no participant recruited

To determine the efficacy of lidocaine injection of trigger points versus subcutaneous injection in patients with subacute whiplash associated disorder following injury.

This is a double-blind, randomized controlled trial to determine the efficacy of lidocaine injection of trigger points versus subcutaneous injection in patients with subacute whiplash associated disorder following injury. Outcomes include pain, objective assessment, self-report function recovery, impact on work performance and globe perceived effects which will be assessed 5 minutes, 2 and 6 weeks following injection.

Inclusion Criteria:

• fulfill the Grade II Quebec Task Force classification of WAD,
• with identifiable myofascial trigger points ( which occur with or without a taut band),
• reproduction of recognizable pain with sustained pressure ( up to 10 seconds) on trigger points
• aged 18 to 70
• a good understanding of informed consent and willing to attend this trial.

Exclusion Criteria:

• have serious injury such as fracture and internal bleeding
• suspicion of upper cervical instability or neurological deficits
• clinical evidence of radiculopathy
• a history of active cancer, central nerve disorder, blood clotting disorders, needle phobia
• anticoagulant medication user
• previous experience with any type of needling for myofascial pain