A postoperative client is learning incentive spirometry. The client’s coached baseline volume is 1,500 mL. The plan requires at least 80% of that volume with a slow sustained inhalation, keeping this device’s flow marker in the shaded window. Click the attempt that meets both goals.

C. C reaches 1,300 mL while the flow marker remains inside the slow-flow window.

The volume target is 1,500 × 0.80 = 1,200 mL. A higher inspired volume is not sufficient if obtained with an overly rapid inhalation. Read the piston against the volume scale and the separate flow marker against the target window. C is the displayed attempt satisfying both conditions.

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

Assess maneuver quality as well as the largest number achieved.

Assess maneuver quality as well as the largest number achieved.

A has acceptable flow but reaches only 600 mL. B reaches 1,500 mL and D reaches 1,800 mL, but both markers are above the slow-flow window. Their greater volumes do not meet the technique requirement.

• Inspired volume and flow must both meet the coached maneuver — Assess maneuver quality as well as the largest number achieved.
• Comparison with context — D has the largest volume but fails the independent flow condition.