Stef, In the LOINC timing axis point in time means that the measurement was done at a specific time point. I'd be interested to know how this is different. Ssusan
>From the LOINC Manual: "One can either measure a property at a moment (point) in time or measure it over a time interval and integrate, in the mathematical sense, over time. In the latter case, we aggregate a "series" of physiologic states into a single scalar value that reflects some "average" property measured over the specified time interval. Intervals also have relevance for rate measurements such as excretion (substance rate or mass rate) or clearances (volume rates). The amount over an interval is often expressed as a mass rate (MRAT, e.g. g/24h) or a substance rate (SRAT, e.g. mol/24h). Interval measurements often apply to urine and stool (e.g. collection over 24 hours and calculation of a concentration, total amount, or clearance). They also apply to clinical measurements such as urine outputs where we have shift totals and 24-hour totals. Event counts on physiologic monitors, such as the number of premature ventricular contractions (PVCs) over 24 hours on a Holter monitor, are also of this type." Susan Matney, R.N., M.S. email: susan.matney at siemens.com remote office: (801) 298-4642 voice mail: (610) 219-1941 cell: (801) 680-2161 -----Original Message----- From: [email protected] [mailto:openehr-clinical-bounces at openehr.org] On Behalf Of Stef Verlinden Sent: Wednesday, May 16, 2007 11:15 AM To: openehr-clinical at openehr.org Subject: Point in time Hi all. I need some help in understanding the concept 'point in time'. As far as I understand it now the completion date/time of an event (f.i. a blood pressure measurement) is registered as a point in time in the event section of the archetype. Thing is that I expected to find an entry field where I can enter that particular date and time. In the EHR_IM I found the Action class (p.71) which purpose seems to be to capture/record those points in time, is I figured that's the place to be. So I went back and looked into the template blood pressure developed by the NHS_UK (.../knowledge/templates/dev-uk-nhs/html/Blood% 20pressure.html). There one finds the annotation 'event' (any event) nicely illustrated with a clock. But still no 'place' where one could enter the date and time of the event that took place. Can somebody please explain to me how this works? Cheers, Stef Verlinden _______________________________________________ openEHR-clinical mailing list openEHR-clinical at openehr.org http://lists.chime.ucl.ac.uk/mailman/listinfo/openehr-clinical ---------------------------------------------------------------------------- This message and any included attachments are from Siemens Medical Solutions and are intended only for the addressee(s). The information contained herein may include trade secrets or privileged or otherwise confidential information. Unauthorized review, forwarding, printing, copying, distributing, or using such information is strictly prohibited and may be unlawful. If you received this message in error, or have reason to believe you are not authorized to receive it, please promptly delete this message and notify the sender by e-mail with a copy to Central.SecurityOffice at siemens.com Thank you
