Download Alternative Design #3 - Biomedical Engineering

Table of Contents
1. Introduction……………………………………………………………...…………...3-5
1.2. Subunits……………………………………………………………..………….…5-26
1.2.1 Thermometer…………………….………………………………….….…5-8
1.2.2 Pulse Oximeter……………….…………………………………….……8-14
1.2.3 Non Invasive Blood Pressure……………………….……………….....14-17
1.2.4 Respiratory Rate……………………………………………………..……..17
1.2.5 Weight………………………….…………………………………..………18
1.2.6 Microprocessor…………………………………………………….…...18-20
1.2.7 LCD Screens…………………………………………………………....20-21
1.2.8 Speech Output…………………………………………………….….…21-23
1.2.9 Alarm………………………………………………………………….…...23
1.2.10 Secure E-mail System…………………………………..……………...…24
1.2.11 Power Supply……………………………………………………….…….24
1.2.12 Bluetooth……………………………………………………………...25-26
1.2.13 Pushbuttons………………………………………………………….……26
1.2.14 Casing………………………………………………………………….....26
2. Realistic Constraints ………………………………………………………….…..26-28
3. Safety Issues………………………………………………………………………29-30
4. Impact of Engineering Solutions………………………………………………….30-32
5. Life-Long Learning……………………………………………………………..…32-33
6. References……………………………………………………………...…………33-34
Figures and Tables
1. Illustration of Vital Signs Monitor…………………………………………….………..4
2. Flowchart of Vital Signs Monitor Operation………………………………….………..5
3. Oral Temperature Probe………………………………………………………....……...6
4. Thermometer Linearizing Circuit……………………………………………………....6
5. Thermometer Circuit………………………………………………………………...….7
6. Pulse Oximeter Circuit Block Diagram……………………………………….………..9
7. Pulse Oximeter Finger Probe………………………………………………………..….9
8. Circuit for Constant Current LED Driver…………………………….…………….....10
9. Timing Circuit……………………………………………………………………...….10
10. Circuit to Pulse the LEDs……………………...………………………………….…11
11. Current to Voltage Photodiode Conversion Circuit…………….…………………....12
12. Sample-and-hold Circuit……………………...……………………………….……..12
13. Pulse Oximeter Circuit Diagram……………………………………………………..13
14. Pulsatile Signals Found in the Intensity of Detected Light…………………….…….14
1