An ELEMENT to represent a diagnosis of a known allergy or adverse reaction¹ event. An Adverse Reaction is any undesirable or unwanted consequence of a preventative, diagnostic, or therapeutic procedure or regimen. An Allergy is an acquired hypersensitivity caused by exposure to a particular antigen (allergen) resulting in a marked increase in reactivity to that antigen upon subsequent exposure². An allergic reaction to substance, drug or food is essentially a subset of all adverse reactions. The term allergic reaction should be used when the clinician deems the reaction to be allergic in origin. If there is uncertainty then the term adverse reaction should be used³. ^1: NPFIT-FNT-TO-DPM-0725.06 - NPfIT Message Implementation Manual 7.2.02 ^2: NPFIT-NCR-DES-0135.07 NHS Care Record Elements ^3: NPFIT-NCR-DES-0422.06 Representation of Commonly Used Concepts in the Care Record

Attributes

Name	Data type	Occurs	Description	Value Constraints
name	SC	1..1	The name, expressed as a coded value or as plain text, specifies the clinical or administrative concept to which this EHR node corresponds, as labelled in the EHR system in which it was first committed.	value Literal value(s): FINDING_OBSERVATION_ELEMENT
rc_id	II	1..1	The globally-unique identifier by which this node in the EHR hierarchy is referenced in the EHR system to which the data were first committed. This identifier shall be retained by the EHR Recipient and re-used whenever this RECORD_COMPONENT is subsequently included in another EHR_EXTRACT.
meaning	CD.CV	1..1	A code to describe a diagnosis event of an allergic or adverse reaction.	code Semantic expression constraint Literal expression constraint
synthesised	BL	1..1	This attribute value shall be TRUE if this RECORD_COMPONENT has been created in order to comply with this standard , but this point in the EHR hierarchy has no corresponding node in the EHR from which it was extracted.
obs_time	IVL_TS	0..1	The date and time, or interval, of the allergy event.
value	ANY	1..1	An ELEMENT has a single DATA_VALUE containing the value, unless this is indicated as absent by a null_flavour attribute.	nullFlavor Literal value(s): NA

COMPONENT RELATIONSHIPS

Subject of relationships

Name	Object of relationship	Occurs	Dependency
IsMotivationOf	GenericAdmissionEvent	0..*	INDEPENDENT
IsIndicationOf	ProductOrSubstanceRelatedActivity	0..*	INDEPENDENT
IsInterpretationOf	AllergyOrAdverseReactionPropensity	0..*	INDEPENDENT
IsInterpretationOf	GenericPropertyObservation	0..*	INDEPENDENT
IsInterpretationOf	GenericFindingObservation	0..*	INDEPENDENT
IsInterpretationOf	GenericPropertyObservation2	0..*	INDEPENDENT
IsInterpretationOf	GenericFindingObservation2	0..*	INDEPENDENT
HasAnnotation	Text	0..*	INDEPENDENT

Object of relationships

Name	Subject of relationship	Occurs	Dependency
HasClinicalContext	GenericAdmissionEvent2	0..*	INDEPENDENT
HasInterpretation	AllergyOrAdverseReactionPropensity	0..*	INDEPENDENT
HasIndication	ProductOrSubstanceRelatedActivity	0..*	INDEPENDENT

Item of ENTRY Domain Models

GenericAdmissionEvent

ProductOrSubstanceRelatedActivity

GenericAdmissionEvent2

AllergyOrAdverseReactionEvent

AllergyOrAdverseReactionPropensity

Reference Model Type

FINDING_OBSERVATION_ELEMENT