• J Clin Monit Comput · Apr 2014

    Letter Case Reports

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

    • Byrappa Vinay, Kamath Sriganesh, and Kadarapura Nanjundaiah Gopala Krishna.
    • Department of Neuroanaesthesia, National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore, 560 029, India.
    • J Clin Monit Comput. 2014 Apr 1;28(2):217-9.

    AbstractVenous 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.

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