User selects from a small list of possible Descriptions applicable to a particular field in a template or step in a protocol. A Simple Reference Set with corresponding Descriptions from a particular Language Reference Set may specify the set of applicable Descriptions.
Figure 6.2.5-1: Data entry using a simple reference set
Figure 6.2.5-2: Data entry using a large Reference set requires use of search techniquesSee section 4. Optimizing Searches, for further information about effective search techniques.
When a value is entered in this control it is labeled with the appropriate Concept Identifier and added to the record.
Figure 6.2.5-3: Data entry of numeric values
When selections are made using this control the appropriate Concept identifier is added to the record.
Figure 6.2.5-5: Two examples of how data entry of specific values can be foundation for automatic addition of appropriate SNOMED CT clinical findings
When specific values are entered the appropriate (defined) Concept identifier is added to the record. The above examples show how specific numeric values can lead to specific clinical findings, based on pre-defined rules.
The example at the bottom of Figure 39, illustrate that the BMI can be automatically calculated by the entered values for body weight and height. Moreover, it is possible to develop rule-based coding (i.e. algorithms that assign BMI values between 20 and 24 to the SNOMED CT Concept 35425004 | normal body mass index |, or to a more specific Concept 412768003 | body mass index 20-24 - normal |.