The use of a non-invasive method to measure intrapulmonary shunt during one-lung anaesthesia.
The Non Invasive Virtual Shunt computer program has previously been described and validated. The system has subsequently been developed to give a real time, continuous trace of virtual shunt. A portable computer connected to routine monitoring equipment displays a plot of virtual shunt updated every 10 s. A practical use of this device in the clinical setting of one-lung anaesthesia is described. The equipment was used to monitor shunt before, during and after surgery in three patients. In one case, a displaced double lumen bronchial tube was detected before there was any other indication of the problem.
Dingley
J
J
Department of Anaesthesia and Intensive Care Medicine, University of Wales College of Medicine, Cardiff.
Hope
D A
DA
Vaughan
R S
RS
D000328:Adult; D000768:Anesthesia, General; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000601:surgery; D008297:Male; D008875:Middle Aged; D016343:Monitoring, Intraoperative / Q000379:methods; D008991:Monitoring, Physiologic / Q000379:methods*; D011652:Pulmonary Circulation; D012121:Respiration, Artificial / Q000379:methods; D012815:Signal Processing, Computer-Assisted; D013908:Thoracotomy