Complex
Primitive
ActivityDefinition
CapabilityStatement
CodeSystem
Composition
ConceptMap
Encounter
Library
List
Measure
MessageHeader
Observation
Patient
PlanDefinition
Questionnaire
Resource
ServiceDefinition
StructureDefinition
StructureMap
ValueSet
default
Base StructureDefinition for SampledData Type
SampledData
Path
SampledData
Id
SampledData
Cardinality
0 - *
Definition
A series of measurements taken by a device, with upper and lower limits. There may be more than one dimension in the data.
Comment
The data is not interpretable without at least origin, period, and dimensions, but these are optional to allow a separation between the template of measurement and the actual measurement, such as between DeviceCapabilities and DeviceLog. When providing a summary view (for example with Observation.value[x]) SampledData should be represented with a brief display text such as "Sampled Data".
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Condition
ele-1
Path
SampledData.origin
Id
SampledData.origin
Type
Cardinality
1 - 1
Definition
The base quantity that a measured value of zero represents. In addition, this provides the units of the entire measurement series.
Comment
Path
SampledData.origin.Quantity.value
Id
Quantity.value
Type
Cardinality
0 - 1
Definition
The value of the measured amount. The value includes an implicit precision in the presentation of the value.
Comment
The implicit precision in the value should always be honored. Monetary values have their own rules for handling precision (refer to standard accounting text books).
Requirements
Precision is handled implicitly in almost all cases of measurement.
Path
SampledData.origin.Quantity.comparator
Id
Quantity.comparator
Type
Cardinality
0 - 1
Definition
How the value should be understood and represented - whether the actual value is greater or less than the stated value due to measurement issues; e.g. if the comparator is "<" , then the real value is < stated value.
Comment
This is labeled as "Is Modifier" because the comparator modifies the interpretation of the value significantly. If there is no comparator, then there is no modification of the value.
Requirements
Need a framework for handling measures where the value is <5ug/L or >400mg/L due to the limitations of measuring methodology.
Path
SampledData.origin.Quantity.unit
Id
Quantity.unit
Type
Cardinality
0 - 1
Definition
A human-readable form of the unit.
Comment
Requirements
There are many representations for units of measure and in many contexts, particular representations are fixed and required. I.e. mcg for micrograms.
Path
SampledData.origin.Quantity.system
Id
Quantity.system
Type
Cardinality
0 - 1
Definition
The identification of the system that provides the coded form of the unit.
Comment
Requirements
Need to know the system that defines the coded form of the unit.
Condition
qty-3
Path
SampledData.origin.Quantity.code
Id
Quantity.code
Type
Cardinality
0 - 1
Definition
A computer processable form of the unit in some unit representation system.
Comment
The preferred system is UCUM, but SNOMED CT can also be used (for customary units) or ISO 4217 for currency. The context of use may additionally require a code from a particular system.
Requirements
Need a computable form of the unit that is fixed across all forms. UCUM provides this for quantities, but SNOMED CT provides many units of interest.
Path
SampledData.period
Id
SampledData.period
Type
Cardinality
1 - 1
Definition
The length of time between sampling times, measured in milliseconds.
Comment
This is usually a whole number.
Path
SampledData.factor
Id
SampledData.factor
Type
Cardinality
0 - 1
Definition
A correction factor that is applied to the sampled data points before they are added to the origin.
Comment
Path
SampledData.lowerLimit
Id
SampledData.lowerLimit
Type
Cardinality
0 - 1
Definition
The lower limit of detection of the measured points. This is needed if any of the data points have the value "L" (lower than detection limit).
Comment
Path
SampledData.upperLimit
Id
SampledData.upperLimit
Type
Cardinality
0 - 1
Definition
The upper limit of detection of the measured points. This is needed if any of the data points have the value "U" (higher than detection limit).
Comment
Path
SampledData.dimensions
Id
SampledData.dimensions
Type
Cardinality
1 - 1
Definition
The number of sample points at each time point. If this value is greater than one, then the dimensions will be interlaced - all the sample points for a point in time will be recorded at once.
Comment
If there is more than one dimension, the code for the type of data will define the meaning of the dimensions (typically ECG data).
Path
SampledData.data
Id
SampledData.data
Type
Cardinality
1 - 1
Definition
A series of data points which are decimal values separated by a single space (character u20). The special values "E" (error), "L" (below detection limit) and "U" (above detection limit) can also be used in place of a decimal value.
Comment