description: A count of the number of measurements used in a calculation, such as Average Blood Pressure. package_name: hl7.fhir.uv.cardx-htn-mng derivation: constraint name: NumberOfMeasurements type: Extension elements: extension: {index: 0} url: pattern: {type: Uri, value: 'http://hl7.org/fhir/uv/cardx-htn-mng/StructureDefinition/NumberOfMeasurementsExt'} index: 1 value: choices: [valueInteger] index: 3 valueInteger: {type: integer, choiceOf: value, index: 4} package_version: 1.0.0-ballot extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/uv/cardx-htn-mng/StructureDefinition/NumberOfMeasurementsExt base: http://hl7.org/fhir/StructureDefinition/Extension version: 1.0.0-ballot required: [value, valueInteger]