Pain medicine : the official journal of the American Academy of Pain Medicine
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Intradiscal biacuplasty (IDB) is a novel bipolar cooled radiofrequency system for the treatment of degenerative disk disease. We present the results of a pilot trial with 6-month follow-up. DESIGN, SETTING, PATIENTS, AND INTERVENTIONS: Fifteen patients, 22-55 years old, underwent one- or two-level IDB treatment of their painful lumbar discs. All had chronic low back pain >6 months, back pain exceeding leg pain, concordant pain on provocative discography, disc height >50% of control, and evidence of single- or two-level degenerative disc disease without evidence of additional changes on magnetic resonance imaging. IDB was performed under fluoroscopy using two radiofrequency probes positioned bilaterally in the intervertebral disc. Thirteen patients completed follow-up questionnaires at 1, 3, and 6 months. Pain disability was evaluated with Oswestry and Short Form (SF)-36 questionnaires. ⋯ Patients showed improvements in several pain assessment measures after undergoing IDB for discogenic pain. A randomized controlled study is warranted and needed to address the efficacy of the procedure.
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Case Reports
Adriamycin injection into the medial cord of the brachial plexus: computed tomography-guided targeted pain therapy.
Recent advances in radiographic imaging technology allow for therapeutic agents to be placed within the subepineurium of peripheral nerve tissue. Adriamycin, a chemotherapeutic agent, is retrogradely transported by nerves to their cell bodies residing in the dorsal root ganglia. The combined process of radiological approach, an understanding of the anatomy of the brachial nerve plexus, and the use of agents that are retrogradely transported by nerves allows for targeted neuroablation of nerves. ⋯ Here, we report on the transcutaneous computed tomography (CT)-guided injection of adriamycin into specific branches of the brachial plexus in a patient with metastatic cervical cancer involving the lower plexus whose pain was untreatable by aggressive medical therapy that included epidural trials of opioids. Identification of the medial brachial cord was achieved using CT-guided techniques that included accurate localization with intra-neural dye injection, followed by injection of 0.5 mg of adriamycin. The patient reported complete pain relief within 12 h of the injection.
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Randomized Controlled Trial Comparative Study
Analgesic efficacy and safety of morphine-chitosan nasal solution in patients with moderate to severe pain following orthopedic surgery.
Parenteral opioids are the standard of care for treating moderate to severe postsurgical pain. This randomized, double-blind, dose-ranging study compared the safety and efficacy of intranasal (IN) morphine with intravenous (IV) morphine and placebo. ⋯ By multiple measures of pain intensity and pain relief, IN morphine provides sustained analgesia in postsurgical patients and thus may offer a safe and less invasive alternative to IV morphine.
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To determine hip joint pain referral patterns. ⋯ Buttock pain is the most common pain referral area from a symptomatic hip joint. Traditionally accepted groin and thigh referral areas were less common. Hip joint pain can occasionally refer distally to the foot. Lower lumbar spine referral did not occur.
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Clinical Trial
A pilot open-label study of the efficacy of subanesthetic isomeric S(+)-ketamine in refractory CRPS patients.
Complex regional pain syndrome (CRPS) is a severe neuropathic pain state that is often disproportionate to the initial trauma. Associated features are autonomic dysregulation, swelling, motor dysfunction, and trophic changes to varying degrees. Despite a multitude of treatment modalities, a subgroup of CRPS patients remain refractory to all standard therapies. In these patients, the disease may spread extraterritorially, which results in severe disability. A critical involvement of N-methyl-D-aspartate receptors (NMDARs) has been demonstrated both clinically and by animal experimentation. NMDA antagonists may be effective in many neuropathic pain states. In long-standing, generalized CRPS, we investigated the effects of S(+)-ketamine on pain relief and somatosensory features, assessed by quantitative sensory testing (QST). ⋯ S(+)-ketamine can be gradually titrated to large doses (500 mg/day) without clinically relevant side effects. There was no pain relief or change in QST measurements in this series of long-standing severe CRPS patients.