Cerebrospinal fluid (CSF) TRAP. A method to improve CSF laboratory efficiency.

Establishment of a procedure termed cerebrospinal fluid (CSF) TRAP ("Transport and Rapid Accessioning for Additional Procedures") allows clinicians to appropriately store, at -75 degrees C, and rapidly access CSF specimens. The CSF TRAP enhances patient care by decreasing the need for repeat lumbar punctures and providing reserve fluid for the following: (1) further CSF testing; (2) repeating questionable test results; and (3) laboratory accidents. The CSF TRAP has been approved for third-party payment because it promotes efficient laboratory utilization by encouraging clinicians to review initial CSF findings before ordering low-yield CSF assays such as the venereal disease research laboratory (VDRL) and cryptococcal antigen latex agglutination tests. Currently, CSF TRAP samples are being obtained with 40% of all CSF acquisitions at the Duke University Medical Center. The availability of the CSF TRAP was associated with a significant decrease in the ordering of CSF VDRL and cryptococcal antigen assays (P less than 0.05); however, there was no significant change in the proportion of those studies being performed on normal CSF. The CSF TRAP procedure provides the framework for an overall restructuring of CSF testing that is being investigated.