Arsenic poisoning has three types of poisoning. First, acute arsenic poisoning is usually caused by oral intake of large amount of arsenic compound with purpose of homicide or suicide. Second, chronic arsenic poisoning is caused by inhalation of arsenic in the occupational setting or by long-term oral intake of arsenic-contaminated well water. Third, arsine poisoning occurs acutely when impurities of arsenic in non-ferrous metal react with acid. Clinical manifestation of acute arsenic poisoning is mainly gastrointestinal symptoms and cardiovascular collapse. Those of chronic poisoning are skin disorder and cancer. Arsine poisoning shows massive intravascular hemolysis and hemoglobinuria with acute renal failure. Exposure evaluation is done by analysis of arsenic in urine, blood, hair and nail. Species analysis of arsenic is very important to evaluate inorganic arsenic acid and mono methyl arsenic acid (MMA) separated from dimethyl arsenic acid (DMA) and trimethyl arsenic acid (TMA) which originate from sea weed and sea food. Treatment with dimercaprol (BAL) is effective in acute arsenic poisoning only.

Purpose: Dealing patients with organophosphate poisoning, cholinesterase level has been used as a diagnostic and prognostic value. But there are some controversies that the cholinesterase level is significantly related to the severity or prognosis of acute organophosphate poisoning. We evaluated the correlation between initial serum level of cholinesterase and APACHE II score as an index for severity, and we assessed cholinesterase levels for predicting value of weaning from mechanical ventilation. Method: From August 1996 to March 2003, 23 patients with organophosphate poisoning who needed ventilatory care were enrolled. Retrospective review was done for the serum level of cholinesterase, APACHE II score, and the duration of ventilatory care. The percentage of measured serum cholinesterase to median normal value was used to standardize cholinesterase levels from different laboratories. Result: There were tendencies that the lower initial serum of cholinesterase, the higher the APACHE II score (r=0.297) and the longer the duration of mechanical ventilation (r=-0.204), but they were not significant (p=0.264 and p=0.351 respectively). In 9 patients whose serum cholinesterase level were checked at the time of weaning, mean of measured cholinesterase level was $10.3\pm7.60\%$ of normal value. Conclusion: There was no significant relationship between initial level of serum cholinesterase and severity or duration of mechanical ventilation. General health status of patient, amount of ingestion, toxicity of agent should be considered as important factors for severity of poisoning. And the decision of weaning should be based not solely on the cholinesterase level but on the consideration of general and respiratory state of individual patients.

Backgrounds: Deaths from pesticides poisoning has increased annually, but no studies have been reported. Especially paraquat is suspected to be a major material in pesticide poisoning deaths. In Korea, simple epidemiology of pesticides poisoning is not well known. So, there is no effective method to prevent pesticides poisoning. We tried to investigate the present status of pesticides poisoning with data from Korea National Statistical Office and suggest an effective counterplan. Methods: We analysed death cause data derived from Korean Statistical association, deaths causes being pesticides poisoning in the year 2002. Also, we investigated data from internet, mainly from Korea National Statistical Office home page. Results: Total 2,875 persons died after pesticides poisoning in 2002 year. Average age is 54.2 year, standard deviation being 17.7 year. Many victims (about $41\%$) died during the herbicides' non-necessary period (JanuaryMarch, October-December) Conclusion: Herbicides sale should be restricted only during herbicides' necessary period, and so called a pesticides safety supervisor system shall effectively prevent herbicides poisoning.

Acute poisoning is one of the diseases which need the most fastest emergency measures at the very beginning. However, at present, The Korea doesn't manage the toxication all over the country, and in particular, there is no guide to medical cure paying due regard to the traits of each area. This paper focused on the issue that the necessary data in preparing the facilities for the treatment of the poisoned patients and materials for medical treatment including antidote would have to be collected, after finding the special features of the symptoms by searching the present conditions of the poisoning in small towns next to farm villages in the North area of Youngseo, Kangwon province. This study was based on the questionnaires from 111 patients who were carried into the emergency room by the poisoning in two university hospitals of the North area of Youngseo, Kangwon, for one year, 2002. Upon investigation, the patients(111) visiting emergency room by the acute poisoning during the research period was found to be 0.37 percent of all patients(30,085) visiting emergency room. Among them, the most high percentage was given in their twenties and thirties at the rate of $39.6\%$, and the ratio($40.5\%$) of the poisoned patients after their fifties was much higher than a research($10\%$) of other areas. Many poisoned patients came to their rescue in an emergency room generally in spring and in winter, from 7 a.m. to 3 p.m. Agricultural chemical of the toxic materials had a majority at a ratio of $57.7\%$, and paraquat of the agricultural chemicals was found to have a lot of toxicity by $31.7\%$. As the trace of the toxication, the oral poisoning was common by $89.2\%$, and $55.9\%$ in the case of operating gastric lavage and nasogastric irrigation, but only $14.4\%$ for prescribing antidote. The mortality of the acute poisoned patients was $17.2\%$, and the toxication by paraquat held a majority. As a result, the acute poisoning of the North area in Youngseo, Kangwon had both of the characteristics of the rural and the city, and the patients over their fifties by the population aging had more attack of the disease than other regions. Also, with the high ratio of the toxication by the agricultural chemicals, especially, the lethal agricultural chemical was used frequently. Therefore, these dangerous situations need to find the ways to cope with.

Purpose: The purpose of this study is to compare the toxicologic characteristics of two groups of patients with acute intoxication for two different time periods and to make recommendations based on the results of this study. Methods: We reviewed retrospectively the medical records of patients with acute intoxication in our emergency center from June 1997 to May 1998 (group A) and from June 2000 to May 2003 (group B), and we evaluated differences in the epidemiologic and the toxicologic characteristics between the two groups. Results: The ratios of the number of patients with acute intoxication to the total numbers of patients who visited our emergency department were $0.49\%$ and $0.52\%$ for groups A and B, respectively. In both groups many poisoned patients visited our emergency center from 4:00 pm to midnight. The interval between the time of intoxication and arrival at the hospital was significantly shorter in group B. The number of patients transferred to our emergency center was larger in group B. Attempted suicide was the major cause of acute intoxication in both groups. Major toxic substances in both groups were centrally active drugs and insecticides. The number of comatose and mechanically ventilated patients was larger in group B. However, there was no statistically significant difference in the mortality rates. Conclusion: Emergency physicians who manage intoxicated patients should recognize regional characteristics and differences in the toxicologic characteristics of poisoning. In addition, the establishment of a poisoning control center in the regional emergency center is necessary to integrate data control and to enhance specialized management of intoxicated patients.

Purpose: This study was to investigate the effects of ethanol in ingested patients by analyzing data from a single institution's registry, Methods: We conducted a prospective study of 50 patients who has ingested drugs with/without ethanol came to emergency department from January 2004 to May 2004. Only patients over 18 years of age were included. Clinical characteristics, general and specific treatment, laboratory finding, complication, and clinical outcomes were obtained from protocol. Patients were divided into two groups: drug ingested with alcohol (ethanol group, n=18), and ingested without alcohol (non-ethanol group, n=32). Results: The age, the amout of ingestion, the time to treatment, the systolic blood pressure, the diastolic blood pressure and the shock duration were not different between two groups. The AST level with the ethanol group was higher than with the non-ethanol group ($230.94\pm518.88$ U/L vs $43.22\pm63.39$ U/L, p=0.002). The ALT level with the ethanol group was higher than with the non-ethanol group ($97.06\pm152.98$ U/L vs $32.75\pm43.10$ U/L, p=0.001). The lactic acid level with the ethanol group was higher than with the non-ethanol group ($7.40\pm6.33$ mmol/L vs $3.77\pm3.10$ mmol/L, p=0.001). The hospital stay duration and the admission rate were not different between two groups. Conlusions: The ethanol increased the levels of serum AST, ALT and lactic acid in intoxicated patients. But the ethanol dose not increase admission rate and duration of admission stay in intoxicated patients.

Purpose: Paraquat is the most commonly used herbicide in Korea. Exposure to paraquat through the skin has resulted in local irritation or inflammation of varying degree, sometimes severe. The purpose of this study was to review the patients with paraquat poisoning by skin absorption. Methods: We analysed retrospectively the clinical and laboratory findings of 45 patients with paraquat poisoning after dermal exposure, who were admitted to Soonchunhyang University Cheonan Hospital from January 1999 to December 2003. Results: Among 870 cases of paraquat poisoning, 45 cases were exposed to paraquat through the skin. The peak incidence was the fifth decade($40\%$). The clinical symptoms were pain, pruritus, nausea, and vomiting. The major skin lesions were generalized vesicobullae and necrotic erosion in face, scrotum, trunk, upper and lower extremities and etc. All patients were survived after skin contact or inhalation of paraquat. Conclusion: This study illustrates the extreme toxicity of paraquat and demonstrates that lethal quantities of paraquat may be absorbed if repeated exposure to it. Stricter precautions, including the mandatory use of protective clothing, should be recommended whenever this material is used.

Purpose: This study analyzed the general features, psychiatric histories, past suicidal attempts and psychiatric diagnoses of suicide victims admitted via the emergency department (ED). Methods: Reviewing the charts of 138 inpatients of suicide attempts admitted via the ED from January 2002 to December 2003, we analyzed various data, including sex, age, season, stressful events, psychiatric histories, previous suicidal attempts, and psychiatric diagnoses during admission, and we used a chi-square test to chart the statistical data. Results: A significant difference was found between 1 st attempts and repeated attempts as to the mechanical methods used for the suicide attempts, There was a significant difference in the kinds of drugs between patients with and without psychiatric histories. In the psychiatric diagnosis, there was a significant difference in AXIS I between patients with and without psychiatric histories. In AXIS II, there was a significant difference between patients with and without psychiatric histories, 1st attempts and repeated attempts. Conclusion: We emphasize the importance of psychiatric consults, treatments, and follow-ups for suicide victims and the emergency physicians' function in helping them to contact psychiatric doctors.

Purpose: Several risk factors related with chronic complications and mortality related with liver injury of mushroom poisoning were reported. But, there were few reports about the long term outcomes. The aim was to evaluate the long term clinical outcomes in mushroom poisoning regarding the risk factors. Methods: Clinical data were reviewed and outcomes were evaluated with medical records and/or telephone interviews. The patients who had one or more risk factors such as markedly elevated aspartate aminotransferase (AST) or alanine aminotransferase (ALT), prolonged prothrombin time (PT) were classified into high risk group. Patients had no risk factor classified into low risk group. Results: From June 1989 to December 2003, nineteen mushroom poisoning patients admitted to Asan Medical Center, seven were male, and mean age was $58\pm9$ years old. All the patients accidentally ingested and the interval from ingestion to symptom onset was $9\pm4$ hours. There were four patients in high risk group, and fifteen in low risk group. In high risk group, peak AST was $2,263.3\pm1,303.0IU/L$most prolonged PT was $38.0\pm27.4\%$, and stuporous mental status was shown in one patient. In low risk group, laboratory values returned to the normal values but histological evaluation revealed specific features of toxic hepatitis on sixth hospital day. Chronic complications such as persistent or chronic hepatitis, mortality was not occurred during follow up period (from 10 months to 16 years) in both groups. Conclusion: Although the number of patients were small, there were no chronic complications or mortality related with liver injury after mushroom poisoning regardless risk factors of chronic complications and mortality.

Purpose: In recent review of physician suicides] the relative risk of physicians is higher than the general population. The majority of physician suicide were by poisoning. The purpose of this study was to analyse the medical personnels with suicide by poisoning compared with the general population. Methods: We reviewed medical records of 15 medical related personnels with suicide by poisoning who visited the emergency medical centers of St. Mary's and Kangnam St. Mary's hospitals from March 1998 to Aug 2004. For the comparison with general population in analysis] the collected data was acquired from medical records of 677 intoxicated patients in St. Mary's Hospital during the same period. Results: Fifteen suicides of physicians (n=7), nurses (n=4), medical students (n=2), pharmacist (n=1) and medical assistant technician (n=1) was evaluated with regard to the method of poisoning. Preferred methods were ingestion of medications orally ($54\%$) and by infusion/injection ($46\%$). The results were compared with the general population group (n=677: oral ingestion of medications $98\%$, inhalation $1.6\%$). Intoxications by infusion/injection predominated more clearly in physicians than in the total collective. Conclusion: Comparing with the general population, the tendency to a method of suicidal poisoning being typical of the profession rises among physicians and related occupations with the degree of specialization, caused by increasing knowledge, easier access to appropriate drugs and methods.

Ethylene glycol poisoning can cause profound morbidity and is almost universally fatal if untreated. Central nervous system depression, pulmonary edema, and acute oligulic renal failure with crystalluria are among the most commonly encountered complication of ingestion. Ingestion of ethylene glycol may be an important contributor in patients with metabolic acidosis and subsequent renal failure. The diagnosis of ethylene glycol poisoning is based on nonspecific clinical symptoms and signs and indirect and direct laboratory measurement of ethylene glycol. As a result, diagnosis and treatment sometimes can be delayed. We describe 52-year-old man who visited to emergency department with mental change of unknown origin. The patient has high anion gap metabolic acidosis and renal failure due to ingestion of antifreeze that contained ethylene glycol. We used hemodialysis for elimination technique. The patient was discharged with minimal complication.

Phalloides syndrome has usually occurred after incidental mushroom ingestion. It is sometimes difficult to differentiate toxic mushrooms from edible ones, especially in lay person because of their morphological similarities. In Korea, Amanita virosa and Amanita subjunquillea have been reported as a cause of fulminant hepatic failure in mushroom poisoning (phalloides syndrome). We report a case of phalloides syndrome who came to death with fulminant hepatic failure even though we planned liver transplantation and used T-PLS(R) (Twin Pulse Life Support) for hemodynamic support while waiting for the donor.

Acute cyanide poisoning is usually the result of attempted suicide which is often lethal within minutes or leads to a very poor prognosis after delayed and inadequate treatment. It affects the cerebral structures with the highest oxygen requirement, such as the basal ganglia, the cerebral cortex. We experienced a-45-year-old man who ingested Potassium Cyanide. He was stuporous. In 25 minutes, respiratory arrest developed and cardiopulmonary resuscitation was done. After return of spontaneous circulation, he admitted to intensive care unit, and conservative treatment was started. The clinical status was improved by degrees, but he couldn't perform daily activity like before. Minimal limitation of movement and memory deficit were left. In magnetic resonance imaging, which taken at the 11th day after admission, there were both basal ganglia and folia of cerebellum abnormality.

Laundery detergent ingestions are generally considered to have minor consequences. But some detergent ingestions have severe consequences. Unlike household bleaches contain sodium hypochlorite, bleaching agents that contain sodium carbonate have the potential to cause significant mucosal damage to the gastrointestinal tract if ingested. Especially, when ingested in solid form of Sodium carbonate, corrosive injury is much heavier. Therefore, patient who ingest sodium carbonate peroxyhydrate need more intensive management than patient who ingest other bleaches. We experienced a case of serious caustic injury after ingestion of Sodium Carbonate Peroxyhydrate. We report this case with review of literature.

Hydrogen sulfide is a colorless, and malodorous 'rotten eggs' gas that results from the decay of organic material. It is a byproduct of industry and agriculture. The mechanism of its toxicity is primarily related to inhibition of oxidative phosphorylation, which causes a decrease in available cellular energy. Because there is no rapid method of detection that is of clinical diagnostic use, management decisions must be made based on history, clinical presentation, and diagnostic tests that imply hydrogen sulfide's presence. Although there is some anecdotal evidence to suggest that the early use of hyperbaric oxygen is beneficial, supportive care remains the mainstay of therapy. We describe an occupational exposure to hydrogen sulfide gas in 51-year-old man. While cleaning the sewage of pigs. he became unconscious. When he arrived in the emergency department, he had irritability and confused mentality. The typical smell of rotten eggs on clothing and exhaled air were enough to be considered to be exposed to hydrogen sulfide. Hyperbaric oxygen therapy was performed. He had a recovery to normal function.

Causes of rhabdomyolysis can be divided into traumatic and nontraumatic, Among the nontraumatic rhabdomyolysis, it is known that ingestion of drugs is one of the common causes. However, there have been few reports that benzodiazepine overdose causes rhabdomyolysis, moreover there was no report about rhabdomyolysis after alprazolam overdose. We experienced a case of rhabdomyolysis after alprazolam overdose. A 51-year-old woman was brought to the emergency room 11 hours after ingestion of 30 tablets (15 mg) of alprazolam in a suicidal attempt. On admission she was comatose and her CK level was 8,290 lUlL. The CK level increased up to 25,598 IU/L 10 hours after admission, but she became alert on the third day. Subsequently the CK level decreased gradually with supportive care without renal impairment and she discharged from the hospital on the $10^{th}$ day. Although a pressure effect on the dependent portion of the body due to mental alteration before admission might have caused the rhabdomyolysis, the alprazolam, per se, cannat be ruled out for the cause.