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目的观察新西兰兔在液化石油气中毒后不同组织的病理学特征,探讨其在日常法医鉴定工作中的应用价值。方法健康新西兰兔42只,随机分为3组:轻度中毒组6只,中毒死亡组30只,窒息死亡组6只。在中毒和致死过程中进行行为学观察,分析心血中液化石油气浓度,中毒死亡组和窒息死亡组进行大体解剖形态学和组织病理切片观察及心血检验。结果轻度中毒组在吸入少量液化石油气后会表现为呼吸加快、站立、伸舌、磨牙等兴奋的状态;中毒死亡组尸体解剖主要表现皮肤、肌肉呈土黄色,气管、支气管出血明显,肺气肿明显;中毒死亡组心血中可检验出液化石油气成分。结论新西兰兔液化石油气中毒的特征主要表现为皮肤、肌肉呈土黄色,气管、支气管出血明显,心血可检出液化石油气成分。我们推断液化石油气的神经毒性与缺氧可能是液化石油气中毒死亡的机制。 相似文献
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目的研究不同一氧化碳(carbon monoxide,CO)浓度下中毒大鼠的行为学特征、存活时间、碳氧血红蛋白(carboxyhemoglobin,HbCO)饱和度变化规律,为法医学实践中CO中毒死亡案件提供实验依据。方法将160只SD大鼠随机分为4组。自制染毒装置,使大鼠分别在CO浓度为1 250、3 750、6 250 mg/m~3及持续通入CO状态下染毒致死亡。观察不同CO浓度中毒大鼠的行为学特征,记录存活时间,采用分光光度法检测心血HbCO饱和度,并提取脑、心脏、肺、肝等器官进行组织病理学观察。结果 CO中毒大鼠的行为学特征表现为肢体瘫软、反应迟钝。随着CO浓度的升高,大鼠存活时间逐渐缩短,心血HbCO饱和度逐渐升高。在CO浓度为1 250 mg/m~3条件下,发现3例心血HbCO饱和度明显低于致死饱和度,其余各组未发现心血HbCO饱和度低于致死饱和度的情况。结论建立的不同浓度下CO中毒死亡动物模型,操作简单,重复性好,为进一步研究CO中毒及其他吸入性有毒气体的法医学研究奠定了基础。 相似文献
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从高度腐败的尸体脏器中检出液化石油气成份 总被引:1,自引:1,他引:0
液化石油气主要由低沸点的甲烷、乙烷、丙烷、丁烷、异丁烷及其他烯烃组成。由于产地和工艺不同,各组份的含量比有所不同。由于它们的沸点差异较大,很难在同一色谱条件下对所有成份进行分析。一般情况下,只对丙烷、丁烷、异丁烷进行分析。在常态下,低浓度时,液化石油气中的烃类气体对人无毒,但在高浓度时,由于烃气占据了空间,排除了氧气,使人造成缺氧而窒息死亡。随着液化石油气的广泛应用,而造成的意外事故、自杀和谋杀的案件时有发生。国外有从人体脏器中检出液化石油气成份的报导”’国内有人研究过家免各脏器中液化石油气成份… 相似文献
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目的研究CO中毒腐败血、肝组织检材中CO的HS/GC/MS检测。方法用HS/GC/MS法分析碳氧血红蛋白(COHb)血的线性范围。配制10%、30%、50%、70%浓度COHb血样,分别在室温、冷藏、冷冻条件下保存,分别在当日、第4、14、45d进行测定,比较实验结果。腐败肝组织由雄性健康家兔通CO气体致死,当天解剖,家兔肝常温隔绝空气保存并放35d至腐败,期间进行不定期顶空测定分析。结果制备的COHb血在0-100%之间有良好的线性关系Y=2.4X+2.2(r=0.9995)。以此方法测定家兔CO中毒致死的COHb新鲜血的浓度和4℃下放置45dCOHb腐败血,结果表明温度对血样中COHb%的测定影响最大。采用HS/GC/MS法检测,每次只需0.25ml血样或1g肝脏,分析一次时间只需3min,均可检测出新鲜检材和常温放置45d的腐败肝组织检材CO的含量。结论HS/GC/MS法能检出CO中毒的腐败生物检材中CO。 相似文献
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Bo Jin Ph.D. Bo Yi B.A. Qingtao Wei M.D. Linchuan Liao Ph.D. 《Journal of forensic sciences》2019,64(3):941-945
Paraquat poisoning usually results from suicide, occupational, or accidental exposure. Herein, we report a rare fatal case of homicidal paraquat poisoning. A 58‐year‐old man was poisoned by taking paraquat‐mixed medicine and wearing paraquat‐soaked underwear. In the absence of a history of paraquat exposure, the patient was misdiagnosed with pulmonary infection and scrotal dermatitis and died of respiratory failure 24 days after the initial exposure to paraquat. Ultra‐performance liquid chromatography‐tandem mass spectrometry (UPLC‐MS/MS) was applied to detect and quantify paraquat in postmortem specimens. The concentration of paraquat in postmortem specimens from high to low is lung (0.49 μg/g), brain (0.32 μg/g), kidney (0.24 μg/g), liver (0.20 μg/g), cardiac blood (0.11 μg/mL), and stomach wall (<LOQ). Identification of homicidal paraquat poisoning is not easy for a clinician or a forensic pathologist, it is important to consider the possibility of paraquat poisoning when patients suffer from rapidly aggravating pneumonia of unknown origin. 相似文献
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Sugie H Sasaki C Hashimoto C Takeshita H Nagai T Nakamura S Furukawa M Nishikawa T Kurihara K 《Forensic science international》2004,143(2-3):211-214
We report three cases of sudden death due to inhalation of portable cooking stove fuel (case 1), cigarette lighter fuel (case 2), and liquefied petroleum gas (LPG) (case 3). Specimens of blood, urine, stomach contents, brain, heart, lung, liver, kidney, and fat were collected and analyzed for propylene, propane, isobutane, and n-butane by headspace gas chromatography. n-Butane was the major substance among the volatiles found in the tissues of cases 1 and 2, and propane was the major substance in case 3. A combination of the autopsy findings and the gas analysis results revealed that the cause of death was ventricular fibrillation induced by hard muscle exercise after gas inhalation in cases 1 and 2, and that the cause of death in case 3 might be hypoxia. It is possible that the victim in case 3 was under anesthetic toxicity of accumulated isobutane which is a minor component of liquefied petroleum gas. 相似文献
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Imbenotte M Azaroual N Cartigny B Vermeersch G Lhermitte M 《Forensic science international》2003,133(1-2):132-135
In order to analyse a wide range of xenobiotics and their metabolites present in biological fluids, NMR spectroscopy can be used. A large variety of xenobiotics (therapeutic agents, pesticides, solvents, alcohols) can be characterized and quantitated directly, without sample preparation. NMR investigations were applied to acute poisoning cases, involving drugs such as salicylates and valproic acid (VPA). In a salicylate poisoning case, the three major metabolites of acetylsalicylic acid have been detected in crude urine, and rapid identification of lysine revealed the origin of the intoxication, namely lysine acetylsalicylate (Aspegic). Valproic acid as its glucuronide was identified in urine samples from two poisoned patients. 1H NMR was also used to identify and quantitate paraquat (Gramoxone) in urine owing to its two aromatic signals at 8.49 and 9.02 ppm, in two acutely poisoned patients (183 and 93 mg/l). An intentional poisoning case with tetrahydrofuran (THF) was also investigated. Serum and urine samples were collected. THF was characterized by its resonances at 1.90 and 3.76 ppm, and quantified at 813 and 850 mg/l in the two biological fluids, respectively. Moreover, two other compounds were detected: lactate and gamma-hydroxybutyric acid (GHB). 1H NMR spectroscopic analysis of serum samples from three poisoned patients revealed methanol in one case and ethylene glycol in the two others. Moreover, in the same spectrum, the corresponding metabolites formate and glycolate were found. Compared with the reference chromatographic or spectrophotometric methods, requiring time-consuming extraction and/or derivatization steps, NMR spectroscopy allows the determination of many exogenous and endogenous compounds, without any pre-selection of the analytes. 相似文献
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OBJECTIVE: Expressions of GABA and GABA(A)R-alpha1 in the brain of rats poisoned by Tetramine were analyzed to explore the intoxication mechanism. Methods Sixty rats were randomly divided into control, sham poisoned, high-dose poisoned (1.0 mg/kg tetramine) and low-dose poisoned (0.1 mg/kg) groups. The expressions of GABA and GABA(A)R-alpha1 in the brain of the poisoned rats were detected and analyzed by immunohistochemistry and imaging analyzer. Results The expressions of both GABA and GABA(A)R-alpha1 were diffusely seen in the brains of the control and shame poisoned rat groups with a moderate expression level, whereas the expressions of both GABA and GABA(A)R-alpha1 were decreased in the brains of the high-dose poisoned group. In the low-dose poisoned rat group, the expression of GABA initially decreased and reached its lowest level 6 hours after poisoning, and then started to show an increase and reached the level of control groups at day 3. The expressions level reached its peak at days 5-7 after poisoning and remained above the level of control groups till 10 days after poisoning. Similarly, the expression of GABA(A)R-alpha1 in the brains of the low-dose poisoned group initially decreased and reached its lowest level 6-12 hrs after poisoning, and then started to increase and reached the level of control groups at days 7-10 after poisoning, respectively. Conclusion The expression of both GABA and GABA(A)R-alpha1 decreased in the brains of the high-dose poisoned rat group and these changes of GABA and GABA(A)R-alpha1 expressions may be associated with underlying mechanism of tetramine poisoning. 相似文献
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Propane was measured in specimens taken from two persons who died from a LPG explosion in an apartment using head-space-GC/FID. Because of the variation of instrument performance and sample injection, the internal standard pentane was used. Calibration standards were prepared by injecting each calculated volume of pure propane gas into capped vials containing 2 ml of blood and 5 microl of internal standard. The calibration curve revealed good linearity from 0.09 microg/ml to at least 90 microg/ml. The method validation data also included repeatability and recovery. The propane quantities in blood, fat and brain tissue were between 0.27 and 71 microg/ml (microg/g) with the highest concentration observed in fat. The confirmation of propane was conducted by the means of solid phase micro-extraction and mass spectrometry. 相似文献
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为探求安定类药物在急性中毒家兔体内的代谢分布,采用固相萃取法和HPLC同时测定氯硝安定、佳静安定和安定。家兔按一定剂量将三种药物同时灌胃造成急性中毒2小时,处死后测定血、胆汁、尿液及其它脏器的三种药物浓度。结果表明,氯硝安定在胆汁和尿中含量较高,为0.82μg/ml和0.68μg/ml,而佳静安定及安定在胆汁和肝中浓度高,分别为9.32μg/ml和13.81μg/g。提示三种药物在家兔体内分布既有相同点也有显著差别。因此,利用本方法既可同时测定三种不同药物,也可为法医检案中毒案例的最佳检材采取和毒物分析结果评价提供了科学依据。 相似文献
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Globus Pallidus Necrosis Unrelated to Carbon Monoxide Poisoning: Retrospective Analysis of 27 Cases of Basal Ganglia Necrosis 下载免费PDF全文
Nicole A. Yarid M.D. Richard C. Harruff M.D. Ph.D. 《Journal of forensic sciences》2015,60(6):1484-1487
Bilateral globus pallidus necrosis is said to be characteristic of carbon monoxide (CO) poisoning. However, there has been no scientific test of this hypothesis. To examine the assertion that globus pallidus necrosis is typical of CO poisoning, this study examined autopsy cases from the King County Medical Examiner's Office (KCMEO) between 1994 and 2013. Twenty-seven cases with bilateral basal ganglia lesions were identified and examined for associated or causative disease or injury with the following results: 10 cases of drug overdose, seven heart disease, three asphyxia, two chronic ethanolism, two Huntington-like disorder, and one case each of remote trauma, rheumatic heart disease, and cerebral artery gas embolism. Additionally, review of all known cases at KCMEO of CO poisoning found no evidence of globus pallidus or basal ganglia necrosis. Thus, this study provides no support for the assertion that globus pallidus necrosis is characteristic of CO poisoning. 相似文献