Table of Contents
What is the normal flow rate on an LVAD?
It typically ranges from 4 to 6 L/minute.
What does high PI on LVAD mean?
• The Pulsatility Index (PI) is a measurement of the flow pulse through the pump. (coming from the heart) • During LV filling, increase in pressure causes an increase in pump flow (higher PI. indicates better LV function)
What is an LVAD hum?
As the care of these patients expands into the general community, it is important for providers at all levels to be familiar with the sound of a normal LVAD. The sound generated is normally described as an “LVAD hum”.
What is the most complicating factor with LVAD placement?
Bleeding is the most common complication following LVAD implantation.
When should I increase LVAD speed?
Consider increasing the LVAD speed if invasive hemo- dynamic data suggest left heart failure (high wedge pressure, low cardiac output), and echocardiography demonstrates under-decompression the LV (increased LV cham- ber size, mitral regurgitation, frequent aortic valve opening).
What is a good pulsatility index?
The pulsatility index The range of normal values is between 3 and 5. The ease and quick visualization have made the PI a key parameter in assessing graft function. The PI may vary based on different filtering settings (10–20 Hz) as well as different coronary territories [12,16–18].
What does low PI on LVAD mean?
Lower values indicate lower filling pressures and lower contractility (the LVAD is providing greater support and unloading the left ventricle). The PI should be relatively stable under resting conditions.
Can you shock an LVAD patient?
If compressions are delivered, they should be done abdominally. Simple ED bedside echocardiography can be instrumental in the LVAD patient with shock. Because most assist devices only help the left ventricle, the right ventricle remains very vulnerable.
How is flow calculated LVAD?
The LVAD flow depends on interaction between the pump and the native heart and is determined by speed of the pump rotation, preload at the pump inlet, and afterload at the pump outlet.
What is RI and PI in Doppler?
RI = resistive index. PI = pulsatility index. presence of persistent diastolic notching.
Is it OK to perform chest compressions on a LVAD patient?
The use of chest compression on patients with LVAD remains controversial. It is generally contraindicated because of the risk of LVAD dislodgement or regurgitation (from the aorta to the left ventricle) may occur.
What is the HeartMate II LVAD?
With its wearable design and several carrying options, the HeartMate II LVAD supports your patients’ lifestyles. Other features and benefits: The HeartMate II LVAD comes with a lightweight, pocket-sized controller that interfaces with the implanted pump. Its features are designed for safety:
Where do I place the replacement HeartMate II controller?
ORANGE Trouble Shooting HeartMate II® lPlace the replacement Controller within easy reach, along with the batteries/battery clips. The spare Controller is usually found in the patient’s travel case.
Can I use the shower bag with the HeartMate system controller?
For complete information on using the Shower Bag with the HeartMate System Controller, patients and providers should see the Instructions for Use that came with the HeartMate II Left Ventricular Assist System.
What is included in the HeartMate II patient handbook?
It includes information on the operations, surgical procedures, patient care, clinical studies, technical specifications — and more — related to safe use of the system. This patient handbook explains how the HeartMate II Left Ventricular Assist System works.