Can somatosensory evoked potentials predict outcome from coma?
(1992)
Journal - Clinical EEG (electroencephalography) (UNITED STATES )
Abstract :
Long-term somatosensory evoked potential (SEP) recordings for a period of 2 1/2 years are reported for a patient rendered comatose from hypoxic encephalopathy. Findings are compared with previously published reports on poor outcome associated with bilaterally absent cortical responses. In the present case, the patient was admitted with poor neurological status but has preserved cortical responses bilaterally throughout his course until his final recovery and return to previous employment. Somatosensory cortical responses when bilaterally absent are universally associated with poor outcome; however, when persistently present they can indicate hope of recovery despite poor clinical status on admission.
| ISSN : | 0009-9155 |
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| Mesh Heading : | Adult Coma Humans Male Prognosis Reaction Time |
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| Mesh Heading Relevant : | Evoked Potentials, Somatosensory physiopathology |
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Predictive value of the electroencephalogram in acute hemispheric lesions.
(1989)
Journal - Clinical EEG (electroencephalography) (UNITED STATES )
Abstract :
We studied the electroencephalogram and computed tomography in twenty cases with ischemic strokes with unilateral electroencephalographic slowing associated with abnormality of background activity on the contralateral side, compared with twenty other cases who had primarily unilateral electroencephalographic abnormality and no contralateral slowing. Electrographic parameters evaluated included field, amplitude, frequency, persistence and reactivity of focal or lateralized slowing. Computed tomographic findings studied included lesion size, density, mass effect and location. Clinical findings studied included level of consciousness and outcome. Contralateral abnormality of background rhythm correlated with impairment of consciousness and poor outcome.
| ISSN : | 0009-9155 |
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| Mesh Heading : | Acute Disease Adult Aged Brain Ischemia Cerebral Hemorrhage Cerebral Infarction Female Functional Laterality Humans Male Middle Aged Predictive Value of Tests Tomography, X-Ray Computed physiopathology physiopathology radiography physiology |
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| Mesh Heading Relevant : | Electroencephalography physiopathology |
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Absence status epilepticus resulting from metrizamide and omnipaque myelography.
(1988)
Journal - Clinical EEG (electroencephalography) (UNITED STATES )
Abstract :
Two cases of absence status are described, one case following metrizamide myelography and the other from omnipaque myelography. Metrizamide has been well known to cause convulsive seizures even in patients without epilepsy. The exact mechanism is not known but appears to be direct neuronal toxic effects possibly due to competitive inhibition of hexokinase activity. The acute confusional state following myelography from water soluble agents is reviewed. In view of the difficulty in clinical diagnosis and the excellent response to anticonvulsant therapy, the possibility of this clinical entity should be specifically excluded by EEG in any person suffering from prolonged confusion following myelography with water soluble agents.
| ISSN : | 0009-9155 |
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| Mesh Heading : | Aged Electroencephalography Female Humans Iohexol Metrizamide Middle Aged Myelography Status Epilepticus physiopathology |
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| Mesh Heading Relevant : | adverse effects adverse effects adverse effects chemically induced |
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Use of somatosensory evoked responses in the prediction of outcome from coma.
(1988)
Journal - Clinical EEG (electroencephalography) (UNITED STATES )
Abstract :
Present data on 60 comatose patients with head trauma, hypoxia and cerebrovascular disease suggested that SER may yield quantitative, useful information concerning the functional state of the cerebral cortex. To assess the prognosis of individual patients we propose to classify patients from various etiologies of coma into the following categories: I. If there is bilateral absence of cortical responses, irrespective of the etiology of coma, none of these patients recover. II. If the initial cortical responses in the first 24 hours are normal, then it is imperative that these should be repeated in the first week before any definitive prognosis can be given, (since as in one case, we noted on the fifth day there was distortion of amplitude of his response and eventually the cortical responses were unobtainable, therefore indicating a poor prognosis). III. Patients who have normal responses throughout the acute course of illness carry an excellent prognosis from coma of all etiologies, except with ischemic etiology. The prognosis remains favorable for recovery from coma, but these patients may remain with significant neurological deficits. IV. When there is a 75% drop in the amplitude of the responses, it indicates a poor prognosis for ultimate neurological recovery, and the majority of these patients will remain in a persistent vegetative state. V. In patients with intermediate reduction in amplitude, 25-50% carried a moderate prognosis, and the majority of these cases in our series were able to perform activities of daily living.
| ISSN : | 0009-9155 |
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| Mesh Heading : | Adolescent Adult Aged Aged, 80 and over Brain Injuries Cerebrovascular Disorders Coma Female Heart Arrest Humans Male Middle Aged Predictive Value of Tests Prognosis complications physiopathology complications physiopathology etiology complications physiopathology |
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| Mesh Heading Relevant : | Evoked Potentials, Somatosensory physiopathology |
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