Abstract
A novel flow-regulated external drain (FRED) was devised to overcome the problems of the pressure-regulated systems and serial lumbar taps. Eleven patients who underwent lumbar external drainage received a flow-regulated system using simple and inexpensive materials available in most hospital settings. The system proved to be reliable at removing a set amount of cerebrospinal fluid (CSF). We did not encounter any serious complications in its application. The FRED system offered better patient compliance and comfort, providing them with greater mobility, while maintaining a safer steady removal of a set amount of CSF. In opposition to the pressure-regulated systems, we describe the possible indications, advantages and disadvantages of a flow regulated device. Extensive clinical trials are needed to study the use of FRED in patients with different CSF circulation physiology, pressure and composition.
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