Wireless Data Link for a Hospital

1. Wireless Data Link for a Hospital Advisor: Prof Yngvesson Team: Shruti Sharma Wen Lo Ike Amazu

2. Introduction Have you ever visited a hospital, or been admitted into a hospital as a patient? If you have then you might have come across bedside monitors like this.

3. Scope Bed Side Monitor

4. 6 built-in module slots hold parameters and thermal recorder modules. To start measuring other parameters, just plug in a module.

5. Multi-connectors • Multi-connectorsWhen you plug a different transducer into a multi-connector, it automatically detects the type of parameter and starts measuring. No extra setup or different modules when changing the parameter. This feature provides cost savings as well as more efficient monitoring. Attaches to a monitor and transmits data to a telemetry system or central monitor.

6. Central Monitor

7. Our Project Purpose • Design a working prototype of a system that measures a patient’s heart rate and blood pressure. • Our System is supposed to appeal to smaller clinics (i.e. Umass Health services) that cannot afford the monitoring system employed in huge hospitals (Cooley Dickinson Hospital) • The goal of this project is to make this system work wirelessly and to make it more economical so the hospitals can afford to use it for every patient.

8. Transmission

9. System Block Diagram Set off alarm Heart rate monitor Transceiver 1 (Transmit) Transceiver 2 (Receive) Monitor computer A/D converter RS 232 RS 232 Blood pressure monitor Frequency hopper Store data GUI based user interface Input from the patient Wireless data transfer

10. Input…. • Inputs: Blood Pressure Pulse Rate • Analog Input • A/D Converter Heart rate monitor A/D converter Blood pressure monitor Input from the patient

11. Wireless Data Transfer • Connected to the Input using RS 232 • Frequency hopping: Frequencies act as “IDs” for the different patients. (902-928 MHz) Transceiver 1 (Transmit) Transceiver 2 (Receive) RS 232 RS 232 Frequency hopper

12. Wireless Transmission Maxstream 900MHz transceiver Baud Rate: 9600bps Receiver Sensitity: -110dB Voltage: 5 DC, Current: 150 mA

13. Wireless Transmission… • Tests: Range Tests Communication Link Quality Test Noise to Signal Ratio Test

14. Two Approach to the Problem • Microprocessor • Program using C++

15. Microprocessor • PIC16F877 • One bit cable connects processor/terminal (receive/transmit). • Keyboard and terminal

16. Block Diagram for PIC Approach

17. Transceiver to Processor • Clock rate for 16F877 is 4MHz • Transmit/receive rate may vary(9600 bps, 19200 bps, etc) • Need to scale system clock

18. C++ program Approach • Connect the transceiver to computer via serial port • Write a program in C++ to retrieve data from the serial port • C++ program also Decode digital pulse into mathematical #

19. Program Feature • The C++ program will be able to store the data in to array. • The program will do a constant refresh on the array to receive updated data. • The program has loop to check on every data for abnormal status and post alert

20. User Interface • Use can input command to call up any data in the array. • Alert will pop up on the screen once abnormal data is detected.

21. Deliverables • Wireless Transmission • Link between Blood Pressure Monitor and the Pulse Rate Monitor • Program for the Monitor Computer

22. Questions???