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forensic toxicology

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https://www.readbyqxmd.com/read/28102586/creatinine-in-urine-a-method-comparison
#1
Marc Luginbühl, Wolfgang Weinmann
Drug screening in urine is widely applied in forensic toxicology. Contrary to blood analysis, excessive or reduced fluid intake can substantially alter the concentration of substances in urine. As a standard to detect urinary dilution, creatinine concentrations are analyzed. A sample with a concentration below 20 mg/dL is generally defined as too diluted to provide a valid result in abstinence control samples. This work investigates the potential of three different methods for the determination of creatinine concentrations in urine samples: A ZIC-HILIC based LC-MS/MS method, a spectrophotometric method on an AU 480 chemistry system, and a portable, immunoassay based point-of-care testing device was compared by measuring 200 urine samples...
January 19, 2017: Drug Testing and Analysis
https://www.readbyqxmd.com/read/28091985/frequency-of-forensic-toxicological-analysis-in-external-cause-deaths-among-nursing-home-residents-an-analysis-of-trends
#2
Georgia Aitken, Briony Murphy, Jennifer Pilgrim, Lyndal Bugeja, David Ranson, Joseph Elias Ibrahim
There is a paucity of research examining the utility of forensic toxicology in the investigation of premature external cause deaths of residents in nursing homes. The aim of this study is to describe the frequency and characteristics of toxicological analysis conducted in external cause (injury-related) deaths amongst nursing home residents in Victoria, Australia. This study was a retrospective cohort study examining external cause deaths among nursing home residents during the period July 1, 2000 to December 31, 2012 in Victoria, Australia, using the National Coronial Information System (NCIS)...
January 16, 2017: Forensic Science, Medicine, and Pathology
https://www.readbyqxmd.com/read/28091758/-deaths-from-propofol-abuse-survey-of-institutes-of-forensic-medicine-in-germany-austria-and-switzerland
#3
C Maier, J Iwunna, M Tsokos, F Mußhoff
Previous references suggesting a high mortality of propofol addiction in medical personnel were mostly based on surveys of the heads of medical departments or case reports; therefore, a questionnaire was sent to 48 forensic medicine departments in Germany, Austria and Switzerland concerning the number of autopsies carried out between 2002-2112 on medical personnel with the suspicion of abuse of propofol or other analgesics. The response rate was 67%. In 16 out of the 32 responding departments 39 deaths (27 males) were observed with previous connections to anesthesiology, intensive care or emergency departments of which 22 were physicians, 13 nurses, 2 other personnel and 2 were unknown...
January 13, 2017: Der Anaesthesist
https://www.readbyqxmd.com/read/28089299/the-non-sense-of-routinely-analysing-beta-hydroxybutyric-acid-in-forensic-toxicology-casework
#4
Nele Sadones, Willy E Lambert, Christophe P Stove
Beta-hydroxybutyric acid (BHB) is a ketone body which is generated from fatty acids as an alternative energy source when glucose is not available. Determination of this compound may be relevant in the forensic laboratory as ketoacidosis - an elevated level of ketone bodies - may contribute to the cause of death. In this study, we aimed at determining the relevance of routinely implementing BHB analysis in the forensic toxicological laboratory, as BHB analysis typically requires an additional workload. We therefore performed an unbiased retrospective analysis of BHB in 599 cases, comprising 553 blood, 232 urine and 62 vitreous humour samples...
January 7, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28088044/dried-haematic-microsamples-and-lc-ms-ms-for-the-analysis-of-natural-and-synthetic-cannabinoids
#5
Michele Protti, James Rudge, Angelo Eliseo Sberna, Gilberto Gerra, Laura Mercolini
Synthetic cannabinoids are new psychoactive substances (NPS) with similar effects when compared to natural ones found in Cannabis derivatives. They have rapidly integrated into the illicit market, often sold as alternatives under international control. The need to identify and quantify an unprecedented and growing number of new compounds represents a unique challenge for toxicological, forensic and anti-doping analysis. Dried blood spots have been used within the bioanalytical framework in place of plasma or serum, in order to reduce invasiveness, lower sample size, simplify handling, storage and shipping of samples and to facilitate home-based and on-field applications...
December 30, 2016: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28074670/metabolism-of-psilocybin-and-psilocin-clinical-and-forensic-toxicological-relevance
#6
Ricardo Jorge Dinis-Oliveira
Psilocybin and psilocin are controlled substances in many countries. These are the two main hallucinogenic compounds of the "magic mushrooms" and both act as agonists or partial agonists at 5-hydroxytryptamine (5-HT)2A subtype receptors. During the last few years, psilocybin and psilocin have gained therapeutic relevance but considerable physiological variability between individuals that can influence dose-response and toxicological profile has been reported. This review aims to discuss metabolism of psilocybin and psilocin, by presenting all major and minor psychoactive metabolites...
January 11, 2017: Drug Metabolism Reviews
https://www.readbyqxmd.com/read/28063588/the-united-kingdom-and-ireland-association-of-forensic-toxicologists-establishing-best-practice-for-professional-training-development-in-forensic-toxicology
#7
Simon Cosbey, Simon Elliott, Sue Paterson
The current status of forensic toxicology in the United Kingdom is discussed with an emphasis on professional training and development. Best practice is proposed using a blend of modular foundation knowledge training, continuing professional development, academic study, research & development and ongoing analytical practice. The need for establishing a professional career structure is also discussed along with a suggested example of a suitable model. The issues discussed in this paper are intended to provoke discussion within the forensic toxicology community, industry regulators and other government bodies responsible for the administration of justice...
January 2017: Science & Justice: Journal of the Forensic Science Society
https://www.readbyqxmd.com/read/28063329/determination-of-ethyl-glucuronide-in-human-hair-samples-a-multivariate-analysis-of-the-impact-of-extraction-conditions-on-quantitative-results
#8
Alexander Mueller, Hilke Jungen, Stefanie Iwersen-Bergmann, Lars Raduenz, Susanne Lezius, Hilke Andresen-Streichert
BACKGROUND: Ethyl glucuronide (EtG), a minor metabolite of ethanol, is used as a direct alcohol biomarker for the prolonged detection of ethanol consumption. Hair testing for EtG offers retrospective, long-term detection of ethanol exposition for several months and has gained practical importance in forensic and clinical toxicology. Since quantitative results of EtG hair testings are included in interpretations, a rugged quantitation of EtG in hair matrix is important. As generally known, sample preparation is critical in hair testing, and the scope of this study was on extraction of EtG from hair matrix...
December 19, 2016: Forensic Science International
https://www.readbyqxmd.com/read/28063270/identification-and-analytical-characterization-of-six-synthetic-cannabinoids-nnl-3-5%C3%A2-f-npb-22-7%C3%A2-n-5%C3%A2-f-akb-48-7%C3%A2-n-5%C3%A2-f-edmb-pinaca-emb-fubinaca-and-eg-018
#9
Cuimei Liu, Wei Jia, Zhendong Hua, Zhenhua Qian
Clinical and forensic toxicology laboratories are continuously confronted by analytical challenges when dealing with the new psychoactive substances phenomenon. The number of synthetic cannabinoids, the chemical diversity, and the speed of emergence make this group of compounds particularly challenging in terms of detection, monitoring, and responding. Three indazole 7 N positional isomer synthetic cannabinoids, two ethyl 2-amino-3-methylbutanoate-type synthetic cannabinoids, and one 9H-carbazole substituted synthetic cannabinoid were identified in seized materials...
January 7, 2017: Drug Testing and Analysis
https://www.readbyqxmd.com/read/28057371/3-meo-pcp-intoxication-in-two-young-men-first-in-vivo-detection-in-italy
#10
Elisabetta Bertol, Jennifer Pascali, Diego Palumbo, Valeria Catalani, Maria Grazia Di Milia, Alessia Fioravanti, Francesco Mari, Fabio Vaiano
3-MeO-PCP or 3-methoxyphencyclidine is a derivative of phencyclidine. It acts as a dissociative anesthetic and it has allegedly hallucinogenic and sedative effects. There are almost no documented intoxication cases and references about its pharmacology and toxicity in literature. This study presents two concomitant intoxication cases due to consumption of 3-MeO-PCP and alcohol. A 19 (A) and a 21 years old (B) men were brought to Santa Maria Nuova Hospital in a comatose state (Glasgow score 3). They showed respiratory acidosis, right anisocoria with mydriatic pupils and hypothermia...
December 26, 2016: Forensic Science International
https://www.readbyqxmd.com/read/28050997/mortality-among-homeless-women-who-remain-unclaimed-after-death-an-insight
#11
Aayushi Garg, Chittaranjan Behera, Saurav Chopra, D N Bhardwaj
BACKGROUND: Some homeless people remain unclaimed after death. Although women constitute a minor proportion among the homeless, they represent a more vulnerable section. We reviewed the major autopsy characteristics and causes of death among women whose bodies remained unclaimed after death. METHODS: We analysed the autopsy records and inquest papers of unclaimed bodies of women for the period 2006-12 at the Department of Forensic Medicine and Toxicology, All India Institute of Medical Sciences, New Delhi...
July 2016: National Medical Journal of India
https://www.readbyqxmd.com/read/28012128/death-of-a-seven-month-old-child-in-a-washing-machine-a-case-report
#12
Antonio Osculati, Silvia Damiana Visonà, Laura Re, Marta Sozzi, Francesca Castelli, Luisa Andrello, Claudia Vignali
The authors present a case which brings out a unique modality of child homicide by placing the baby in a washing machine and turning it on. The murder was perpetrated by the baby's mother, who suffered from a serious depressive disorder. A postmortem RX and then a forensic autopsy were performed, followed by histologic examinations and toxicology. On the basis of the results of the autopsy, as well as the histology and the negative toxicological data, the cause of death was identified as acute asphyxia. This diagnosis was rendered in light of the absence of other causes of death, as well as the presence of typical signs of asphyxia, such as epicardial and pleural petechiae and, above all, the microscopic examinations, which pointed out a massive acute pulmonary emphysema...
December 24, 2016: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/27994083/hair-analysis-in-clinical-and-forensic-toxicology
#13
Trevor Maze
No abstract text is available yet for this article.
December 2016: Occupational Medicine
https://www.readbyqxmd.com/read/27988881/rapid-analysis-of-drugs-of-abuse-and-their-metabolites-in-human-urine-using-dilute-and-shoot-liquid-chromatography-tandem-mass-spectrometry
#14
Tae Yeon Kong, Ju Hyun Kim, Jin Young Kim, Moon Kyo In, Kyung Ho Choi, Hee Seung Kim, Hye Suk Lee
Liquid chromatography-tandem mass spectrometric method for analysis of 113 abuse drugs and their metabolites in human urine was developed and validated. A simple sample clean-up procedure using the "dilute and shoot" approach, followed by reversed phase separation, provided a fast and reliable method for routine analysis. Drugs were separated in a Capcell Pak MG-III C18 column using a gradient elution of 1 mM ammonium formate with 0.1% formic acid in water and acetonitrile. The total time for analysis was 32 min...
December 17, 2016: Archives of Pharmacal Research
https://www.readbyqxmd.com/read/27932047/disturbances-of-glucose-metabolism-associated-with-the-use-of-psychotropic-drugs-a-post-mortem-evaluation
#15
Cristian Palmiere, Marc Augsburger, Vincent Varlet
Treatment with atypical antipsychotic agents and tetracyclic antidepressants has been associated with impaired glycemic control. Reported complications have included new-onset diabetes mellitus, life-threatening diabetic ketoacidosis and, rarely, death. The study presented herein focuses on biochemical investigations of glucose metabolism in a series of medico-legal cases that revealed the presence of atypical antipsychotic agents (clozapine, olanzapine, quetiapine and risperidone) or mirtazapine at toxicology...
December 5, 2016: Forensic Science International
https://www.readbyqxmd.com/read/27916403/stability-of-synthetic-cathinones-in-oral-fluid-samples
#16
Briana Miller, Jiyoung Kim, Marta Concheiro
Synthetic cathinones are new stimulant drugs derived from cathinone that have been sold as "legal highs" worldwide. These compounds can elicit powerful effects such as delusions, hallucinations as well as other potentially dangerous behavior. New analogs with varying effects and potencies are constantly introduced in the market to evade legislation, and they are not detected by routine screening and confirmation methods. Oral fluid is an alternative matrix of increasing interest in forensic toxicology. Its collection is non-invasive and easily supervised, and positive drug findings typically reflect recent drug exposure...
December 1, 2016: Forensic Science International
https://www.readbyqxmd.com/read/27915431/time-dependent-postmortem-redistribution-of-morphine-and-its-metabolites-in-blood-and-alternative-matrices-application-of-ct-guided-biopsy-sampling
#17
Sandra N Staeheli, Dominic Gascho, Lars C Ebert, Thomas Kraemer, Andrea E Steuer
Interpretation of postmortem morphine concentrations in forensic toxicology provides several pitfalls such as missing information on tolerance, analyte stability, or postmortem redistribution (PMR). Recently, it had been shown that computed tomography (CT)-guided collection of biopsies using a robotic arm (virtobot) provides a valuable strategy for systematic studies on time-dependent PMR. Using this technique, time-dependent PMR of morphine and its metabolites was investigated in 12 cases. At admission to the institute (t1), femoral and heart blood (right ventricle) as well as biopsies from the right lung, the right kidney, liver, spleen, and muscle tissue were collected...
December 3, 2016: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/27914552/preserved-brains-from-the-spanish-civil-war-mass-grave-1936-at-la-pedraja1-burgos-spain
#18
Fernando Serrulla, Lourdes Herrasti, Carmen Navarro, Jose Luis Cascallana, Ana Maria Bermejo, Nicholas Marquez-Grant, Francisco Etxeberria
During the excavation of the Spanish Civil War mass grave at La Pedraja (Burgos, Spain), 104 individuals were found interred within it, 45 of which displayed brains that were preserved but dehydrated and reduced in size. This exceptional finding has resulted in the formation of a multidisciplinary team, with the aim of obtaining as much information as possible and to primarily understand the taphonomic phenomena that has led to the preservation of these brains. The following types of analyses were undertaken on three of these brains: macroscopy, histology, radiology, chemical-toxicology, genetics, chemical analysis of the soil and 3D modelling for stereolithography...
December 2016: Science & Justice: Journal of the Forensic Science Society
https://www.readbyqxmd.com/read/27899215/toxicology-in-international-drug-control-prioritizing-the-most-harmful-persistent-and-prevalent-substances
#19
Susan C Ifeagwu, Martin Raithelhuber, Conor Crean, Dimitri Gerostamoulos, Heesun Chung, Justice N Tettey
The nature of the global drugs market has evolved rapidly and has become more complex with the emergence of new psychoactive substances (NPS), some of which have been associated with increased abuse, hospital emergency admissions and sometimes fatalities. NPS are characterized by geographic heterogeneity, with some only transient in nature and others not satisfying the criteria for harm required for international control. Consequently, a pragmatic response of the international community is to prioritize the most harmful, persistent and prevalent substances for action - an objective, which is hampered by the paucity of data on harms...
November 20, 2016: Forensic Science International
https://www.readbyqxmd.com/read/27890104/an-autopsy-case-of-spontaneous-esophageal-perforation-boerhaave-syndrome
#20
Kaori Kimura-Kataoka, Junko Fujihara, Satsuki Kurata, Yoshikazu Takinami, Ken Inoue, Toshihiro Yasuda, Haruo Takeshita
A 45-year-old male, an alcohol addict with asthma, was found dead in his home, after several days of continued drinking. A forensic autopsy was performed 3days after the discovery of his death in order to specify the cause of death. A longitudinal perforation penetrating all layers of the esophagus measuring 1.8cm was present on the left wall approximately 2.0cm from the gastroesophageal junction. There were 1900mL of greenish to brownish turbid liquid in the left pleural cavity and 150mL of greenish viscous liquid in the stomach...
November 2016: Legal Medicine
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