ADPD188GG PPG

I am preparing a smart wearable medical product for the elderly.I have some questions about ADPD188GG, and I look forward to your answers. I will to test the CNiBP, SpO2 and HRM / HRV of the elderly.so,

1.   CNiBP :   AD8223+ADPD188GG, connected to PD1 of ADPD188.           Is the ECG accurate on the watch?

2.   Can both CNiBP and HRM / HRV be measured by PD3 and PD4 of the same ADPD188GG?    If NOT?

3.   AS the following figure:

  Is the HRM measured by an LED reliable?

 ②  The products similar to watches, AD8223+ADPD188GG measurement of Cnibp reliable?

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Best wish to you