Oxygen Dissociation P50, RBC
| Order Code: | OXDIS50 |
| Epic Lab Code: | LAB3777 |
| Order Form: | A-1a Miscellaneous Request or Epic Req |
Commercial Mail-out Laboratory
6240 RCP
356-3527
6240 RCP
356-3527
Specimen:
Blood
Collection Medium:
 | plus control | |
| Green top tube 10 mL (Na Heparin) | Green top tube 10 mL (Na Heparin) |
Minimum:
Preferred Minimum: 5.0 mL in a green-top tube
Absolute Minimum: 1.0 mL
Absolute Minimum: 1.0 mL
Delivery Instructions:
Deliver to laboratory immediately after collection.
SPECIMENS MUST ARRIVE AT REFERENCE LABORATORY
WITHIN 72 HOURS OF DRAW.Specimen
Instructions:
Need to draw "Normal Control" to send with specimen.
Include a control specimen drawn at the same time from a normal, unrelated, non-smoking individual: draw blood in a green-top (heparin) tube(s), and send 5.0 mL fresh heparinized whole blood to other containers. Label clearly on outermost label NORMAL CONTROL. Rubber band patient specimen and control vial together.
Note: Indicate patient's date of birth.
Include a control specimen drawn at the same time from a normal, unrelated, non-smoking individual: draw blood in a green-top (heparin) tube(s), and send 5.0 mL fresh heparinized whole blood to other containers. Label clearly on outermost label NORMAL CONTROL. Rubber band patient specimen and control vial together.
Note: Indicate patient's date of birth.
Analytic Time:
3 days upon receipt at reference laboratory
Reference Range:
24-30 mm Hg
Interpretive Data:
Normal: p50=24mm Hg to 30 mm Hg (with sigmoidal O2 dissociation curve)
Comments:
Abnormal oxygen-affinity is demonstrated in the presence of some
hemoglobin variants:
-High oxygen-affinity causes erythrocytosis
-Low oxygen-affinity causes cyanosis
Increased oxygen-affinity of hemoglobin, reflected in a low p50, left- shifted oxygen dissociation curve, and loss of normal sigmoidal configuration, is characteristic of many hemoglobin variants that are responsible for polycythemia. Measurement of oxygen-affinity is the most important method for diagnosis of these disorders.
Cautions: To ensure valid results, the specimen must be < or =72 hours old.
-High oxygen-affinity causes erythrocytosis
-Low oxygen-affinity causes cyanosis
Increased oxygen-affinity of hemoglobin, reflected in a low p50, left- shifted oxygen dissociation curve, and loss of normal sigmoidal configuration, is characteristic of many hemoglobin variants that are responsible for polycythemia. Measurement of oxygen-affinity is the most important method for diagnosis of these disorders.
Cautions: To ensure valid results, the specimen must be < or =72 hours old.
Methodology:
Hemox-Analyzer Measures and Plots 0(2) Saturation
CPT Code:
82820
See Additional Information:
Specimens Requiring Immediate Delivery
Specimens Requiring Immediate Delivery