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A named knowledge area covering the devices used to measure and administer medications, and matching the right device to the preparation and the dose.
One of four knowledge areas in Order Entry and Processing, and among the quickest to secure.
Measuring devices
- Oral syringes, for accurate small volumes
- Dosing cups and spoons, less accurate and easier for patients
- Droppers, calibrated to a specific product
- Graduated cylinders and pipettes, in preparation rather than at home
Kitchen teaspoons vary substantially, so a Sig written in teaspoons still means 5 mL and should be measured with something calibrated. This is both a calculation point and a patient safety one, and it is the most likely equipment question you will see.
Administration devices
Inhalers and spacers, nebulisers, injection devices and pens, transdermal systems, and infusion equipment including administration sets.
The administration set is where this area meets the arithmetic: its drop factor is what converts a flow rate into drops per minute.
Matching the device to the dose
A dose of 0.4 mL is not measurable in a dosing cup. Supplying the wrong device makes an accurate calculation useless at the point of administration.
Questions here typically present a small dose and ask which device is appropriate.
Counting and preparation equipment
Counting trays, spatulas, balances and mortar and pestle. The counting tray connects directly to infection prevention, since residue transfers between prescriptions.
What the exam wants
Recognition of the devices, what each is for, and which is appropriate for a given preparation and volume. Not operational proficiency.
How long it takes
One short session. It is definitional and it does not change.
Common questions
What equipment does the PTCE cover?
Measuring devices, administration devices, and counting and preparation equipment.
Why is a household spoon a problem?
Kitchen spoons vary. A Sig in teaspoons still means 5 mL and needs a calibrated device.
How does this connect to calculations?
The administration set's drop factor converts a flow rate into drops per minute.
What do questions typically ask?
Which device is appropriate for a given preparation and volume.
How much study does it need?
One short session. It is definitional.