[Acute renal insufficiency: technic for extrarenal purification].
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Biomedical subjects
Publications and source records attributed to C Viaud.
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The authors report a case of dolichoectasic intracranial arteries associated with an aneurysm of the abdominal aorta. The patient presented with a double hemorrhagic vascular rupture, the abdominal aortic aneurysm being operated on as an emergency, with a favorable outcome. The cerebral and aortic angiograms showed extension of the pathological process to the large caliber arteries. Microcirculatory investigations at the nail bed and conjunctiva also showed distal lesions. The vascular abnormality underlying these multiple ectasic lesions would seem to be different to that of classical arteriosclerosis. Anatomopathological studies reported in the literature describe fibrous degenerative lesions of the media differing from those observed in fibromuscular dysplasia.
Diastematomyelia is rarely diagnosed in adulthood, and apparently 8 cases only have been reported. We report here a 59 year-old woman who recently experienced backpain with irradiations to lower limbs, mild distal weakness and sphincter disturbances. Diastematomyelia was suspected because of a history of lumbar "cutaneous malformation" operated when 4 month old, and a hairy patch over the lumbar spine. C.T. scan showed diastematomyelia and revealed a posterior spur of bone protruding into the sagittal plane from the posterior part of L3 and L4 and dividing the posterior part of the low inserted spinal cord. It appears that, when diastematomyelia has been diagnosed in adulthood, the level of the malformation was lower than when diagnosed in childhood.
A syringoperitoneal shunt is a one-way drain that empties cerebrospinal fluid from the pathological syringomyelic cavity into the abdomen. This treatment technique is based on the principle that the signs and symptoms of syringomyelia are caused by insidious interference with the condition of nerve signals in the spinal cord tracts due to either tearing or compression of the tracts by the distended cavity. A series of eight patients suffering from this disorder were operated upon using a syringoperitoneal shunt. The initial results seem to indicate that this technique is especially useful when pain, atrophy, or both dominate the clinical picture. Clinical signs, diagnostic studies, and surgical considerations are discussed.
Chemonucleolysis is widely used in the treatment of disease of the lumbar intervertebral disk. From a series of 34 patients the authors report their experience using this technique at the cervical level using aprotinin instead of chymopapain in cervical soft disk protrusion. They underline the technique, mechanism of aprotinin and indications.
We describe 5 patients with spinal epidural abscesses in whom computed tomographic scanning confirmed diagnosis without the use of myelography. One patient required urgent surgery because of rapidly deteriorating neurological status, but the other 4 were treated nonsurgically. The medical treatment of these patients and 9 others described in the literature consisted of antibiotics administered parenterally for a minimum of 8 weeks, followed by oral antibiotic therapy. Early diagnosis with computed tomographic scanning and a benign neurological state at the onset of treatment were associated with good results.
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The association of a meningioma and an arachnoid cyst is one of the many association of cyst and meningioma. The diagnosis could be difficult by CT scan. We report three cases of parameningiomal cysts and discuss their different mechanism of formation before stressing practical problems.
Twenty one patients with a spinal cord cavity are reported: 14 presented syringomyelia, 3 had a syringomyelic syndrome of another etiology, 4 had clinical symptoms different from those usually observed with such cavities. All patients had a plain C.T. and 20 had a C.T. of cervical and thoracic spinal cord 6 hours after cervical myelography with metrizamide or iopamiron. Morphologic and dynamic features given by this examination are reported. They allowed a discussion about the pathogenesis of the cavity: some cases were consistent with Gardner's theory, but the majority were consistent with Aboulker's. Nine patients had an examination by magnetic resonance imaging which gave the morphologic features necessary for the treatment: spinal cord cavity, Chiari malformation, hydrocephalus. Eleven patients were treated by a syringoperitoneal shunt: in spite of the short follow-up, the results seem favourable, especially for sensitivity and trophic troubles. Surgery should be based upon aggravating course and hydrocephalus. The results of syringoperitoneal shunting allow new considerations about pathogenesis.
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Repeat computed tomography has enabled us to confirm the concept of delayed hematomas. With this in mind we report two cases of alternating, post-traumatic intracranial hematomas; confirming also the role of tamponade after surgical removal of an intracranial hematoma.
Chemonucleolysis is widely used in the treatment of disease of the lumbar intervertebral disk. From a series of 28 patients, the authors report their experience using this technique at the cervical level using aprotinin instead of chymopapain.
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