IRCT20130210012419N3 IRCT 2018-12-14 Tehran University of Medical Sciences Effect of airway neural block on patient satisfaction during bronchoscopy Comparison of patient satisfaction during flexible bronchoscopy by local anesthesia done with lidocaine spraying or conjunctive use of airway neural block and lidocaine spraying 2018-12-21 anticipated 60 Complete https://irct.ir/trial/33438 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Not used, Assignment: Parallel, Purpose: Diagnostic, Randomization description: Randomization will perform with randomized block design and using of random number table. Sixty patients will place in 15 blocks. Within each block will be 4 patients, then the numbering of blocks will do using a random number table, in each block two patients belong to the intervention group and two other patients belong to the control group. The layout of the block's people in the two groups (intervention or control group) will be randomized with a random number table. Determination of all possible blocks will be based on the layout of individuals next to each other inside block and the block's number. The entry of individuals to each of the groups will be respectively the block's number choices and the layout in the block, Blinding description: The injection site for the nerve block will cover in all patients in group one and two with three small adhesives, and thus bronchoscopist will not aware of the patient group. Patient satisfaction will be measured in the recovery room and by the unaware nurse to the patient's group. N/A Comparison of patient satisfaction during flexible bronchoscopy by local anesthesia done with lidocaine spraying or conjunctive use of airway neural block and lidocaine spraying. Intervention 1: Control group: In control group, local anesthetic agent in form of lidocain solution 1% will be sprayed in certain points so called "spray as you go" method. In this method, 1% lidocaine solution will be sprayed on the vocal cords (4 milliliter), right main bronchus (2 milliliter ) and left main bronchus (2 milliliter) through working channel of bronchoscope. In case of insufficiency and patient discomfort, another 2 milliliter of lidocaine 1% would be sprayed as bolus agent where needed. Intervention 2: Intervention group: In the intervention group,Airway Nerve Block(ANB) will be added to the "spray as you go" method, . In ANB, three milliliters of lidocaine 1% will be injected into the cricothyroid membrane (to block recurrent laryngeal nerve ) and another 1.5 milliliters of lidocaine 1% will be utilized on both sides of the neck to block the superior laryngeal nerve. Undecided - It is not yet known if there will be a plan to make this available Justification or reason for indecision in sharing IPD is Given that this study has not yet been completed, it has not been decided yet.