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Biomedical subjects

S Aaro

Publications and source records attributed to S Aaro.

31 records · Page 2Linked to original sources
PubMed1983

The effect of Harrington instrumentation on the sagittal configuration and mobility of the spine in scoliosis.

The spinal mobility and sagittal configuration in 96 scoliotic patients treated according to Harrington were investigated with a Debrunner kyphometer and a Myrin inclinometer. The more distal the fusion limit in the lumbar spine, the more reduced was the lumbar lordosis and flexion. The patients' own estimation of lumbar rigidity and pain, scored on visual analogue scales, increased as the fusion limit increased distally. The results for the thoracic spine's sagittal configuration and mobility were analogous but the trend was less pronounced. The patients' estimation of thoracic rigidity had little correlation with the number of segments fused. This study shows that fusion of the lumbar spine below L3 is to be avoided, except when specifically indicated. Furthermore, the study shows that the present technique does not adequately preserve the sagittal configuration of the thoracic and lumbar spine.

Adolescent↗
PubMed1983

Teratologic congenital dislocation of the hip. Report of two cases.

The incidence of teratologic dislocation of the hip is about 0.04 per thousand. Teratologic CDH is usually described together with other anomalies, such as arthrogryposis. Quite different opinions about the diagnostic criteria are found in the literature; some of these are reviewed in this report. Two cases of teratologic CDH with no other anomalies are also reported. Computer tomography was used to confirm reduction in plaster when conventional radiologic examination gave ambiguous results.

Child, Preschool↗
PubMed1983

Long-term effect of Boston brace treatment on renal function in patients with idiopathic scoliosis.

The long-term effects of Boston brace treatment on renal function were studied in 20 patients with idiopathic scoliosis. Renal function was tested by clearances of inulin and para-aminohippurate sodium (PAH) when the brace was first applied as well as after four and 12 months of brace treatment. Each function test was performed without and with the brace. The glomerular filtration rate decreased when the brace was first applied, was unchanged after four months, and increased after 12 months. Renal plasma flow decreased when the brace was first applied but was unchanged after four and 12 months. Urinary sodium excretion decreased to values lower than those of control subjects when the brace was first applied, but an adaptive increase was noted after four and 12 months of brace treatment. The acute effects of brace application were observed even after four and 12 months of treatment; an increase in urinary sodium excretion was found when the brace was removed.

Adolescent↗
PubMed1982

The immediate effect of Boston brace on renal function in patients with idiopathic scoliosis.

The immediate effect of the Boston brace on renal function was studied in 18 patients with idiopathic scoliosis ranging in age from ten to 17 years. Renal function was tested by clearances of inulin and PAH without and with brace applied. Glomerular filtration rate and effective renal plasma flow decreased significantly when the brace was applied, but to values within normal limits. When the brace was applied, the urinary sodium excretion, however, was significantly reduced to values significantly lower than that of controls. This might cause sodium retention if the pressure effect of the brace persists.

Adolescent↗
PubMed1980

Bone scanning of the spine and thorax in idiopathic thoracic scoliosis.

Bone scanning of the spine and the anterior thorax was performed in 5 girls with recently diagnosed, progressive, thoracic, idiopathic scoliosis. In all patients, the scan of the spine showed a homogenous isotope uptake which was considered to suggest that, at least during the early stages of the development of the spinal deformity, there are no obvious disturbances of the metabolic activity of the affected vertebrae in idiopathic, thoracic scoliosis. On the contrary, in all patients there were differences in isotope activity between ribs on the left and right side at the costochondral area. In 4 of the patients, the higher uptake was found in the ribs on the concave side, which might indicate that the longitudinal growth of the ribs on this side was increased as compared with that of the ribs on the opposite side. Because of the restricted number of patients allowed to be included in this study, this observation could not be verified statistically and has to be considered preliminary, in need of verification as well as of further investigation.

Adolescent↗
PubMedDate not supplied

Estimation of vertebral rotation and the spinal and rib cage deformity in scoliosis by computer tomography.

Computer tomography (CT) presents a method of determining longitudinal axis vertebral rotation and vertebral, spinal, and rib case deformity. Different rotation angles, distances, and indexes are defined and discussed. Radiation risks were evaluated and considered exceedingly small when compared to the ordinary spinal anteroposterior radiograph. In a model study the mean difference between actual vertebral rotation and measured rotation was 0.3 degrees if the vertebrae were tilted up to 20 degrees in either the frontal or sagittal plane. This accuracy was lost if the vertebrae were tilted 20 degrees in both the frontal and the sagittal plane. Computer tomography can be used for evaluation of the vertebral rotation in the frontal plane.

Humans↗
PubMedDate not supplied

The longitudinal axis rotation of the apical vertebra, the vertebral, spinal, and rib cage deformity in idiopathic scoliosis studied by computer tomography.

The correlation between the lateral curve, the location and the length of the curve, and the longitudinal axis rotation of the apical vertebra has been studied in 65 patients with idiopathic scoliosis using computer-assisted tomography. This method provides the opportunity to describe the relationship between the rib hump, the longitudinal axis rotation, the lateral curve, and the kyphosis-lordosis with exceedingly small radiation doses. The vertebral rotation was found to be correlated to the lateral curve but not to the location of the length of the curve. The longitudinal axis rotation of the vertebrae is the most important factor for the development of the rib hump which is further accentuated by increased lordosis.

Adolescent↗
PubMedDate not supplied

The effect of Harrington instrumentation on the longitudinal axis rotation of the apical vertebra and on the spinal and rib-cage deformity in idiopathic scoliosis studied by computer tomography.

The effects of Harrington instrumentation on the longitudinal axis rotation of the vertebra, the kyphosis-lordosis, and the rib-cage deformity were investigated by computer tomography in 33 patients. No significant derotation was achieved. The sagittal diameter of the rib cage was reduced significantly with distraction rod instrumentation and further by additional application of a compression rod. The rib hump was reduced significantly only with distraction rod instrumentation. The obtained results indicate that despite instrumentation, the spine preserves an almost unchanged peripheral position in the rib cage.

Adolescent↗
PubMedDate not supplied

Is lateral electric surface stimulation an effective treatment for scoliosis?

Eighteen patients with scoliosis were treated with lateral electric surface stimulation (LESS). Four (23%) discontinued the program because of discomfort, five did not carry through an adequate treatment program, and nine (50%) coped with a proper program. In spite of a good initial correction, five patients in the latter group progressed during treatment. Muscle biopsy specimens before and after a treatment period of 18 months revealed a tendency for the stimulation output to spill over to the concave side of the curve. In this study, LESS has not been an effective treatment for scoliosis.

Biopsy↗
PubMedDate not supplied

Operative treatment of spondylolisthesis in children and adolescents with tight hamstrings syndrome.

Of 10 patients with spondylolisthesis of the fifth lumbar vertebra, 8 had characteristic tight hamstrings syndrome, and 4 showed a Grade IV slip. Sciatic pain was present in all cases. In 5 there were also signs of compression of the first sacral root. In 4 cases impaired pattern of walking was the first symptom. Extraperitoneal anterior interbody fusion was performed in 9 cases. Laminectomy was combined with posterior fusion in one. Posterior fusion alone was performed in another. The follow-up period ranged from 2 to 14 years. All patients were free from symptoms at the last follow-up examination and they had normal living patterns and physical activities. Fusion was obtained in every case. There were no complications in this series, except for one fatigue fracture of the neural arch of the vertebra one level above fusion, discovered at 6 months after the operation; this patient has had no symptoms in a period of time of 14 years since the operation. The above described excellent results of anterior fusion without reduction raises questions as to the necessity of extensive major surgical interventions to obtain operative reduction of the displacement in patients, even with Grade IV spondylolisthesis.

Adolescent↗