Beware of “curare cleft” like changes during unilateral capnothorax

  • Manila Singh
  • Kapil Chaudhary
  • Rajeev Uppal
  • Sachin Jain
Brief Report


Capnography is a standard monitoring tool during general anaesthesia. Diaphragmatic movement with the weaning of muscle relaxant effect produces the characteristic “curare cleft” on capnography. Various artefacts can mimick this trace intraoperatively. Cautious interpretation and identification of these is essential to avoid any undue overdosing of the patients with muscle relaxants. We report “curare cleft” like artefact during ventilation with a single lumen tube in a patient with unilateral capnothorax undergoing minimally invasive esophagectomy.


Unilateral capnothorax Single lumen tube Prone Curare cleft Capnography 


Conflict of interest



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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • Manila Singh
    • 1
  • Kapil Chaudhary
    • 1
  • Rajeev Uppal
    • 1
  • Sachin Jain
    • 1
  1. 1.Department of Anaesthesia and Intensive CareG.B. Pant HospitalNew DelhiIndia

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