gcrc informatics project

GCRC Informatics Project

Sponsor:

Dr. Paul Harris, GCRC Informatics Director

Members:

Chris Heath, BME/EE

Adam Nagel, CompE

Chris Nash, EE

Brendan Soar, CompE

February 10, 20054th Spring Presentation

Progress This Week

• Implemented basic functional algorithm

• Experimented with AirCable adaptor

• Resolved problems with 802.11b network

• Worked with MySQL libraries

• Updated website

Study Start

Start NIBP determination

Status response

Request NIBP status

Started OK

Check status bit

0–“busy”

Parse string for DP, SP, MAP

1-“done”

Request HR,Parse response

Store Data to file

Upload data to server

Upload successful?

(Timer) or (User Trigger)

Yes

No

Start

Poll for monitor model

Monitor model

Pro 1000

NIBPDError

Not Started OK

NoDB upload

error handler

Alternative Handlers

Other

Yes

Basic Functional Algorithm

Visible Screen

Pre-Acquire

Pre-Acquire Duties

• Call “dinamap model poll.vi” to determine model type, passes to next step

• Allow patient’s first name and last name to be chosen, passes these strings to next step

• Generates file name to be written to based off of patient name, passes into next step

• Waits until “Run” button has true value to enter into next stage

Dinamap Model Poll.vi

Intermediate Step

Intermediate Step Duties• Grab current clock value, pass into

acquisition algorithm• Create text file with given name, write the

patient’s name into it and close the file• Pass the file name into the acquisition

algorithm• Pass model number into acquistion• Acquisition algorithm is placed inside

infinite while loop

Acquisition Algorithm

1 2 3 4 5

Acquisition Algorithm 5-Step Process

1. Set “Ready to Acquire” Indicator to True

2. Enter wait loop. Loop waits for timer to run out, manual acquire requested, comment written, or abort signaled

3. Set “Ready to Acquire” Indicator to False

4. Open file, Acquire/write data or write appropriate comment

5. Close the data file

Wait Loop

Wait Loop• Waits for True value

from “Insert Comment”, “Take Measurement”, “Stop”, or clock compare to exit loop

• Displays seconds until next acquire while in loop

• “Less than” compare required so loop bypassed on first iteration

Write DataInsert Comment OR abort = False

Write DataInsert Comment OR abort = True

Write Data Block• If “insert comment” and “abort” = false

– Calls “Dinamap serial Acquire.vi”– Displays outputted measurements– Passes measurements into “dinamap write.vi”

• If “insert comment” = true– Writes comment string + date/time into file

• If “abort” = true– Writes “Study Concluded” + date/time into file

Dinamap Serial Acquire.vi

•Inputs the model number (not currently used)

•Outputs Systolic, Diastolic, Mean Arterial Pressures and Heart Rate to main vi

•Waits 20 seconds to allow Dinamap machine to begin measurement

Dinamap Write.vi

• Inputs all data found from “serial acquire”

• Writes these strings separated by spaces plus date/time to file

• Outputs the file refnum for closing in step 5

Sample Output

AIRcable Progress

• Power cable has arrived• Command Line Interface

successfully accessed via hyperterminal

• Connection to Pocket PC established

• Meaningful communication still not acheived

AIRcable Command Interface

• ASCII strings sent over serial changes settings

• Decided to place device in “Service-Slave” Mode, discoverable by PDAs

MySQL connectivity

• DALP (Database Access Libraries for PDAs)

• LabView supports linear use of external functions

• DALP implements a MySQL connectivity class

• Must write new standalone function, for use with LabView

• This new function must be compiled to DLL on the PocketPC

• Learning to develop in eMbedded Visual C++

LabVIEW’s Call Library Function Node

Excerpt from “Hello World” example in eMbedded Visual C++

For Next Week• Work on Bluetooth communication

plausibility

• Develop a “worst-case” solution in case BT does not work

• Work really hard on MySQL connectivity

– Working .exe demo within two weeks