Kidney scans are sometimes done particularly if in your experience with PE your kidney function was in doubt. It may be worth taking to your GP or ideally your consultant about what happened through your pregnancy & if there were an y 'markers' that need to be focussed on.
Scans can sometimes reveal real suprises...like you only have one kidney or if tere are interruptions to the blood flow to the kidney itself.
Hope this helps.
Every Woman is entitled to understand what happened in her pregnancy when pre eclampsia strikes. I hope to be able to support that process.