Choose the bounded laboratory conclusion

The first point at which evidence changes is the T+2 hour lactate decline from 3.8 to 2.6 mmol/L. It supports improving perfusion in a properly collected, method-continuous trend. It does not diagnose sepsis or prove the treatment caused the decline.

The CRP change from 62 to 68 mg/L over two hours is neither a failed-response signal nor proof that response is absent. An early or isolated CRP is nonspecific, and CRP rises and falls too slowly for lack of decline at two hours to show failed response. The PCT change from 1.1 to 0.6 ng/mL at 18 hours is compatible with a falling stimulus, but assay, renal function, and dialysis timing must be considered.

The defensible release interpretation names the abnormal result, the relevant limitation, and the context it supports. It does not convert an intermediate PCT band, elevated CRP, or elevated lactate into a stand-alone sepsis label. When the conclusion needs the phrase proves sepsis, revise it to state the signal and missing evidence.