A Case of Trigger-Point Injection-Induced Hypokalemic Paralysis
نویسندگان
چکیده
BACKGROUND Trigger-point injection (TPI) therapy is an effective modality for symptomatic treatment of myofascial pain. Serious adverse effects are rarely observed. In this report, we present the case of a 39-year-old man who experienced severe, transient hypokalemic paralysis in the context of TPI therapy with methylprednisolone, bupivacaine, and epinephrine. He was successfully treated with electrolyte replacement in a closely monitored setting. CASE REPORT A 39-year-old man with no past medical history except for chronic left hip pain from a work-related injury received a TPI with methylprednisolone and bupivacaine. The TPI targeted the left iliopsoas tendon and was administered using ultrasound guidance. There were no immediately perceived complications, but within 12 h he presented with severe hypokalemic paralysis with a serum potassium 1.7 mmol/L. Judicious potassium repletion was initiated. Repeated tests after 6 h consistently showed normal potassium levels of 4.5 mmol/L. CONCLUSIONS Severe hypokalemic paralysis in the context of trigger-point injection is an incredibly rare occurrence and this is the first case report in English literature. A high index of clinical suspicion and a systematic approach are therefore required for prompt diagnosis and management of this obscure iatrogenic entity. Clinicians can enhance patient safety by allowing the primary pathology to guide them.
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