Features:
1) Minor irritancy, little mechanical obstruction of respiratory tract,
acceptability, which are compared with tracheal tube
2) Cardiovascular system response is petty when insert or pull out and
post-operation throat discomfort has little possibility to happen
3) Easy to control, insert directly, no need to use laryngoscope
4) The new type is inserted into respiratory tract quickly in nature, and
no need using other aid means
5) Repeatable to use

Applications:
1) Can be applied to first-aid, ICU and any acute disease treatment
2) For those patients to whom intubatton is difficult
3) Patients who need special position of operation on head or back
4) Examination tracheal, laryngeal and elimination of impurities
5) Patients who do not want to use tracheal tube