Shock index

The shock index (SI) is the heart rate (HR) divided by systolic blood pressure (SBP) .

The pretransport shock index can predict the need for resuscitation in the hospital[1].

Other variations are[2]:

* Shock index (SI) is the heart rate / systolic blood pressure (SBP). The normal range is 0.5–0.7
* Modified Shock Index (MSI) is the heart rate / mean arterial pressure (MAP)
* Age Shock Index (age SI) is SI * age.

Of these three measures, for GI bleeding, Age SI may better prognosticate[2].

In the ProCESS randomized controlled trial, titrating to a shock index of < 0.8 after mini-boluses of fluids, had similar mortality to other methods of monitoring fluids[3].

Additional studies have been done[4].

## References[edit | edit source]

1. ↑ St John AE, McCoy AM, Moyes AG, Guyette FX, Bulger EM, Sayre MR (2018). "Prehospital Lactate Predicts Need for Resuscitative Care in Non-hypotensive Trauma Patients". West J Emerg Med. 19 (2): 224–231. doi:10.5811/westjem.2017.10.34674. PMC 5851492. PMID 29560047.CS1 maint: Multiple names: authors list (link)
2. ↑ 2.0 2.1 Kocaoğlu S, Çetinkaya HB (2021). "Use of age shock index in determining severity of illness in patients presenting to the emergency department with gastrointestinal bleeding". Am J Emerg Med. 47: 274–278. doi:10.1016/j.ajem.2021.05.008. PMID 33993044 Check `|pmid=` value (help).
3. ↑ ProCESS Investigators. Yealy DM, Kellum JA, Huang DT, Barnato AE, Weissfeld LA; et al. (2014). "A randomized trial of protocol-based care for early septic shock". N Engl J Med. 370 (18): 1683–93. doi:10.1056/NEJMoa1401602. PMC 4101700. PMID 24635773.CS1 maint: Multiple names: authors list (link)  Review in: Ann Intern Med. 2014 Jun 17;160(12):JC9
4. ↑ van Bergen KMG, van Kooten L, Eurlings CGMJ, Foudraine NA, Lameijer H, Meeder JG; et al. (2022). "Prognostic value of the shock index and modified shock index in survivors of out-of-hospital cardiac arrest: A retrospective cohort study". Am J Emerg Med. 58: 175–185. doi:10.1016/j.ajem.2022.05.039. PMID 35696802 Check `|pmid=` value (help).CS1 maint: Multiple names: authors list (link)

Template:WH Template:WS