The knee arthrography is a rather simple, not operative procedure and frequently helpful to the orthopedic surgeon. Although arthrography of the knee was .first performed near the turn of the century, it has not yet to gain acceptance and pop, ularity of other radiographic contrast study in this countary.
Since 1967, author have performed 182 knee arthrograms in 176 patients of internal derangements of the knee. The 182 knees of the 176 patients had surgical operations on knees and the diagnosis was confirmed surgically.
The patients were from 17 year to 46 year of the age and 147 males, 29 females in sex distributions.
Author, used about 50~ 90 ml. of air as contrast in pneumoarthrography and 15 ^r 20m1. of 60% urografin (or Conray 400) in single positive contrast arthrography in knees. For double contrast knee arthrography author used 9-v 15ml. of 60% urografin(or Conray 400) and 50-´90m1. of air as contrast material.
The 182 total knee arthrographies were composed of 28 pneumoarthrographies, 99, single positive contrast arthrographies and 55 double contrast arthrographies. The, total 182 knees in 176 patients were operated and the diagnosis was confirmed surgically. And comparing with arthrography was performed.
The meniscus tears were noted in 114 knees and ligaments tears were in 76 knees. in surgical diagnosis. There were 3 Baker´s cyst and one intercondyle emminence-. fracture. So 18 knees had double lesions at least. The medial meniscus tears were 38 knees and lateral side were 76 knees. Higher incidence of meniscus tears in lateral side is characteristic in my study, compared to Westerns where usuallyhigher incidence in medial side of the meniscus.
There were totally 10 false negative and 6 false positive interpretations of thee arthrography in 120 meniscus tears after menisectomy. So the error was 13.37o in meniscus tear, and the accuracy of the arthrography in meniscus tear was 86.7% totally. The accuracy in medial meniscus tears was 92.3% and in lateral meniscus: tears was 84. 0Much difficulty and trouble-some were noted in lateral meniscus.. lesion´s interpretations. The accuracy was highest in double contrast knee arthrography(89.7%) and lowest in pneumoarthrography(78%) in meniscus lesions detections. The accuracy of the single positive knee arthrography in meniscus lesions. was 88.67o. The most ferquent type of meniscus tear wes oblique type (36.7%). The medial collateral ligaments took tears most frequently. There were no´signific ant complications or side reactions during this study, except slight pain and fulling sense. The knee arthrography can be used as screening test for internal derangem ents of the knee in Korea.
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