Shock Index, Pediatric Age-Adjusted (SIPA)
Shock Index, Pediatric Age-adjusted (SIPA): heart rate / systolic BP compared to the age-banded elevated cutoff (1.22 for 4-6 years, 1.0 for 7-12, 0.9 for 13-16); above the cutoff is an elevated SIPA.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Age
- 5 years
- Heart rate
- 140 bpm
- Systolic BP
- 100 mmHg
Result: SI 1.40 > 1.22 cutoff: elevated SIPA.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- Elevated
- Shock index above the age-specific cutoff: higher risk of serious injury and transfusion.
- Normal
- Shock index at or below the age-specific cutoff: lower risk by SIPA.
What you enter
- Age
- Heart rate
- Systolic BP
How this is calculated
Acker SN, et al. J Pediatr Surg. 2015;50(2):331-334 (SIPA). Shock index HR/SBP vs age-specific cutoffs 1.22 / 1.0 / 0.9 for 4-6 / 7-12 / 13-16 yr. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.