Testing UCUM Conversion Against Clinical Fixtures
Testing a UCUM converter against contrived numbers proves it can add. Testing it against clinical fixtures —…
Ucum Workshop
Prefix and Exponent Handling That's Easy to Miss
Prefix and exponent handling in UCUM look trivial and are the source of a real slice of…
UCUM in Observation.valueQuantity: The Strict Version
Observation.valueQuantity is where most clinical measurements land, and it is where UCUM adherence matters most. The FHIR…
Storing Quantities: Original Unit, Canonical Unit, or Both
A source lab sends glucose in mg/dL. Your integration ingests it, and downstream your FHIR store holds…
Handling Arbitrary Units Like 'Per Shift' That UCUM Doesn't Cover
UCUM covers real physical quantities well. "Voids per shift", "steps per day since discharge", "medication administrations per…
Unit Conversion Errors That Reach Clinical Decisions
A unit conversion error inside a demo tool is an annoyance. The same error inside a clinical…
Canonical UCUM Units the FHIR Spec Assumes You'll Use
The FHIR spec references UCUM constantly but never publishes an exhaustive "use these codes" list. It leans…
UCUM Basics for Developers Who Thought Units Were Simple
Every developer who has stored a Weight in kilograms and shipped it downstream thinks units are simple.…