9. “group of disorders occouring due to
heriditary deficiency of coagulation”
Characterized by bleeding tendency &
increased clotting time.
Hemoplilia A – 83% cases
* FactorVIII (Classic Hemophilia)
Hemophilia B – 15% cases
* Factor IX (Christmas disease)
Hemophilia C – 2% cases
* Factor XI (PTA deficiency)
10.
11.
12.
13.
14. TESTSTHAT DETECT
DEFECTS INTHP
Bleeding time
Capillary fragility test
Platelet aggregation test
Platelet adhesiveness test
TESTSTHAT DETECT
DEFECTS IN DHP
Clotting time
Prothrombin time
Prothrombin
consumption time
Partial thromboplastin
time (PTT)
Activated partial
thromboplastin time
(aPTT)
Thrombin time
Clot retraction time
15. Time lapse between the skin prick and
arrest of bleeding
Estimated by Duke’s method & Ivy’s
method
Normal values
by Duke’s method – 1-6 min.
by Ivy’s method – 3-6 min.
BT is prolonged in Purpura & normal in
Hemophilia
16. Time between skin prick & formation of
first fibrin thread
Estimated by Capillary tube method & Lee-
White method
Normal values
by capillary tube method is 3-6 min.
by lee-white method is 8-12 min.
Prolonged in hemophila
17. Quick’s one stage method
Commercially available tissue
thromboplastin & CaCl2 is added to
oxalated or citrated plasma – incubated at
37oC
Normal value is 11-16 sec.
Extrinsic system is tested here.(no platelets
involved)
Used to monitor anti-coagulant therapy
Increased in liver failure, vit K deficiency
18. Also known as KCCT – Kaolin cephalin
clotting time.
Detects minute coagulation defects
Normal is 40 sec.
Measures intrinsic pathway
Used to monitor Heparin therapy
Is prolonged in Hemophilia, vWD
19. Measures final step in coagulation i.e,
availability of functional fibrinogen
Normal is 10 sec.
Is prolonged in hypofibrinogenemia,
dysfibrinogenemia, DIC & hepain therapy.
20. Measures time needed for contraction of an
undisturbed clot.
Indicates function & number of platelets
Normally begins within 2 hours and
completed within 24 hours
Is retarded in thrombocytopenia
Clot is small & soft in thromboasthenia