Multiple OBX to Single OBX

How do I take just one OBX segment from multiple OBXs in a message and send that one OBX only? I am basing it on the text value INFLATIONS that I see in OBX#5 in this example.

INBOUND

MSH|^~&|||||200804071554||ORU^R01|200804070023||2.2|

PID|||5770395||DJURICKOVIC^DRAGOSLAV||19510906|M||||||||||S25568551|

PV1|||||||Liao^Robert^MD|||||||||||||||||||||||||||||||||||||20080320|

OBR|1||HA000929|10000^CASE DATA|||20080320124819|20080320132617||||||||||||||||CTH|F||||||||||||||||||

OBX|1|ST|10301^PATN NAME||DJURICKOVIC, DRAGOSLAV|text||||||||20080320132617||||

OBX|2|ST|10302^PATN MRN||5770395|text||||||||20080320132617||||

OBX|3|ST|10314^PATN ROOM NO||ROOM 1|text||||||||20080320132617||||

OBX|4|ST|10310^PATN DOB||19510906|date||||||||20080320132617||||

OBX|5|ST|50100^PROC LOG ENTRY||INFLATIONS: Initial >> PTCA Balloon Inflated @ 8 Atm for 15 Secs  {L1}|text||||||||20080320130627||||

OBX|6|ST|50100^PROC LOG ENTRY||Procedure End|text||||||||20080320132617||||

OUTBOUND Should look like:

MSH|^~&|||||200804071554||ORU^R01|200804070023||2.2|

PID|||5770395||DJURICKOVIC^DRAGOSLAV||19510906|M||||||||||S25568551|

PV1|||||||Liao^Robert^MD|||||||||||||||||||||||||||||||||||||20080320|

OBR|1||HA000929|10000^CASE DATA|||20080320124819|20080320132617||||||||||||||||CTH|F||||||||||||||||||

OBX|1|ST|50100^PROC LOG ENTRY||INFLATIONS: Initial >> PTCA Balloon Inflated @ 8 Atm for 15 Secs  {L1}|text||||||||20080320130627||||

Any suggestions greatly appreciated!   🙂