Comparison of urinary on-site immunoassay screening and gas chromatography-mass spectrometry results of 111 patients with suspected poisoning presenting at an emergency department

On-site tests based on immunoassay techniques are widely used for toxicologic screening analysis in patients with suspected poisoning. However, such assays usually have been validated using urine samples with known concentrations of the investigated substances. In the present investigation, on-site screening results were evaluated in a clinical setting. This was a retrospective study of patients with suspected poisoning from January to December 2003 in the emergency department of a tertiary urban hospital. Urine samples were analyzed using the Triage 8 panel and gas chromatography-mass spectrometry (GC-MS). A total of 111 patients were included (54 female, 57 male; average age 37.8 +/- 19.7 years). A total of 3.8% of the patients showed no symptoms, 45.2% minor, 24.0% moderate, and 26.9% serious symptoms. In 50 patients (45.0%), Triage 8 results corresponded well with GC-MS results. In 17 patients (15.3%), the Triage 8 results were confirmed by GC-MS, but additional substances were determined that could not be detected by the Triage 8 panel. A completely negative Triage 8 screening result was obtained in 23 patients (20.7%) who showed toxicologically relevant findings in GC-MS. In 21 patients (18.9%), Triage 8 results could not be confirmed by GC-MS. The analysis of the results in view of the patients' medical histories revealed that in 20 patients (18.0%), no relevant toxic substance could be detected. Additionally, 8 patients (7.2%) showed intoxication with alcohol, which could not be detected by the presently applied toxicologic screening investigations. On-site screening results in suspected poisoning were not very helpful in the present study because practically every second patient ingested substances that were not detectable by the Triage 8 device. In addition, every fifth result was not in line with GC-MS findings. On-site test findings should be interpreted very carefully, and in critical cases, a GC-MS screening should be performed.     

Diagnostic accuracy of urinary amanitin in suspected mushroom poisoning: a pilot study

BACKGROUND. Amatoxin-containing species are responsible for the most severe cases of mushroom poisoning, with high mortality rate. Therefore, this poisoning should be ruled out in all patients presenting gastrointestinal symptoms after wild mushroom ingestion. OBJECTIVE. To determine sensitivity, specificity, positive predictive value, negative predictive value, and diagnostic efficacy (DE) of urinary amanitin analysis in cases of suspected mushroom poisoning. METHODS. All cases of mushroom ingestion referred to a Poison Center during a one-month period were analyzed. Amanitin measurements were performed by ELISA method (functional least detectable dose 1.5 ng/ml; cut-off value not clearly established). Gastrointestinal symptoms latency and initial clinical assessment were considered alternative diagnostic tools. Definitive diagnosis was used as the reference standard. RESULTS. Among 61 patients included in the study, amatoxin poisoning was diagnosed in 10 cases. Urine samples were collected 5.5 to 92 hours after mushroom ingestion. Urinary amanitin DE was 91.8%, 93.4%, and 80.3%, based on the cut-off value considered (1.5, 5.0, and 10.0 ng/ml, respectively). Symptoms latency longer than 6 hours and initial clinical assessment DE were 70.5% and 67.2%, respectively. To identify amatoxin poisoning, initial clinical assessment resulted more sensitive and urinary amanitin analysis more specific. CONCLUSIONS. Urinary amanitin analysis is a valuable diagnostic tool and may significantly contribute to the management of suspected mushroom poisoning. At present, the best diagnostic accuracy can be obtained taking advantage of both the high sensitivity and negative predictive value of the clinical assessment performed by an experienced toxicologist, and the high specificity and positive predictive value that characterize urinary amanitin analysis.     

儿童误服药(毒)物中毒87例分析

目的:研究探讨儿童因误服药(毒)物中毒的情况以及加强家庭安全用药管理的对策。方法:选择2013年1月至2016年1月在我院进行诊治的误服药(毒)物中毒的患儿87例为研究对象,在对患儿进行救治后,对患儿及其家长进行调查,通过患儿病情的一般情况、实验室检查等分析儿童误服药(毒)物中毒的年龄分布以及误服药(毒)物的类别,并根据患儿的发病趋势分析家庭安全用药管理对策。结果:>2岁~4岁组患儿误服药(毒)物中毒的发生率(45.98%)明显高于其他年龄组。除药物外,误服农药也需引起重视。因误服药(毒)物中毒而导致住院治疗的患儿平均住院时间为5.54d。平均住院费用为8 269.8元。结论:儿童常由于误服药(毒)物而造成意外中毒,尤以>2岁~4岁的儿童发生率较高。家长需加强对家庭中常用药(毒)物的管理,降低患儿意外误服药(毒)物的发生率,减少患儿意外伤害事件的发生。     

Profile of hospital admissions following acute poisoning--experiences from a major teaching hospital in south India

This study was conducted to determine the incidence of hospital admissions following acute poisoning, nature of agents involved and change in pattern of poisoning over a 5-year period. Data from hospital records of all admissions to emergency department following acute poisoning collected prospectively were analysed for the period January 1993 to January 1998. A steady increase in deliberate poisoning using pesticides, particularly among young adults, was noted. Kerosene (paraffin) was the commonest poison in children and plant poisons were also common. There were 52 deaths (3.3%) among the 1584 admissions. The majority of deaths were due to pesticides. Poisoning and mortality followed ingestion of readily-available and commonly used agents. Measures to increase public education, counselling and awareness could prevent a number of these admissions.     

Case reports of lead poisoning in dogs from the National Animal Poison Control Center and the Centre National D'Informations Toxicologiques, Veterinaires: anecdotes or reality?

This paper presents case reports of lead toxicoses from 2 major animal poison control centers in Europe and North America, gathered from 1985 through 1989. All results examined here involved cases assessed as "toxicosis" or "suspected toxicosis" by the National Animal Poison Control Center (NAPCC) or the Centre National d'Informations Toxicologiques Veterinaries (CNITV). 537 cases were reported to the NAPCC, most of them concerning dogs (59%). In France, most of the 362 cases involved cattle (57.2%). There was an increased number of cases reported during late summer and early fall, and a decreased number of cases in November and December, in both centers. Dogs intoxicated were predominantly young animals (60% were less than 2 years old). No sex difference was noted. Pure bred dogs appeared more often involved than mixed-breed ones, but the breed distribution closely resembles dog breed distribution in the US. The source of lead was usually unknown and, when information was available, paint seemed to be the most common cause of poisoning. Clinical signs reported to the animal poison control centers involved the CNS and GI tract. Results from the French and the American database showed similar trends. They are compared to data from veterinary clinics and veterinary colleges in the US and Australia. In each case, data are very similar to what was reported to the CNITV and the NAPCC. It is concluded that animal poison control centers databases can provide a useful tool for better knowledge of animal poisoning. They can also help identify unexpected toxicologic problems related to drug administration or pesticide use.     

住院儿童药物中毒47例临床分析与药学服务

目的 分析儿童药物中毒病例特点,探讨药师在预防和治疗儿童药物中毒过程中可提供的多样化药学服务。方法 回顾性统计分析宁波市妇女儿童医院2020年1月1日—2023 年6月30日收治的47例住院儿童药物中毒病例,并结合宁波市妇女儿童医院实际,讨论药学服务切入点。结果 药物中毒的患儿主要是青春期女孩。中毒原因多为有意服药自杀,共33例(70.21%),另有患儿自行误服12例(25.53%),及家长看错用药剂量导致药物过量2例(4.26%)。临床症状以嗜睡及昏睡28例,头晕16例,恶心呕吐14例,腹痛11例常见。中毒药物种类多为精神类药品,共39例(82.98%)。入院后,洗胃40例(85.11%),血液净化11例(23.40%),结合利尿、导泻等方式清除毒物,并根据毒物种类选用特效药物解毒,以及给予对症支持治疗,最终47例均好转、治愈出院。结论 基于儿童药物中毒的临床特点,药师可积极参与预防和诊治工作,以减少药物中毒的发生,改善中毒患儿预后。在预防方面,药师配发药品时应做好用药交代和用药宣教,尤其是对于精神类药品和剂量易混淆药品;在救治时,临床药师可从毒物的检测分析,毒物的清除,特效解毒药物的选用,药物儿童剂量的查询等多个方面对中毒患儿开展全程药学监护。     

Correlation between symptoms developed after the oral ingestion of 50 g lactose and results of hydrogen breath testing for lactose intolerance

Background Lactase deficiency is a common condition responsible for various abdominal symptoms. Lactose hydrogen breath test is currently the gold standard in diagnosing lactose intolerance. Aim To assess sensitivity and specificity of symptoms developed after oral lactose challenge. Methods Intensity of nausea, abdominal pain, borborygmi, bloating and diarrhoea was recorded every 15 min up to 3 h after ingestion of 50 g lactose in patients with positive (i.e. breath H2‐concentration ≥20 p.p.m. above baseline) and negative lactose hydrogen breath test. Results Between July 1999 and December 2005, 1127 patients (72% females) underwent lactose hydrogen breath test. A positive result was found in 376 (33%). Sensitivity of individual symptoms ranged from 39% (diarrhoea) to 70% (bloating) while specificity ranged from 69% (bloating) to 90% (diarrhoea). A positive lactose hydrogen breath test was found in 21% of patients with one symptom, 40% of patients with two symptoms, 44% of patients with three symptoms, 67% of patients with four symptoms and 82% of patients with five symptoms. Symptom intensity was significantly higher for each symptom in the positive group. Conclusion Evaluating symptoms developed after ingestion of 50 g lactose can be used as a simple screening test to select patients who need to be referred for lactose intolerance testing.     

Paediatric poisoning in Kuwait-Al Adan joint hospital: The need for functional poisoning control centre in Kuwait

Poisoning is a major global health concern. Every year, unintentional poisoning contributes to 106,683 deaths globally. In Kuwait, paediatric poisoning cases comprise approximately 50% of total poisoning cases. Despite the extensive importance and the long history of poison control centres (PCCs) and the emphasis of the World Health Organization (WHO) to establish a PCC in Kuwait, no functional PCC exists in Kuwait. Here we reported 82 poisoning cases between July and December 2020, revealing a 100% increase in comparison to the official figures published in 2004 and 2005. No fatalities were reported, and all cases were discharged home within 12 h of their visit to the casualty. Children aged 2 to < 4 years comprised the most reported poisoning cases with approximately 45% of the total. The number of male child poisoning cases was approximately two-fold of female children. The most common poisoning agent was silica gel granules (9%) followed by medicines – reported as paracetamol (7%), diclofenac (7%), multivitamin gummies (7%) and vitamin C (5%). Among other causes of poisoning were ingestion of salbutamol nebulizer solution (4%), oral contraceptives and insecticides (4%). These findings reveal the importance of establishing a functional PCC in Kuwait to minimise the unnecessary visits following ingestion of expired orange juice and henna, that may encounter further contraction of infections, especially with the current state of the COVID-19 pandemic. Moreover, a functional PCC would provide comprehensive data and hence further intervention such as shifting the dosage form of salbutamol from nebulizer solution to metered dose inhaler with a spacer, in addition to increasing public awareness towards minimizing such a dramatic increase in casualty visits because of -suspected poisoning.     

Comparison of poison exposure data: NHIS and TESS data

OBJECTIVE: To identify age-adjusted poisoning episode rates, and poison control center contacts due to poisonings in children under 6 years old based on 1997-1999 National Health Interview Survey data; and compare findings with 1997-1999 Toxic Exposure Surveillance System data. METHODS: Secondary analysis of National Health Interview Survey poisoning episode data for children 5 years and younger. Respondents were asked about poison exposures during the previous 3 months. RESULTS: Based on National Health Interview Survey population weighted data there were 196/10,000 poisonings to young children < 6 years. These exposures resulted primarily from harmful solid or liquid substances. A poison control center was called in 86% of exposures to children < 4 years, but only in 70% of the 4-5 year old exposures. The odds of a poison control center not being called were 3.2 times greater for 4-5 year olds (compared to < or = 3 years) and 4.5 times greater for African-American (compared with White-Americans). Comparison of National Health Interview Survey data with data in the 1997-1999 Annual Reports of the Toxic Exposure Surveillance System revealed the number of estimated exposures in the National Health Interview Survey data were approximately half those reported in the Toxic Exposure Surveillance System data. In both datasets, children 1-2 years of age had the highest percent of poisoning exposures. CONCLUSIONS: Using multiple datasets to explore poisoning rates in young children provides a broader perspective. Differences in findings reflect divergent data collection methods and biases inherent in each database. Although the majority of National Health Interview Survey respondents reporting contacting a poison control center for a poisoning exposure, rates are lower in specific subgroups indicating a need for targeted educational efforts.     

Differences in clinical predictors of influenza in adults and children with influenza-like illness

Influenza contributes significantly to morbidity and mortality in the winter season. The aim of the study was to identify clinical signs and symptoms most predictive of influenza infection in children and adults with influenza-like illness. A prospective systematic sampling analysis of clinical data collected through sentinel surveillance system for influenza in 32 primary care centers and one tertiary care hospital in Slovenia during two consecutive influenza seasons (2004/2005 and 2005/2006) was carried out. Children and adults who had influenza-like illness, defined as febrille illness with sudden onset, prostration and weakness, muscle and joint pain and at least (cough, sore throat, coryza) were included and tested for influenza A and B virus, adenovirus, respiratory syncytial virus and enterovirus by RT-PCR. Clinical data were evaluated in statistical models to identify the best predictors for the confirmation of influenza for children (under age of 15) and adults. Of 1,286 patients with influenza-like symptoms in both seasons 211 were confirmed to have influenza A or B alone and compared to 780 influenza-negative patients. A fever over 38°C, chills, headache, malaise and sore eyes revealed a significant association with positive RT-PCR test for influenza virus in children. In adults, only three symptoms were significantly related to PCR-confirmed influenza infection: fever, cough and abnormal breath sounds. The stepwise logistic regression analysis showed that four symptoms predicted influenza in children: fever (38°C or more) (p=0.010), headache (p=0.030), cough (p=0.044) and absence of abnormal breathing sounds (p=0.015) with sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) of 5.1%, 98.1%, 57.1% and 80.1%, respectively. For adults, the strongest impact on influenza positivity was found for fever (p=0.008) and cough (p=0.085). The model for adults had less favorable characteristics, with sensitivity, specificity, PPV and NPV of 0%, 100%, 0% and 76.4%, respectively. Differences in clinical predictors of influenza in children compared to adults were found. The model for adults was acceptable but not a good one. The model for children was found to be more reliable than the prediction model for adults.     

Patterns of animal poisonings reported to the Texas Poison Center Network: 1998-2002

A portion of calls handled by poison centers involve poisonings of animals; however, information on such calls is limited. This study used data from poison centers in Texas collected during 1998-2002 to document the epidemiology of animal poisoning calls. There were a total of 24,467 animal poisoning calls, representing 2.0% of all calls. Dogs were affected in 87% of the calls and cats in 11%. The exposures were unintentional in 99% of the cases, occurred via ingestion in 95% and involved dermal exposure in 5% of the cases. Exposures occurred at the owner's own residence 91% of the time and were handled outside of health care facilities 61% of the time. The outcome involved no clinical effect for 60% of the cases involving dogs and 39% of the cases involving cats. Reported exposures occurred more often during the summer, and the most frequently reported exposures involved pesticides and plants. These findings were consistent with the limited reports from on poison center regarding animal poisonings.     

Mercury poisoning: prevalence,knowledge and frequency of gold panning and doing retort among alluvial gold panners in Chiweshe and Tafuna communal lands in Zimbabwe

OBJECTIVES: To estimate the prevalence of mercury poisoning, to estimate the knowledge level that mercury can be a poison, and to establish the frequency of gold panning and doing retorts. DESIGN: Cross sectional study. SETTING: Chiweshe and Tafuna communal lands. SUBJECTS: Gold panners. MAIN OUTCOME MEASURE: Mercury levels in blood and urine. RESULTS: Totals of 23 respondents from Chiweshe and 43 respondents from Tafuna were recruited. Four out of 43 respondents in Tafuna and seven out of 23 respondents in Chiweshe had levels of mercury greater than 0.05 mg/L in blood (p = 0.040). Out of 43 respondents in Tafuna, four (9.3%) had levels of mercury of more than 0.01 mg/L in urine. Totals of 18 out of 37 and seven out of 22 respondents from Tafuna and Chiweshe, respectively, did not know that mercury could be a poison. Altogether, 35 (56.5%) out of 62 respondents were full time gold panners. Significantly more respondents in Chiweshe (14/19) than in Tafuna (8/29) did less than four retorts per month (p = 0.005). Respondents who did four or more retorts per month were 3.21 (95% CI 1.06 to 9.72) times more likely to have had raised levels of mercury in their blood compared with persons who did less than four retorts per month. CONCLUSION: Mercury poisoning among gold panners in Chiweshe and Tafuna communal lands is of public health importance. Panners should be educated on the possibilities of mercury being a poison. A low cost and safe technology to separating mercury from the amalgam should be introduced to the panners.     

Adolescent poisoning: a comparison of accidental and intentional exposures

The fact that intentional drug and toxic substance use/abuse by adolescents has dramatically increased during the past 2 decades often overshadows the knowledge that adolescents also suffer accidental poisonings as well. A 1-year retrospective analysis of 1,879 poison exposures involving children 13 to 17 years of age revealed 894 (47.6%) were due to accidental circumstances and 945 (50.2%) were intentional in nature. Nonpharmaceuticals were involved in 63.5% of all accidental adolescent poisonings versus 36.5% involving various drugs. Intentional nonpharmaceutical exposures were 17.5% compared to total intentional adolescent poisonings, while 82.5% involved drugs. Site of exposure was the child's own home in 1,252 (66.7%) cases, school in 201 (10.8%), the workplace in 35 (1.9%), and other/unknown sites accounted for 387 (20.6%) poisonings. Poisoning by ingestion accounted for 1,408 (74.9%) of the adolescent exposures, inhalations 147 (7.8%), ocular 219 (11.5%), and dermal 110 (5.8%). Management at the nearest health care facility (HCF) was necessary in 1,252 (66.6%) of the poisonings versus 627 (33.4%) who were treated in non-HCF environments. Regional poison centers must be cognizant that accidental as well as intentional poisoning can occur with adolescents. Distinct viable prevention strategies should be developed to address these problems.     

Assessment of prevalence and mortality incidences due to poisoning in a South Indian tertiary care teaching hospital

WHO reports estimate poisoning as one of the most common causes of increased morbidity and mortality rate world-wide. Various agents such as pesticides, drugs have been used for intentional and accidental poisoning in different countries. In the Indian scenario, pesticides are the most commonly used poisoning agents. To assess the prevalence and mortality incidence rate due to various poisoning agents a retrospective and prospective study conducted over a period of nine months in a tertiary care teaching hospital. Retrospective data of poisoning cases was collected from the medical records section and the prospective data of poisoning cases was collected from the emergency and causality departments. A total of 1045 poisoning related admissions were identified during the period January 2005 to September 2008. Among them, 68.40% of cases were due to intentional poisoning and 31.60% were due to accidental poisoning. Of the poisoning related admissions, 84.4% of patients recovered, whereas in 7.6% of cases condition did not improve. Mortality rate was observed 4%. Intentional poisoning was observed more in male population (60.2%) in the age group of 18-29 years. Accidental poisoning was seen more in children in the age group of 1-3 years. Incidence of overall poisoning cases were high due to pesticides (39.5%) followed by medicines (26.1%), household products (22.1%), environmental poisoning (12.1%) and heavy metals (0.2%). It was observed that availability of centralised poison information centre and treatment protocols will improvise poison management practices in tertiary care hospitals by the clinicians.     

Parasuicide by self-injection of an organophosphate insecticide.

Parasuicide by ingestion of organophosphate (OP) insecticides is common in Sri Lanka, but the use of the parateral route to self administer the poison is extremely rare. We report a patient who deliberately injected herself intramuscularly with an OP compound with suicidal intent. The clinical manifestations of OP poisoning were unpredictable and posed a therapeutic problem.     

Clinical toxicology consultation by pharmacists.

The functions of pharmacists in a clinical toxicology consultation service are described. Pharmacists provided three basic services in conjunction with poisonings treated by the emergency department of a children's hospital: (1) assisted with obtaining the history and assessment of the toxicologic proglems, (2) recommended a plan for rational management, and (3) discussed poison prevention with the parents of the victims. Pharmacists were consulted for 189 poisoning cases over a six-month period; 80% of the cases were attended at the bedside and the remainder were monitored by telephone. Drugs were involved in 58% of the patient exposures. Median time for the pharmacist to reach the emergency room after the patient's arrival was 5 to 10 minutes. Physicians and nurses rated the pharmacists' contributions favorably. These results suggest that pharmacists can play an important role in clinical toxicology.     

Optimal serological tests for the detection of Helicobacter pylori infection in the Chinese population

BACKGROUND: Numerous serological tests for the detection of Helicobacter pylori infection have been developed. However, many perform poorly when evaluated in the Chinese population. AIM: To search for optimal serological tests for the detection of H. pylori infection in Chinese patients. METHODS: Consecutive dyspeptic patients referred for upper endoscopy were recruited. During endoscopy, gastric biopsies were taken for the CLOtest and histological examination. Patients were then given a 13C-urea breath test. Sera were used to test for H. pylori infection, employing three commercial enzyme-linked immunosorbent assay kits (pylori DTect, HP IgG and GAP IgG). Results were compared with the gold standard defined by the CLOtest, histology and 13C-urea breath test. RESULTS: Among the 142 patients (47 male, 95 female; mean age, 49 years) recruited, 81 (57%) were H. pylori-positive, 57 (40%) were H. pylori-negative and four (3%) were defined to be indeterminate. Using a self-defined cut-off value after calculation, the best accuracies for the pylori DTect, HP IgG and GAP IgG tests were 97%, 91% and 80%, respectively. CONCLUSIONS: The pylori DTect test is an optimal serological test for the detection of H. pylori infection in Hong Kong Chinese patients. The HP IgG test may be used as an alternative.