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경추보조기를 착용 후 후굴곡 하였을 때 나타나는 미끄러짐 현상
최한성 ( Han Sung Choi ),고영관 ( Young Gwan Ko ),김명천 ( Myung Chun Kim ),홍훈표 ( Hoon Pyo Hong ) 대한외상학회 2004 大韓外傷學會誌 Vol.17 No.2
Background: In many study reports, the cervical collar is effective in restricting 60 to 70 percent of cervical motion in 4 directions; flexion, extension, lateral bending, and rotation. But we discovered the phenomenon of sliding in the extensive motion of cervical vertebrae during the investigation about the effectiveness of cervical collars. Thus, the purpose of this study was to find out whether the cervical collars are effective in restricting the extensive motion of the cervical spine Methods: Fifteen volunteers, young men (23~32 years), with clinically and radiographically normal cervical spines were studied. The active cervical motion angles in flexion and extension were measured in each subject and were compared with the motion angles permitted in each of the two cervical orthoses (Philadelphia collar, Stifneck collar). We compared the restricting ability of cervical orthoses in the non-sliding state with the sliding state, especially during extension. One sample t-test, and paired t-test were used in the calculation of the statistics and the significant difference was indicated when p< 0.05. Results: With the pressure forced inferoposteriorly from the apex of the skull while extended, we created the sliding and compared the previously established method of measurement and the non-sliding state. The results showed significant difference among the three. The results, which the use of the previous method without considering the sliding was compared with the new method in consideration of the sliding, differed significantly. This phenomenon diminished the effect of restricting the cervical motion of the cervical orthoses by 50%. Conclusion: With the pressure forced inferoposteriorly given to a person wearing cervical orthoses, we could observe the occurrence of the phenomenon that occiput was slid along the rear slope face of cervical orthoses and that reduced the restricting effect of cervical extensive motion around 10%. Therefore, it must be considered that cervical orthoses need to be improved to reduce the motion for the direction.
기본심폐소생술(BLS, basic Life supporf)에 대한 2010년도 지침의 중요한 변화내용
최한성 ( Han Sung Choi ) 경희대학교 경희의료원 2010 慶熙醫學 Vol.26 No.2
In 1960, 14 patients who survived cardiac arrest with the application of closed chest cardiac massage were documented, then cardiopulmonary resuscitation(CPR) is now in widespread use. With broader use of CPR is now in widespread use. With broader use of CPR over the past several decades, some limitations and unintended consequences of the procedure have been identified. In addition, accumulated data have demonstrated low probabilities of survival and uneven success rates of CPR for certain subgroups. This article discusses the “recommendations of the 2010 AHA Guidelines” that confirm the safety and effectiveness of many approaches, acknowledge ineffectiveness of others, and introduce new treatments based on intensive evidence evaluation and consensus of experts. In addition, it is important to note that they will not apply to all rescuers and all victims in all situations. The leader of a resuscitation attempt may need to adapt application of these recommendations to unique circumstances.
굴곡과 신전 수동운동 상태에서 개별경추의 진자운동 및 병진운동의 운동학적인 특징
박성혁 ( Sung Hyuk Park ),최한성 ( Han Sung Choi ),홍훈표 ( Hoon Pyo Hong ),고영관 ( Young Gwan Ko ) 대한외상학회 2006 大韓外傷學會誌 Vol.19 No.2
Purpose: The aim of this study was to determine the kinematical characteristics of the pendular and the translational movements of each cervical vertebra at flexion and extension for understanding the mechanism of injury to the cervical spine. Methods: Twenty volunteers, young men (24~37 years), with clinically and radiographically normal cervical spines were studied. We induced two directional passive movements and then took X-ray pictures. The range of pendular movement could be measured by measuring the variation of the distance between the center point of two contiguous cervical vertebrae, and the range of translational movement could be measured by measuring the variation of the shortest distance between the center point of a vertebra and an imaginary line connecting the center points of two lower contiguous cervical vertebrae. The measurements were done by using a picture archiving and communicating system (PACS). Results: The total length of all cervical vertebrae in the neutral position was, on average, 133.66 mm, but in both flexion and extension, the lengths were widened to 134.83 mm and 134.79 mm, respectively. The directions of both the pendular and the translational movements changed at the 2nd cervical vertebra, and the ranges of both movements were significantly larger from the 5th cervical vertebra to the 7th cervical vertebra for flexion and combined flexion and extension motion (p<0.05). Conclusion: The kinematical characteristics for flexion and extension motions were variable at each level of cervical vertebrae. The 1st and the 2nd cervical vertebrae and from the 5th to the 7th cervical vertebrae were the main areas of cervical spinal injury. This shows, according to Hook`s law, that the tissues supporting this area could be weak, and that this area is sensitive to injury. (J Korean Soc Traumatol 2006;19:126-134)
독시라민 중독으로 발생한 횡문근융해증 환자에게서 혈중 크레아틴인산활성화효소 수치가 정상화되는 시기를 예측할 수 있는 인자
신민철,권오영,이종석,최한성,홍훈표,고영관,Shin, Min-Chul,Kwon, Oh-Young,Lee, Jong-Suk,Choi, Han-Sung,Hong, Hoon-Pyo,Ko, Young-Gwan 대한임상독성학회 2009 대한임상독성학회지 Vol.7 No.2
Purpose: Doxylamine succinate (DS) is frequently used to treat insomnia and it may induce rhabdomyolysis in the overdose cases. The purpose of this study is to evaluate the factors that can predict the serum creatine kinase (CK) level normalization time for patients with rhabdomyolysis due to DS ingestion. Methods: This study was conducted on 71 patients who were admitted with rhabdomyolysis after DS ingestion during the period from January 2000 to July 2009. Rhabdomyolysis was defined as a serum CK level over 1,000 U/L. The collected data included the general characteristics, the anticholinergic symptoms, the ingested dose, the peak serum CK level, the time interval (TI) from the event to the peak CK level and the TI from the event to a CK level below 1,000 U/L. We evaluated the correlation between the patients' variables and the TI from the event to the peak CK level time and the time for a CK level below 1,000 U/L. Results: The mean ingested dose per body weight (BW) was $30.86{\pm}18.63\;mg/kg$ and the mean TI from the event to treatment was $4.04{\pm}3.67$ hours. The TI from the event to the peak CK level was longer for the patients with a larger ingestion dose per BW (r=0.587, p<0.05). The CK normalization time was longer for the patients with a larger ingested dose per BW (r=0.446, p<0.05) and a higher peak CK level (r=0.634, p<0.05). Conclusion: The ingested dose per BW was correlated with the TI from the event to the peak CK level, and the ingested dose per BW and the peak CK level have significant correlations with the CK normalization time. These factors may be used to determine the discharge period of patients who had rhabdomyolysis following a OS overdose.