Is it possible to extract the respiration signals from ecg?

[Irshu]

Hi,

is it possible to extract the respiration signals from the ecg? i'm developing a smart lie detection system where i need to acuire the heartbeat rate, respiration and the skin conductance of the subject. these are the sensors i have ordered from vernier.

1. SensorDAQ (http://www.vernier.com/mbl/sensordaq.html)

2. Respiration monitor belt (http://www.vernier.com/probes/rmb.html)

3. Gas pressure sensor (http://www.vernier.com/probes/gps-bta.html)

4. Hand grip heart rate monitor (http://www.vernier.com/probes/hgh-bta.html)

but i recently found that it is possible to extract the respiration signals from ecg signals. is that true? if it is, i can ask them to remove respiration monitor belt and gas pressure sensor so that i can cut a of cost.please advise me on this,

thank you,

Irshad.

[ZJ.Gu]

Hi Irshad,

It is said in many papers that the main peak around 0.3Hz in Heart Rate Variability Power Spectrum represents respiration rate:

You could use HRV Analyzer in startup kit to extract the power spectrum.

Thanks!

ZJ Gu

[Irshu]

Hi ZhijunGu,

thank you so much, it helped me a lot...:)

Irshad.

[LuI]

We here at getemed.de provide live-signs monitors that monitor - amoung others - ECG, SpO2 and respiration. From our experience I would say that respiration does influence ECG signal, but it is very hard or under some conditions even impossible to reliably determine respiration from ECG. With known signals OK, but not if both signals are to be determined. What we do is measuring the respiration signal using transthoracial impedance via the ECG electrodes. For this purpose a very small AC current is transferred through the patient (as modern balances do), but this might be outside of what your hardware can do.

Your idea _might_ be good enough for what you are trying to accomplish, but it might also fail in the field. So be warned!

--

Greetings from Germany!

Uwe

[THMSaschaM]

Hi ZJ Gu,

the HRV Analyzer VI's in startup kit need the "rr", "original rr" or "detrended rr" at input.

How can I get that right Datatyp from my original ECG or my rectifyed ECG with ecg_prepro_rectification.vi?

Acutaly I record my ECG Signal with ELVIS II+.

Is there any more help files or tutorials to use the source code of biomedical startup kit?

regards,

Sascha

[ZJ.Gu]

Hi Sascha,

If you have the source code version, you could refer to the HRV Analyzer's source code to see how to obtain those signals using startup kit VIs.

Thanks!