, like polymethylmethacrylate (PMMA) mixed with antibiotics, have limitations.
• A need exists for effective, easily administered local antibiotic delivery systems.

Purpose of the Study:

• To evaluate the efficacy of amikacin-loaded, rapidly-resorbing calcium-sulphate pellets in reducing bacterial load in a goat musculoskeletal defect model.
• To compare the performance of these pellets against standard antibiotic-loaded PMMA.
• To identify advantages of the calcium-sulphate pellet system.

Main Methods:

• A goat model with surgically created contaminated musculoskeletal defects was utilized.
• Rapidly-resorbing calcium-sulphate pellets containing amikacin were prepared and implanted.
• Local bacterial counts were assessed post-treatment.
• Comparison was made with antibiotic-loaded PMMA implants.

Main Results:

• Amikacin-loaded calcium-sulphate pellets rapidly eradicated local bacteria.
• The pellets demonstrated comparable efficacy to antibiotic-loaded PMMA.
• The pellets were fully absorbed, eliminating the need for removal surgery.
• Complete antibiotic release and no adverse effects were observed.

Conclusions:

• Locally administered amikacin via rapidly-resorbing calcium-sulphate pellets is a highly effective method for reducing bacterial contamination in wounds.
• This innovative approach presents significant advantages over conventional PMMA antibiotic delivery systems.
• This treatment holds promise for decreasing infection rates in contaminated wounds.