Medical Applications User Guide (pdf) - Freescale Semiconductor
Medical Applications User Guide (pdf) - Freescale Semiconductor
Medical Applications User Guide (pdf) - Freescale Semiconductor
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Diagnostic and Therapy Devices<br />
• Inspiratory reserve volume (IRV)—Maximum<br />
amount of additional air that can be inspired<br />
at the end of a normal inspiration (2500 ml)<br />
• Expiratory reserve volume (ERV)—The<br />
maximum volume of additional air that can<br />
be expired at the end of a normal expiration<br />
(1500 ml)<br />
• Residual volume (RV)—The volume of air<br />
remaining in the lungs after a maximum<br />
expiration (1500 ml)<br />
These measurements can be used in the<br />
following equations to express lung capacities:<br />
• Total lung capacity (TLC)<br />
TLC=RV+IRV+TV+ERV (6000 ml)<br />
• Vital capacity (VC)<br />
VC=IRV+TV+ERV=TLC-RV (4500 ml)<br />
• Functional residual capacity (FRC)<br />
FRC=RV+ERV (3000 ml)<br />
• Inspiratory capacity (IC)<br />
IC=TV+IRV (3000 ml)<br />
AN4325: Spirometer Demo<br />
with <strong>Freescale</strong> MCUs<br />
The contents of this application note show<br />
how it is possible to use the Kinetis K50, Flexis<br />
S08MM and Flexis MCF51MM MCUs along<br />
with the <strong>Freescale</strong> Tower System to implement<br />
a device capable to quantify human respiration<br />
capacities, by measuring volumes and flow<br />
rates. It uses the MED-SPI development<br />
board, which is an analog front end designed<br />
to enable the prototyping of spirometry<br />
devices.<br />
12.4<br />
Graphic LCD MPU<br />
<strong>Freescale</strong> offers the following devices that<br />
generate graphics. These devices can be used<br />
to illustrate lung volume.<br />
• Kinetis MCUs<br />
The Kinetis K70 MCU family includes<br />
512KB-1MB of Flash memory, a single<br />
precision floating point unit, and a Graphic<br />
LCD Controller that supports color QVGA<br />
displays as single chip or up to 24-bit SVGA<br />
Figure 11-3: 12-3: MED SPI SPI Block Block Diagram<br />
Mouthpiece<br />
<strong>Freescale</strong> Technology<br />
MPXV7025DP<br />
(Pressure Sensor)<br />
Figure 12-4: 11-4: Normal Spirometer<br />
66 <strong>Medical</strong> <strong>Applications</strong> <strong>User</strong> <strong>Guide</strong><br />
8<br />
7<br />
6<br />
5<br />
4<br />
3<br />
2<br />
1<br />
0<br />
Volume (L)<br />
displays using external memory. Supported<br />
by <strong>Freescale</strong>’s Portable Embedded GUI<br />
(PEG) Library with simple WindowBuilder<br />
interface for powerful GUI development.<br />
• Vybrid Controller Solutions<br />
Part of the Vybrid platform, the VF7xx<br />
family of devices are dual heterogeneous<br />
core SoCs meant for solutions that want<br />
to concurrently run Linux ® or Android on<br />
FFF<br />
MCU<br />
ADC MK53N512<br />
or<br />
MCF51MM256<br />
or<br />
MC9S08MM128<br />
USB Host PC<br />
with GUI<br />
FEV 1<br />
FVC<br />
0 1 2<br />
Time (sec)<br />
3 4<br />
the ARM ® Cortex-A class core and an<br />
RTOS like MQX on the ARM ® Cortex-M<br />
class core optimized power-performance<br />
core with very high integration. The VF7xx<br />
devices have been designed to replace at<br />
least the MPU and the MCU products on a<br />
system needing Rich HMI plus Real Time<br />
control at the same time.
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