Known allergy or hypersensitivity reaction to dexmedetomidine
Organ dysfunction (renal/hepatic failure or leukemia)
Cardiac disease (congenital or acquired)
Airway or thoracic malformation
Cerebral palsy
Hypotonia
Need for premedication
Current/recent upper respiratory infection (within four weeks prior to the surgery)
Asthma
Allergy or intolerance to clonidine
Non-English speaking parents/patients.

NCT02162433_exc_T1
Condition
allergy
NCT02162433_exc_T2
Condition
hypersensitivity
NCT02162433_exc_T3
Drug
dexmedetomidine
NCT02162433_exc_T4
Scope
allergy or hypersensitivity
NCT02162433_exc_T5
Condition
Organ dysfunction
NCT02162433_exc_T6
Condition
hepatic failure
NCT02162433_exc_T7
Condition
leukemia
NCT02162433_exc_T8
Condition
enal/ ailure
NCT02162433_exc_T9
Scope
renal/hepatic failure or leukemia
NCT02162433_exc_T10
Condition
Cardiac disease
NCT02162433_exc_T11
Qualifier
congenital
NCT02162433_exc_T12
Qualifier
acquired
NCT02162433_exc_T13
Scope
congenital or acquired
NCT02162433_exc_T14
Condition
thoracic malformation
NCT02162433_exc_T15
Condition
way or formation
Ce
NCT02162433_exc_T16
Condition
Cerebral palsy
NCT02162433_exc_T17
Condition
Hypotonia
NCT02162433_exc_T18
Drug
premedication
NCT02162433_exc_T19
Mood
Need for
NCT02162433_exc_T20
Temporal
Current
NCT02162433_exc_T21
Temporal
recent
NCT02162433_exc_T22
Condition
upper respiratory infection
NCT02162433_exc_T23
Temporal
within four weeks prior to the surgery
NCT02162433_exc_T24
Reference_point
the surgery
NCT02162433_exc_T25
Procedure
surgery
NCT02162433_exc_T26
Scope
Current/recent
NCT02162433_exc_T27
Condition
Asthma
NCT02162433_exc_T28
Condition
Allergy
NCT02162433_exc_T29
Condition
intolerance
NCT02162433_exc_T30
Drug
clonidine
NCT02162433_exc_T31
Observation
Non-English speaking parents
NCT02162433_exc_T32
Observation
h speaking parents/p