This code system http://hl7.org/fhir/deviceassociation-status-reason defines the following codes:

Code Display Definition
attached Attached The device is connected to the patient.
disconnected Disconnected The device is no longer connected.
failed Failed The device has failed to work, or continue to function.
placed placed The device was placed in the patient.
replaced Replaced The device was updated with a new device or device part.
<status value="active"/> <experimental value="false"/> <publisher value="HL7 International"/> <description value="DeviceAssociation Status Reason Codes"/> <jurisdiction> <coding> <system value="http://unstats.un.org/unsd/methods/m49/m49.htm"/> <code value="001"/> <display value="World"/> </coding> </jurisdiction> <caseSensitive value="true"/> <valueSet value="http://hl7.org/fhir/ValueSet/deviceassociation-status-reason"/> <content value="complete"/> <concept> <code value="attached"/> <display value="Attached"/> <definition value="The device is connected to the patient."/> </concept> <concept> <code value="disconnected"/> <display value="Disconnected"/> <definition value="The device is no longer connected."/> </concept> <concept> <code value="failed"/> <display value="Failed"/> <definition value="The device has failed to work, or continue to function."/> </concept> <concept> <code value="placed"/> <display value="placed"/> <definition value="The device was placed in the patient."/> </concept> <concept> <code value="replaced"/> <display value="Replaced"/> <definition value="The device was updated with a new device or device part."/> </concept> </CodeSystem>