You could make 72 separate uses of Import Records to move the data into your new related table, but that's still a lot of work...
A less labor intensive approach would be to write a script that loops through your records and fields to move the data one field at a time into new records created in your new related records table.
Show All Records
Go To Record [First]
Set Variable [$I ; 1 ]
Set Variable [ $ID ; Value: YourTable::YourPatientIDField ]
Exit Loop If [IsEmpty ( GetField ("YourTable::Time" & $I ) ) ]
#I'm assuming Time1, Time2 etc fields are time stamp fields, if not you'll need a more sophisticated expression here
Set Variable [$TimeStamp ; Value: GetFIeld ( "YourTable::Time" & $I )]
Set Variable [$FiO; Value: GetFIeld ( "YourTable::FiO" & $I )]
Set Variable [$pH; Value: GetFIeld ( "YourTable:: Ph" & $I )]
Go To Layout [//select layout for new related table]
Set Field [Newtable::ID ; $ID ]
Set Field [Newtable::TimeStamp ; $TimeStamp
Set Field [Newtable::FiO ; $FiO ]
Set Field [Newtable:: ph ; $pH ]
Set Variable [$I ; Value : $I + 1 ]
Exit Loop If [ $I > 72 ]
Go to Layout [Original Layout]
Go To Record [Next ; Exit after last ]
Note: this script assumes that if a Time field was left empty, all subsequent sets of dedicated fields are also empty and it skips to the next record. You'll have to modify your script if this is not the case.