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Dynamic laryngeal narrowing in COPD may have effects on the trachea
  1. Paul Leong,
  2. Simon Joosten,
  3. Garun Hamilton,
  4. Philip G Bardin
  1. Monash Lung & Sleep, Monash Health, Clayton, Victoria, Australia
  1. Correspondence to Dr Paul Leong, Monash Lung & Sleep, Monash Health, 246 Clayton Rd, Clayton, VIC 3168, Australia; paul.leong{at}

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Dear Editor,

Dyspnoea and exercise intolerance in patients with COPD have a wide variety of aetiologies, with dynamic hyperinflation and resultant loss in inspiratory reserve volume recognised as important mechanisms.

Baz et al1 show that dynamic laryngeal narrowing is present in patients with COPD and hypothesise that this generates intrinsic positive end-expiratory pressure (PEEPi), serving to ‘splint’ open …

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  • Contributors PL wrote the original draft. All authors participated in contributing ideas, revising the manuscript and consent to publication.

  • Competing interests None declared.

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

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