摘要:

Nine patients with cervical spondylotic myelopathy, diagnosed during life, were subjected to detailed clinicopathologic study. The degree of cord destruction was in good correlation with the ratio of the anteroposterior diameter to the transverse diameter, designated as an anteroposterior compression ratio. Within the factors responsible for decrease in the ratio, developmental narrowing of the spinal canal was the most significant, and multiplicity of spondylotic protrusion less so. The former resulted in an extensive demyelination of the posterolateral funiculus and infarction of the gray matter. Recurrent trauma proved to cause distinct manifestations and cord pathology. Clinicopathologic correlations were also examined from the neurologic findings at the terminal stage.

ISSN:0362-2436    

出版商:OVID    

年代:1983

数据来源: OVID

摘要:

An analysis of 121 cases of cervical spondylotic myelopathy treated by anterior excision of the disc and fusion was undertaken. All patients were followed at least six months, and follow-up averaged 22 months. Results showed that 97.5% of patients had no aggravation of symptoms, 90.9% were improved, and 72.6% were able to resume normal activity. Surgical intervention can greatly improve the prospects of patients with severe cervical spondylotic myelopathy, and its use should not be lightly ruled out. Autografts yield higher fusion rates and better overall results than homografts. Selection of the number and level of discs to be excised depends upon clinical and roentgenographic indications, as well as the myelogram and the amount of fluid injected into the discs.

ISSN:0362-2436    

出版商:OVID    

年代:1983

数据来源: OVID

摘要:

The role of the narrow cervical spinal canal in the expression of clinical syndromes in the cervical spine was investigated in a retrospective review of 63 patients with symptomatic cervical spondylosis refractory to conservative therapy. The measurement of the developmental segmental sagittal diameter, determined at the level of the pedicle, and of the spondylotic segmental sagittal diameter, determined at the level of the disc, were applied. When divided into, groups based on anatomic variance around an average size midcervical diameter of 17 mm, 40 patients were found to have less than the average size of midcervical canal. A spondylosis index was computed for the narrow canal group at 2.08 mm per segment and for the wide canal group at 3.29. Canal dimensions are determinants of symptom production and neurologic compromise.

ISSN:0362-2436    

出版商:OVID    

年代:1983

数据来源: OVID

摘要:

In an attempt to reduce the radiation dose during the examination of scoliotic patients, several screen-film combinations have been compared with a conventional system used at present. Kodak's Lanex Regular screen with Kodak Ortho H film enables the dose to be reduced eight times without significant deterioration of the image quality. The dose to the mammary glands can be reduced further by a factor of five if posterior-anterior instead of anterior-posterior projection is used.

ISSN:0362-2436    

出版商:OVID    

年代:1983

数据来源: OVID

摘要:

The mechanical behavior of pseudarthrosis in posterior spinal fusion was investigated. A canine model was developed in which an incompletely ossified posterior fusion mass was consistently produced. The spines were excised, and the motion segments were mechanically tested using a specially developed loading apparatus. Tests were performed to evaluate stiffness of the segments to loading with compression, torsion, and anterioposterior and lateral bending shear stiffness. Changes in other modes of loading were less consistent. The motion characteristics of the pseudarthrosis could, not be predicted from the extent of the osseous defect noted on roentgenograms. These findings correlate clinically with the progression of curvature seen with pseudarthrosis in scoliosis surgery and the unpredictable results of pseudarthrosis in posterior fusion performed in treatment of degenerative disc diseas

ISSN:0362-2436    

出版商:OVID    

年代:1983

数据来源: OVID

摘要:

The application of the pelvic hoop for halo-pelvic distraction, as described by O'Brien, has led to serious abdominal complications. A study of mature Caucasian pelves as compared to the smaller East Indian pelves has shown that in the larger pelvis, when the gluteal tubercle and posterior superior iliac spine are used as landmarks, as advocated by O'Brien, the pins will invariably pass within the soft tissue elements of the inner pelvis instead of being entirely within the bony ilium, as O'Brien noted in the Chinese pelves. On the basis of pelvic measurements and observations, the authors recommend an open technique for passage of the pins.

ISSN:0362-2436    

出版商:OVID    

年代:1983

数据来源: OVID

摘要:

A case is presented of a 22-year-old female Jehovah's Witness with severe kyphoscoliosis, who was successfully treated surgically by carefully staged posterior and anterior spine fusions completed with the use of intraoperative hemodilation techniques. Three spinal procedures were carried out at intervals, and no blood transfusion was given at any of them

ISSN:0362-2436    

出版商:OVID    

年代:1983

数据来源: OVID

摘要:

Two patients with congenital scoliosis underwent surgical correction with segmental spinal instrumentation and fusion. This technique, coupled with spinal monitoring, provides greater correction of a curve than does cast treatment and eliminates the risk of neurologic injury associated with distraction.

ISSN:0362-2436    

出版商:OVID    

年代:1983

数据来源: OVID

ISSN:0362-2436    

出版商:OVID    

年代:1983

数据来源: OVID

摘要:

In order to clarify the mechanism of symptom production of sciatica or intermittent claudication, the interrelation between lumbosacral nerve roots and their surrounding tissues was analyzed in 75 cadavers. The running course of nerve roots can be changed by congenital anomalies and by acquired lesions, such as compression by articular facets. Ossification of spinal ligaments may also cause nerve root compression. The space around the nervous tissue, both in the spinal canal and in the intervertebral foramen, is narrower in the male than in the female. Membranous structures, an epidural membrane, and an epiradicular sheath can be found around nerve roots. Their existence is correlated with a serpentine figure of the roots observable by selective radiculography

ISSN:0362-2436    

出版商:OVID    

年代:1983

数据来源: OVID