Is it more like me putting down a sudoku puzzle in front of you that only has 5 squares filled in or more like dumping a jigsaw puzzle out but hiding a piece?

used for cystic fibrosis patients? clearing lungs?

(It's for extracting liquids)

(Or inserting them)

Here is a photo of a similar apparatus in use:




(Or is that Michael H. Kenyon?)

(Pleurisy)

What'd you call me?

That poor guy is getting a primitive dailysis or kidney draining or something horrible.

(Pulmones !!)