The Saskatoon Health Region is asking people who need a routine blood test to delay it until next week.
An upgrade to the computer system at Dynacare Labs has slowed the order entry process.
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The computer system links Dynacare locations to testing facilities in hospitals.
The slowdown means clients are waiting longer than usual because staff only have limited access to the computer system.
The region is asking anyone with routine testing to delay until Monday, June 13.
Those with urgent testing should still have their blood work completed.
A team is working to resolve the computer issue and restore the system to normal operations.