test 1 electric/hemo hw

Question 1

when catheter is too deep seated and receives backward pressure from the myocardium

Answer 1

ventricularization of the coronary artery

Question 2

20 mmhg cardiac pressure recording too low. where was the transducer zeroed?

Answer 2

10 in above pt mid chest. (+2mmHg for every inch above level)

Question 3

the usual sweep speed for displaying pressure recordings is

Answer 3

10 sec

Question 4

another name for string gauge is

Answer 4

wheatstone bridge

Question 5

adding extra lengths of tubing will cause

Answer 5

drop in pressure

Question 6

balancing is also known as

Answer 6

zero

Question 7

AO-RV-PA is this pullback or insertion?

Answer 7

insertion

Question 8

PA-RV-AO is this pullback or insertion

Answer 8

pullback

Question 9

high frequency filter can cause damping

Answer 9

false

Question 10

arterial have triangular which have sine waves

Answer 10

none

Question 11

time shifting the pcw waveform is useful to ensure accuracy when measuring

Answer 11

mitral valve gradient

Question 12

a. No overshoot
b. No over damping
c. Good signal to noise ratio
d. Appropriate filtering
these are known as

Answer 12

optimal frequency response

Question 13

a. Inappropriate frequency response caused by damping coefficient
b. Tangled cables, loose connections
c. Fluid leaks
d. Electromagnetic interference
these are considered

Answer 13

electronic artifacts

Question 14

Pressure applied to a liquid at any point is transmitted equally in all
directions is known as

Answer 14

pascals law

Question 15

pascals and mmhg are units of

Answer 15

pressure

Question 16

the filters used in hemodynamic monitoring is ______ band pass filter

Answer 16

low

Question 17

which waveform would be the most likely for respiration excursion

Answer 17

PCW

Question 18

proper filtering gets rid of respiratory variation

Answer 18

false

Question 19

a _____hz filter gets rid of ac power interference

Answer 19

60

Question 20

strain gauge converts fluid pressure to an electrical signal using

Answer 20

variable resistors

Question 21

two pressure channels are required to record

Answer 21

simultaneous pressures

Question 22

what assures proper baseline and top of scale channels

Answer 22

calibration

Question 23

changing the ____adjusts band pass filter to reduce noise

Answer 23

HZ

Question 24

40 mm scale is for

Answer 24

Right heart pressures

Question 25

wheatstone bridge is located

Answer 25

transducer

Question 26

electrucak signal is converted into a waveform by process called

Answer 26

modulation-demodulation

Question 27

transducer that is zeroed while lying below level of pt mid chest will result in

Answer 27

mistakenly high pressures

Question 28

mid axillary is also mid chest is also

Answer 28

phlebostatic axis

Question 29

for radial arterial line on sitting up pt, where should zero port be positioned

Answer 29

at level of radial artery catheter

Question 30

temp drift of a pressure transducer should be corrected periodically by

Answer 30

opening to air and pressing zero button

Question 31

hr 60-100 what should frequency be

Answer 31

14 hz

Question 32

what is used for testing optimal damping

Answer 32

square wave test

Question 33

Ao pressure in hypotensive pt or pa pressure in pt with pulmonary htn what scale would you use

Answer 33

100mmHG

Question 34

tracing is wonky too much going on what to use for improve pressure waveform

Answer 34

apply band pass filter to eliminate high frequencies

Question 35

wheatstone bridge is a

Answer 35

direct current bridge

Question 36

range of wheatstone bridge in ohms

Answer 36

1ohm to several Mohms

Question 37

wheatstone bridge is used to calculate

Answer 37

mmhg pressure

Question 38

wheatstone bridge displays

Answer 38

waveforms

Question 39

wheatstone bridge is used for the measurement of physical parameters

Answer 39

as a strain gauge

Question 40

by using variations on a wheatstone bridge we can measure

Answer 40

resistance and impedance

Question 41

simplest applications of wheatstone bridge is

Answer 41

transducer

Question 42

thermal compensation can be provided in a wheatstone bridge

Answer 42

re-zeroing to atmosphere periodically

Question 43

pressure transducers come precalibrated at 0mmhg

Answer 43

false

Question 44

pressure transducers sensitivity come precalibrated from the factory at 100 mmhg

Answer 44

true

Question 45

radial artery systolic pressure is usually higher than Ao systolic pressure

Answer 45

true

Question 46

the square wave flush test evaluates the fluid filled transducer system for proper damping

Answer 46

true

Question 47

on the chest the junction of the manubrium and the sternum is known as

Answer 47

angle of Louis

Question 48

squeezing inverted IV pressure bag because

Answer 48

eject air

Question 49

when zeroing pressure transducer the air zero stopcock should be adjusted to the phlebostatic axis which is considered to be

Answer 49

Ra

Question 50

when pt left arm is raised the zero level

Answer 50

should remain at Chets level

Question 51

when pulling tail is squeezing the white continous flow device it

Answer 51

flushes the transducer

Question 52

arterial line pressure should be inflated to

Answer 52

300 mmhg

Question 53

what level the pressure transducer to the pt mid axillary line

Answer 53

bubble float level

Question 54

frequency is measured in

Answer 54

hz

Question 55

current is measured in

Answer 55

amps

Question 56

resistance is measured in

Answer 56

ohms

Question 57

electronic force is measured in

Answer 57

volts

Question 58

radiation exposure is measured in

Answer 58

sieverts

Question 59

another name for pressure recording amplifier

Answer 59

carrier amplifier

Question 60

when Cath in left coronary pressure drops the catheter should be

Answer 60

pulls back

Question 61

left coronary ostia is cannulated this drop in diastolic pressure is

Answer 61

ventricularization

Question 62

elimination of vibrations at a certain frequency is accomplished thorigh the use of

Answer 62

filters