Accuracy In engineering, “accuracy” is the ratio of the “error” of a system to the range of values for output that are possible, i.e., the ratio of error to so-called Full-Scale Output. “Accuracy”, as formally defined, and the elements that contribute to it can be only briefly outlined here. Generally, “input” can be looked on as the measured value of an independent variable or “measurand” “output” can be viewed as a measurement made under non-standard or test conditions. In quantitative chemical analyses, the “calibration curve” is an example of the input-output relationship. In physics and engineering, the “stress-strain diagram” is a special representation of the input-output relationship in pharmacology, the “dose-effect curve” is an example of the input-output relationship. The input-output relationship, for all its generality, has specific application–and specific names–in different scientific fields and for different kinds of experimental or observational systems. The elements to be taken into account in a complete evaluation of a method or system can be derived from the properties of the quantitative relationship between the “input” and the “output” for the system. Effective use of a method or observation requires that we know the ways and degrees to which the data are free of error, not that we know only that the data are “accurate” or “inaccurate”. “Accurate” is frequently used to refer indiscriminately to the effect of any of these elements, or to the combined effects of all of them on the freedom from error of a system. The use of the single word “accurate” also hides the fact that a number of separate elements contribute to over-all freedom from error. The use of the word “accurate” – free of error – in referring to a scientific observation or scientific method sometimes obscures the fact that even the best methods and observations are only relatively free from error. b, Compartment(s), Volume of Distribution, Half-Life a is used as a subscript for pharmacokinetic parameters appropriate to the distributive phase, e.g., t 1/2a, V da, etc.Ĭf. The earlier segment of a biphasic plot of log C against t (following intravenous injection of a drug) represents the “distributive phase” of a drug’s sojourn in the body. The amount of drug in the drug’s volume of distribution is equal to the concentration of the drug times the volume: A = C Special attributes of the amount are indicated by subscripts: A 0, the amount of drug in the body at “zero-time ” A B, the amount of drug in the body A U, the amount of drug recovered in the urine, etc. Please report any faulty links on the Contact Us page.Ī – B – C – D – E – F – G – H – I – K – L – M – N – P – R – S – T – U – V – ZĪn amount of drug or chemical in units of mass such as milligrams. Questions or comments should be mailed to Carol Walsh, Ph.D. Professor Emeritus and Former Chairman of Pharmacology Glossary of Terms and Symbols Used in PharmacologyĬopyright 1995-2022 by Trustees of Boston University. Pharmacokinetic and Pharmacodynamic Simulators.Student Handbook / NRSA & Fellowship Guidelines/ Scientific Meetings.I'm so OCD about my cups that I order them from shortest to tallest in the cupboard.Boston University Chobanian & Avedisian School of Medicine: Pharmacology & Experimental Therapeutics He's such a neat freak, every time I drop a few chips while eating the guy whips out his handheld vacuum and cleans them up. My wife is really anal about making sure nobody wears shoes in the house.Īlternatively: My mom was always anal retentive when I was growing up if she didn't know where I was at all times she would call me and have me give a status report. Stickler is a word you might not see very commonly but if you mention it to a native English speaker they should get your gist. OCD is similar to anal in the sense that people are obsessed about keeping things neat, or in whatever way they think things should be. Neat freak is just as another poster mentioned, but it is an AmE colloquialism. You could say a number of things: anal retentive or just anal, neat freak, OCD referring to obsessive compulsive disorder, or " stickler for x"Īnal can describe someone who is clean to the point of it becoming a problem, however it is commonly used it in an exaggerating sense.
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