ACIST CVi - Procedure; Waveform Dampened

Troubleshooting Hemodynamic Issues
72 | English (USA) 2019-08 901418-003,01 ACIST | CVi® System User's Guide
8 Troubleshooting
Cannot Obtain Zero or Lose Zero Before Procedure
• Check the transducer backplate for the following issues:
ӽ e backplate is rated for 500 cases.
ӽ Make sure that the transducer is seated properly on the backplate.
ӽ Check the backplate connector. Clean residual contrast with warm water.
ӽ Replace the backplate if it is worn out, cracked, or damaged. When
inspecting the backplate, pay special attention to the condition of the
membrane and the rails that hold the transducer in place.
• Check the transducer for damage or dislodgement. If the transducer needs
to be replaced, disconnect from the patient, replace the manifold/transducer
kit, remove all air from the system, and resume the case.
• e hemodynamic monitoring system may be receiving excessive noise.
Make sure that the stopcock is stationary and located at midaxillary.
Waveform Dampened
• ere may be small bubbles in the system.
ӽ Make sure that the system is free of all air.
ӽ Close the stopcock to the patient. Flush the air from the system by
pressing the saline (S) button.
• High viscosity contrast in a small patient catheter will dampen the
waveform. Flush the patient catheter with saline from the stopcock's side
port.
• e transducer may be faulty. Replace the manifold kit.
• Replace the transducer backplate if it is worn out, cracked, or damaged.
When inspecting the backplate, pay special attention to the condition of the
membrane and the rails that hold the transducer in place.
• e manifold valve may be partially open. If it is, press the Standby button
on the side of the control panel to pause the CVi system and allow the
manifold valve to return to its home position.
• Check the patient catheter for the following issues:
ӽ A guidewire in the catheter will damp the waveform.
ӽ e catheter may be against a vessel wall. Reposition the catheter.
ӽ e catheter may be kinked. Replace the catheter if necessary.
ӽ Small catheters (4F) create a high impedance path in front of the
transducer. Flushing the patient catheter with saline may help.
ӽ High viscosity contrast in the catheter may damp the waveform. Flush
the patient catheter with saline.