The GELLO in this worked example is set up to run when a reticulocyte count Observation is present.
We need to access this data however in the script. Here is some GELLO to proceed with, in the IDE:
Context HL7_v2_VMR_V1::IncomingObservation
imports iso_21090_datatypes
Let metadata = Tuple {
title = 'Test high reticulocytes',
keywords = Sequence{'Test'},
version = 1,
revision = 1,
date = '20240816',
mode = 'CLIENT',
author = 'Medical-Objects',
identifier = 'COMMENT_GELLO:Test_Retics',
purpose = 'For testing new GELLO IDE',
includesList = Sequence{'14196-0^^LN'},
excludesList = Sequence{}
}
-- Set up codes
Let retic_LN: CD = CD{code = '14196-0',codeSystem = '2.16.840.1.113883.6.1', codeSystemName ='LOINC'}
-- get the incoming observation and any vmr data
Let incoming_retic = observations->select(observationCode.implies(retic_LN).value)
->sortedBy(dateTime).last()
----------------
incoming_retic
We are setting up a Concept Descriptor (CD) typed object. We then use the implies method as a collection operator on the observation class in the context of this incoming observation, sorting any multiple values and getting the last and usually the only one.
Then we return this.
To run in the GELLO IDE you can use the Run and Debug button on the LHS: 
Then Run the GELLO: 
The result may be viewed top LHS:
Its a good idea to close the session, find the red square which is the stop button: 
. Its easy to have several debug/ run sessions happening at once so keep an eye on that and stop them when desired.
Finally to close, just close the window tab.
