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Revised Trauma Score calculation

T. Al West talwest at mac.com
Thu May 12 01:38:06 BST 2011


John:

The "quick and dirty" RTS indeed lives on a scale of 0-12. There are 4 points each for the GCS, blood pressure, and respiratory rate components.

However, when it comes to predicting outcome (in this case, survival) based on RTS, each of those components are weighted differently, based on a mathematical regression model (I think it was a linear regression, but don't remember off the top of my head). Heavily weighted toward GCS, less so to BP and much less so to RR. If you look at the page on trauma.org, you'll see the formula

RTS = 0.9368 GCS + 0.7326 SBP + 0.2908 RR

So, 4(0.9368) + 4(0.7326) + 4(0.2908) = 7.84, which is the highest value for RTS, and represents a probability of survival of 99.8% based on empirical data.

Hope this helps!

T. Al West, MD
Acute Surgical Care Specialists
Plano, TX


On May 11, 2011, at 2:06 PM, johnbeckham51 at yahoo.com wrote:

> As a paramedic in New Orleans for some time I have the pleasure of knowing some of the doctors on this list and have the highest respect for them. I have a question about RTS, on the trauma.org website there is a RTS calculator. I input values for a stable patient and it gives RTS of 7.  I have been taught and have always been told that 12 is as high as it can be. The same page as the calculator puts the highest RTS as 7.6 or so. 
> Am I missing something or just not reading it correctly.
>   Thank you 
> John Beckham 
> 
> Sent from my HTC on the Now Network from Sprint!



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