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  • Author Author: fustini
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Biosensor crunch time

fustini

Our biosensor array team worked late into the night on Saturday at Pumping Station: One.  With the hackerspace challenge build deadline on Tuesday night, it's definately crunch time!

 

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Thankfully we've got a nice array of working sensors (in the order of signal speed):

 

  • EKG
  • Pulse oximeter
  • GSR (Galvanic Skin Response)
  • CO2
  • Temperature

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Dan yet again played the role of test subject:

 

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The QRD1114QRD1114 sensor from SparkFun contains an IR LED and a compatible phototransistor.  It dectects pulse via the change in the amount of infrared light reflected by finger as blood pumps through it.

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We observed a great correlation between EKG and pulse oximetry signals:

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Cheers,

Drew

Parents

  • ron5329, you mention your BP drops and your heart rate is rocketing? Please look into Postural Orthostatic Tachycardia Syndrome, this may be what you are suffering from. I have been diagnosed with this and it is the reason I am interested in building this project. If you have a heart monitor you can test yourself, lie down for 10-20 minutes, completely flat, no moving or talking and relax. Work out your resting heart rate. Then immediately stand and stand as still as possible, no moving or talking or fidgeting. Monitor your heart rate for the next 30 minutes. If your heart rate increase more than 20 bpm (ie, goes from 60 lying down to 80+ standing) this is considered abnormal. If within 10 minutes of standing your heart rate increase more than 30 bpm, or at any point goes over 120bpm, then you meet the diagnostic criteria for POTS. I hope this is helpful, your heart should not be increasing that much without significant exercise. Please see a Doctor, preferably a cardiologist and mention POTS.

Comment

  • ron5329, you mention your BP drops and your heart rate is rocketing? Please look into Postural Orthostatic Tachycardia Syndrome, this may be what you are suffering from. I have been diagnosed with this and it is the reason I am interested in building this project. If you have a heart monitor you can test yourself, lie down for 10-20 minutes, completely flat, no moving or talking and relax. Work out your resting heart rate. Then immediately stand and stand as still as possible, no moving or talking or fidgeting. Monitor your heart rate for the next 30 minutes. If your heart rate increase more than 20 bpm (ie, goes from 60 lying down to 80+ standing) this is considered abnormal. If within 10 minutes of standing your heart rate increase more than 30 bpm, or at any point goes over 120bpm, then you meet the diagnostic criteria for POTS. I hope this is helpful, your heart should not be increasing that much without significant exercise. Please see a Doctor, preferably a cardiologist and mention POTS.

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