Fat embolism can be caused by: (LQ)
|A||Subclavian vein catheterization|
|C||Fracture of long bones|
|D||Incised wounds of lower cervical region|
Fracture of long bones
Fat Embolism: The causes of fat embolism are-
a. Fracture of a long bone.
b. An injury to adipose tissue which forces liquid fat into the damaged blood vessels.
c. Injecting oil into circulation, e.g. in criminal abortion.
i. The presence of fat droplets in the blood stream indicates that the injury was produced during life, except in case of burning and advanced putrefaction.
ii. If the emboli enter the pulmonary vessels and obstruct, death may occur due to severe dyspnoea in about 30 hours after the trauma.
iii. 12 – 120 mlQ of free fat causes embolic death.
iv. The diagnosis is made by microscopic examination of frozen section of the lungs.
Stain for fatQ:
a. Sudan III b. Scharlach R c. Osmic acid. d. At autopsy,
petechial haemorrhages are seen in the white matter of the brain, and appear as a ring of RBCs around a necrotic zone of brain tissue in the centre of which lies a small arteriole plugged by a fat embolus.)