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Biomedical subjects

I Haslock

Publications and source records attributed to I Haslock.

At least 55 records · Page 3Linked to original sources
PubMed1984

Measurement of stiffness in the metacarpophalangeal joint: circadian variation.

A finger arthrograph has been used to investigate circadian variation of stiffness in the metacarpophalangeal joints of normal subjects. A marked increase in the resistive torques of male and female joints was noted during the early hours of the morning (typically 2 to 3 times the torque found during the afternoon). The amount of energy dissipated by the joint and associated soft tissues also showed a circadian variation, with the highest levels of energy dissipation again occurring during the early hours of the morning (0200-0400).

Circadian Rhythm↗
PubMed1983

Acute knee joint rupture--a report of two unusual cases.

An acute rupture of the knee joint is a well recognized and documented condition. The symptoms and signs it produces have been described as the pseudothrombophlebitis syndrome and its importance in the differential diagnosis of calf pain is being increasingly recognized. We report two cases where the symptomatology has been unusual and stress the need for considering this condition in other atypical cases of leg pain which may not strictly conform in presentation to the pseudothrombophlebitis syndrome.

Acute Disease↗
PubMed1982

Measurement of stiffness in the metacarpophalangeal joint: the arthrograph.

A new type of finger arthrograph is described that evaluates the stiffness parameters of the metacarpophalangeal joint of the index finger at 10 degrees increments of flexion and extension. Stiffness is evaluated in terms of the energy loss per cycle (of amplitude 4 degrees), at every 10 degrees interval from 4 degrees to 94 degrees of flexion and by the mid-position torque and the mean slope of the least-squares fitted line through the graph of resistive torque against angular displacement. The instrument is simple to use, quick and comfortable for the patient, and gives reproducible results.

Equipment and Supplies↗
PubMed1982

Trochanteric bursitis--a frequent cause of 'hip' pain in rheumatoid arthritis.

One hundred consecutive patients with rheumatoid arthritis (RA) were examined for the presence of trochanteric bursitis. This condition was found in 15. Ten patients responded to a single local injection of corticosteroid and the remaining 5 to a second injection. Trochanteric bursitis is an underdiagnosed, easily remediable cause of pain in RA. Specific examination for in presence should be a routine in all patients with RA, especially those with hip pain.

Arthritis, Rheumatoid↗
PubMed1981

Stiffness in the metacarpo-phalangeal joints of young adults.

A simple design of arthrograph is described and used to study the stiffness of the metacarpo-phalangeal joints of 55 subjects between the ages of 18 and 25. The apparatus and experimental technique produced results which were repeatable to within four percent. Results obtained when the tests were conducted at different angles of flexion showed that the direction of approach to the angle of flexion was important. For example, if the same angular position were approached first from a greater angle of flexion and then from a smaller angle of flexion, the resulting measured resistive torques were different. However, the two different values were repeatable and not dependent on the order of testing. Stress relaxation of the soft tissues surrounding the joint was observed while the variation in the equilibrium position (resting angle of flexion) was seen to be from 16 to 44 deg (mean 33.2). Stiffness was strongly correlated with subject mass and weakly correlated with wrist circumference. Women exhibited lower joint stiffness than mean but some of this difference may be due to their lower body mass.

Adolescent↗
PubMed1981

Coexistent rheumatoid arthritis and tophaceous gout: a case report.

Rheumatoid arthritis and gout are both common rheumatic diseases, but their coincidence is rare. We report the case of a 67-year-old Caucasian woman with rheumatoid arthritis who later developed tophaceous gout. The tophi disappeared with remarkable rapidity on treatment with allopurinol.

Aged↗
PubMed1980

Human joint performance and the roughness of articular cartilage.

It is known that the surface of articular cartilage is rough and it has been suggested that this is likely to affect the lubrication of human joints. This paper describes the direct measurement of a cartilage surface with a stylus instrument. It is found that the height distribution is Gaussian with an inverse-square power spectrum. It is thus possible to calculate the elastic deflection of the surface under normal walking loads and it is shown that the mean separation of the cartilage surfaces in a human joint varies rather slowly with load. In one particular hip joint at heel strike the real area of contact was calculated to be about 1.3 cm2, the mean gap to be about 60 micrometers and the trapped volume to be about 80 percent of that when standing.

Adult↗