Abstract: Provided is a dressing, including: a skin-friendly layer, a fluid transport structure, and an upper cover. The skin-friendly layer has first extraction guide holes and first injection guide holes. The fluid transport structure, formed on the skin-friendly layer, has an extraction guide groove, second extraction guide holes, an injection guide groove and second injection guide holes, wherein the extraction guide groove separates from the injection guide groove, the second extraction guide holes are formed in the extraction guide groove and communicate with the first extraction guide holes, and the second injection guide holes are formed in the injection guide groove and communicate with the first injection guide holes. The upper cover, formed on the fluid transport structure, has an extraction hole communicating with the extraction guide groove and the second extraction guide holes, and an injection hole communicating with the injection guide groove and the second injection guide holes.

Abstract: A respiratory auxiliary apparatus is provided, having a nozzle tube formed axially in an air outlet channel of a mask. The air outlet end of the nozzle tube facing the air outlet one-way valve of the air outlet channel gradually reduces the diameter. Vertically corresponding to the center axis of the outlet end, at least one through hole is provided between the side wall of the outlet channel and the side wall of the nozzle tube to communicate the outside of the outlet channel with the inside of the nozzle tube. When the exhaled air passes through the nozzle tube, the air from the outside of the outlet channel is sucked into the nozzle tube to increase the airflow accordingly to the Bernoulli's principle, and enough force is generated when the airflow blows from the nozzle tube to push open the one-way valve to discharge the exhaled carbon dioxide.