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Bronchial blocker-induced bronchospasm in a dog
  1. Alessandro Mirra and
  2. Isabelle Iff
  1. Department of Clinical Veterinary Medicine, Anaesthesia and Pain Therapy Division, Vetsuisse Faculty, University of Bern, Bern, Switzerland
  1. Correspondence to Dr Alessandro Mirra; alessandro.mirra{at}


A 12-year-old female labrador retriever weighing 27 kg required anaesthesia for an explorative thoracoscopy and intrathoracic mass biopsy. One lung ventilation was achieved using a bronchial blocker. After surgery, the dog was moved to the induction room with the bronchial blocker still in place. Once reconnected to an anaesthetic machine, absent capnography trace during mechanical ventilation, increased circuit pressure during manual ventilation and reduced tidal volume with subsequent haemoglobin desaturation occurred. After excluding other possible causes, bronchospasm due to direct bronchial blocker stimulation was suspected. Removal of the bronchial blocker, reintubation with a new endotracheal tube, administration of ketamine, adrenaline, isoflurane, theophylline and salbutamol led to the resolution of the clinical symptoms within four hours. No further episodes occurred. The dog was discharged in good general conditions seven days later.

  • anaesthesia
  • bronchospasm
  • bronchial blocker
  • dogs
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  • Contributors AM: anaesthesia of the described case, literature research and draft of the manuscript. II: supervision and assistance during case management, revision and approval of 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.

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

  • Data sharing statement No additional data are available.

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