Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
35 Cards in this Set
- Front
- Back
|
What is optimal damping coefficient?
|
.6-.7
|
|
|
If frequency response is too low, system will be ______damped, _______estimating systolic
|
system will be overdamped, underestimating systolic
|
|
|
Underdamping leads to ______shoot and falsely ____SBP
|
overshoot; high
|
|
|
what does small amounts of dampening do to arterial wave form
|
overshoot, ringing, systolic falsely high
|
|
|
wha does large amount dampening do to arterial waveform?
|
compresses it, systolic falsely high, mean the same
|
|
|
what can cause dampin?
|
air, longer line, misaligned stopcock
|
|
|
As you move away from the aorta, the wave form systolic___ more than diastolic ______
|
systolic increases more than diastlic decreases
|
|
|
As you move further down the peripheral tree, what happens to the diacrotic notch?
|
shifts to the right
|
|
|
diacratic notch represents
|
closing of the aortic semilunar valve
|
|
|
too small of BP cuff causes falsely
|
high reading
|
|
|
when using ultrasonic dopplar system, probe is placed on the
|
radial artery
|
|
|
doppler system senses
|
red blood cell flow as cuff gets below systolic pressure
|
|
|
Doppler is used for____ and ____
|
return to flow and to find systolic
|
|
|
which parameters monior both the pt and anesthesia delivery sys?
|
Paw,Qaw, Vt, Resp Gas analysis,
|
|
|
Definition of precision
|
degree of consistency between repeated measurements of the same quantity
|
|
|
precision=
|
(measured-mean)/mean
|
|
|
Left ventricle is profused mostly during
|
diastole
|
|
|
right ventricle is profused mostly during
|
systole
|
|
|
Phases of the korotkoff sounds
|
1: snapping 2:murmurs 3:thumping 4:muffling 5:silence
|
|
|
If bp at heart is 115 mmHg, what is it 20 cm above heart?
|
20cm (.76mmHg/cmH20)=14.7; 115-15=100mmhg
|
|
|
If you increase the diameter of tubing, what happens to resonance/frequency
|
increase of resonance/frequency
|
|
|
resonance is
|
the tendency of a system to oscillate at maximum amplitude at certain frequencies
|
|
|
suggested rate for deflating a BP cuff
|
3mmHg per heart rate
|
|
|
What are the most sensitive leads for the detection of ventricular ischemia?
|
V4, V5
|
|
|
In NIBP MAP is measured by
|
maximum amplitude
|
|
|
how are systoic and diastolic measred in NIBP?
|
calculated from MAP
|
|
|
characteristics of an overdamped arterial BP system
|
squished, rounded, not sharp; looks like sine wave; will look like damped one
|
|
|
which pressure do we look for to indicate tissue perfusion?
|
MAP
|
|
|
A MAP of ______is necessary for cerebral perfusion and ___ for kidney
|
60; 70
|
|
|
vascular wall tension is represented by
|
systolic
|
|
|
which is the reference lead?
|
right leg
|
|
|
the reference lead (right leg) picks up____Hz which is the
|
60 hz (common mode rejection and feeds back from pt into cables, cancels out interference
|
|
|
Pressure inside cuff oscillates with ____
|
Heart rate
|
|
|
Physiological variations that cause errors in NIBP readings
|
Shock, large variations in pressure,(step or cyclic); atrial fib.
|
|
|
describe types of pressure changes required for errors in NIBP errors
|
10-15mmHg in 4-15sec; beat to beat variation 10-50mmHg in several beats; variation in pulse rate; >15% beat to beat
|
