Masayuki Kashiwagi

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The drowning index (DI) was devised to diagnose drowning deaths, and is the weight ratio of the lungs and pleural effusion to the spleen. Among drowning (94 cases), mechanical asphyxia (47 cases), and acute cardiac (42 cases) deaths, within 2 weeks postmortem we compared six markers, the weight of each lung, pleural effusion weight, total weight of the(More)
A 29-year-old woman, who had been suffering from left facial palsy, died 3.5 hours after undergoing stellate ganglion block (SGB). Autopsy revealed subcutaneous emphysema of the body, bilateral pneumothorax and a huge post-tracheal hematoma. The lower half of the trachea was markedly flattened by pressure from this hematoma. The cause of death was certified(More)
The erythematous patches and vesicles that are observed in coma patients, usually from an overdose of medication, are known as coma blisters. However, it is unknown whether the degenerated sweat gland is a necrosis or apoptosis. We immunohistochemically examined such skin lesions to investigate the characteristics and pathogenesis of the coma blister. Skin(More)
To diagnose the cause of death in autopsy cases, systematic examinations, such as macroscopic, pathological, biochemical, and toxicological are important. In this case report, drug examinations also gave very useful information to diagnose the cause of death, fatal diabetic ketoacidosis (DKA). A female methamphetamine abuser in her forties was found dead(More)
We report an autopsy case of a man in his forties who died 2 days after taking an overdose of vegetamin. The autopsy findings were as follows: externally, the upper epidermis of some parts of the body had become loosened. The epidermis was easily detached from the dermis using the fingers. Viscous fluid adhered around the nose and mouth. The brain was(More)
A rapid analysis of methamphetamine and its metabolites in urine was performed by gas chromatography-mass spectrometry (GC-MS) using a short narrow-bore capillary column (NBC) (5 m x 0.1 mm I.D.). For detection, selected ion monitoring (SIM) was performed for the characteristic ions of each of the compounds. The analytes were independently detected within 2(More)
A simple method for the differentiation of three cathinone-type regioisomers, 2-, 3- and 4-methyl-α-pyrrolidinobutiophenone (MePBPs), using a bromination procedure was developed in this study. The bromination was performed in a vial where isomers of MePBP, iron(III) bromide, and liquid bromine were added. After excess bromine in the vial was evacuated and(More)
A method for quantitative analysis of acetylene in blood and urine samples was investigated. Using cryogenic gas chromatography-mass spectrometry (GC-MS), acetylene was measured with isobutane as the internal standard in the headspace method, which revealed a linear response over the entire composite range with an excellent correlation coefficient, both in(More)
Methamphetamine (MA) use sometimes causes rhabdomyolysis, which has been associated with mortality. We analyzed potential rhabdomyolysis-susceptibility genes from autopsy samples of 18 methamphetamine abusers. We examined mutations in the ryanodine receptor 1 (RYR 1), carnitine palmitoyltransferase II (CPT II), very long-chain acyl-CoA dehydrogenase(More)
A 12-year-old boy died in a storage room and his mother was rescued from the same storage room, where many apples were being stored. The atmosphere in the room was strictly controlled and the concentration of oxygen (O2) was recorded. The cause of death was suffocation. According to the records, the concentration of O2 was about 2.7% when the boy died. On(More)