pathopharm 1 drugs mod 6 Flashcards
class: heparins
-heparin
-enoxaparin (low molecular wt heparin)
heparins MOA
prevents clotting by activating antithrombin -> indirectly inactivates thrombin & factor Xa (we inactive factor VII, X and thrombin in the extrinsic pathway & XII, XI, IX,X, and thrombin in intrinsic pathway ) inhibits fibrin formation (LMWH only inactivates factor Xa, not thrombin)
how is heparin given
IV or sub q injections
heparin indications
conditions necessitating prompt anti coagulant activity like stroke, PE, massive DVT, MI
LMWH indication
prophylaxis against post op DVT
how is heparin dosed
wt based always in KG & labs: aPPT or anti Xa
heparin nursing considerations
-rapid onset
-use cautiously in pt w/ spinal or epidural anesthesia bc increased risk for hematoma
-high risk med
-monitor signs for bleeding
must double check w/ another RN for rate changes or boluses
heparin SE
-bleeding
-hematoma
-anemia
-thrombocytopenia
heparin antidote
protamine sulfate (SE: hypotension)
do you need to do all the lab monitoring for LMWH
no
LMWH SE
-bleeding
-thrombocytopenia
-HIT
LMWH antidote
protamine
LMWH nursing considerations
-only injectable, no IV
-can be given at home, pre dosed
-use cautiously in pts w/ spinal or epidural anesthesia
do not give w/ heparin
BBW: potential spinal hematoma if pt has epidural catheter
warfarin MOA
vitamin K inhibitor -> prevents the synthesis of factors VII, IX, X & prothrombin
warfarin indications
prevention VTE/DVT/PE, thrombotic events for pt w/ Afib or heart valves, reduce recurrence of TIA or MI
warfarin SE
-bleeding
-lethargy
-muscle pain
-purple toes
warfarin antidote
vitamin K
warfarin nursing considerations
-can’t give to pregnant or breast feeding women
-hold before surgeries
-lab monitoring
-many drug & foods interactions (dark leafy greens)
-avoid alcohol
-once a day @5pm
apixaban & rivaroxaban MOA
direct inhibitor of factor Xa
apixaban & rivaroxaban indications
prevent strokes in pt w/ afib, post op thrombo-prophylaxis, treat DVT & PE