Cautions
8
| ACIST RXi System User’s Guide
901700-001,01 2019-09 English
Warnings, Cautions, and Symbol Definitions
• Always advance or withdraw a Navvus MicroCatheter slowly and
carefully.
• Verification of aortic and distal pressures is very important for the
upcoming pressure recordings. If the baselines are not equal at
this point, a systematic error will be created throughout the FFR
calculations.
• Always wear protective gloves and eye protection when cleaning or
decontaminating the system.
• Never allow oil or materials containing oil to come in contact with any
part of the system console.
• Never spray or pour any liquid directly onto the power supply, system
console, or control panel.
• Do not use any sharp objects or apply excessive pressure to any
component.
• Discard all cleaning materials in accordance with all local, state, and
federal regulations, codes, and directives.
• Inaccurate measurements from the hemodynamic pressure transducer
may result if the transducer is not prepared and connected correctly.
• With the stopcock at the midaxillary position, zero the hemodynamic
transducer at the start of each patient case by using atmospheric
pressure as a zero pressure reference. Zeroing the transducer ensures
that the pressure values measured are only from within a blood vessel
or from within the heart. Periodically re-zeroing the transducer
ensures the continued accuracy of blood pressure readings. If
hemodynamic signal drift is suspected, re-zero the transducer.
• Prior to recording physiological blood pressures with the
hemodynamic pressure transducer, re-zero the transducer at the
patient midaxillary position to establish a clear baseline. (Changes in
bed height, atmospheric pressure, catheter hub position, fluid density,
and so on, may affect the baseline pressure.)
• The blood pressure waveform may be dampened significantly when
using very small diameter catheters filled with contrast. Perform
a saline flush before recording physiological waveforms with the
transducer system.
• When using an ACIST or a third-party hemodynamic transducer, clear
all tubing of air to avoid producing an inaccurate reading.
• Whenever the hemo system is “zeroed”, ensure the stopcock is open
and actively zero RXi using the
Zero Pa
button.