Biomedical Engineering Reference
In-Depth Information
FIGURE 8-58
Control architecture
for an axial pump
based LVAD
[Adapted from
(Antaki, Boston
et al., 2003).]
FIGURE 8-59
DeBakey pediatric
LVAD with a
noncontact flow
sensor. (Courtesy of
micromedcv.com,
reproduced with
permission.)
The latest DeBakey LVAD includes a noncontact flow measurement device based
on magnetohydrodynamic principles, as shown in Figure 8-59. Measuring rather than
inferring flow simplifies the control process significantly.
8.6.4 Transcutaneous Energy Transfer
A transcutaneous energy transfer (TET) system to power an artificial heart consists of
components both external and within the body of the patient, as shown in Figure 8-60.
The external components include the following:
•
DC power source: This is a battery pack with sufficient capability to provide 10 W
to power a VAD and 20 W to power a TAH for between 6 and 8 hours. It uses
