Cannulas

Question 1

a vs v cannula differences

Answer 1

v- more drainage holes
not completely wire coil enforced

Question 2

crescent types

Answer 2

bicaval or RA

RA only in infants!!!
bicaval in adults/peds

arterial or return always on top
drain on the bottom

Question 3

crescent RA

Answer 3

VV
single site
inserted via IJ

drains ra
returns ra towards tricuspid valve

wire reinforced almost to tip
gold ring on distal end

radiopathic dots
3 triangle above reinfusion port pointing to direction of flow
1 at tip end

tip terminates in mid RA

Question 4

crescent bicaval

Answer 4

VV
inserted via IJ
single site- double lumen
drains ivc/svc
returns anteriorly towards tricuspid valve

Question 5

VA configurations (4)

Answer 5

groin-neck
drain R femoral vein
return R common carotid artery

fem-fem
drain R fem vein
return L fem artery

neck
drain RIJ vein
return R common carotid artery

transthoracic
drain ra/rv
return ascending aorta

Question 6

VV configurations (3)

Answer 6

fem fem
drain IVC via femoral vein
return RA femoral vein

groin- neck
drain ivc via femoral vein
return RA via RIJ vein?

single site- double lumen
drain svc/ivc
return ra/tricuspid

Question 7

gold standard for cannula placement/function

Answer 7

echo

Question 8

complications

Answer 8

perforation

if cannot flow during initiation, it is malpositioned

cardiac tamponade s/t atrial or ventricular perf

migration

recirc

thrombus, occlusion, turbulence

cannula fracture

Question 9

daily surveillance

Answer 9

cxr
skin to coil
securement

Question 10

o/ methods to eval placement

Answer 10

p trends (pre/post)
flow trends
fluro