Bleeding Disorders Flashcards
What are involved in the Normal Haemostatic Mechanisms?
- Vessel Wall
- Platelets
- Von Willebrand Factor
- Coagulation Factors
What is involved in the Primary and Secondary Haemostatic Response?
Primary;
- Platelet Plug Formation
- Platelets, vWF, Wall
Secondary;
- Fibrin Plug Formation
What is important to assess when faces with Haemorrhagic Diathesis (Bleeding tendencies)
Any quantitative or qualitative abnormality
Inhibition of function
- Platelets
- vWF
- Coagulation factors
**Sometimes accompany hepatic failure. Impaired synthesis of clotting factors, reduced clearance of the products of the clotting process, and metabolic abnormalities affecting platelet function can affect normal clotting, individually or in combination.
REVIEW!
What should you establish in a Bleeding History?
- Has the patient actually got a bleeding disorder
- How severe is the disorder?
- Pattern of Bleeding
- Congenital or Acquired
- Mode of inheritance
What else would you ask in the History of Bleeding?
- Bruising (Mucosal, easy bleeding?)
- Epistaxis
Response to challenges
- Post-surgical bleeding
- Dental extractions
- Menorrhagia (Start when period started or later in life (different cause))
- Post-partum haemorrhage (Surgery or Dentist?)
- Post-trauma
What tool do we use to help diagnose Bleeding severity?
ISTH Bleeding Assessment Tool Score
Used to diagnose how significant the bleeding is, the severity and if it’s appropriate for the trauma caused
What should you ask about in the “Pattern Of Bleeding” History?
Platelet type:
Mucosal Bleeding? (More in line with primary, haemostatic, von willebands)
- Epistaxis
- Purpura
- Menorrhagia
- GI
Coagulation Factor:
Articular?
- Muscle Haematoma
- CNS
What is this? INSERT PICTURE
Bruising in petechial rash - low platelets. Need urgent platelet count, will be low
What is this? (INSERT PIC)
Knee haemarthrosis, knee haemophilia, bled into knee
What is this? (INSERT PIC)
Rectus Sheath Haematoma - Seen in warfarin and if over anti-coagulated or haemophilia
What is this? (INSERT PIC)
Intracranial Haemorrhage in Haemophilia - Very rare now with good care
What do you want to ask in “Congenital or Acquired?”
- Previous Episodes ?
- Age at first event
- Previous surgical challenges
- Associated History
If you think the disorder is Hereditary what should you establish?
- Family members with similar history
- Sex (or inheritance patterns)
What kind of inheritance is this? INSERT PIC
Autosomal dominant (von Willebrand’s)
What are the features of haemophilia A and B?
- X-Iinked
- Identical phenotypes
- 1 in 10,000 (A) and 1 in 60,000 (B)
- Severity of bleeding depends on the residual coagulation factor activity
- <1% Severe (Have to have very low factor level for this)
- 1-5% Moderate
- 5-30% Mild (Start to develop symptoms when 1 year old)
