Vista Imaging Vista Routing How Routing Priority Works, Priority and Autorouting, Factor Values

Routing Overview Routing User Guide

How Routing Priority Works

The following factors are used to determine the priority of a routed exam:

ƒAssigned priority

ƒClinical urgency (autorouting only)

ƒTime in transmission queue

Priority and Autorouting

For automatically routed exams, the routing software uses the priority assigned in a routing rule and the clinical urgency of the exam to calculate a numeric value. Images with the highest priority value are transmitted first.

Factor	Values		Notes
Assigned priority	Low:	+250	Priority is set in routing rules as described
	Medium:	+500	on page 9.
			If not explicitly set, a default value of
	High:	+750
			Medium is used.
Clinical urgency	Routine:	+0	Values are based on the clinical urgency
	Urgent:	+10	defined for the exam in the VistA system.
	STAT:	+20

Priority and On-demand Routing

When an exam is routed on-demand, VistARad’s Route Request dialog can be used to assign a priority of Low, Medium or High. (The clinical urgency of the exam is not used). The Route Request dialog is described on page 61.

If a user selects an exam to be routed on-demand that is already in the transmission queue, the higher priority of the two instances will be used.

Other Priority Factors

If two or more entries in the transmission queue have the same priority value, entries are processed on a First In, First Out (FIFO) basis.

Because the transmission processor works on an image-by-image basis, it is possible for the images in a lower-priority exam to be interrupted ‘mid-stream’ by the images in a higher-priority exam. If this happens, transmission of all lower priority images will resume after transmission of all higher-priority images is complete.

8 VistA Imaging V. 3.0, Patch 18 April 2006