Medrad Veris 8600, Руководство по эксплуатации

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MEDRAD
Veris
8600
8 —9
Clinical Use and
Arterial Waveforms
A variety of physiological conditions alters the appearance of the IBP
pressure waveforms. Conditions such as hypertension, shock,
obstruction of the aorta, aortic valve disease, and pericarditis can
affect the arterial pressure waveform.
The arterial waveforms may also be affected by poor setup. The more
common problems affecting arterial waveforms are overdamping,
catheter whip and lack of periodic calibration.
Overdamping is caused by air bubbles, thrombus formation at the tip
of the catheter, or lodging of the catheter tip against the vessel wall.
Overdamping exhibits itself as a poorly defined waveform without a
noticeable dicrotic notch.
Catheter whip is caused by excessive movement of the catheter tip
within the vessel. Catheter whip exhibits itself as an erratic or noisy
waveform.
As described above, zero the IBP channels at least every eight hours
or according to hospital protocol.
Disparity between invasive and non-invasive blood pressure values
normally occurs due to the difference in the measurement technique.
Cuff pressure (NIBP) tends to be 5 to 10 mmHg lower than invasive
(IBP) measurements. This disparity can be even more pronounced in
hypothermic patients and with poorly arranged IBP tubing.
NOTE: Position transducers at the same height as the patient’s heart
for optimal measurement accuracy.