However, it is important to take extra care when using a calculator to prevent operator or machine error. The use of calculators in applying mathematical formulae is inevitable, particularly for more complex calculations. The NMC (2002) also stipulates that two practitioners should be involved in complex calculations and it is considered good practice for two to be involved in all but the most basic drug calculations. Many organisations’ policies stipulate that two practitioners must check drugs, particularly those administered intravenously. To minimise the number of errors caused by miscalculating dose, volume or rate of administration nurses must be familiar with and apply a number of mathematical formulae (Trim, 2004). Nurses interested in learning the skill of drug calculation and administer and monitor medicines and intravenous therapy should get enrolled into specialised courses designed to teach precise dosage calculation formulas depending on the requirements of different patients.Dan Higgins, RGN, is senior charge nurse critical care, University Hospital Birmingham NHS Trust and senior clinical educator, Specialist Nurse Education Services Maintaining accuracy
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