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forensic toxicology

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https://www.readbyqxmd.com/read/28292561/dried-blood-spots-combined-to-an-uplc-ms-ms-method-for-the-simultaneous-determination-of-drugs-of-abuse-in-forensic-toxicology
#1
Susana Sadler Simões, Antonio Castañera Ajenjo, Mário João Dias
A method for the simultaneous determination of 11 illicit drugs, using the dried blood spot (DBS) sampling technique combined with the UPLC-MS/MS technology was developed to study its applicability within the forensic toxicology. The DBS samples, prepared from a blood volume of 50μL and using the Whatman® BFC 180 bloodstain cards, were extracted with a methanol/acetonitrile mixture. The chromatographic separation was performed using an Acquity UPLC(®) HSS T3 column (100mm×2.1mm, 1.8μm) and an acetonitrile/2mM ammonium formate (0...
February 27, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28266722/development-and-validation-of-a-hplc-uv-method-for-the-simultaneous-determination-of-the-antipsychotics-clozapine-olanzapine-and-quetiapine-several-beta-blockers-and-their-metabolites
#2
Margarete Silva Gracia, Alexandra Köppl, Sandra Unholzer, Ekkehard Haen
A simple, accurate and selective column-switching high performance liquid chromatography (HPLC) method was developed and validated for simultaneous quantification of six beta-blockers (metoprolol MET, timolol TIM, bisoprolol BIS, propranolol PRO, carvedilol CAR and nebivolol NEB), three of their metabolites (α-hydroxy metoprolol α-HMET, N-desisopropyl propranolol DIPRO and 4'-hydroxy carvedilol 4-HCAR), three antipsychotics (olanzapine OLA, clozapine CLO and quetiapine QUE) and three of their metabolites (N-desmethyl olanzapine DMOLA, N-desmethyl clozapine DMCLO and N-desalkyl quetiapine DAQUE) in human serum...
March 7, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/28262446/separation-of-ortho-meta-and-para-isomers-of-methylmethcathinone-mmc-and-methylethcathinone-mec-using-lc-esi-ms-ms-application-to-forensic-serum-samples
#3
Alexandra Maas, Konrad Sydow, Burkhard Madea, Cornelius Hess
Separation and identification of positional isomers is an important issue in forensic toxicology, particularly in the context of new psychoactive substances (NPS). Despite the structural similarity, positional isomers often show different pharmacological properties and thus can exhibit dramatic differences with respect to their toxicity. Additionally, besides these pharmacological and toxicological effects, the legal status is also of great importance. We present a sensitive and selective LC-MS/MS method to separate the ortho, meta and para isomers of methylmethcathinone (MMC) and methylethcathinone (MEC) using a core-shell biphenyl analytical column...
February 1, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28261791/drug-recognition-evaluation-and-chemical-confirmation-of-a-25c-nbome-impaired-driver
#4
James W Rajotte, Jean-Paul F P Palmentier, Helena Rachelle Wallage
This case report details an individual arrested for drug-impaired driving after leaving the scene of multiple motor vehicle collisions and evading police. The driver was examined by a drug recognition expert and failed the drug recognition evaluation. The driver admitted to using cocaine, marijuana, an antidepressant medication and "N-bomb," a novel psychoactive substance that possesses hallucinogenic properties. Toxicological analyses at the Centre of Forensic Sciences' Toronto laboratory revealed only the substance 2-[4-chloro-2,5-dimethoxyphenyl]-N-[(2-methoxyphenyl)methyl]ethanamine (25C-NBOMe) in the accused's urine...
March 6, 2017: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/28252613/-the-detection-and-identification-of-alpha-pyrrolidino-valerophenone-%C3%AE-pvp-and-its-metabolites-in-the-objects-of-the-forensic-chemical-examination
#5
E V Moskaleva, N N Eroshchenko, A N Kiryushin, D A Kardonsky, A A Eganov
The combined application of the IK 200609 chemical toxicological analyzer and the diagnostic biosensor (reagent) for the determination of synthetic cations (with due regard for compliance with the instruction for analysis) made it possible to detect during 15 minutes the presence of cations in the urine samples at the concentration of 376.64 ng/ml. This result was further confirmed by HPLC-Ms/MS and GH-MS. The use of the analyzer allowed the screening of the urine samples to be performed within several minutes at the preliminary stage of the study...
2017: Sudebno-meditsinskaia Ekspertiza
https://www.readbyqxmd.com/read/28245001/fatal-accidents-at-work-in-agriculture-associated-with-alcohol-intoxication-in-lower-silesia-in-poland
#6
Tomasz Jurek, Marta Rorat
BACKGROUND: Determining the prevalence of alcohol intoxication and the level of intoxication in victims of fatal occupational accidents is necessary to improve work safety. The circumstances of the accident and the time between alcohol consumption and death are important factors. MATERIAL AND METHODS: A retrospective review of 18 935 medico-legal autopsy reports and toxicological reports performed in the Department of Forensic Medicine at the Wroclaw Medical University, Poland, in the years 1991-2014...
February 28, 2017: Medycyna Pracy
https://www.readbyqxmd.com/read/28243770/sudden-aortic-death-proposal-for-a-comprehensive-diagnostic-approach-in-forensic-and-in-clinical-pathology-practice
#7
Hans H de Boer, Fabrice Dedouit, Nina Chappex, Allard C van der Wal, Katarzyna Michaud
BACKGROUNDS: Aortic rupture or dissection as immediate cause of sudden death is encountered in forensic and clinical autopsy practice. Despite a common denominator of 'sudden aortic death' (SAD), we expect that in both settings the diagnostic workup, being either primarily legal or primarily disease related, differs substantially, which may affect the eventual diagnoses. METHODS: We retrospectively reviewed case records of deceased persons who fitted a diagnosis of SAD in the continuous autopsy cohorts in a forensic (Suisse) and a clinical setting (The Netherlands)...
February 27, 2017: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/28240418/analysis-of-drugs-of-abuse-in-cerumen-correlation-of-postmortem-analysis-results-with-those-for-blood-urine-and-hair
#8
Sylvia I Meier, Sarah C Koelzer, Manfred Schubert-Zsilavecz, Stefan W Toennes
The evaluation of drug and alcohol abuse is a major subject of forensic toxicology. Assessment of drug abstinence currently requires the analysis of urine or hair. In the present study cerumen, a mixture of sebum and sweat, was tested as an alternative. Postmortem samples (blood, urine, hair and cerumen from 38 corpses) were analyzed using liquid chromatography and gas chromatography, each coupled to mass spectrometry (LC-MS, GC-MS). The results were compared. In all cases of recent drug use (i.e. detection of opiates, amphetamine and derivatives, cocaine, methadone and diazepam or their metabolites in blood) the corresponding cerumen was positive...
February 27, 2017: Drug Testing and Analysis
https://www.readbyqxmd.com/read/28212679/histopathological-study-of-cardiac-lesions-in-methamphetamine-poisoning-related-deaths
#9
Maryam Akhgari, Homeira Mobaraki, Afshar Etemadi-Aleagha
BACKGROUND: Methamphetamine abuse is a worldwide health concern. Methamphetamine causes health hazards in many vital organs. It can cause damage to cardiac tissue via catecholamines release. Methamphetamine related deaths are becoming one of the most important problems in Iran. The purpose of the present study was to determine cardiac pathology in methamphetamine poisoning-related deaths. METHODS: The study included 100 cases of methamphetamine poisoning-related deaths and 100 cases as control group...
February 17, 2017: Daru: Journal of Faculty of Pharmacy, Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/28211993/recent-lab-on-chip-developments-for-novel-drug-discovery
#10
REVIEW
Nauman Khalid, Isao Kobayashi, Mitsutoshi Nakajima
Microelectromechanical systems (MEMS) and micro total analysis systems (μTAS) revolutionized the biochemical and electronic industries, and this miniaturization process became a key driver for many markets. Now, it is a driving force for innovations in life sciences, diagnostics, analytical sciences, and chemistry, which are called 'lab-on-a-chip, (LOC)' devices. The use of these devices allows the development of fast, portable, and easy-to-use systems with a high level of functional integration for applications such as point-of-care diagnostics, forensics, the analysis of biomolecules, environmental or food analysis, and drug development...
February 17, 2017: Wiley Interdisciplinary Reviews. Systems Biology and Medicine
https://www.readbyqxmd.com/read/28207195/increasing-the-linear-dynamic-range-in-lc-ms-is-it-valid-to-use-a-less-abundant-isotopologue
#11
Stephen Trobbiani, Peter Stockham, Timothy Scott
Liquid chromatography/mass spectrometry (LC/MS) has quickly become the analytical method of choice in forensic toxicology laboratories due to its ability to detect a very wide range of compounds in a single analysis. One of the major limitations of LC/MS however, is a relatively limited linear dynamic range for quantitation. A new approach to combating this problem is to use the [(+1) M + H](+) isotope mass peak for quantitation, thereby reducing saturation at the detector and extending the linear range...
February 16, 2017: Drug Testing and Analysis
https://www.readbyqxmd.com/read/28203222/unexpected-death-of-a-child-with-complex-febrile-seizures-pathophysiology-similar-to-sudden-unexpected-death-in-epilepsy
#12
Brian J Dlouhy, Michael A Ciliberto, Christina L Cifra, Patricia A Kirby, Devin L Shrock, Marcus Nashelsky, George B Richerson
Febrile seizures are usually considered relatively benign. Although some cases of sudden unexplained death in childhood have a history of febrile seizures, no documented case of febrile seizure-induced death has been reported. Here, we describe a child with complex febrile seizures who died suddenly and unexpectedly after a suspected seizure while in bed at night during the beginning phases of sleep. She was resuscitated and pronounced brain dead 2 days later at our regional medical center. Autopsy revealed multiorgan effects of hypoperfusion and did not reveal an underlying (precipitating) disease, injury, or toxicological cause of death...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28199917/desomorphine-krokodil-an-overview-of-its-chemistry-pharmacology-metabolism-toxicology-and-analysis
#13
REVIEW
Diego Hernando Ângulo Florez, Ana Maria Dos Santos Moreira, Pedro Rafael da Silva, Ricardo Brandão, Marcella Matos Cordeiro Borges, Fernando José Malagueño de Santana, Keyller Bastos Borges
BACKGROUND: "Krokodil" or "Crocodile" is an illegal homemade desomorphine drug obtained from chemical reactions of commercial codeine drugs with several other powerful and highly toxic chemical agents increasing its addiction and hallucinogenic effects when compared with other morphine analogues. METHODS: This paper summarizes a complete review about an old drug called desomorphine (Krokodil), presenting its chemistry, pharmacology, metabolism, toxicology and analysis...
January 31, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/28187296/toxicological-investigation-of-forensic-cases-related-to-the-designer-drug-3-4-methylenedioxypyrovalerone-mdpv-detection-quantification-and-studies-on-human-metabolism-by-gc-ms
#14
Marcel Grapp, Christoph Kaufmann, Martin Ebbecke
3,4-methylenedioxypyrovalerone (MDPV) is a synthetic cathinone belonging to the class of α-pyrrolidinophenones that become increasingly popular as a designer psychostimulant. Here, we report a comprehensive collection of MDPV exposure with quantitative serum level confirmation in Germany. During the years 2014-2016, we could proof consumption of MDPV in 23 cases where urine and blood samples were submitted to our laboratory by the police of Lower Saxony. Most of the samples underwent systematic toxicological analysis by gas chromatography-mass spectrometry (GC-MS), where MDPV could be detected in urine and/or serum samples...
February 2, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28160051/characterization-and-identification-of-eight-designer-benzodiazepine-metabolites-by-incubation-with-human-liver-microsomes-and-analysis-by-a-triple-quadrupole-mass-spectrometer
#15
Souleiman El Balkhi, Maxime Chaslot, Nicolas Picard, Sylvain Dulaurent, Martine Delage, Olivier Mathieu, Franck Saint-Marcoux
Designer benzodiazepines (DBZDs) have become of particular importance in the past few years. The metabolite monitoring of DBZD in biological fluids could be of great interest in clinical and forensic toxicology. However, DBZD metabolites are not known or not commercially available. The identification of some DBZD metabolites has been mostly explored by self-administration studies or by in vitro studies followed by high-resolution mass spectrometry. The question arose whether a unit resolution instrument could be efficient enough to allow the identification of DBZD metabolites...
February 4, 2017: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/28149262/mass-spectrometry-applications-for-toxicology
#16
Michael M Mbughuni, Paul J Jannetto, Loralie J Langman
Toxicology is a multidisciplinary study of poisons, aimed to correlate the quantitative and qualitative relationships between poisons and their physiological and behavioural effects in living systems. Other key aspects of toxicology focus on elucidation of the mechanisms of action of poisons and development of remedies and treatment plans for associated toxic effects. In these endeavours, Mass spectrometry (MS) has become a powerful analytical technique with a wide range of application used in the Toxicological analysis of drugs, poisons, and metabolites of both...
December 2016: EJIFCC
https://www.readbyqxmd.com/read/28133719/the-toxicology-of-methadone-related-death-in-infants-under-1-year-three-case-series-and-review-of-the-literature
#17
Anthea B Mahesan Paul, Lary Simms, Arnold M Mahesan
Methadone-related fatalities occur rarely in infants under 1 year, with five confirmed cases in the literature. The interpretation of pediatric postmortem toxicology relies on adult data; however, infants have crucial physiological differences that may impact interpretation of results. Retrospective case review included scene investigation, interviews, autopsy, and NIH/CDC Sudden Unexplained Infant Death Investigation Reporting Form. Methadone levels were confirmed by liquid chromatography/tandem mass spectrometry (LC-MS/MS)...
January 30, 2017: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/28127666/examining-fatal-opioid-overdoses-in-marion-county-indiana
#18
Bradley Ray, Kenna Quinet, Timothy Dickinson, Dennis P Watson, Alfarena Ballew
Drug-related overdoses are now the leading injury-related death in the USA, and many of these deaths are associated with illicit opioids and prescription opiate pain medication. This study uses multiple sources of data to examine accidental opioid overdoses across 6 years, 2010 through 2015, in Marion County, IN, an urban jurisdiction in the USA. The primary sources of data are toxicology reports from the county coroner, which reveal that during this period, the most commonly detected opioid substance was heroin...
January 26, 2017: Journal of Urban Health: Bulletin of the New York Academy of Medicine
https://www.readbyqxmd.com/read/28127407/metabolites-replace-the-parent-drug-in-the-drug-arena-the-cases-of-fonazepam-and-nifoxipam
#19
REVIEW
Maria Katselou, Ioannis Papoutsis, Panagiota Nikolaou, Chara Spiliopoulou, Sotiris Athanaselis
Fonazepam (desmethylflunitrazepam) and nifoxipam (3-hydroxy-desmethylflunitrazepam) are benzodiazepine derivatives and active metabolites of flunitrazepam. They recently invaded the drug arena as substances of abuse and alerted the forensic community after being seized in powder and tablet forms in Europe between 2014 and 2016. A review of all the existing knowledge of fonazepam and nifoxipam is reported, concerning their chemistry, synthesis, pharmacology and toxicology, prevalence/use, biotransformation and their analysis in biological samples...
2017: Forensic Toxicology
https://www.readbyqxmd.com/read/28122286/does-the-forensic-physician-have-a-role-beyond-injury-documentation-and-specimen-collection-in-australia-a-personal-view
#20
John A M Gall
Clinical forensic medicine (CFM), as a single discipline, encompasses a number of areas of medico-legal practice including injury interpretation, management of sexual and physical assault cases (both adult and child; alleged victim and offender), mental health issues, traffic medicine, custodial medicine and toxicology. The cases are usually alive but in some jurisdictions the forensic practitioner also engages in death investigation with some undertaking autopsies. During the last 20-30 years, the discipline has fragmented with areas being hived off to other medical specialist disciplines and, importantly, to nurses...
February 2017: Journal of Forensic and Legal Medicine
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