Regional Quality Control Survey of Blood-Gas Analysis

Proficiency testing for blood-gas quality control.

We have conducted a voluntary, community blood-gas proficiency testing program, with use of tonometered human blood, for 32 analyzers located in 16 laboratories. Instruments initially showed inaccuracies as large as -30.8 to +17.3% for po(2), and -14.0 to +42.9% for pco(2), but inaccuracy and imprecision decreased in most laboratories during the program. For a typical 15-week period, mean group...

Use of equilibrated blood for internal blood-gas quality control.

We have used equilibrated human blood for blood-gas quality control since 1970. In blood equilibrated 24 h after shedding, gas tensions are stable for 4 to 6 h at 0 to 4 degrees C; each control specimen is analyzed several times during that period to resolve malfunctions, etc. Three-fourths of all errors in gas-tension measurement detected with equilibrated blood were detected with the highest-...

A stable blood product for pH-blood-gas quality control.

We describe how to prepare, store, and use a hemolyzed blood product for simultaneous pH, pCO2, and pO2 quality control. Tonometry of the blood product with two oxygen and two carbon dioxide concentrations resulted in consistent and reproducible values during 38 weeks. The resulting pH values were consistent and reproducible, demonstrating the metabolic acid-base stability of the blood product....

Production, formulation and quality control of [13N]NH3 compound for PET imaging of regional blood flow [Persian]

In this study, 16O(p,α)13N nuclear reaction was chosen as the best method of N-13 production. High purity natural water targets were bombarded by 18 MeV protons with an intensity of 8μA. A production yield of 13.5 mCi/μAh was obtained. Chemical modification of 13N-nitrogen oxides into [13N]NH3 was accomplished using De Varda's catalyst. Chemical, radiochemical and radionuclide purity cont...

Survey of blood gas interpretation.