What causes Underdamping?

Underdamping (defined as when the oscillations are too pronounced and can lead to a false high systolic or a false low diastolic pressure). Causes include: Catheter whip or artefact. Stiff non-compliant tubing.

What is a normal arterial line pressure?

In general, most people need a MAP of at least 60 mmHg (millimeters of mercury) or greater to ensure enough blood flow to vital organs, such as the heart, brain, and kidneys. Doctors usually consider anything between 70 and 100 mmHg to be normal.

What is the purpose of an arterial line?

An arterial catheter is a thin, hollow tube that is placed into an artery (blood vessel) in the wrist, groin, or other location to measure blood pressure more accurately than is possible with a blood pressure cuff. This is often called an “art line” in the intensive care unit (ICU).

Why does pressure increase in the aorta?

Because the aorta is compliant, as blood is ejected into the aorta, the walls of the aorta expand to accommodate the increase in blood volume. As the aorta expands, the increase in pressure is determined by the compliance of the aorta at that particular range of volumes.

Why are pressure bags used in arterial lines?

prevent blood from clotting in an arterial catheter, a slow continuous infusion of fluid is run into the catheter (at 2-3 ml per hour). To prevent the blood from backing up, the infusion is kept under pressure. You may notice green or blue pressure boxes or bags hanging near the bedside.

How do you manage arterial lines?

When removing the arterial line, hold pressure on the site for approximately 10 minutes and apply a pressure dressing to the site. Always ensure that the patient does not have any numbness or tingling in the area. Do not apply blood pressure cuffs to that arm, and Do NOT infuse any IV fluids via the Arterial line.

How long can an arterial line stay in place?

Arterial lines are generally kept in place for a short period, until you feel better and your condition stabilizes. You will stay in a critical care area where you are closely monitored, usually an intensive care unit (ICU). Your provider may insert a new arterial line if you need it for more than five days.

What kind of waveform is an arterial wave?

Among its many merits, the book features actual recorded arterial waveforms instead of artwork. The waveform depicted here represents the arterial pressure wave of a hypertensive person with poorly compliant arteries, borrowed from Mills et al (2008), who in turn adapted it from Smith et al (2000) .

What kind of waveform is an aortic pulse?

Arterial waveform in hypertension and peripheral vascular disease. The waveform depicted here represents the arterial pressure wave of a hypertensive person with poorly compliant arteries, borrowed from Mills et al (2008), who in turn adapted it from Smith et al (2000) . It is supposed to be an aortic pulse waveform produced by applanation

What are nonimaging tests for lower extremity arteries?

As discussed in Chapter 12 , the nonimaging or indirect physiologic tests for lower extremity arterial disease, such as measurement of ankle-brachial index, segmental limb pressures and pulse volume recordings, provide valuable physiologic information, but they give relatively little anatomic detail.

Which is the normal waveform in spectral Doppler?

When interrogating flow with spectral Doppler, the three basic arterial waveforms are 1,2: Triphasic flow is considered normal and monophasic flow is considered abnormal. Most authors consider biphasic flow abnormal, although some authors classify it as a normal waveform 2.