Use Case Diagram

2.1.2 Chlamydia Notification - Events
Use Case Diagram Health Service Event #1 – Lab analysis Event Diagram

Actors

Lab Clinician
Lab Information system (POS)
EHRi systems

Assumptions

There is one involved jurisdiction; also, there is one (minimum) EHR.
The Lab Clinician is already logged on the Lab Information system.
The Lab Clinician requests only the lab orders for the current jurisdiction and a specific patient; the Lab Clinician uses a jurisdictional laboratory system (domain) and the Lab events are only indexed in the EHR.
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 Lab Clinician 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).
In this case, the Lab Clinician also sends a notification to ordering physician to inform him that the results are available. The POS can also manage this notification by directly sending another form of notification to the ordering physician (ex.: to his POS, on his pager).
When the Lab Clinician records the positive Chlamydia result, the system also sends a notification to inform Public Health. The POS can also manage this notification by directly sending another form of notification to the Health Public (ex.: to Health Public POS, on pager).
For the EHR, a notification is a class of event, which links together some clinical events for a specific provider (and it gives him right access to these clinical events).

Workflow Event Step	POS Action	EHRi System Action	EHR IP reference
Resolution of patient’s identification (in the current jurisdiction)
The Lab Clinician obtains the specimens and enters the identification information of patient in the Lab Information system.	The POS Lab Information system sends, to the EHRi system, a request with the key information (ex. name, birth date, provincial health care number) to search for the patient.	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 the corresponding patient record to POS system (with a EHRi Transaction Client ID).
	The POS Lab Information system displays the corresponding record of current patient.
Execution of lab orders (in the current jurisdiction)
The Lab Clinician consults the lab orders of this patient in the Lab Information system.	The POS Lab Information system searches the lab orders (with the EHRi Transaction Client ID).
	The POS Lab Information system displays the lab orders for the current patient.
The Lab Clinician processes the swabs and obtains the results. The gonorrhoea swab is negative but the Chlamydia is positive. The Lab Clinician completes the lab orders with the corresponding lab results in the Lab Information system with notifications to ordering physician and Public Health.	The POS Lab Information system adds (with the EHRi Transaction Client ID) the lab result events for the corresponding lab orders in the current jurisdiction, with notifications to ordering physician and Public Health.	The EHRi system indexes the new lab result events (for the EHRi Transaction Client ID) and adds notifications events to specific providers (ordering physician and Public Health).	EHRIP 19 Index Event (Event Type = Lab Result) EHRIP15 Put Event (Event Type = Lab Result – Reportable Disease) (Event Type = Notification – Reportable Disease)
		The EHRi system returns an acknowledgment to POS system that the update request is completed.
	The POS Lab Information system displays an acknowledgment about the completed update request.

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General Info
Name	Health Service Event #1 – Lab analysis Event Diagram
Type	Use Case Diagram