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Background: In the clinic, death from nontraumatic pulmonary fat embolism associated with minor soft tissue contusion, surgery, cancer chemotherapy, hematologic disorders and so on has been reported. Patients often present with atypical manifestations and rapid deterioration, making diagnosis and treatment difficult. However, there are no reported cases of death from pulmonary fat embolism after acupuncture therapy. This case aims to emphasize that awareness of nontraumatic pulmonary fat embolism as a complication of acupuncture therapy needs to be improved. In addition, it suggests that in such cases, autopsy should be used to identify the source of fat emboli. Case presentation: The patient, a 72-year-old woman, experienced symptoms of dizziness and fatigue after silver-needle acupuncture therapy. She experienced a significant drop in blood pressure and died 2 hours later despite treatment and resuscitation. A systematic autopsy and histopathology examination (H&E and Sudan Ⅲ staining) were performed. More than 30 pinholes were observed on the surface of the lower back. Focal hemorrhages were seen surrounding the pinholes in the subcutaneous fatty tissue. Microscopically, numerous fat emboli were observed in the interstitial pulmonary artery and a large number of alveolar wall capillaries, in addition to the vessels of the heart, liver, spleen and thyroid gland. The lungs showed congestion and edema. However, the cause of death was identified as pulmonary fat embolism. Conclusion: This article suggests that high vigilance for risk factors and the complication of pulmonary fat embolism following silver-needle acupuncture therapy should be exercised. In postmortem examinations, examining the peripheral arterial system and the venous system draining from noninjured sites for the formation of fat emboli is helpful to differentiate posttraumatic and nontraumatic pulmonary fat embolism. |
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