Oxygen dissociation, P50

Alphabetical Test listing

Oxygen dissociation, P50-994

Test name:

Test number:

994

Excellian order number:

LAB994

Abbreviation:

MSO

Alternate names:

Hemoglobin oxygen affinity
Hemoglobin oxygen dissociation Curve
O2 Affinity
Oxygen Dissociation P50, Erythrocytes
Oxyhemoglobin Dissociation

Useful for:

Identifying hemoglobin variants associated with polycythemia or cyanotic and hypoxic disorders.

Specimen type:

Sodium heparin (Na hep) whole blood

Collection container:

Dk green Sodium heparin (Na hep), no gel

Volume:

5.0 mL

Minimum volume:

1.0 mL

Collection instructions:

Draw 5.0 mL Na Heparin (Dk Green tube without gel) from patient and at the same time draw 5.0 mL Na Heparin (Dk Green tube without gel) from unrelated, non-smoking individual as the control
Immediately following collection, mix sample by inverting 5 - 10 times to prevent clotting.

Processing instructions:

Do not open and do not spin
Label tubes - Patient and Control
Rubber-band the patient specimen and control vial together.
Refrigerate immediately after draw/labeling.

Transport container:

Dk green Sodium heparin (Na hep), no gel

Required forms/information:

Patient's age
Patient's sex

Transport and stability:

Refrigerated

Patient sample and control specimen must be received by Mayo within 72 hours of collection

Performing lab:

Mayo Clinic Laboratories (P50B): R-NX

Days set up:

Daily

TAT:

1 - 3 days

Method:

Hemox-Analyzer measures and plots O₂ saturation

Reference ranges:

< 12 months of age: not established

≥ 12 months: 24 - 30 mmHg

Clinical information:

Mayo erythrocytosis testing algorithm

CPT codes:

82820

Date created:

12/06/2007

Revised date:

11/14/2018