Definitely sounds like homework but I'll play.
I understand the general explanations, but what is the exact mechanism, ie choking, what would be the name of the vessel that ruptured....or lead vessel that typically would be suspected of rupture?
There's lots of vasculature in your airway, oro/nasopharynx, and esophagus that could cause bleeding. It's not going to be a specific vessel every time.
I'm not really understanding your question.
Look up the pathophysiology behind varcies.
Gastric ulcers causing vomiting resulting in aspiration...digested blood in the airway.
Severe epistaxis (secondary to a Hypertensive crisis, dryness, drug use, whatever it may be) resulting in vomiting and, again, aspiration or just plain old aspiration in a patient who cannot protect their own airway. A few years back a medic here had a a women completely A&O suck a clot out if her nose and down into her airway when she sniffled causing a total occlusion ending in her death because they were unable to relieve the obstruction.
You could argue that pulmonary edema is "blood in the airway." Not exactly but similar. Things move from the high pressure gradient to the lower pressure gradient to attempt to create equilibrium. High pressure in the pulmonary vasculature causes fluid to diffuse across the capillary membrane into the alveoli (very simple explanation).
I've got a fun one that I had the other day, airway nightmare...A Mallory Weiss tear.
I personally would consider choking a traumatic injury to the airway. It's causing trauma which is bleeding but that's just my opinion. An esophageal obstruction could cause bleeding and aspiration but I'd consider that traumatic as well.
Alright I'm out of ideas.
Why such a hard on for suction? Suction does not maintain airway, suction may clear the airway. Your OPA, NPA, Rescue device, ET maintains the airway.
You really think an NPA or OPA is going to protect an airway with an active hemorrhage in it?
Really?
Suction is a
key component of airway control, especially with BLS airway adjuncts. Why do you think trach and long term intubated patients have a soft suction catheter with a sterile sheath built into the vent circuit?
Try and BLS a messy airway without suction and let me know how that works out for you.