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Test Code MISCLM Oxygen Dissociation, P50, Erythrocytes

Additional Codes

 

MAYO Test ID

P50B

EPIC Test ID

LAB2608

 

Useful For

Identifying hemoglobin variants associated with polycythemia or cyanotic and hypoxic disorders

Profile Information

Test ID Reporting Name Available Separately Always Performed
PINT P50 Interpretation No Yes
P50P Oxygen Dissociation P50 No Yes
CTRL P50 Shipping Control Vial No Yes

Testing Algorithm

See Erythrocytosis Evaluation Testing Algorithm in Special Instructions.

Method Name

Hemox-Analyzer Measures and Plots O2 Saturation

Reporting Name

Oxygen Dissociation P50, RBC

Specimen Type

Control
WB Sodium Heparin


Shipping Instructions


Specimens must arrive within 72 hours of draw.



Necessary Information


A whole blood sodium heparin specimen and a control specimen are required.



Specimen Required


Patient:

Container/Tube: Green top (sodium heparin)

Specimen Volume: 5 mL

Collection Instructions:

1. Immediately refrigerate specimens after draw. Keep at refrigerated temperatures 2 to 8° C. Do not freeze. Freezing causes sample lysis, and tests will not be performed on hemolyzed specimens.

2. Send specimen in original tube. Do not aliquot.

3. Rubber band patient specimen and control vial together. Control must accompany the patient sample at all times to ensure the reliability of testing results.

4. Be sure specimen and control are stored and transported together at refrigerate temperature, carefully following proper handling and shipping instructions.

Additional Information: Patient's age and sex are required.

 

Normal Shipping Control:

Container/Tube: Green top (sodium heparin)

Specimen Volume: 5 mL

Collection Instructions:

1. Draw a control specimen from a normal (healthy), unrelated, nonsmoking person at the same time as the patient.

2. Label clearly on outermost label normal control.

3. Immediately refrigerate specimen after draw. Keep at refrigerated temperatures 2 to 8° C. Do not freeze.

4. Send specimen in original tube. Do not aliquot.

5. Rubber band patient specimen and control vial together. Control must accompany the patient sample at all times to ensure the reliability of testing results.


Specimen Minimum Volume

1 mL

Specimen Stability Information

Specimen Type Temperature Time
Control Refrigerated 72 hours
WB Sodium Heparin Refrigerated 72 hours

Reject Due To

Hemolysis

Mild reject; Gross reject

Lipemia

NA

Icterus

NA

Other

No control vial sent, lithium heparin tube, frozen specimen

Reference Values

≥12 months: 24-30 mm Hg

Reference values have not been established for patients who are <12 months of age.

Day(s) and Time(s) Performed

Monday through Sunday

Analytic Time

1 day

Performing Laboratory

Mayo Medical Laboratories in Rochester

Test Classification

See Individual Test IDs

CPT Code Information

82820

LOINC Code Information

Test ID Test Order Name Order LOINC Value
P50B Oxygen Dissociation P50, RBC In Process

 

Result ID Test Result Name Result LOINC Value
37951 P50 Shipping Control Vial In Process
37950 Oxygen Dissociation P50, RBC In Process
37949 P50 Interpretation In Process

Forms

If not ordering electronically, complete, print, and send a Benign Hematology Test Request Form (T755) with the specimen (http://www.mayomedicallaboratories.com/it-mmfiles/benign-hematology-test-request-form.pdf)