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UW Health SMPH
American Family Children's Hospital

UW Hospital and Clinics Lab Test Directory

Test Name: pH

Test Code(s): PH / HCPH

CPT Code(s): 82800

Test Description: Included In: Blood Gases Panel

Methodology: Electrode

Request Form: UWHC DOWNTIME Laboratory Request Form (UWH IPDOWNTIME, 4004202); Write in test if not on form.

Days Performed: Daily, 24 hours.

Turnaround Time: Stat: Up to 30 minutes. All requests processed stat.


Specimen Requirements

Specimen: Arterial, venous, or capillary

Patient Preparation: None. For venous samples on outpatients, send patient to UWHC Outpatient Phlebotomy to be drawn.

Collection Instructions: 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.  

Collection Container: Preferred: Radiometer PICO® syringe
Also Acceptable: 2 full Radiometer capillary tubes, Green top

Collection Volume: Preferred: 1.5 mL
Pediatrics: 0.5 mL

Sample Analyzed: Whole Blood

Volume Required: Preferred: 1.5 mL
Pediatrics: 0.5 mL

Specimen Transport: Transport specimen to UWHC Core Laboratory (B4/220) immediately. Specimen must arrive in the UWHC Core Lab within 30 minutes.

Unacceptable Criteria: Clotted specimens, specimens with air or specimens past stability time are not acceptable.

Stability: Ambient: 1 hour
Frozen: Not acceptable


Interpretation

Reference Interval:
Arterial Blood:  
1 day - 10 days: 7.29-7.45
11 days and up: 7.36-7.44

Critical Calls: View

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