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Biomedical subjects

M Rang

Publications and source records attributed to M Rang.

At least 37 records · Page 2Linked to original sources
PubMed1986

An osteoid osteoma in an open distal femoral epiphysis. A case report.

An osteoid osteoma occurred in the distal femoral epiphysis of an 11-year-old boy. Only eight other cases of this tumor in an open epiphysis have been reported. An image intensifier was used to place the tip of a wire in the center lesion. Removal through a small incision with a bone trephine placed over a guiding Kirschner wire was curative. Bone peripheral to the lesion was replaced, allowing early mobilization without support.

Child↗
PubMed1986

Limb swelling after release of a tourniquet.

Using a water displacement method the authors found that an exsanguinated human limb will swell immediately by approximately 10% of its original volume after release of a pneumatic tourniquet. Exsanguination reduces limb volume by forcing blood from it. Approximately one-half of the post-tourniquet swelling is due to the return of the exsanguinated blood volume to the limb. Reactive hyperemia accounts for the remainder of the swelling the authors measured. Subsequently, additional swelling can occur from both hematoma formation and the accumulation of postanoxic edema fluid. In some cases, the placement of a circumferential postoperative plaster on a limb prior to tourniquet release may be a hazardous procedure.

Casts, Surgical↗
PubMed1985

The myth of muscle balance. A study of relative strengths and excursions of normal muscles about the foot and ankle.

The lower limbs of five cadavers were dissected and the lengths of the muscle fibres and the weights of all the muscles below the knee were measured. From this information the relative strength and excursion of each muscle was determined. We found that the plantarflexors of the ankle were six times as strong as the dorsiflexors. We have therefore discarded the concept of "muscle balance" in tendon transfer surgery and propose that task appropriateness should be the guide. The constant relationship between muscle fibre length and muscle excursion means that contractures are accompanied by decreased excursion. Tendon lengthening improves deformity but does not improve the decreased active range of movement.

Adult↗
PubMed1984

Femoral intramedullary nailing in the growing child.

The outcome of intramedullary nailing in 17 femoral fractures was studied in children aged 5 to 12 years. By this age independent vascularity of the capital femoral epiphysis has become established. Indications were: severely displaced diaphyseal fractures uncontrolled by closed reduction in patients with head injury or multiple trauma. All were treated by open reduction and retrograde nailing using Rush pins or Kuntscher nails. All children became community ambulators and were followed until maturity. There were no significant rotational deformities and leg length discrepancy due to overgrowth was less than 1.0 cm at termination of growth. Growth arrest of the greater trochanter was seen in three hips that were reamed for Kuntscher nailing but in none of those fixed with Rush pins. Retrograde Rush pinning appears to be a safe and effective procedure that avoids insult to the proximal femoral blood supply. Growth plate changes did not significantly affect hip function.

Bone Nails↗
PubMed1984

Medial dislocation of the radial head following breech delivery: a case report and review of the literature.

A case is reported of an isolated radial head dislocation following breech delivery. A search of the literature revealed only one other reported case following difficult delivery, which raises questions as to the mechanism of injury producing this lesion. Although a rare condition, dislocation of the radial head following difficult delivery can result in permanent elbow deformity.

Birth Injuries↗
PubMed1984

Muscle growth in normal and spastic mice.

Longitudinal muscle growth was studied in normal and spastic mice. Muscle growth takes place at the musculotendinous junction--the 'muscle growth-plate'. In spastic mice muscle growth is reduced by 45 per cent, resulting in contractures.

Animals↗
PubMed1984

Correction of the malunited forearm fracture.

Malunion of a child's forearm fracture is a functional and cosmetic disability. Drill osteoclasis is an alternative to open osteotomy. Fifteen consecutive cases demonstrate the following advantages of the technique: (1) the absence of an unsightly scar, (2) full, reliable correction of the deformity, (3) no need for a second operation to remove a plate, and (4) no risk of fracture occurring subsequently through a screw hole.

Bone and Bones↗
PubMed1984

Pin placement in slipped capital femoral epiphysis.

Standard radiographs taken at right angles to each other during the pinning of a slipped capital femoral epiphysis may not demonstrate pins protruding into the joint. In this study roentgenograms of 110 patients (148 hips) with slipped capital femoral epiphyses were analysed by a three-dimensional mathematical model of the femoral head and pin position. A computer was used to determine the spatial distance between the tip of the pin and the subchondral bone of the femoral head. Pin protrusion was found in 41 hips. In 22, protrusion was sufficient to have transgressed the joint space. Pin protrusion did not, however, appear to increase the risk of chondrolysis.

Adolescent↗
PubMed1983

Paraplegia in osteogenesis imperfecta. A case report.

Paraplegia occurred in an adolescent girl with osteogenesis imperfecta after chiropractic manipulation. The child had been able to walk freely out of doors. Complete motor paralysis with sensory sparing resulted due to anterior compression of the cord by spondyloptotic cervical vertebrae. Reconstructed computerised tomography was very helpful in demonstrating the abnormality. Anterior and then posterior decompression relieved the tethered spinal cord and were supplemented with bone grafting. Early diagnosis and surgical treatment will prevent similar neurological accidents.

Child↗
PubMed1983

Treatment of femoral fracture in the child with head injury.

The outcome of various types of treatment for femoral fracture in children with head injury was studied retrospectively in 51 patients with 56 fractures. Of these, 36 patients (71 per cent) were in deep coma and scored 5 to 7 on the Glasgow scale. Forty-three children (84 per cent) were eventually able to walk freely. Open reduction and internal fixation proved an attractive solution for femoral fractures in children with head injury who could tolerate general anaesthesia: intramedullary nailing was safe and gave satisfactory results in 16 fractures but infection complicated three of the five fractures which were plated.

Bone Plates↗
PubMed1982

Dislocation of the hip in trisomy 21.

Almost one child in twenty with trisomy 21 will develop spontaneous dislocation of the hip between learning to walk and the age of 10 years. After the age of two years spontaneous habitual dislocation may occur. If left untreated, acute dislocation, subluxation and fixed dislocation follow in sequence. The natural history of the condition is described and the clinical and radiological features of 45 dislocations in 28 patients are presented. Nineteen had received no treatment. The most effective treatment was found to be pelvic or femoral osteotomy, combined with capsular plication, carried out in the phase of habitual dislocation. Once subluxation or fixed dislocation was present, the results of operation were poor and it is not recommended. All patients, even if left untreated, remain mobile. Pain is not a prominent feature.

Adolescent↗
PubMed1981

Seating for children with cerebral palsy.

Special seating enables children with even the most severe forms of cerebral palsy to sit comfortably. A straight spine and mobile hips are desirable. Prevention of hip dislocation by operation, or release of a hip extension contracture, is required for 40% of the younger children. Surgical correction of scoliosis is required for 20% of the older ones. Seating problems may be classified by (a) ability--hands free, hand dependent or propped--(b) the pattern of deformity--symmetrically slouched or windswept--and (c) severity of deformity--none, amenable to surgery, or beyond surgery. Each of these categories requires a different therapeutic approach.

Abnormalities, Multiple↗
PubMed1979

Erythromelalgia.

Erythromelalgia is an extraordinary disorder of unknown etiology and pathophysiology that resembles the post-traumatic reflex dystrophy syndromes but has not been described previously in the orthopedic literature. Its distinctive triad of intense burning extremity pain associated with erythema and increased skin temperature are diagnostic. Primary or idiopathic and a secondary or associated form have been identified. The latter occurs in association with an underlying disease process, especially myeloproliferative disorders. Treatment with pharmacologic agents and surgery are ineffective except in the secondary group where treatment of the associated disorder generally results in a remission. Symptoms in the primary group can be minimized by appropriate environmental control with cooling and avoiding heat-producing situations that would raise skin temperature above a critical thermal threshold.

Adolescent↗
PubMed1978

Congenital calcifying hamartoma. A resolving lesion producing gastrocnemius contracture--report of a case.

An 18-month-boy developed a calcifying mass in the gastrocnemius muscle. The lesion presented on the day of birth and resolved completely within 5 months leaving only a fibrous cord replacing the medial head of the gastrocnemius. There were no facts in the history to suggest the etiology of this lesion. Calcification of a vascular hamartoma with subsequent fibrosis is proposed as a possible explanation. The benign course of this lesion is evidence of the value of conservative treatment.

Calcinosis↗