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Outcomes of Wedge Wing in the Lag Screw for Unstable Intertrochanteric Fractures in Elderly Patients
( Jong Seok Baik ),( Keon Rok Kim ),( Byung Ha Park ),( Suc Hyun Kweon ) 대한고관절학회 2021 Hip and Pelvis Vol.33 No.2
Purpose: To evaluate clinical-functional and radiologic outcomes of elderly patients with an unstable intertrochanteric femur fracture treated with a wedge wing in the lag screw. Materials and Methods: Forty-eight patients treated with the Dyna Locking Trochanteric nail (DLT nail) to resolve an unstable intertrochanteric femur fracture were reviewed retrospectively. Based on AO/OTA classification, Fracture 31-A2 (34 cases) and 31-A3 (14 cases) were included in the analysis. We measured the femoral neck-shaft angle, tip-apex distance (TAD), Cleveland index, sliding distance of the lag screw, and time to the fracture union. The Harris Hip Score and Paker and Palmer’s mobility score for clinical evaluation were used. Results: The mean follow-up period was 21.4 months (range, 12-34 months). The postoperative state of reduction was good in 28 cases and acceptable in 20 cases. The mean TAD was 20.5 mm. The position of the lag screw was center-center in 30 cases and center-inferior in 18 cases. The mean sliding distance of the lag screw was 3.4 mm at the last follow-up. The mean union time was 4.5 months. Two cases had complications which included a cut-out (1 case) and non-union (1 case). The mean Harris Hip Score was 86.5±8.3 (range, 76-90). Walking ability in 34 of the cases (70.8%) at last follow-up was similar to that prior to fracture. Conclusion: Functional and radiological outcomes are satisfactory using the DLT nail in the treatment of elderly patients with unstable intertrochanteric fractures; however, wedge wing in the lag screw does not prevent implant-related complications.
Case of recurrent Stevens-Johnson syndrome
( Jong Baik Kim ),( Hoo Min Choi ),( Sung Min Kim ),( Byung In Ro ),( Han Kyoung Cho ),( Eun Jung Ko ) 대한피부과학회 2018 대한피부과학회 학술발표대회집 Vol.70 No.1
Stevens Johnson Syndrome (SJS) is a hypersensitivity reaction that typically involves the mucous membranes and the skin due to unpredictable reaction mostly by medication. Common drugs that causes SJS include carbamazepine, sulfonamide antibiotics, allopurinol and lamotrigine. Severe damage to the mucous membranes and skin makes SJS a life-threatening disease, which requires hospitalization. Serious complications can include sepsis, pneumonia, shock, multiple organ failure, and death. In case of epidemiology, SJS is a rare disease, affecting 1 to 2 per million people each year. A 62 year old male patient visited the emergency room due to erythema, bulla and erosions on his whole body. The patient thinks the symptoms were caused by intaking or inhaling his chronic obstructive pulmonary disease drugs. The patient had two past history of SJS in two and three years ago. The cause of SJS in the past was not definite, however brufen was the most causative drug. Interestingly, SJS, a rare disease affecting 1 to 2 per million people each year was present on one patient with two different type of drugs.
Thermal Loss due to Non - Ideal Gas Behavior of Helium in VM Heat Pump
Jong-Hoon Baik,Ho-Myung Chang 대한설비공학회 1997 International Journal of Air-Conditioning and Refr Vol.5 No.-
A cycle analysis is performed to investigate how the non-ideal gas behavior of helium reduces the heating capacity of VM heat pumps. Since the operating pressures of VM heat pumps are as high as 1 to 20 ㎫, the compressibility factor of helium becomes clearly greater than 1 and the non-ideal gas behavior always represents a thermal loss in heating. To calcutlate the amount of the losses, an adiabatic cycle analysis is performed with the real properties of helium and the net enthalpy flows through the two regerators are numerically obtained. It is shown that the non-ideal gas losses could be as much as 8% in the heating capacity when the operating pressures are greater than 10㎫. The effects of the operating temperatures and the dead volumes on the loss are presented.
An Adiabatic Analysis of Stirling Refrigerator with Real Gas Properties of Helium
Jong-Hoon Baik,Ho-Myung Chang 대한설비공학회 1996 International Journal Of Air-Conditioning and Refr Vol.4 No.-
A Finkelstein adiabatic analysis for Stirling refrigerators is performed with real gas properties of helium. The mass balance and the energy balance equations are formulated into the form that is convenient for incorporating an available computer code to calculated the helium properties. An efficient computer program is developed to find the cyclic steady state for the given values of the input parameters, such as the displaced mass ratio, the dead volume ratio, the total mass of helium or the refrigeration temperature. The calculated coefficient of performance (COP) for the refrigeration and the pressure variation are compared with the results obtained when helium is assumed to be an ideal gas. The relative errors in COP are presented as functions of the refrigeration temperature and the maximum cycle pressure.
Serum Sickness-like Reaction in a Patient with an Acute Exacerbation of Hepatitis B
( Jong Baik Kim ),( Hyun Ok Son ),( Sin Wook Chun ),( Suk Young Lee ),( Byung In Ro ),( Han Kyoung Cho ),( Han Gyu Choi ) 대한피부과학회 2017 大韓皮膚科學會誌 Vol.55 No.2
Serum sickness-like reaction (SSLR) is an abnormal self-limited reaction that can cause fever, myalgia, fatigue, lymphadenopathy, arthralgia, and skin rashes. Its etiology is yet unknown; however, SSLR often develops in patients with hepatitis B and after drug and vaccination administration. SSLR`s typical cutaneous manifestations include polycyclic, erythematous wheal-like or plaque-like lesions. A 47-year-old male hepatitis B carrier visited our emergency department with high fever and multiple annular erythematous plaques with clear centers on his trunk and upper and lower extremities. The patient`s hematologic laboratory results indicated an acute exacerbation of hepatitis B, and his symptoms correlated with those of SSLR. Here, we report a case of SSLR in a patient with an acute exacerbation of hepatitis B with clinical, hematological, and histopathological evidence. (Korean J Dermatol 2017;55(2):132∼ 135)