Download 480_pre-proposal int..

Introduction:
Individuals with chronic illnesses such as high blood pressure are required by their physicians to
regularly measure and record their blood pressure to help keep track of their progress. Such
individuals may have limited mobility preventing them from personally taking their blood
pressure and keeping records. Therefore our sponsor, Intelligration Inc., requires Team 5 to
design and prototype a wireless blood pressure module to aid said individuals. This wireless
blood pressure module will use a Bluetooth module to transmit blood pressure readings from a
device to a personal computer, hence enabling an individual who needs this device to keep track
of their blood pressure easily. The main specification required by Intelligration Inc. is that we
use a wrist wireless blood pressure device as opposed to an upper-arm device.
Background:
Our sponsor has very specific criteria as to what we should use in this project; therefore
little research on the necessary parts was done. However, due to the nature of our project, a
reminder of what a blood pressure reading actually means was necessary to proceed. Blood
pressure is the measurement of the force applied against the walls of the arteries as the heart
pumps blood through the body. So the pressure is determined by the force and amount of blood
pumped and the size and flexibility of the arteries. The measurement reading consists of two
numbers as follows: 120/80 mmHg. This means the systolic pressure is 120 and the diastolic
pressure is 80. The systolic pressure is the measurement of the maximum pressure exerted as the
heart contracts while diastolic pressure is the measurement of the pressure in the arteries between
beats when the heart is at rest (Chang).
Research was also done as to which brand of blood pressure monitor to use considering
price and dependability for our required task. We chose to use the Omron HEM 650 Blood
Pressure Wrist Monitor as it most closely resembled our specific requirements. As for the
Bluetooth device, it was specified that we use the Toothpick 2.0 Bluetooth PIC Module. Another
concern as we talked with our sponsor was the actual components required for our blood
pressure device and the Bluetooth device. After talking with our sponsor, they suggested that we
can use the PIC that comes with the Bluetooth device or a separate one for the blood pressure
device. More research is needed on whether or not to use a separate PIC for the blood pressure
sensor; specifically how much capability the Toothpick Module PIC contains. Based on
previous projects done by ECE 480 students, the Microchip 18F4420 microcontroller provided in
the ECE 480 course curriculum can be utilized for this purpose. Also from this previous team,
one suggestion for improvement is to use a band-pass filter to attenuate any noise due to hand
movement. (Scheel)
Projected Budget:
Expenses
Omron HEM 650 Blood Pressure Monitor- Wrist Cuff(3)
Toothpick Bluetooth Module(4)
Misc. Blood Pressure Components
Total
Cost (US$)
66.59
145.92
50.00
$262.51
References:
Buy.com. “Omron HEM-650 Blood Pressure Monitor – 90 Reading(s).” 07 February 2009.
Buy.com Inc. <http://www.buy.com/prod/omron-hem-650-wrist-type-blood-pressuremonitor-with-advanced/q/loc/66357/205521021.html>
Chang, Louise. “Hypertension/High Blood Pressure Guide.” 07 February 2009. WebMD LLC.
01 October 2005. <www.webmd.com/hypertension-high-blood-pressure/>
Mouser Electronics. “TP20-DIL.” 07 February 2009. Mouser Electronics Inc.
<http://www.mouser.com/Search/ProductDetail.aspx?qs=sGAEpiMZZMsGelYiB%252bj
hZqyI%2fzRCMWJgnFPFwFyKIrk%3d>
Scheel, Kevin et. al. “Mondialogo Blood Pressure Circuitry.” February 2007.