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B) Drug dosage. For some drugs the dosage required is calculated on a body weight basis. Body weight is measured in kilograms (kg) and so this dose is usually quoted as mg per kg. Other drugs (particularly cytotoxins) are prescribed in terms of the patient’s body surface area, which is obtained from nomograms.
Drug dosage calculations are required when the amount of medication ordered (or desired) is different from what is available on hand for the nurse to administer. Formula: Amount DESIRED (D) X QUANTITY (Q) = Y (Tablets Required) Amount on HAND (H)
23 lip 2021 · In this blog series we will review several drug calculation methods. The first technique is the universal formula or the “desired over have” method. Before we begin, every nurse should be comfortable with basic metric conversions. You can find a handy conversion chart in our Nursing Pocket Card: Common Calculations.
Formula: 10 mg × 1 tab = x tab 5 mg KEY POINTS: Learn the method of your choice; study the setup. To arrive at the correct answer, the units of measurement must be set up so that they cancel. Working With a Method of Calculation Solve the following problems using the method of your choice. 1. The order is for 50 mg. The pharmacy sends 25
Step 1: What do I need? What unit of measurement do you need? . Write this on the right of your paper. Step 2: What is the order? . What does the order or prescription say? . Write this on the left of the paper. . Step 3: What conversion do I need to use? . Does the question give any conversion? .
In current nursing practice, the need to calculate drug dosages is not uncommon. These calculations have to be performed competently and accurately to ensure that the nurse – and more importantly the patient – is not put at risk. This book provides an aid to the basics of mathematics and drug calculations.
The basic drug dosage fonmull a listed below can be used for most drug dosage calculations. These calcullations are necessary when a doctor orders a particular desired dose of medication and the medication you have available on hand is in the form of mass/tablet or mass/volume. D - XQ = X Desired ---X Quantity = X Have "Give 500 milligrams"
