Thoroughly palpate/test to make sure it is ruptured as opposed to slightly leaking, and compare with the other one to determine the percentage/degree of rupture. because that is totally important information.
Important, but for whom? I would think this is an exam best left for the surgeon, honestly.
How's an implant going to be ruptured? Car accident? So imagine for a minute that you have a woman immobilized on the stretcher, transporting to the hospital and you cut away her shirt and thoroughly palpate and test something you have absolutely no clue what you're dealing with?
The assessment comes from noting her report of a problem with the breast, a quick inspection to see if there's an inequality in the size, and in the history: what kind of implant, behind the muscle or not, the volume, etc.
I would hate to "thoroughly palpate" and cause the folded up, sharp-edged, ruptured implant to cause damage it hadn't yet, or finish dumping out potentially harmful substance through the rupture by squishing it the rest of the way.
All this, and I haven't even mentioned the patient's dignity. You don't know what you're looking for, can't do anything about it, and would be fulfilling your obligations by just noting and reporting the problem. No need to get all personal with the patient and "thoroughly palpate."