Alberta Precision Laboratories

--- Query Results ---

Organization:

Alberta Precision Laboratories

Message Alert:

PLEASE NOTE: This Test Directory is in an interim state and due to changes pertaining to the DynaLIFE transition, performing site for routing has not been updated. Please refer to Laboratory Information System for appropriate routing.

Test Name/Synonym:

Phenytoin Level, Total (Synonym: Dilantin, PHENY)

Ordering Alert:

Record time of last dose on requisition or in electronic ordering system.

Collection Alert:

For oral therapy, collection time should be consistent for a given patient (trough levels are not imperative because of long half-life). For IV therapy, collect greater than 2 hours after end of dose.

Best practice is to not draw from an intravenous line through which the drug has been administered as it can produce erroneous results and impact patient care. If best practice is not possible, prior consultation with the most responsible health practitioner is required.

LABID (Connect Care):

LAB31

Primary Container:

MINT LIHEP PST

Alternate Containers:

GOLD SST

Minimum Collection Volume:

Calgary Zone: 0.2 mL plasma or serum
Central, Edmonton, North, South Zones: 0.5 mL plasma or serum

Test Resources:

General Laboratory Requisition – 21302

Half-life and Time to Steady State

Calgary Zone: Microcollection Minimum Whole Blood Volumes

Calgary Zone: Critical Values

Reference Interval:

Target Range

Age	umol/L
Less than or equal to 3 months	25 - 55
Greater than 3 months	40 - 80

Critical Value:

Age	umol/L
Less than or equal to 3 months	Greater than 80
Greater than 3 months	Greater than 120

Appended to high or critical results:
If needed, consult Poison and Drug Information Service (PADIS) at 1-800-332-1414 for the clinical management of possible drug toxicity.

Testing Area:

Biochemistry

Performing Site:

Calgary Zone	Foothills Medical Centre Peter Lougheed Centre Rockyview General Hospital South Health Campus
Central Zone	Red Deer Regional Hospital Centre
Edmonton Zone	Royal Alexandra Hospital University of Alberta Hospital
North Zone	Grande Prairie Regional Hospital Northern Lights Regional Health Centre (FMH)
South Zone	Chinook Regional Hospital, Lethbridge Medicine Hat Regional Hospital

Additional Test Information:

Steady state: 1-5 weeks (zero order kinetics)

Last Updated On:

Thursday, February 1, 2024