7.16
Instructions for Use & Clinical Reference Manual (US)
LOW NATIVE HEART PULSATILITY (IMPELLA
®
5.0 AND LD)
When a patient has poor native ventricular function, the placement signal may remain pulsatile;
however, the amplitude will be dampened and both the minimum and maximum values will be
greater than zero because the aortic valve does not open and the Impella
®
5.0 or LD Catheter
raises the aortic blood pressure above the ventricular pressure during systole.
In a situation of low native heart pulsatility, the Automated Impella
®
Controller may not be able
to determine the catheter position. You may see the following indication on the home screen:
Impella Position Unknown
In this situation, the screen will appear as shown in Figure 7.11. Notice that the flow rate is
displayed in yellow in the lower left corner of the screen, indicating that the patient may not be
getting the benefit of the displayed flow rate.
Impella Flow
5.0
System Power
MUTE
ALARM
0 . 0
DISPLAY
0 . 0
MENU
PURGE
SYSTEM
Impella 5.0 S/N: 123456
30 - 06 - 2011 05:30
100%
CONTROL
FLOW
P - 8
L/min
5.2 Max
________________________
4.8 Min
Purge System
Purge Pressure: 600 mmHg
Purge Flow: 20.0 ml/hr
Impella Position
Unk nown
Impella position unk nown d ue to low pulsatility. Assess card iac f unction.
Impella Position
Unk nown
5.0
Figure 7.11 Impella
®
5.0 Catheter Position Unknown (similar for Impella
®
LD)
Actions to take:
1.
Assess cardiac function.
2.
If needed, confirm catheter position with echocardiography.
Summary of Contents for Impella 2.5
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