Final Sweep 1 Flashcards
Aspirin—irreversible —— inhibitor
cyclooxygenase - can lead to excessive bleeding - antiplatelet drug
ADP receptor inhibitors
(clopidogrel
<20,000
spontaneous bleeding
<50,000
bleed excessively with minor trauma
Vitamin K antagonist -
coumadin/warfarin. Will work on liver to prevent synth of vitamin K clotting factors (yellow circles here)
Von w. diseazse
Missing or defective von Willebrand factor, a clotting protein
Most common bleeding disorder, 1% of US population
VW disease
von Willebrand Factor—
Platelet Adhesion
Binds platelets to exposed collagen (adhesion) Binds platelets to platelets (aggregation)
von Willebrand Factor—
Factor VIII Chaperone
Binds circulating factor VIII
Unbound factor VIII is destroyed
Management of vWD
Desmopressin (DDAVP), replacement therapy with vWF- containing concentrates, and antifibrinolytic therapy
Desmopression (DDAVP)
Stimulates the release of vWF from endothelial cells Increases plasma factor VIII and vWF levels
Antifibrinolytic Therapy
Aminocaproic acid and tranexamic acid Prevent the dissolution of the hemostatic plug Oral and IV formulations
vWD Type 1 and most type 2 can be treated as
outpatient Pre-op: desmopressin
Post-op: antifibrinolytic therapy
Local measures—primary closure if possible
Acetaminophen or acetaminophen-opioid combos for analgesia
Hemophilia A
Inherited —— deficiency
factor VIII
Normal homeostasis requires at least —- factor VIII activity
30%