PLAX Doppler Protocol Flashcards
order of doppler
2d
colour
spectral
colour tells you if its ____ or ____
leaking
stenotic
colour is quantitative or qualitative
qualitative
spectral quantifies both normal and abnormal ____ in the heart
flows
spectral is quantitative or qualitative
quantitative
normal flow through the AV will travel ___ the probe (PLAX)
towards
AS has increased velocities travelling _____ the probe and will be ____ in colour and ___ (PLAX)
towards
red
alias
AI is backward valvular flow and with be travelling _____ the probe (PLAX)
away from
FR has to be
more than or equal to 20Hz
PLAX AV Colour box should cover from _____ to ____
LVOT
AV leaflet tips (pre-valve)
PLAX view is good for assessing ______ heading back to the ____ (colour?)
mitral regurgitation jets
atrium
blue
why don’t we use spectral at PLAX MV to assess MV inflow
almost perpendicular which isn’t good (we want 0 degrees)
the most common use of colour on the TV is to assess (PLAX)
TR
TR or backward flow will be travelling ____ the probe and will appear ____
away from
blue
is PW doppler normally done on the TV? why/why not
no
TV stenosis is very uncommon
inflow valves not used to assess normal function
the main purpose of the TV CW image is to ____ the TR jet in order to give us information about the _______ and ____
quantify
pressure in the lungs
right heart
what do we measure of the TV CW trace and will it be above or below baseline
peak TR velocity
below baseline
RVSP = (formula/stands for)
right ventricular systolic pressure (lung pressure)
RVSP = 4(peak TR vel)^2 + RAP
RAP
right atrial pressure
PLAX TV CW has baseline ____ from the ___
1/3-1/4
top
PLAX TV CW scale below baseline should be
240cm/sec
if spectral gains too bright = ____, too dark=_____
over estimation
lost info
when is measuring TR needed
when there is a measurable jet with a parabolic shape
what is the measurement for TR in the calc package called
TR Vmax
normal RVSP
less than or equal to 35mmHg
do you attempt to measure an inadequate TR jet (spectral)
no
Measure TR jet at the ______ (_____) not the _____ (____)
strongest signals
chin
weak ones
beard
the beard effect can be minimized by increasing the ____
reject
is it okay to have some background noise for spectral CW of the TV
yes occasionally as long as its not too much
Will we take any PLAX PV View Doppler in lab
no we will do it in PSAX but it can be done in PLAX too (site dependent)
