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Which form of hemodynamic monitoring would be classified as noninvasive? Select all
that apply. One, some, or all responses may be correct.
Transthoracic echocardiogram
Thoracic bioimpedance
Pulse contour analysis - finger cuff
Esophageal doppler
Pulmonary artery catheter - Answer- Transthoracic echocardiogram
A transthoracic echocardiogram is a non-invasive hemodynamic monitoring technique.
Thoracic bioimpedance
Thoracic bioimpedance is a noninvasive way of measuring hemodynamic status.
Pulse contour analysis - finger cuff
Pulse contour analysis uses finger cuffs to measure hemodynamic status noninvasively.
Match the component of the hemodynamic monitoring system with the corresponding
function.
1. Connect the patient to the transducer
2. Receives the physiological signal and converts it to electrical energy
3. Maintains patency of the fluid-filled system and catheter
4. Contains the amplifier with recorder to increase the volume of the electrical signal
a. High-pressure tubing
b. Transducer
c. Flush system
d. Monitor - Answer- 1. a
2. b
3. c
4. d
In which order would the nurse perform the steps to zero the transducer to atmospheric
pressure?
Turn the three-way stopcock nearest the transducer until it is open to atmospheric
patient and closed to the patient.
Adjust the monitor until a "0" is displayed for atmospheric pressure.
Recalibrate the upper scale limit while the system remains open to air.
Return the stopcock to the closed position.
Place a cap over the open port.
, Observe the patient's waveform and hemodynamic pressures. - Answer- Turn the three-
way stopcock nearest the transducer until it is open to atmospheric patient and closed
to the patient.
Adjust the monitor until a "0" is displayed for atmospheric pressure.
Recalibrate the upper scale limit while the system remains open to air.
Return the stopcock to the closed position.
Place a cap over the open port.
Observe the patient's waveform and hemodynamic pressures.
It is important for the nurse to zero the transducer to atmospheric pressure to ensure
accurate hemodynamic readings. The nurse opens the transducer to air, adjusts the
monitor to zero, calibrates the upper scale limit, and then returns the stopcock to the
closed position.
The nurse is caring for a patient who is lying in the 90-degree right-lateral position. At
which point would the nurse level the transducer to?
4th intercostal space, midaxillary line
One-half the distance from the surface of the bed to the left sternal border
Left parasternal border
4th intercostal space, midsternum - Answer- 4th intercostal space, midsternum
A patient lying in the 90-degree right-lateral position would have the transducer
positioned at the 4th intercostal space, midsternum.
The nurse is preparing to perform the Allen test for a patient who requires an
intraarterial blood pressure monitoring catheter. In which order would the nurse perform
the steps of the Allen test?
Compress the radial and ulnar arteries simultaneously.
Ask the patient to clench and unclench the hand.
Observe for blanching.
Remove pressure from the ulnar artery.
Observe for immediate flushing of the hand. - Answer- Compress the radial and ulnar
arteries simultaneously.
Ask the patient to clench and unclench the hand.
Observe for blanching.
Remove pressure from the ulnar artery.
Observe for immediate flushing of the hand.
The Allen test assesses the presence of collateral circulation prior to radial artery
cannulation; the test assesses the supply of collateral circulation to the hand provided
by the ulnar artery through the palmar arch. When performing the test, the nurse would
first compress the radial and ulnar arteries simultaneously and then ask the patient to
clench and unclench the hand until it blanches. The nurse would then release one of the
arteries and observe for immediate flushing on that side of the hand.