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Doctor insights on: What Will Increase The Partial Pressure Of Oxygen In Lung Alveoli

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What will increase the partial pressure of oxygen in lung alveoli?

What will increase the partial pressure of oxygen in lung alveoli?

O2/ventilation/diet: Partial pressure of oxygen in alveoli is can be calculated using the alveolar gas equation. Oxygen level increases if there is a higher atmospheric pressure (hyperbaric chamber), higher inspired concentration of oxygen (using supplemental oxygen from a tank), lower co2 in lungs by breathing faster and deeper, raising respiratory quotient by eating more carbs, less fat. ...Read more

Lung (Definition)

Deoxygenated blood enters the lungs from the right side of the heart and travels to the lungs. When you inspire, oxygen flows into the lungs, transverses the capilliares and attaches to hemoglobin down a gradient. At the same time, co2 diffuses into the capilaries and is expelled with exhalation. Oxygen rich blood then flows to the left side of the heart and into the ...Read more


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The partial pressures of oxygen and carbon dioxide in alveoli are what compared to their partial pressures in air?

The partial pressures of oxygen and carbon dioxide in alveoli are what compared to their partial pressures in air?

O2 lower, CO2 higher: Simple question, complex & variable answer, including at sea level. Ventilation to different alveoli is continuously being adjusted, under CNS control, so as to approximate blood perfusion. This matching, referred to as vq, is critical to efficient/optimizing lung function & changes with activity, body position, etc. Rbcs capturing o2 & blood plasma for co2 separated by 2 cells from alveolar air. ...Read more

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Does chronic exercisce get the body to adapt and increase the number of alveoli in the lungs?

Does chronic exercisce get the body to adapt and increase the number of alveoli in the lungs?

No : You don't get more alveoli with exercise. But your heart gets in better shape, your muscles get stronger and more efficient at using energy. That's why exercise is so good for you. Keep it up! ...Read more

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How can emphysema reduce the amount of oxygen that diffuses into the blood ?

How can emphysema reduce the amount of oxygen that diffuses into the blood ?

Destroys the lung: Emphysema causes destruction of lung tissue. The blood vessles in the lung get destroyed in the lung. These vessles carry the blood in the lung to pick up oxygen. If they are destroyed then, oxygen can not get into the blood vessles / blood and you get low oxygen. ...Read more

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How can hyperpnea affects partial pressure of carbon dioxide and oxygen levels in the blood?

How can hyperpnea affects partial pressure of carbon dioxide and oxygen levels in the blood?

Hyperpnea/tachypnea: The rapid breathing will blow out co2 and lower its level in the blood. This may or may not affect the o2 level depending on the cause of the tachypnea. ...Read more

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How does emphysema reduce the amount of oxygen which diffuses into the blood?

How does emphysema reduce the amount of oxygen which diffuses into the blood?

From Destruction: The destruction in the lung tissue from emphysema makes the oxygen harder to cross into the blood because there is less tissue surface left. With less air sacs to participate in gas exchange, it is harder for oxygen to cross into the blood. Does that make sense? That's why people should stop smoking. ...Read more

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Please explain why no changes in partial pressure of oxygen in the case of anemia hypoxia?

Please explain why no changes in partial pressure of oxygen in the case of anemia hypoxia?

Hemoglobin: Hemoglobin has four ligands to carry o2, i believe usually 2 used.You give o2, has dissolubility, and membrane transport to enter the cells to the hemoglobin, bind and in tissues where there is acid and low o2 tension and other factors are released to those tissues for energy processing. You give more o2 and the o2 in the plasma increases but not in the saturation of the hemoglobin due to above. ...Read more

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Is it true that a build-up of fluid in the lungs will result in a reduced amount of oxygen in the blood returning to the heart?

Is it true that a build-up of fluid in the lungs will result in a reduced amount of oxygen in the blood returning to the heart?

If Bad Enough: The lungs have remarkable capacity to overcome problems with what we'd call "gas exchange", but if enough of the lung tissue is taken out of the picture (eg by being covered in fluid) then yes, the amount of oxygen brought back to the heart will definitely fall. ...Read more

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How does hyperpnea affect the amount of carbon dioxide and oxygen in the blood?

Low CO2, alkalemia: Deep or rapid breathing removes more gaseous co2 leading to less co2 in the blood and associated alkalemia - it has a minimal effect on oxygenation except in disease states. ...Read more

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Does midodrine reduce amount of blood flow in the lungs at all?

Does midodrine reduce amount of blood flow in the lungs at all?

Midodrine: Midodrine is an Alpha agonist but has relatively little data compared to most other approved drugs. It shouldn't reduce pulmonary blood flow but i can't find data to prove that. ...Read more

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What happens to the partial pressure of carbon dioxide during rapid breathing?

What happens to the partial pressure of carbon dioxide during rapid breathing?

It is decreased: Pco2 decreases with hyperventilation because carbon dioxide is a waste product produced by the body as a result of aerobic metabolism. If activity increases, metabolism increases and thus carbon dioxide increase, so we naturally breathe faster. If one hyperventilates more than the increase in metabolism, then level of carbon dioxide with be reduced, because it is being eliminated by exhalation. ...Read more

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Can heart failure cause a decrease of carbon dioxide in the blood?

Heart failure: CHF can cause a degree of acidemia. This is reflected by decreased bicarbonate (sodium bicarbonate) in the electolyte panel. This is not carbon dioxide but is related. ...Read more

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Can you have idiopathic pulmonary hypertension with normal blood oxygen levels? Does the level of oxygen in your blood correlate to the degree of PH?

Yes, no: The problem in primary pulmonary hypertension is getting blood through the lungs, not oxygenating it. This causes all kinds of misunderstanding. Since pO2 is easy to measure and pulmonary vascular resistance / blood pressure isn't, it's easy to forget how sick these folks are. ...Read more

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What R the lasting effects of a years worth of reduced cerebral blood flow due to vasoconstriction? Does the lack of proper CBF result in cell death?

What R the lasting effects of a years worth of reduced cerebral blood flow due to vasoconstriction?
Does the lack of proper CBF result in cell death?

The long term effect: of "reduced" CBF due to TEMPORARY constriction of the vessels (as in migraine) are not really known but several studies have shown that even severe chronic migraine does not reduce flow sufficiently to damage brain cells! Hope this helps! Dr Z ...Read more

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What are the chances of a small pneumothorax healing by itself, and how would the body absorb the leaked air?

What are the chances of a small pneumothorax healing by itself, and how would the body absorb the leaked air?

Yes: If it were small, it could resolve over time. That pre-supposes that the reason for the pneumothorax has sealed over and will not expand it.The gas within just diffuses across the membranes surrounding it. ...Read more

Dr. Scott Bolhack
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Oxygen (Definition)

Oxygen is a gas that the cells in your body need to work properly. The air we breathe normally has 21% oxygen. A maximum of 100% oxygen can be given. Babies with heart or lung problems may need ...Read more