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Compensation formula
Compensation formula


==Approach to acid-base disorders==
{{familytree/start |summary=Sample 1}}
{{familytree | | | | | | | | A01 |A01=Check pH on ABG}}
{{familytree | | | | |,|-|-|-|^|-|-|-|-|.| | | }}
{{familytree | | | B01 | | | | | | | |B02| | |B01=pH<7.35=Acidosis|B02=pH>7.45=Alkalosis}}
{{familytree | | | |!| | | | | | | | | |!| }}
{{familytree | | | C01 | | | | | | | | |!| |C01=Check PaCO2}}
{{familytree | |,|-|^|.| | | | | | | | |!| }}
{{familytree | D01 | | D02 | | | | | | D03 |D01=PaCO2 > 45mm Hg = Respiratory acidosis    Primary cause: hypoventilation|D02= PaCO2 Normal or < 35mm Hg = Metabolic acidosis|D03=Check PaCO2}}
{{familytree | | | | | | | | | | | |,|-|^|.| }}
{{familytree | | | | | | | | | | |E02| | E03 | |E02=PaCO2 > 45mm Hg = Metabolic alkalosis|E03=PaCO2 < 35mm Hg = Respiratory alkalosis    Primary cause: hyperventilation}}
{{familytree | | | | | | | | | | |!| | | | |!| }}
{{familytree | | | | | | | | | | F01 | | | F02 |F01=HCO3- > 29 eg. vomiting|F02=Check HCO3-}}
{{Familytree | | | | | | | | | | | | |,|-|-|^|-|-|.| | }}
{{Familytree | | | | | | | | | | | |C01 | | | | C02 |C01= Normal or slight decrease = Acute respiratory alkalosis eg. fever, panic attack| C02= Decreased < 24 = Chronic respiratory alkalosis eg. Anemia, CNS causes}}
{{familytree/end}}
== Metabolic Acidosis ==
== Metabolic Acidosis ==
{| class="wikitable"
{| class="wikitable"

Revision as of 20:02, 1 May 2018

Acid Base Disorders

Approach

Normal range

Algorithm

Compensation formula

Approach to acid-base disorders

 
 
 
 
 
 
 
Check pH on ABG
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
pH<7.35=Acidosis
 
 
 
 
 
 
 
pH>7.45=Alkalosis
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Check PaCO2
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
PaCO2 > 45mm Hg = Respiratory acidosis Primary cause: hypoventilation
 
PaCO2 Normal or < 35mm Hg = Metabolic acidosis
 
 
 
 
 
Check PaCO2
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
PaCO2 > 45mm Hg = Metabolic alkalosis
 
PaCO2 < 35mm Hg = Respiratory alkalosis Primary cause: hyperventilation
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
HCO3- > 29 eg. vomiting
 
 
Check HCO3-
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Normal or slight decrease = Acute respiratory alkalosis eg. fever, panic attack
 
 
 
Decreased < 24 = Chronic respiratory alkalosis eg. Anemia, CNS causes

Metabolic Acidosis

Disease PH Fever Poisoning

Metabolic Alkalosis

Respiratory Acidosis

Respiratory Alkalosis