Abstract: Objective By explore the role of serum soluble Fas (sFas) in occurrence and progression of delayed encephalopathy
after acute carbon monoxide poisoning (DEACMP). Methods Enzyme-linked immunosorbent assay (ELISA) was used to
detect serum sFas levels in 40 patients with DEACMP in acute stage and convalescent stage, with 36 healthy elderly subjects as
the control group. Results Serum sFas levels of the patients with DEACMP in both the acute and convalescent stages showed
no significant difference from those in the control group (P=0.737 and 0.137, respectively), nor was any significant difference
found between the patients in acute and exacerbation stages (P=0.059). Conclusion Serum sFas is not involved in the
occurrence and progression of DEACMP.