Test Code RTHB Hemoglobin/Saturation
Specimen and Container/Tube
Specimen Type: Whole blood
Preferred Specimen: Syringe
Other Acceptable Specimens: None
Specimen Stability
Storage Temperature |
Stability |
Room temperature |
30 minutes |
Refrigerated |
not acceptable |
Frozen |
not acceptable |
Collection Instructions
- Collect specimen per standard laboratory collection procedures.
- Remove all air from syringe.
- Remove needle.
- Cap tightly and mix well.
Specimen Handling and Transport Instructions
UCMC Onsite Instructions:
- Collect specimen per standard collection procedure and send to laboratory immediately.
- Testing must be performed within 30 minutes of collection
UCMC Offsite and UC MedLab Outreach Instructions:
- Specimens are not acceptable from offsite locations for blood gas testing
Rejection Criteria
- Common specimen rejected situations include: incorrect specimen type, insufficient volume, missing or incomplete specimen identifiers, incorrect specimen transport, or specimens outside stability limits.
- Specimens with needles attached will be rejected.
- Specimens with air bubbles.
Reference Values
Analyte |
Age |
Sex |
Normal Range |
Hemoglobin |
All |
All |
12.0 - 18.0 g/dL |
Critical Values
Analyte |
Age |
Low |
High |
Hemoglobin |
All |
NA |
>6.0 g/dL |
Turnaround Time
Turnaround times are relative to the time the specimen is received in the test laboratory.
STAT Turnaround Time: 1 hour
Routine Turnaround Time: 4 hours
Testing Schedule: 24/7
Test Components
Hemoglobin
Methodology
Direct measurement
CPT Codes
85018
LOINC Codes
718-7
Additional Information
NA
Last Review Date
4/29/2025
Volume
Preferred Volume: 0.5 mL
Minimum Volume: 0.2 mL