I'm not in the medical field, but I never wore a mask when my port was accessed (the nurses did). Sure, less exposure is better, but could you explain further?
I'm not in the medical field either, but based on my experience patients are either asked to wear a mask or turn their head away while the port is being accessed until it's removed or there is a dressing in place.
Step 7 : https://www.specialove.org/wp-content/uploads/joomla/58f-PRO...