Wireless Patient Monitoring System

Digital Health SectionProfessor: Patricia Mellodge

May 4, 2012

The use of electronics; in or on the body to assist medical professionals when treating various illnesses and ailments

Projects can focus in three main areas Prevention Diagnosis Curing

What is Digital Health?

Prevent further injuriesWireless reduces risks

Collect information from patient LocationTemperature

Wireless Monitoring System

First Ideas:Wireless Patient Monitoring System

Pollution Filter MaskOxygen Tank Flow RegulatorOrthopedic ShoesArthritic Glove

Project Selection Process

Voting: Ranked Projects 1-5 Top three projects discussed Weighed pros and cons Overall compatibility as a class/group project

Project Selection Process

Top three choices were: Wireless Patient Monitoring System, Pollution Filter Mask, and The Oxygen Tank Flow Regulator

Choose Wireless system because: Filled all digital health requirements Whole class could contribute Relevant use in real world Very broad consumer base Integrates and improves already existing

concepts

Results

To construct a wireless system containing:a hospital bed computer monitor a patient sensor rig

which would alert an outside party of a patient’s position and medical status.

Objective

Project ScheduleWeek Task

Weeks 1-4 (Jan. 27-Feb.18) Brainstorm and create a project plan

Week 5 (Feb.19-25) Create a parts list

Week 6 (Feb. 26-March 3): Order parts and create mid-semester presentation

Week 7 (March 4-10) Mid-semester presentation

Week 8 (March 11-17) Create schematics and begin assembly

Week 9 (March 18-24) Spring Break (each group needs to start writing for final

report)

Week 10 (March 25-31) Continue assembly

Week 11 (April 1-7) Finish assembly, begin testing, and continue to work on

final report

Week 12 (April 8-14) Start troubleshooting and continue to compile final

report

Week 13 (April 15-21)Finalize prototypes, compile presentation, and edit

report

Week 14 (April 22-28) Prepare final presentation and edit final report

Week 15 (April 29-May 5) Final Project Presentation due May 4 at 8:30AM

Week 16 (May 6-12) Final Report due on May 11 at 8:30AM

Patient Group Nathan

Coutermarsh Dillon Quadrato Dana Subki Loay

Alabdulmohsin Jason Jolles Kevin Veilleux Alyssa Broatch Melvin Peralta Stacey Dufrane

Groups

Nurse’s Station Alex LaMarche Shanique Jiles Tim Zimmerman Luis Luna

Bed Group Feng Chen Gino Cardone Benjamin Basso Jeremy Harvey Rajin

Roophnath Stephen Sett Matthew Smith

Wireless Patient Monitoring System

Bed Monitoring: Objective

Bed sensors determine if patient is in bed

Switches in a grid pattern are used to determine the patients location

Can be used in various settings

6’ x 2’ egg crate foam mattress pad

2 sheets of 6’ x 2’ plywood12 contact switchesMicrocontrollerMiscellaneous assembly hardwarePower source (lithium battery)

Bed: Materials

Contact SwitchesThe switches are constantly

open unless depressed by a patient on the bed.

This will send a high(1) signal to the microcontroller

Bed: Materials

Switch

Trigger

Bed Monitoring: Design

One sheet of plywood serves as a base, while the switches are mounted on top of it.

The second sheet of plywood has holes drilled in it. When the switches are depressed, they are flush with

the top sheet of plywood. Egg crate foam pad rests on top of the plywood to

create a comfortable sleeping environment.

First Design

New Design

Prevention of accidents through awareness of

patient status, accurate monitoring of position,

temperature, and orientation

Patient: Objective

Use a microcontroller to wirelessly transmit information from:Temperature sensorAccelerometer and tilt sensorsIndicate body orientation and location

Plan

Accelerometer and tilt sensors- Specifications: for each and picture

Temperature sensor

Patient

Original image obtained from:http://www.mrprotocols.com/oldsite/MRI/information.htm

Tilt SensorsArmband • Patient Rig• Supports mobility• Unobtrusive

location• Lightweight

design

Accelerometer

Patient: Armband

Image obtained form:http://mp3.about.com/od/iPod-MP3-Player-Accessories/tp/Top-5-Ipod-Armbands-Listen-To-Digital-Music-On-Your-Ipod-While-You-Exercise.htm

Easy to maneuver and lightweight iPod Armband houses the

enclosure of partsAltered iPod Armband will

house enclosure

To make a presentable way to show the nurse the information on each patient that needs to be monitored

We take data from the sensors taken from the other groups and present them in an organized manner

Nurse’s Station: Objective

Through LabVIEW, we will: Receive data from transceiver Parse the sensor data from the

data packet Utilize algorithms to filter

accelerometer data Display the patient's information

to the user

Nurse’s Station: The Plan

LabVIEW is used to display the information obtained from the patient and bed sensors

Transceiver will request and receive packets of data from all the sensors on the network

USB dongle is used to integrate the transceiver with the computer

Nurse’s Station: Parts

Nurse’s Station: LabView Demo

Outline

Proof of concept(Bed to Nurse’s Station)

LabVIEW Code

The Final Nurse’s Station

Goal was to shop efficiently Buy only essential parts Buy the cheapest compatible

parts Research each part individually

Write a proposal Have it approved

Budget < $350

Patient GroupPart Name Part Number Price Quantity Vendor Part Use

4 Way Tilt Sensor SEN-10313 $2.95 each 3Sparkfun Electronics

Patient Orientation

Triple Axis Accelerometer Breakout - MMA7361

SEN-09652 $11.95 1Sparkfun Electronics

Patient Motion

Xbee 1mW Chip Antenna-Series 1(802.15.4)

WRL-08664 $22.95 each 3Sparkfun Electronics

Communication

ARduino Nano version3.0

RB-Gra-01 $32.99 each 2 RobotShopAnalyze/Transmit Information

Gens ace batteries 98P-20C-850-2S1P-2222-Asoft

$5.80 3 Hobbypartz Power Supply

Voltage Regulator-3.3V COM-00526 $1.95 each 3Sparkfun Electronics

Regulate Voltage

Temperature Sensor LM34DZ $2.51 each 2 Digi KeyPatient Temperature

RPI-1031 Tilt-a-Whirl Breakout

SEN-10621 $6.99 each 3Sparkfun Electronics

Patient Orientation

Part Name Part Number Price Quantity Vendor Part Use

Xbee 1mW Chip Antenna-Series 1(802.15.4)

WRL-08664 $22.95 each 3Sparkfun Electronics

Communication

SPDT Switch Without Roller

275-016 $3.19 each 12 Radio ShackPatient Location

ARduino Nano version3.0

RB-Gra-01 $32.99 each 2 RobotShopAnalyze/Transmit Information

Egg Crate Convoluted 3 Inch Foam Mattress Pad/Topper Twin Size

ASIN: B000MZYDF6

$33.48 1 AmazonPatient Comfort

Gens ace batteries 98P-20C-850-2S1P-2222-Asoft

$5.80 3 Hobbypartz Power Supply

Voltage Regulator-3.3V

COM-00526 $1.95 each 3Sparkfun Electronics

Regulate Voltage

Sheet of Plywood 4' x 8'

166030 $24.77 1 Home DepotBed Foundation

Bed Group

Part NamePart Number

Price Quantity Vendor Part Use

Xbee Explorer Dongle

WRL-09819 $24.95 1Sparkfun Electronics

Communication

Xbee 1mW Chip Antenna-Series 1(802.15.4)

WRL-08664 $22.95 each 3Sparkfun Electronics

Communication

Nurse’s Station

Patient Group- $77.49Bed Group- $160.22Nurse’s Station- $47.89Grand Total- $326.35

Total Cost

Add Movie

Test Results

Split into Comparison Table: Temperature was: Position was :

Results

A wireless system has several advantages such as: Patient safety Low maintenance Ease of mobility for the caretaker/patient Capacity for transmitting information

No need for a bulky monitoring station

Advantages

Satisfies a demand for monitoring: Unattended falls, heart attacks,

fevers, and several other medical mishaps

Societal demand for this system due to staffing constraints

Applicable in a home setting Easy interface with future link to app

on portable phone

Advantages

Addition of different sensorsHeart rateEKG

Farther transmission rangeAbility to monitor more patients

Possible Improvements

Brendon DeManche Robert Hilton

Special Thanks To

Questions?