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Subcutaneous Emphysema and Inflammation of the Neck after Tracheal Puncture by an Intubating Stylet
Jung, Gul,Byun, Woo Mok,Lim, Hyung Jun,Kim, Jong Gyun,Kwak, Dong Min,Lee, Deok Hee,Kim, Sae Yeon,Song, Sun Ok,Seo, Il Sook,Jee, Dae Lim,Kim, Heung Dae,Park, Dae Pal 영남대학교 의과대학 2007 Yeungnam University Journal of Medicine Vol.24 No.2
한 41세 남자 환자가 충수돌기염 절제술을 받기 위하여 전신마취를 받았다. 삽관을 위해 후두경으로 보자, 난해한 기도삽관이 예상되어 유도자를 사용하였다. 기도삽관 중 돌출된 유도자가 기도를 손상시켰으며, 이에 의해 목에서부터 상부종격동까지의 피하기종과 목의 염증성 종창이 생겼다. 환자는 호흡곤란과 관련된 증상을 보이지 않아 호흡기의 손상을 의심하기 어려웠고, 주 증상이었던 염증성 종창에 초점을 두게 되어 진단에 차질을 빚었으나, 환자는 대증치료로 회복하였다. 유도자를 사용하여 기관내 삽관을 하는 경우 유도자의 위치를 재점검하여 유도자에 의한 기도 손상을 유발하지 않도록 유념해야 할 것이다. Laryngo-tracheal perforation caused by the use of a stylet during tracheal intubation is a rare complication. We present a case of subcutaneous emphysema and connective tissue inflammation after tracheal intubation. The patient was a 41-year-o1d male undergoing general anesthesia for an appendectomy. The intubation was difficult during laryngoscopy (Cormack- Lehane Grade III). An assistant provided an endotracheal tube with a stylet inside while the laryngoscope was in place. During intubation, a short, dull sound was heard with a sudden loss of resistance after the distal tip of the endotracheal tube passed the rima glottis. A sonogram and computerized tomography revealed subcutaneous emphysema from the neck to the upper mediastinum and fluid collection between the trachea and the thyroid. This lesion apueared to have been caused by the protruded, loose stylet. Anesthesiologists should be aware of the damage a loose stylet protruding beyond the tip of the endotracheal tube can cause.
( Yeon Hee Park ),( Chae Uk Chung ),( Jae Woo Choi ),( Sang Ok Jung ),( Sung Soo Jung ),( Jeong Eun Lee ),( Ju Ock Kim ),( Jae Young Moon ) 영남대학교 의과대학 2015 Yeungnam University Journal of Medicine Vol.32 No.2
Bronchiolitis obliterans (BO), which is associated with graft-versus-host disease after allogenic hematopoietic stem cell transplantation, is a major obstacle to survival after bone marrow transplantation due to its gradual progress, eventually leading to respiratory failure. Pumpless extracorporeal interventional lung assist (iLA) is effective in treatment of reversible hypercapnic respiratory failure. In this paper, we present a 23- year-old female patient who underwent allogeneic peripheral blood stem cell transplantation (PBSCT) for acute lymphocytic leukemia. After 6 months, she complained of shortness of breath and was diagnosed with BO. Five months later, she developed an upper respiratory tract infection that worsened her BO and caused life-threatening hypercapnia. Since mechanical ventilation failed to eliminate CO2 effectively, iLA was applied as rescue therapy. Her hypercapnia and respiratory acidosis showed significant improvement within a few hours, and she was successfully weaned off iLA after 12 days. This is the first case report of iLA application for temporarily aggravated hypercapnia of PBSCT-associated BO followed by successful weaning. This rescue therapy should be considered in ventilator-refractory reversible hypercapnia in BO patients.
Yeon Ok Seo,Roscinto Ian C. Lumbres,Hyun Kyu Won,Sung-Cheol Jung,이영진 한국생태학회 2015 Journal of Ecology and Environment Vol.38 No.4
This study was conducted to develop stem volume models for the volume estimation of Quercus glauca Thunb. in Jeju Island, Republic of Korea. Furthermore, this study validated the developed stem volume models using an independent dataset. A total of 167 trees were measured for their diameter at breast height (DBH), total height and stem volume using non-destructive sampling methods. Eighty percent of the dataset was used for the initial model development while the remaining 20% was used for model validation. The performance of the different models was evaluated using the following fit statistics: standard error of estimate (SEE), mean bias (E ), absolute mean deviation (AMD), coefficient of determination (R2), and root mean square error (RMSE). The AMD of the five models from the different DBH classes were determined using the validation dataset. Model 5 (V = aDbHc), which estimates volume using DBH and total height as predicting variables, had the best SEE (0.02745), AMD (0.01538), R2 (0.97603) and RMSE (0.02746). Overall, volume models with two independent variables (DBH and total height) performed better than those with only one (DBH) based on the model evaluation and validation. The models developed in this study can provide forest managers with accurate estimations for the stem volumes of Quercus glauca in the subtropical forests of Jeju Island, Korea.