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Mobile diagnosis: Hamman's crunch in a primary spontaneous pneumothorax
  1. Thiagarajan Jaiganesh,
  2. Kate Wright,
  3. Arvinder Sadana
  1. Emergency Department, St George's Hospital, London, UK
  1. Correspondence to Thiagarajan Jaiganesh, Emergency Department, St George's Hospital, Blackshaw Road, Tooting, London SW17 0QT, UK; Jaiganesh{at}


Mobile phone technology is gaining popularity in healthcare systems, particularly in providing clinical care to patients. A novel use of a mobile phone by a patient to record praecordial sounds (Hamman's crunch) is described which helped in the diagnosis of his condition.

  • Hamman sign
  • pneumothorax
  • crunch
  • mobile phone
  • chest–non trauma
  • imaging
  • x-ray

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  • Competing interests None.

  • Patient consent Obtained.

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