Pain physician
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Amputees commonly feel an intermittent tingling, piercing, or burning sensation in the region of the missing portion of the amputated limb, a phenomenon known as phantom limb pain. Current treatment modalities include medications, mirror therapy, transcutaneous electrical nerve stimulation, and more recently neuromodulation through spinal cord stimulation and dorsal root ganglion (DRG) stimulation. ⋯ The cumulative evidence at present suggests DRG stimulation may be a potentially effective treatment for phantom limb pain, however, a powered prospective randomized controlled trial is needed to assess the long-term benefits of this treatment modality. Given the increasing population of military veterans who are living with limb amputations, finding a modality for adequate long-term pain control is crucial.
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Randomized Controlled Trial
Immunosuppressive Effect of Intrathecal Morphine, Dexmedetomidine, or Both in Combination with Bupivacaine on Patients Undergoing Major Abdominal Cancer Surgery.
An impaired immune system in the perioperative period has important clinical implications in patients with cancer. Despite the immunosuppressive properties of opioid therapy, it is still commonly utilized in the intrathecal or epidural space for the treatment of postoperative pain. Also, intrathecal dexmedetomidine has extended analgesic efficacy in postoperative pain; it can significantly affect immune function in perioperative patients. ⋯ Intrathecal dexmedetomidine has the least immunosuppressive effect than morphine and morphine-dexmedetomidine, in combination with bupivacaine.
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Randomized Controlled Trial
Radiofrequency Denervation on Lumbar Facet Joint Pain in the Elderly: A Randomized Controlled Prospective Trial.
Lumbar facet joint (LFJ) pain is the most common cause of low back pain in the elderly. Denervation of the medial branch of the spinal dorsal ramus can theoretically achieve long-term pain relief. Yet there is little evidence of high-level prospective randomized controlled research. ⋯ Radiofrequency denervation can effectively reduce LFJ pain and improve movement disorder. The effect is good until 6 months later.
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The diagnosis and treatment of neuropathic pain is often clinically challenging, with many patients requiring treatments beyond oral medications. To improve our percutaneous treatments, we established a clinical pathway that utilized ultrasound (US) guidance for steroid injection and alcohol ablation for patients with painful neuropathy. ⋯ US-guided percutaneous treatments for neuropathic pain present a growing opportunity for interprofessional collaboration between neurosurgery, clinicians who treat chronic pain, and sonologists. US can provide valuable diagnostic information and guide accurate percutaneous treatments in skilled hands. Further studies are warranted to determine whether a US-guided treatment pathway can prevent unnecessary open surgical management.
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Obstructive sleep apnea (OSA) is the most common form of sleep-disordered breathing. While patients on chronic opioids are at increased risk of sleep-disordered breathing, there is a lack of data on the relationship between opioid dose and OSA risk in particular. The STOP-Bang Questionnaire (SBQ) is a common screening tool for OSA, but it has not been well studied in patients on chronic opioid therapy. ⋯ We found no relationship between the opioid dose and the risk of OSA as measured by the SBQ score in this chronic opioid population. Opioids may be more associated with sleep apnea due to central rather than obstructive processes, and additional screening tools beyond the SBQ may be needed to better screen for sleep apnea in this population.