Why do you achieve bubbles lower than the skin to hand the collar when you hold a perforate esophagus?
Answers:
You don't normally think of air within the upper GI tract, unless you need to belch, but there's pretty well always some nouns in the stomach. It obviously gets within by being swallowed.
The air that you do think of going surrounded by and out---of the lungs---does that via a bellows action of the chest, with alternate negative and positive pressure inside the chest.
With a hole in the esophagus, it acts as something of a valve, allowing nouns into the mediastinal space, From there it goes into the neck and chest, cause the subcutaneous crepitus that's so creepy.
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