165Dy Hydroxide Macroaggregates(165Dy HMA) has a short half life(2.3 hours) and a size range of 3-5µm that give the advantage of reduced leakage and a shorter hospital stay. This report will show the results of a prospective open study on the efficacy and safety of 165Dy HMA in 178 knees of 141 patients with chronic synovitis refractory to conventional antirheumatic therapy. The final global assessment was classified as good, fair or poor. Extra-articular leakage of 165Dy HMA was determined by the scintigraphic evaluation of liver, groin and knee joints. The optimum radiation dose was 250 mCi. The mean follow up periods were 32.4(14-112) weeks. Thirty seven percent of the knees showed good results, 48% fair results and 15% poor results. In the knees with stage I radiographic changes, 82% showed improvement including 32% of the patients with good results. In the knees with stage II radiographic changes, 90% showed improvement including 42% of the patients with good results. The mean period of improvement for the 158 knees that responded to treatment was 41.4(24-106) weeks. Leakage of radioactivity from the injected joint was minimal. Adverse reactions were rare(radiation burn : 4 cases, transient postinjection swelling : 14 cases). In conclusion, 165Dy HMA radiation synovectomy is a safe and useful therapy for chromic synovitis of the rheumatoid knees.
Arthritis, Rheumatoid ; Burns ; Follow-Up Studies ; Groin ; Humans ; Injections, Intra-Articular ; Joints ; Knee Joint ; Knee ; Length of Stay ; Liver ; Prospective Studies ; Radioactivity ; Synovitis

OBJECTIVES: In this study, we performed a preliminary investigation for establishing guidelines for the usage of smartphones in children and adolescents. METHODS: From March 2014 to August 2014, 182 board-certified psychiatrists were asked to participate in the survey ; 121 participants completed the questionnaire. The questionnaire was developed by the authors, mainly the Public Relations Committee of the Korean Academy of Child and Adolescent Psychiatry. It evaluates psychiatrists' opinions on the use of smartphones in children and adolescents. In addition, psychiatrists' attitudes towards their own usage of smartphones were assessed in order to determine the impact on their opinion towards the children's usage. RESULTS: Psychiatrists have recommended various opinions as the appropriate age to own a smartphone for the first time. Mean age recommended by psychiatrists is grade 7.7. One-hundred participants (82.6%) agreed to the age limit to own a smartphone for the first time. In addition all participants agreed to the necessity of a time limit in children and adolescents. Psychiatrists (17.4%) who disagree on the age limit in children considered the smartphone more useful by themselves compared to psychiatrists who agreed on the age limit. CONCLUSION: Most psychiatrists have recommended that an appropriate limit for smartphone usage in children and adolescents is needed.
Adolescent Psychiatry ; Adolescent* ; Cellular Phone ; Child* ; Humans ; Psychiatry* ; Public Relations