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Woon Yong Kwon 5 Articles
Analysis of the Prognostic Factors in Trauma Patients with Massive Bleeding
Seok Ho Choi, Gil Joon Suh, Yeong Cheol Kim, Woon Yong Kwon, Kook Nam Han, Kyoung Hak Lee, Soo Eon Lee, Seung Je Go
J Trauma Inj. 2012;25(4):247-253.
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AbstractAbstract PDF
PURPOSE
Hemorrhage is a main cause of death in trauma patients. The goal of this study is to describe the characteristics of trauma patients with massive bleeding and to evaluate the prognostic factors concerning their survival.
METHODS
This study was performed retrospectively and included trauma patients with massive bleeding who had been treated from March 2007 to August 2012. The inclusion criterion was patients who received more than 10 U of packed red blood cells within the first 24 hours after visiting the emergency department. Based on their medical records, we collected data in terms of demographic findings, mechanisms of injury, initial clinical and laboratory findings, methods for hemostasis (emergency surgery and/or angioembolization), transfusion, injury severity score (ISS), revised trauma score (RTS) and trauma and injury severity score (TRISS). We used the Mann-Whitney U test and Fisher's exact test to compare the variables between the patients that survived and those that did not. We performed a logistic regression analysis with the significant variables from the univariate test.
RESULTS
Thirty-two(32) patients were enrolled. The main mechanisms of injury were falls and motor vehicle accidents. The mean transfusion amount of packed red blood cells (PRBC) was 17.4 U. The mean elapsed time for the first hemostasis (surgery or embolization) was 3.5 hours. The initial technical success rates were 83.3%(15/18) in angioembolization and 66.7%(8/12) in surgery. The overall mortality rate was 34.4%(11/32). The causes of death were bleeding, brain swelling and multiple organ failure. The ISS(25.5 vs 46.3, p=0.000), TRISS(73.6 vs 45.1, p=0.034) and base excess(<-12 mmol/L, p=0.020) were significantly different between the patients who survived and those who did not.
CONCLUSION
The ISS was a prognostic factor for trauma patients with massive bleeding.
Summary
Physician-staffed Helicopter Transport for Mountain-rescued Emergency Patients: a Pilot Trial
Jeong Ho Park, Sang Do Shin, Eui Jung Lee, Chang Bae Park, Yu Jin Lee, Kyoung Soo Kim, Myoung Hee Park, Han Bum Kim, Do Kyun Kim, Woon Yong Kwon, Young Ho Kwak, Gil Joon Suh
J Trauma Inj. 2012;25(4):230-240.
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AbstractAbstract PDF
PURPOSE
We aimed to compare the transport time, the proportion of direct hospital visit and the emergency procedures between the current mountain rescue helicopter emergency medical service (HEMS) and physician-staffed mountain-rescue HEMS.
METHODS
During weekends from October 2, to November 21, 2010, 9 emergency physicians participated as HEMS staff in the mountain-rescue HEMS program of the Seoul fire department. Patient demographic data, transport time, proportion of direct hospital visits, and emergency procedures were recorded. We also collected data on HEMS mountain-rescued patients from June 1, to September 1, 2010, and we compared them to those for the study patients. After an eight-week trial of the HEMS, we performed a delphi survey to determine the attitude of the physician staff, as well as the feasibility of using a physician staff.
RESULTS
Twenty-four(24) patients were rescued from mountains by physician-staffed HEMS during the study period, and 35 patients were rescued during the pre-study period. Patient demographic findings were not statistically different between the two groups, but the transport time and the emergency procedures were. During the study period, the time from call to take-off was 6.1+/-4.1 min (vs. 12.1+/-8.9 min during the pre-study period, p-value=0.001), and the time from call to arrival at the scene was 15.0+/-4.8 min (vs. 22.3+/-8.1 min during the pre-study period, p-value=0.0001). The proportions of direct hospital visit were not different between the two groups, but more aggressive emergency procedures were implemented in the study group. The delphi survey showed positive agreement on indications for HEMS, rapidity of transport and overall satisfaction.
CONCLUSION
A pilot trial of physician-staffed HEMS for mountain rescue showed rapid response and more aggressive performance of emergency procedures with high satisfaction among the attending physicians.
Summary
Management of Severe Trauma Patients in the Emergency Intensive Care Unit
Ji Ju Kim, Gil Joon Suh, Ki Young Jeong, Woon Yong Kwon, Kyung Su Kim, Hui Jai Lee, Yeong Cheol Kim, Seok Ho Choi, Young Ho Lee, Kyung Hag Lee, Kook Nam Han, Hwan Jun Jae, Hyo Cheol Kim
J Korean Soc Traumatol. 2011;24(2):98-104.
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AbstractAbstract PDF
PURPOSE
The aim of this study was to evaluate the quality of the trauma care system of our hospital, in which emergency physicians care for major trauma patients in the emergency intensive care unit (ICU) in consultation with intervention radiologists and surgeons.
METHODS
This was a retrospective observational study conducted in an emergency ICU of a tertiary referral hospital. We enrolled consecutive patients who had been admitted to our emergency ICU with major trauma from March 2007 to September 2010. We collected data with respect to demographic findings, mechanisms of injury, the trauma and injury severity score (TRISS), emergency surgery, angiographic intervention, and 6-month mortality. Then, we compared the observed and predicted survivals of the patients. The Hosmer-Lemeshow test and calibration plots by using 10 groups, one for each decile, of predicted mortality were used to evaluate the fitness of TRISS. P-values of greater than 0.05 represent a fair calibration.
RESULTS
Among 116 patients, 12 (10.34%) were dead within 6 months after admission to the ICU, and 29 (25.00%) and 38 (32.80%) patients received emergency surgery and angiographic intervention, respectively. The mean injury severity score and revised trauma score were 36.97+/-17.73 and 7.84+/-6.75, respectively. The observed survival and the predicted survival of the TRISS were 89.66% (95% confidence interval [CI]: 84.03~95.28%) and 69.85% (95% CI: 63.80~75.91%), respectively. The calibration plots showed that the observed survival of our patients was consistently higher than the predicted survival of the TRISS (p<0.001).
CONCLUSION
The observed survival for the trauma care system of our hospital, in which emergency physicians care for major trauma patients in the emergency ICU in consultation with intervention radiologists and surgeons, was higher than the predicted survival of the TRISS.
Summary
Time Course of Inducible NOS Expression of Lung Tissue during Sepsis in a Rat Model
Joong Hee Kim, Seong Chun Kim, Woon Yong Kwon, Gil Joon Suh, Yeo Kyu Youn
J Korean Soc Traumatol. 2008;21(2):120-127.
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AbstractAbstract PDF
PURPOSE
Many studies on the time course of inducible nitric oxide synthase (iNOS) gene expression have been performed in the LPS (Lipopolysaccharide)-induced endotoxemic model, but there have been few experimental approaches to continuous peritonitis-induced sepsis model. We conducted this study to establish basic data for future sepsis-related research by investigating the time course of iNOS gene expression and the relationship with the production of inflammatory mediators in the early sepsis model induced by cecal ligation and puncture (CLP).
METHODS
Male Sprague-Dawley rats were operated on by sing the CLP method to induce of peritonitis; and then, they were sacrificed and samples of blood and lung tissues were obtained at various times (1,2,3,6,9 and 12 h after CLP). We observed the expression of iNOS mRNA from lung tissues and measured the synthesis of nitric oxide, IL-1beta , and TNF-alpha from the blood.
RESULTS
iNOS mRNA began to be expressed at 3 h and was maintained untill 12 h after CLP. The nitric oxide concentration was increased significantly at 6 h, reached its peak level at 9 h, and maintained a plateau untill 12 h after CLP. TNF-alpha began to be detected at 3 h, increased gradually, and decreased steeply from 9 h after CLP. IL-1beta showed its peak level at 6 h after CLP, and tended to decrease without significance.
CONCLUSION
We observed that the iNOS gene was expressed later in peritonitis-induced sepsis than in LPSinduced sepsis. Nitric oxide and key inflammatory mediators were also expressed later in peritonitis-induced sepsis than in LPS-induced sepsis.
Summary
Effect of Heat Shock Protein 70 on Inducible Nitric Oxide Synthase during Sepsis in Rats
Yong Keun Lee, Hyo Keun Shin, Woon Yong Kwon, Gil Joon Suh, Yeo Kyu Youn
J Korean Soc Traumatol. 2008;21(1):59-65.
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AbstractAbstract PDF
PURPOSE
The aim of this study was to evaluate the effect of overexpression of heat shock protein 70 (HSP70) on the expression of inducible nitric oxide synthase and on the concentration of nitric oxide and to determine the mechanism for the relationship between HSP70 and inducible nitric oxide synthase (iNOS) in sepsis.
METHODS
Experiments were performed on male Sprague-Dawley rats, and sepsis was induced by using cecal ligation and puncture (CLP). Glutamine (GLN) or saline was administered 1 h after initiation of sepsis. We acquired serum and lung tissues from the rats 12 h or 24 h after initiation of sepsis. We analyzed the concentration of nitric oxide, the expression of HSP70 in the lung, and the gene expression of iNOS in the lung.
RESULTS
In CLP+GLN, glutamine given after initiation of sepsis enhanced the expression of HSP70 in the lung at 12 h (CLP+GLN vs. CLP:: 47.19 +/- 10.04 vs. 33.22 +/- 8.28, p = 0.025) and 24 h (CLP+GLN vs. CLP: 47.06 +/- 10.60 vs. 31.90 +/- 4.83, p = 0.004). In CLP+GLN, glutamine attenuated the expression of iNOS mRNA in the lung at 12 h (CLP+GLN vs. CLP: 4167.17 +/- 951.59 vs. 5513.73 +/- 1051.60, p = 0.025) and 24 h (CLP+GLN vs. CLP: 9,437.65 +/- 2,521.07 vs. 18,740.27 +/- 8,241.20, p = 0.016) and reduced the concentration of nitric oxide in serum at 12 h (CLP+GLN vs. CLP: 0.86 +/- 0.48 vs. 3.82 +/- 2.53 micromol/L, p = 0.016) and 24 h (CLP+GLN vs. CLP: 0.39 +/- 0.25 vs. 1.85 +/- 1.70 micromol/L, p = 0.025).
CONCLUSION
The overexpression of HSP70 induced by the administration of glutamine in sepsis attenuated the gene expression of iNOS and reduced the concentration of nitric oxide.
Summary

J Trauma Inj : Journal of Trauma and Injury