The utility model belongs to the technical field of
medical instruments, and discloses a
pneumothorax treatment device which comprises one-way valves, catheters, a gas-water separation device, a
piston assembly and a waste liquid bag
assembly, the gas-water separation device comprises a first cavity and a second cavity, the catheters comprise a first
catheter, a second
catheter and a third
catheter, the one-way valves comprise a first one-way valve and a second one-way valve, and the
piston assembly comprises a
piston assembly and a waste liquid bag assembly. The first one-way valve is connected with a first cavity of the gas-water separation device through a first guide
pipe and used for inputting gas and liquid into the gas-water separation device in a one-way mode, the second one-way valve is connected with a second cavity of the gas-water separation device through a second guide
pipe, and the piston assembly is connected with the second cavity of the gas-water separation device. The waste liquid bag assembly is connected with the piston assembly through a third guide
pipe. An inlet and an outlet of the device are provided with one-way valves, only one-way output can be achieved, and the gas-liquid
backflow phenomenon is avoided; an inclined channel is formed between the two cavities, and the water absorption piece assembly is arranged in the second cavity, can absorb a small amount of liquid and can be normally used after being inclined.