SOFA, APACHE II and SAPS II are indices used to assess septic shock all of which take into account fluid volume

StO2 monitor (tissue perfusion monitor)

Dear Mr. Nordine,

While the scoring systems mentioned above are frequently used in ICUs, especially for outcome prediction, I strongly recommend using such scores only for study purposes and not for decision making in clinical practice, as all of them have their limitations and can never replace clinical examination and judgement tailored to individual patients. Diagnosing and treating patients in different types of shock should always be based on bedside clinical and laboratory tests.

http://www.uptodate.com/contents/shock-in-adults-types-presentation-and-diagnostic-approach

http://www.uptodate.com/contents/shock-in-adults-types-presentation-and-diagnostic-approach

Thank you all for the responses.  I wanted to see which scores were used by ED physicians ,specifically for hemorrhagic shock, for research purposes and not for clinical decision making.  Besides the shock index, are there any other relevant shock scores that are of relevance, and interest, to ED physicians. 

There is the ATLS shock classification, although it has in recent years been slightly discredited for not being a precise reflection of the real clinical state of the traumatized patients (ref's below).

http://www.sciencedirect.com/science/article/pii/S0300957211000608

http://www.sciencedirect.com/science/article/pii/S0300957210002340

http://www.sciencedirect.com/science/article/pii/S0300957212003693

http://journals.lww.com/jtrauma/Abstract/2005/04000/Can_Near_Infrared_Spectroscopy_Identify_the.23.aspx

Thank you very much Jacob for the links. The ATLS shock classification utilizes HR, SBP, GCS, and RR as indicators, which appears to not reflect the clinical reality, whereas the last article regarding NIRS, appears to reflect a more accurate clinical indicator of  hypovolemis shock. What interesting is that the shock index does not appear here as a score.

In addition to what has been mentioned:

There is the revised trauma score which is actually calculated in the large trauma registries that are kept at level 1 trauma centers: RTS=0.9368(GCS)+0.7326(SBP)+0.2908(RR)

The Denver TOF (Trauma Organ Failure) Score to predict multi-organ failure during hospitalization. Annals of Emergency Medicine. Volume 62, Issue 4, Supplement, Pages S4–S5, October 2013

During clinical practice most people work off the actual vital signs, physical exam, and bedside ultrasound findings. NIRS is still experimental within the emergency department, no standard of care.

There is some evidence that serial shock index predicts the use of vasopressors- fairly recent article so not sure if you are aware of it. 

Thanks Kimberely Ryan. I appreciate the link and will give this paper a read in the next few days and get back to you with my key finds.