This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

CCS/TIDM-BPM: Blood pressure filters and pressure sensors

Part Number: TIDM-BPM

Tool/software: Code Composer Studio


We are a university based in Geneva (Switzerland) and we are interested in the TIDM-BPM device. We have downloaded the Altium scheme and we noticed something. Usually to determine the blood pressure we need the AC part of the pressure sensor signal. In fact the output signal of the pressure sensor is composed of a DC part which corresponds simply to the pressure in the cuff and an AC part which corresponds to the pressure generated by the blood on the walls of the artery. Thus usually in order to get the DC part of the pressure sensor signal we make a low pass filter and to get the oscillations (AC part) we make a high pass or band pass filter. However in the scheme provided (please find the document attached) there is only a low pass filter. So our question is why there is not a high pass or band pass filter to extract the AC part of the pressure sensor signal (which is the part of the signal that will help us tp get the blood pressure value) and then how you extract it if indeed you don't use a high pass or band pass filter to get it. I hope that it's clear. 

The second question still concerns the same Altium scheme attached. We didn't really understand why you used two pressure sensors : BP300 and MP3V5050. 

Thank you very much.

Best regards,tidraj0.pdf

Mike Jaber, Geneva,Switzerland

  • Hello Mike,

    Thanks for your post.

    We will look into this for you and get back to you tomorrow.



  • Hello,

    Did you manage to get some informations ?

    Best regards,

    Mike Jaber, Geneva Switzerland

  • Hello Mike,

    I think there is a software band pass filter for this implementation.

    And as for why two pressure sensors, I think based on the schematic you can switch between using these two different pressure sensors.



  • Hello,

    Thank you for your response.

    Could you provide us the BP300 pressure sensor datasheet ? We need it in order to get some informations as current consumption for example. Indeed we didn't find the BP300 pressure sensor datsheet on the net. 

    We are also very interested in the AFE4403YZPR (heart rate mionitor) device. Do you provide any program for this device ? A program where we can find the device configuration, how to read the data, etc...

    We would like to thank you for your help, we may have additionnal questions in the coming days.

    Thank you,

    Mike Jaber,

    HEPIA, Geneva, Switzerland.

**Attention** This is a public forum