Welch Allyn Connectivity Server - Programmers guide - Manual (Page 24)

20 WACS outbound HL7 protocols Welch Allyn Connectivity Server
HL7 attributes of OBX (observation/result) segments
OBX segment example
OBX|1|ST|Heart Rate^Heart Rate^WAP||80|^BPM||||||||20090127093400.000-0800
Table 10. HL7 attributes – OBX – observation/result segment
SEQ LEN DT OPT RP/# TBL# ITEM# Element name WACS
requirement
1 4 SI O 00569 Set ID - OBX R
2 2 ID C 0125 00570 Value Type R
3 250 CE R 00571 Observation Identifier R
4 20 ST C 00572 Observation Sub-ID C
5 65536 a
a. The length of the observation field is variable, depending upon value type. See OBX-2 value type.
* C Y b
b. May repeat for multipart, single answer results with appropriate data types, e.g., CE, TX, and FT data types.
00573 Observation Value R
6 250 CE O 00574 Units R
7 60 ST O 00575 References Range C
8 5 IS O Y/5 0078 00576 Abnormal Flags C
9 5 NM O 00577 Probability I
10 2 ID O Y 0080 00578 Nature of Abnormal Test N
11 1 ID R 0085 00579 Observation Result Status N
12 26 TS O 00580 Date Last Observation Normal
Value N
13 20 ST O 00581 User Defined Access Checks N
14 26 TS O 00582 Date/Time of the Observation R
15 250 CE O 00583 Producer's ID N
16 250 XCN O Y 00584 Responsible Observer N
17 250 CE O Y 00936 Observation Method N
18 22 EI O Y 01479 Equipment Instance Identifier N
19 26 TS O 01480 Date/Time of the Analysis N