Patent ID: 11872339
Assignee: AVITA CORPORATION
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 8:
9. A channel forming method for a nasal mucus suction device for preventing backflow which comprises an air pump and a head structure, wherein the air pump comprises an intake tube and an outlet tube, and the head structure has a channel defined between a nasal mucus suction inlet and a gas outlet, wherein the channel has a first channel section in communication with the nasal mucus suction inlet and a second channel section in communication with the gas outlet, wherein the channel forming method comprises: disposing at least one mucus storage cavity in the first channel section, wherein the at least one mucus storage cavity comprises a first mucus storage cavity and a second mucus storage cavity; and disposing a noise reduction space in the second channel section and in communication with the outlet tube of the air pump; disposing an inner cup in the first channel section, wherein the inner cup has the first mucus storage cavity, which is in communication with the nasal mucus suction inlet; disposing an outer cup in the first channel section, wherein the outer cup has the second mucus storage cavity, which in communication with the intake tube of the air pump and configured to accommodate at least one part of the inner cup, so that the nasal mucus overflowing from the first mucus storage cavity is accommodated in the second mucus storage cavity; disposing a cup lid having an opening and covering a cup edge of the inner cup; and disposing a cup cover having a flow guidance tube that is coupled to the cup lid, so that while the flow guidance tube passes through the opening of the cup lid, the flow guidance tube guides nasal mucus from the nasal mucus suction inlet to flow into the first mucus storage cavity; wherein the first channel section is arranged in a manner that, before flowing into the second mucus storage cavity, nasal mucus overflowing from the first mucus storage cavity flows through the gap between the flow guidance tube and the cup lid first, and then flows through the another gap between the inner cup and the outer cup.