Preview content might not be up to date. For full access to the live content, checkout our Pricing page.
Section 5 - Calculation Skills
Introduction
This section focuses on performing calculations related to medical prescribing, such as determining required doses, infusion rates, and dilutions. Many candidates find this section anxiety-inducing, as medical students and doctors have not regularly encountered mathematical problems during their studies. Typically, the questions involve several steps of calculation.
Being proficient in these calculations is crucial not only for the Prescribing Safety Assessment but also for clinical practice, as errors in medication calculations can have serious consequences. The types of questions that can be asked are limited, and we will go through each type with examples and strategies to tackle these calculations effectively.
| Question Style | Type in your answer |
|---|---|
| Total Questions | 8 |
| Marks per Question | 2 (Total of 16 marks) |
| Advised Time per Question | 1 min 30 seconds |
Example Question
Case presentation
A 77-year-old woman returns to the orthopaedic ward 2 days after discharge following a total knee replacement. She is found to have a wound infection and is to be treated with vancomycin 1 g 8-hourly.
Prior to administration, vancomycin needs to be diluted with sodium chloride 0.9% to a concentration not exceeding 5 mg/mL.
Prescribing request
What is the minimum volume (mL) to which each dose of vancomycin should be diluted?
(Write your answer in the box provided.)
Source: PSA
Tips for This Section
🚫 This section is not available in the preview.
Get exclusive tips, tricks, and high-yield strategies for mastering each and every section of the PSA!
✅ Developed by doctors & top scorers
✅ Tailored exam-focused techniques
✅ Access anytime, anywhere, on any device
🔓 Access the full guide now
How to Approach This Section
🚫 This section is not available in the preview.
We provide tailored learning material for each and every PSA section, developed by doctors and top-scoring candidates to help you succeed. Get structured guidance on how to break down questions, avoid common pitfalls, and apply effective answering techniques to maximize your score.
Unlock full access to gain expert insights and streamline your preparation!
🔓 Access the full guide now