Performance of a multi-profile critical care testing analyzer.

Area of Science:

• Clinical Chemistry
• Medical Diagnostics
• Point-of-Care Testing

Background:

• Modern analyzers integrate blood gas, electrolyte, and metabolite measurements.
• The Stat Profile Critical Care Xpress (STP CCX) was evaluated for rapid point-of-care analysis.
• Analyzed parameters include blood gases, hematocrit, hemoglobin, electrolytes, glucose, lactate, urea, and ionized calcium/magnesium.

Purpose of the Study:

• To evaluate the performance of the STP CCX analyzer.
• Assess imprecision, recovery, and correlation with established systems.
• Determine suitability for laboratory and critical care settings.

Main Methods:

• Imprecision and recovery assessed using STP CCX controls.
• Between-day imprecision evaluated with fresh blood samples.
• Clinical sample comparison with Nova Stat Profile Ultra C and Dimension RxL systems using Deming regression and statistical tests.

Main Results:

• Coefficients of variation were within desirable limits (0.1%-4.3%).
• Recovery was consistently 100% +/- 3%.
• High correlation observed, but significant biases noted for pCO2, pO2, and chloride (Cl-).

Conclusions:

• The STP CCX is a suitable rapid diagnostic tool for critical care and laboratory use.
• Awareness of potential biases in specific analytes is crucial for accurate acid-base status assessment.
• Clinical significance of observed biases requires careful consideration by users.