Step 1: Understanding the Question.
We are asked which parameter is NOT part of the Revised Trauma Score described by Champion, so we need to know exactly what this score includes.
Step 2: Key Concept.
The Revised Trauma Score (RTS), developed by Champion and colleagues, is a physiological scoring system used to judge the severity of trauma and predict outcome. It is built from three measurements taken at the bedside.
Step 3: Name the three components.
The RTS uses the Glasgow Coma Scale (a measure of the level of consciousness), systolic blood pressure (a measure of circulation), and respiratory rate (a measure of breathing). Each of these three values is given a coded score from 0 to 4, and the three coded scores are combined, with the Glasgow Coma Scale weighted the most heavily, to give the final RTS.
Step 4: Check pulse rate.
Pulse (heart) rate is not one of the three variables used in the Revised Trauma Score. It is used in other trauma tools, such as the Shock Index, but not in Champion's Revised Trauma Score.
Step 5: Final Answer.
The parameter that is NOT part of the Revised Trauma Score is
\[ \boxed{\text{Pulse rate}} \]