Oxygen saturation detection device provided with inflatable air bag

The utility model discloses an oxygen saturation detection device provided with an inflatable air bag, which comprises a transparent catheter; one end of the transparent catheter is closed, and the other end of the transparent catheter is provided with an opening; a main air bag is sheathed close to the end part of the closed end of the transparent catheter; an inner cavity is internally provided with a monitoring probe and a lead; the monitoring probe is positioned at the area surrounded by the main bag; one end of the lead is connected with the monitoring probe, and the other end of the lead extends outside the transparent catheter and is connected with a joint; the wall of the transparent catheter is internally buried with an air injection pipe; and one end of the air injection pipe is communicated with the main air bag, and the other end of the air injection pipe extends outside the transparent catheter and is communicated with an auxiliary air bag. The detection device is arranged in the transparent cath