QUESTIONS AND ANSWERS
3 kcauses kof kvenous kthrombosis kalso kcalled, kVirchow's kTriad k- gk-Venous kstasis,
ktrauma/endothelial kdamage, khypercoagulability
Venous kstasis k- gk-Slowed kblood kflow kin kveins. kCaused kby kimmobility, kmyocardial
kinfarction, kCHF, khypotension, kCOPD, kobesity, kpregnancy, kprevious kDVT, kextrinsic
kcompression, kSVC ksyndrome, kparaplegia, ksurgery kassociated kconditions.
2 ktypes kof kTrauma/endothelial kdamage k- gk-Intrinsic kand kextrinsic
Intrinsic ktrauma kis k- gk-Damage kto kthe kvessel kwall kfrom kintravenous kdrugs kor ka
kcatheter. kIncreased kuse kof kPICC kline kresults kin khigher kincidence kof kupper
kextremity kthrombus, kusually kdeveloping kat kmost kproximal kportion kof kPICC kline.
Extrinsic ktrauma kis k- gk-Damage kcaused kby kan kaccident, kwhich kcan koccur kat kany
ksite kof kthe kbody.
Hypercoagulability kis kassociated kwith k- gk-Pregnancy, kcancer, koral kcontraceptives
kand/or khormone kreplacement ktherapy, kinherited kstates,e.g., kfactor kV kLeiden kor
kprotein kC, kprotein kS, kor kAntithrombin kIII kdeficiency
Sensitivity, kand
How kto kcalculate? k- gk--Ability kof ka ktest kto kdetect kdisease, khow kmany ktests kare
kcorrectly kcalled kpositive.
- k# kof ktrue kpositives kdivided kby k# kof kall kpositive ktests kby kgold kstandard, kor
kTP/TP+FN
Specificity, kand khow kto kcalculate? k- gk--Ability kof ka ktest kto kidentify knormality, kor
khow kmany kresults kwere kcorrectly kcalled knegative.
- k# kof ktrue knegative kdivided kby k# kof kall knegative ktests kby kgold kstandard, kor
kTN/TN+FP
, Positive kpredictive kvalue, kand khow kto kcalculate? k- gk--percentage kof ktest kresults
kthat kaccurately kpredict kabnormality, kor kwhat k% kcorrectly kpredicted kdisease.
- k# kof ktrue kpositive ktest kdivided kby k# kof kall kpositive ktests, kor kTP/TP+FP
Negative kpredictive kvalue, kand khow kto kcalculate? k- gk-- kpercentage kof ktest kresults
kthat kaccurately kpredict knormality, kor kwhat k% kcorrectly kpredicted kabsence kof
kdisease.
- k# kof ktrue knegatives kdivided kby k# kof kall knegative ktests, kor kTN/TN+FN
Accuracy, kand khow kto kcalculate? k- gk-- k% kof kcorrect ktests, kor khow kwell kdoes kthe
ktest kboth kdetect kand krule kout kdisease.
- ktotal k# kof kcorrect ktests kdivided kby ktotal k# kof kall ktests, kor
kTP+TN/TP+FP+FN+TN
Brachiocephalic/ kInnominate kvien kformed kfrom kconfluence kof? k- gk-Subclavien kand
kInternal kjugular kvein
Vascular kdisease kmore kcommon kin kwomen? k- gk-Takayasu's karteritis-tennage kto
kyoung kwomen kmore kcommon.
FMD- kyounger kwomen.
Celiac kband ksyndrome- kyoung kathletic kwomen.
Vascular kdisease kmore kcommon kin kmen? k- gk-Obliteritis kangitis(bergers kdisease)-
kyounger k<40 kmen, kheavy ksmokers.
Popliteal kartery kentrapment ksyndrome- kyoung kathletic kmen.
Celiac kartery ksupplies kblood kto kwhat korgans? k- gk-Stomach, kliver, kpancreas,
kduodenum, kand kspleen.
Celiac kartery kbranches kinto? k- gk-Left kgastric, ksplenic, kcommon khepatic karteries.
SMA ksupplies kblood kto kwhat korgans? k- gk-Small kintestine, kcecum, kascending
kcolon, kpart kof ktransverse kcolon.
SMA klocation? k- gk-1cm kdistal kto kceliac kartery.
IMA ksupplies kwhat korgans? k- gk-Left khalf kof ktransverse kcolon, kthe kdescending,
kiliac, kand ksigmoid kcolon, kand kpart kof krectum
IMA karises kfrom? k- gk-Distal kabdominal kaorta k3-4cm kabove kaortic kbifurcation kand
kcan kact kas ka kcollateral kconnection.
May-Thurner ksyndrome k- gk-Compression kof kleft kcommon kiliac kvein kby kthe kright
kcommon kiliac kartery kas kthe kartery kcrosses kover kit, kincreases klikelihood kof kleft
kcommon kiliac kdeep kvein kthrombosis.