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Test Code MCOOX POC Blood Gas, Mixed Venous (GEM 5000)

Specimen and Container/Tube

Specimen Type: Whole Blood

Preferred Specimen: Mixed Venous Whole Blood, heparinized or non-heparinized syringe

Other Acceptable specimens: N/A

Specimen Stability

Storage Temperature

Stability

Room temperature

 

5 minutes

 

Refrigerated

Not Acceptable

Frozen

 Not Acceptable

 

 

 

 

 

Collection Instructions

  • Collect specimen per standard collection procedure.
  • Remove all air from syringe.
  • Sample must be well mixed and free of clots.

 

Note: Prior to testing, invert syringe at least twice and roll between outstretched palms at least 5 times.

 

Specimen Handling and Transport Instructions

UCMC Onsite Instructions: 

  • Collect whole blood specimen indicating the collection site.
  • Testing should be performed immediately after collection.

UCMC Offsite and UC MedLab Outreach Instructions: 

N/A

Rejection Criteria

  • Insufficient volume.
  • Outside stability limits.
  • Specimen with air bubbles.

Reference Values

 

Adult
 Analytes    Measured or    Calculated?

                             MCOOX                                      (Mixed Venous sample                         Reference  Range)                          

 Units  
pO2 Measured 35 - 50  mmHg 
tHb Measured 12.0 - 18.0 g/dL
O2Hb Calculated 67.0 - 75.0 %
COHb Calculated <3.0 %
MetHb Calculated <2.0 %
SO2 Measured 70.0 - 76.0 %

 

Turnaround Time

 

STAT Turnaround Time: N/A

Routine Turnaround Time: N/A

Testing Schedule: 24/7

Clinical Indications

Diagnosis of acid/base disorders

Methodology

Amperometry: pO2

Optical (CO-oximetry): SO2, hemoglobin, oxyhemoglobin, carboxyhemoglobin, methemoglobin

CPT Codes

82805; 82375; 83050

LOINC Codes

19211-2, 34969-6, 30351-1, 41648-7, 41607-3, 19224-5

Synonyms/Keyword Search

Mixed Venous Blood Gas

POC Mixed Venous Blood Gas

Last Review Date

3/6/26

Critical Values

Analyte Age Range Low High Unit
tHb (total Hemoglobin) Any age <6 N/A g/dL
COHb (Carboxyhemoglobin) Any age N/A >20 %
MetHb (Methemoglobin) Any age N/A >10 %

 

Test Components

pO2, Hemoglobin, Oxyhemoglobin, Carboxyhemoglobin, Methemoglobin, SO2

Additional Information

The GEM Premier5000 analyzer is a portable critical care system to rapidly analyze heparinized and non-heparinized whole blood samples to assure expedient and accurate results during the diagnostic blood sampling portion of a cardiac catheterization.

Volume

Preferred Volume: 0.5 mL

Minimum Volume: 0.2 mL