applications of mems in healthcare industry

8/3/2019 Applications of Mems in Healthcare Industry

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by Rahul R. Raut Dessai,

Goa College of Engineering.


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The device comprises of three main units :

i. Housing unit

ii. Base unitiii. Sensing unit


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The base unit is pivotally connected to the housing unit.

The base unit includes electrical circuitry, a flexible ringand a receptacle.

The sensing unit includes a pressure transducer, flexible

diaphragm and interface layer.

Non-invasive technique.

Lifetime of 24 to 72 hrs.

Annual production 17 million units per year, with a unitprice less than $10.


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A conventional disc-type sensor can use only 10% of its total area for sensing.MEMS-based donut-type sensor can increase the sensing area to 50% of its total area.A conventional disc-type sensor can use only 10% of its total area for sensing.MEMS-based donut-type sensor can increase the sensing area to 50% of its total area.

A conventional disc type sensor uses only 10 % of its total area for sensing.

MEMS based donut type sensor can increase sensing area to 50 % of its totalarea.

Sensing unit


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HUMAN SKIN

PRESSURE TRANSDUCER

ELCETRICAL SIGNAL

DISPLAY

INTERFACE


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Device that integrates one or several laboratory functionson a single chip.

Scaling of single or multiple lab processes down to chip-format.

Small size - millimeters to a few square centimeters.

Small f luid volumes - less than Pico liters.

Consists of mechanical flow control devices like pumpsand valves or sensors like flow meters and viscometers.


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Basic fabrication processes is photolithography.

Initially most processes were in silicon, as these well-developed technologies were directly derivedfrom semiconductor fabrication.

Demands for specific optical characteristics, bio- orchemical compatibility, lower production costs and fasterprototyping increased.

New processes have been developed such as glass, ceramicsand metal etching, deposition andbonding, PDMS processing (e.g., soft lithography), thick-film- and stereo lithography.

Fast replication methods via electroplating, injectionmolding and embossing.


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Low fluid volumes consumption .

Faster analysis and less response time.

Better process control.

Compact systems.

Lower fabrication costs.


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Physical and chemical effects

capillary forces,surface roughness, chemical interactions ofconstruction materials on reaction processes becomemore dominant on small-scale.

Low signal to noise ratios - detection principles maynot always scale down in a positive way.


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Real time polymerase chain reaction(PCR) - amplify asingle or a few copies of a piece of DNA.

Biochemical assays - testing or measuring the activity ofa drug or biochemical in an organism or organic sample.

Blood sample preparation - can lyse (break down) cells toextract DNA.

Testing the safety and efficacy of new drugs.

Glucose meter.


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applications of mems in healthcare industry

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