A patient may die of blood aspiration following or some time after a medical procedure. It is important to identify the source of the hemorrhage.

Risk factors for asphyxia:

(1) massive hemorrhage

(2) clot formation that blocks the airway.


Risk for blood aspiration from a site above the lungs:

(1) head and neck trauma or surgery

(2) unprotected airway

(3) vascular malformation or aneurysm


Risk factors for intrapulmonary hemorrhage:

(1) bronchovascular fistula

(2) arteriovenous malformation or aneurysm

(3) biopsy or transection of a large blood vessel

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