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Biomedical subjects

M Benoist

Publications and source records attributed to M Benoist.

At least 145 records · Page 8Linked to original sources
PubMedDate not supplied

Postoperative lumbar epiduro-arachnoiditis. Diagnostic and therapeutic aspects.

Thirty-eight patients with the diagnosis of postoperative epiduro-arachnoiditis are reported upon. All had had previous surgery for disc herniation, and the diagnosis of epiduro-arachnoiditis was confirmed at repeat surgery. Massive epidural scarring with no coexistent pathologic condition was found in every patient, and adhesive arachnoiditis was noted in three. The common clinical presentation consisted of low-back pain and sciatica, and radicular pain was usually a continuation or a recurrence of the preoperative sciatic pain. Neurologic deficits were mild, and no patients with the classic picture of adhesive arachnoiditis were found. Myelographic patterns did not disclose any correlation with the clinical symptoms. Five myelograms were normal, while six others simulated a recurrent disc herniation. The results of scar excision were good in 13 patients, fair in eight, and a failure in 17.

Adult↗
PubMedDate not supplied

Treatment of lumbar disc herniation by chymopapain chemonucleolysis. A report on 120 patients.

Ninety of 120 patients with herniated lumbar discs who received an intradiscal injection of chymopapain achieved successful recovery. Sixteen of the 21 patients who underwent subsequent surgery had a good result. Study of the unsuccessful cases showed that disc sequestration and lateral stenosis were the major organic causes of failure. Certain radiologic criteria suggestive of sequestration and of important segmental stenosis are described. They appear to be a contraindication to chemonucleolysis. Psychogenic pain components and the failure of the enzyme to hydrolyse the nuclear proteoglycans in a few cases were the other two causes of poor results. A survey of postchemonucleolysis computed tomographic scans suggested that, although capable of digesting nuclear material in most cases, chymopapain may also work through an "anti-inflammatory" mechanism.

Adult↗
PubMedDate not supplied

The diagnosis of disc sequestration.

Sequestration of a disc herniation is an important cause of failure of chemonucleolysis. It therefore is important to recognize this particular variety of disc herniation before considering enzymatic discectomy. In order to determine the clinical and myelographic signs of sequestration, we reviewed the charts, myelograms, and surgical findings of 98 patients operated on for a disc herniation. A correlation was made between the three anatomic types of disc herniation found during surgery and the clinical and myelographic signs observed preoperatively. No characteristic clinical sign was found. No pathognomonic myelographic features were discovered. However, when the myelographic defect appears irregular and at a distance from the disc space, sequestration should be highly suspected.

Humans↗
PubMedDate not supplied

[Reproduction of cephalometric films with a soft-tissue outline].

The authors present a description of a radio-photographic technique aimed at providing on the same film a detailed picture of the skeleton together with sufficiently clear reproduction of the contours of soft tissue. This technique, the result of which resembles Xerography, provides a simple means of obtaining reproduction of bony structures and their relations with soft tissues.

Cephalometry↗
PubMedDate not supplied

Degenerative spondylolisthesis.

Degenerative spondylolisthesis is one important type of spinal stenosis. The spinal canal stenosis varies in degree. This is the result of anterior slipping of the whole vertebra, usually L4 on L5. The clinical picture is not greatly different from that observed in the other types of lumbar canal stenosis. The surgical management involves decompression of the cauda equina by laminectomy. Often this is associated with arthrectomy to decompress the nerve roots. Extensive excision of the neural arch may result in further spinal instability for which spinal fusion is generally advisable.

Aged↗