VTE + PE Flashcards
(31 cards)
what score is used in suspected PE
wells
features DVT scoring system
cancer // recent paralysis of lower legs // recently immobile // tenderness // swollen leg // >3cm than other leg // pitting oedema // collateral superficial veins // previous DVT
what score indicates DVT is likely
2 or more
invx if likely DVT
proximal leg USS within 4 hours
invx if initial USS likely DVT negative
D dimer
mx if USS for likely DVT not possible in 4 hours
D dimer and start DOAC
mx of likely DVT if -ive USS but +ive DDimer
stop DOAC –> repeat USS 7 days later
invx unlikely DVT
D dimer within 4 hours (if unavailable give DOAC) –> if +ive –> USS (if not in 4 hours give DOAC)
1st line mx DVT
DOAC eg apixaban or rivaroxaban
mx DVT in renal impairment
LMWH, unfractionated heparin, or LMWH –> warfarin
mx DVT APS
LMWH –> warfarin
how long is treatment given in DVT
3 months if provoked // 6 months unprovoked
features PE
pleuritic pain // SOB // haemoptysis // fast HR + RR
PE resp exam
clear chest + normal CXR
common clinical signs PE according to PEIPOD study
RR >16 // crackles / tachycardic // fever >37.8
what is Pulmonary embolism rule-out criteria
all criteria must be absent to rule out PE (reduced chance to <2%)
scoring system PE + criteria
signs of DVT // top differential // tachycardia // immobile (3 days, surgery past 4 weeks) // previous DVT or PE // haemoptysis // cancer
what score incidcates PE is likely
wells >4
invx likely PE
CTPA (if delayed start DOAC)
invx PE if CTPA -ive
leg USS
invx unlikely PE
D dimer // if positive –> CTPA // if negative –> stop DOAC
when is CTPA condraindicated
renal impairment –> V/Q scan
ECG PE
S wave lead I + Q wave lead 3 + inverted T lead III (S1,Q3,T3) // RBBB /// sinus tachy
CXR PE
normal or wedge opacification