Summary
In sepsis, binding of factor VII (FVII:C) and activated factor VII (FVIIa) with tissue
factor is the key step of coagulation resulting in disseminated intravascular coagulation
(DIC). We conducted a prospective cohort study among 47 septic patients, aged 8 months
to 18.8 years. They were initially divided into three groups of no DIC (n=27), non-overt
DIC (n=14) and overt DIC (n=6). Blood samples were collected at 0, 24 and 48 hours
(h) after the onset of sepsis. At the onset of sepsis, FVII:C tended to be lower in
the non-overt DIC [median 57% (interquartile range [IQR] 41–80)] and overt DIC groups
[33% (23–52)] than that in the no DIC group [65% (44–87)]. Whereas FVIIa tended to
be lower in the overt DIC group [1.29% (0.50–4.19)] than those in the non-overt DIC
[3.01% (1.01–5.24)] and no DIC groups [2.49% (1.14–3.13)]. At 24 h, FVII:C was significantly
lower in the non-overt DIC [57% (41–101)] and overt DIC groups [31% (28–49)] than
that in the no DIC group [83% (70–102)]. While FVIIa was significantly lower in the
overt DIC group [2.15% (0.86–3.96)] than that in the no DIC group [3.83% (2.90–5.46)].
Using FVII:C <65% or FVIIa <3% at 24 h among patients without hepatic dysfunction
to determine overt DIC at 24 h, the sensitivity was 83.9% and 77.4%, respectively,
and the specificity was both 83.3%. Patients with low FVII:C and low FVIIa at 24 h
after the onset of sepsis had a 20.8-fold (95% confidence interval [CI], 2.0–213.0,
p=0.010) and 14.4-fold (95%CI, 1.5–142.4, p=0.023) chance of overt DIC.
Keywords
Activated factor VII - factor VII - sepsis - disseminated intravascular coagulation
- paediatric patients
