| extradural | External (outside) to the dura mater. (16 Dec 1997) |
|---|---|
| extradural anaesthesia | Anaesthetization, by local anaesthetics, of nerves near the spinal canal external to the dura mater; often refers to epidural anaesthesia, but may include paravertebral anaesthesia. (05 Mar 2000) |
| extradural haematorrhachis | haematorrhachis externa |
| extradural haemorrhage | An accumulation of blood between the skull and the dura mater. Synonym: epidural haematoma. (05 Mar 2000) |
| extradural mass | <radiology> Disc, haematoma (traumatic fracture), metastasis (epidural, bony), abscess, neurofibroma, lipoma, arachnoid cyst (12 Dec 1998) |
| haematoma, subdural | Accumulation of blood in the subdural space. There are acute and chronic forms. They are usually the result of trauma. (12 Dec 1998) |
| subdural | <anatomy> Situated under the dura mater, or between the dura mater and the arachnoid membrane. Source: Websters Dictionary (01 Mar 1998) |
| subdural cavity | Originally thought to be a narrow fluid-filled interval between the dural and arachnoid; now known to be an artificial space created by the separation of the arachnoid from the dura as the result of trauma or some ongoing pathologic process; in the healthy state, the arachnoid is attached to the dura and a naturally occurring subdural space is not present. Synonym: spatium subdurale, cavum subdurale, subdural cavity, subdural cleavage, subdural cleft. (05 Mar 2000) |
| subdural cleavage | Originally thought to be a narrow fluid-filled interval between the dural and arachnoid; now known to be an artificial space created by the separation of the arachnoid from the dura as the result of trauma or some ongoing pathologic process; in the healthy state, the arachnoid is attached to the dura and a naturally occurring subdural space is not present. Synonym: spatium subdurale, cavum subdurale, subdural cavity, subdural cleavage, subdural cleft. (05 Mar 2000) |
| subdural cleft | Originally thought to be a narrow fluid-filled interval between the dural and arachnoid; now known to be an artificial space created by the separation of the arachnoid from the dura as the result of trauma or some ongoing pathologic process; in the healthy state, the arachnoid is attached to the dura and a naturally occurring subdural space is not present. Synonym: spatium subdurale, cavum subdurale, subdural cavity, subdural cleavage, subdural cleft. (05 Mar 2000) |
| subdural effusion | The leakage of cerebrospinal fluid into the subdural space. (12 Dec 1998) |
| subdural haematoma | <neurology, surgery> A serious type of head injury characterised by a collection of blood under the dura mater adjacent to the brain. Acute subdural haematomas are a surgical emergency that usually result from head trauma. (06 Mar 1998) |
| subdural haematorrhachis | haematorrhachis externa |
| subdural haemorrhage | Extravasation of blood between the dural and arachnoidal membranes; acute and chronic forms occur; chronic haematomas may become encapsulated by neomembranes. Synonym: subdural haematoma. (05 Mar 2000) |
| subdural hygroma | Accumulation in the subdural space of proteinaceous fluid, usually derived from serum, or of cerebrospinal fluid due to a tear in the arachnoid membrane. (05 Mar 2000) |