Blood Gas, Venous
Includes: pH, pCO2, pO2, Bicarbonate, Base Balance, O2 Saturation(measured), Oxyhemoglobin, Carboxyhemoglobin, Methemoglobin
Specimen Type
| Test ID |
LAB79 |
| EPIC Order |
BLOOD GAS, VENOUS |
| CPT Code(s) |
82805, 84311, 83050, 82375 |
| Group/Individual Test |
Group |
| Laboratory |
Core Laboratory-Blood Gas |
| Tube Station |
31 |
| Specimen |
Routine: |
1.5 mL whole blood in 3cc syringe w/ lyophilized heparin in BG Kit or SafePICO Collection Kit. PLEASE SPECIFY: source. See Comments |
|
Micro: |
0.5 mL whole blood in 1cc syringe w/ lyophilized heparin in BG Kit or full heparinized capillary tube. PLEASE SPECIFY: source. See Comments |
| Stability |
|
Room Temperature/Refrigerated - 30 mins
Frozen - NO
|
| Availability |
Routine: |
24 Hours/Day |
|
STAT: |
YES |
| Turnaround Time |
10 minutes |
| Reference Range |
Normal: |
See Table below |
|
Critical: |
See Table below |
| Comments |
- Blood collection tubes will not be accepted.
- Deliver Immediately. The time between specimen collection and analysis should not exceed 30 minutes.
- Syringes with needles attached will NOT be accepted
- Heparinized capillary samples can be analyzed if at least 200 µL of clot-free blood is present.
- Blood Gas Syringes may be obtained from Central Distribution.
- If temperature-corrected results are required, see test LAB5300 (Blood Gas, Venous Temperature Corrected)
- Oxygen saturation is a measure of the fraction of oxygenated hemoglobin in relation to the amount of hemoglobin capable of transporting oxygen. Oxygen saturation can be clinically misleading in the presence of dyshemoglobins such as carboxyhemoglobin and methemoglobin. This is because the oxygen-carrying capacity of the blood will be decreased but the saturation will often remain within reference limits.
- Oxyhemoglobin represents the fraction of oxygenated hemoglobin in relation to the total hemoglobin present, including non-oxygen-binding hemoglobins. In healthy individuals, oxyhemoglobin and oxygen saturation are approximately equal. In the presence of dyshemoglobins, oxyhemoglobin can be considerably lower than oxygen saturation. Although the oxygen saturation often remains within the reference limits, the oxygen-carrying capacity of the blood may be severely decreased.
|
|
Reference Range |
Critical Range |
| pH |
7.32-7.43 |
<7.20 or >7.65 |
| pCO2 |
40-60 mmHg |
<20 or >65 mmHg |
| pO2 |
30-55 mmHg (at Room Air) |
N/A |
| HCO3 |
22-27 mmol/L |
N/A |
| Base Bal |
±2 mmol/L |
N/A |
| O2 Sat |
40-85% |
N/A |
| O2 Hb |
40-85% |
N/A |
| Met Hb |
<1.5% |
>10% |
| CO Hb |
Nonsmokers=<1.2%
Smokers 1-2 packs/day=4.0-5.0%
Smokers >2 packs/day=6.0-8.0% |
>20% |
|
|
