A client has a chest tube for a resolving pneumothorax. After turning the client, the nurse compares the chamber behavior with the previous assessment. Click the chamber whose changed behavior supports assessment for a new air leak.

B. B now bubbles throughout the breathing cycle, a change from bubbling only with coughing.

The water seal is the chamber used to monitor air movement from the patient or a leak in the circuit. New ongoing bubbling warrants assessment of the patient, insertion site and system. Gentle bubbling in the separate wet suction-control chamber is expected when suction operates. Do not routinely clamp the chest tube to perform this check.

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

Interpret bubbling by chamber function and change from the prior observation.

Interpret bubbling by chamber function and change from the prior observation.

A shows a small recorded increase in collection volume, not evidence of air movement. C has the same gentle suction bubbling as before. D is documented secured; inspect the system as part of assessment, but the changed indicator asked about is B.

• Changed water-seal behavior versus expected wet suction — Interpret bubbling by chamber function and change from the prior observation.
• Comparison with context — C has visible ongoing bubbles as well, but their chamber function and unchanged behavior differ.