OnlineMedEd Shared "Hematology Oncology - Bleeding" - 6 Picmonics
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Hematology Oncology - Bleeding
Von Willebrand Disease
- Mixed platelet and coagulation disorder
- Mechanism
- Autosomal Dominant Condition Leading to Reduced vWF
- Defect in platelet plug formation
- Labs
- Increased Bleeding Time
- PTT increased
- Factor VIII decreased
- Normal platelet count
- Treatment
- DDAVP (synthetic vasopressin)
1 min
Bernard-Soulier Syndrome
- Mechanism
- Autosomal Recessive
- Deficiency of Glycoprotein Ib (GpIb) Receptor
- Symptoms
- Mucosal Membrane Bleeding
- Menorrhagia
- Easy Bruising
- Labs
- Large Platelets
- Increased Bleeding Time
- No Platelet Agglutination with Ristocetin
3 mins
Glanzmann Thrombasthenia
- Pathophysiology
- Autosomal Recessive or Acquired as an Autoimmune Disorder
- Deficiency of Glycoprotein IIb/IIIa (Gp IIb/IIIa) Receptor
- Defective Platelet-to-Platelet Aggregation
- Symptoms
- Mucous Membrane Bleeding (Gingival Bleeding)
- Easy Bruising
- Increased Bleeding Time
- Normal Platelet Count
- Considerations
- Avoid NSAIDs
2 mins
Warfarin
- Mechanism of Action
- Interferes with Vitamin K-dependent Clotting Factors
- Extrinsic Pathway
- Bridge with Heparin
- Indications
- Chronic Anticoagulation
- Side Effects
- Bleeding
- Necrosis
- Cytochrome P450
- Contraindications
- Pregnancy
- Antidote
- FFP + Vitamin K
2 mins
Vitamin K
- Sources
- Dark Green Leafy Vegetables
- Synthesized by Intestinal Flora
- Mechanism
- Activated by Epoxide Reductase
- Gamma Carboxylation of Glutamate
- Activation of Clotting Factors II, VII, IX, X, Protein C and S
- Considerations
- Deficiency with Broad Spectrum Antibiotics
- Neonatal Hemorrhage with Increased PT and aPTT
- Warfarin is a Vitamin K Antagonist
4 mins
Vitamin K1 (Phytonadione)
- Mechanism
- Synthesizes Clotting Factors II, VII, IX, X
- Indications
- Hypoprothrombinemia
- Newborn Prophylaxis
- Bleeding from Warfarin Overdose
- Side Effects
- Shock
- Kernicterus
- Cardiac Arrest
- Considerations
- Bile Salts required for Intestinal Absorption
- Increased Risks with IV Administration
2 mins
