Clinical Scorecard: Intensive Care Infection Score Detects Infection in Critically Ill Patients More Effectively Than Inflammatory Biomarkers
At a Glance
Category
Detail
Condition
Infection in critically ill patients
Key Mechanisms
ICIS combines selected blood-cell parameters representing innate and adaptive immune responses; higher scores indicate a greater probability of infection.
Target Population
Adults aged 18 years or older admitted to an interdisciplinary ICU; the study excluded pregnant patients.
Care Setting
Interdisciplinary ICU at a non-university secondary care hospital in Vechta, Germany.
Key Highlights
The study compared ICIS with CRP, PCT, and white blood cell count for infection diagnosis in critically ill patients.
ICIS ranges from 0 to 20, with higher scores corresponding to a greater probability of infection.
ICIS parameters are obtained from whole blood using automated gating on Sysmex XN/XR-series hematology analyzers.
The study used a clinically adjudicated reference standard incorporating microbiological, clinical, and laboratory information.
Guideline-Based Recommendations
Diagnosis
The article describes infection and sepsis as clinical diagnoses that cannot be confirmed or excluded with reliable certainty by a single biomarker or diagnostic test.
The study's reference standard combined microbiological findings, clinical condition, laboratory findings, and overall probability of infection.
Management
The article discusses individualized strategies integrating biomarkers and immune-response scoring systems as a potential aid to early, patient-specific decision-making; it does not provide a treatment protocol.
Monitoring & Follow-up
ICIS is a multiparameter score from 0 to 20; higher values correspond to a greater probability of infection.
The article reports that prior studies found ICIS results remained stable for up to 8 hours after blood sampling when analysis was delayed.
Risks
CRP, PCT, and IL-6 concentrations can be influenced by non-infectious conditions, including surgical stress and trauma.
Blood-culture-based diagnostics are the reference approach for pathogen detection but have recognized limitations in sensitivity and time to result.
Patient & Prescribing Data
Critically ill adults admitted to an ICU from 2021 through 2023; eligibility required written informed consent within 24 hours of ICU admission, and pregnancy was an exclusion criterion.
The article evaluates diagnostic tools, not a prescribed treatment. It notes that individualized diagnostic strategies may support antimicrobial stewardship, but the provided text reports no prescribing outcomes.
Clinical Best Practices
The article states that infection and sepsis remain clinical diagnoses and that no individual biomarker or diagnostic test can confirm or exclude them with reliable certainty.
The study's expert panel assessed cases using clinical, laboratory, and microbiological information.
The study classified infection and infection likely together, and infection unlikely and no infection together, for concordance analyses.
