Coagulopathies (with prothrombin concentration less than 60% or INR more than 1.5)
In-ability to postpone anti-coagulation medications.
Infection or injury or a lesion at the block site.
Suspected cervical vertebral column injury necessitating using a neck collar.
A compromised lung on the contralateral side of the block (Pneumothorax, hemothorax or Pneumonectomy).
Traumatic vascular injuries or operative interventions (Surgical harvesting) involving arteries of the upper limb on the operative side.
Patients with communication difficulties.
Hypersensitivity to local anesthetics and/or Dexamethasone.
Patients on perioperative intravenous (IV) steroids.

NCT03043495_exc_T1
Condition
Coagulopathies
NCT03043495_exc_T2
Measurement
prothrombin concentration
NCT03043495_exc_T3
Value
less than 60%
NCT03043495_exc_T4
Value
more than 1.5
NCT03043495_exc_T5
Measurement
INR
NCT03043495_exc_T6
Scope
prothrombin concentration less than 60% or INR more than 1.5
NCT03043495_exc_T7
Drug
anti-coagulation medications
NCT03043495_exc_T8
Mood
In-ability to postpone
NCT03043495_exc_T9
Condition
Infection
NCT03043495_exc_T10
Condition
injury
NCT03043495_exc_T11
Condition
lesion
NCT03043495_exc_T12
Qualifier
at the block site
NCT03043495_exc_T13
Scope
Infection or injury or a lesion
NCT03043495_exc_T14
Condition
cervical vertebral column injury
NCT03043495_exc_T15
Mood
Suspected
NCT03043495_exc_T16
Condition
compromised lung
NCT03043495_exc_T17
Qualifier
contralateral side of the block
NCT03043495_exc_T18
Condition
Pneumothorax
NCT03043495_exc_T19
Condition
hemothorax
NCT03043495_exc_T20
Condition
Pneumonectomy
NCT03043495_exc_T21
Scope
Pneumothorax, hemothorax or Pneumonectomy
NCT03043495_exc_T22
Condition
Traumatic vascular injuries
NCT03043495_exc_T23
Procedure
operative interventions
NCT03043495_exc_T24
Procedure
Surgical harvesting
NCT03043495_exc_T25
Qualifier
arteries of the upper limb on the operative side
NCT03043495_exc_T26
Scope
Traumatic vascular injuries or operative interventions (Surgical harvesting)
NCT03043495_exc_T27
Condition
communication difficulties
NCT03043495_exc_T28
Condition
Hypersensitivity
NCT03043495_exc_T29
Drug
local anesthetics
NCT03043495_exc_T30
Drug
Dexamethasone
NCT03043495_exc_T31
Scope
local anesthetics and/or Dexamethasone
NCT03043495_exc_T32
Temporal
perioperative
NCT03043495_exc_T33
Drug
intravenous (IV) steroids