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Biomedical subjects

E G Dawson

Publications and source records attributed to E G Dawson.

9 recordsLinked to original sources
PubMed1991

Spinal cord monitoring. Results of the Scoliosis Research Society and the European Spinal Deformity Society survey.

The Scoliosis Research Society (SRS) and the European Spinal Deformity Society (ESDS) membership was surveyed regarding the use of intraoperative monitoring of somatosensory evoked potentials in spinal surgery. A total of 242 people responded, with 188 using intraoperative monitoring. A second survey was distributed detailing the technical aspects of monitoring, of which 71 were returned. A total of 342 neurologic deficits were reported to have occurred with monitoring in place. Two hundred forty-six (72%) were accurately detected, and 96 (28%) were not detected by sensory cord evoked potentials (SCEP). There were 1,003 false-positive cases reported. The incidence of false-negative cases was related to those not monitoring both latency and amplitude, to using fewer recording electrodes, and with those surgeons doing more kyphosis corrections.

Europe↗
PubMed1978

Scoliosis in arthrogryposis multiplex congenita.

Scoliosis was evident in eighteen of eighty-eight patients with arthrogryposis multiplex congenita. The predominant pattern of spinal deformity was a structural thoracolumbar double curve that extended to the sacrum and was associated with pelvic obliquity and lumbar hyperlordosis. Significant contractures about the hips, dislocation of the hip, or both were present in all patients but one. Most of the curves were progressive and they became rigid and fixed at an early age. There was progression of the pelvic obliquity coincident with progression of the curve. Treatment by corrective casts or a Milwaukee brace was ineffective and if surgical treatment directed at the pelvic obliquity did not correct that deformity, spine fusion to the sacrum appeared necessary.

Adolescent↗
PubMed1977

Methylmethacrylate as an adjunct in spinal instrumentation.

Sixteen patients with scoliosis were treated with Harrington-rod instrumentation supplemented by methylmethacrylate fixation at the distraction sites to reduce the possibility of dislodgement of a hook due to inferior bone stock or the patients' inability to cooperate postoperatively because of mental insufficiency or involuntary-movement disorders. Follow-up ranged from six to thirty-eight months (average, fourteen and one-half months). There were no complications related to the use of methylmethacrylate in these patients.

Casts, Surgical↗
PubMed1976

Solitary bone cyst of the cervical spine.

A histologically proven case of solitary bone cyst of a cervical vertebral body seems not to have been previously reported. Cysts of sufficient size to be a potential source of pathologic fracture should be excised and filled with autologous bone grafts.

Adult↗
PubMed1975

Fiberglass casts.

Explore the source record for details and available documents.

Casts, Surgical↗
PubMedDate not supplied

Cervical osteoid osteoma: a cause of chronic upper back pain.

A case of an osteoid osteoma occurring in the cervical spine and presenting as scapular and arm pain has been described. Correct diagnosis was delayed for 2 years. Plain radiographs may fail to demonstrate a lesion in the spine. Radiographic evaluation, when osteoid osteoma is a possibility, should include bone scanning. If the bone scan is abnormal, tomography of the area is indicated. If the diagnosis is still unclear, selective angiography may reveal the tumor blush typical of osteoid osteoma. In certain instances, a myelogram may be helpful to establish whether there is encroachment on the spinal canal or nerve root.

Adult↗
PubMedDate not supplied

Radiographic evaluation of scoliosis: a reassessment and introduction of the scoliosis Chariot.

Serial evaluation of scoliosis relies on measurement of curvature on radiographs. Progression or improvement is based solely on the assumption that the radiograph gives a true picture of the configuration of the spine in the AP projection, and that patient position remains constant with serial radiographs. Slight rotation of the patient allows the kyphosis or lordosis normally present in the spine to either increase or decrease the measured scoliosis curve, depending on the direction of rotation. Reliance on technician positioning of the patient introduces a random error of such a magnitude as to make serial evaluations invalid. The use of the Scoliosis Chariot as a positioning device guarantees reproducibility of patient position, thus eliminating the problem of random error.

Humans↗