Drainage

The exam loves the expected-trend trap: drainage that becomes less serosanguineous and decreases over postoperative days is normal, so the wrong answer panics over a small amount of pink-tinged fluid. The classic JP/Hemovac “tell” is loss of suction — a re-expanded bulb means the vacuum is gone, so the right action is to empty, fully compress, and recap while squeezed to restore negative pressure, not to clamp or irrigate. For chest tubes the priority shifts: continuous bubbling in the water-seal chamber signals an air leak (intermittent bubbling can be normal with a pneumothorax), while sudden cessation of drainage with worsening dyspnea suggests an obstructing clot or kink — assess the tubing, never clamp a chest tube (risk of tension pneumothorax).

Don’t confuse drainage with its related terms. Hemorrhage is the volume-and-vital-signs emergency (rising HR, falling BP); drainage is the quantitative early clue that often precedes it. Monitoring is the umbrella skill of trending; drainage is one tracked output. A catheter can be the drainage conduit, but its signature risk is CAUTI, not blood loss.