Arterial Pressure Monitoring Flashcards
What are the common sites?
- Radial artery
- Brachial artery
- Femoral artery
Which arteries require a test prior to insertion to verify collateral circulation in the extremity?
Allen’s test
= assessment of the perfusion to involved limb must occur.
How to validate the accuracy of invasive hemodynamic monitoring values?
- ) Level = phlebostatic axis
- ) Zero reference
- ) Dynamic response testing
How to ZERO REFERENCE or eliminate the effect of atmospheric pressure on the fluid-filled monitoring system?
the transducer system must be “zeroed” at the level of the phlebostatic axis.
Accuracy
Where is the phlebostatic axis?
4th intercostal space,
midaxillary line
Approximate level of RIGHT ATRIUM
What is Zero reference ?
Negate atmospheric pressure
How to accomplish zero referencing?
supine or with the HOB elevated up to 45 degrees.
What does Dynamic response testing / Square wave test verify?
that the transducer system accurately reflects displayed pressures.
Tracing
normal arterial waveform components
upstroke represents?
systolic pressure
Tracing
normal arterial waveform components
Dicrotic represents?
aortic valve closure
Equipment
pressurized flush system with transducer
What is the pressure?
Pressure at 300 mm Hg
Why is the pressurized flush system pressure so high? (300)
For COUNTERACTING the pressure the artery and heartbeat itself
Managment
Dampened waveforms signify?
inaccurate readings
Managment
When Comparing values with noninvasive BP.
You can expect?
- ) A-line should be more accurate.
2. ) Difference of 5 mm Hg is expected.
Te 5 Arterial Line Managment interventions?
- ) Monitor waveform.
- ) Compare values with noninvasive BP.
- ) Maintain intra-arterial system.
4.) Check site and circulation to extremities – Allen’s test
prior to insertion.
5.) Set alarms.
