F.1.7 General Purpose Performed Procedure Step Management States

The General Purpose Performed Procedure Step Object represents only the “performed” segment of the real-world procedure step and not the “scheduled” segment.

As soon as a SCU starts working on the performance of a General Purpose Performed Procedure Step ( GP-PPS), the GP-PPS object will be created and the initial status shall be set to IN PROGRESS.

Once an IN PROGRESS GP-PPS is completed, its status shall be set to COMPLETED.

The SCU may discontinue a GP-PPS at any time, provided the GP-PPS is not completed. To do so, the GP-PPS status shall be set to DISCONTINUED.

The state “DISCONTINUED” means canceled or unsuccessfully terminated which may happen when the performance of a General Purpose Procedure Step has been started but cannot be finished by the SCU. The state “COMPLETED” means that the step has been successfully completed and the SCU has provided all required attribute values for the General Purpose Performed Procedure Step.

The SCP is responsible for determining how long a GP-PPS persists once its status is COMPLETED or DISCONTINUED.

The state information related to the General Purpose Performed Procedure Step is specified by the General Purpose Performed Procedure Step IOD in the Attribute “General Purpose Performed Procedure Step Status” (0040,4002).

Table F.1-7 describes the valid General Purpose Performed Procedure Step states.

Table F.1-7

GENERAL PURPOSE PERFORMED PROCEDURE STEP STATES

State Description
In Progress Performed Procedure Step created and execution in progress
Discontinued Execution of Performed Procedure Step canceled by SCU
Completed Performed Procedure Step completed

Table F.1-8 defines the valid state transitions for the General Purpose Performed Procedure Steps. For each of the above-defined states the valid state resulting from the occurrence of events is specified. These state transitions are managed by the General Purpose Performed Procedure Step SOP Class.

Table F.1-8

GENERAL PURPOSE PERFORMED PROCEDURE STEP S TATE TRANSITION DIAGRAM

States
Events In Progress Discontinued Completed
Performed Procedure Step Discontinued Discontinued (SCU)
Performed Procedure Step Completed Completed (SCU)