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- W2005400070 abstract "Documented relaxation time measurements of body fluids such as cerebrospinal fluid (CSF) vary considerably. This may be largely due to lack of an appropriate method of maintaining the in vivo physiological and biochemical characteristics of the fluid. We have developed an in vitro technique that maintains the in vivo characteristics of body fluid samples for a sufficiently long period to establish the true relaxation times. To illustrate this we studied changes in CSF pH, pO2, and pO2, first as it equilibrated with air and then under anaerobic conditions as found in vivo. Relaxation times of CSF were then studied under aerobic and anaerobic conditions. Under the particular aerobic conditions used the pH and pO2 of CSF increased quickly and pO2 fell within the first 30 min. By 3–4 h equilibration with air was complete. The T1 and T2 relaxation times of CSF decreased by 14 and 16%, respectively, as a result of these physicochemical changes. It is important that such changes be considered when relaxation measurements of any body fluid are performed in vitro and efforts to maintain the in vivo milieu should not be neglected. © 1988 Academic Press, Inc." @default.
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- W2005400070 date "1988-04-01" @default.
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- W2005400070 title "Temporal physicochemical changes duringin vitro relaxation time measurements: The cerebrospinal fluid" @default.
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- W2005400070 doi "https://doi.org/10.1002/mrm.1910060405" @default.
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