| ED | early-decision [applicant]; early differentiation; ectodermal dysplasia; ectopic depolarization; eff... |
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| EDH | epidural hematoma |
| ESCC | epidural spinal cord compression |
| ESI | elastase-specific inhibitor; enzyme substrate inhibitor; epidural steroid injection |
| IEMCT | individualized epidural morphine conversion tool |
| 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) |
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| 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) |
| injections, epidural | The injection of drugs, most often analgesics, into the spinal canal without puncturing the dura mater. (12 Dec 1998) |
| 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) |
| epidural block | An obstruction in the epidural space; used inaccurately to refer to epidural anaesthesia. (05 Mar 2000) |
| epidural cavity | The space between the walls of the vertebral canal and the dura mater of the spinal cord. Synonym: cavum epidurale, epidural space. (05 Mar 2000) |
| epidural haematoma | A serious type of head injury that is characterised by a collection of blood that lies outside of the dura mater (between the dura mater and the skull). Occurs secondary to major head trauma. The most common location on the skull for this type of injury is over the temple. The temporal bone when fractured can cause a tearing of an epidural blood artery. The progressive accumulation of blood (haematoma) in the epidural space leads to the development of neurologic symptoms and coma. Treatment includes surgical evacuation of the haematoma. (27 Sep 1997) |
| epidural meningitis | Inflammation of the outer surface of the dura mater. Synonym: epidural meningitis, external meningitis. (05 Mar 2000) |
| epidural neoplasms | Neoplasms located in the epidural space, at or above the dura mater of the spinal cord. (12 Dec 1998) |
| epidural space | Space between the dura mater and the walls of the vertebral canal. (12 Dec 1998) |
| fractional 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) |
| randomised controlled trial | A clinical trial that involves at least one test treatment and one control treatment, concurrent enrollment and follow-up of the test- and control-treated groups, and in which the treatments to be administered are selected by a random process, such as the use of a random-numbers table. Treatment allocations using coin flips, odd-even numbers, patient social security numbers, days of the week, medical record numbers, or other such pseudo- or quasi-random processes, are not truly randomised and a trial employing any of these techniques for patient assignment is designated simply a controlled clinical trial. (12 Dec 1998) |