Serotonin syndrome is a drug-induced clinical syndrome caused by increased serotonin activity in the central nervous system. It occurs when starting a serotonergic drug, increasing its dose (including overdoses) or using a serotonergic drug in combination with other drugs. It manifests along a broad spectrum, ranging from mild side effects to life-threatening conditions. This condition should be suspected if patients have altered mental states, autonomic dysfunction, or neuromuscular symptoms such as clonus and tremor after using serotonergic drugs. Although the Hunter criteria have been widely used, new diagnostic criteria have recently been proposed to screen severe serotonin toxicity. It is necessary to differentiate it from neuroleptic malignant syndrome, which is associated with taking antipsychotic drugs that exert dopamine-antagonistic effects. If serotonin syndrome is suspected, the relevant drug should be stopped, and the patient should be treated with benzodiazepines. Severely ill patients with hyperthermia or neuromuscular symptoms require aggressive treatment. Serotonin receptor antagonists such as cyproheptadine or chlorpromazine have been tried as antidotes, but the level of evidence for their therapeutic effectiveness is very low.

Serotonin syndrome is a drug-induced clinical syndrome caused by increased serotonin activity in the central nervous system. It occurs when starting a serotonergic drug, increasing its dose (including overdoses) or using a serotonergic drug in combination with other drugs. It manifests along a broad spectrum, ranging from mild side effects to life-threatening conditions. This condition should be suspected if patients have altered mental states, autonomic dysfunction, or neuromuscular symptoms such as clonus and tremor after using serotonergic drugs. Although the Hunter criteria have been widely used, new diagnostic criteria have recently been proposed to screen severe serotonin toxicity. It is necessary to differentiate it from neuroleptic malignant syndrome, which is associated with taking antipsychotic drugs that exert dopamine-antagonistic effects. If serotonin syndrome is suspected, the relevant drug should be stopped, and the patient should be treated with benzodiazepines. Severely ill patients with hyperthermia or neuromuscular symptoms require aggressive treatment. Serotonin receptor antagonists such as cyproheptadine or chlorpromazine have been tried as antidotes, but the level of evidence for their therapeutic effectiveness is very low.

Serotonin syndrome is a drug-induced clinical syndrome caused by increased serotonin activity in the central nervous system. It occurs when starting a serotonergic drug, increasing its dose (including overdoses) or using a serotonergic drug in combination with other drugs. It manifests along a broad spectrum, ranging from mild side effects to life-threatening conditions. This condition should be suspected if patients have altered mental states, autonomic dysfunction, or neuromuscular symptoms such as clonus and tremor after using serotonergic drugs. Although the Hunter criteria have been widely used, new diagnostic criteria have recently been proposed to screen severe serotonin toxicity. It is necessary to differentiate it from neuroleptic malignant syndrome, which is associated with taking antipsychotic drugs that exert dopamine-antagonistic effects. If serotonin syndrome is suspected, the relevant drug should be stopped, and the patient should be treated with benzodiazepines. Severely ill patients with hyperthermia or neuromuscular symptoms require aggressive treatment. Serotonin receptor antagonists such as cyproheptadine or chlorpromazine have been tried as antidotes, but the level of evidence for their therapeutic effectiveness is very low.

Objective: The Scales for Outcomes in Parkinson’s Disease–Cognition (SCOPA-Cog) was developed to assess cognition in patients with Parkinson’s disease (PD). In this study, we aimed to evaluate the validity and reliability of the Korean version of the SCOPACog (K-SCOPA-Cog). Methods: We enrolled 129 PD patients with movement disorders from 31 clinics in South Korea. The original version of the SCOPA-Cog was translated into Korean using the translation-retranslation method. The test–retest method with an intraclass correlation coefficient (ICC) and Cronbach’s alpha coefficient were used to assess reliability. Spearman’s rank correlation analysis with the Montreal Cognitive Assessment-Korean version (MOCA-K) and the Korean Mini-Mental State Examination (K-MMSE) were used to assess concurrent validity. Results: The Cronbach’s alpha coefficient was 0.797, and the ICC was 0.887. Spearman’s rank correlation analysis revealed a significant correlation with the K-MMSE and MOCA-K scores (r = 0.546 and r = 0.683, respectively). Conclusion Our results demonstrate that the K-SCOPA-Cog has good reliability and validity.

This study aimed to investigate the prevalence of carbon monoxide (CO) poisoning and the provision of hyperbaric oxygen therapy (HBOT) in South Korea. We used data from the Korea Health Insurance Review and Assessment service. In total, 44,361 patients with CO poisoning were identified across 10 years (2010–2019). The prevalence of CO poisoning was found to be 8.64/10,000 people, with a gradual annual increment. The highest prevalence was 11.01/10,000 individuals, among those aged 30–39 years. In 2010, HBOT was claimed from 15 hospitals, and increased to 30 hospitals in 2019. A total of 4,473 patients received HBOT in 10 years and 2,684 (60%) were treated for more than 2 hours. This study suggested that the prevalence of both CO poisoning and HBOT in Korea gradually increased over the past 10 years, and disparities in prevalence were observed by region.

Purpose: The purpose of this study was to estimate the medical expenditures for poisoning patients in Korea using data from National Health Insurance and the Korea Health Panel Survey. Methods: The operational definition of poisoning was the presence of Korean Standard Classification of Diseases codes from T36 to T65. The number of poisoning patients, the amount of legal copayments, and benefit and non-benefit costs were extracted from both databases. The frequency of emergency, inpatient, and outpatient treatment utilization by poisoning patients was determined, and medical expenses were calculated. Linear regression analyses were performed to investigate factors affecting the medical expenses of poisoning patients. Results: The number of poisoning patients increased from 97,965 in 2011 to 147,984 persons in 2020. Medical expenses also increased by 74% from Korean won (KRW) 30.1 billion to KRW 52.3 billion, and benefit costs also increased by 79%. The average outpatient cost per person was KRW 67,660, and the inpatient cost was KRW 1,485,103. The average non-benefit medical expenses were KRW 80,298, accounting for about 16.2% of the total expenses. Multivariable analysis showed that the total expenditure was associated with economic status and disabilities. Conclusion The average medical expenditure per poisoning patient was KRW 534,302 in 2020, and poisoning-related costs gradually increased during the study period. Further research on the economic burden of poisoning should include indirect costs and reflect disease-adjusted life years.

Purpose: Most bee sting injuries are benign, although sometimes they can result in life threatening outcomes, such as anaphylaxis and death. The purpose of this study was to investigate the epidemiologic status of bee sting injuries in Korea and to identify risk factors associated with severe systemic reactions (SSRs). Materials and Methods: Cases were extracted from a multicenter retrospective registry for patients who had visited emergency departments (EDs) for bee sting injuries. SSRs were defined as hypotension or altered mental status upon ED arrival, hospitalization, or death. Patient demographics and injury characteristics were compared between SSR and non-SSR groups. Logistic regression was performed to identify risk factors for bee sting-associated SSRs, and the characteristics of fatality cases were summarized. Results: Among the 9673 patients with bee sting injuries, 537 had an SSR and 38 died. The most frequent injury sites included the hands and head/face. Logistic regression analysis revealed that the occurrence of SSRs was associated with male sex [odds ratio (95% confidence interval); 1.634 (1.133–2.357)] and age [1.030 (1.020–1.041)]. Additionally, the risk of SSRs from trunk and head/ face stings was high [2.858 (1.405–5.815) and 2.123 (1.333–3.382), respectively]. Bee venom acupuncture [3.685 (1.408–9.641)] and stings in the winter [4.573 (1.420–14.723)] were factors that increased the risk of SSRs. Conclusion Our findings emphasize the need for implementing safety policies and education on bee sting-related incidents to protect high-risk groups.

Considerable evidence has been published since the 2020 Korean Cardiopulmonary Resuscitation Guidelines were reported. The International Liaison Committee on Resuscitation (ILCOR) also publishes the Consensus on CPR and Emergency Cardiovascular Care Science with Treatment Recommendations (CoSTR) summary annually. This review provides expert opinions by reviewing the recent evidence on CPR and ILCOR treatment recommendations. The authors reviewed the CoSTR summary published by ILCOR in 2021 and 2022. PICO (population, intervention, comparator, outcome) questions for each topic were reviewed using a systemic or scoping review methodology. Two experts were appointed for each question and reviewed the topic independently. Topics suggested by the reviewers for revision or additional description of the guidelines were discussed at a consensus conference. Forty-three questions were reviewed, including 15 on basic life support, seven on advanced life support, two on pediatric life support, 11 on neonatal life support, six on education and teams, one on first aid, and one related to coronavirus disease 2019 (COVID-19). Finally, the current Korean CPR Guideline was maintained for 28 questions, and expert opinions were suggested for 15 questions.

Objective: This study verifies the practicality of the delta neutrophil index to lymphocyte ratio for the prognostic evaluation of sepsis patients. Methods: Records of 2,233 patients diagnosed with sepsis were reviewed; 1,042 patients were included in the final analysis. Receiver operating characteristic (ROC) curve studies were used to calculate the area under the curve (AUC) to determine the neutrophil-to-lymphocyte ratio (NLR) and the delta neutrophil-to-lymphocyte ratio (Delta-NLR). To adjust for skewed distributions, the NLR and Delta-NLR were analyzed after natural logarithm transformations. Multivariate logistic regression was applied to determine potential predictors for mortality. Results: To predict 30-day mortality, AUCs were performed using the values of days 0, 1, and 2 (0.604, P<0.0001; 0.648, P<0.0001; and 0.684, P<0.0001, respectively). The NLR results were 0.504 (P=0.8624), 0.553 (P=0.0191), and 0.598 (P<0.0001), respectively. The AUC increased significantly when the Delta-NLR at day 0 was combined with age, hemoglobin levels, and lactate levels. Further subgroup analysis was performed by dividing patients into an upper respiratory infection (URI) group, a gastrointestinal tract infection (GI) (including hepatobiliary infection) group, and a urinary tract infection (UTI) group. The predictive ability of the GI group was determined to be much higher than the other two groups. Conclusion Increase in the Delta-NLR of sepsis patients was found to be an independent predictor of mortality within 30 days.

Purpose: This study investigated the characteristics and treatment outcomes of patients who visited the emergency department due to intoxication and analyzed the impact of the coronavirus disease 2019 (COVID-19) pandemic on their visits. Methods: A retrospective study was conducted using data from the National Emergency Department Information System (NEDIS) on patients who visited the emergency department due to intoxication between January 2014 and December 2020. In total, 277,791 patients were included in the study, and their demographic and clinical data were analyzed. A model was created from 2014 to 2019 and applied to 2020 (i.e., during the COVID-19 pandemic) to conduct a time series analysis distinguishing between unexpected accidents and suicide/self-harm among patients who visited the emergency department. Results: The most common reason for visiting the emergency department was unintentional accidents (48.5%), followed by self-harm/suicide attempts (43.8%). Unexpected accident patients and self-harm/suicide patients showed statistically significant differences in terms of sex, age group, hospitalization rate, and mortality rate. The time series analysis showed a decrease in patients with unexpected accidents during the COVID-19 pandemic, but no change in patients with suicide/self-harm. Conclusion Depending on the intentionality of the intoxication, significant differences were found in the age group, the substance of intoxication, and the mortality rate. Therefore, future analyses of patients with intoxication should be stratified according to intentionality. In addition, the time series analysis of intentional self-harm/suicide did not show a decrease in 2010 in the number of patients, whereas a decrease was found for unintentional accidents.