Case series: acupuncture-related pneumothorax.

Background: Acupuncture has become a more popular complementary and alternative medicine worldwide. As pneumothorax is a rare acupuncture-related adverse event (AE), it is thought to be under-recognized by acupuncturists and emergency physicians, and the public is often not aware of this potential AE resulting in delayed hospital presentation.

Methods: This is a case series of acupuncture-related pneumothoraces diagnosed in an emergency department (ED) in Singapore. Data was collected retrospectively from patients' notes and prospectively from the patients over the phone.

Case Presentations: Between 2017 and 2021, 4 out of 474 (0.84%) pneumothoraces were acupuncture related. Three of these patients consented to participate in this study. One patient developed bilateral pneumothoraces. All 3 patients claimed that they were not informed by the acupuncturists of potential serious AEs prior to acupuncture treatments and that they were not aware that such AE could occur. All 3 patients had reported their symptoms of chest pain and/or breathlessness to their acupuncturists post-treatment, but they were not advised to seek urgent medical attention. When the 3 patients had informed their acupuncturists about their diagnosis of pneumothorax, 2 of the acupuncturists did not seem to be aware of this acupuncture-related AE.

Discussion: When pneumothorax manifests, there is a potential need for an invasive procedure and continuous monitoring as it may devolve into a life-threatening condition with cardiovascular compromise. Early medical recognition and attention are needed to ensure optimal patient outcomes. In the appropriate population cohort, a history of prior acupuncture treatments should be included as part of history-taking assessment in patients presenting with chest pain and/or breathlessness.

Conclusion: Emergency physicians should be vigilant of this potentially serious and life-threatening complication for anyone presenting with chest discomfort and/or breathlessness after recently undergoing acupuncture to ensure earlier diagnosis, management, and better patient outcome.