RFID Pressure Sensor System for Hospital Mattresses to Prevent Infections and Bedsores

1. RFID Pressure Sensor System for Hospital Mattresses to Prevent Infections and Bedsores Bikram Virk Sujoy Sanyal Ryan Eiswerth Wasif Khawaja Mushfiq Saleheen Dr. Koblasz, ECE4884 L05 April 22, 2008

2. OVERVIEW Develop an inexpensive hospital bed mattress that can reduce the risk of bedsores and spread of Nosocomial infections. Cost of prototype – $1,290 ($1,300 less than predicted) 1/21

3. Bedsores Life-Threatening • Definition: Unrelieved pressure to part of body for extended period of time, cutting off oxygen and blood flow • Statistics: - 60,000 deaths/years in America - 1 million patients/year in America - 2/3 of bedsores occur in people over 70 years old • Costs – over $1 billion/year • 2/21

4. Nosocomial Infections Life-Threatening - All Hospitalized Patients at Risk • Definition: Hospital-Acquired Infections caused by bacteria, viruses, etc.Includes Staph Infections • Statistics: - more than 2 million cases/year in America - 17,500 – 70,000 deaths/year in America • Causes: - Sloppy hygiene: 36% preventable (CDC report) - Aging hospitals: old mattresses • Costs - $4.5 - $5.7 billion/year • 3/21

5. Main Components of Project • 4/21

6. 5/21

7. Movement Monitoring System Trossen Robotics 24” Force Sensing Resistor Interface Kit 8/8/8 Voltage Divider • 6/21

8. WARNING: PLEASE MOVE TIMER: 30 Min • 7/21

9. WARNING: EGRESS DETECTED • 8/21

10. Monitor patient contact System: - Operating Frequency: 13.56MHz - Target Range: 24” with 1 Watt reader - Tags worn on wrist RFID • 9/21

11. RFID System • 10/21

12. Identification Process • 11/21

13. WARNING: DR. SMITH PLEASE STAND BACK • 12/21

14. Multiplexer Design Relays Antennas • 13/21

15. Competing Products Total Care SpO2RT Hospital Bed $28,500 Secure II Med/Surg Hospital Bed $10,000 • 14/21

16. 15/21

17. Selling Point • No need to buy new beds • Installed as add-on to existing beds • Money saved • 16/21

18. Current Status • 17/21

19. Obstacle: Proximity to Metal • 18/21

20. Alternative Solutions • Dynasys 13.56 MHz Antenna • 2 foot range • De-Q feature • $400 • 19/21

21. For Future Groups… • Buy Professionally made antennas • Bedside Falls • 20/21

22. For More Information Visit Us At www.ece.gatech.edu/academic/courses/ece4007/08spring/ece4007l05/ak11 • 21/21

23. RFID Pressure Sensor System for Hospital Mattresses to Prevent Infections and Bedsores Bikram Virk Sujoy Sanyal Ryan Eiswerth Wasif Khawaja Mushfiq Saleheen

26. Proximity to Metals • Difficult to find Matching Network

27. Nearby PC monitors • PROXIMITY WITH METALSAltered performance of the RFID system can be expected when metals are in close proximity of the radiation field. Proximity to metals effectively lowers the antenna's inductance. Lower inductance causes an increase in resonant frequency and also a reduction in "Q". Designers may consider starting with a higher-than-needed "Q" "in the lab" to start with, expecting it to be lowered when it is installed in its intended location. External capacitance may be required to tune the modified antenna system back to resonance. These types of situations can be experienced around conveyor belt structures and also embedding antenna loops on concrete driveways where metal re-bar absorbs some of the radiated energy. • http://rfidusa.com/superstore/product_info.php?products_id=121

29. Project Schedule • 14/21

30. Bring in computer to show pressure sensors

31. Obstacles Antenna Designs • 18/21

32. Our Design • 19/21

34. WARNING: EGRESS DETECTED

37. Table 1. Technical Design Specifications Desired and Actual Specifications

38. Trossen Robotics FSR • How it works

39. 5/21

40. In your final oral report, you should describe similar patented and commercially available devices • Explain details about your design and let us know why your design is better