The present disclosure includes various examples for cooling electronics within a medical device while preventing or reducing the risk of an interior of the medical device being contaminated with a pathogen. The present disclosure includes a medical device having an air deflector to deflect potentially contaminated air from infecting a patient or caregiver. The present disclosure also includes medical devices with disinfectant devices installed to disinfect air either before entering the medical device or before exiting the device. Other examples of the present disclosure include medical devices that are sealed from outside air and fluids, and which may include a cooling device on an exterior surface which may be cleaned and/or removed after each use.