Revised Trauma Score Calculator

The Revised Trauma Score calculator helps calculate the Revised Trauma Score (RTS) from three key measurements: Glasgow Coma Scale (GCS), systolic blood pressure (SBP), and respiratory rate (RR).

The calculator can convert raw patient values into standard coded scores and then apply the Revised Trauma Score formula. It can also calculate RTS directly from coded values.

RTS is a physiologic trauma scoring system. A higher score reflects less physiologic derangement, while a lower score reflects greater derangement.

What Is the Revised Trauma Score?

The Revised Trauma Score (RTS) is a trauma assessment score based on GCS, systolic blood pressure, and respiratory rate. Each measurement receives a coded value from 0 to 4.

The three coded values are then weighted. This produces the final RTS, with a maximum score of 7.8408.

The RTS is different from the Injury Severity Score (ISS). RTS uses physiologic measurements, while ISS is an anatomic injury scoring system. They may be used together in trauma assessment systems such as TRISS.

Revised Trauma Score Scale

The RTS coding scale is based on these ranges.

GCS Coding

GCS 13–15 = 4

GCS 9–12 = 3

GCS 6–8 = 2

GCS 4–5 = 1

GCS 3 = 0

Systolic Blood Pressure Coding

SBP greater than 89 mmHg = 4

SBP 76–89 mmHg = 3

SBP 50–75 mmHg = 2

SBP 1–49 mmHg = 1

SBP 0 mmHg = 0

Respiratory Rate Coding

RR 10–29 breaths/min = 4

RR greater than 29 breaths/min = 3

RR 6–9 breaths/min = 2

RR 1–5 breaths/min = 1

RR 0 breaths/min = 0

Revised Trauma Score Formula

The core Revised Trauma Score formula is:

RTS = (0.9368 × GCSᶜ) + (0.7326 × SBPᶜ) + (0.2908 × RRᶜ)

Here, GCSᶜ, SBPᶜ, and RRᶜ are the coded values from 0 to 4.

The maximum RTS is:

RTS = (0.9368 × 4) + (0.7326 × 4) + (0.2908 × 4)

RTS = 7.8408

Therefore, the Revised Trauma Score range in this weighted system is 0 to 7.8408.

How to Use Online Revised Trauma Score Calculator Step by Step

1. Enter the GCS. Enter the patient's Glasgow Coma Scale value from 3 to 15.
2. Enter systolic blood pressure. Enter SBP in mmHg. The calculator converts the value to its RTS coded score.
3. Enter respiratory rate. Enter RR in breaths per minute. The calculator assigns the correct coded value.
4. Calculate the RTS. The calculator applies the correct weighting coefficients to the three coded values and adds them together.
5. Review the result. The calculator displays the final Revised Trauma Score and its percentage of the maximum possible score.

Example Revised Trauma Score Calculation

Suppose the inputs are:

GCS = 12

SBP = 80 mmHg

RR = 24 breaths/min

First, convert the measurements to coded values.

GCS 12 → GCSᶜ = 3

SBP 80 → SBPᶜ = 3

RR 24 → RRᶜ = 4

Now apply the formula:

RTS = (0.9368 × 3) + (0.7326 × 3) + (0.2908 × 4)

RTS = 2.8104 + 2.1978 + 1.1632

RTS = 6.1714

The resulting Revised Trauma Score is 6.1714.

The percentage of maximum is calculated as:

(6.1714 ÷ 7.8408) × 100 ≈ 78.7%

This means the calculated score is about 78.7% of the maximum weighted RTS.

Revised Trauma Score Use

The revised trauma scoring system provides a standardized way to combine important physiologic measurements into one score. It is commonly discussed in trauma assessment and outcome prediction.

RTS should be interpreted in the appropriate clinical context. It is not a diagnosis and should not replace professional trauma assessment.

Final Verdict

The Revised Trauma Score calculator makes RTS calculation easier by handling the coding and weighted formula automatically. Enter GCS, SBP, and RR, and the calculator converts the values, applies the RTS coefficients, and gives the final score.

The key formula is:

RTS = (0.9368 × GCSᶜ) + (0.7326 × SBPᶜ) + (0.2908 × RRᶜ)

FAQs

What is the Revised Trauma Score?

The Revised Trauma Score is a physiologic trauma score based on GCS, systolic blood pressure, and respiratory rate.

What is the Revised Trauma Score range?

Using the weighted RTS formula in this calculator, the score ranges from 0 to 7.8408.

What is the Revised Trauma Score of 11?

A weighted RTS calculated with this formula cannot be 11 because its maximum is 7.8408. A value such as 11 may refer to a different trauma scoring system or an unweighted scoring method.

Is RTS the same as ISS?

No. RTS is based on physiologic measurements. ISS is based on the severity of anatomical injuries.

What does a lower RTS indicate?

A lower RTS indicates greater physiologic derangement in the three measured components. RTS should be interpreted with the patient's complete clinical condition.

Can I calculate RTS from coded values?

Yes. This calculator supports direct coded inputs from 0 to 4 for GCSᶜ, SBPᶜ, and RRᶜ.