If the ePROMs are activated for your patient, the ePROMs have already been sent (and filled in) before the surgery and the system does not send ePROMs after the surgery, it is very likely that the surgery form has not been saved in the same clinical case. In order for the system to measure the post-surgery interval, the surgical form must be saved in the same clinical case and contain at least the date of surgery.
If this is the case and the ePROMs and the surgical form are in different clinical cases, move the surgical form to the case with the ePROMs.
Make sure that the operation sheet has not been submitted. You may see the "Move" option for the operation sheet in the overview of patient forms (see following image).