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CRIT CARE/AQUEOUS BLOOD GAS W/CHEM - AQ4
AQ4
Analytes/procedures in bold type are regulated for proficiency testing by the Centers for Medicare & Medicaid Services (CMS).

Analyte Challenges/Shipment Number of Shipments
Calcium, ionized 2 Three shipments per year
Chloride 5
Hematocrit 5
Hemoglobin, estimated 5
Lactate 2
PCO2 5
pH 5
PO2 5
Potassium 5
Sodium 5
tCO2 5
Creatinine 5
Glucose 5
Urea nitrogen (BUN) 5

For second instrument reporting options, see the Quality Cross Check programs, AQ3Q or AQ4Q.


For i-STAT instrument usage, see chart.

  • AQ4 ‑ Ten 2.5‑mL specimens (two duplicate sets) for i‑STAT methods only
  • Conventional and International System of Units (SI) reporting offered

  • Shipment A: February 22

  • Shipment B: June 20

  • Shipment C: October 17






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