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Inadequate damping will result in excessive resonance in the system and an overestimate of systolic pressure and an underestimate of diastolic pressure. Please try again soon. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. Micromachines | Free Full-Text | Aluminum Nitride - mdpi.com In the event that the patient's condition is causing a waveform undermed, it is To treat the basic condition to ensure an interpretation of the most adequate and accurate wave form. If a syringe is present on your facilitys tubing (As shown above), close it until you feel/hear a click while priming. If the transducer has not been levelled to the phlebostatic axis, pressure readings will be either falsely high or falsely low. Overdamping (defined as when the oscillations following the downstroke are sluggish and can underestimate systolic pressure or overestimate diastolic pressure). Overdamping will result in an under-reading of systolic blood pressure and an over-reading of diastolic blood pressure. However, the risk for hematoma and occlusion can be higher in the radial artery. A cross-sectional, observational study of arterial line measurements in a large general ICU. 1. Avolio AP et al. 3 Kinks. The most common reason for an under-damped spiked arterial trace is soft tubing inserted to extend the arterial line. A system with a high damping coefficient absorbs mechanical energy well (i.e., compliant tubing), causing a diminution in the transmitted waveform. Anything which takes energy out of the system results in a progressive diminution of amplitude of oscillations. [. This is different from zeroing and is dependent on position. oscillations in pressure -> displacement of diaphragm -> stretch/relax strain gauges . A number of causes of an over-damped waveform. Bubbles cause overdamping, which doesn't affect MAP, so this is correct. Risks associated with arterial LINES; time for a National safety standard? The waveform of the arterial line too damped The trace too damped will lose its dichrotic notch and . Before (under-dampened and a rather vibrant waveform) will result in underestimation . The microscope was not interfering with the arterial line. What is an under damped arterial line? You have just turned the stopcock at the air-fluid interface to zero the system when you notice blood backing up into the tubing.