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Baekhee Lee,Seunghoon Lee,Hayoung Jung,Jawon Lee,Teukgyu Choi,Mina Lee,Hogeun Kim,Eunha Kim,Hojun Jeon,Youngbum Cho,Seungwoo Seo,Heecheon You 대한인간공학회 2014 대한인간공학회 학술대회논문집 Vol.2014 No.11
Objective: The present study is to evaluate satisfaction of vehicle outside door handles (ODHs) by design factor for improving grip comfort. Background: Existing studies have mainly focused on size and/or shape of typical handles (e.g., cylindrical handle); therefore, a specialized research for ergonomic ODH design is needed. Method: Satisfaction (operation, shape, height, width, tilting angle, central radius (R), inside upper R, inside middle R, inside lower R, pressure distribution, and overall satisfaction) by design factor (2-level: section width; 3-level: central R, inside upper R, inside middle R, inside lower R, tilting angle, and section height) were analyzed by applying a Taguchi L18 design (2¹ × 3<SUP>6</SUP>). Design levels by design factor were determined referring to 5 existing ODHs. 18 ODHs developed in the study were relatively evaluated comparing with a reference ODH (0 point) through an 11-point bipolar scale (-5: extremely dissatisfaction, 0: no difference, +5: extremely satisfaction) by twenty participants aged 20s ~ 50s. Results: Section width and inside upper R were significant on satisfaction of ODH. Conclusion: A design guideline for ODH was established considering users’ satisfaction. Application: The design factor evaluation protocol using Taguchi method applied in the study can be applicable to the other vehicle moving handles (e.g., inside door handle, door trim grip handle, door trim pull handle).
Rare Imaging of Fat Embolism Seen on Computed Tomography in the Common Iliac Vein after Polytrauma
( Hojun Lee ),( Jonghwan Moon ),( Junsik Kwon ),( John Cook-jong Lee ) 대한외상학회 2018 大韓外傷學會誌 Vol.31 No.2
Fat embolism refers to the presence of fat droplets within the peripheral and lung microcirculation with or without clinical sequelae. However, early diagnosis of fat embolism is very difficult because the embolism usually does not show at the computed tomography as a large fat complex within vessels. Forty-eight-year-old male with pedestrian traffic accident ransferred from a local hospital by helicopter to the regional trauma center by two flight surgeons on board. At the rendezvous point, he had suffered with dyspnea without any airway obstruction sign with 90% of oxygen saturation from pulse oximetry with giving 15 L of oxygen by a reserve bag mask. The patient was intubated at the rendezvous point. The secondary survey of the patient revealed multiple pelvic bone fracture with sacrum fracture, right femur shaft fracture and right tibia head fracture. Abdominal computed tomography was performed in 191 minutes after the injury and fat embolism with Hounsfield unit of -86 in his right common iliac vein was identified. Here is a very rare case that mass of fat embolism was shown within common iliac vein detected in computed tomography. Early detection of the fat embolus and early stabilization of the fractures are essential to the prevention of sequelae such as cerebral fat embolism.
A method to prevent cerebrospinal fluid leakage: Reinforcing acellular dermal matrix
Lee, Hojune,Eom, Ye Seul,Pyon, Jai-Kyong Korean Cleft Palate-Craniofacial Association 2020 Archives of Craniofacial Surgery Vol.21 No.1
In neurosurgical cases, problems related to wound healing can vary from simple wound dehiscence to multilayer defects. This study demonstrates an effective method to prevent persistent cerebrospinal fluid (CSF) leakage using reinforcing acellular dermal matrix in neurosurgical patients with wound dehiscence. A 52-year-old woman was admitted for management of recurrent glioblastoma. After tumor removal surgery, the patient experienced sustained CSF leakage from the wound despite reparative attempts. The plastic surgery team performed wound repair procedure after remnant tumor removal by the neurosurgery team. Acellular dermal matrix was applied over the mesh plate to prevent CSF leakage and the postoperative status of the patient was evaluated. No sign of CSF leakage was found in the immediate postoperative period. After 3 years, there were no complications including CSF leakage, wound dehiscence, and infection. We hereby propose this method as a feasible therapeutic alternative for preventing CSF leakage in patients experiencing wound problem after neurosurgical procedures.
Splenic Autotransplantation after Blunt Spleen Injury in Children
( Hojun Lee ),( Byung Hee Kang ),( Junsik Kwon ),( John Cook-jong Lee ) 대한외상학회 2018 大韓外傷學會誌 Vol.31 No.2
Non-operative management has been preferred in blunt spleen injury. Moreover children are more susceptible to post-splenectomy infection, spleen should be preserved if possible. However, splenectomy is inevitable to patients with severe splenic injury. Therefore splenic autotransplantation could be the last chance for preserving splenic function in these patients although efficacy has not proven. Here we reported four cases of children who were underwent splenic autotransplantation successfully after blunt trauma.