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정환용(Whan-Yong Chung),천경아(Kyung-Ah Chun),정수일(Su-Il Jung),성승용(Seung-Yong Sung) 대한정형외과학회 2022 대한정형외과학회지 Vol.57 No.3
조직학적 및 임상적 연구에 의하면, 파열된 전방십자인대는 자체의 일차적 치유 능력이 매우 불량하여 자연 치유 되지 않는 것으로 알려져 있다. 1998년 Kurosaka 등이 최초로 보존적 치료 후 자연 치유된 전방십자인대의 증례를 발표한 바 있으며 이후 몇 예의 증례 보고 문헌만이 있다. 파열된 전방십자인대를 비침습적 보존적 치료를 시행하여 자연 치유 혹은 양호한 임상 결과를 보고한 문헌은 발표된 바 있으나 이는 추시 자기공명영상 혹은 임상 점수를 통해 확인한 문헌이 대부분이었다. 저자들은 자기공명영상 및 관절경으로 확인된 자연 치유된 전방 십자 파열의 증례를 경험하였기에 문헌 고찰과 함께 보고하고자 한다. The primary healing potential of anterior cruciate ligament (ACL) has been reported to be extremely poor in clinical and experimental studies. Most authors believe that the ACL does not heal spontaneously after rupture. In 1998, Kurosaka et al. reported two cases of a spontaneously healed torn ACL after non-surgical treatment; only a few cases have been reported. There are some reports of the spontaneously healed ACL or good clinical results after an ACL rupture in a conservative treatment group, but most studies were done by follow-up MRI or the clinical scores. This study experienced a case of spontaneous healing of a ruptured ACL confirmed by magnetic resonance imaging and arthroscopy. This paper reports a case with a review of the literature.
응집공정에 적합한 In-Line 정적혼화기를 이용한 혼화공정의 개선
정철우,강민수,최시환,정수일,손인식,강임석 대한상하수도학회 2003 상하수도학회지 Vol.17 No.3
The rapid mixing process for coagulation is a critical component in a water treatment plant. However, at the present time a detailed understanding of the rapid mixing by in-line mixer or generally accepted criteria for the design of in-line static mixer are not available. The aim of this work is therefore to improve the understanding of how the in-line static mixer works and how to better utilize it in coagulation process in water treatment. To investigate the performance of static mixer, coagulation experiments were conducted to compare the static mixer to the traditional backmixer under several coagulation conditions. Experiments were also performed to compare the coagulation efficiency of different mixing type of static mixer which were made using different flow rates and the number of elements equipped in a pipe. The static mixer performed better than the backmixer for all coagulation and mixing conditions tested. Especially, the static mixer was very effective in the surface charge neutralization, as showing higher reduction of negative charge with increasing mixing intensity. However, little difference was observed in the performance of the static mixer equipped with 2, 3, and 5 elements. Also, in a series of bench-scale studies of rapid mixing, the in-line static mixer performed better than the traditional backmixer for both adsorption and charge neutralization (A/N) mechanism and sweep coagulation mechanisms. Especially, the static mixer was more efficient at producing A/N mechanism conditions as a result of its fast and uniform dispersion of the coagulant.