http://hl7.org/fhir/StructureDefinition/DeviceUseStatement|4.0.1

A record of a device being used by a patient where the record is the result of a report from the patient or another clinician.

Name	Flags	Card	Type	Description & Constraints
DeviceUseStatement		0..*		Record of use of a device
identifier	Σ	0..*	Identifier	External identifier for this record
basedOn	Σ	0..*	Reference	Fulfills plan, proposal or order
status *	?!Σ	1..1	code	active \| completed \| entered-in-error + DeviceUseStatementStatus (required)
subject *	Σ	1..1	Reference	Patient using device
derivedFrom	Σ	0..*	Reference	Supporting information
timing[x]	Σ	0..1		How often the device was used
timingTiming	Σ	0..1	Timing
timingPeriod	Σ	0..1	Period
timingDateTime	Σ	0..1	dateTime
recordedOn	Σ	0..1	dateTime	When statement was recorded
source	Σ	0..1	Reference	Who made the statement
device *	Σ	1..1	Reference	Reference to device used
reasonCode	Σ	0..*	CodeableConcept	Why device was used
reasonReference	Σ	0..*	Reference	Why was DeviceUseStatement performed?
bodySite	Σ	0..1	CodeableConcept	Target body site BodySite (example)
note		0..*	Annotation	Addition details (comments, instructions)