Muscle strength of knee joint in hemophiliacs.

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In hemophilia, treatment is well developed owing to injection of coagulative facters and the approval of self-injection. But after repeated intra-articular bleeding, hemophilic arthropathy is progressed. Aspect of rehabilitation, hemophilic arthropathy is an important problem because that is restricted their ADL. In this paper, the relationships of muscle strength, range of motion and X-ray findings in knee joints were inspected.Materials)The average age of the patients was 24.5years 17y-39y. All were males and had a deficiency of a facter level of less that 1 per cent, the other three patients had a facter VIII level of between 2 and 10 per cent. In ADL, all were independent, only one was using crutches.Healthy 17 patients were used as a controls. All were male and the average age was 27.9 years (21y.-38y.).Methods)By the Arnold-Hilgartners roentgenographic method, hemophilic arthropathy was categorized into five stages and evaluated in terms of range of motion. Hemophilic patients were tested with a Cybex II isokinetic dynamometer and measured peak torques generated by knee extensors and flexors.Results)1. Many patients had troubles in knee joints.2. Range of motion was well kept until stage II.3. Muscle strength was already weakened in stage II. (Stage II is earlier stage and the joint space is well kept.)4. Compared with flexors, peak torques of extensors was remarkabley weakened in every stage.
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