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Case report
Smartphone aiding in analysis of Hamman’s sign
  1. Priyanka Thakeria,
  2. Nita Danda,
  3. Anudeep Gupta and
  4. Dharmesh Anand
  1. Cardiology Department, Townsville Hospital and Health Service, Townsville, Queensland, Australia
  1. Correspondence to Dr Nita Danda; Nita.danda{at}


Hamman’s sign refers to an unusual click that occurs in synchrony with heart sounds, and is pathognomonic for left-sided pneumothorax and spontaneous mediastinum. In this case, a 17-year-old man living in a rural area used his smartphone to record an audible clicking sound emanating from his thorax. This occurred following coughing episodes secondary to an upper respiratory tract infection. Initially, this prompted a request for an echocardiogram to exclude structural cardiac anomalies; however, Hamman’s sign was also considered. This facilitated the timely diagnosis of pneumothorax to be made via a simple chest radiograph, one of the only imaging modalities available at the patient’s rural health service. To promote awareness of this rare clinical phenomenon, this report also presents the patient’s own sound recording of Hamman’s sign and corresponding chest radiographs.

  • pneumothorax
  • pneumomediastinum
  • emergency medicine

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  • Contributors The above authors have contributed to the case report as follows: PT (Cardiology Resident): major contribution in writing, formatting and editing the case report manuscript. ND (Cardiology Registrar): liaised with the patient and assisted in obtaining patient consensus and clinical story; involved in editing and formatting the manuscript, and reviewing investigations. AG (Cardiology Advanced Trainee): involved in initial patient care, diagnosis of pneumothorax and patient follow-up; involved in editing the manuscript. DA (Cardiology Consultant): involved in patient follow-up; supervised the process of writing the manuscript; involved in editing the manuscript.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests None declared.

  • Patient consent for publication Obtained.

  • Provenance and peer review Not commissioned; externally peer reviewed.

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