On 28/03/2012 03:01, pablo pazos wrote: > > > Consider this ER scenario: a BP value could be recorded each 30" or > so, and the system could be used 1. for many patients, 2. by many > users, 3. on the same machine.
this is most likely a 1-event-per-Observation scenario. I realise it is not always obvious when to use which recording approach! But the other design aspect of a COMPOSITION is that it is a 'single health system event for the patient'. Here it sounds like 1 nursing observation every 30 mins. Therefore we would expect 1 COMPOSITION for each one, each containing one OBSERVATION, containing one EVENT. > > The problem is when an item is commited, it should be as a part of a > COMPOSITION (?), so if a nurse want to record a second take of a BP > she is monitoring, and of course she wants to see the current recorded > values for that series, another COMPOSITION should be created only for > that value (or not?). if I understand correctly, you want to generate a time-based plot for e.g. last few hours' measurements. In that case, use an AQL query to get all the Observations based on BP (or whatever archetype) in a certain time frame. You can get just the systolic and diastolic values if you want. e.g. SELECT obs/path/to/*systolic*/value/magnitude, obs/path/to/*diastolic*/value/magnitude FROM e EHR [ehr_id = $ehr_id] CONTAINS comp COMPOSITION[openEHR-EHR-COMPOSITION.nursing_obs.v1] obs OBSERVATION[openEHR-EHR-OBSERVATION.bp_measurement.v1] WHERE comp/context/start_time > current_time() - P24h * * I would have to double check if I have the syntax completely right (and I put fake paths in the SELECT part), but this will return a table of systolic and diastolic pressure values (Reals) from BP measurements inside nursing observations, for the last 24h. The real paths are below: - thomas -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openehr.org/pipermail/openehr-technical_lists.openehr.org/attachments/20120328/6b54aaed/attachment-0001.html> -------------- next part -------------- A non-text attachment was scrubbed... Name: cadggeac.png Type: image/png Size: 18491 bytes Desc: not available URL: <http://lists.openehr.org/pipermail/openehr-technical_lists.openehr.org/attachments/20120328/6b54aaed/attachment-0001.png>
