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PRL - parent result link

HL7 Component Table - PRL - parent result link
Seq# Description Implement Flags Cardinality Length C.LEN Vocabulary Data Type
1 Parent Observation Identifier [0..1]     CWE
2 Parent Observation Sub-identifier = [0..1]  20 ST
3 Parent Observation Value Descriptor [0..1]     TX

Components: <Parent Observation Identifier (CWE)> & <Parent Observation Sub-identifier (ST)> & <Parent Observation Value Descriptor (TX)>

Subcomponents for Parent Observation Identifier (CWE): <Identifier (ST)> ^ <Text (ST)> ^ <Name of Coding System (ID)> ^ <Alternate Identifier (ST)> ^ <Alternate Text (ST)> ^ <Name of Alternate Coding System (ID)> ^ <Coding System Version ID (ST)> ^ <Alternate Coding System Version ID (ST)> ^ <Original Text (ST)> ^ <Second Alternate Identifier (ST)> ^ <Second Alternate Text (ST)> ^ <Name of Second Alternate Coding System (ID)> ^ <Second Alternate Coding System Version ID (ST)> ^ <Coding System OID (ST)> ^ <Value Set OID (ST)> ^ <Value Set Version ID (DTM)> ^ <Alternate Coding System OID (ST)> ^ <Alternate Value Set OID (ST)> ^ <Alternate Value Set Version ID (DTM)> ^ <Second Alternate Coding System OID (ST)> ^ <Second Alternate Value Set OID (ST)> ^ <Second Alternate Value Set Version ID (DTM)>

Definition: Uniquely identifies the parent result’s OBX segment related to the current order, together with the information in OBR-29 - Parent.

Usage Note: This data type is applied only to OBR-26 - Parent Result where it serves to make information available for other types of linkages (e.g., toxicology). This important information, together with the information in OBR-29 - Parent, uniquely identifies the parent result’s OBX segment related to this order. The value of this OBX segment in the parent result is the organism or chemical species about which this battery reports. For example, if the current battery is an antimicrobial susceptibility, the parent results identified OBX contains a result that identifies the organism on which the susceptibility was run. This indirect linkage is preferred because the name of the organism in the parent result may undergo several preliminary values prior to finalization.

We emphasize that this field does not take the entire result field from the parent. It is meant only for the text name of the organism or chemical subspecies identified. This field is included only to provide a method for linking back to the parent result for those systems that could not generate unambiguous Observation IDs and sub-IDs.

This field is present only when the parent result is identified by OBR-29 - Parent and the parent spawns child orders for each of many results. See Chapter 7, "Observations", for more details about this linkage.

Note: Replaces the CM data type used in sections - OBR-26 and - OBR-26 as of v 2.5.

PRL-1: Parent Observation Identifier (CWE)

Definition: Contains the unique identifier of the parent observation as defined in the OBX-3 of the parent result. The value is the same as the OBX-3 of the parent.

PRL-2: Parent Observation Sub-identifier (ST)

Definition: Contains the sub-ID of the parent result as defined in the OBX-4 of the parent result. The value is the same as the OBX-4 of the parent.

PRL-3: Parent Observation Value Descriptor (TX)

Definition: Contains a descriptor of the parent observation value as specified in the OBX-5 of the parent result.

As an example, the third component may be used to record the name of the microorganism identified by the parent result directly. The organism in this case should be identified exactly as it is in the parent culture.