Xem 1-20 trên 220 kết quả Poisons
  • Foreword: It was with great pleasure that I accepted the invitation to write the foreword for Drugs and Poisons in Humans. A Handbook of Practical Analysis. Dr. Osamu Suzuki and Dr. Mikio Yashiki, two outstanding Japanese scientists, fi rst published the Handbook in Japanese in 2002. Specialists throughout Japan contributed analytical methods for a wide variety of therapeutic and illicit drugs, pesticides, and natural toxins and alkaloids. In fact, rarely has such a wide spectrum of analytes and metabolites been addressed within a single reference manual....

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  • Introduction: Blood, urine and stomach contents (including gastric lavage fluid and vomitus) are usually used as specimens for analysis of drugs and poisons for living subjects. A blood concentration of a toxin can be an indicator for estimation of intoxication degree. Urine sometimes contains large amounts of metabolites and/or an unchanged form of a toxin; it contains low levels of proteins, which usually interfere with analysis, and thus is suitable for screening tests using immunoassays without tedious pretreatments.

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  • Introduction: Small amount of drugs and poisons incorporated into human bodies are hidden among large amounts of biological components, such as proteins, lipids, nucleic acids and membranes. It is not easy to detect only a target compound from such complicated matrices. Before instrumental analysis, extraction procedure is usually essential and very important.

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  • Introduction: Datura metel a (jimsonweed) is a plant belonging to the Solanacea family; and contains tropane alkaloids (belladonna alkaloids), such as atropineb (dl-hyoscyamine) and hyoscine (dl-scopolamine), in its seeds and every part of the plant. Its seeds and leaves have long been being used as a folk medicine in Japan. Seishu Hanaoka, a Japanese surgeon, first used this plant for general anaesthesia in 1804.

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  • Introduction: The advancement of technologies was marvelous during the past half century; new analytical instruments have been being invented and improved. About 30 years ago, thin-layer chromatography (TLC) was being used most widely for detection and identification of drugs and poisons. Around that time, the use of GC/MS started in the field of medicine. Therefore, an ideal procedure for analysis of drugs and poisons was considered to be the screening by TLC, followed by the final identification and quantitation by GC/MS.

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  • Introduction: Toluene, benzene, xylene and styrene are being widely used for chemical product materials, solvents and constituents of adhesives and paints, and thus sometimes cause poisoning incidents by inhaling their gas at chemical product-manufacturing factories. The abuse of thinner solvents, containing toluene, benzene and xylene, is now a social problem especially for young people. There are many crimes and poisoning incidents involving the thinner solvent abuse.

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  • Introduction: Forensic autopsy is an important task for proving crimes medically; unfortunately, every department of legal medicine of Japanese universities is suffering from insufficient staffs and budget. About 30 years ago, one of the authors started the analysis of drugs and poisons at the Department of Legal Medicine, Hiroshima University School of Medicine. At that time, the author did not have much knowledge about poison analysis; but it is a good memory that many good friends of toxicological societies gave the author many useful suggestions on analytical methods.

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  • Introduction: The identification of a causative toxin is one of the most important tasks in emergency medicine; it requires both rapidness and accuracy. In the Japan-shaking poisoning incidents taking place in 1998, such as curry (arsenous acid) poisoning in Wakayama, sodium azide poisoning in Niigata and cyanide poisoning in Nagano, the importance of a rapid and accurate analysis system for poisons was well recognized by Japanese people and goverment.

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  • Introduction: Barbiturates are being widely used as antiepileptics, hypnotics and anaesthetics ( Figure 6.1 and Table 6.1). The incidence of barbiturate poisoning cases tends to increase in Japan ( Figure 6.2) [1]. A majority of the barbiturate drugs is being controlled by the Narcotics ⊡ Figure 6.1 Structures of barbiturates. © Springer-Verlag Berlin Heidelberg 2005 302 Barbiturates ⊡ Figure 6.2 Incidence of fatal barbiturate poisoning cases. Since fatal cases due to Vegetamin® tablets containing phenobarbital are many, its incidence rate is also shown in this figure.

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  • Introduction: Butyrophenone drugs including haloperidol are being widely used in the field of psychiatry. The acute butyrophenone poisoning incidents sometimes take place; in such cases, the analysis of a butyrophenone becomes necessary in forensic toxicology or clinical toxicology. Their analysis is being made by GC [1–4], GC/MS [5–6], HPLC [7–15] and LC/MS [16,17]. Six butyrophenones are now available as ethical drugs in Japan ( Fig. 2.1); the most typical ones are haloperidol and bromperidol, which most frequently cause poisoning incidents among butyrophenones.

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  • Introduction: Propionic acid derivative analgesic-antipyretics ( Table 2.1) are non-steroidal and antiinflammatory drugs. As one of mechanisms of their pharmacological actions, inhibition of prostaglandin biosynthesis can be mentioned. Although fatal cases due to propionic acid derivative analgesic-antipyretics are not many in the world, the incidence of poisoning (including survived cases) by this drug group is relatively high among therapeutic drugs in Japan [1].

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  • Introduction: The chemical warfare agents well known count only about 30 kinds of compounds, such as sarin, soman, tabun, VX, mustard gas, lewisite and others. When unknown toxic substances should be analyzed upon the occurrence of chemical terrorism, much more kinds of poisons and related compounds become the objects of analysis. In the Chemical Weapons Convention (CWC)a, 120 thousand compoundsb, including typical chemical warfare agents, their related compounds, precursors and decomposition products, are being listed to be controlled.

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  • Introduction: Bromisovalum (α-bromoisovalerylurea, bromovalerylurea, Brovarin) ( Figure 5.1) has long been being used as a hypnotics or sedative since many years ago. It is not only prescribed as an ethical drug, but also contained in some analgesic- antipyretics and hypnotics being sold as over-the-counter drugs. Because of the easiness of getting it, bromisovalum is one of the most important drugs in poisoning in Japan. The analysis of bromisovalum is being made by GC [1, 2], GC/MS [3], HPLC [4, 5] and LC/MS [6–8].

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  • Introduction: Non-selective phosphorus-containing amino acid-type herbicides (PAAHs) to be used for foliage exhibit lower toxicities than paraquat and are easily obtainable; they, thus, have come into wide use since 1980. The PAAHs include glufosinate (GLUF), glyphosate (GLYP) and bialaphos (BIAL). In Japan, there are many kinds of products containing GLUF and GLYP commercially available, and the number of suicidal cases using them is increasing [1].

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  • Introduction: Chloroform exerts a suppressing effect on the central nervous system. It had been used as a general anaesthetic since the 19th century, but it disappeared, because of its hepatotoxicity and arrhythmia-inducing effects. It is now being used for industrial purposes, such as a solvent, extracting reagent, refrigerant and chemical material. Chloroform poisoning can be seen in accidental, suicidal [1] and homicidal cases.

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  • Introduction: Acetylsalicylic acid (ASA, aspirin) ( Figure 4.1) has been being used as an analgesic-antipyretic for a long time; it is contained in many of over-the-counter drugs. Although ASA is relatively safe, various poisoning symptoms, such as lowered consciousness levels, hypotension, pulmonary edema and convulsion, were reported upon ingestion of a large amount of this drug [1]. For analysis of ASA, methods by HPLC [2–19], GC [20–23], GC/MS [24] and capillary electrophoresis [25–27] were reported; among these methods, HPLC is most popular. ...

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  • Introduction: Hydrogen sulfide (H2S) is a colorless gas with the smell of putrid eggs; it can exist in both nonionic and ionic forms in aqueous solution. The ratio of the nonionic form to the total ionized one is influenced by concentration of hydrogen ion in the solution. Under acidic conditions, H2S does not ionized and evaporated from water; under alkaline conditions it is easily ionized and retained in the solution.

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  • Introduction: Among many carbamate pesticides commercially available in Japan, those with relatively high toxicities are shown in Table 4.1 [1]. Carbamate pesticides are generally classified into N-methylcarbamate insecticides and N-allylcarbamate herbicides in view of their chemical structures and biological actions. The number of fatalities due to poisoning by carbamate pesticides is 50–100 every year in Japan; many of them are poisoned by methomyl [2].

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  • Introduction: Determination of methemoglobin (Met-Hb) in blood is important for the diagnosis of poisoning by oxidants, such as nitrite, nitrate, chlorate, chlorite, alkyl nitrites, nitroglycerin, aniline and other compounds. In 1938, Evelyn and Malloy [1] had devised a photoelectric method for determination of Met-Hb in blood. Minor modifications of this method were made by several researchers to increase sensitivity [2–4]. These methods are based on a phenomenon that the absorbance maximum of weakly acidic Met-Hb at 630 nm disappears by addition of cyanide.

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  • Introduction: Methanol (methyl alcohol) poisoning accidents take place most frequently by drinking it in mistake for ethanol. Methanol poisoning is not due to the effect of methanol itself, but due to toxicity of its metabolites. Methanol is rapidly absorbed into human body through the airway mucous membranes, digestive tract mucous membranes or the skin; it is metabolized into formaldehyde (formalin, HCHO) and then formic acid (HCOOH) by the actions of alcohol dehydrogenase and aldehyde dehydrogenase, respectively.

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