the medical uses of silver include its use in wound dressings, creams, and as an antibiotic coating on medical devices. wound dressings containing silver sulfadiazine or silver nanomaterials may be used on external infections. the limited evidence available shows that silver coatings on endotracheal breathing tubes may reduce the incidence of ventilator-associated pneumonia. there is tentative evidence that using silver-alloy indwelling catheters for short-term catheterizing will reduce the risk of catheter acquired urinary tract infections.