hemoximetry

arterial blood oximetry

A clinical test that quantifies carboxyhaemoglobin (COHb) and methemoglobin, and calculates the content of O2 bound to haemoglobin (Hb). ABO is indicated in patients with anaemia or polycythaemia, for evaluating altered Hbs, O2 content of the blood, and to correlate the findings of arterial blood gas analysis.
 
Specimen
Arterial blood; because the analyte, carbon monoxide, is unstable, the specimen must be sent to the lab on ice and analysed as soon as possible.
 
Ref value
COHb < 1.5%; heavy smokers ≥ 5%.

hem·ox·im·e·try

(hēm'oks-im'ĕ-trē)
Spectrophotometric analysis of blood for determination of the saturation of oxyhemoglobin and of dyshemoglobins (e.g., carboxyhemoglobin, methemoglobin).
Synonym(s): haemoximetry.
References in periodicals archive ?
If a low-affinity hemoglobin is suspected after the common cardiovascular and pulmonary causes have been ruled out, diagnostic testing should make use of HPLC and determination of the full oxygen-dissociation curve [partial pressure of [O.sub.2] at which hemoglobin is half-saturated ([P.sub.50]) and the Hill coefficient] by hemoximetry. Oxygen saturation and [P.sub.50] calculated from the pH and the oxygen pressure ([Po.sub.2]) should be used with caution, owing to the assumptions used with these calculations regarding normal 2,3-diphosphoglycerate concentrations and no abnormal hemoglobin.
(8.) AARC clinical practice guideline: blood gas analysis and hemoximetry: 2001 revision and update.
Arterial oxygen status determined with routine pH/blood gas equipment and multi-wavelength hemoximetry: reference values, precision and accuracy.