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Neurone-specific enolase and Sangtec 100 assays during cardiac surgery: part I - the effects of heparin, protamine and propofol

Department of Anaesthesia, Royal Postgraduate Medical School, London

D NF Harris

Department of Anaesthesia, Royal Postgraduate Medical School, London

S Sapsed-Byrne

Department of Anaesthesia, Royal Postgraduate Medical School, London

S Sharp

Department of Special Haematology, Royal Postgraduate Medical School, London

Neurone-specific enolase (NSE) and Sangtec 100 (S-100) (Sangtec Medical, Sweden) assays are designed for clotted samples, but when studying cerebral damage following cardiac surgery, perioperative samples will contain heparin and/or protamine. The lipid emulsion propofol is also frequently used during cardiac surgery and could affect the assays. We, therefore, studied the effects of heparin, protamine and propofol on the accuracy of NSE and S-100 assays in five healthy patients. Blood samples were taken and divided into four groups: normal saline was added to group A; heparin to group B; heparin followed by protamine to group C; and propofol to group D. NSE and S-100 concentrations were measured for all samples. Neither heparin, protamine nor propofol affected the accuracy of S-100 and NSE assays; therefore, samples can be taken throughout operations involving cardiopulmonary bypass without influencing the results.

Perfusion, Vol. 12, No. 3, 163-165 (1997)
DOI: 10.1177/026765919701200303


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