Need of wearable biosensors Introduction What is a biosensor ? Properties of biosensor Wearable biosensors: -1. Ring sensor2. Smart shirt Conclusion References

Use of wearable monitoring devices allow continuous monitoring of physiological signals.

Wearable systems are totally non-obtrusive devices that allow physicians to overcome the limitations of ambulatory technology.

detects events predictive of possible worsening of the patients clinical situations.

A biosensor is a device for the detection of an analyte that combines a biological component with a physio-chemical detector component.

Father of the Biosensor Professor Leland C Clark Jnr 19182005

NEED OF WEARABLE BIOSENSORS Remote monitoring of patients Training support for athelete Monitoring of individuals who work with hazardous elements Tracking of professional truck drivers vital signs to alert them of fatigue

Consists of 3 parts:

Biological componentPhysiochemical component.Signal processor.

DEVELOPMENTS Ring Sensor Smart Shirt

Fig 1. photograph of ring sensor,size of the top board is 0.8 x 0.8 inch.Fig 2. ring sensor weared on a finger. works on the principle of plethysmogram and pulse oximetry.

LEDs and Photodiodes. First stage amplifier. Sample and Hold circuit. Signal Conditioner. CPU. RF Transmitter.

Software for the microprocessor on the ring. Software for the host computer. LEDS and photodiodes.Micro processor(inside) BatteryTransmitter

BLOCK DIAGRAM OF RING SENSOR

Easy to use. Reducing hospitalization fee. Continous monitoring.

Initial cost is high. Limited number of physiological parameters can be monitored.

SMART SHIRT(GTWM)Smart shirt developed at Georgia tech which represents the first attempt at relying an unobtrusive, mobile and easy to use vital signs monitoring system

Research on the design and development of a smart shirt fort a combat casualty care has led to the realization of the worlds first wearable motherboard

The principal advantage of smart shirt is that it provides for the first time a very systematic way of monitoring the vital signs of humans in an unobtrusive manner

Fig. Smart Shirt System.

APPLICATIONS OF SMART SHIRTMedical monitoringCombat casualty careSports/Performance monitoringSpace experimentsMission Critical/hazardous applicationWearable mobile information infrastructure

Easy to wear and take off. Continous monitoring. Initial cost is high. Battery life is less.

Smart shirt technology opens up existing opportunities to develop adaptive & responsive systems that can think & act based on the user conditions stimuli & environment.

Certain individuals are susceptible to anaphylaxis reaction (an allergic reaction) when stung by a bee or spider and need a shot of adrenaline immediately to prevent further fatalities. by applying advancements in MEMS(Micro-Electrochemical systems) technology we can achieve that. The Smarts shirts delta acquisition capabilities can be used to detect the condition when an individual is lapsing into a diabetic shock and this integrated feedback mechanism can provide the appropriate response to prevent a fatality

Just as special-purpose chips and processors can be plugged into a computer motherboard to obtain the the required information processing capability, the smart shirt is an information infrastructure in which the wearer can plug in the desired sensors and devices, thereby creating a system for monitoring vital signs in an efficient and cost effective manner with a universal interface of clothing.

Just as the spreadsheet pioneered the field of information processing that brought computing to the masses.It is anticipated that the smart shirt will bring personalized & affordable healthcare monitoring to the population at large.

Park and Jayaraman,Enhancing the quality of life through wearable technology,vol. 22, June-03 R.Neumann,Biomedical Sensors ,handbook of biomedical instrumentation,page. 725-755 http://www.sensatex.com/smartshirt.html http://en.wikipedia.org/wiki/Biosensor