Tracheal tube

A device, comprising:

• a catheter comprising a first portion and a second portion, the first portion comprising a first hole and a second hole, and the second portion comprising a third hole and a fourth hole;
• a gas-charging tube comprising a first end and a second end;
• a suction tube comprising a first end and a second end;
• and
• an inflatable balloon disposed on the second portion of the catheter;
• wherein:
• the inflatable balloon comprises a flange, and the inflatable balloon is fixed on the second portion via the flange;
• the first end of the gas-charging tube is disposed outside the catheter, and the second end of the gas-charging tube enters the catheter via the first hole and extends to connect to the third hole;
• the first end of the suction tube is disposed outside the catheter, and the second end of the suction tube enters the catheter via the second hole and extends to connect to the fourth hole;
• the third hole is located in and communicate with the inflatable balloon;
• the fourth hole is disposed outside the inflatable balloon;
• the inflatable balloon is sheathed on the catheter to form a first surface and a second surface;
• the first surface is between the third hole and the fourth hole;
• the first surface is oriented to be non-perpendicular to a central line of the catheter;
• and
• the fourth hole is adjacent to the first surface, and no gap exists between the fourth hole and the first surface.