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Evaluation with subdural plates in children and adolescents.

Noninvasive EEG examination is not always adequate for the determination of the epileptogenic area. In such cases invasive methods are required. The authors report on their experience with the implantation of subdural plates for the precise ictal and inter-ictal determination of the epileptogenic areal and the stimulation of the eloquent cortex. From December 1992 to December 1997, 97 patients were evaluated in the Bethel epilepsy center using subdural plates. Of these patients, 44 were children or adolescents, who underwent 45 resections. In order to be able to draw differentiated conclusions on the use of subdural plates in children and adolescents, these patients were divided into three age groups: Group 1, 0-5 years (n = 12); Group 2, 6-11 years (n = 13 + 1 repeat evaluation and resection); Group 3, 12-18 years (n = 19). In the groups of children and adolescents examined there were no complications or progress impediments which might give reason to assume that the application of these techniques involves risks or hazards. This has been verified by the results, in which 75% of age Groups 1 and 3 were categorized as 1 a/b or 2d according to the Engel classification.

Adolescent↗

Subdural empyema.

Explore the source record for details and available documents.

Brain Abscess↗

Magnetic resonance imaging of chronic subdural hematoma.

This article highlights the unique ability of magnetic resonance imaging in evaluating the evolution of the subdural hematoma. Topics specifically discussed are computed tomography sensitivity and the extent, age, and complexity of the subdural hematoma.

Brain↗

Convulsive seizures following subdural application of fibrin sealant containing tranexamic acid in a rat model.

OBJECTIVES: Tranexamic acid (t-AMCA) has been shown to cause severe convulsions in humans and cats when applied topically to the central nervous system. We wanted to determine whether pure t-AMCA or fibrin sealant (FS) containing t-AMCA would induce similar effects when applied to the spinal cord in a rat model. METHODS: Following low-thoracic laminectomy, the dura was incised to expose the dorsal surface of the lumbar enlargement. Rats were allocated to one of the following treatments: 1) t-AMCA (10 mg/ml), 2) vehicle (phosphate buffered saline), 3) FS containing t-AMCA, 4) FS containing aprotinin. The response of the rats was evaluated based on neurological and behavioral observations. Additionally, motor function was scored in the rats that had received FS. RESULTS: Application of either 10 mg/ml t-AMCA or FS containing t-AMCA caused severe hind limb spasms that developed into spontaneous generalized convulsions. Two of the three rats that had received FS containing t-AMCA died of respiratory failure. In contrast, application of vehicle or FS containing aprotinin did not cause any abnormal conditions of the animals. CONCLUSION: Tranexamic acid may cause severe complications when used in the central nervous system. Thus, fibrin sealants containing t-AMCA should not be used in neurosurgery.

Animals↗

[Chronic subdural hematoma: diagnostic imaging studies].

CT-scan is able to provide the diagnosis of chronic subdural hematoma in more than 90% of the cases. It usually shows a peri-cerebral fluid collection along the convexity, with a convex outer border, and an irregular concave inner border. The density of the collection depends on the age of the hematoma. The main difficulties, in term of diagnosis, result from bilateral isodense chronic subdural hematoma, and differential diagnosis between hematoma, hygroma, and empyema. Some rare localisations can sometimes be seen (posterior fossa, skull base...). A double density with a sedimentation level, or heterogeneity of the hematoma, can sometimes be seen too. Chronic subdural hematoma is demonstrated by MRI in almost 100% of the cases. The intensity of the collection, in T1 and T2 sequences, depends on the age of the hematoma.

Diagnosis, Differential↗

[Rhinogenic subdural abscesses in childhood and their successful treatement (author's transl)].

Three cases of rhinogenic subdural abscesses are described, and the characteristic symptoms of the lesions summarized. Each presents a typical temporal sequence which is similar to that of frontal brain abscesses and permits differentiation of each into initial, latent and terminal stages. In collaboration with our neurosurgeon, a treatment was devised which included drilling two or more bore holes over the abscess area and irragating this site with an antibiotic solution. This technique provided favourable conditions for rhinosurgical operation as well as for complete healing.

Adolescent↗

Spinal subdural epidermoids - a separate entity: report of 3 cases.

Intradural extramedullary epidermoid cysts are rare tumors especially those not associated with spinal dysraphism. We report 3 cases of spinal intradural extramedullary epidermoid cysts. In all the cases, the lesion was situated at dorsal level. The clinical features, MRI characteristics and surgical treatment of such rare intradural extramedullary benign tumors are discussed and relevant literature is reviewed.

Adult↗