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Biomedical subjects

R Wallensten

Publications and source records attributed to R Wallensten.

24 records · Page 2Linked to original sources
PubMed1982

Total hip replacement with or without trochanteric osteotomy.

In a consecutive series of primary total hip replacements (THR) 54 patients were operated upon with and 78 patients without trochanteric osteotomy. Follow-up at least 2.5 years postoperatively failed to disclose any differences between the two groups in bleeding during operation, the incidence of early complications or the infection rate. A longer operation time was noted for the osteotomized group. Mechanical failure was more frequent in the non-osteotomized group. The clinical end result was similar in both groups. In complicated cases or when accessibility to the operation site is poor a trochanteric osteotomy is recommended.

Femur↗
PubMed1982

Rearthroplasty of the hip joint.

Forty patients were reviewed 24 to 52 months after their second, third and fourth arthroplasty of the same hip. The protocol assessed pain, range of motion, leg shortening, gait performance, radiological appearance of the endoprosthesis and included the patient's own evaluation. Results of rearthroplasty were inferior to those of primary procedure, but still good enough, both in the surgeon's and the patient's opinion, to be the method of choice for revision of a failed total hip replacement.

Activities of Daily Living↗
PubMed1981

The natural history of Legg-Calvé-Perthes disease.

Two groups of patients who had Legg-Calvé-Perthes disease were studied. The first group of patients consisted of eighty-eight patients (ninety-nine affected hips) followed in three hospitals for an average of forty years. The second group consisted of sixty-eight patients (seventy-two affected hips), all of whose radiographs from the onset of disease to maturity were available and all of whom had been treated in one hospital. The patients in this second group were followed for an average of thirty years. Each hip in both study groups could be placed into one of five classes of deformity based on its radiographic appearance at maturity. Each class showed a characteristic pattern of involvement during the active stages of the disease and had a specific long-term clinical and radiographic course. The clinical and radiographic course of an involved hip subsequent to childhood was related to the type of congruency that existed between the femoral head and acetabulum. Three types of congruency were recognized: (1) spherical congruency (Class-I and II hips) - in hips in this category arthritis does not develop; (2) aspherical congruency (Class-III and IV hips) - mild to moderate arthritis develops in late adulthood in these hips; and (3) aspherical incongruency (Class-V hips) - severe arthritis develops before the age of fifty years in these hips.

Adolescent↗
PubMed1980

Post-reduction avascular necrosis in congenital dislocation of the hip.

Twenty-five patients with thirty congenitally dislocated hips in which avascular necrosis developed after closed reduction were followed for an average of thirty-nine years from the time of reduction. Twenty-four of the thirty hips had moderate or severe osteoarthritis and twenty-two of the twenty-five patients had significant pain or loss of function, or both, by the time they were forty-two years old, The deformities produced by avascular necrosis that were related to osteoarthritis included: (1) loss of sphericity of the femoral head, (2) persistent lateral and proximal subluxation, (3) irregularity of the medial part of the femoral head, and (4) acetabular dysplasia. The study suggests that if avascular necrosis develops following closed reduction of a congenitally dislocated hip, attempts should be made to prevent lateral and proximal subluxation of the femoral head and to correct thse abnormalities, if possible, once they occur.

Adolescent↗
PubMedDate not supplied

MR imaging of syringohydromyelia and Chiari malformations in myelomeningocele patients with scoliosis.

The brain and spinal cord were examined with MR imaging in 30 myelomeningocele patients 3-32 years old to study the prevalence of syringohydromyelia and Chiari malformations and to correlate these conditions with developmental scoliosis and spontaneously arrested hydrocephalus. Twelve patients had neurologic deficits above the level of the myelomeningocele and 10 had spontaneously arrested hydrocephalus. MR visualized syringohydromyelia in four patients with widened or focally bulging spinal cords and in eight patients with atrophic spinal cords. All patients had Chiari malformations, 28 of type II and two of type I. Syringohydromyelia was not correlated with type of scoliosis, result of ventriculoperitoneal shunting procedures, radiologic level of the myelomeningocele, or extent of the Chiari malformation. The two patients with the most rapid progression of thoracic scoliosis had the most extensive syringohydromyelia and radiologically low lumbar levels. Neurologic deterioration due to syringohydromyelia and Chiari malformations is probably more common in myelomeningocele than has been recognized previously and may cause developmental scoliosis, loss of ambulation, impaired extremity function, and progressive cranial nerve paralysis.

Adolescent↗