Lab Information Manual

Laboratory:

Clinical Biochemistry (POC (Point of Care) TEST)

Test Name:

LACTATE (iSTAT) - (B)

Test Code: ILCA

Clinical Information:

Only available in rural Manitoba. For WRHA and Westman Lab see Lactate - (P)

State whether the sample is venous or arterial.

Collection Devices:

Preferred Device:

1 - Li Heparin, NO GEL 4.0 mL Tube(s) - Full Tube Collection

Li Heparin, NO GEL 4.0 mL Tube(s) - Full Tube Collection
Manufacturer: BD (Becton Dickinson)

Catalogue #: 367884

or Arterial Puncture: with blood gas syringe with heparin; minimum volume 1mL
or Skin Puncture: lancet and capillary collection tube (plain or with heparin) to fill line

Specimen Required:

1. Collect full tube(s) of blood; no parital draws.
2. Collect blood without using tourniquet if possible; if tourniquet is used, do not leave on longer than 1 minute.
3. Do not place samples on ice after collection.
4. For capillary collections: notify laboratory/respiratory for collection

Referral:

Only available at sites which perform iStat testing onsite.

Requisition:

Reference Values:

Venous: 0.90 - 1.70 mmol/L

Arterial: 0.36 - 1.25

Note: Reference ranges are specific to the Abbott iStat (POC instrument)

Availability:

Turn Around Time (TAT): < 60 minutes

See Also:

More Information:

Testing is performed on whole blood samples only and should be performed immediately after collection as lactate increases by as much as 70% within 30 minutes at 25°C as a result of glycolysis.
Interferences:

Substance	Concentration Producing Interference	Maximum Expected In Vivo Concentration
Bromide	25 mmol/L	Decrease (-) lactate by 40%
Cysteine	6.4 mmol/L	Decrease (-) lactate by 11%
Hydroxyurea	100 μmol/L	Increase (+) lactate 0.16 mmol/L
Glycolic Acid	10 mmol/L	Increase (+) lactate by approx. 1.96 mmol/L from an initial Lactate concentration of 1.45 mmol/L