Hemodynamics Part II: embolism Flashcards Preview

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Flashcards in Hemodynamics Part II: embolism Deck (16):
1

define embolus

a detached intravascular solid, liquid or gaseous mass that is carried by the blood to a site distant from its point of origin

2

sources for arterial emboli

atrial fibrillation
mitral stenosis- brain
endocarditis
mural thrombi in heart or aorta
paradoxical emboli

3

systemic thromboembolism

emboli that migrate within the arterial circulation

most likely intracardiac mural thrombi

4

define mural thrombi

arterial thrombosis in cardiac chambers due to MI, ulcerated aterosclerotic plaqu or aneurysmal dilation

5

define paradoxical embolism

rare condition in which an embolus originating from venous circulation passes through an itner-atrial or inter-ventricular defect to gain access to the systemic circulation

6

where do 95% of pulmonary thromboembolism arise from?

deep leg vein thrombi above level of knee

7

define saddle embolus

pulmonary embolus that lodges across vessel bifurcation and causes sudden death

8

fat globules in the circulation are common due to (3)

fractures of long bones
soft tissue trauma
burns

9

what does an oil red O stain indicate?

fat embolism (fat in capillaries)

10

what type of embolism would be indicated by a diffuse petechial rash?

fat embolism

11

due to air in the circulation resulting from obstetric procedures and chest wall injury

air embolism

12

describe decompresssion sickness

nitrogen inspired at high pressures dissolves in blood and tissues in greater amounts than at atmospheric pressure. If there is a rapid decrease in pressure (decompression) nitrogen bubbles form in the circulation to form gas emboli

13

define the bends

painful formation of gas bubbles in skeletal muscels and supporting tissues in and around joints

14

define the chokes

gas emboli in lungs cause edema, hemorrhage atelectasis and emphysema causing respiratory distress

15

breach in placental membranes and uterine veins causes infusion of amiotic fluid into maternal circulation

amniotic fluid embolism

16

what do amniotic fluid emboli consist of?

epithelial cells from fetal skin
lanugo hair
fat from venix caseosa
mucin from fetal respiratory and gastrointestinal tract