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forensic toxicology

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https://www.readbyqxmd.com/read/29453495/comparison-of-concentrations-of-drugs-between-blood-samples-with-and-without-fluoride-additive-important-findings-for-%C3%AE-9-tetrahydrocannabinol-and-amphetamine
#1
Christopher Wiedfeld, Julia Krueger, Gisela Skopp, Frank Musshoff
Fluoride is a common stabilizing agent in forensic toxicology to avoid the frequent problem of degradation of drugs in blood samples especially described for cocaine. In cases only samples with addition of fluoride are available, it is a crucial question if also concentrations of common drugs other than cocaine (amphetamines, opiates and cannabinoids) are affected by fluoride. So far, there are only rare literature data available on discrepant results especially for Δ 9 -tetrahydrocannabinol (THC). In this study, comparative analysis of positive tested paired routine plasma/serum samples (n = 375), collected at the same time point (one device with and one without fluoride), was carried out with special focus on cannabinoids...
February 17, 2018: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/29449106/hair-analysis-in-toxicological-investigation-of-drug-facilitated-crimes-in-denmark-over-a-8-year-period
#2
Xin Wang, Sys Stybe Johansen, Marie Katrine Klose Nielsen, Kristian Linnet
Hair can serve as a specimen for identifying past drug exposure. Segmental hair analysis may differentiate a single exposure from chronic use. Consequently, segmental hair analysis is useful for disclosing a single drug ingestion, as well as for determining repeated exposures in drug-facilitated crimes (DFCs). This paper presents an overview of toxicological investigations that have used hair analysis in DFC cases from 2009 to 2016 in Denmark. Hair concentrations were determined for 24 DFC-related drugs and metabolites, including benzodiazepines and other hypnotics, antihistamines, opioid analgesics, antipsychotics, barbiturates, and illicit drugs from DFC cases...
February 5, 2018: Forensic Science International
https://www.readbyqxmd.com/read/29443781/unexpected-custodial-death-due-to-acute-epiglottitis-a-rare-autopsy-case-report
#3
Shifan Wu, Luo Zhuo, Xingang Qiu, Zijiao Ding, Mingzhen Yang, Meichen Pan, Qian Liu
RATIONALE: Acute epiglottitis is a potentially life-threaten disease, which makes it more challenging to save the life for doctors. Unexpected deaths in custody are a primary cause of concern for the forensic community and doctor worldwide. PATIENT CONCERNS: We present a case of a 44-year-old male detainee who was clinically suspected of dying of acute epiglottitis. The man experienced failure of resuscitation and died after admitted to a hospital. DIAGNOSES: The autopsy, toxicological testing, the test of immunoglobulin E and bacterial culture suggested the patient died of acute epiglottitis...
February 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29425331/modafinil-in-forensic-and-clinical-toxicology-case-reports-analytics-and-literature
#4
Lars Radünz, Hannah Reuter, Hilke Andresen-Streichert
Modafinil is used because of its wakefulness-promoting properties for treatment of diseases associated with extreme sleepiness (i.e., narcolepsy). Additionally, it is misused as a "cognitive enhancer" to increase alertness and to improve concentration. We present modafinil concentrations in serum samples in five cases of our routine work measured by high-performance liquid chromatography coupled with a photo diode array detector after solid-phase extraction. One sample was analyzed for clinical toxicology purposes...
February 7, 2018: Journal of Analytical Toxicology
https://www.readbyqxmd.com/read/29409037/metabolites-of-heroin-in-several-different-post-mortem-matrices
#5
Cecilie Hasselø Thaulow, Åse Marit Leere Øiestad, Sidsel Rogde, Ritva Karinen, Gerd Wenche Brochmann, Jannike Mørch Andersen, Gudrun Høiseth, Marte Handal, Jørg Mørland, Marianne Arnestad, Elisabeth Leere Øiestad, Dag Helge Strand, Vigdis Vindenes
In some forensic autopsies blood is not available, and other matrices are sampled for toxicological analysis. The aims of the present study were to examine whether heroin metabolites can be detected in different post-mortem matrices, and investigate whether analyses in other matrices can give useful information about concentrations in peripheral blood. Effects of ethanol on the metabolism and distribution of heroin metabolites were also investigated. We included 45 forensic autopsies where morphine was detected in peripheral blood, concomitantly with 6-acetylmorphine (6-AM) detected in any matrix...
February 2, 2018: Journal of Analytical Toxicology
https://www.readbyqxmd.com/read/29405180/-on-the-occasion-of-the-200th-birthday-anniversary-of-d-e-min
#6
Yu I Pigolkin
This article is dedicated to the memory of the outstanding Russian forensic doctor and literary figure professor D.E. Min on the occasion of his 200th birthday anniversary. The assignment of D.E. Min to the position of the head of Department of the State Medical Practice at the Emperor's Moscow University coincided with the large-scale judiciary reform carried out in the country at that time which envisaged, among other innovations, the practice of questioning of an expert in the court room. The new developments in the practical expert activities required the revision of the former approaches to the education and training of forensic medical experts...
2018: Sudebno-meditsinskaia Ekspertiza
https://www.readbyqxmd.com/read/29403341/in-vitro-metabolite-profiling-of-adb-fubinaca-a-new-synthetic-cannabinoid
#7
Jeremy Carlier, Xingxing Diao, Ariane Wohlfarth, Karl Scheidweiler, Marilyn A Huestis
Metabolite profiling of novel psychoactive substances (NPS) is critical for documenting drug consumption. N-(1-amino-3,3-dimethyl-1-oxobutan-2-yl)-1-(4-fluorobenzyl)-1H-indazole-3-carboxamide (ADB-FUBINACA) is an emerging synthetic cannabinoid whose toxicological and metabolic data are currently unavailable. We aimed to determine optimal markers for identifying ADB-FUBINACA intake. Metabolic stability was evaluated with human liver microsome incubations. Metabolites were identified after 1 and 3 h incubation with pooled human hepatocytes, liquid chromatography- high resolution mass spectrometry in positive-ion mode (5600+ TripleTOF®, Sciex) and several data mining approaches (MetabolitePilot™, Sciex)...
July 2017: Current Neuropharmacology
https://www.readbyqxmd.com/read/29382109/chiral-drug-analysis-in-forensic-chemistry-an-overview
#8
REVIEW
Cláudia Ribeiro, Cristiana Santos, Valter Gonçalves, Ana Ramos, Carlos Afonso, Maria Elizabeth Tiritan
Many substances of forensic interest are chiral and available either as racemates or pure enantiomers. Application of chiral analysis in biological samples can be useful for the determination of legal or illicit drugs consumption or interpretation of unexpected toxicological effects. Chiral substances can also be found in environmental samples and revealed to be useful for determination of community drug usage (sewage epidemiology), identification of illicit drug manufacturing locations, illegal discharge of sewage and in environmental risk assessment...
January 28, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29378027/phosphine-analysis-in-postmortem-specimens-following-inhalation-of-phosphine-fatal-aluminum-phosphide-poisoning-in-children
#9
Hui Yan, Hang Chen, Zhengdong Li, Min Shen, Xianyi Zhuo, Hejian Wu, Ping Xiang
Phosphine is an insecticide for the fumigation of grains, animal feed, and leaf-stored tobacco, and it was used as a rodenticide in bulk grain stores. Phosphine poisoning may occur after accidental inhalation of phosphine, sometimes leading to death. Analysis of phosphine and its metabolites in postmortem specimens from seven fatal cases was conducted in this study, as well as postmortem specimens collected from rabbits exposed to phosphine. The total phosphine in postmortem specimens was analyzed by headspace gas chromatography coupled with mass spectrometry...
January 25, 2018: Journal of Analytical Toxicology
https://www.readbyqxmd.com/read/29374833/bioanalytical-methods-for-new-psychoactive-substances
#10
Lea Wagmann, Hans H Maurer
Bioanalysis of new psychoactive substances (NPS) is very challenging due to the growing number of compounds with new chemical structures found on the drugs of abuse market. Screening, identification, and quantification in biosamples are needed in clinical and forensic toxicology settings, and these procedures are more challenging than the analysis of seized drug material because of extremely low concentrations encountered in biofluids but also due to diverse metabolic alterations of the parent compounds. This article focuses on bioanalytical single- and multi-analyte procedures applicable to a broad variety of NPS in various biomatrices, such as blood, urine, oral fluid, or hair...
January 28, 2018: Handbook of Experimental Pharmacology
https://www.readbyqxmd.com/read/29373719/quantification-of-15-psychotropic-drugs-in-serum-and-postmortem-blood-samples-after-a-modified-mini-quechers-by-uhplc-ms-ms
#11
A Pouliopoulos, E Tsakelidou, A Krokos, H G Gika, G Theodoridis, N Raikos
The aim of the study was to develop a LC-MS-MS method able to detect and quantify a number of frequently prescribed antipsychotic and antidepressant drugs for toxicological purposes. Separation of compounds was performed on a C-18 RP column by Ultra High-Pressure Chromatography over a 11 min run. A modified single step QuEChERS protocol consisted essentially by the addition of acetonitrile, potassium carbonate and magnesium sulfate in 100 μL of sample, vortexing, centrifugation and evaporation has been selected...
January 24, 2018: Journal of Analytical Toxicology
https://www.readbyqxmd.com/read/29367861/the-newest-cathinone-derivatives-as-designer-drugs-an-analytical-and-toxicological-review
#12
REVIEW
Milena Majchrzak, Rafał Celiński, Piotr Kuś, Teresa Kowalska, Mieczysław Sajewicz
Purpose: Currently, among new psychoactive substances, cathinone derivatives constitute the biggest group, which are mainly classified into N-alkylated, 3,4-methylenedioxy-N-alkylated, N-pyrrolidinyl, and 3,4-methylenedioxy-N-pyrrolidinyl derivatives. These derivatives are actively being subjected to minor modifications at the alkyl chains or the aromatic ring to create new synthetic cathinones with the goal of circumventing laws. In this review, the new synthetic cathinones that have appeared on the illegal drug market during the period 2014-2017 are highlighted, and their characterization by gas chromatography-mass spectrometry and liquid chromatography-tandem mass spectrometry is presented...
2018: Forensic Toxicology
https://www.readbyqxmd.com/read/29360016/blow-trauma-to-the-chest-and-sudden-cardiac-death-commotio-cordis-and-contusio-cordis-are-leading-causes
#13
Lydia Krexi, Mary N Sheppard
Background In forensic practice, a blow to the chest can lead to sudden cardiac death (SCD). Commotio cordis and contusio cordis are leading causes. Methods From a database of 4678 patients who suffered from SCD, we found three patients with commotio cordis and two patients with contusio cordis. All the patients were examined macroscopically and microscopically and had negative toxicology screen. Results The three patients who died due to commotio cordis were young males (16, 23 and 38 years old). The circumstances of death were: a blow to the chest by a football, by a friend during a party and during an assault...
January 1, 2018: Medicine, Science, and the Law
https://www.readbyqxmd.com/read/29339839/trends-in-trauma-related-mortality-among-adolescents-a-6-year-snapshot-from-a-teaching-hospital-s-post-mortem-data
#14
Sachil Kumar, Anoop K Verma
Introduction: The aim is to explore the trends in trauma mortality in children aged 0-18 years can help to co-ordinate resources toward research and programs to reduce the burden. Methods: This is a retrospective study carried out on adolescents ≤18 years of age autopsied according to the attorney request at Forensic Medicine & Toxicology department of King George's Medical University, Lucknow, India in the period from January 1st, 2009 to December 31st, 2014...
November 2017: Journal of Clinical Orthopaedics and Trauma
https://www.readbyqxmd.com/read/29332838/rapid-and-sensitive-tapered-capillary-microextraction-combined-to-on-line-sample-stacking-capillary-electrophoresis-for-extraction-and-quantification-of-two-beta-blockers-in-human-urine
#15
Shucheng Sun, Yujia Wang, Xin Liu, Rao Fu, Li Yang
A tapered-capillary microextraction (tCap-μEx) combining with field-amplified stacking (FASI) method for CE analysis was developed. The tCap-μEx method is based on the construction of a micro solid phase extraction (SPE) column by narrowing the end of a silica capillary from 530µm (inner diameter) to 20µm, enabling the packing of 45µm sorbent particles without a frit. Various parameters that may affect the microextraction and FASI-CE analysis have been investigated and optimized. This study shows that microextraction exhibits advantages of small sample and sorbent volumes (less than 200μL sample and 2μL sorbent) and fast extraction time of 6min...
April 1, 2018: Talanta
https://www.readbyqxmd.com/read/29329431/a-validated-method-for-the-screening-of-320-forensically-significant-compounds-in-blood-by-lc-qtof-with-simultaneous-quantification-of-selected-compounds
#16
Emma Partridge, Stephen Trobbiani, Peter Stockham, Timothy Scott, Chris Kostakis
A broad drug screening method for toxicologically significant drugs and metabolites in whole blood using liquid chromatography time-of-flight mass spectrometry (LC/QTOF) was developed and comprehensively validated. The method qualitatively screens for 320 compounds while simultaneously quantifying 39. Compounds were extracted from the blood using alkaline liquid/liquid extraction and chromatographic separation was achieved in 12 min. The QTOF was operated using positive mode electrospray ionization using data dependent acquisition...
January 10, 2018: Journal of Analytical Toxicology
https://www.readbyqxmd.com/read/29317062/could-the-screening-for-correct-oral-health-reduce-the-impact-of-death-due-to-bolus-asphyxia-in-adult-patients-a-forensic-case-report
#17
Isabella Aquila, Santo Gratteri, Matteo A Sacco, Emilio Nuzzolese, Vittorio Fineschi, Paola Frati, Pietrantonio Ricci
INTRODUCTION: "Bolus death" or "Café Coronary syndrome" refers to death due to asphyxia caused by an occlusion of the upper airways due to food. In this kind of asphyxia, the food bolus obstructs the larynx or the bronchial branches. This kind of event often affects subjects with acute intoxication due to alcohol or drugs, or with edentulism and with neurological or psychiatric diseases. CASE REPORT: An elderly woman, suffering from schizophrenia, was found dead in her house due to food bolus asphyxia...
January 2018: Medical Hypotheses
https://www.readbyqxmd.com/read/29301115/considerations-regarding-the-validation-of-chromatographic-mass-spectrometric-methods-for-the-quantification-of-endogenous-substances-in-forensics
#18
Cornelius Hess, Konrad Sydow, Theresa Kueting, Michael Kraemer, Alexandra Maas
The requirement for correct evaluation of forensic toxicological results in daily routine work and scientific studies is reliable analytical data based on validated methods. Validation of a method gives the analyst tools to estimate the efficacy and reliability of the analytical method. Without validation, data might be contested in court and lead to unjustified legal consequences for a defendant. Therefore, new analytical methods to be used in forensic toxicology require careful method development and validation of the final method...
December 18, 2017: Forensic Science International
https://www.readbyqxmd.com/read/29300918/detection-of-cocaine-and-metabolites-in-bone-following-decomposition-using-2d-lc-ms-ms
#19
Malorie Mella, Brendan Schweitzer, Claude R Mallet, Tara Moore, Sabra Botch-Jones
Introduction: In forensic toxicology, challenges exist with quantification analysis of cocaine and metabolites in postmortem samples following extensive decomposition. Alternative matrices, such as bone could prove useful when other specimens are not available. Detection and quantification of drugs in complex matrices require time-consuming extraction processes. The objective of this study was to develop a robust extraction and clean-up methodology to efficiently extract cocaine, and its metabolites, in bone and reach target limits of detection using multidimensional chromatography...
December 28, 2017: Journal of Analytical Toxicology
https://www.readbyqxmd.com/read/29300899/tissue-distribution-of-suvorexant-in-three-forensic-autopsy-cases
#20
Brian Waters, Kenji Hara, Natsuki Ikematsu, Mio Takayama, Aya Matsusue, Masayuki Kashiwagi, Shin-Ichi Kubo
Suvorexant (Belsomra®) is a relatively new insomnia medication that has been available in USA and Japan since 2014. It is a dual orexin receptor antagonist that promotes sleep by inhibiting the binding of orexin neurons to the OX1R and OX2R receptors. In this report, we describe the detection and quantitation of suvorexant from the postmortem specimens of three separate autopsy cases handled by our department. Suvorexant was identified by fast gas chromatography/mass spectrometry during routine screening, and quantitated by a fully validated liquid chromatography-tandem mass spectroscopy method...
December 28, 2017: Journal of Analytical Toxicology
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