Fungal nail infections can be caused by three different types of fungus, alone or in combination. 1  Dermatophytes are a type of fungus that can grow on the skin, hair, and nails. 2  They don't invade the deeper tissues of the body. 3  The most common dermatophyte, Trichophyton rubrum, causes most cases of athlete's foot.
Negative Airflow. Negative airflow is the opposite of postive airflow its having more exhaust fans then intake fans, this is good because its always taking new air into the case, but then you have more dust because the intake is mostly coming from gaps in the case and then causing trapped air.
With a non-rebreather mask, you should be using O2 flows >10LPM, and more like 15 LPM. The NRB requires higher flow rates because when the patient inhales, the reservoir bag deflates, and at lower flow rates, the bag will completely deflate and cut off supplemental O2 flow. Those masks aren't completely sealed, so the patient will continue to breathe room air once the reservoir bag is empty.