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An abrupt reduction in end-tidal carbon-dioxide during neurosurgery is not always due to venous air embolism: a capnograph artefact.

Abstract
Venous air embolism (VAE) is a well recognized complication during neurosurgery. Pre-cordial doppler and trans-esophageal echocardiography are sensitive monitors for the detection of VAE. A sudden, abrupt reduction in the end-tidal carbondioxide (ETCO2) pressure with associated hypotension during neurosurgery might suggest VAE, when more sensitive monitors are not available. We describe an unusual cause for sudden reduction in ETCO2 during neurosurgery and discuss the mechanism for such presentation.
AuthorsByrappa Vinay, Kamath Sriganesh, Kadarapura Nanjundaiah Gopala Krishna
JournalJournal of clinical monitoring and computing (J Clin Monit Comput) Vol. 28 Issue 2 Pg. 217-9 (Apr 2014) ISSN: 1573-2614 [Electronic] Netherlands
PMID23996497 (Publication Type: Case Reports, Letter)
Chemical References
  • Carbon Dioxide
Topics
  • Adult
  • Artifacts
  • Breath Tests (methods)
  • Capnography (methods)
  • Carbon Dioxide (analysis)
  • Diagnosis, Differential
  • Embolism, Air (diagnosis, etiology)
  • Humans
  • Male
  • Monitoring, Intraoperative (methods)
  • Neurosurgical Procedures (adverse effects)
  • Tidal Volume
  • Venous Insufficiency (diagnosis, etiology)

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