Use Case Diagram

5.1.4 ER visit - Events
Use Case Diagram Health Service Event #2 – Exam and lab orders Event Diagram

Actors

Patient
ER physician
ER’s EMR system (POS)
EHRi systems

Assumptions

The hospital’s ADT system is interfaced with the ER’s EMR system. So, when a patient is created/updated in the hospital’s ADT system, the patient index is automatically updated in the ER’s EMR system.
The ER physician is already logged on the ER’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 ER physician 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).
There is a jurisdictional laboratory domain.

Workflow Event Step	POS Action	EHRi System Action	EHR IP reference
The patient is seen by the ER physician.
Resolution of patient’s identification (in the current jurisdiction)
The ER physician verifies the identification information and enters them in the ER’s EMR system.	The POS EMR system searches and finds locally the identification of 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 the client, in the current jurisdiction, with the provided key information (ex. name, birth date, provincial health care number) and finds the client.	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.
Exam and lab orders (in the current jurisdiction)
The ER physician obtains some history of the present illness, examines the patient and finds a blood pressure of 148/98.
The ER physician orders some blood tests, including blood glucose and creatinine, and urinalysis through the ER’s EMR system.	The POS EMR system is updated with the lab orders. The POS EMR system sends, to the EHRi system, an update request to record the lab orders events for the current patient (for the EHRi Transaction Client ID).	The EHRi system adds the labs orders events for the current patient (for the EHRi Transaction Client ID).	EHRIP15 Put Event (Event Type = Lab Orders)
		The EHRi system returns, to POS system, an acknowledgment that the update request is completed.
	The POS EMR system displays an acknowledgment about the completed update request.

Get SVG Format

General Info
Name	Health Service Event #2 – Exam and lab orders Event Diagram
Type	Use Case Diagram