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Biomedical subjects

S G Hunter

Publications and source records attributed to S G Hunter.

6 recordsLinked to original sources
PubMed1982

The migration of femoral Küntscher nails: a clinical study.

The incidence of migration of nails has been shown to be far higher than previously suspected. Its development is influenced by a combination of the characteristics of the fracture, the extent of nail-cortex fixation and when the patient walks. Attempts to protect the fracture site by mobilization in a weight-relieving caliper do not reduce the incidence or extent of migration. The cause of its development appears to be mechanical, resulting from stresses applied to the nail on moving the limb, particularly if weight is being borne. To reduce migration, fixation should be obtained with as large a nail as possible inserted with elastic deformation.

Adolescent↗
PubMed1982

The closed treatment of fractures of the humeral shaft.

In 60 angulated fractures of the humeral shaft, the 'U' slab acted as a dynamic splint to reduce the deformity without causing distraction and delayed union. The reduction occurred as effectively as manipulation under anesthesia. The forces acting with the slab produced minor varus deformity, but this affected neither the cosmetic nor functional results. Functional recovery was relatively rapid in patients younger than 35 years of age. The fracture was associated with a high overall complication rate related to the severity of the causal trauma. Radial nerve palsy was the most common complication and when present, was noted at initial examination. Radial palsy was associated with severe trauma, producing fractures around the lower third of the shaft, and recovered spontaneously. In no instance did palsy result from the treatment. The 'U' slab method is simple, effective, without significant complications, and has the advantage of being applicable when general anesthesia is contraindicated.

Adolescent↗
PubMed1982

Component alignment and trochanteric detachment in total hip arthroplasty.

The relationship between the type and alignment of the prosthetic components and detachment of the greater trochanter in a series of Charnley total hip replacements was investigated. Detachment occurred with increased frequency if the femoral component was positioned in valgus or the cup low in the acetabulum. Whether two or three wires were used to reattach the trochanter did not affect the incidence of detachment. Detachment was unrelated to the patients' weight. Surgical inexperience and a persistent postoperative limp, often effected by joints other than the replaced hip, predisposed to detachment. Detachment is produced by distractive forces arising from the abductor mechanism, acting through the trochanter across the wire fixation. These forces can be reduced by neutral positioning of the femoral stem with the lower pole of the cup 5 mms above the tear-drop.

Aged↗
PubMedDate not supplied

Deformation of femoral intramedullary nails. A clinical study.

Deformation of femoral intramedullary nails is a common complication, occurring in 78% of fractures. Presenting as curvature or angulation, deformation is attributable to either elastic or plastic bending of the nail at the time of introduction of the nail. Generally, deformation is not associated with clinical complications. Angulation can be plastic deformation associated with delayed fracture union, and is induced by weight-bearing on fractures with cortical weakness (comminution or deficiency), especially if the nail is of small diameter. Malunion, also associated with angulation, was not a clinical problem, because the maximum displacement was only 10 degrees. Theoretically, larger displacement are possible. Attempts to prevent angulation by protecting the limb in a weight-relieving caliper were unsuccessful. The best method of prevention is a careful selection of patients to avoid nailing those comminuted fractures in which angulation is likely to occur. If angulation occurs, it may be a prognostic sign of delayed union.

Adolescent↗