HL7 resources

HL7 ORU Message

The HL7 ORU-R01 message transmits observations and results from the producing system/filler i.e. LIS, EKG system) to the ordering system/placer (i.e. HIS, physician office application). It may also be used to transmit result data from the producing system to a medical record archival system, or to another system not part of the original order process. ORU messages are also sometimes used to register or link to clinical trials, or for medical reporting purposes for drugs and devices.

Types of observations reported in the ORU-R01 message include:

  • Clinical lab results
  • Imaging study reports
  • EKG pulmonary function study results
  • Patient condition or other data (i.e. vital signs, symptoms, allergies, notes, etc.)

The ORU message is a structured report where each observation is separated into an individual entity, and then separated into fields. ORU messages do not carry images; they use varying data types but most often use text, numbers and codes.

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HL7 Data Types

HL7 data types define the kind of data included in a field used in the HL7 message structure. Examples include a string, text, timestamp, address, or coded element.

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RIM-Reference Information Model

The HL7 Reference Information Model (RIM) represents a static model of healthcare workflows as viewed by the HL7 standards development group.

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Minimum Layer Protocol – MLP

MLP is how an application should wrap an HL7 message to ensure HL7 compliant applications know where a message starts and stops, and where the next message begins.

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