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COVID-19 Severity by Shock Index and Modified Shock Index

 

Input
 

Heart Rate		/min beats/min bpm
Systolic BP		Pascal cmH2O mmHg mm[Hg] torr
Diastolic BP		Pascal cmH2O mmHg mm[Hg] torr

 
Results
 
Important: Inputs must be complete to perform calculation.

 

MAP		Pascal cmH2O mmHg mm[Hg] torr
Shock Index		# count index logit none number points score
mShock Index		# count index logit none number points score
Decimal Precision   0 1 2 3

 

Data action

 
     
 
Include literature references: Yes   No

 

 

Notes

• This calculator represents findings from the literature referenced below. It is important to understand that these findings may not be representative of the experience in your local healthcare system.
• In the Kurt article^[1] the Shock Index cutoff for hospital mortality was 0.72 with sensitivity of 71.2%, specificity of 69.6%, and ROC-AUC of 0.719. The mShock Index cutoff for hospital mortality was 1 with sensitivity of 74%, specificity of 72.4%, and a slightly better ROC-AUC of 0.739.
• BP: blood pressure; MAP: mean arterial pressure.

 
Equations used
 

MAP = ((2 * Diastolic BP) + Systolic BP) / 3

Shock Index = Heart Rate / Systolic BP

mShock Index = Heart Rate / MAP

 

 

References

1. Kurt E, Bahadirli S. The Usefulness of Shock Index and Modified Shock Index in Predicting the Outcome of COVID-19 Patients. Disaster Med Public Health Prep. 2021 Jun 8:1-6. PubMed ID: 34099089
2. Liu YC, Liu JH, Fang ZA, et al. Modified shock index and mortality rate of emergency patients. World J Emerg Med. 2012;3(2):114-7. PubMed ID: 25215048
3. Ak R, Doganay F. Comparison of four different threshold values of shock index in predicting mortality of COVID-19 patients. Disaster Med Public Health Prep. 2021 Dec 23:1-15. PubMed ID: 34937595

 

Associated Medical Subject Headings [MeSH]
 

Adult,   COVID-19,   Emergency Service,   Female,   Heart Rate,   Hospital,   Hospital Mortality,   Humans,   Hypertension,   Intensive Care Units,   Male,   Middle Aged,   ROC Curve,   Retrospective Studies,   Severity of Illness Index,   Shock,   Triage

 

Associated Logical Observation Identifiers Names and Codes [LOINC]
 

Parameter	LOINC's and Suggested Units
Heart Rate	8867-4 : beats/min      8893-0 : beats/min      8890-6 : beats/min      8889-8 : beats/min      68999-2 : beats/min      76282-3 : beats/min      69000-8 : beats/min      69001-6 : beats/min
Systolic BP	8480-6 : mmHg
Diastolic BP	8462-4 : mmHg
MAP	8478-0 : mmHg      8458-2 : mmHg      76214-6 : mmHg      75996-9 : mmHg      76536-2 : mmHg
Shock Index	98909-5 : score
mShock Index	98910-3 : score

 
This material contains content from LOINC (http://loinc.org). LOINC is copyright © 1995-2023, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee and is available at no cost under the license at http://loinc.org/license. LOINC® is a registered United States trademark of Regenstrief Institute, Inc.