Pain physician
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Radiofrequency (RF) treatment is a minimally invasive procedure that has been used for more than 3 decades in treating various chronic pain syndromes. Conventional (continuous) RF treatment occasionally results in worsening or even initiating a new type of pain. The use of pulsed radiofrequency (PRF), which has a non- or minimally neurodestructive neuromodulatory effect, serves as an alternative to conventional RF therapy in many medical situations. ⋯ PRF to the medial calcaneal nerve is a safe and effective method for treatment of chronic plantar fasciitis pain. The onset of effective analgesia can be achieved more rapidly with PRF compared to TRF on the same nerve. Further randomized trials are needed to confirm the therapeutic effect and optimizing the dose of RF needed.Key words: Pulsed radiofrequency, thermal radiofrequency, medial calcaneal nerve, plantar fasciitis, plantar aponeurosis, visual analogue scale.
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Entrapment neuropathies of the fibular nerve and its branches are often underdiagnosed due to the lack of reliable diagnosis using clinical examination and electrophysiologic evaluation. Most fibular nerve compressions may be classified into 2 broad categories: (a) mechanical causes, which occur at fibrous or fibro-osseous tunnels, and (b) dynamic causes related to nerve injury during specific limb positioning. Foot drop resulting from weakness of the dorsiflexor muscles of the foot is a relatively uncommon presentation and closely related to L5 neuropathy caused by a disc herniation. ⋯ Knowledge of normal MRI anatomy of the nerves in the knee and leg is essential for the precise assessment of the presence of peripheral entrapment conditions that may produce painless or painful drop foot. In conclusion, we stress the importance of preoperative anatomic mapping of entrapment neuropathies to minimize neurological complications. Key words: Foot drop, fibular nerve, ganglion cyst, proximal tibiofibular jointFoot drop, fibular nerve, ganglion cyst, proximal tibiofibular joint.
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Observational Study
A New Radiofrequency Ablation Procedure to Treat Sacroiliac Joint Pain.
Low back pain may arise from disorders of the sacroiliac joint in up to 30% of patients. Radiofrequency ablation (RFA) of the nerves innervating the sacroiliac joint has been shown to be a safe and efficacious strategy. ⋯ Compared to the cooled radiofrequency ablation (c-RFA) technique, the new b-RFA technique reduced operating time by more than 50%, decreased x-ray exposure by more than 80%, and cut the cost by more than $1000 per case. The new method was associated with significantly improved clinical outcomes despite the limitations of the study design. Thus this new technique appeared to be safe, efficacious, and cost-effective. Key words: Sacroiliac joint pain, sacroiliac joint, low back pain, radiofrequency ablation (RFA), bipolar radiofrequency ablation (b-RFA), cooled radiofrequency ablation (c-RFA), cost-effectiveness.
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Randomized Controlled Trial
Analgesic Effect of Nalbuphine When Added to Intravenous Regional Anesthesia: A Randomized Control Trial.
Different adjuvant drugs are currently added to lidocaine for intravenous regional anesthesia (IVRA) to decrease tourniquet and postoperative pain. ⋯ Nalbuphine decreases early tourniquet and postoperative pain after IVRA and delays the need for analgesic rescue. In addition, nalbuphine accelerates the onset and prolongs the recovery time for both sensory and motor blocks with no significant adverse events. However, it has no effect on postoperative cortisol levels.Key words: Intravenous, regional anesthesia, lidocaine, nalbuphine, pain, postoperative.
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Review Case Reports
What's Tramadol Got to Do with It? A Case Report of Rebound Hypoglycemia, a Reappraisal and Review of Potential Mechanisms.
Tramadol has gained traction as an analgesic of choice among pain practicing physicians. However some concerns regarding a previously unlabeled adverse reaction - hypoglycemia - have cast it in a dim light. Prior reports have noted an associated risk of hospitalization for hypoglycemia after tramadol use, but whether tramadol is the main causal agent is poorly understood and the underlying mechanisms are not well delineated. We present a unique case of rebound hypoglycemia as a variation of the theme of tramadol's adverse effect profile in a patient with type 1 diabetes mellitus, and reappraise potential mechanisms underlying this underappreciated phenomenon. ⋯ The clinical scenario described is a case of rebound hypoglycemia after tramadol use in a patient with type-1 diabetes naïve to opioid analgesics. The episodes of hypoglycemia aligned perfectly with the anticipated pharmacodynamic and pharmacokinetic properties of tramadol. The specificity and temporality of events after tramadol use in this patient fulfilled causality criteria. Tramadol may cause rebound hypoglycemia in patients via interference of the intrinsic euglycemia-restoration pathways and a blunted autonomic counter-regulatory response to antecedent hypoglycemia. Its use must be tempered by this underappreciated adverse effect profile.Key words: Tramadol, hypoglycemia, sacroiliac joint arthritis, type 1 diabetes mellitus, serotonin uptake inhibitors, glutamate receptor 4.