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Biomedical subjects

S H Norris

Publications and source records attributed to S H Norris.

At least 37 records · Page 2Linked to original sources
PubMed1989

Quiz of the month.

Explore the source record for details and available documents.

Acid-Base Imbalance↗
PubMed1989

The blood supply of the calcaneal tendon.

The microvascular anatomy of the calcaneal tendon was investigated in cadaver tendons by injection of barium sulphate and indian ink and a quantitative study of intratendinous blood supply was made, using a computer-assisted image analysis system. There was a reduction in both the number and the mean relative area of vessels in the mid-section of the tendon. This area of reduced vascularity may be of significance in the pathogenesis of rupture.

Achilles Tendon↗
PubMed1988

Recovery following fractures of the clavicle treated conservatively.

A consecutive series of 140 patients with fractures of the clavicle were reviewed a minimum of 3 months after their injury. All had been treated conservatively using either a figure-of-eight bandage or broad arm sling. No statistical difference was found in the speed of recovery P greater than 0.05 when these two methods of treatment were compared in patients matched for sex and age. The patient's age at the time of the injury, however, did affect recovery with 33 per cent of those over the age of 20 years still having symptoms 3 months after they had sustained their fracture. Although lateral third fractures occurred more commonly in this age group than in the younger patients, the site of fracture did not adversely affect the speed of recovery P greater than 0.05.

Adolescent↗
PubMed1988

Mallet finger: a trial of two splints.

Over a period of twelve months, 116 cases of mallet finger were allocated randomly to treatment with either a Stack or Abouna splint. The two splints were equally effective, producing a cure or a significant improvement in approximately 50% of cases. However, the Stack splint was much preferred by the patients, who found it more comfortable, more robust and easier to keep clean.

Adult↗
PubMed1988

The microvascular anatomy of the distal digital extensor tendon.

The circulation of six hands from four human cadavers was washed out, the hand then being injected with contrast material to provide 24 fingers for analysis under the dissecting and light microscopes. The microvascular anatomy of the distal part of the extensor tendon was outlined and is described, with particular emphasis on the fine vessels within the tendon and on the tendon surface. An area of deficient blood supply was shown within the tendon which may have implications in the aetiology and treatment of mallet finger.

Cadaver↗
PubMed1988

The mechanism of clavicular fracture. A clinical and biomechanical analysis.

A consecutive series of 150 patients with clavicular fractures is presented. In 81% detailed information regarding the mechanism of the injury was available and, of these, 94% had fractured their clavicle from a direct blow on the shoulder; only 6% had fallen on the outstretched hand. This finding, at variance with commonly held views regarding the mechanism of this injury, was further investigated by biomechanical analysis of the forces involved in clavicular fractures. The biomechanical model supported the clinical findings.

Biomechanical Phenomena↗
PubMed1988

The pathogenesis and treatment of rheumatoid wrist and hand deformities.

As rheumatoid arthritis progresses, pannus formation causes subchondral bone damage and later cartilage and bone destruction. Stretching of ligaments due to capsular distension causes joint instability, and infiltration. These processes are frequently responsible for deterioration in hand function. However, present surgical treatments of wrist and hand deformities allow a degree of independence.

Arthritis, Rheumatoid↗
PubMed1988

Serum myoglobin following tourniquet release under anaesthesia.

Serum myoglobin concentrations were studied in 34 patients during tendon and nerve reconstruction operations that required the application of a pneumatic limb tourniquet. Seventeen patients received general anaesthesia without the use of suxamethonium, while the remaining 17 were given suxamethonium as part of the anaesthetic technique. Tourniquet times of up to 2.5 h were associated with negligible myoglobin release, but the use of suxamethonium administration resulted in a rise of serum myoglobin in some subjects, reaching a maximum of 300 micrograms litre-1 20-40 min after induction. No rise in serum myoglobin occurred in any patient following deflation of the tourniquet. Three of the four patients who required a re-application of the tourniquet (after a short reperfusion time) had rises of serum myoglobin up to 120 micrograms litre-1 following the second deflation. Pneumatic tourniquets appear to cause no detectable ischaemic damage for up to 2.5 h, with or without prior use of suxamethonium. Re-application after only a short period of reperfusion may be inadvisable.

Adolescent↗
PubMed1986

A prospective trial comparing operative and manipulative treatment of ankle fractures.

A series of 42 ankle fractures have been randomised into two groups respectively undergoing either open reduction and internal fixation or manipulative reduction and plaster. Their progress after removal of all external splintage has been followed using simple gait analysis techniques. There appears to be no difference in the outcome of treatment of the two groups in the early recovery period (up to 20 weeks).

Adolescent↗