Investigating of the Effect of Aromatherapy with lavender on the Satisfaction, Pain and Physiological indicators of Patients undergoing endoscopic retrograde

INTERVENTION: Intervention 1: Before the endoscopy, four drops of lavender essential oil with a concentration of 2% (product of Zardband company) will be dripped on sterile gauze and placed on the chest of patients in the intervention group, and they will be asked to inhale it for 30 minutes. Intervention 2: Control group: Before the endoscopy, four drops of normal saline are dripped on sterile gauze and placed on the chest of control group patients, and they will be asked to inhale it for 30 minutes. CONDITION: ????????? ?????? ?????. ; Obstruction of bile duct K83.1 PRIMARY OUTCOME: Pain. Timepoint: Before and after the intervention. Method of measurement: Pain Visual Numerical Questionnaire. Physiological index. Timepoint: Before and after the intervention. Method of measurement: ?????? ???? ???? ????. Satisfaction. Timepoint: Before and after the intervention. Method of measurement: Satisfaction questionnaire. SECONDARY OUTCOME: Allergy to lavender. Timepoint: After intervention for 3 days. Method of measurement: Examining side effects caused by medication by asking the patient. INCLUSION CRITERIA: No history of drug sensitivity Having the necessary cooperation to perform the procedure Not receiving analgesics before and after the procedure in the control and intervention groups The same anesthesia protocol Not having a smell problem