OBX
OBSERVATION RESULT
The OBX segment is used to transmit a single observation or observation fragment. It represents the smallest indivisible unit of a report. Its structure is summarized in Figure 7-7.
Its principal mission is to carry information about observations in report messages. But the OBX can also be part of an observation order (see Section 4.2). In this case, the OBX carries clinical information needed by the filler to interpret the observation the filler makes. For example, an OBX is needed to report the inspired oxygen on an order for a blood oxygen to a blood gas lab, or to report the menstrual phase information which should be included on an order for a pap smear to a cytology lab. Appendix 7.A includes codes for identifying many of pieces of information needed by observation producing services to properly interpret a test result.
RRequiredOOptionalCConditionalWWithdrawn|#Date/Time*Backward compat.+Filler
16
| C.Len | Element | v2.1 | FHIR | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | ..4 | - | SI | O | 1 | - | 00569 | OBX-1 | Set ID - Observational Simple | 2 | - |
| 2 | ..2 | - | ID | R | 1 | 0125 | 00570 | OBX-2 | Value Type | 2 | - |
| 3 | ..80 | - | CE | R | 1 | - | 00571 | OBX-3 | Observation Identifier | Name | 3 mappings |
| 4 | ..20 | - | ST | C | 1 | - | 00572 | OBX-4 | Observation Sub-ID | 3 | 2 mappings |
| 5 | ..65536 | - | varies | C | 1 | - | 00573 | OBX-5 | Observation Value | 4 | 53 mappings |
| 6 | ..60 | - | CE | O | 1 | - | 00574 | OBX-6 | Units | 4 | 12 mappings |
| 7 | ..60 | - | ST | O | 1 | - | 00575 | OBX-7 | References Range | 2 | 2 mappings |
| 8 | ..10 | - | ID | O | 5 | 0078 | 00576 | OBX-8 | Abnormal Flags | 3 | 2 mappings |
| 9 | ..5 | - | NM | O | 1 | - | 00577 | OBX-9 | Probability | 2 | - |
| 10 | ..5 | - | ID | O | 1 | 0080 | 00578 | OBX-10 | Nature of Abnormal Test | Name | 4 mappings |
| 11 | ..2 | - | ID | R | 1 | 0085 | 00579 | OBX-11 | Observation result status | 2 | 12 mappings |
| 12 | ..26 | - | TS | O | 1 | - | 00580 | OBX-12 | Effective date last observation normal values | 3 | - |
| 13 | ..20 | - | ST | O | 1 | - | 00581 | OBX-13 | User Defined Access Checks | NEW | - |
| 14 | ..26 | - | TS | O | 1 | - | 00582 | OBX-14 | Date / time of the observation | NEW | 2 mappings |
| 15 | ..60 | - | CE | O | 1 | - | 00583 | OBX-15 | Producer's ID | NEW | 2 mappings |
| 16 | ..60 | - | CN_PHYSICIAN | O | 1 | - | 00584 | OBX-16 | Responsible Observer | NEW | 6 mappings |
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Editorial Comments for OBX3
Field 2
--> 7.3.2.2
BSW
Field 14
--> 7.3.2.14
BSW
Field 13
--> 7.3.2.13
BSW