The primary intended outcome of this assignment is a deeper understanding of the syntax of HL7 V2 messages and XML document. This assignment should also impart a greater appreciation for the complexities and challenges of representing clinical data for exchange with another clinical information system. Your assignment involves a hands-on attempt to represent data using the HL7 and XML syntaxes with the following data. You will generate an ORU message consisting of a message header (MSH), patient ID (PID), observation request (OBR) and observation result (OBX) segments for this message. Remember, HL7 has specific lengths and fields for each type of message.

An HIV result generated on August 10, 2002 at 1:47 PM is sent from LabCorps (CLIA number 34D0655059) sending facility using their Labcorp-HIV application. This is sent to the Indiana State Department of Healths (INDOH) receiving application called PHIS. Construct the appropriate HL7 v2.3 MSH segment to send the HIV result to INDOH.

Further, the HIV result is for a patient by the name of John Doe, born on August 17, 1961, whose LabCorp assigned accession number is 01920437090. His home address is 556 N Elder Ave, Indianapolis, IN, 46202. His phone number is 555-7482. The patients mothers name is Mary Poppins. Construct the appropriate HL7 v2.3 PID and NK1 segments.

For the HIV result, the specimen has an accession number (a filler id) of 01920437090. Labcorps name for the test is Helper T-Lymph-CD4, and has a local Labcorp test identifier of 038158. The blood was drawn on August 7, 2002 at 7 am, and received at the lab at 4:46 pm on August 8th, 2002. The ordering physicians phone number is (317) 555-6723. The results are final. Construct the appropriate HL7 v2.3 OBR segment.

This particular HIV test has a LOINC identifier of 8127-3, a test name of Lymphocytes.CD4, and the two letter abbreviation for the LOINC system is LN. The lymphocyte count was 182, the units were per cubic mm (/MM-3), the reference range is 359-1519, which is low (L). This measurement was performed on August 8, 2002 at another Labcorp (Labcorp Raritan) site, with CLIA ID 31D0125232. Construct the appropriate HL7 v2.3 OBX segment.

Now construct an XML document that contains the same HIV test result data as given in Questions 1-4. Your document does not need to conform with any existing XML schema or XSD. You are free to use any existing XSD you think is relevant or make up your own.