0.9% saline 1 mL all patients received intranasal medication at approximately 45-60 min before induction of anesthesia.

Heart rate (HR) of patients receiving intranasal placebo or dexmedetomidine. HR was monitored in the study.

satisfaction using a 3-point satisfaction score (1 = highly satisfactory, 2 = acceptable, and 3 = unacceptable) anxiety levels using a 4-point anxiety score (1 = combative, 2 = anxious, 3 = calm, and 4 = amiable) were collected before intranasal drugs and at pre-induction.

Anxiety score >2 was considered to be better for the patient.

4-point anxiety score:

1. = combative
2. = anxious
3. = calm
4. = amiable. Anxiety score >2 was considered to be better for the preoperative patients.

Systolic blood pressure（SBP）of Patients Receiving Intranasal Placebo or Dexmedetomidine.

Patient satisfaction scores using a 3-point satisfaction score (1 = highly satisfactory, 2 = acceptable, and 3 = unacceptable) were collected when patients were discharged from the post-anesthesia care unit (PACU).

Satisfaction score <2 was considered to be better for the patient

Bradycardia was defined as heart rate (HR) <45 bpm for more than 10 s.

Tachycardia was defined as heart rate (HR) >100 bpm for more than 10 s.

Hypotension was defined as systolic blood pressure (SBP) decreased more than 30% of the pre-operative value for more than 1 min.

Hypertension was defined as systolic blood pressure (SBP) increased 130% of the pre-operative value for more than 1 min.

Baseline characteristic data of patients receiving intranasal placebo The heights of 41 adult patients receiving intranasal placebo

Baseline characteristic data of patients receiving intranasal dexmedetomidine The heights of 40 adult patients receiving intranasal placebo

Baseline characteristics (sex)of patients receiving intranasal placebo or dexmedetomidine The sex of 81 adult patients receiving intranasal placebo or dexmedetomidine

American Society of Anesthesiologists (ASA) status of patients receiving intranasal placebo or dexmedetomidine.

ASA I: No organic, physiologic, biochemical or psychiatric disturbance ASA II: A patient with mild systemic disease that results in no functional limitation.

ASA III: A patient with severe systemic disease that results in functional impairment.

ASA IV: Severe systemic disease that is a constant threat to life. ASA V: Moribund condition in a patient who is not expected to survive with or without the operation.

ASA VI: Declared brain death patient whose organs are being harvested for transplantation.

Duration from intranasal drug administration to arrival at operating room of patients receiving intranasal placebo surgical data of patients receiving intranasal placebo

Duration From Intranasal Drug Administration to Arrival at Operating Room of Patients Receiving Intranasal dexmedetomidine surgical data of patients receiving intranasal dexmedetomidine

Duration from intranasal drug administration to anesthesia intubation of Patients Receiving Intranasal Placebo surgical data of patients receiving intranasal placebo

Duration of minutes From Intranasal Drug Administration to Anesthesia Intubation of Patients Receiving Intranasal dexmedetomidine surgical data of Patients Receiving Intranasal dexmedetomidine.

Duration of anesthesia of patients receiving intranasal placebo Duration from anesthesia intubation to anesthesia ending

Duration of anesthesia of patients receiving intranasal dexmedetomidine Duration from anesthesia intubation to anesthesia ending

Duration of surgery of patients receiving intranasal placebo Duration from surgery beginning to anesthesia ending

Duration of surgery of patients receiving intranasal dexmedetomidine. Duration from surgery beginning to anesthesia ending

Modified OAA/S score of patients receiving intranasal placebo Before intranasal drugs Modified Observer's Assessment of Alertness/Sedation Scale (Modified OAA/S score) 6 Appears alert and awake, responds readily to name spoken in normal tone 5 Appears asleep but responds readily to name spoken in normal tone 4 Lethargic response to name spoken in normal tone 3 Responds only after name is called loudly or repeatedly 2 Responds only after mild prodding or shaking

1 Does not respond to mild prodding or shaking 0 Does not respond to noxious stimulus

Modified OAA/S score of patients receiving intranasal dexmedetomidine Before intranasal drugs Modified Observer's Assessment of Alertness/Sedation Scale (Modified OAA/S score) 6 Appears alert and awake, responds readily to name spoken in normal tone 5 Appears asleep but responds readily to name spoken in normal tone 4 Lethargic response to name spoken in normal tone 3 Responds only after name is called loudly or repeatedly 2 Responds only after mild prodding or shaking

1 Does not respond to mild prodding or shaking 0 Does not respond to noxious stimulus

Modified OAA/S score of patients receiving intranasal placebo at Pre-induction.

Modified Observer's Assessment of Alertness/Sedation Scale (Modified OAA/S score):

6 Appears alert and awake, responds readily to name spoken in normal tone 5 Appears asleep but responds readily to name spoken in normal tone 4 Lethargic response to name spoken in normal tone 3 Responds only after name is called loudly or repeatedly 2 Responds only after mild prodding or shaking

1 Does not respond to mild prodding or shaking 0 Does not respond to noxious stimulus

Modified OAA/S score of patients receiving intranasal dexmedetomidine at Pre-induction.

Modified Observer's Assessment of Alertness/Sedation Scale (Modified OAA/S score):

6 Appears alert and awake, responds readily to name spoken in normal tone 5 Appears asleep but responds readily to name spoken in normal tone 4 Lethargic response to name spoken in normal tone 3 Responds only after name is called loudly or repeatedly 2 Responds only after mild prodding or shaking

1 Does not respond to mild prodding or shaking 0 Does not respond to noxious stimulus

Modified OAA/S score of patients receiving intranasal placebo After extubation. Modified Observer's Assessment of Alertness/Sedation Scale (Modified OAA/S score) 6 Appears alert and awake, responds readily to name spoken in normal tone 5 Appears asleep but responds readily to name spoken in normal tone 4 Lethargic response to name spoken in normal tone 3 Responds only after name is called loudly or repeatedly 2 Responds only after mild prodding or shaking

1 Does not respond to mild prodding or shaking 0 Does not respond to noxious stimulus

Modified OAA/S score of patients receiving intranasal dexmedetomidine after extubation.

Modified Observer's Assessment of Alertness/Sedation Scale (Modified OAA/S score):

6 Appears alert and awake, responds readily to name spoken in normal tone 5 Appears asleep but responds readily to name spoken in normal tone 4 Lethargic response to name spoken in normal tone 3 Responds only after name is called loudly or repeatedly 2 Responds only after mild prodding or shaking

1 Does not respond to mild prodding or shaking 0 Does not respond to noxious stimulus

Anxiety score of Patients Receiving Intranasal Placebo Before Intranasal Drugs. The patients were taught to rate their anxiety levels using a 4-point anxiety score (1 = combative, 2 =anxious, 3 = calm, and 4 = amiable)

Anxiety score of Patients Receiving Intranasal dexmedetomidine Before Intranasal Drugs.

The patients were taught to rate their anxiety levels using a 4-point anxiety score (1 = combative, 2 =anxious, 3 = calm, and 4 = amiable)

Anxiety score of Patients Receiving Intranasal Placebo at Pre-induction. The patients were taught to rate their anxiety levels using a 4-point anxiety score (1 = combative, 2 =anxious, 3 = calm, and 4 = amiable)

Anxiety score of Patients Receiving Intranasal dexmedetomidine at Pre-induction.

The patients were taught to rate their anxiety levels using a 4-point anxiety score (1 = combative, 2 =anxious, 3 = calm, and 4 = amiable)

Satisfaction scores of patients receiving intranasal placebo. satisfaction was assessed using a 3-point satisfaction score(1 = highly satisfactory, 2 = acceptable, and 3 = unacceptable).

Satisfaction scores of patients receiving intranasal dexmedetomidine. Satisfaction used a 3-point satisfaction score(1 = highly satisfactory, 2 = acceptable, and 3 = unacceptable).

Time to spontaneous breathing of patients receiving intranasal placebo. The time elapsed between stopping anesthetic infusions and adequate ventilation

Time to spontaneous breathing of patients receiving intranasal dexmedetomidine. The time elapsed between stopping anesthetic infusions and adequate ventilation

Time to consciousness of patients receiving intranasal placebo. The time elapsed between stopping anesthetic infusions and consciousness.

Time to consciousness of patients receiving intranasal dexmedetomidine. The time elapsed between stopping anesthetic infusions and consciousness.

Time to extubation of patients receiving intranasal placebo. The time elapsed between stopping anesthetic infusions and extubation

Time to extubation of patients receiving intranasal dexmedetomidine. The time elapsed between stopping anesthetic infusions and extubation

Predicted effect-site concentrations of propofol after intranasal placebo at tracheal intubation.

Propofol was infused intraoperatively to a target-controlled infusion (TCI) plasma concentration of 2.5μg∙ml-1 using DiprifusorTM software. The infusion rate was adjusted via plasma concentration increments of 0.5 μg∙ml-1 at 2-min intervals to maintain the Narcotrend index between 'D0' and 'E1' until the end of surgery.

Predicted effect-site concentrations of propofol after intranasal dexmedetomidine at tracheal intubation.

Propofol was infused intraoperatively to a TCI plasma concentration of 2.5μg∙ml-1 using DiprifusorTM software. The infusion rate was adjusted via plasma concentration increments of 0.5 μg∙ml-1 at 2-min intervals to maintain the Narcotrend index between 'D0' and 'E1' until the end of surgery.

Predicted effect-site concentrations of propofol after intranasal placebo before inserting operative laryngoscope.

Propofol was infused intraoperatively to a TCI plasma concentration of 2.5μg∙ml-1 using DiprifusorTM software. The infusion rate was adjusted via plasma concentration increments of 0.5 μg∙ml-1 at 2-min intervals to maintain the Narcotrend index between 'D0' and 'E1' until the end of surgery.

Predicted effect-site concentrations of propofol after intranasal dexmedetomidine before inserting operative laryngoscope.

Propofol was infused intraoperatively to a TCI plasma concentration of 2.5μg∙ml-1 using DiprifusorTM software. The infusion rate was adjusted via plasma concentration increments of 0.5 μg∙ml-1 at 2-min intervals to maintain the Narcotrend index between 'D0' and 'E1' until the end of surgery.

Predicted effect-site concentrations of propofol after intranasal placebo on removal of operative laryngoscope.

Propofol was infused intraoperatively to a TCI plasma concentration of 2.5μg∙ml-1 using DiprifusorTM software. The infusion rate was adjusted via plasma concentration increments of 0.5 μg∙ml-1 at 2-min intervals to maintain the Narcotrend index between 'D0' and 'E1' until the end of surgery.

Predicted effect-site concentrations of propofol after intranasal dexmedetomidine on removal of operative laryngoscope.

Propofol was infused intraoperatively to a TCI plasma concentration of 2.5μg∙ml-1 using DiprifusorTM software. The infusion rate was adjusted via plasma concentration increments of 0.5 μg∙ml-1 at 2-min intervals to maintain the Narcotrend index between 'D0' and 'E1' until the end of surgery.

Predicted effect-site concentrations of propofol after intranasal placebo at return of spontaneous breathing.

Propofol was infused intraoperatively to a TCI plasma concentration of 2.5μg∙ml-1 using DiprifusorTM software. The infusion rate was adjusted via plasma concentration increments of 0.5 μg∙ml-1 at 2-min intervals to maintain the Narcotrend index between 'D0' and 'E1' until the end of surgery.

Predicted effect-site concentrations of propofol after intranasal dexmedetomidine at return of spontaneous breathing.

Propofol was infused intraoperatively to a TCI plasma concentration of 2.5μg∙ml-1 using DiprifusorTM software. The infusion rate was adjusted via plasma concentration increments of 0.5 μg∙ml-1 at 2-min intervals to maintain the Narcotrend index between 'D0' and 'E1' until the end of surgery.

Predicted effect-site concentrations of propofol after intranasal placebo at emergence.

Propofol was infused intraoperatively to a TCI plasma concentration of 2.5μg∙ml-1 using DiprifusorTM software. The infusion rate was adjusted via plasma concentration increments of 0.5 μg∙ml-1 at 2-min intervals to maintain the Narcotrend index between 'D0' and 'E1' until the end of surgery.

Predicted effect-site concentrations of propofol after intranasal dexmedetomidine at emergence.

Propofol was infused intraoperatively to a TCI plasma concentration of 2.5μg∙ml-1 using DiprifusorTM software. The infusion rate was adjusted via plasma concentration increments of 0.5 μg∙ml-1 at 2-min intervals to maintain the Narcotrend index between 'D0' and 'E1' until the end of surgery.

Predicted effect-site concentrations of propofol after intranasal placebo at extubation.

Propofol was infused intraoperatively to a TCI plasma concentration of 2.5μg∙ml-1 using DiprifusorTM software. The infusion rate was adjusted via plasma concentration increments of 0.5 μg∙ml-1 at 2-min intervals to maintain the Narcotrend index between 'D0' and 'E1' until the end of surgery.

Predicted effect-site concentrations of propofol after intranasal dexmedetomidine at extubation.

Propofol was infused intraoperatively to a TCI plasma concentration of 2.5μg∙ml-1 using DiprifusorTM software. The infusion rate was adjusted via plasma concentration increments of 0.5 μg∙ml-1 at 2-min intervals to maintain the Narcotrend index between 'D0' and 'E1' until the end of surgery.

Predicted effect-site concentrations of remifentanil after intranasal placebo at tracheal intubation.

Remifentanil was infused to achieve a TCI plasma concentration of 3.0 ng∙ml-1 using the Minto pharmacokinetic model 24 and then adjusted to maintain the systolic blood pressure (SBP) at 25% of the pre-operative value and the HR at less than 90 bpm. To maintain a neuromuscular blockade, 0.15 mg∙kg-1 increments of rocuronium were infused upon observation of the first twitch in a train-of-four response with the nerve stimulator

Predicted effect-site concentrations of remifentanil after intranasal dexmedetomidine at tracheal intubation.

Remifentanil was infused to achieve a TCI plasma concentration of 3.0 ng∙ml-1 using the Minto pharmacokinetic model 24 and then adjusted to maintain the systolic blood pressure (SBP) at 25% of the pre-operative value and the HR at less than 90 bpm. To maintain a neuromuscular blockade, 0.15 mg∙kg-1 increments of rocuronium were infused upon observation of the first twitch in a train-of-four response with the nerve stimulator

Predicted effect-site concentrations of remifentanil after intranasal placebo before inserting operative laryngoscope.

Remifentanil was infused to achieve a TCI plasma concentration of 3.0 ng∙ml-1 using the Minto pharmacokinetic model 24 and then adjusted to maintain the systolic blood pressure (SBP) at 25% of the pre-operative value and the HR at less than 90 bpm. To maintain a neuromuscular blockade, 0.15 mg∙kg-1 increments of rocuronium were infused upon observation of the first twitch in a train-of-four response with the nerve stimulator

Predicted effect-site concentrations of remifentanil after intranasal dexmedetomidine before inserting operative laryngoscope.

Remifentanil was infused to achieve a TCI plasma concentration of 3.0 ng∙ml-1 using the Minto pharmacokinetic model 24 and then adjusted to maintain the systolic blood pressure (SBP) at 25% of the pre-operative value and the HR at less than 90 bpm. To maintain a neuromuscular blockade, 0.15 mg∙kg-1 increments of rocuronium were infused upon observation of the first twitch in a train-of-four response with the nerve stimulator

Predicted effect-site concentrations of remifentanil after intranasal placebo on removal of operative laryngoscope.

Remifentanil was infused to achieve a TCI plasma concentration of 3.0 ng∙ml-1 using the Minto pharmacokinetic model 24 and then adjusted to maintain the systolic blood pressure (SBP) at 25% of the pre-operative value and the HR at less than 90 bpm. To maintain a neuromuscular blockade, 0.15 mg∙kg-1 increments of rocuronium were infused upon observation of the first twitch in a train-of-four response with the nerve stimulator

Predicted effect-site concentrations of remifentanil after intranasal dexmedetomidine on removal of operative laryngoscope.

Remifentanil was infused to achieve a TCI plasma concentration of 3.0 ng∙ml-1 using the Minto pharmacokinetic model 24 and then adjusted to maintain the systolic blood pressure (SBP) at 25% of the pre-operative value and the HR at less than 90 bpm. To maintain a neuromuscular blockade, 0.15 mg∙kg-1 increments of rocuronium were infused upon observation of the first twitch in a train-of-four response with the nerve stimulator

Predicted effect-site concentrations of remifentanil after intranasal placebo at return of spontaneous breathing.

Remifentanil was infused to achieve a TCI plasma concentration of 3.0 ng∙ml-1 using the Minto pharmacokinetic model 24 and then adjusted to maintain the systolic blood pressure (SBP) at 25% of the pre-operative value and the HR at less than 90 bpm. To maintain a neuromuscular blockade, 0.15 mg∙kg-1 increments of rocuronium were infused upon observation of the first twitch in a train-of-four response with the nerve stimulator

Predicted effect-site concentrations of remifentanil after intranasal dexmedetomidine at return of spontaneous breathing.

Remifentanil was infused to achieve a TCI plasma concentration of 3.0 ng∙ml-1 using the Minto pharmacokinetic model 24 and then adjusted to maintain the systolic blood pressure (SBP) at 25% of the pre-operative value and the HR at less than 90 bpm. To maintain a neuromuscular blockade, 0.15 mg∙kg-1 increments of rocuronium were infused upon observation of the first twitch in a train-of-four response with the nerve stimulator

Predicted effect-site concentrations of remifentanil after intranasal placebo at emergence.

Remifentanil was infused to achieve a TCI plasma concentration of 3.0 ng∙ml-1 using the Minto pharmacokinetic model 24 and then adjusted to maintain the systolic blood pressure (SBP) at 25% of the pre-operative value and the HR at less than 90 bpm. To maintain a neuromuscular blockade, 0.15 mg∙kg-1 increments of rocuronium were infused upon observation of the first twitch in a train-of-four response with the nerve stimulator

Predicted effect-site concentrations of remifentanil after intranasal dexmedetomidine at emergence.

Remifentanil was infused to achieve a TCI plasma concentration of 3.0 ng∙ml-1 using the Minto pharmacokinetic model 24 and then adjusted to maintain the systolic blood pressure (SBP) at 25% of the pre-operative value and the HR at less than 90 bpm. To maintain a neuromuscular blockade, 0.15 mg∙kg-1 increments of rocuronium were infused upon observation of the first twitch in a train-of-four response with the nerve stimulator

Predicted effect-site concentrations of remifentanil after intranasal placebo at extubation.

Remifentanil was infused to achieve a TCI plasma concentration of 3.0 ng∙ml-1 using the Minto pharmacokinetic model 24 and then adjusted to maintain the systolic blood pressure (SBP) at 25% of the pre-operative value and the HR at less than 90 bpm. To maintain a neuromuscular blockade, 0.15 mg∙kg-1 increments of rocuronium were infused upon observation of the first twitch in a train-of-four response with the nerve stimulator

Predicted effect-site concentrations of remifentanil after intranasal dexmedetomidine at extubation.

Remifentanil was infused to achieve a TCI plasma concentration of 3.0 ng∙ml-1 using the Minto pharmacokinetic model 24 and then adjusted to maintain the systolic blood pressure (SBP) at 25% of the pre-operative value and the HR at less than 90 bpm. To maintain a neuromuscular blockade, 0.15 mg∙kg-1 increments of rocuronium were infused upon observation of the first twitch in a train-of-four response with the nerve stimulator

HR in the placebo group Before Intranasal Drugs HR was monitored by fiber-optic pulse oximetry during patient transfer from the ward to the operating room

HR in the dexmedetomidine group Before Intranasal Drugs . HR was monitored by fiber-optic pulse oximetry during patient transfer from the ward to the operating room

HR in the placebo group at pre-induction. HR was monitored by fiber-optic pulse oximetry during patient transfer from the ward to the operating room

HR in the dexmedetomidine group at pre-induction. HR was monitored by fiber-optic pulse oximetry during patient transfer from the ward to the operating room

Patients with postoperative analgesia in two groups. analgesic requests within 2 h after extubation were recorded. An investigator who was blinded from the grouping asked the patients to mark their pain level on a 0-100 visual analogue scale (VAS). A VAS higher than 50 was considered a worse outcome and need to be treated with intravenous 40 mg of parecoxib.

Patients With postoperative nausea in Two Groups. Nausea or vomiting was treated with 4 mg of intravenous ondansetron.

Patients With postoperative vomiting in Two Groups. Nausea or vomiting was treated with 4 mg of intravenous ondansetron.

Patients With postoperative shivering in Two Groups. the occurrence of postoperative shivering

Patients With intra-operative awareness in Two Groups. patients receiving intranasal placebo or dexmedetomidine

An investigator who was blinded from the grouping asked the patients to mark their pain level on a 0-100 visual analogue scale (VAS). A VAS higher than 50 was considered a worse outcome and need to be treated with intravenous 40 mg of parecoxib.

An investigator who was blinded from the grouping asked the patients to mark their pain level on a 0-100 visual analogue scale (VAS). A VAS higher than 50 was considered a worse outcome and need to be treated with intravenous 40 mg of parecoxib.

Total of all reporting groups

Modified Observer's Assessment of Alertness/Sedation scale (OAA/S) scores and 4 point anxiety score of patients receiving intranasal placebo or dexmedetomidine.

Modified Observer's Assessment of Alertness/Sedation Scale:

6 Appears alert and awake, responds readily to name spoken in normal tone 5 Appears asleep but responds readily to name spoken in normal tone 4 Lethargic response to name spoken in normal tone 3 Responds only after name is called loudly or repeatedly 2 Responds only after mild prodding or shaking

1 Does not respond to mild prodding or shaking 0 Does not respond to noxious stimulus.

Heart rate (HR) of patients receiving intranasal placebo or dexmedetomidine. HR was monitored in the study.

Baseline characteristic data of patients receiving intranasal placebo The weights of 41 adult patients receiving intranasal placebo

Baseline characteristic data of patients receiving intranasal dexmedetomidine The weights of 40 adult patients receiving intranasal dexmedetomidine

Baseline characteristic data of patients receiving intranasal placebo The heights of 41 adult patients receiving intranasal placebo

Baseline characteristic data of patients receiving intranasal dexmedetomidine The heights of 40 adult patients receiving intranasal placebo

Baseline characteristics (sex)of patients receiving intranasal placebo or dexmedetomidine The sex of 81 adult patients receiving intranasal placebo or dexmedetomidine

American Society of Anesthesiologists (ASA) status of patients receiving intranasal placebo or dexmedetomidine.

ASA I: No organic, physiologic, biochemical or psychiatric disturbance ASA II: A patient with mild systemic disease that results in no functional limitation.

ASA III: A patient with severe systemic disease that results in functional impairment.

ASA IV: Severe systemic disease that is a constant threat to life. ASA V: Moribund condition in a patient who is not expected to survive with or without the operation.

ASA VI: Declared brain death patient whose organs are being harvested for transplantation.

Duration from intranasal drug administration to arrival at operating room of patients receiving intranasal placebo surgical data of patients receiving intranasal placebo

Duration From Intranasal Drug Administration to Arrival at Operating Room of Patients Receiving Intranasal dexmedetomidine surgical data of patients receiving intranasal dexmedetomidine

Duration from intranasal drug administration to anesthesia intubation of Patients Receiving Intranasal Placebo surgical data of patients receiving intranasal placebo

Duration of minutes From Intranasal Drug Administration to Anesthesia Intubation of Patients Receiving Intranasal dexmedetomidine surgical data of Patients Receiving Intranasal dexmedetomidine.

Duration of anesthesia of patients receiving intranasal placebo Duration from anesthesia intubation to anesthesia ending

Duration of anesthesia of patients receiving intranasal dexmedetomidine Duration from anesthesia intubation to anesthesia ending

Duration of surgery of patients receiving intranasal placebo Duration from surgery beginning to anesthesia ending

Duration of surgery of patients receiving intranasal dexmedetomidine. Duration from surgery beginning to anesthesia ending

Modified OAA/S score of patients receiving intranasal placebo Before intranasal drugs Modified Observer's Assessment of Alertness/Sedation Scale (Modified OAA/S score) 6 Appears alert and awake, responds readily to name spoken in normal tone 5 Appears asleep but responds readily to name spoken in normal tone 4 Lethargic response to name spoken in normal tone 3 Responds only after name is called loudly or repeatedly 2 Responds only after mild prodding or shaking

1 Does not respond to mild prodding or shaking 0 Does not respond to noxious stimulus

Modified OAA/S score of patients receiving intranasal dexmedetomidine Before intranasal drugs Modified Observer's Assessment of Alertness/Sedation Scale (Modified OAA/S score) 6 Appears alert and awake, responds readily to name spoken in normal tone 5 Appears asleep but responds readily to name spoken in normal tone 4 Lethargic response to name spoken in normal tone 3 Responds only after name is called loudly or repeatedly 2 Responds only after mild prodding or shaking

1 Does not respond to mild prodding or shaking 0 Does not respond to noxious stimulus

Modified OAA/S score of patients receiving intranasal placebo at Pre-induction.

Modified Observer's Assessment of Alertness/Sedation Scale (Modified OAA/S score):

6 Appears alert and awake, responds readily to name spoken in normal tone 5 Appears asleep but responds readily to name spoken in normal tone 4 Lethargic response to name spoken in normal tone 3 Responds only after name is called loudly or repeatedly 2 Responds only after mild prodding or shaking

1 Does not respond to mild prodding or shaking 0 Does not respond to noxious stimulus

Modified OAA/S score of patients receiving intranasal dexmedetomidine at Pre-induction.

Modified Observer's Assessment of Alertness/Sedation Scale (Modified OAA/S score):

6 Appears alert and awake, responds readily to name spoken in normal tone 5 Appears asleep but responds readily to name spoken in normal tone 4 Lethargic response to name spoken in normal tone 3 Responds only after name is called loudly or repeatedly 2 Responds only after mild prodding or shaking

1 Does not respond to mild prodding or shaking 0 Does not respond to noxious stimulus

Modified OAA/S score of patients receiving intranasal placebo After extubation. Modified Observer's Assessment of Alertness/Sedation Scale (Modified OAA/S score) 6 Appears alert and awake, responds readily to name spoken in normal tone 5 Appears asleep but responds readily to name spoken in normal tone 4 Lethargic response to name spoken in normal tone 3 Responds only after name is called loudly or repeatedly 2 Responds only after mild prodding or shaking

1 Does not respond to mild prodding or shaking 0 Does not respond to noxious stimulus

Modified OAA/S score of patients receiving intranasal dexmedetomidine after extubation.

Modified Observer's Assessment of Alertness/Sedation Scale (Modified OAA/S score):

6 Appears alert and awake, responds readily to name spoken in normal tone 5 Appears asleep but responds readily to name spoken in normal tone 4 Lethargic response to name spoken in normal tone 3 Responds only after name is called loudly or repeatedly 2 Responds only after mild prodding or shaking

1 Does not respond to mild prodding or shaking 0 Does not respond to noxious stimulus

Anxiety score of Patients Receiving Intranasal Placebo Before Intranasal Drugs. The patients were taught to rate their anxiety levels using a 4-point anxiety score (1 = combative, 2 =anxious, 3 = calm, and 4 = amiable)

Anxiety score of Patients Receiving Intranasal dexmedetomidine Before Intranasal Drugs.

The patients were taught to rate their anxiety levels using a 4-point anxiety score (1 = combative, 2 =anxious, 3 = calm, and 4 = amiable)

Anxiety score of Patients Receiving Intranasal Placebo at Pre-induction. The patients were taught to rate their anxiety levels using a 4-point anxiety score (1 = combative, 2 =anxious, 3 = calm, and 4 = amiable)

Anxiety score of Patients Receiving Intranasal dexmedetomidine at Pre-induction.

The patients were taught to rate their anxiety levels using a 4-point anxiety score (1 = combative, 2 =anxious, 3 = calm, and 4 = amiable)

Satisfaction scores of patients receiving intranasal placebo. satisfaction was assessed using a 3-point satisfaction score(1 = highly satisfactory, 2 = acceptable, and 3 = unacceptable).

Satisfaction scores of patients receiving intranasal dexmedetomidine. Satisfaction used a 3-point satisfaction score(1 = highly satisfactory, 2 = acceptable, and 3 = unacceptable).

satisfaction using a 3-point satisfaction score (1 = highly satisfactory, 2 = acceptable, and 3 = unacceptable) anxiety levels using a 4-point anxiety score (1 = combative, 2 = anxious, 3 = calm, and 4 = amiable) were collected before intranasal drugs and at pre-induction.

Anxiety score >2 was considered to be better for the patient.

Time to spontaneous breathing of patients receiving intranasal placebo. The time elapsed between stopping anesthetic infusions and adequate ventilation

Time to spontaneous breathing of patients receiving intranasal dexmedetomidine. The time elapsed between stopping anesthetic infusions and adequate ventilation

Time to consciousness of patients receiving intranasal placebo. The time elapsed between stopping anesthetic infusions and consciousness.

Time to consciousness of patients receiving intranasal dexmedetomidine. The time elapsed between stopping anesthetic infusions and consciousness.

Time to extubation of patients receiving intranasal placebo. The time elapsed between stopping anesthetic infusions and extubation

Time to extubation of patients receiving intranasal dexmedetomidine. The time elapsed between stopping anesthetic infusions and extubation

Predicted effect-site concentrations of propofol after intranasal placebo at tracheal intubation.

Propofol was infused intraoperatively to a target-controlled infusion (TCI) plasma concentration of 2.5μg∙ml-1 using DiprifusorTM software. The infusion rate was adjusted via plasma concentration increments of 0.5 μg∙ml-1 at 2-min intervals to maintain the Narcotrend index between 'D0' and 'E1' until the end of surgery.

Predicted effect-site concentrations of propofol after intranasal dexmedetomidine at tracheal intubation.

Propofol was infused intraoperatively to a TCI plasma concentration of 2.5μg∙ml-1 using DiprifusorTM software. The infusion rate was adjusted via plasma concentration increments of 0.5 μg∙ml-1 at 2-min intervals to maintain the Narcotrend index between 'D0' and 'E1' until the end of surgery.

Predicted effect-site concentrations of propofol after intranasal placebo before inserting operative laryngoscope.

Propofol was infused intraoperatively to a TCI plasma concentration of 2.5μg∙ml-1 using DiprifusorTM software. The infusion rate was adjusted via plasma concentration increments of 0.5 μg∙ml-1 at 2-min intervals to maintain the Narcotrend index between 'D0' and 'E1' until the end of surgery.