00N23ZZ
Release Dura Mater to No Qualifier with No Device, Percutaneous Approach
Procedural Specifications
| Clinical Axis | Detail Definition |
|---|---|
| Section | 0 Medical and Surgical |
| Body System | 0 Central Nervous System and Cranial Nerves |
| Operation | N Release |
| Body Part | 2 Dura Mater |
| Approach | 3 Percutaneous |
| Device | Z No Device |
| Qualifier | Z No Qualifier |
Operation Definition
Freeing a body part from an abnormal physical constraint by cutting or by the use of force
Procedure Overview
Release procedures free the brain, spinal cord, or a cranial nerve from an abnormal band of scar tissue, adhesion, bony compression, or other physical constraint that is restricting its normal position or movement. A tethered spinal cord release, where filum terminale tissue anchoring the cord abnormally low in the spinal canal is divided, and lysis of adhesions compressing a cranial nerve are typical examples.
These procedures address conditions where something outside the neural structure itself is pressing on or pulling it out of place, causing pain, weakness, sensory changes, or progressive neurological decline. Unlike removing a mass or repairing damaged tissue, the goal is specifically to cut or otherwise separate the constraining material so the nerve or spinal cord can move and function normally again.
Release is often performed when a patient's symptoms are directly tied to restricted movement or traction on neural tissue, and surgical success is judged by whether that constraint has been eliminated.
Anatomy & Axis Detail
Dura Mater
The dura mater is the tough, fibrous outermost meningeal layer lining the inside of the skull and spinal canal, and it commonly develops adhesions to the brain or spinal cord after trauma, tumor resection, or previous surgery. Releasing the dura involves sharply or bluntly separating these fibrous bands so the underlying neural tissue is no longer tethered or compressed, a step frequently needed before further intracranial or intraspinal work can proceed safely. Because the dura is richly innervated and adjacent to venous sinuses, careful dissection planes are used to avoid bleeding or cerebrospinal fluid leakage during the release. This procedure is distinct from a durotomy performed simply for access, since here the intent is specifically to free constrictive scarring. The operative report should clarify whether adhesiolysis occurred cranially or spinally to guide correct body part selection.
Approach: Percutaneous
Percutaneous describes entry by needle or instrument puncture through the skin or mucous membrane to reach the site of the procedure, without cutting the tissue open or using a visualizing scope. It differs from Open in that the site itself is never exposed, and from Percutaneous Endoscopic in that no endoscope is used to see internal structures. Common examples include needle biopsies and injections.
Coding & Documentation
Documentation should clearly describe the constraining structure, such as adhesions, a fibrous band, or scar tissue, and confirm that the surgeon's objective was to free the neural structure rather than remove diseased tissue from it. The operative note ideally states what was cut or divided and confirms the structure was subsequently mobile.
A frequent mistake is coding Release when the procedure actually removed abnormal tissue attached to or growing on the nerve, which should be captured as Excision instead, since the definitions hinge on whether tissue is taken out or simply freed. Another common issue is applying Release to a decompression that involved removing bone, such as a laminectomy for spinal stenosis, when the bony removal itself may need to be coded as Excision on the corresponding skeletal body part rather than, or in addition to, Release on the neural structure. Coders should confirm exactly which structure, the nerve or the surrounding bone, was the target of the constraining tissue removal.