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Utility of Shock Index and Pediatric Age-Adjusted Shock Index in Predicting Severe Sepsis and Septic Shock
Raziye Merve Yaradilmiş1, Aytaç Göktuğ2, İlknur Bodur3
1Department of Pediatric Emergency Care, Etlik City Hospital, Ankara.
Insights
The shock index (SI) and pediatric age-adjusted shock index (SIPA) aid in early sepsis recognition in children. Combining these with lactate or immature granulocytes (IG%) improves accuracy in pediatric emergency departments.
Area of Science:
- Pediatric Emergency Medicine
- Critical Care
- Clinical Diagnostics
Background:
- Early recognition of severe sepsis and septic shock in pediatric emergency departments (PEDs) is critical for effective treatment.
- The shock index (SI) and pediatric age-adjusted shock index (SIPA) show promise for early risk stratification.
- This study evaluated the predictive performance of SI, SIPA, and modified indices for severe outcomes.
Purpose of the Study:
- To assess the predictive performance of SI, SIPA, and modified shock index variations in identifying severe sepsis and septic shock in pediatric patients.
- To determine the utility of these noninvasive tools in the pediatric emergency department setting.
Main Methods:
- A retrospective cohort study of 238 pediatric patients (1 month to 18 years) meeting systemic inflammatory response syndrome criteria.
- Collected clinical data and vital signs, calculating SI, SIPA, and modified indices.
- Recorded biomarkers including lactate and immature granulocyte percentage (IG%).
Main Results:
- Severe sepsis or septic shock occurred in 20.6% of patients (49/238).
- SI (≥1.81) demonstrated an AUC of 0.815 with 81.6% sensitivity and 67.7% specificity.
- Age-specific SI cutoffs improved prediction, especially in younger children. Combining SI with IG% or lactate enhanced diagnostic accuracy.
Conclusions:
- SI and SIPA are practical tools for early sepsis detection in children.
- Age adjustment of SI enhances its accuracy.
- Integration of SI with biomarkers like IG% and lactate can improve clinical decision-making in PEDs.
Introduction:
Early recognition of severe sepsis and septic shock in the pediatric emergency department (PED) is crucial for the success of early targeted therapy. The shock index (SI) and pediatric age-adjusted shock index (SIPA) are promising noninvasive tools for early risk stratification. This study aimed to evaluate the predictive performance of SI, SIPA, and modified indexes in severe outcomes.
Methods:
This single-center retrospective cohort study included 238 pediatric patients aged 1 month to 18 years who met systemic inflammatory response syndrome criteria. Clinical findings and vital signs were collected at presentation. SI, SIPA, and modified indices were calculated using heart rate and systolic blood pressure. Biomarkers, including lactate and immature granulocyte percentage (IG%), were also recorded.
Results:
Of 238 patients, 49 (20.6%) had severe sepsis or septic shock. SI ≥1.81 showed an AUC of 0.815, sensitivity of 81.6%, and specificity of 67.7%. SIPA had a sensitivity of 91.8% but a lower specificity (45.0%). Pediatric Shock Index and Temperature-adjusted and Age-adjusted Mean Shock Index had AUCs of 0.443 and 0.734, respectively. Age-specific SI cutoffs improved predictive performance, particularly in younger children. Combining SI with IG% or lactate enhances diagnostic accuracy.
Conclusions:
SI and SIPA are practical tools for early recognition of severe sepsis in children. Age-adjusted SI cutoffs improve accuracy. Diagnostic performance was further enhanced when combined with IG% and lactate, supporting their integration in PED clinical decision-making.
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