🧠 GCS-Pupils Score (GCS-P)
Refine coma assessment with the GCS-Pupils score (GCS-P).
Clinical takeaway
Extends range to 1, capturing the worst injuries.
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When to use
Add prognostic discrimination at the low end of the GCS.
How it works
GCS-P = total GCS − Pupil Reactivity Score (both reactive 0, one 1, none 2). Range 1–15.
Key points
- Extends range to 1, capturing the worst injuries.
- Improves TBI outcome prediction.
- Easy bedside extension of the GCS.
References
Decision support for licensed clinicians only; not a substitute for clinical judgement, diagnosis or local protocols.
Worked calculation
The values below come from this tool's own example placeholders and are computed server-side with the formula shown on this page, so the arithmetic can be checked quickly. It demonstrates how to substitute values only — it is not clinical advice and not a real case.
| Total GCS | 10 3–15 |
|---|---|
| Pupils unreactive to light | Both reactive (−0) |
→GCS-P10/15
- Severity：Moderate
- Formula：GCS − Pupil Reactivity Score (0/1/2)
| Total GCS | 10 3–15 |
|---|---|
| Pupils unreactive to light | Both unreactive (−2) |
→GCS-P8/15
- Severity：Severe
- Formula：GCS − Pupil Reactivity Score (0/1/2)
Frequently asked questions
- What is GCS-Pupils Score (GCS-P)?
- Refine coma assessment with the GCS-Pupils score (GCS-P).
- How is GCS-Pupils Score (GCS-P) calculated? What is the core formula?
- GCS-P = total GCS − Pupil Reactivity Score (both reactive 0, one 1, none 2). Range 1–15.
- When is GCS-Pupils Score (GCS-P) used?
- Add prognostic discrimination at the low end of the GCS.
- What are the key clinical points for GCS-Pupils Score (GCS-P)?
- Extends range to 1, capturing the worst injuries. Improves TBI outcome prediction. Easy bedside extension of the GCS.
- What are the limits and cautions when using GCS-Pupils Score (GCS-P)?
- For licensed clinicians and clinical researchers. Interpret results with history, investigations and local protocols; not a diagnosis or prescription, and not a substitute for multidisciplinary decision-making or local guidelines.
- How is GCS-Pupils Score (GCS-P) calculated in practice? Can you show a worked example?
- Inputs: Total GCS 10 3–15, Pupils unreactive to light Both reactive (−0) → Result: GCS-P 10 /15（Severity: Moderate, Formula: GCS − Pupil Reactivity Score (0/1/2)） Inputs: Total GCS 10 3–15, Pupils unreactive to light Both unreactive (−2) → Result: GCS-P 8 /15（Severity: Severe, Formula: GCS − Pupil Reactivity Score (0/1/2)）