Medical Applications User Guide (pdf) - Freescale Semiconductor

State-of-the-art technology—including
integrated MCUs such as Freescale’s Kinetis
8-bit 9SS08MM, and 32-bit MCF51MM—
allow the designer to achieve portability
for touch sensing and medical-grade
communication (following Continua Health
Alliance guidelines) with libraries that are
downloadable from freescale.com/medical.
These elements enable solutions focused on
preventive medicine, which ultimately reduce
patients’ acute complications and costs
related to their treatment. This can help health
institutions redirect money used for treatment
toward prevention and can help insurance
companies cut costs.
The hospital kiosk includes a touch-sensing
interface that allows the user to navigate the
machine’s interface. This flat surface makes
the machine easier to disinfect after each user.
It is more difficult to disinfect a machine with
mechanical buttons that can hold pathogens
such as bacteria and viruses in the edge of
the buttons.
The kiosk includes a magnetic card reader
used to identify the patient and to keep a
record of the patient’s abbreviated e-chart.
The e-chart contains the following data:
• ID fields: First name, last name, birth date,
gender, contact information
• Family medical history: Cancer,
cardiovascular disease, chronic
degenerative diseases such as arthritis,
kidney disease, asthma, neurological
disorders, etc.
• Personal medical history: Medicines,
surgeries, diseases, etc.
• Non-pathological personal history: Blood
type, alcohol and tobacco use, drug abuse,
allergies, etc.
Once the patient is identified through the
magnetic card, the machine can take the
following measurements:
• Capillary blood glucose levels
• Systolic, diastolic and mean arterial
pressure
• Weight, height and body mass index
• Temperature
• Heart rate
• EKG DI
• Oxygen saturation level (SaO2)
• Maximum expiratory and inspiratory
flow peak
• Inspiratory and expiratory lung volume
After this information is entered, a test result
paper is printed and a remote database is
updated with these readings. If the kiosk
detects a critical problem, it sends the report
to a mobile device that could report the
finding to a physician or health care provider.
A step-by-step video shows how to perform
these tests so that the user can perform
the tests without help from a health care
professional. With language support in
English, Spanish and Japanese, the user
sees and hears how to perform these tests.
As users become more familiar with the
device, they may pay less attention to the
instructions. This is why we also offer the
patient monitor interface.
Diagnostic and Therapy Devices
Figure 15-1: Hospital Admission Machine General Block Diagram
Hospital Admission Machine
Height
Ultrasonic
Sensor
Electronic Wireless
Patient’s Chart
Pulse Oximetry/
Heart Rate/
Glucometer
Digital Weight
Freescale Technology Optional
Blood Pressure
Monitoring
For an easy-to-use mode, the main core of
the kiosk can be separated. This creates a
USB-powered portable device for home use
or use at remote facilities when a physician is
not nearby.
The following sections describe the parts of
the system (some of them have already been
described in previous chapters):
• Weight scale
• Height ultrasonic sensor
• Thermometer
• Blood pressure monitor (systolic, diastolic,
mean arterial pressure)
• Heart rate monitor
• One-lead EKG (DI)
• Pulse oximeter
• Blood glucose meter
• Spirometer (air flow and lung volume)
freescale .com/medical 79
ITO Glass
Electrodes
USB
LEDs
RS-232
Xcvr
Secondary
MCU
Ethernet
PHY(100 Mbps)
USB
Power
Switch
Buzzer
4 x 5
Keypad
Matrix
BDM
Keypad
or
Touch
Screen
Figure 15-2: Analog Configuration for LEDs and Buzzer
Figure 14-2: Analog Configuration for LEDs and Buzzer
330Ω
A K
o.1 uF
120Ω
1kΩ
Display
MCU/MPU
32 MB
DDR
SDRAM
Backlight
Inverter
Level
Shift
Xcvr
Wireless
Comm
Power
Management
Non-
Volatile
Memory