BIS of Sedation Depth During Flexible Bronchoscopy.

Bispectral Index Monitoring of Sedation Depth During Flexible Bronchoscopy: With or Without Fentanyl .

Fentanyl is analgesia medication. There has not pain nerve in the lung. Flexible bronchoscopy(FB) is used in the respiratory medicine. So people will not feel pain in the process of FB. The purpose of the study is to know if Fentanyl is useful in the conscious sedation of FB.

Fentanyl is opioid receptor agonists. It is a fast-acting, short duration and potent analgesics.

Flexible bronchoscopy (FB) is mostly used in the diagnosis and therapy in the respiratory disease. As we know, there has not pain nerve in the lung. People will not feel pain when they are in FB.

If fentanyl will be effective in FB? Our study will observe the effect of conscious sedation in FB with fentanyl or without fentanyl.

Inclusion Criteria:

Cough reflex is good agree to do bronchoscopy agree to take part in the study no the contraindication of bronchoscopy

Exclusion Criteria:

Forced expiratory volume in one second<1 L severe hemoptysis severe heart, liver,kidney failure psychiatric and nervous disorders allergic to the anesthetic ( fentanyl, midazolam, or propofol)