| continuous epidural anaesthesia | Insertion of a catheter into the lumbar or caudal epidural space for the repeated injection of local anaesthetic solutions as a means of prolonging duration of anaesthesia. Synonym: fractional epidural anaesthesia. (05 Mar 2000) |
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| cranial epidural space | The intracranial dura mater, consisting of two layers: the outer periosteal layer which normally always adheres to the periosteum of the bones of the cranial vault; and the inner meningeal layer which in most places is fused with the outer. The two layers separate to accommodate meningeal vessels and large venous (dural) sinuses. The meningeal layer is also involved in the formation of the various dural folds, such as the falx cerebri and tentorium cerebelli and is comparable to and continuous with the dural mater of the spinal cord. The cranial epidural space is then a potential space between the bone and the combined periosteum/periosteal layer of the dura mater realised only pathologically and is neither continuous with or comparable to the vertebral epidural space. Synonym: dura mater cranialis, dura mater encephali, cerebral part of dura mater, cranial epidural space. (05 Mar 2000) |
| haematoma, epidural | Accumulation of blood in the epidural space, due to damage to the middle meningeal artery and producing compression of the dura mater and thus compression of the brain. Unless evacuated, it may result in herniation through the tentorium, and death. (12 Dec 1998) |
| salmon patch | Interstitial or parenchymatous keratitis giving rise to neovascularization of the cornea. Synonym: Hutchinson's patch. (05 Mar 2000) |
| herald patch | The initial rapidly enlarging oval-shaped red papulosquamous lesion, usually on the trunk, heralding the widespread eruption of pityriasis rosea, and preceding the latter by 7-14 days. (05 Mar 2000) |
| Hutchinson's patch | Interstitial or parenchymatous keratitis giving rise to neovascularization of the cornea. Synonym: Hutchinson's patch. (05 Mar 2000) |
| shagreen patch | An oval-shaped nevoid plaque, skin-coloured or occasionally pigmented, smooth or crinkled, appearing on the trunk or lower back in early childhood; sometimes seen with other signs of tuberous sclerosis. Synonym: shagreen patch. (05 Mar 2000) |
| injections, epidural | The injection of drugs, most often analgesics, into the spinal canal without puncturing the dura mater. (12 Dec 1998) |
| inside out patch | A variant of the patch clamp technique, in which a disc of plasma membrane covers the tip of the electrode, with the inner face of the plasma membrane facing outward, to the bath. (18 Nov 1997) |
| opaline patch | A mucous patch of silver-gray appearance. (05 Mar 2000) |
| outside out patch | A variant of patch clamp technique, in which a disc of plasma membrane covers the tip of the electrode, with the outer face of the plasma membrane facing outward, to the bath. (18 Nov 1997) |
| epidural | <anatomy> Situated within the spinal canal, on or outside the dura mater (tough membrane surrounding the spinal cord), synonyms are extradural and peridural. (16 Dec 1997) |
| epidural abscess | This is a disorder which is characterised by inflammation and a collection of infected material (pus) in the area between the skull bone and the covering of the brain (meninges). Infection is usually caused by bacteria (Staphylococcus), but may be secondary to a fungal or viral infection. Epidural abscess can occur secondary to a chronic ear or sinus infection, penetrating head injury or mastoiditis. Fever, headache and neurologic symptoms are common. (27 Sep 1997) |
| epidural anaesthesia | Regional anaesthesia produced by injection of local anaesthetic solution into the peridural space. Synonym: peridural anaesthesia. (05 Mar 2000) |
| epidural anaesthetic | An anaesthetic injected into the epidural space surrounding the fluid-filled sac (the dura) around the spine which partially numbs the abdomen and legs. (12 Dec 1998) |