Use Case Diagram

5.1.2 DM Clinic - Events
Use Case Diagram Health Service Event #1 – Patient assessment Event Diagram

Actors

Patient
Nutritionist
Hospital’s EMR system (POS)
EHRi systems

Assumptions

There is one involved jurisdiction; also, there is one (minimum) EHR.
The patient is already registered in the hospital’s ADT system.
The nutritionist uses an EMR system and he is already logged on this system.
The hospital’s ADT system is interfaced with the hospital’s EMR system. So, when a patient is created/updated in the hospital’s ADT system, the patient index is automatically updated in the hospital’s 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 nutritionist 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 nutritionist wants to see the most recent blood glucose results event, so the search request is only for detail event of health service encounter, not the health service encounter.
The summary list of health service events contains only the key identifiers of each selected (with parameters) health service events. The detail of the selected health service event can contain many sub-events.

Workflow Event Step	POS Action	EHRi System Action	EHR IP reference
The nutritionist reviews patient’s diet with her.
Resolution of patient’s identification (in the current jurisdiction)
The nutritionist verifies the identification information and enters them in the hospital’s EMR system.	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.
View specific events (in the current jurisdiction)
The nutritionist confirms the patient’s identity and does a request, through the hospital’s EMR system, to search for the most recent blood glucose results.	The POS EMR system sends, to the EHRi system, a search request to find the most recent blood glucose results for the current patient (for the EHRi Transaction Client ID).	The EHRi system searches and finds the health service events about most recent blood glucose results for the current patient (for the EHRi Transaction Client ID).	EHRIP12 List Events (Event Type = blood glucose)
		The EHRi system sends, to POS system, a summary list with key identifiers indicated in the health service events.
	The POS EMR system receives and displays the summary list of health service events.
The nutritionist looks at the summary list of health service events and selects an event to see more detail.	The POS EMR system sends, to the EHRi system, a search request, with the key identifiers indicated in the selected health service event, to find the detail of the selected health service event for the current patient (for the EHRi Transaction Client ID).	The EHRi system searches, with the key identifiers indicated in the selected health service event, and finds the detail of event in the selected health service event.	EHRIP13 Get Event
		The EHRi system returns, to POS system, the detail of health service event.
	The POS EMR system displays the detail of health service event.
The nutritionist views the most recent blood glucose results.
Together they create a nutrition plan to help reduce patient’s weight and blood sugar.

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General Info
Name	Health Service Event #1 – Patient assessment Event Diagram
Type	Use Case Diagram