Trachea cannula with phlegm suction cavity

The utility model relates to a trachea cannula with a phlegm suction cavity and relates to a medical gas suction apparatus, in particular to a trachea cannula used for tracheotomy. The trachea cannula comprises a cannula body, a respirator interface and a balloon and further comprises an airway inner tube and a negative pressure suction tube interface. The two ends of the airway inner tube are connected with the cannula body in a sealed mode, and the phlegm suction cavity of an interlayer structure is formed in the cannula body. The airway inner tube is communicated with the phlegm suction cavity through phlegm discharge holes distributed in the airway tube wall. The phlegm suction cavity is communicated with an external negative pressure suction device through the negative pressure suction tube interface, the negative pressure suction tube interface is connected to the upper end of the cannula body and close to the respirator interface, and a one-way valve capable of being opened outwards is arranged on the