a sterile, hollow, metal tube with a sharp bevel edge that is used to deliver anesthetic or analgesic medications intrathecally, remove a sample of the cerebrospinal fluid (CSF), and/or assist in inserting an intrathecal catheter (such as a spinal catheter or lumboperitoneal shunt). It is usually formed of metal and plastic components, is fenestrated, spring-tipped, and is used for temporary administration. This item is single-use only.