Clinical application of nitrous oxide/oxygen inhalation sedation in pediatric dentistry;

Methods 300 cases of induced-abortion patients were random divided into two groups:150 cases were used for anaesthesia of uterine cavity and nitrous oxide anaesthesia respectively,150 cases as control group.

Status quo of research on ways of oxygen inhalation in domestic;

This paper analyses the defects of bubble oxygen inhalators currently used,and investigates into their solutions for improvement.

Points out the necessary and important meaning of the verification of oxygen inhalator and describes the working principle and troubleshooting of the inhalator.