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임현호,Shuhua Li,안규대,우광숙,김경희,김정만,김무현,한진영 대한진단검사의학회 2018 Annals of Laboratory Medicine Vol.38 No.5
Background: Clopidogrel is one of the most commonly used anti-platelet agents in cardiovascular diseases. We analyzed the relationship between the platelet function analyzer (PFA)-200 P2Y (INNOVANCE PFA-200 System, Siemens Healthcare, Germany) results and occurrence of major adverse cardiac events (MACEs) in Korean patients with recent-onset acute coronary syndrome (ACS) taking clopidogrel. Methods: Between August 2013 and June 2016, we prospectively enrolled 106 patients with recent-onset ACS who had been treated with clopidogrel. We obtained blood samples and measured closure time (CT) using the PFA-200 P2Y test. Patients were divided into two groups on the basis of a CT cut-off value of 106 seconds. We compared patient characteristics and various MACEs that occurred during the follow-up period. Results: The CTs for 78 patients exceeded the cut-off value. At the time of these analyses, 11 patients had been diagnosed with MACEs. In the time-to-event analysis, there was a difference between the two groups (P<0.001). After adjusting other variables associated with MACE occurrence, CT value was the strongest predictor of MACEs, with a 7.30-fold occurrence risk (P=0.002). Conclusions: We found a strong relationship between CT and MACE risk in Korean patients with recent-onset ACS taking clopidogrel. Accordingly, PFA-200 P2Y results could be used as a predictive marker for MACE risk in such patients.
기니픽 中耳腔內 Propylene Glycol 注入後 中耳粘莫의 病理組織學的 變化 및 眞珠腫 形成에 關한 實驗的 硏究
任賢鎬,柳洪均 고려대학교 의과대학 1990 고려대 의대 잡지 Vol.27 No.3
The etiology and pathogenesis of cholesteatoma remain controversial, although many otologic researchers have studied cholesteatoma throughout the century. Many studies to produce experimental cholesteatoma have been attempted such as instillation of various irritants, ligation of external auditory canal and obstruction of eustachian tube. Propylene glycol which is used as a solvent in many topical ear preparations was known to cause inner ear toxlc effect and inflammatory changes of the middle ear mucosa, and moreover, some of the recent reports represented that it can produce cholesteatoma in experimental animal. The author performed histopathological study of middle ear mucosa and cholesteatoma induction after instillation of high concentrated propylene glycol in guinea pig middle ear. The obtained results were as follows : 1. Mild to severe inflammatory changes of middle ear mucosa were seen in all experiments after instillation of 50% and 95% propylene glycol such as inflammatory cell infiltration, formation of granulation tissue and bone destruction. 2. PAS-Alcian blue positive mucus secreting cells were appeared in middle ear mucosa 1 week and 2 weeks after instillation of propylene glycol and decreased in number 3 week and 6 week specimen. 3. Cholesteatoma or pearl of keratinized epithelium were seen in 3 of 14 ears in 3 week specimen and 5 of 14 ears in 6 week specimen instillated with 50% and 95% propylene glycol. 4. Multinucleated osteoclasts were seen in bone destruction area of granulation tissue and there were also seen osteoblasts and area of new bone formation adjacent to the bone resorption area.
임현호,남창우,Im, Hyeon-Ho,Nam, Chang-U 한국섬유공학회 1997 한국섬유공학회지 Vol.34 No.7
Cellulose-chitosan blend fibers were prepared by wet spinning. The blends were made by using the mixed solvent of dimethylacetamide (DMAc) containing 9% (w/w) lithium chloride (LiCl). Chitosan to be dispersed in DMAc was well mixed with cellulose-DMAc/LiCl solution system. The properties of the blend fibers were studied in terms of crystal structure, orientation, mechanical properties, and antimicrobial activity.
간세포암 환자에서 유사 특이성을 가진 자가항체의 변화 1예
임현호,김경희,정기철,안규대,우광숙,한진영,김정만 대한수혈학회 2017 大韓輸血學會誌 Vol.28 No.2
Changes in autoantibodies with mimicking specificity for Rh antigens are quite rare. Here, we report a 73-year-old male patient with hepatocellular carcinoma that showed changes in the autoantibodies with mimicking specificity. He was admitted to our hospital with mental alterations and hypoglycemia. The antibody identification test for RBC transfusion showed a pattern of agglutination, suggesting anti-E alloantibody and anti-c autoantibody. The patient was then diagnosed with hepatocellular carcinoma, and after 18 months, the antibody identification test showed a different pattern of agglutination, suggesting anti-E alloantibody and anti-C autoantibody. We recommend a careful evaluation to make sure an appropriate transfusion is performed when encountering fluctuating autoantibodies with mimicking specificity.
진성혈소판증가증 환자에 동반된 드문 der(Y)t(Y;1)(q12;q12) 1예
임현호,최재림,김보람,우광숙,김경희,김정만,김성현,한진영 대한진단검사의학회 2016 Laboratory Medicine Online Vol.6 No.3
Among hematologic diseases, structural abnormalities of autosomal chromosomes are well-known, but cases involving the sex chromosomes are uncommon. Duplications of the long arm of chromosome 1 have been reported in several hematologic diseases including myelodysplastic syndrome, myeloproliferative neoplasms, acute myeloid leukemia, acute lymphoblastic leukemia, and Burkitt lymphoma. However, dup(1q) as a der(Y)t(Y;1)(q12;q12) is very rare. Here, we report a case of essential thrombocythemia harboring der(Y)t(Y;1)(q12;q12) with literature review. 혈액 질환에서 다양한 상염색체 이상을 동반하는 경우는 잘 알려져 있지만, 성염색체 이상을 동반하는 경우는 드물다. 1번 염색체 장완의 중복은 골수형성이상증후군, 골수증식종양 외에도 급성골수성백혈병, 급성림프모구백혈병 및 버킷림프종 등의 여러 혈액 질환에서도 보고되어왔다. 하지만 1번 염색체 장완의 중복이 der(Y)t(Y;1)(q12;q12)로 나타나는 경우는 매우 드물다. 이에 저자들은 der(Y)t(Y;1)(q12;q12)를 가진 진성혈소판증가증 1예를 경험하였기에 문헌 고찰과 함께 보고하는 바이다.