This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vascular surgery, Subject name: Surgery
Which of the following statements is true regarding fat embolism 
Select and explain. 
A. Most patients with major trauma involving long bones have urinary fat globules, B. All patients with urinary fat globules develop fat embolism, C. Peak incidence of respiratory insufficiency for pulmonary fat embolism is around day 7 after injury, D. Heparin as an anti coagulant decreases moality and morbidity in fat embolism syndrome
A: Most patients with major trauma involving long bones have urinary fat globules
Answer: A: Most patients with major trauma involving long bones have urinary fat globules 
Explanation: . Fat embolism is common in fracture of long bones,multiple fractures.It is also observed after intramedullary nailing,liposuction,joint reconstruction,parentral lipid infusion,cardiopulmonary bypass and pathological fractures. Refer page no 194 of SRB's manual of surgery 5 th edition.