Biomedical subjects

R T Loder

Publications and source records attributed to R T Loder.

76 records · Page 5Linked to original sources

PubMedDate not supplied

Telescoping intramedullary rodding with Bailey-Dubow nails for recurrent pathologic fractures in children without osteogenesis imperfecta.

We reviewed four children with multiple, recurrent, pathologic fractures caused by bone disease, excluding osteogenesis imperfecta, and in whom multiple osteotomies with telescoping intramedullary stabilization had been performed. The diagnoses were myelomeningocele in two children and Rett syndrome and fibrous dysplasia in one child each. Five long bones were stabilized; four femora and one tibia. The average age at surgery was 6 years 6 months; the average number of fractures that had occurred in the involved bone before surgery was 3.0 per bone. At an average follow-up of 2 years 4 months, the average number of fractures that had occurred after surgery in the stabilized bones was 0.2 per bone. There were no infections, nonunions, or rod complications. We believe that in the carefully selected patient, multiple osteotomies with intramedullary telescoping rod stabilization can be quite successful in solving the problem of recurrent fractures in children with diseases other than osteogenesis imperfecta.

Bone Nails↗

PubMedDate not supplied

Muscle and tendon size relationships in a paralyzed chick embryo model of clubfoot.

Clubfoot is a birth defect that may be related to muscle weakness or imbalance. The purpose of this study was to examine the relationships among muscle and tendon size and embryonic motility in a paralyzed chick embryo model of clubfoot and arthrogryposis. Decamethonium bromide, a neuromuscular blocking agent, was administered to a series of embryos in five dosage groups, producing a cohort of embryos with various degrees of paralysis and atrophy of tendons and muscle. Embryonic movement frequency was monitored, and after death in late gestation, the cross-sectional areas of the calf musculature and the gastrocnemius tendon proximal to the ankle were measured histologically. Significant correlations were found between embryonic motility and both muscle (r2 = 0.52) and tendon (r2 = 0.77) areas. In addition, a significant correlation (r2 = 0.74) was found between muscle and tendon areas, suggesting that a measurement of one may be used to predict the other.

Animals↗

PubMedDate not supplied

The predictive value of computed tomography in the treatment of developmental dysplasia of the hip.

The use of computed tomography (CT) to confirm femoral head position after closed reduction and spica cast immobilization in the treatment of developmental dysplasia of the hip (DDH) has become a common practice. We retrospectively reviewed postreduction CT scans of 38 children younger than 24 months of age with unilateral DDH to determine whether they could predict acetabular remodeling potential. The measurements analyzed from the postreduction CT scans were the acetabular index, axial acetabular index, anterior and posterior acetabular angles, acetabular anteversion, and axial reduction index; the standard acetabular index was measured from the plain radiographs. The average age at reduction was 11 months and at follow-up was 61 months. No angle measured on the postreduction CT scan was found to be predictive of acetabular remodeling.

Casts, Surgical↗

PubMedDate not supplied

Nuchal cord changes in children with os odontoideum: evidence for associated trauma.

We describe nuchal cord changes in four children with os odontoideum who had cervical spine magnetic resonance imaging (MRI) before surgery. In these four children, nuchal cord changes consistent with previous trauma were seen. The presence of the nuchal cord changes supports the concept of trauma as an etiologic factor in these four cases. This study supports trauma as an associated factor in patients with os odontoideum.

Adolescent↗