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  Henderson-Hasselbach Equation

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

 
Input:
 
HCO3  
PaCO2  
Result:
 
pH  
 
Decimal Precision  

 
     
 

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

 
Associated Medical Subject Headings [MeSH] Terms
 
         Acid-Base Equilibrium,   Acidosis,   Alkalosis,   Computer-Assisted,   Computers,   Data Display,   Diagnosis,   Humans

 
Associated Logical Observation Identifiers Names and Codes [LOINC]
 
Parameter LOINC's and Units
HCO3 1959-6 : mEq/L      1960-4 : mEq/L      14627-4 : mEq/L      1961-2 : mEq/L      22735-5 : mEq/L      1963-8 : mEq/L      
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.

 
Associated ICD9-CM Codes
 
   276.2Acidosis
   276.3Alkalosis

 
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