I need some direction

I have a huge Sql2k db and I need to get information from several tables. I created the stored proc's to get the info I need.
I have a datareader that runs the Sp with a Parameter
 I then need to call another sp_w/parameter while looping through the first reader.
ex:
dr=cmd.ExecuteReader
while dr.read()
      PatientID= dr.getstring(0)
      Patient(PatientID)
next

Private Sub Patient(byVal PatientID)
execute another reader
while dr.read()
     do some stuff
next
end sub
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What is the Best way to do this, two Datareaders just wont work in the same connection.