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Instant Patient Identification System

Instant Patient Identification System. Group 12 Jerry Lau, Allan Siu, Ching-kit Wu ECE 445 Senior Design April 26, 2007. Agenda. Introduction Objective & Performance Requirements Original Design Project Build & Tests Successes & Challenges Recommendations. Agenda. Introduction

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Instant Patient Identification System

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  1. Instant Patient Identification System Group 12 Jerry Lau, Allan Siu, Ching-kit Wu ECE 445 Senior Design April 26, 2007

  2. Agenda • Introduction • Objective & Performance Requirements • Original Design • Project Build & Tests • Successes & Challenges • Recommendations

  3. Agenda • Introduction • Objective & Performance Requirements • Original Design • Project Build & Tests • Successes & Challenges • Recommendations

  4. Introduction: IPIS • Utilizes the benefits of RFID and wireless communication technology to save more lives • IPIS can identify the patient and send his ID to the hospital that the ambulance is heading to wirelessly and automatically

  5. Introduction: IPIS • Benefits • Patient’s identity can be obtained without moving the patient • Patient’s identity can be sent to the hospital wirelessly • Hospital will have more time to prepare the right medical treatment for the incoming patient • Low cost

  6. Introduction: IPIS Features: • Portable RFID Reader • Automated Email Sending & Receiving Program • GUI-controlled Database • Can be widely installed on ambulances and hospitals

  7. Agenda • Introduction • Objective & Performance Requirements • Original Design • Project Build & Tests • Successes & Challenges • Recommendations

  8. Objective & Performance Requirements • Tags are recognized within 20cm • 100% accuracy in reading, sending, receiving and searching using the detected identification number • All process automated • The whole process should take less than 30s

  9. Agenda • Introduction • Objective & Performance Requirements • Original Design • Project Build & Tests • Successes & Challenges • Recommendations

  10. Original Design

  11. Original Design • State Diagram

  12. Original Design

  13. Agenda • Introduction • Objective & Performance Requirements • Original Design • Project Build & Tests • Successes & Challenges • Recommendations

  14. RFID Module Hardware components Printed circuit board Connection with computer

  15. RFID Module • RFID reader • TI Microreader RI-STU-MRD1 • Low frequency (134.2kHz) • Advantages: • Short detecting range • Good for simple data • Low powerconsumption

  16. RFID Module • RFID transponders • Read-only • Dimension/design • Receive 134.2kHz of the signal from the Microreader and send back a signal

  17. RFID Module • Reader Schematic

  18. RFID Module • PCB design

  19. RFID Module • Power Supply • 5Vdc is needed for: • Microreader (output stage and logic) • MAX232A for serial connection with computer • 9V battery is used and converted to 5V • using LM7805 voltage regulator • Can withstandup to 25V

  20. RFID Module • Initial power supply simulation

  21. RFID Module • Antenna • Requirements • Quality factor (Q factor) less than 20 • Q = 2πfL/R • Where: f = 134200 Hz (Frequency = 134.2 kHz) • L = Inductance (H) (Between 46μH to 48μH) • R = Series resistance (W) • Acceptable maximum range < 30cm • Prevent accidental scanning

  22. RFID Module • Antenna construction Antenna and RFID Transponder

  23. Reader Program • Continuously search for transponders in range • Display detected transponder ID’s in the list box • Output the latest detected transponder ID to a text file Reader Software Screenshot

  24. Testing Parameters • Power • Data analysis • Antenna • Obstruction and barriers

  25. Power • At 9V input, output of LM7805 is within 0.28% of 5V

  26. Power • Circuit works when battery voltage > 6.39V • At 9V input voltage, • I = 118mA when no transponder is detected • I = 90mA when transponder is detected • At 6.39V input voltage, • I = 96.4mA when no transponder is detected • I = 73.2mA when transponder is detected • On average, the circuit can operate continuously for 7 hours • A toggle switch is added to extend battery life

  27. Data Analysis • Data is sent to the computer through the serial port (RS232) Data format

  28. Data Analysis • Scanning accuracy is 100% Data format Waveform sample

  29. Antenna • Voltage across antenna

  30. Antenna

  31. Obstruction and Barriers • Transponders are assumed to be carry by patients in their wallet or purse • Testing is performed when transponders are put under clothes, in a wallet, and in a backpack • The average detectingrange is ~12cm, which is acceptable

  32. Communicating via E-mail • This part can be divided to two main parts: Sending E-mail, Receiving E-mail • C++ is used for this e-mail program

  33. E-mail Account • POP3 e-mail account • Bluebottle.com • Access to the server • Auto Log in to the account

  34. Sending E-mail • Read data from RFID device • Check continuously for any new data • Compose an e-mail with patient’s ID

  35. Sending E-mail • Tested Results • Best with port 25, 26, 465 • Maximum time to send an e-mail: 3s • Data accurate • If internet is temporarily not available, the program would keep trying to send e-mail.

  36. Receiving E-mail • Auto log in to the account • Check continuously for any new e-mail • Obtain the content from the server • Show the sender e-mail, time, and content

  37. Receiving E-mail • Tested Results • Maximum time to receive an e-mail: 3s • Data Accurate • No need to download any attachment • Auto compose a single text file with all the patient’s ID in the receiving time order

  38. E-mail • Easy to use .EXE file • Fully automatic, no manual control is needed • Fast obtaining time, maximum~5s in total

  39. E-mail • Block e-mail from unauthorized senders • Auto delete spam mail

  40. Hospital Database Flow of Data Incoming Email Access Database Text File GUI (Form)

  41. Hospital Database • Microsoft Access • Relational Database Management System with Graphical User Interface • Can use data stored in MS SQL Server, Oracle or any ODBC compliant data container • Compatible with SQL • VBA to create different Forms to control the data

  42. Hospital Database Top Level Menu GUI Application Patient Receiving Main Patient Record Detail Patient Record Database

  43. Hospital Database Main Menu

  44. Hospital Database Main Patient Record

  45. Hospital Database Detail Patient Record

  46. Hospital Database Patients Receiving

  47. Hospital Database Detail Patient Record

  48. Agenda • Introduction • Objective & Performance Requirements • Original Design • Project Build & Tests • Successes & Challenges • Recommendations

  49. Successes • Met the circuit specifications (Power, range, accuracy) • The antenna has an acceptable range of detection • Able to send and receive email accurately within 5 s • Able to connect with the Email Receiving Part and matches the corresponding patient record

  50. Challenges • Database • File type handling

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