![]() ![]() DO NOT perform any examination or procedure on patients based purely on the content of these videos. Join the Geeky Medics community: □□□□Īlways adhere to medical school/local hospital guidelines when performing examinations or clinical procedures. Subscribe to our newsletter to be the first to know about our latest content: ✉️ Although the process is relatively simple, ensuring you apply a systematic approach to both your assessment of the patient and the documentation is essential.Ĭheck out our other awesome clinical skills resources including: See our written guide for details ĭeath confirmation is often assessed in OSCEs and it is something you’ll be required to do regularly once you hit the wards. This video demonstrates how to confirm the death of a patient in an OSCE setting according to UK guidelines. Then, we can rearrange C=M/V to find the volume of nitrofurantoin solution required to achieve a dose of 7.125mg.ĭose = 1.425 ml, however, the patient cannot measure 1.425ml. Step 3: Calculate the amount of nitrofurantoin in ml required to make a dose of 7.125mgįirst, we must calculate the concentration of the nitrofurantoin solution. ![]() Step 1: Calculate the dose of nitrofurantoin for this patient based on their weight Nitrofurantoin suspension comes in 25mg/5ml.Ĭalculate the dose in ml required for this patient. You were required to prescribe nitrofurantoin for a urinary tract infection in a 10-month-old child who weighs 9.5 kg. Rate of infusion = įinal answer: Supply 2 bottles of phenoxymethylpenicillin 250mg/5ml Dose by weight Our patient requires 1000 mg: 1000mg/50mg = 20 minutes Step 3: Calculate the infusion rate in ml/min ![]() Step 2: Calculate the total volume of infusion Volume (ml) of phenytoin = x volume of the original pack Step 1: Calculate the volume of phenytoin required Each 5 ml vial of phenytoin sodium contains 250 mg. The consultant has decided to commence intravenous phenytoin with a loading dose of 1000 mg, which is to be diluted in 100 ml of normal saline.Ĭalculate the infusion rate of phenytoin for this patient in ml/min. Whilst in ED, she develops prolonged seizures and status epilepticus. Each question is worth 2 marks.ĭrug calculation topics which may appear in the PSA includeĭuring your rotation in the emergency department, a 24-year-old woman who weighs 60 kg was brought in by ambulance following a seizure. There will be eight questions assessing drug calculation skills in the Prescribing Safety Assessment (PSA). In contrast, the paediatric population have under-developed organ systems, and medication doses are often based on the age, weight or body surface area of the child.Ĭommon drug calculation errors in clinical practice include miscalculating the concentration of medicine in solution, incorrect dose unit conversion and incorrect rate of administration for infusion. Medication doses may need to be adjusted, as the “safe” dose for a regular adult may no longer be appropriate for them. This is particularly important when prescribing for the elderly and paediatric populations, as they are more vulnerable to medication-related harm.įrailty and reduced renal function are commonly seen in the elderly population. The dose required is 40 mg/kg/day divided BID and the suspension comes in a concentration of 400 mg/5 mL.Drug calculation skills are an important part of prescribing, as calculation errors may lead to significant patient harm. The following examples are typically encountered when dosing medication in children.Ĭalculate the dose of amoxicillin suspension in mLs for otitis media for a 1-yr-old child weighing 22 lb. Medications are available in multiple concentrations, therefore orders written in "mL" rather than "mg" are not acceptable and require further clarification.ĭosing also varies by indication, therefore diagnostic information is helpful when calculating doses. Doses are often expressed as mg/kg/day or mg/kg/dose, therefore orders written "mg/kg/d," which is confusing, require further clarification from the prescriber.Ĭhemotherapeutic drugs are commonly dosed according to body surface area, which requires an extra verification step (BSA calculation) prior to dosing. Care must be taken to properly convert body weight from pounds to kilograms (1 kg= 2.2 lb) before calculating doses based on body weight. ![]() Most drugs in children are dosed according to body weight (mg/kg) or body surface area (BSA) (mg/m 2). ![]()
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