---
type: "resource-definitions"
title: "DeviceAssociation Definitions"
resource: "DeviceAssociation"
---

# DeviceAssociation Definitions

<a id="DeviceAssociation"></a>

## DeviceAssociation
A record of association or dissociation of a device with a subject (e.g. patient) and/or operator

**Definition:** A record of association or dissociation of a device with a subject (e.g. patient) and/or operator.

**Cardinality:** 0..*

**Mappings:** w5=administrative.device


<a id="DeviceAssociation.identifier"></a>

## DeviceAssociation.identifier
Instance identifier

**Definition:** Instance identifier.

**Cardinality:** 0..*

**Type:** [Identifier](/Identifier)


<a id="DeviceAssociation.device"></a>

## DeviceAssociation.device
Reference to the device that is being associated

**Definition:** Reference to the device that is being associated.

**Cardinality:** 1..1

**Type:** Reference([Device](/Device))


<a id="DeviceAssociation.relationship"></a>

## DeviceAssociation.relationship
Describes the relationship between the device and subject

**Definition:** Describes the relationship between the device and subject.

**Cardinality:** 0..*

**Type:** [CodeableConcept](/CodeableConcept)

**Binding:** extensible:[deviceassociation-relationship](/valueset-deviceassociation-relationship)


<a id="DeviceAssociation.status"></a>

## DeviceAssociation.status
active | inactive | entered-in-error | unknown

**Definition:** Indicates the state of the Device association.

**Cardinality:** 1..1

**Type:** [code](/code)

**Binding:** required:[deviceassociation-status](/valueset-deviceassociation-status)


<a id="DeviceAssociation.statusReason"></a>

## DeviceAssociation.statusReason
The reasons given for the current association status

**Definition:** The reasons given for the current association status.

**Cardinality:** 0..*

**Type:** [CodeableConcept](/CodeableConcept)

**Binding:** extensible:[deviceassociation-status-reason](/valueset-deviceassociation-status-reason)


<a id="DeviceAssociation.associationStatus"></a>

## DeviceAssociation.associationStatus
State of the device’s association

**Definition:** State of the device’s association (e.g., implanted, attached, on, off, standby, defective).

**Cardinality:** 0..1

**Type:** [CodeableConcept](/CodeableConcept)

**Binding:** preferred:[deviceassociation-association-status](/valueset-deviceassociation-association-status)


<a id="DeviceAssociation.subject"></a>

## DeviceAssociation.subject
The entity(ies) that the device is on or associated with

**Definition:** The individual, group of individuals or device that the device is on or associated with.

**Comments:** The operation reflects a shorter term indication when the device is actually being used for the subject and who the operator is.  The operator may be the same as the subject, in which case it is less likely to have to document the operation.  Where it is relevant to document periods of use, absence of the operator cannot imply that the subject is the operator, thus would need to be explicitly stated.

**Cardinality:** 0..1

**Type:** Reference([BiologicallyDerivedProduct](/BiologicallyDerivedProduct), [CareTeam](/CareTeam), [Device](/Device), [Group](/Group), [Location](/Location), [Medication](/Medication), [NutritionProduct](/NutritionProduct), [Organization](/Organization), [Patient](/Patient), [Practitioner](/Practitioner), [PractitionerRole](/PractitionerRole), [RelatedPerson](/RelatedPerson), [Specimen](/Specimen), [Substance](/Substance))


<a id="DeviceAssociation.focus"></a>

## DeviceAssociation.focus
The target of the association

**Definition:** The entity for which the device is being used, benefitting from the device, or which the device is being operated upon, which is usually distinct from the association subject, such as an operator or similar.

**Comments:** Consider the situation of a procedure, during which an anesthesiologist uses a ventilator on a patient. Two associations would be recorded: one of the ventilator associated to a subject patient with a treatment relationship; in the other, the ventilator associated to the subject anesthesiologist with an operator relationship. In the latter relationship, the patient would be recorded as the `focus` to indicate that the anesthesiologist was using the device for that patient.

**Cardinality:** 0..1

**Type:** Reference([BiologicallyDerivedProduct](/BiologicallyDerivedProduct), [CareTeam](/CareTeam), [Device](/Device), [Group](/Group), [Location](/Location), [Medication](/Medication), [NutritionProduct](/NutritionProduct), [Organization](/Organization), [Patient](/Patient), [Practitioner](/Practitioner), [PractitionerRole](/PractitionerRole), [RelatedPerson](/RelatedPerson), [Specimen](/Specimen), [Substance](/Substance))


<a id="DeviceAssociation.bodyStructure"></a>

## DeviceAssociation.bodyStructure
Current anatomical location of the device in/on subject

**Definition:** Current anatomical location of the device in/on subject.

**Cardinality:** 0..1

**Type:** Reference([BodyStructure](/BodyStructure))


<a id="DeviceAssociation.period"></a>

## DeviceAssociation.period
Begin and end dates and times for the device association

**Definition:** Begin and end dates and times for the device association.

**Cardinality:** 0..1

**Type:** [Period](/Period)