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Respiratory Alkalosis
Respiratory alkalosis is caused by a below normal level of carbon dioxide in the blood.
When a patient hyperventilates, excesive amounts of air are moved in and out of the lungs, this exchange of oxygen for carbon dioxide is too rapid, possibly exceeding 40 breaths/minute.
This rapid breathing causes the patient to exhales too much carbon dioxide. This lowered level of carbon dioxide causes the pH of the blood to increase, leading to alkalosis.
Compensated alkalosis occurs when the body returns the acid/base balance to normal in cases of alkalosis, but bicarbonate and carbon dioxide levels remain abnormal.
Loss of CO2  
-Hyperventilation Tumors or swelling in the brain or nervous system can also cause hyperventilation.
Other stresses to the body, including pregnancy, liver failure, high elevations, or metabolic acidosis which can also trigger hyperventilation leading to respiratory alkalosis.
Carbon monoxide poisoning
Serious infection
Signs and Symptoms
Lungs Neurological



- Irritable
- Paresthesias
- Tremor
- Twitch
- Carpo-pedal spasm
- Tetany
- Seizure
- Coma
In this type of alkalosis, the pH will be elevated above 7.45. The pressure of carbon dioxide in the blood will be low, usually under 35 mmHg.
Hyperventilation, is the primary cause of respiratory alkalosis, and is also the primary symptom.