The catheter insertion length is 1/3 from the tip of the nose to the earlobe.

According to a query on Baidu Education, we learned that the question: When giving oxygen through a nasal cannula, which of the following is inappropriate? () A. The oxygen cylinder is placed 1 meter away from the heater, B. The length of the catheter insertion is from the tip of the nose to the earlobe. 1/3, C. Change the nasal cannula 1 to 2 times a day, D. Remove the nasal cannula first and then turn off the oxygen. Answer: B. It can be seen from this that when giving oxygen through a nasal cannula, it is inappropriate to insert the catheter into a length of 1/3 from the tip of the nose to the earlobe.

A nasal cannula is a slender, rubber or plastic tube with holes in the top and sides that is inserted into the nasal vestibule. It is currently a commonly used oxygen supply tool in hospitals at all levels in China. Bilateral nasal catheters can also be used and inserted into the vestibules of both nostrils at the same time. This has good compliance, shallow insertion, and is easy for patients to accept.