Measurement of Respiratory Signals through oximeter

[Madhusudhanan]

heHi, This is Madhusudhanan Natarajan from Anjalai Ammal Mahalingam Engg College, Kovilvenni. I would like to ask some queries related to the DAQ products.Actually, We are going to upgrade the research work of oximeter in sleep monitoring system. For that, they have given some requirements. * To interface an oximeter (sensor) to the above said particular DAQ equipment. * Oximeter is used as a sensor and the incoming respiratory analog signals that should be converted to an analogous(digital) form by means of DAQ. Further process will be by using NI LabView. Is there any specific Data Acquisition System Interface for the above? Also, to monitor the respiratory signals. How to view the above?(Normal and Abnormal breathing) Please give me the specifications for the above.

Regards,

Madhu.

[Danny_Funk · Accepted solution]

Madhu,

What exact oximeter are you using?

Can you clarify is your oximeter outputting analog or digital signals. Some useful information is what frequencies does it output, at what voltages? What kind of resolutions are you looking for?

Danny Funk

Application Engineer

[johnsold]

Are you trying to extract the respiratory information from the modulation of the heart rate?  Or does your oximeter have a separate respiratory sensor?

Lynn

[Madhusudhanan]

Hi,

I'm trying to extract the respiratory information from the modulation of the heart rate with the help of oximeter. 

[Madhusudhanan]

Hi,

Oximeter is outputting analog signals.

[johnsold]

As you were advised in your other thread, nearly any DAQ device will probably be adequate for your purpose.

You will need a device with an analog to digital converter.  The resolution of the converter can probably be anything from 8 bits or more.  You will need hardware timed conversion of at least 100 samples per second; 1000 samples per second might be better.  The USB-6008/6009 devices can meet these requirements.

Extracting the respiratory rate modulation can be a challenge, depending on how much interference may exist on the signals. Search for Heart Rate Variability and similar terms to find what others have done.

There is also a Bio-medical board with participants who may have similar interests. 

Lynn