intrathecal
Pronunciation: in-trah-THEE-kal
Pertaining to the space within the dural sac containing cerebrospinal fluid, relevant for drug delivery and diagnostic procedures.
Full Definition
Intrathecal refers to the anatomical space within the dural sac that contains cerebrospinal fluid and surrounds the spinal cord and nerve roots. In spine surgery contexts, intrathecal is most commonly referenced in relation to medication delivery (such as intrathecal pumps for chronic pain management), contrast injection for myelography, or accidental dural tears that allow communication with the intrathecal space. Understanding intrathecal anatomy is crucial for recognizing complications such as CSF leaks and for managing patients with implanted intrathecal drug delivery systems.
Usage
Usage note: Distinguish from epidural space; specify when referring to drug delivery vs. anatomical location.
In Context
- "The patient has an intrathecal morphine pump for chronic pain management." — preoperative assessment
- "Intrathecal contrast was administered for the CT myelogram study." — radiology procedure note