Factor
Identification by Substitution - 3
Case study:
A patient presented in ER
complaining of bleeding in mouth and having prolonged nose bleeds. The following tests were performed:
PT = 13 sec. (10-15
sec)
aPTT = 60 sec. (25-38
sec)
BT = 5 min. (<10
min.)
Substitution tests performed using
aPTT:
Patient plasma + normal
plasma = 40
sec.
Patient plasma +
absorbed plasma = 39 sec.
Patient plasma + aged
serum = 70
sec.
So what’s wrong Doc?