The Clinical and Laboratory Standards Institute (CLSI) C24-ED4 guidelines 1 recommend the implementation of risk-based statistical quality control (SQC). It is recommended to design a limited interval SQC for continuous analysis processes, that is, to implement a quality control event before and after testing a limited group of samples, and the number of samples in this group is the run size, the number of quality control (QC) events in the continuous analytical process is the QC frequency. However, many SQC design tools fail to clearly provide the SQC frequency selection and design parameters required for continuous analysis process. Westgard took

Objective To study the value of serum soluble CD14 subtype (sCD14-ST) in early diagnosis of sepsis. Methods Seventy-two patients were diagnosed with systemic inflammatory response syndrome, sepsis, or septic shock. Peripheral blood was collected at 0, 12, 24, and 48 hours after admission to the hospital. Levels of sCD14-ST, procalcitonin (PCT), hypersensitive C-reactive protein (CRP), and white blood cells (WBC) were determined. Results Levels of sCD14-ST in the patients with septic shock were higher than those in the other patients (P < .01) and peaked at 48 h. PCT and CRP levels were similar in the patients at admission but increased by 5 times to 10 times in the next 48 h, especially in the patients with septic shock. WBC levels remained high and did not change dramatically. Receiver operating characteristic analysis revealed that the area under the curve, sensitivity, and specificity values of sCD14-ST to diagnose sepsis were much higher than those of the other markers. Conclusion Compared with PCT, CRP, and WBC, sCD14-ST is a better biomarker for the early diagnosis of sepsis.

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