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Susan M Lord: Influence Statistics

STUDY DESIGN: The authors developed a diagnostic double-blindfolded survey using placebo-controlled local anesthetic blocks.

OBJECTIVE: To determine the prevalence of cervical zygapophysial joint pain among patients with chronic neck pain (more than 3 months' duration) after whiplash injury.

SUMMARY OF BACKGROUND DATA: The prevalence of cervical zygapophysial joint pain after whiplash has been studied by means of comparative local anesthetic blocks. The concern is that such blocks may be ...

STUDY DESIGN: A survey of the prevalence of cervical zygapophysial joint pain was conducted.

OBJECTIVES: To determine the prevalence of cervical zygapophysial joint pain in patients with chronic neck pain after whiplash.

SUMMARY OF BACKGROUND DATA: In a significant proportion of patients with whiplash, chronic, refractory neck pain develops. Provisional data suggest many of these patients have zygapophysial joint pain, but the diagnosis has been established by single, uncontrolled ...

BACKGROUND: The development of target-specific local anesthetic blocks has enabled pain physicians to explore the anatomical source of chronic spinal pain. However, such blocks rely on subjective responses and may be subject to the placebo effect. Comparative local anesthetic blocks have been advocated as a means of identifying true-positive cases and excluding placebo responders. This paradigm employs two local anesthetics with different durations of action; only patients who obtain ...

BACKGROUND: Chronic pain in the cervical zygapohyseal joints is a common problem after whiplash injury, but treatment is difficult. Percutaneous radiofrequency neurotomy can relieve the pain by denaturing the nerves innervating the painful joint, but the efficacy of this treatment has not been established.

METHODS: In a randomized, double-blind trial, we compared percutaneous radio-frequency neurotomy in which multiple lesions were made and the temperature of the electrode making the ...

BACKGROUND: Chronic pain in the cervical zygapophyseal joints is a common problem after a whiplash injury. Treatment with intraarticular injections of corticosteroid preparations has been advocated, but the value of this approach has not been established. We compared the efficacy of a depot injection of a corticosteroid preparation with the efficacy of an injection of a local anesthetic agent in patients with painful cervical zygapophyseal joints.

METHODS: Sixteen men and 25 women with ...

OBJECTIVE: To determine the long-term efficacy of percutaneous radiofrequency medial branch neurotomy in the treatment of chronic neck pain.

METHODS: Between 1991 and 1996, radiofrequency neurotomy was performed in 28 patients diagnosed as having cervical zygapophysial joint pain on the basis of controlled diagnostic blocks. The procedure was repeated in patients whose pain recurred. Outcome measures were the proportion of patients who responded to the initial procedure and the duration ...

The utility of randomised, double-blind, controlled, comparative local anaesthetic blocks for the diagnosis of cervical, zygapophysial joint pain was studied in 47 patients with chronic neck pain following whiplash injury. Each patient was investigated with radiologically controlled blocks of the medial branches of the cervical, dorsal rami to anaesthetise the target cervical, zygapophysial joint. The blocks were performed using either lignocaine or bupivacaine, randomly allocated, and ...

A consecutive series of 100 patients was studied to determine the prevalence of third occipital nerve headache in patients with chronic neck pain (> three months in duration) after whiplash. Seventy one patients complained of headache associated with their neck pain. Headache was the dominant complaint of 40 patients, but was only a secondary problem for the other 31. Each patient with headache underwent double blind, controlled diagnostic blocks of the third occipital nerve. On two ...

OBJECTIVE: To determine the false-positive rate of anesthetic blocks of the medial branches of the cervical dorsal rami in the diagnosis of cervical zygapophysial joint pain.

DESIGN: Comparison between single diagnostic blocks, and a criterion standard of double-blind, controlled, differential anesthetic blocks.

SETTING: Tertiary referral center.

PATIENTS: The first 55 consecutive patients with neck pain for > 3 months after and attributable to a motor vehicle accident, and who had ...

It is well recognised that patients with chronic pain, in particular, chronic whiplash-associated neck pain, exhibit psychological distress. However, debate continues as to whether the psychological distress precedes and causes the chronic pain or, conversely, the psychological distress is a consequence of chronic pain. Using cervical zygapophysial joint pain as a model for chronic pain, the effect of a definitive neurosurgical treatment on the associated psychological distress was ...

STUDY DESIGN: A survey of pain intensity and psychological symptoms in patients with chronic neck pain after whiplash injury.

OBJECTIVES: To describe the pain and psychological profiles of patients with chronic whiplash.

SUMMARY OF BACKGROUND DATA: Reports in the literature mention a constellation of symptoms associated with chronic whiplash injury but no systematic survey using objective patient report measures has been reported.

METHODS: One hundred forty consecutive referred patients ...

Percutaneous radiofrequency neurotomy has been used in the treatment of pain from the cervical zygapophysial joints, but the results have been modest and not compelling. Several factors might account for its apparent poor success rate, including inadequate patient selection, inaccurate surgical anatomy, and technical errors. In an effort to overcome these confounders, we used comparative local anesthetic blocks to preoperatively, definitively diagnose cervical zygapophysial joint pain ...

Headache often compounds chronic neck pain following whiplash injury. To better understand post-traumatic headache, the SCL-90-R symptom checklist was used to determine the psychological profiles of patients with whiplash-associated headache and of patients with whiplash-associated neck pain without headache. The psychological profiles of these patients were compared with previously published SCL-90-R profiles of patients with post-traumatic and nontraumatic headache, and of the normal ...