HL7 CDA Undefined clinical data

Question

I recently started studying HL7 CDA r2 documents, because I have some clinical data that needs to be as HL7 standards demands.

My doubt is the data I have (Body Mass Index (BMI), Weight, Height,BMI State, Sex, Age, Name ) doesn't fit in any template that CDA has.

Question: So, how can I build a CDA document with the data I have??

Answer 1

The simplest way to produce a CDA-compliant document would be to create an account on Microsoft HealthVault, enter the supplied information, and export as a CCD (via menus: Health Information -> More Actions -> Export Information). This will give you a CDA-compliant XML document constrained by the CCD schema, which you can find in the Things reference.

CDA only describes a generic XML structure based on HL7v3 RIM. There are multiple schemas (CCD, C32, C80, C83) which constrain this structure into something more usable. As a general rule, saying that you have a CDA document is not very helpful, since you will not be able to tightly validate or parse the data without further constraints. See this other post about the difference between CDA and CCD.

Answer 2

CDA implementations work using implementation guides that defines the data to be contained in a specific type of CDA to be used in a specific context. You should use other's implementation guides that includes the data you want to model (there are a lot online, you will find them by just googling), or create your own implementation guide and define your own templates (I tend to end doing this almost every time for my clients since they need to model very specific clinical data).