What is the normal blood oxygen saturation level for a healthy person?

Under normal circumstances, blood oxygen saturation is divided into arterial oxygen saturation and venous oxygen saturation. The normal range of arterial oxygen saturation in healthy individuals is between 95% and 100%, while the normal range for venous oxygen saturation is between 64% and 88%. If abnormalities are detected, timely medical consultation is recommended. Detailed analysis is as follows:

Arterial oxygen saturation measures the efficiency of oxygen inhalation by the lungs and its binding with hemoglobin. In healthy adults at rest, arterial oxygen saturation typically ranges between 95% and 100%. If it occasionally drops slightly below 95% but quickly returns to normal, it generally has little impact. However, if it consistently remains between 90% and 95%, it may indicate mild respiratory or cardiovascular issues.

Venous oxygen saturation refers to the degree of oxygen binding with hemoglobin in venous blood. Since venous blood has already passed through body tissues and organs and released most of its oxygen, venous oxygen saturation is typically lower than arterial oxygen saturation. In healthy individuals, venous oxygen saturation generally ranges between 64% and 88%, although this can vary among different organs and tissues.

It is recommended to maintain a healthy lifestyle, ensure adequate sleep, improve dietary habits, adjust physical condition, and promote overall health.