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  • Author Author: arunmagesh
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Inductive sensing design challenge: Heamoglobin level sensing.

arunmagesh

Hello! Good day!

Before i start let me thank element14, texas instrument, cadsoft for selecting my idea and sponsoring my

project idea,

Let me break my crazy little idea i wish to do with Inductive sensor. Is measuring haemoglobin level in our

blood using this touchless Inductive sensor. As you all know our blood is made of iron. So i consider that

as conducting material. Now inorder to get something from it. I first give a magnetic flux/filed to a

specific part of our body say finger. Now due to mutual induction some field is developed in our blood

which will be soo tiny. Which is recorded by the sensor, based on continous sampling and leveling. And

haemoglobinlevel can be ccalculated by converting ginduction into density by some formula( i have to

refer some books). And we can get haemoglobin level.

Now i need experts and noobs to help me accomplish it.

Thank you.

M.Arun Magesh

  • in reply to fahrenheit_98

    Hi Giuseppe,

     

    You have my interest.

    Do you have a list of fluids that you tested and your detection data?

    I am very curious to see how you turn the LDC into a biosensor.

     

    DAB

  • Hi Arun,

    Your is a very interesting idea.

    In the past I developed SPR biosensors so I have some experience in this field.

    I have done some test with the LDC1000 and I have seen that it is very sensitive to contactless conductivity of liquid solutions (e.g. changing of salt concentration in the water).  So I proposed to investigate about the possibility to use the LDC1000 as a biosensor.

    In a biosensor it is very important the so called specificity: you need to distinguish the substance you are looking for (the analyte), from other substances.

    In your case you should distinguish between the change in conductivity arising from different concentration of haemoglobin, from the conductivity of all the tissues immersed in the magnetic field. The presence of iron is irrelevant from a magnetic point of view.

    Usually you need to create some specific enzymatic or immunological reaction with the analyte, measuring some phisical parameter (in this case the conductivity) and evaluating the values before and after the reaction.  For the metals are often used chelating agents.

    I hope this can help you.

    Giuseppe
     

  • in reply to vsluiter

    Ok. Even if it doesn't contain traces of ferro material.  image  i remember  my small grade theory that.  any current carrying conductor produce an field around it So if take blood in a glass tube i hope it will response to a magnetic field atleast in some nano scale level correct me if i am wrong

  • in reply to waelect

    Yes on some research i found fat content and bone will cause considerable change in blood thickness. So i have decided to make a standard quantity similar to gulcometer.  I am thinking of taking a small glass tube of standard mm's.  Will that help?