documentation:cdm:device

DEVICE_EXPOSURE table

THIS IS OUTDATED. All documentation is now on the github wiki. Please refer there or to the CDM working group for more information

This table changed in version 5.1 of the OMOP CDM. The fields device_exposure_start_datetime and device_exposure_end_datetime were added.

The device exposure domain captures information about a person’s exposure to a foreign physical object or instrument that which is used for diagnostic or therapeutic purposes through a mechanism beyond chemical action. Devices include implantable objects (e.g. pacemakers, stents, artificial joints), medical equipment and supplies (e.g. bandages, crutches, syringes), other instruments used in medical procedures (e.g. sutures, defibrillators) and material used in clinical care (e.g. adhesives, body material, dental material, surgical material).

Field	Required	Type	Description
device_exposure_id	Yes	integer	A system-generated unique identifier for each Device Exposure.
person_id	Yes	integer	A foreign key identifier to the Person who is subjected to the Device. The demographic details of that person are stored in the Person table.
device_concept_id	Yes	integer	A foreign key that refers to a Standard Concept identifier in the Standardized Vocabularies for the Device concept.
device_exposure_start_date	Yes	date	The date the Device or supply was applied or used.
device_exposure_start_datetime	No	datetime	The date and time the Device or supply was applied or used.
device_exposure_end_date	No	date	The date the Device or supply was removed from use.
device_exposure_end_datetime	No	datetime	The date and time the Device or supply was removed from use.
device_type_concept_id	Yes	integer	A foreign key to the predefined Concept identifier in the Standardized Vocabularies reflecting the type of Device Exposure recorded. It indicates how the Device Exposure was represented in the source data.
unique_device_id	No	varchar(50)	A UDI or equivalent identifying the instance of the Device used in the Person.
quantity	No	integer	The number of individual Devices used for the exposure.
provider_id	No	integer	A foreign key to the provider in the PROVIDER table who initiated of administered the Device.
visit_occurrence_id	No	integer	A foreign key to the visit in the VISIT table during which the device was used.
device_source_value	No	varchar(50)	The source code for the Device as it appears in the source data. This code is mapped to a standard Device Concept in the Standardized Vocabularies and the original code is stored here for reference.
device_source_ concept_id	No	integer	A foreign key to a Device Concept that refers to the code used in the source.

Conventions

The distinction between Devices or supplies and procedures are sometimes blurry, but the former are physical objects while the latter are actions, often to apply a Device or supply.
For medical devices that are regulated by the FDA, if a Unique Device Identification (UDI) is provided if available in the data source, and is recorded in the unique_device_id field.
Valid Device Concepts belong to the “Device” domain. The Concepts of this domain are derived from the DI portion of a UDI or based on other source vocabularies, like HCPCS.
A Device Type is assigned to each Device Exposure to track from what source the information was drawn or inferred. The valid domain_id for these Concepts is “Device Type”.
The Visit during which the Device was first used is recorded through a reference to the VISIT_OCCURRENCE table. This information is not always available.
The Provider exposing the patient to the Device is recorded through a reference to the PROVIDER table. This information is not always available.