Hyperoxia test
Hyperoxia Test
The Hyperoxia Test (pronounced: hi-per-ox-ee-uh test) is a medical procedure used to determine the dependency of a patient on supplemental oxygen. The term originates from the Greek words "hyper" meaning over or excessive, and "oxia" referring to oxygen.
Definition
The Hyperoxia Test is a diagnostic procedure that involves the administration of 100% oxygen to a patient for a specified period, typically 20 minutes. The patient's arterial blood gases are then measured to assess the adequacy of oxygenation. This test is often used in neonatology to determine the need for supplemental oxygen in newborns, particularly those with Respiratory Distress Syndrome (RDS).
Procedure
The Hyperoxia Test begins with the administration of 100% oxygen to the patient via a non-rebreather mask or an oxygen hood for neonates. After 20 minutes, an arterial blood gas sample is taken to measure the levels of oxygen and carbon dioxide in the blood. If the partial pressure of oxygen (PaO2) is above a certain threshold, typically 150 mmHg, the patient is considered to be non-dependent on supplemental oxygen.
Interpretation
The results of the Hyperoxia Test can help determine the cause of hypoxemia in a patient. If the PaO2 rises significantly in response to 100% oxygen, the cause of hypoxemia is likely due to V/Q mismatch or shunt. If the PaO2 does not rise significantly, the cause is likely due to diffusion impairment or hypoventilation.
Related Terms
- Hypoxemia: A condition characterized by low levels of oxygen in the blood.
- Hyperoxia: A condition characterized by excessive levels of oxygen in the body.
- Oxygen Therapy: The administration of oxygen as a medical intervention.
External links
- Medical encyclopedia article on Hyperoxia test
- Wikipedia's article - Hyperoxia test
This WikiMD dictionary article is a stub. You can help make it a full article.
Languages: - East Asian
中文,
日本,
한국어,
South Asian
हिन्दी,
Urdu,
বাংলা,
తెలుగు,
தமிழ்,
ಕನ್ನಡ,
Southeast Asian
Indonesian,
Vietnamese,
Thai,
မြန်မာဘာသာ,
European
español,
Deutsch,
français,
русский,
português do Brasil,
Italian,
polski