Oygen contained in the blood before reaching the lungs.
2007-09-13 15:19:07 · 3 answers · asked by Wendz 1 in Health ➔ Diseases & Conditions ➔ Respiratory Diseases
To simplify the answer given by the poster above, first you ask about the oxygen level of the blood leaving the lungs, (oxygenated blood is the blood leaving the lungs) and then you "explain" your question as "blood before reaching the lungs".
Which answer do you want?
2007-09-13 16:47:53 · answer #1 · answered by Gray Wanderer 7 · 0⤊ 0⤋
If you are talking about the PaO2 in the blood, which is the partial pressure of oxygen dissolved in the blood, as measured on an arterial blood gas, in a normal person should be 90-100 mmHg. This is the value after leaving the heart but before reaching the tissues.
However, if you are talking about venous blood returning to the lungs from the tissues, then you are talking about a VBG (venous blood gas) as opposed to an ABG (arterial blood gas), and normal PaO2 should be around 40 mmHg.
These two are not the same as oxygen saturation of hemoglobin.
2007-09-13 15:32:32 · answer #2 · answered by poke22 2 · 1⤊ 0⤋
Well, if we're talking about BEFORE reaching the lungs, it would be pretty low. That would be deoxygenated blood, though.
2007-09-13 15:30:58 · answer #3 · answered by nursekuba 5 · 0⤊ 0⤋