By the end of this lesson, the learner should be able to: - Explain how chest tubes restore negative intrapleural pressure and support lung re-expansion. - Identify the purpose of the collection chamber, water seal chamber, suction control chamber, tubing, and drainage unit. - Interpret tidaling, intermittent bubbling, continuous bubbling, sudden drainage changes, and absent drainage. - Prioritize routine care, troubleshooting, emergency interventions, removal monitoring, and client teaching. - Apply RN, PN/RPN, REx-PN, CPNRE, and NP-level reasoning without drifting into unnecessary procedural detail for the wrong tier. On the exam, writers often pair stable-sounding options with unstable data—notice the mismatch before you commit. If the stem names a license or role, reread that line; scope errors are classic trap answers even when the clinical topic is familiar. Run a 60-second scan: breathing work and oxygenation, perfusion and end organs, neuro baseline, likely infection sources, and devices that can fail quietly. When two answers feel partly right, pick the one that reduces imminent harm and matches orders for the role you were given. Train yourself to state the primary risk in...