An analysis of HIV patients visiting hospitals in Korea by complete enumeration:based on the Health Insurance Review and Assessment Service database

Objective@#This study investigated the hospital use patterns of patients with human immunodeficiency virus (HIV) infections in Korea. The prevalence of HIV infections in Korea is very low and there is no data on the type of medical treatment HIV patients receive. We therefore decided to perform a complete enumeration of the utilization of medical facilities by HIV patients using a nationwide claims database. @*Methods@#The nationwide Health Medical Insurance Review and Assessment (HIRA) service claims database was used to identify and include all new patients with HIV infections from 2013 to 2018. The current inpatient, outpatient, and emergency service use of these patients were investigated. The number of invasive procedures, interventions, and operations performed on these patients, and their death rate, was also investigated. @*Results@#The number of patients visiting outpatient departments increased by 44% from 2013 to 2018. The most frequently visited department was internal medicine, followed by emergency medicine. Dental procedures followed intravenous line insertions as the most common procedures undertaken by patients with HIV. @*Conclusion@#The results of this study show the status of hospital visits by patients with HIV infections in Korea and provide the basic data upon which policy decisions can be based.

Significance of Biomarkers as a Predictive Factor for Post-Traumatic Sepsis

PURPOSE@#Many traumatic patients die from sepsis and multiple organ failure. Early recognition of post-traumatic sepsis in traumatic patients will help improve the prognosis. Recently, procalcitonin (PCT), macrophage migration inhibitory factor (MIF), and lactic acid have emerged as predictive factors. Our study aims to explore the significance of PCT, MIF and lactic acid as a predictor of posttraumatic-sepsis in trauma patients.@*METHODS@#This study was conducted on prospective observational study patients who visited an emergency medical center in a university hospital from March 2014 to February 2016. We measured the white blood cells, c-reactive protein (CRP), lactic acid, PCT, and MIF with serum taken from the patient's blood within 1 hour of the occurrence of the trauma. The definition of post-traumatic sepsis was defined as being part of systemic inflammation response syndrome criteria with infections within a week.@*RESULTS@#A total of 132 patients were analyzed, wherein 74 patients were included in the low injury severity score (ISS) group (ISS < 15) and 58 patients were included in the high ISS group (ISS ≥15). The mean PCT, MIF, and lactic acid levels were higher in the high ISS group (p < 0.05). Meanwhile, 38 patients were included in the early sepsis group and 94 patients were included in the non-sepsis group. The mean MIF levels were higher in the sepsis group than the non-sepsis group (p < 0.05) and there were no significant differences in the initial CRP, lactic acid, and PCT levels in these two groups.@*CONCLUSIONS@#MIF may be considered as a predictive factor for sepsis in trauma patients.

Simple Maturation of Direct-Converted Hepatocytes Derived from Fibroblasts

Target cells differentiation techniques from stem cells are developed rapidly. Recently, direct conversion techniques are introduced in various categories. Unlike pluripotent stem cells, this technique enables direct differentiation into the other cell types such as neurons, cardiomyocytes, insulin-producing cells, and hepatocytes without going through the pluripotent stage. However, the function of these converted cells reserve an immature phenotype. Therefore, we modified the culture conditions of mouse direct converted hepatocytes (miHeps) to mature fetal characteristics, such as higher AFP and lower albumin (ALB) expression than primary hepatocytes. First, we generate miHeps from mouse embryonic fibroblasts (MEFs) with two transcription factors HNF4α and Foxa3. These cells indicate typical epithelial morphology and express hepatic proteins. To mature hepatic function, DMSO is treated during culture time for more than 7 days. After maturation, miHeps showed features of maturation such as exhibiting typical hepatocyte-like morphology, increased up-regulated ALB and CYP enzyme gene expression, down-regulated AFP expressions, and acquired hepatic function over time. Thus, our data provides a simple method to mature direct converted hepatocytes functionally and these cells enable them to move closer to generating functional hepatocytes.

The inflammatory response of neutrophils in an in vitro model that approximates the postcardiac arrest state

PURPOSE: Postcardiac arrest syndrome (PCAS) shares many features with sepsis including plasma cytokine elevation with dysregulation of cytokine production, and the presence of endotoxin in plasma. PCAS is closely related to ischemia-reperfusion injury. During ischemia-reperfusion injury, neutrophil, which is the first line of innate immunity, plays a major role. In this study, we investigated the inflammatory response of human neutrophils in an in vitro model which we simulated with hypoxia-normoxia and hypoxia-hyperoxia environments. METHODS: After separation of neutrophils from the whole blood, they were divided into 3 experimental groups: normoxia-normoxia, hypoxia-normoxia, and hypoxia-hyperoxia groups. The production of H₂O₂, the expression of Toll-like receptor 4 (TLR₄) receptor, and the extent of apoptosis of the neutrophils were checked. RESULTS: The in vitro hypoxia-normoxia and -hyperoxia models, which simulated the PCAS, showed initiation of the neutrophils' inflammatory reaction by hypoxia insult. Lipopolysaccharide amplifies such inflammation; therefore, prevention of secondary infection may be critical in postresuscitation patients. Temporary hyperoxia following hypoxic insult showed no difference in inflammatory reaction compared with hypoxia-normoxia. Rather, temporary hyperoxia may suppress or minimize inflammation by attenuation of TLR4 receptor. CONCLUSION: It is well known that continuous hyperoxygenation after successful cardiac arrest harms patients, but temporary hyperoxygenation with 100% O₂ in a clinical situation may be helpful.

Analysis of Trauma Patients with Massive Transfusion in the Emergency Department / 대한수혈학회지

BACKGROUND: It is important that proper protocols are in place for trauma patients who require massive transfusion upon arrival at the emergency department. This study is a preliminary analysis of massive transfusion cases at the emergency department of our institution aimed to review the characteristics and situations in which massive transfusion occurs in an effort to better manage trauma patients receiving massive transfusion in the emergency department. METHODS: This study was conducted at the Department of Emergency Medicine in the Korea University Guro Hospital. We retrospectively reviewed the medical charts of trauma-related patients who required massive blood transfusions between January 2013 and December 2015. The inclusion criteria were as follows: patients who were over the age of 18 years and received more than 4 packed RBC (pRBC) units per hour, or 10 or more pRBC units during a period of 24-hours. RESULTS: A total of 669 patients were included in the study. There were significant differences of initial systolic blood pressure (P<0.0001), diastolic blood pressure (P<0.0001), and Injury Severity Score (P<0.0001) between those who survived and those who expired. CONCLUSION: Proper initial resuscitation is essential for the improvement of outcome in trauma patients that require a massive transfusion. The findings from this study may serve as preliminary data in developing proper transfusion protocols for massive transfusion among trauma patients.

A Case of Aspiration Pneumonia with Acute Respiratory Distress Syndrome Following Aspiration of Polyethylene Glycol Solution Treated by Bronchoalveolar Lavage / 대한내과학회지

Colonoscopy requires adequate cleaning of the entire colon. Polyethylene glycol (PEG) is a popular laxative regimen because of the ease of applicability and optimal bowel preparation results. Although the safety and efficacy of this solution is well established, serious complications from the bowel PEG-cleansing procedure have been reported. Here, we report a case of a 79-year-old male who developed aspiration pneumonia with acute respiratory distress syndrome after administration of PEG by mouth before a scheduled colonoscopy. He was treated successfully with bronchoalveolar lavage and corticosteroids.

Transfusion Therapy in the Emergency Department / 대한수혈학회지

BACKGROUND: Most patients requiring transfusion are admitted to the general ward; however, the number of patients visiting the emergency department for transfusion is increasing. In this study, we reviewed the transfusion therapies that are performed in the emergency department and analyzed their status. METHODS: We conducted a retrospective review of the charts of patients who visited the emergency department in our hospital for transfusion therapy from October 1, 2008 to October 30, 2012. We collected and analyzed general information on the patients and divided them into groups according to the number and kind of blood products they received. RESULTS: A total of 4,497 patients visited the emergency department for transfusion therapy during the study period. Among 4,497 patients, 2,925 patients were enrolled in the study and 1,572 patients were excluded. Out of 2,925 patients, there were 1,745 male patients (59.66%) and 1,180 female patients (40.34%), mean age was 61.24 (+/-17.49); 2,340 patients (80.00%) were admitted, 364 (12.45%) discharged, 44 (1.50%) expired, and 177 (6.05%) were transferred. The most common cause for transfusion was upper and lower gastrointestinal bleeding (928, 32%), followed by trauma (548, 19%), malignancy (376, 13%), anemia (294, 10%), infection (281, 10%), and gynecologic (137, 5%) respectively. CONCLUSION: Performance of transfusion therapy in the emergency department is not uncommon; therefore, proper protocols by cause of bleeding will be required for prevention of unnecessary complication that may occur during transfusion therapy.

Detecting Potassium Imbalance: Whole Blood vs. Serum / 대한수혈학회지

BACKGROUND: Potassium, the most common cation in the intracellular space, plays a critical role in our physiology. Potassium imbalance may cause life-threatening problems, ranging from general weakness to cardiac arrest due to ventricular fibrillation. For emergency physicians, detection of such derangement within a short period of time is of critical importance. In this study, we wanted to determine whether analysis of whole blood samples can be used as a screening tool for potassium imbalance by comparative analysis of whole blood and serum samples. METHODS: Two samples were drawn from 227 patients. The whole blood sample was taken from the radial artery and contained in a commercially available arterial blood collection syringe with a lithium-heparin coating. The serum sample was contained in a commercially available vacuum bottle in a non-additive silicone coated tube and transported to the laboratory. The study population was divided into three groups, patients with normal whole blood potassium, patients with decreased whole blood potassium, and patients with elevated whole blood potassium. Potassium levels for each group were coupled with serum potassium levels and compared. RESULTS: No significant difference in potassium values was observed between whole blood and serum samples (P<0.05). Strong associations were observed among the three groups (normal range, hypokalemia, and hyperkalemia group). Compared to the normal group (r=0.851), the hyperkalemia group showed a stronger association between variables (r=0.897), and the hypokalemia group showed a weaker association (r=0.760). Their correlation coefficients were highly significant (P<0.05). CONCLUSION: Our study illustrates that point-of-care testing using whole blood with whole blood can be a reliable screening tool when treating patients with suspicious potassium abnormality, especially in hyperkalemia patients.

Hypertonic saline downregulate the production level of lipopolysaccharide-induced migration inhibitory factor in THP-1 cells / 대한외과학회지

PURPOSE: Macrophage migration inhibitory factor (MIF) may serve as a general marker for systemic inflammation in septic and nonseptic acute critical illness. Additionally, our previous experiment has demonstrated that immunosuppressant Prostaglandin E2 (PGE2) lowered MIF levels and inhibited T-cells proliferation when compared to control levels. The addition of hypertonic saline (HTS) increased MIF production as compared with PGE2-stimulated T-cells in concordance with restore PGE2-suppressed T-cells proliferation. Generally, HTS has been well known for its anti-inflammatory effect so far. Therefore, the experiments were conducted to evaluate MIF after stimulating lipopolysaccharide (LPS) either in the presence or absence of HTS in monocyte, in response to early phase injury. METHODS: Human acute monocytic leukemic cell line (THP-1) cells were cultured in RPMI media, to a final concentration of 1 x 10(6) cells/mL. The effect of HTS on LPS-induced MIF was evaluated in monocyte with 1 microg/mL LPS. HTS at 10, 20 or 40 mmol/L above isotonicity was added. MIF concentrations of the supernatant were determined by enzyme-linked immunosorbent assay, and cell lysates were used for Western blots analysis to determine the MIF expression. RESULTS: MIF concentrations in the cell supernatant increased in LPS-induced cells compared to control cells. Also, levels of MIF protein expression were higher in LPS stimulating cells. However, the addition of HTS to LPS stimulated cell restored MIF concentrations and MIF expression. CONCLUSION: The role of HTS in maintaining physiological balance in human beings, at least in part, should be mediated through the MIF pathway.

Predictive Factors for MDCT as a Primary Survey in Traumatic Cervical Spine Injury

PURPOSE: Missing cervical pathology after injury may lead to disability and influence long-term survival. Controversies continue to evolve concerning the initial screening methods used to predict cervical spine injury. Through a retrospective chart review, we attempted to analyze and propose factors predictive of cervical trauma. METHODS: Of all the patients who had visited the Emergency Department of Korea University, from January 2009 to December 2009, a retrospective review of the clinical records of the 217 patients who had undergone cervical spine computed tomography was done. We investigated whether we could predict the need for cervical spine computed tomography shortly after presentation in trauma patients by comparing the group with fractures and group without fractures and by finding risk factors showing significant differences between the two groups that might be used as guides in decision making. RESULTS: Of the 217 subjects who underwent cervical spine computed tomography scans, 33 were identified with fractures of the cervical spine while 184 were not. The most common mechanisms of trauma, in order, for those with fractures were falls, followed by traffic accidents. We found that the injury severity score, multiple injuries, a high-energy injury mechanism, neurologic deficit, and pain and tenderness of the cervical spine showed statistically significant differences between the two groups. CONCLUSION: Fractures of the cervical spine that are not observed with simple radiography occur with a relatively high frequency in trauma patients. Consideration should be given to the risk factors for cervical spine fracture, and if pertinent, cervical spine computed tomography should be performed with speed for early diagnosis of cervical spine fractures.

Impact of Initial Helical Abdominal Computed Tomography on the Diagnosis of Hollow Viscus Injury and Blunt Abdominal Traumare

PURPOSE: This study was conducted to examine the clinical significance IV-contrasted helical abdomen computed tomography (CT) as a diagnostic screening tool to evaluate hollow viscus injury in blunt abdominal trauma patients. METHODS: This is a retrospective study encompassing 108 patients, presenting to Korea University Medical Center (KUMC) Emergency Department (ED) from January 2007 to December 2007, with an initial CT finding suggestive of intra-abdominal injury. An initial non-enhanced abdomen CT was taken, followed by an enhanced CT with intravenous contrast. Patients' demographic data, as well as the mechanisms of injury, were inquired upon and obtained, initial diagnosis, as dictated by specialized radiologists, were added to post-operational (post-OP) findings and to additional CT findings acquired during their hospital stays, and all were combined to arrive at final diagnosis. Initial CT findings were further compared with the final diagnosis, yielding values for sensitivity, specificity, and accuracy, as well as positive and negative predictive values. Patients were further divided into two groups, namely, those that underwent operational intervention and those that did not. The initial CT findings of each group were subsequently compared and analyzed. RESULTS: Initial CT scans revealed abnormal findings in a total of 212 cases - solid organ injuries being the most common finding, as was observed in 97 cases. Free fluid accumulation was evident in another 69 cases. Based on the CT findings, 77 cases (71.3%) were initially diagnosed as having a solid organ injury, 20 cases (18.5%) as having a combined (solid organ + hollow viscus) injury, and 11 cases (10.2%), as having an isolated hollow viscus injury. The final diagnosis however, were somewhat different, with only 67 cases (62.0%) attributed to solid organ injury, 31 cases (28.7%) to combined injury (solid + hollow), and 10 cases (9.3%) to hollow viscus injury. The sensitivity (CI 95%) of the initial helical CT in diagnosing hollow viscus injury was 75.6%, and its specificity was 100%. The accuracy in diagnosing hollow viscus injury was also meaningfully lower compared to that in diagnosis of solid organ injury. Among patients initially diagnosed with solid organ injuries, 10 patients (2 from follow-up CT and 8 from post-OP finding) turned out to have combined injuries. A total of 38 patients underwent an operation, and the proportion of initial CT findings suggesting free air, mesenteric hematoma or bowel wall thickening turned out to be significantly higher in the operation group. CONCLUSION: Abdominal CT was a meaningful screening test for hollow viscus injury, but the sensitivity of abdominal CT was significantly lower in detecting hollow viscus injury as compared to solid organ injury. This calls for special consideration and careful observation by the ED physicians when dealing with cases of blunt abdominal trauma.

Experiences of Using Extracorporeal Life Support in Cardiac Arrest Unresponsive to Standard Cardiopulmonary Resuscitation

PURPOSE: Extracorporeal life support has been used as an extension of conventional cardiopulmonary resuscitation (CPR). However, the appropriate indications for extracorporeal CPR (ECPR) including the duration of CPR are unknown. We analyzed the cases of patients who received ECPR in our institute to find indicators for ECPR. METHODS: Patients who received ECPR in the emergency department of Korea University Ansan hospital from April 2006 to March 2007 were candidates for enrolment. Inclusion criteria were 1) a witnessed sudden cardiac arrest with correctable cause, 2) age <75 years, 3) cardiac arrest unresponsive to standard CPR, 4) absence of serious underlying disease such as advanced cancer, 5) impending arrest state due to respiratory failure or cardiogenic shock. Cardiac arrest related to trauma was excluded from the study. Tracked outcomes were hospital survival, improvement of Glasgow Coma Scale-motor respones, and return of spontaneous circulation. We analyzed the cause of arrest, arrest rhythm, time of administration of extracorporeal life support, and laboratory values. RESULTS: A total of seven patients received ECPR during one year. All patients achieved spontaneous circulation after ECPR and four patients showed improvement of GCS-motor response. Two patients were discharged alive. Their GCS and CPC were 15 points and 1 point, respectively. Intervention to correct underlying cause of arrest during ECPR, rapid start of ECPR during chest compression, and recovery of mean arterial pressure, heart rate, and urine output during ECPR all correlated with good outcomes. CONCLUSION: ECPR as a method of extended CPR improved the survival of cardiac arrest patients unresponsive to standard CPR.

Lactic Acidosis as a Prognostic Factor and a Therapeutic Guideline for Severe Sepsis and Septic Shock

PURPOSE: To examine the clinical utility of lactic acidosis as a predictor of in-hospital mortality and as an early therapeutic marker in severe sepsis and septic shock patients. METHODS: We conducted a prospective observational study. Patients visiting the emergency department from January 2005 to October 2006 who were suspected to have severe sepsis and septic shock were candidates for enrollment. Therapies in the emergency department consisted of early goal-directed resuscitation and employed central venous access, antibiotics, fluid resuscitation, mechanical ventilation, vasoactive agent, and inotropes as required. We measured hemodynamic variables, arterial blood gases, and serum lactate at presentation (0 hours) and at four hours. The SAPS II at emergency department and SOFA score at 0 hours, 4 hours, 24 hours, 48 hours and 72 hours were recorded. RESULTS: A total of 102 patients were enrolled during the study period. Data were presented as mean+/-SD. Thirtyfour patients died in the hospital, eighteen patients of them within 72 hours after admission. Septic shock was encountered in 44 patients. Non-survivors had significantly lower pH, higher serum lactate level, higher SAPS II scores, lower mean arterial blood pressure, higher heart rates, and lower PaO2/FiO2 values at 0 and 4 hours than did survivors. During the first four hours, persistent lactic acidosis and high SAPS II scores were independently associated with mortality. Although most patients achieved the therapeutic goals, excepting central venous oxygen saturation in nonsurvivors, patients with persistent lactic acidosis at 0 and 4 hours had significantly high in-hospital mortality and early overall mortality than other patients (80.0%, p=0.000, 65.0%, p=0.000, respectively). Patients recovering from lactic acidosis at 4 hours showed lower in-hospital mortality and early overall mortality than patients with persistent lactic acidosis (50.0% vs. 80.0%, p=0.070, 14.3% vs. 65.0%, p=0.004). CONCLUSION: Persistent lactic acidosis was found to be an independent variable for predicting mortality and morbidity. Persistent lactic acidosis may be used as a prognostic and treatment indicator during the resuscitation of patients with severe sepsis and septic shock in an emergency department.

A Case of Pancreatic Duct-Portal Vein Fistulae in Pancreatic Cancer / 대한소화기내시경학회지

Pancreatic fistulae follows pancreatic duct disruption and may develop as a complication of pancreatic disease or injury. The escaping fluid may be walled off by the surrounding viscera to form a pseudocyst or an abscess. Fistulae may drain spontaneously into adjacent hollow viscera or communicate with the body surface externally. Although internal pancreatic fistulas that communicate with adjacent internal organs are much less common, vascular communication with the pancreatic ductal system is especially unusual and generally represents a serious clinical situation. We experienced one case of pancreatic duct-portal vein fistula in a patient with pancreatic cancer. Endoscopic retrograde cholangiopancreatography revealed a large vascular structure representing the portal vein filled at the time of the contrast injection, indicating the presence of a pancreatic duct-portal vein fistulae.

A Case of Early Esophageal Cancer Treated by Endoscopic Mucosal Resection Using a EEMR Tube / 대한소화기내시경학회지

Although esophageal cancer has been recognized as difficult to treat, its long-term survival statistics are significant lower than those of other gastrointestinal cancers, Postoperative 5-year survival of the early esophageal cancer which invasion is limited to the mucosa is close to 100%. So, early detection of esophageal cancer has been extremely significant. Progress in the endoscopic technique has enabled to make not only early detection but also curative endoscopic resection of the early esophageal cancers. The indication for curative endoscopic resection of esophageal cancer are as follows: mucosal cancer apart from gross invasion to the muscularis mucosae without nodal involvement and less than 2 cm * 2 cm in size of lesion. EEMR tube(endoscopic esophageal mucoaal resection tube), which was designed by Makuuchi in 1991, is widely used for resection of early esophageal cancers. We report a case of patient with early esophageal cancer, who was admitted due to complation of postprandial epigastric pain, diageosed by endoscopy, endoscopic ultra sonography and chest computerized tomography, and successfully resected by using EEMR tube.