乙醇相关问题的综合探讨

本文探讨了乙醇的体内过程、乙醇造成的疾病及行为异常、酒后驾车以及血液中酒精浓度的检测方法等相关的热点和难点问题 ,提出了可供参考的观点和意见。     

乙醇、乙醛慢代谢与酒后驾车肇事

在体内乙醇代谢过程中起重要作用的酶有乙醇脱氢酶（ADH）、乙醛脱氢酶（ALDH）和细胞色素P4502E1酶（CYP2E1）,它们均具有基因多态性,不同基因型个体对乙醇的耐受性存在差别,表现为酒后的行为反应能力不同。司机若为慢代谢型,乙醇、乙醛代谢速率低下,即使少量饮酒,酒后开车也可造成交通肇事。通过对ADH、ALDH和CYP2E1基因多态性与乙醇、乙醛代谢能力的关系进行综述。     

乙醇快速检测管的研制

为了能够快速简便地检测呼气中的乙醇成份 ,以减少酒后驾车所造成的交通事故 ,我们利用化学显色反应原理 ,研制出一种乙醇快速检测管。与其它的乙醇检测器及测定方法比较 ,它具有费用低、操作简便等优点 ,可作为一种常规的交通管理和随机抽样检测的工具。     

人体内乙醇含量的检测及结果分析述评

过量饮酒已被列为世界公共卫生的主要问题之一,近4%的死亡与酒精相关[1]。酒精会刺激人的神经系统,影响人的正常行为。酒后驾车和酒后滋事已成为影响交通安全和社会和谐的一个重要因素。因此,人体内乙醇含量的检测在交通安全和法庭科学领域具有重要的意义。本文通过文献调研,对乙醇检测的样本采集与保存、检测方法及结果等进行了分析,希望能为从事乙醇检测鉴定的工作人员提供参考和帮助。     

各国酒后驾车BAC界值与处罚的比较研究

目的为我国酒后驾车立法方面的后续工作提供参考与借鉴。方法对不同国家酒后驾车的血液乙醇浓度界值、检测方法选择以及相应处罚等进行比较。结果目前世界各国此方面立法的变化趋势为:(1)1BAC界值普遍下降。(2)对不同驾驶员的具体BAC值作出不同规定。(3)对酒后驾车的处罚越来越严厉。结论建议我国有关立法机构:(1)广泛开展道路交通安全教育;(2)规定最小饮酒年龄和驾车年龄;(3)对不同驾驶员规定不同的BAC酒后驾车和醉酒驾车界值;(4)政府给交警部门配备合适的检测仪器;(5)加大处罚力度。     

急性乙醇中毒者体内乙醇动力学研究

根据乙醇在体内的代谢动力学特点,本文建立了研究急性乙醇中毒者血液乙醇动力学数学模型,其表达式为:x(t)=x_0(1-e-~(kat))-k_bt。从该数学模型可求得乙醇在体内的吸收速率常数(K_a)和消除速率常数(K_b),从而可以获得体内乙醇浓度动态变化曲线。所以,饮用乙醇饮料后的时刻乙醇浓度(x(t))均可由曲线中查得。实验研究证实,以该数学模型导出的参数与实验获得的结果相一致。     

血、尿中乙醇含量的测定及其评价

在法医学非正常死亡的尸体检验以及酒后驾车肇事的司法鉴定中,测定尸体或活体血液、尿液中的乙醇含量,推测案发时血液乙醇浓度对于判断其中毒程度和死亡原因,具有重要意义。近年来,对乙醇的吸收、代谢、测定等的法医学研究,国外已有很多文献报导:而国内对此研究甚少。因此,     

贵州省 1 000 例涉嫌酒后驾驶者的鉴定结果分析

目的通过对贵州省2012年1000例涉嫌酒后驾驶、道路交通事故酒精检案的特点进行分析,为预防和控制酒后驾车提供科学数据。方法在利用Excel及Spss统计软件对涉嫌交通事故肇事者性别、年龄、肇事时间、肇事车型以及对肇事者血中乙醇质量浓度（BAC）等数据进行统计分析。结果涉嫌酒后驾驶者男性居多,年龄在20~50岁间占92%。事故多发生于20~24时,以县市区干道为主,肇事车辆为摩托车占46.72%。在1000例乙醇检案中,28.7%为未检出,9.3%为酒后驾车,59.5%为醉酒驾车。结论 2012年贵州省发生的1000例涉嫌酒后驾驶案件中有一定相关特征,可为＂酒驾＂的预防与控制提供准确的科学依据。     

涉嫌酒后驾驶交通事故人体损伤与驾驶员血中乙醇质量浓度关系研究

目的探讨涉嫌酒后驾驶所致道路交通事故中人体损伤情况与驾驶员血中乙醇质量浓度关系,为预防、控制道路交通事故及人体损伤提供依据。方法对467例涉嫌酒后驾驶机动车的道路交通事故损伤人员相关鉴定资料与肇事驾驶员血中乙醇质量浓度进行系统分析性研究。结果涉嫌酒后驾驶发生道路交通事故的损伤人员中,以20~39岁男性居多;事故中驾驶员损伤机率最高;酒后交通事故以长头小车及摩托车最多,而驾驶员血中乙醇质量浓度（BAC）为0.1~20mg/100mL浓度的摩托车驾乘人员伤亡构成比最高;酒后驾驶机动车肇事导致的人体致命性损伤及人员死亡的饮酒组危险程度均高于未饮酒组,在驾驶员血中乙醇质量浓度（BAC）为0.1~20mg/100mL组与20.1~80mg/100mL组比较无明显差异。结论酒后驾驶肇事导致的人员伤亡比未饮酒驾车交通事故严重;未达酒后驾车组（BAC为0.1~20mg/100mL）和酒后驾车组（BAC为20.1~80mg/100mL）交通事故导致的人员伤亡无明显差异。研究结果提示,应降低饮酒后驾车血中乙醇质量浓度（BAC）法定标准阈值,进一步控制和减少道路交通事故人身伤亡率。     

血、尿中乙醇含量的测定及其评价——Ⅱ，按中国习惯饮酒后体内乙醇血浓和尿浓的变化

无论在东、西方,许多人喜欢饮用酒精饮料,作为法庭毒物学工作者常常需要测定活体或尸体中的乙醇含量,并在各种案件中,如交通事故,凶杀案件等,对乙醇在该案中所起的作用作出解释和推断。这一要求即迫使法庭毒物学者需要由测定的浓度和案件的时间来估计案发当时的乙醇大致含量,所以了解乙醇在体内含量的变化是十分必要     

The rate and kinetic order of ethanol elimination

The rate and kinetic order of ethanol elimination was evaluated in human volunteers. Part I of the study involved dosing individuals with alcoholic beverages on two separate occasions. Breathalyzer tests were performed at 15-min intervals for a period of 5 h. Attention was focused on values obtained after peak blood ethanol levels had been reached. The second part of the study included having samples drawn from alcoholics at predetermined intervals during recovery from alcoholic intoxication. Blood ethanol concentration data was analyzed for kinetic order and a comparison of ethanol elimination rates of alcoholics and non-alcoholics was made. The predicative capability of estimating a BAC from both the zero and first order theories was also investigated.It was concluded that ethanol elimination is a zero order process. For subjects classified as non-drinkers (consume less than 6 ounces of ethanol/month), the mean ethanol elimination rate as determined in the study was 12 ± 4 mg/h. For subjects classified as social drinkers (consume more than 6 ounces but less than 30 ounces of ethanol/month), the mean ethanol elimination rate was 15 ± 4 mg%/h, and for alcoholics, the mean ethanol elimination rate was 30 ± 9 mg%/h. These results indicate that the rate of ethanol elimination increases with drinking experience.     

Comparison of the analytical capabilities of the BAC Datamaster and Datamaster DMT forensic breath testing devices

The State of Michigan uses the Datamaster as an evidential breath testing device. The newest version, the DMT, will replace current instruments in the field as they are retired from service. The Michigan State Police conducted comparison studies to test the analytical properties of the new instrument and to evaluate its response to conditions commonly cited in court defenses. The effects of mouth alcohol, objects in the mouth, and radiofrequency interference on paired samples from drinking subjects were assessed on the DMT. The effects of sample duration and chemical interferents were assessed on both instruments, using drinking subjects and wet-bath simulators, respectively. Our testing shows that Datamaster and DMT results are essentially identical; the DMT gave accurate readings as compared with measurements made using simulators containing standard ethanol solutions and that the DMT did not give falsely elevated breath alcohol results from any of the influences tested.     

腐败血液中自生醇现象及法医学应用研究

目的检测分析腐败血液中乙醇、甲醇等物质的生成过程,为正确判断案发时人血液中醇类物质的实际浓度提供实验依据。方法以正常健康人血液制作腐败样本,分别模拟人死亡后正常人血液和糖尿病人高糖血液的腐败过程,借助顶空气相色谱仪测定两种血液腐败后醇/醛类物质的生成情况并对比含量差异。结果相同实验条件下,高糖血液较正常健康血液更早腐败产生乙醇,但前者乙醇浓度低于后者;血液腐败过程中还会产生乙醛、甲醇、异丙醇、正丙醇等物质,其中正丙醇含量与乙醇生成量存在一定相关性。结论血液腐败能够产生乙醇、甲醇等多种物质。研究还为糖尿病人血液腐败产生醇类物质的差异性评价提供了依据。     

Ethanol stability in unpreserved refrigerated antemortem blood

Ethanol stability in preserved antemortem blood has been widely studied since it is a common practice in cases involving suspected impaired driving to collect antemortem blood in evacuated blood tubes containing sodium fluoride. In some situations, antemortem blood is submitted to a forensic laboratory for ethanol analysis in evacuated blood tubes that contain only an anticoagulant. There has been limited research on ethanol stability in antemortem blood stored without a preservative. On two occasions, antemortem blood was collected from five ethanol-free individuals into 6-ml Vacutainer® tubes containing only 10.8 mg potassium EDTA. The blood tubes were spiked with ethanol to approximately either 0.08 or 0.15 g/dl. Dual-FID headspace gas chromatography was used to analyze 58 blood tubes, 29 from each session, for ethanol 1 day after sample collection and again after 1 year of refrigerated storage (~4°C). Statistically significant decreases in ethanol were detected at the 0.05 level of significance. Mean decreases in ethanol after 1 year of storage for the 0.08 and 0.15 g/dl samples were 0.013 and 0.010 g/dl, respectively. The mean ethanol decrease across all tubes was 0.012 g/dl. The range of decreases for the 58 blood tubes was 0.003–0.018 g/dl. The mean ethanol decreases measured in this unpreserved antemortem blood are comparable in magnitude to those previously observed in antemortem blood containing sodium fluoride after 1 year of refrigerated storage. Ethanol did not increase in the antemortem blood samples despite the absence of sodium fluoride.     

A pharmacokinetic study of ethyl glucuronide in blood and urine: applications to forensic toxicology

This pharmacokinetic study investigated the kinetics of ethanol and its metabolite ethyl glucuronide (EtG) in blood and urine during the whole time course of absorption and elimination. There are few previous studies on the kinetics of EtG in blood, and we wanted to evaluate whether such knowledge could yield valuable information regarding the time of ethanol ingestion in forensic cases, such as, for instance, drunk driving. Ten male volunteers consumed ethanol at a fixed dose of 0.5 g/kg body weight in a fasted state. Blood samples were collected for 14 h and urine samples were collected for 45-50 h after the start of drinking. EtG reached its maximum concentration (C(max)) in blood after a median of 4 h (range 3.5-5), a median of 3 h (range 2-4.5) after C(max) for ethanol. The ethanol-to-EtG ratios in blood (ethanol in g/L, EtG in mg/L) were >1 only for the first median 3.5 h (range 2.5-3.5) after drinking. EtG elimination occurred with a median half-life of 2.2 h (range 1.7-3.1 h), and the renal clearance was 8.32 L/h (median, range 5.25-20.86). The concentrations of EtG were always much higher in urine than in blood. The total amount of EtG excreted in the urine was median 30 mg (range 21.5-39.7), representing 0.017% (median, range 0.013-0.022) of the ethanol given, on a molar basis. The information from the present study may be a valuable supplement to determine the time of ethanol ingestion. For this purpose, two subsequent increasing EtG values and a high ethanol-to-EtG ratio in blood would support information of recent drinking.     

运用神经行为测试系统评价酒后行为功能的可行性研究

目的研究运用神经行为测试系统评价酒后行为功能的可行性。方法采用汉化第三版计算机化神经行为评价系统(NES-C3),通过自身对照的方式,对49名饮酒者进行神经行为功能的测试,并与步行回转试验进行比较。结果心算、视觉保留、线条判断和数字筛选均在酒后0.5￣2.5h的时间点上能力指数有所下降,视简单反应时能力指数下降则延续至酒后5.5h;步行回转在酒后0.5￣2.5h间有阳性案例。血中酒精质量浓度在0.50mg/mL以上,视觉保留、线条判断及视简单反应时的能力指数有明显下降;血中酒精质量浓度在0.80mg/mL以上,心算和数字筛选的能力指数有明显下降。步行回转实验的阳性人数在血中酒精质量浓度0.50mg/mL以上有明显增加。结论计算机化神经行为评价系统作为一个定量指标,可反应酒精质量浓度与神经行为功能的关系,且比步行回转试验更客观、更灵敏。     

驾驶员酒后血液酒精含量与时间关系研究

目的研究驾驶员少量饮酒后体内酒精含量与时间的变化关系。方法利用呼吸式测酒器对驾驶员酒后30min以后血液酒精含量进行测量,每隔20-30min测量一次,绘出血液酒精含量与时间的关系曲线。结果血液酒精含量与时间的变化关系基本为线性关系,拟合曲线斜率略有差异。结论对于喝1瓶啤酒的情况,酒后30-60min内都降到20mg/100ml以下,可为驾驶员掌握酒后开车时间和交警执法检查提供数据参考。     

Testing Antemortem Blood for Ethanol Concentration from a Blood Kit in a Refrigerator Fire

The stability of ethanol in antemortem blood stored under various conditions has been widely studied. Antemortem blood samples stored at refrigerated temperature, at room temperature, and at elevated temperatures tend to decrease in ethanol concentration with storage. It appears that the stability of ethanol in blood exposed to temperatures greater than 38°C has not been evaluated. The case presented here involves comparison of breath test results with subsequent analysis of blood drawn at the time of breath testing. However, the blood tubes were in a refrigerator fire followed by refrigerated storage for 5 months prior to analysis by headspace gas chromatography. The subject’s breath was tested twice using an Intoxilyzer 8000. The subject’s blood was tested in duplicate using an Agilent headspace gas chromatograph. The measured breath ethanol concentration was 0.103 g/210 L and 0.092 g/210 L. The measured blood ethanol concentration was 0.0932 g/dL for both samples analyzed. Although the mean blood test result was slightly lower than the mean breath test result, the mean breath test result was within the estimated uncertainty of the mean blood test result. Even under the extreme conditions of the blood kit being in a refrigerator fire, the measured blood ethanol content agreed well with the paired breath ethanol test.     

Effect of hair care and hair cosmetics on the concentrations of fatty acid ethyl esters in hair as markers of chronically elevated alcohol consumption

Fatty acid ethyl esters (FAEE) can be used as alcohol markers in hair. It was investigated in this study whether this diagnostic method is disturbed by hair care and hair cosmetics. Traces of ethyl myristate, ethyl palmitate, ethyl oleate and ethyl stearate were detected in all of 49 frequently applied hair care products by headspace solid phase microextraction (HS-SPME) and gas chromatography-mass spectrometry (GC-MS). The highest concentration was 0.003% in a hair wax. From experiments with separated hair samples of alcoholics as well as from the evaluation of the FAEE concentrations and the data about hair care of 75 volunteers (alcoholics, social drinkers and teetotalers) follows that usual shampooing, permanent wave, dyeing, bleaching or shading are of minor importance as compared to the drinking amount and other individual features. However, false positive results were found after daily treatment with a hair lotion containing 62.5% ethanol, with a deodorant and with a hair spray. As an explanation, it is assumed that FAEE are formed in the sebum glands also after regular topical application of products with a higher ethanol content.     

Time-Varying Risk Factors for Reassault Among Batterer Program Participants

This study uses longitudinal data to identify risk markers for reassault among batterer program participants. Data are from 308 men and their partners collected at five, 3-month intervals. Time-varying situational and behavioral risk factors, as well as time-invariant individual characteristics, are examined. The most influential risk markers, in terms of relative risk and level of statistical significance, were time-varying: 2 measures of the man's drunkenness during the follow-up interval in which the reassault occurred (OR: 3.5-16.3; p > .0005). Other included time-varying batterer characteristics had no significant effect on reassault. Two significant time-invariant batterer risk factors were (1) severe psychopathology and (2) a history of non-domestic-violence arrest, both measured at intake. Results suggest that batterers' drinking behavior after program intake may provide an important and easily observed marker for risk of reassault and that prediction of reassault with individual risk factors at program intake remains problematical.