Use Case Diagram

6.1.1 Community Health Centre - Events
Use Case Diagram Health Service Event #1 - Patient Assessment Event Diagram

Actors

Patient
Nurse practitioner
Health center EMR system (POS)
EHRi systems

Assumptions

There is one jurisdiction involved (e.g. the jurisdiction where the visit takes place is the same as that where the patient lives); also, there is one (minimum) EHR.
The patient is already registered in the health center’s ADT system.
The health center’s ADT system is interfaced with the health center’s EMR system. So, when a patient is created/updated in the health center’s ADT system, the patient index is automatically updated in the health center’s EMR system.
The nurse practitioner is already logged on the health center’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 nurse practitioner 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 nurse practitioner takes the history of the injury and examines the knee and the rash.
The nurse practitioner feels patient has sprained the knee and possibly torn the cartilage. She also feels he has had an allergic reaction to the NSAID Given the significant joint swelling, the nurse practitioner thinks the knee should be x-rayed to rule out a fracture and makes arrangements for the patient to be seen at the nearest hospital ER
Resolution of patient’s identification (in the current jurisdiction)
Before the patient leaves, the nurse practitioner enters the patient’s identification information in the health center’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.
Consultation of the patient’s health profile (for the current jurisdiction)
The nurse practitioner does a request through the health center’s EMR system to review the 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 nurse practitioner views his health profile containing his list of allergies.
The nurse practitioner gives him an intramuscular injection of a narcotic analgesic.

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General Info
Name	Health Service Event #1 - Patient Assessment Event Diagram
Type	Use Case Diagram