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Respiratory acidosis is a condition that occurs when the lungs cannot remove all of the carbon dioxide the body produces. This causes body fluids, especially the blood, to become too acidic.
Ventilatory failure; Respiratory failure; Acidosis - respiratory
Causes of respiratory acidosis include:
Chronic respiratory acidosis occurs over a long time. This leads to a stable situation, because the kidneys increase body chemicals, such as bicarbonate, that help restore the body's acid-base balance.
Acute respiratory acidosis is a condition in which carbon dioxide builds up very quickly, before the kidneys can return the body to a state of balance.
Some people with chronic respiratory acidosis get acute respiratory acidosis because an illness makes their condition worse.
Symptoms may include:
The health care provider will perform a physical exam and ask about symptoms.
Tests that may be done include:
Treatment is aimed at the underlying disease, and may include:
How well you do depends on the disease causing the respiratory acidosis.
Complications that may result include:
Severe respiratory acidosis is a medical emergency. Seek immediate medical help if you have symptoms of this condition.
Call your provider if you have symptoms of lung disease that suddenly get worse.
DO NOT smoke. Smoking leads to the development of many severe lung diseases that can cause respiratory acidosis.
Losing weight may help prevent respiratory acidosis due to obesity (obesity-hypoventilation syndrome).
Be careful about taking sedating medicines, and never combine these medicines with alcohol.
Use your CPAP device regularly if it's been prescribed for you.
Effros RM, Swenson ER. Acid-base balance. In: Broaddus VC, Mason RJ, Ernst JD, et al, eds. Murray and Nadel's Textbook of Respiratory Medicine. 6th ed. Philadelphia, PA: Elsevier Saunders; 2016:chap 7.
Seifter JL. Acid-base disorders. In: Goldman L, Schafer AI, eds. Goldman-Cecil Medicine. 25th ed. Philadelphia, PA: Elsevier Saunders; 2016:chap 118.
Reviewed By: Denis Hadjiliadis, MD, MHS, Paul F. Harron, Jr. Associate Professor of Medicine, Pulmonary, Allergy, and Critical Care, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.