[…] manufacturer regarding the compatibility of the to‐be‐used agent with the probes. The ultrasound transducer handle may also be a reservoir for microbial contaminants and a potential source of cross‐infection. In some instances, patients come into direct contact with handles or indirect contact may occur via the healthcare provider’s hands or probe cover. It is also recommended that probe handles should be disinfected according to the manufacture’s recommendations 7,8 . Environment Cleaning and Disinfection A recent study sampled trans‐abdominal and trans‐vaginal transducer cords, keyboards and gel 9. Skin and environmental organisms were isolated along with the opportunistic pathogens. The study recommended a review of current guidelines to include keyboard and cord disinfection and gel handling. Other areas, such as the examination bed and rails, door handles and benchtop surfaces, may also act as sources of cross‐infection. Infection prevention and control measures should include hand hygiene prior to and following every examination. Exam tables, rails and keyboards should be disinfected after each patient. Probe holders, cords and gel bottles should be cleaned and disinfected at the start and end of each day. Gel bottles should never be "topped‐up". Empty bottles should be cleaned and disinfected prior to refilling. The ultrasound machine should be cleaned at least once a week. Page 3 of 3 Conclusion Adequate probe reprocessing and procedure set up is essential. The level of preparation depends on the type of examination performed. Routine high‐level disinfection of internal probes between patients is mandatory, plus the use of a high‐quality single‐use probe cover to avoid gross contamination during the examination. Given the recent evidence that HPV may not be sensitive to the commonly employed high‐level disinfectants, it seems prudent to employ disinfectants that use oxidizing chemistries. The manufacturer’s recommendations should be followed in order to avoid damaging the probes. Other basic infection prevention and control measures, including hand hygiene and environmental cleaning and disinfection, are also essential to prevent the transmission of pathogens in medical ultrasound. References 1. Rutala WA, Weber DJ. Sterilization, high‐level disinfection, and environmental cleaning. Infect Dis Clin North Am 2011; 25:45‐76. 2. Leroy, SJ, Infectious Risk of endovaginal transrectal ultrasonography, Journal of Hospital Infection, 83(2):99–106, 2012. 3. M’Zali et al. Persistence of microbial contamination on transvaginal ultrasound probes despite low‐level disinfection procedure. PLoS One 2014;9:e93368. 4. Canadian Standards Association. Z314.8‐14 Decontamination of Reusable Medical ...
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