Integra Lifesciences INS-1100 MoniTorr ICP External CSF Drainage & Monitoring System With Anti-reflux Valve In Bag A collection of sterile devices intended for short-term access to the brain ventricles to drain cerebrospinal fluid (CSF), and/or other fluids of similar physical characteristics, as a means of reducing CSF volume and intracranial pressure (ICP). It includes an intracerebral infusion/drainage catheter and devices intended for catheter insertion (e.g. stylet) and CSF collection (e.g., drip chamber, drainage bag, tubing set). This is a single-use device.