what variable can be used for multiple analyses on each paramcd

I have the following question,  each subject had multiple paramcd/param assessments at multiple visits,  actual visit window were assigned, when there were multiple visits in a visit window, we would have 2 different analyses, last date, or worst case.  I already had paramcd/param, avisitn/avisit, aval/avalc, basetype, dtype in the dataset, how to hold 2 different results, add new row ? add new column ?  what name can I use ? not parcat1 or avalcat1 or paramtyp. 

thanks