label: Monitor for proper functioning of device, correct placement in the pleural space, and tube patency (i.e., respiratory swing or fluid oscillating as patient breathes, either in tube or at the fluid meniscus)
label_lc: monitor for proper functioning of device, correct placement in the pleural space, and tube patency (i.e., respiratory swing or fluid oscillating as patient breathes, either in tube or at the fluid meniscus)