著者

宇田 宙照 福島 充也 後藤 康夫 池田 均 塚西 茂昭 信原 克哉

出版者

日本肩関節学会

雑誌

肩関節 (ISSN:09104461)

巻号頁・発行日

vol.13, no.1, pp.11-15, 1989-11-01 (Released:2012-11-20)

参考文献数

3

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The clavicular movement during active elevation of the upper limb was analyzed in this study. Sixty right shoulders in normal sugjects were investigated by using “ Chneradiography” and the “ personal image analysis system”. The lateral lower margin and the conoid tubercle of the clavicle were measured as the points which demonstrate clavicular movement.During elevation of the upper limb in the scapular plane, the elevated ang l e s of the clavicle were calculated with the scapular movement in the following stages; “ setting phase”, the “ hanging joint” prase, “ transit zone”, and the “ joint needing support” phase.The results were as follows:1. The elevated angles of the clavicle increased gradually during elevation of the upper limb. Finally the average of maximum elevated angles of the clavicle was 41.5 degrees at 150degrees of the arm-trunk angle. We noticed the clavicular movement for every 10 degrees was uneven in this study.2. No remarkab l e elevation was noted in the “ setting phase”. The elevated angles of the clavicle reached 4.22 degrees during the setting phase. Clavicular movement is similar to scapular movement, however, it was slightly irregular and unstable.3. In the “ hanging joint” phase, the elevated angle of the clavicle was 3.69 degrees forevery 10 degrees.4. In “ transit zone”, the elevated angle of the clavicle was 4.02 degrees for every 10degrees. The ratio of clavicular movement was closest to the scapular movement in this phase. And this movement was the most characteristic.5. In the final stage, in the “ joint needing support” phase, the elevated angle of the clavicle increased 4.22 degrees of the elevation of the upper limb.6. The absolute relationship between scapular and clavicu l a r movements were obtained from these results.

著者

橋本 卓 金谷 整亮 池田 均 塚西 茂昭 信原 克哉 田中 道夫

出版者

日本肩関節学会

雑誌

肩関節 (ISSN:09104461)

巻号頁・発行日

vol.14, no.2, pp.245-248, 1990-09-01 (Released:2012-11-20)

参考文献数

4

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We have measured the intra-articular pressure simultaneously with arthrography of the shoulder. In this study, changes in the intra-articular pressure were examined in unstable shoudlers associated with loose shoulder, rotator interval lesion, and traumatic recurrent anterior dislocaiton.Of the 731 shoulders (731 patients) in which intra-articular pressure was me a sured from 1981, the measurement was possible in 254 shoulders (254 patients). A total of 91 shoulders, consisting of 20shoulders with traumatic recurrent anterior dislocation,40 loose shoulders, and 31 shoulders with rotator interval lesion, were evaluated.Physiologic saline was in f used into the joint, and canges in the intra-articular pressure were recorded as electric signals through a transducer. The arm was moved up and down passively, and the pressure was measured at intervals of 10.In loose shoulder and rotator interval l e sion, the intra-articular pressure decreased as the arm was lifted higher, but the decreases were smaller than in normal shoulders. In these groups, there was a smaller pressure increase to the position of maximum uplift with a smaller peak value and within a narrower range than in the normal group. These findings were more notable in the shoulders with an FSH angle of 81' or greater. These results suggest that the intra-articular pressure reflects the joint capacity.In traumatic recurrent anterior dislocation, however, the decrease in the pressure in an early stage of arm lifting was the greatest among all groups including the normal group, and the pressure increase with arm lifting was gentler in shoulders with an FSH of 80 °or less, unlike in the other two groups.The changes in the intra-articular pressure in shoulders with traumatic recurrent anterior dislocation may be explained by disruption of the anterior capsular mechanism and muscle contraction due to anxiety over the possibility of dislocaiton during arm lifting as well as the looseness of the articular capsule.