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. Author manuscript; available in PMC: 2017 Oct 1.
Published in final edited form as: Neurosurg Clin N Am. 2016 Aug 10;27(4):465–472. doi: 10.1016/j.nec.2016.05.006

Figure 1.

Figure 1

Nuclear magnetic resonance (NMR) spectra of arterial blood plasma (Art), jugular venous blood plasma (Jug), cerebrospinal fluid (CSF), and urine. Biospecimens were obtained from a TBI patient within a 5 minute period. The UCLA BIRC research nurse and a research assistant visit the bedside together and, following biofluid draws by the research nurse, samples are immediately placed on ice and processed by the research assistant. Urine and CSF are transferred to Falcon tubes, centrifuged, and frozen on dry ice, and transferred to a −80°C freezer as soon as possible. Blood is transferred to lithium heparin coated tubes, centrifuged, and plasma retained for the freezer.