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Henderson-Hasselbach Equation

 

Input
 

HCO3		mEq/L mmol/L
PaCO2		Pascal cmH2O mmHg torr

 
Result
 
Important: Inputs must be complete to perform calculation.

 

pH
Decimal Precision   0 1 2 3

 

     
 
Include literature references: Yes   No

 

 

 
Equations used
 

pH = 6.1 + log(HCO3 / (0.03 * PaCO2))

 

 

References

1. Bleich HL. Computer Evaluation of Acid-Base Disorders. J Clin Invest. 1969; 48:1689-1696. PubMed ID: 4898409

 

Associated Medical Subject Headings [MeSH]
 

Acid-Base Equilibrium,   Acidosis,   Alkalosis,   Computer-Assisted,   Computers,   Data Display,   Diagnosis,   Humans

 

Associated Logical Observation Identifiers Names and Codes [LOINC]
 

Parameter	LOINC's and Suggested Units
HCO3	2028-9 : mmol/L      1959-6 : mEq/L      1960-4 : mEq/L      14627-4 : mEq/L      1961-2 : mEq/L      22735-5 : mEq/L      1963-8 : mEq/L
PaCO2	2019-8 : mmHg      34705-4 : mmHg
pH	11558-4 : units      2753-2 : units      2744-1 : units      2745-8 : units      2746-6 : units

 
This material contains content from LOINC® (http://loinc.org). The LOINC table, LOINC codes, and LOINC panels and forms file are copyright © 1995-2014, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee and available at no cost under the license at http://loinc.org/terms-of-use.