UW Hospital and Clinics Lab Test Directory
| Test Name: |
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Blood Gases
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| Test Code(s): |
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BGAS / HCBGAS
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| CPT Code(s): |
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82803
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| Test Description: |
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Test Component: pH, pCO2, pO2, base excess, and actual bicarbonate.
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| Methodology: |
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Electrode
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| Request Form: |
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UWHC DOWNTIME Laboratory Request Form (UWH IPDOWNTIME, 4004202); Write in test if not on form.
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| Days Performed: |
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Daily, 24 hours.
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| Turnaround Time: |
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Stat: Less than 30 minutes. All requests processed stat.
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Specimen Requirements
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| Specimen: |
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Arterial, venous, or capillary
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| Patient Preparation: |
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None. For venous samples on outpatients, send patient to UWHC Outpatient Phlebotomy to be drawn.
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| Collection Instructions: |
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Radiometer "PICO"® syringes must be free of bubbles and clots. Two full Radiometer capillaries free of air bubbles and clots are needed for capillary blood.
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| Collection Container: |
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Preferred: Radiometer PICO® syringe
Also Acceptable:
2 full Radiometer capillary tubes
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| Collection Volume: |
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Preferred: 1.5 mL
Pediatrics: 0.5 mL
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| Sample Analyzed: |
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Whole Blood
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| Volume Required: |
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Preferred: 1.5 mL
Pediatrics: 0.5 mL
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| Specimen Transport: |
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Transport specimen to UWHC Core Laboratory (B4/220) immediately. Specimen must arrive in the Core Lab within 30 minutes of collection.
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| Unacceptable Criteria: |
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Clotted specimens, specimens with air or specimens past stability time are not acceptable.
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| Stability: |
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Ambient: 1 hour
Frozen: Not acceptable
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Interpretation
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Reference Interval:
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Arterial specimen
| pH |
10 days and up: |
7.36-7.44 |
pCO2
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0 days-23 months:
24 months and up: |
27-41 mmHg
34-46 mmHg |
| pO2, resting |
1 day and up: |
80-90 mmHg |
| Base Excess |
18 years and up: |
-2.5 to +2.5 mmol/L |
| Actual Bicarbonate |
18 years and up: |
22.0-26.0 mmol/L |
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| Critical Calls: |
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View
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pCO2 pO2 pH base excess actual bicarbonate
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