1. Objective:To explore disinfection method for internal canula in .

2. Nozzle. Canula , and orifice features may be varied to suit particular requirements, provided these are within the practicabilities of the impact extrusion process on a mass-production basis.

3. The left carotid artery was dissected and canula was inserted and connected with respective line.

4. Canula, and orifice features may be varied to suit particular requirements, provided these are within the practicabilities of the impact extrusion process on a mass-production basis.

5. Objective:To explore disinfection method for internal canula in . tracheotomy.

6. The correlation between the pathological change of parotid canula and age.

7. Increase the amount of transfusion can depress dynamic lung compliance and delay trachea canula extubated time.

8. Conclusions The health education to patients with PICC in applying canula period was an important factor for PICC indwelled safely.