Should I use an optocoupler with A8232?

Hi,

I'm designing a medical application where the AD8232 is being used to acquire patient's ECG signals.Sometimes this acquisition could run in parallel with device charging. I'm wondering if I must use any kind of optocoupler to ensure the patient's safety? Or AD8232 has anything to protect it? I don't find any mention to that in its datasheet.

If I need to use it, does anyone have some circuit examples where an optocoupler it's used alongside with AD8232?

Best Regards,