TEST

CODE

SPECIMEN REQUIREMENT

VACUTAINER

BILLING

LOC

G6PD, QUANTITATIVE

(GLUCOSE–6–PHOSPHATE

DEHYDROGENASE)

G6PD

Blood

Collect Monday-Thursday ONLY. If Friday is a statutory holiday, ONLY collect Monday-Wednesday.

Do not collect within 30 days of a Hemolytic episode

Do not open tube

Store and ship both samples refrigerated.

TAT—1day

2 LAVENDER

OHIP

LL

G6PD, ROUTINE SCREENING

(GLUCOSE–6–PHOSPHATE

DEHYDROGENASE)

 

TEST NO LONGER AVAILABLE

 

 

 

GABAPENTIN

(NEURONTIN)

GAB

Serum, 2 mL

Collect specimen 10 to 12 hours after last dose.

Record time in hours that have elapsed between last dose and specimen collection.

Clot for 30 minutes and

Centrifuge as soon as possible. Separate and freeze aliquot.

Store and transport frozen

TAT – 20 days

PLAIN RED

OHIP

LL

GALACTOSE–1–PHOSPHATE

URIDYL TRANSFERASE

 

TEST NO LONGER AVAILABLE

 

 

 

GALECTIN-3

RCML

Serum,1 mL

Centrifuge and separate.

Store and transport refrigerated.

TAT – 14 days

YELLOW SST

$85.00

LL

GAM

See IMMUNOGLOBULIN, QUANTITATIVE

RCML

 

 

 

 

GAMMA–GLUTAMYL

TRANSPEPTIDASE

(GGT)

(GGTP)

GGT

Serum

Centrifuge only

TAT – 1 day

YELLOW SST

OHIP

BTL

GAMMOPATHY SCREEN

(MONOCLONAL PROTEIN)

See PROTEIN ELECTROPHORESIS

SPE

 

 

 

 

GANGLIOSIDE ANTIBODY

(GM1 GANGLIOSIDE ANTIBODY)

(ANTI-GM1 GANGLIOSIDE)

RCML

Serum

Centrifuge and separate

Store and transport refrigerated

DO NOT USE SST TUBES

TAT – 30 days

PLAIN RED

$30.00

LL

GASTRIN

 RCML

Serum, 2 mL

Recommended that the patient be fasting for 12 hour prior to collection

Centrifuge and separate within 30 minutes

Store and transport frozen

TAT – 10 days

YELLOW SST

 OHIP

 LL

GCFT

(GONOCOCCAL COMPLEMENT FIXATION TEST)

(GONOCCAL INFECTION)

 

TEST NO LONGER AVAILABLE

 

 

 

GENOTYPE

(BLOOD GROUP, Rh(D) AND GENOTYPE)

See ABO, Rh(D), GENOTYPE

RCML

 

 

 

GENTAMICIN, PEAK

(POST)

GAP

Serum, 1 mL

Collect ½ hour after IV infusion, or 1-2 hours after IM injection.

Record time in minutes that has elapsed between last dose and specimen collection.

Centrifuge and separate

Store and transport frozen

TAT—5-10 days

PLAIN RED

OHIP

LL

GENTAMICIN, TROUGH

(PRE)

GAT

Serum, 1 mL

Collect prior to IV infusion or IM injection.

Record time in minutes that has elapsed between last dose and specimen collection.

Centrifuge and separate

Store and transport frozen

TAT – 5 to 10 days

PLAIN RED

OHIP

LL

GGT

(GGPT)

See GAMMA–GLUTAMYL TRANSPEPTIDASE

GGT

 

 

 

 

GLIADIN ANTIBODY

(ANTI–GLIADIN)

See AGA

ANGLI

 

 

 

 

GLOBULIN

GLOB

Serum

Centrifuge only

TAT – 1 day

YELLOW SST

OHIP

BTL

GLOMERULAR BASEMENT MEMBRANE ANTIBODY

AGBM

Serum

Centrifuge only

TAT – 20 days

YELLOW SST

$40.00

LL

GLUCAGON

RCML

Plasma

Collect fasting specimen in pre-chilled tube.

After draw, chill whole blood on ice for minimum 10 minutes

Centrifuge and separate. Freeze ASAP.

Store and transport frozen.

Thawed specimens are unsuitable for analysis

TAT – 14 days

LAVENDER

$70.00

LL

GLUCOSE

FASTING

RANDOM

PC (Codes for PC entry vary)

IF BOTH RANDOM AND FASTING

 

 

FGL

RGL

 

2GL

Serum

Centrifuge only

*If PC sample, specify time on tube

(i.e. 1 HR PC or 2 HR PC)

TAT – 1 day

YELLOW SST

OHIP

BTL

GLUCOSE CHALLENGE,

GESTATIONAL SCREEN

50g glucose load

GL50PD

Plasma/Serum

Centrifuge only

Give patient 50 g glucose drink

Collect a grey or yellow top tube 1 hr after drink given

Record glucose load given

*Fasting Sample not required

TAT – 1 day

GREY

or

YELLOW SST

OHIP

BTL

GLUCOSE GESTATIONAL

TOLERANCE

75g glucose load

**Entry code varies, depending on GTT intervals requested**

GL75PD

Plasma/Serum

Centrifuge only

Collect a fasting grey or yellow top tube

Urine samples not required

DO NOT COLLECT A 3 HR SPECIMEN

Give patient 75 g glucose drink

Collect a grey or yellow top tube 1 hr and 2 hrs after drink consumed

Record glucose load given

Indicate time interval on every specimen

TAT – 1 day

GREY

or

YELLOW SST

OHIP

BTL

 

 

 

 

 

 

GLUCOSE TOLERANCE, STANDARD TEST

(NON-PREGNANT)

75g glucose load

 

**Entry code varies, depending on GTT intervals requested**

 

 

 

 

 

UGL

FGL

 

 

 

 

GL1H

GL2H

 

 

 

 

 

 

 

GL3H

GL4H

GL5H

 

 

 

 

GL0.5H

GL1.5H

GL2.5H

Plasma or serum / Urine

Do not centrifuge urine

Centrifuge plasma/serum tubes

 

Patient MUST be fasting

Collect a fasting urine sample

Collect a fasting grey or yellow top tube

 

Give patient 75g glucose load drink

Collect a grey or yellow top tube for each timed interval requested:

1 hour and

2 hour

 

Record glucose load given

Additional hourly intervals may be requested by doctor

 

Code only for the last hourly interval ordered:

3 hour glucose requested

4 hour glucose requested

5 hour glucose requested

 

Additional half hour intervals may be requested by the doctor

Code for each interval that is collected:

½ hour glucose requested

1 ½ hour glucose requested

2 ½ hour glucose requested

 

Note: If fasting urine is not collected record in “Notes and Instructions” and on the OHIP requisition

TAT – 1 day

GREY

or

YELLOW SST

OHIP

BTL

GLUCOSE–6–PHOSPHATE

DEHYDROGENASE ASSAY

See G6PD

 

 

 

 

 

GLUCOSE, QUALITATIVE

RCML

Urine, 10 mL( random)

Submit in an orange or white cap container tube

TAT – 1 day

 

OHIP

LL

GLUTETHIMIDE

See DORIDEN

 

 

 

 

 

GLYCOPROTEIN ALPHA SUBUNIT

(ALPHA 1 GLYCOPROTEIN)

 

TEST NO LONGER AVAILABLE

 

 

 

GLYCOSYLATED HEMOGLOBIN

(HbA1C, HEMOGLOBIN A1C)

See A1C

A1C

 

 

 

 

GOLD

 

TEST NO LONGER AVAILABLE

 

 

 

GONORRHOEAE

(GC,GONOCOCCUS)

See CHLAMYDIA (for urine and swab sources)

 

 

 

 

GONORRHOEAE CULTURE

(GC,GONOCOCCUS)

(Neisseria gonorrhoeae CULTURE)

GC

Swab—State source

Submit swab in charcoal transport media

Store and transport at room temperature within 72 hours of collection

TAT—48 hours if negative

TAT- If positive referred to PHL

 

OHIP

BTL

GRAM STAIN

SMEAR

Smear – state source

Label frosted end of prepared slide with pencil

TAT – 1 day

 

OHIP

BTL

GROWTH HORMONE

(HGH)

(HUMAN GROWTH HORMONE)

(SOMATOTROPIN)

GH

Serum, 2 mL

Centrifuge and separate within 30 minutes

Store and transport frozen

TAT – 10 days

YELLOW SST

OHIP

LL

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