Use Case Diagram

7.1.1 EMT - Events
Use Case Diagram Health Service Event #1 – Patient’s EHR evaluation Event Diagram

Actors

Patient
Emergency medical technician
EMR system (POS)
EHRi systems

Assumptions

There is one involved jurisdiction (for this health service encounter); also, there is one (minimum) EHR.
The patient is already registered in the EMR system.
The emergency medical technician is already logged on the EMR system.
To resolve the patient’s identification, the provincial health care number is also used, because it is key information to find the patient. In this case, the emergency medical technician uses the following key information to find the patient: name, birth date, and provincial health care number.
The resolution of the patient’s identification information is also necessary to obtain a “temporary” unique patient identifier from the EHR, to allow the user to view and update the patient’s record. The “temporary” unique patient identifier (EHRi Transaction Client ID) is provided by the EHRi only for one user session (without a break in the time), for the same patient and the same provider (person) who are engaged in the health service event. If there is an interruption during a health service, this becomes another health service event, and another resolution of the patient’s identification is required to obtain another “temporary” unique patient identifier (EHRi Transaction Client ID).
The “health profile” is an organized collection of specific events, whose definition depends on practices of each organization and jurisdiction.

Workflow Event Step	POS Action	EHRi System Action	EHR IP reference
The ambulance is en route to patient’s home, one town over from the regional hospital.
Resolution of patient’s identification (in the current jurisdiction)
One of the emergency medical technician (EMT) in the ambulance has patched into the hospital’s information system. The emergency medical technician accesses patient’s records with some key information.	The POS EMR system searches locally and finds the patient. The POS EMR system sends, to the EHRi system, a request with the key information (ex. name, birth date, provincial health care number) (and to obtain a EHRi Transaction Client ID).	The EHRi system searches and finds for the client in the current jurisdiction, with the provided key information (ex. name, birth date, provincial health care number).	EHRIP10 Search Patient
		The EHRi System Client Registry returns, to POS system, the corresponding patient record (with a EHRi Transaction Client ID).
	The POS EMR system displays the corresponding record of current patient.
Consultation of the patient’s health profile (for the current jurisdiction)
The emergency medical technician (EMT) has been able to review information through patient’s EMR and retrieves patient’s health profile.	The POS EMR system sends, to the EHRi system, a search request to obtain the patient’s health profile for the current patient (for the EHRi Transaction Client ID).	The EHRi system searches and finds (in current jurisdiction) the information of health profile for the current patient (for the EHRi Transaction Client ID).	EHRIP09 Get Patient Health Profile
		The EHRi system returns, to POS system, the health profile for the current patient.
	The POS EMR system receives, organizes and displays the patient’s health profile.
The emergency medical technician (EMT) reviews his complete past medical history, current problem list, allergies and medications.
The EMTs transport patient to the regional hospital’s emergency department.

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General Info
Name	Health Service Event #1 – Patient’s EHR evaluation Event Diagram
Type	Use Case Diagram