1, the inventory work was monotonous and heavy, and some nurses were lazy and careless when taking inventory, which led to false inventory registration, and no expired oxygen masks were found in the rescue vehicle.

2. Nurses lack a sense of responsibility, have bad work habits, are unfamiliar with the placement of goods and medicines, and often make mistakes when dispensing medicines.

3. Nurses don't have enough knowledge of first-aid equipment and drug management, especially junior nurses, and department training is not in place.

4. The quality inspector did not check the work in place, and did not find that the oxygen mask in the rescue car expired and was not corrected in time.