Pain physician
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Paresthesia-based spinal cord stimulation (SCS) depends upon dorsal column (DC) fiber activation to engage pain-relieving neural mechanisms. However, the mechanisms for 10-kHz paresthesia-free SCS have not been fully elucidated. Preclinical work has shown selective drive of inhibitory dorsal horn neurons, while other hypotheses suggest that DC fibers may be activated. To provide clinical data for guiding mechanism work, we analyzed paresthesia perception thresholds (PPT) over a range of low to high kHz frequency and compared those values to the stimulation parameters from the therapeutic 10-kHz SCS programs used by patients. ⋯ Therapeutic 10-kHz SCS uses stimulation amplitudes far lower than the PPT, providing evidence that therapeutic 10-kHz SCS does not activate dorsal column axons. Additionally, the PPT decreases with increasing kHz frequency, suggesting that a presumed asynchronous pattern of activation from kHz stimulation does not raise the threshold at which sensation occurs.
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Randomized Controlled Trial
Adjuvants to Conventional Management of Postdural Puncture Headache Following Obstetric Surgery Under Spinal Anesthesia: Mirtazapine vs. Sumatriptan.
Postdural puncture headache (PDPH) is a debilitating, life-altering complication of the administration of obstetric spinal anesthesia (SA). The lack of evidence-based treatment for PDPH necessitates the implementation of new treatment modalities. Mirtazapine is a noradrenergic and specific serotonergic antidepressant that has been used as a prophylactic treatment for chronic tension-type headaches. Few previous studies have assessed the efficacy of sumatriptan in the treatment of PDPH. ⋯ Adding either mirtazapine or sumatriptan to the CM of PDPH following obstetric SA was associated with lower means of headache intensities, higher rates of complete response to medical treatment, and decreased incidence of refractory headaches. As an antiemetic drug, mirtazapine was found to be effective, inexpensive, safe, well-tolerated, and capable of being used on an outpatient basis.
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Randomized Controlled Trial
Rhomboid Intercostal versus Serratus Anterior Plane Block for Analgesia After Thoracodorsal Artery Perforator Flap Following Partial Mastectomy: A Randomized Controlled Trial.
The thoracodorsal artery perforator (TDAP) flap has been developed to improve the postoperative aesthetic and psychological states of patients who receive breast-conserving surgery (BCS); nonetheless, the TDAP flap exacerbates the pain that occurs at 2 surgical sites. ⋯ Because of its ability to block both the anterior and posterior hemithorax, the RIB, is more efficient than the SAB at controlling acute pain and reducing opioid consumption in patients undergoing BCS followed by TDAP flaps; thus, the RIB can be employed as a potential alternative in these surgeries.