Carbon Dioxide, Total

Method

Spectrophotometric

Reference Ranges

(individual methods listed below)

Default Method

Units: mEq/L

Female		Male		Unknown
Age	Range	Age	Range	Age	Range
0-	22-32	0-	22-32	0-	22-32

Effective date: 03/01/2015

FHCC Peninsula Lab - Roche

Units: mEq/L

Female		Male		Unknown
Age	Range	Age	Range	Age	Range
0-	22-29	0-	22-29

Effective date: 12/10/2025

Specimen Type

Blood

Collection

HMC and UWMC Onsite Locations

Preferred: 4 mL blood in LIME GREEN PST tube
Also Acceptable: 4 mL blood in ORANGE RST, GOLD SST, RED TOP or GREEN TOP tube
Pediatric: 1 Full LIME GREEN MICROTAINER
Unacceptable: GRAY TOP

Offsite Clinic or Other Locations

Preferred: 4 mL blood in GOLD SST tube
Also Acceptable: 4 mL blood in ORANGE RST or LIME GREEN PST, RED TOP or GREEN TOP tube
Pediatric: 1 Full LIME GREEN MICROTAINER
Unacceptable: GRAY TOP

Handling Instructions

Note:CO2 cannot be added onto a specimen more than 8 hours after the specimen is received by the laboratory.

Quantity

Requested: 0.5 mL serum/plasma
Minimum: 0.2 mL serum/plasma

Lab Department

Chemistry, Automated Panels(CHA)

Frequency

Daily

Available STAT?

Yes

Performing Location(s)

HMC	Chemistry, Automated 206-520-4600 325 9th Ave, Rm # GWH-47, Seattle, WA 98104-2420
UW-NW	Main Lab 206-668-1344 UW Medical Center – Northwest 1550 N 115th Street, A200 Seattle, WA 98133
UW-MT	Chemistry, Automated 206-520-4600 Clinical Lab, Room NW220, University of Washington Medical Center, 1959 NE Pacific street, Seattle, WA 98195
FHCC	Fred Hutch Alliance Lab 206-606-1088 825 Eastlake Ave, Seattle, WA 98109	Fax: 206-606-2027 Hours of Operation: 6:00 a.m. - 10:00 p.m. Includes satellite labs: • SAIM - Sloan Clinic 1, 6th Floor • FHH3 - Sloan Clinic 2, 3rd Floor • FHH4 - Sloan Clinic 2, 4th Floor
FHCC	Fred Hutch Community Lab, Evergreen Campus 425-441-2640 10240 NE 128th St Kirkland, WA 98034	Fax: 425-441-2707 Hours of Operation: 7:30 a.m. - 5:00 p.m.
FHCC	FHCC Peninsula Laboratory 19917 7th Ave NE Ste 100, Poulsbo, WA 98370-6555	Phone: 360-842-5116 Fax: 360-842-5150 Hours of Operation: 8:00 a.m. - 5:00 p.m.

General Information