A client prescribed more than 200 units of insulin daily is due for Humulin R U-500 150 units subcutaneously using the dedicated KwikPen. The nurse performs the final check shown. Click the component that must be corrected before administration.

C. C must read 150 units. The dedicated pen window displays actual insulin units and requires no dose conversion.

The U-500 concentration does not mean dividing the ordered unit dose by five on this pen. A displayed 30 would deliver 30 units, an underdose relative to the 150-unit prescription. Use the prescribed unit setting and follow the device instructions; do not withdraw insulin from the pen into a syringe.

The observations are fictional teaching data. Apply the stated context; the selected feature does not by itself replace a complete bedside assessment.

A dedicated U-500 pen displays the actual number of units to inject.

A dedicated U-500 pen displays the actual number of units to inject.

A is the prescribed U-500 product. B records appropriate appearance, expiry and single-patient assignment. D is a newly attached pen needle. None of these resolves the incorrectly dialed dose.

• U-500 pen units versus a concentration-conversion error — A dedicated U-500 pen displays the actual number of units to inject.
• Comparison with context — The concentration label may tempt a fivefold conversion, but the device already meters actual units.