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During the past decade, tandem mass spectrometry hyphenated to liquid chromatography separation systems (HPLC-MS/MS) has developed to an important technology in clinical chemistry — not only for research purposes but also for routine use. At present, most important application fields are target analyses in therapeutic drug monitoring (TDM) and metabolic disorders diagnosis. The essential strengths of HPLC-MS/MS include potentially high analytical specificity, wide range of applicability to small and large molecules, capability of multi- and mega-parametric tests, and the opportunity to develop powerful assays with a high degree of flexibility within a short time frame. The technique has overcome important limitations of GC-MS and is characterized by short analytical runtimes, applicability to thermo labile, polar and large molecules, and straightforward sample preparation. However, implementation of HPLC-MS/MS assays still requires substantial expertise and know-how. At the present, its application is limited to a rather small number of clinical routine laboratories. Nonetheless, HPLC-MS/MS has the potential to be further developed to a commonly applied high-throughput technique in clinical chemistry, complementary to present standard techniques as photometry and ligand binding methods. This review intends to characterize working characteristics of present day HPLC-MS/MS instrumentations used in clinical routine laboratories. Limitations of currently available systems and applications will be critically discussed. Required instrument improvements supporting the successful spreading of HPLC-MS/MS in laboratory medicine within the next decade will be outlined. 相似文献
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Limited data exist on overdose with new antiepileptic drugs. We reviewed the medical records of two patients who took a topiramate overdose as a suicide attempt. We recorded their medical and seizure histories, concomitant antiepileptic medications, neurologic examination, and laboratory findings at the time of presentation following the overdose. We also recorded their progress and the evolution of laboratory abnormalities. Both patients progressed to coma and had generalized convulsive status epilepticus, requiring intubation and treatment with benzodiazepines. Both patients recovered within 2 days but had a non-anion-gap metabolic acidosis that persisted for 5-6 days. Physicians should carefully monitor patients treated with topiramate who develop signs of clinical depression. The non-anion-gap metabolic acidosis observed may be due to inhibition of renal cortical carbonic anhydrase. 相似文献
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Dr Donna Seger Stephen Kahn Edward P. Krenzelok 《Adverse drug reactions and toxicological reviews》2005,24(4):217-227
In the US, two antivenins are marketed for the treatment of snake envenomation. The horse-derived serum-globulin-based Antivenin (Crotalidae) Polyvalent (ACP) has been available since 1954. There are few data on the efficacy and incidence of adverse events that occur following the administration of ACP. Most of the data are retrospective, anecdotal, or case reports. In 2000, ovine-derived serum-globulin-based ACP (Crofab®) became available. Crofab® is said to cause fewer reactions than ACP, but there are few comparative data to substantiate this claim. Although both antivenins ameliorate the systemic symptoms following snake envenomation, the efficacy of either antivenin in decreasing oedema and swelling is unknown for a number of reasons. Clinical trials are small and have not included control arms. The degree of oedema, as well as the efficacy of the antivenin in decreasing oedema, may depend on the genera of the snake (usually unknown) that envenomated the patient. This article compares available data on clinical aspects of the two antivenins. More prospective data are needed to determine the comparative efficacy of the two antivenins, or the efficacy of Crofab® in preventing tissue oedema. There are still unanswered questions regarding the optimal dosing regimen of Crofab®. 相似文献
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R. Seger und R. Steffen 《Sozial- und Pr?ventivmedizin》1995,40(2):71
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