cliot (version 1.0.0)

gcs_pupils_score: GCS-Pupils (GCS-P) Score

Description

Calculates the GCS-P score, which combines the standard Glasgow Coma Scale (GCS) with an assessment of pupil reactivity. This score extends the range of injury severity assessment, particularly for patients with severe TBI (GCS 3), by subtracting points for unreactive pupils. The score ranges from 1 to 15.

Usage

gcs_pupils_score(gcs_total, pupils_unreactive_count)

Value

A list containing:

GCS_P_Score

The calculated GCS-P score (Range 1-15).

Interpretation

General mortality risk trend associated with the score.

Arguments

gcs_total

Numeric (3-15). The standard total Glasgow Coma Scale score (Eye + Verbal + Motor).

pupils_unreactive_count

Numeric (0, 1, or 2). The number of pupils unreactive to light. 0: Both pupils reactive (Score adjustment: 0). 1: One pupil unreactive (Score adjustment: -1). 2: Both pupils unreactive (Score adjustment: -2).

References

Brennan PM, Murray GD, Teasdale GM. Simplifying the use of prognostic information in traumatic brain injury. Part 1: The GCS-Pupils score: an extended index of clinical severity. J Neurosurg. 2018;128(6):1612-1620. doi:10.3171/2017.12.JNS172780

Examples

# Example 1: Severe TBI with blown pupils
# GCS 3, 2 unreactive pupils
# Score = 3 - 2 = 1
gcs_pupils_score(3, 2)

# Example 2: Moderate TBI
# GCS 10, Reactive pupils
# Score = 10 - 0 = 10
gcs_pupils_score(10, 0)