Need of wearable biosensors Introduction What is a biosensor ? Properties of biosensor Wearable biosensors: -

1. Ring sensor2. Smart shirt Conclusion References

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.

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.

Consists of 3 parts:

Biological componentPhysiochemical component.Signal processor.

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

Continous monitoring. Easy to use. Reducing hospitalization fee.

Initial cost is high. Limited number of physiological parameters can

be monitored.

Fig. Smart Shirt System.

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