Blood Gases and Na/K, Capillary

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Test Code: CBGNAK

Overview
Ordering
Specimen
Performing
Clinical/Interpretive
Contacts
Coding

Synonyms/Keywords

Blood Gas, Cap. w/ Sodium, Potassium

Test Components

Panel includes Blood Gas (pH, partial pressure of carbon dioxide pCO2, partial pressure of oxygen pO2, bicarbonate HCO3, base excess BE, O2 Saturation), Sodium, and Potassium.

Specimen Requirements

Fasting Required	Specimen Type	Preferred Container/Tube	Acceptable Container/Tube	Specimen Volume	Specimen Minimum Volume (allows for 1 repeat)	Pediatric Minimum Volume (no repeat)
No	Whole Blood	Heparinized capillary blood gas tube		300 uL	140 jL

Collection Processing Instructions

For Capillary samples avoid milking or squeezing the puncture site. DO NOT introduce air into the collection tube. Place all capillary samples in a protective carrier for transport to the lab. Ice pack cooling is not required if sample is analyzed within 30 minutes.

Analyze immediately.

Specimen Stability Information

Specimen Type	Temperature	Time
Whole Blood	Ambient	30 min

Interference

Potassium is only stable for 20 minutes on ice. Longer delays will cause falsely elevated results.

Performing Laboratory Information

Performing Location	Day(s) Test Performed	Analytical Time	Methodology/Instrumentation
Weston	Monday through Sunday	Less than 2 hours	Radiometer
Marshfield	Monday through Sunday	Less than 2 hours	GEM 4000
Minocqua	Monday through Sunday	Less than 2 hours	GEM 4000

Reference Range Information

Performing Location	Reference Range
All Performing Sites	pH: <=1 day: 7.29-7.45 >=2 days: 7.35-7.45 pCO2: <=2 years: 27 - 41 mm Hg >=3 years: 35 - 45 mm Hg pO2: <=1 day: 54 - 95 mm Hg 2 days - <70 years: 80 - 105 mm Hg 70 years – 79 years: 70 - 90 mm Hg 80 years – 89 years: 60 - 85 mm Hg >=90 years: 50 - 80 mm Hg Calculated HCO3: <=2 years: 17 - 24 mmol/L >=3 years: 22 - 28 mmol/L Base Excess: <=2 years: -8.0 to 0.0 mmol/L >=3 years: -3.0 to 3.0 mmol/L Oxygen Saturation: All Ages: 94 – 99% Sodium: 133-144 mmol/L Potassium: Newborns (0-12 months): 3.3-5.9 mmol/L >= 12 months: 3.4-5.1 mmol/L
See Critical Value List for list of current critical values

Performing Location

Reference Range

All Performing Sites

pH:
<=1 day: 7.29-7.45
>=2 days: 7.35-7.45

pCO2:
<=2 years: 27 - 41 mm Hg
>=3 years: 35 - 45 mm Hg

pO2:
<=1 day: 54 - 95 mm Hg
2 days - <70 years: 80 - 105 mm Hg
70 years – 79 years: 70 - 90 mm Hg
80 years – 89 years: 60 - 85 mm Hg
>=90 years: 50 - 80 mm Hg

Calculated HCO3:
<=2 years: 17 - 24 mmol/L
>=3 years: 22 - 28 mmol/L

Base Excess:
<=2 years: -8.0 to 0.0 mmol/L
>=3 years: -3.0 to 3.0 mmol/L

Oxygen Saturation:
All Ages: 94 – 99%

Sodium:
133-144 mmol/L

Potassium:
Newborns (0-12 months): 3.3-5.9 mmol/L
>= 12 months: 3.4-5.1 mmol/L

See Critical Value List for list of current critical values

Synonyms/Keywords

Blood Gas, Cap. w/ Sodium, Potassium

Test Components

Panel includes Blood Gas (pH, partial pressure of carbon dioxide pCO2, partial pressure of oxygen pO2, bicarbonate HCO3, base excess BE, O2 Saturation), Sodium, and Potassium.

Ordering Applications

Ordering Application	Description

If the ordering application you are looking for is not listed, contact your local laboratory for assistance.

Specimen Requirements

Fasting Required	Specimen Type	Preferred Container/Tube	Acceptable Container/Tube	Specimen Volume	Specimen Minimum Volume (allows for 1 repeat)	Pediatric Minimum Volume (no repeat)
No	Whole Blood	Heparinized capillary blood gas tube		300 uL	140 jL

Collection Processing

Analyze immediately.

Specimen Stability Information

Specimen Type	Temperature	Time
Whole Blood	Ambient	30 min

Interference

Potassium is only stable for 20 minutes on ice. Longer delays will cause falsely elevated results.

Test Components

Panel includes Blood Gas (pH, partial pressure of carbon dioxide pCO2, partial pressure of oxygen pO2, bicarbonate HCO3, base excess BE, O2 Saturation), Sodium, and Potassium.

Reference Range Information

Performing Location	Reference Range
All Performing Sites	pH: <=1 day: 7.29-7.45 >=2 days: 7.35-7.45 pCO2: <=2 years: 27 - 41 mm Hg >=3 years: 35 - 45 mm Hg pO2: <=1 day: 54 - 95 mm Hg 2 days - <70 years: 80 - 105 mm Hg 70 years – 79 years: 70 - 90 mm Hg 80 years – 89 years: 60 - 85 mm Hg >=90 years: 50 - 80 mm Hg Calculated HCO3: <=2 years: 17 - 24 mmol/L >=3 years: 22 - 28 mmol/L Base Excess: <=2 years: -8.0 to 0.0 mmol/L >=3 years: -3.0 to 3.0 mmol/L Oxygen Saturation: All Ages: 94 – 99% Sodium: 133-144 mmol/L Potassium: Newborns (0-12 months): 3.3-5.9 mmol/L >= 12 months: 3.4-5.1 mmol/L
See Critical Value List for list of current critical values

Performing Location

Reference Range

All Performing Sites

pH:
<=1 day: 7.29-7.45
>=2 days: 7.35-7.45

Calculated HCO3:
<=2 years: 17 - 24 mmol/L
>=3 years: 22 - 28 mmol/L

Base Excess:
<=2 years: -8.0 to 0.0 mmol/L
>=3 years: -3.0 to 3.0 mmol/L

Oxygen Saturation:
All Ages: 94 – 99%

Sodium:
133-144 mmol/L

Potassium:
Newborns (0-12 months): 3.3-5.9 mmol/L
>= 12 months: 3.4-5.1 mmol/L

See Critical Value List for list of current critical values

For more information visit:

http://labtestsonline.org

Performing Laboratory Information

Performing Location	Day(s) Test Performed	Analytical Time	Methodology/Instrumentation
Weston	Monday through Sunday	Less than 2 hours	Radiometer
Marshfield	Monday through Sunday	Less than 2 hours	GEM 4000
Minocqua	Monday through Sunday	Less than 2 hours	GEM 4000

For billing questions, see Contacts

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For most current information refer to the Marshfield Laboratory online reference manual.

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26528 Blood Gases and Na/K, Capillary