3: Bleeding Disorders Flashcards
What is a bleeding disorder
abnormal Haemostasis that can result in diathesis
What coagulation pathway does PT look at and how is that remembered
Extrinsic
Personal trainers focus on extrinsic appearance
What factors comprise the extrinsic pathway
TF, 7, 10, 5, 2, Fibrinogen
What disorders can cause only PT to be raised
- Heparin
- Von Wille Brand Disease
What coagulation pathway does the APTT look at
intrinsic
What factors make up the intrinsic pathway
12 11 10 9 8 5 2
What 3 disorders cause raised isolated APTT
- Haemophilia A
- Haemophilia B
- Antiphospholipid syndrome
What causes raised APTT and PT
DIC
Liver disease
Vitamin K deficiency
What factors are vitamin K dependent
1972
What is the inheritance pattern of haemophilia A
X-Linked recessive
What factor does haemophilia A affect
F8
Is haemophilia A or B more common
Haemophilia A (80%)
Explain presentation of haemophilia A
- Haemoarthrosis (bleeding into joints)
- Bleeding into muscle
- Bleeding into soft tissue
What does petechial bleeding indicate
Platelet deficiency - not clotting factor
What will be seen on coagulation studies in haemophilia A
Prolonged APTT