Doctor insights on:
Hypoxia And Hypercapnia
See below: Increase in breathing and access to oxygen!
Hypercapnia is excessive build up of co2 (carbon dioxide), which is normally primarily cleared by the lungs. Co2 can build up due to hypoventilation (decreased breathing, such as in sleep apnea) or poor exchange of gas between lung and blood, such as in emphysema. Over production of co2 can make clearing it more difficult for the lung to keep up, but this ...Read more
Not a feeling: Some patients are chronically hypercarbic, and feel normal; if the change is rapid, patients feel very short of breath (eg as though they are suffocating), if it is slightly s ower in onset they may become very sleepy/confused (co2 narcosis).
CO2 retention: Hypercapnia is excessive build up of co2 (carbon dioxide), which is normally primarily cleared by the lungs. Co2 can build up due to hypoventilation (decreased breathing, such as in sleep apnea) or poor exchange of gas between lung and blood, such as in emphysema. Over production of co2 can make clearing it more difficult for the lung to keep up, but this is rarely the case.
Yes. In the brain.: Hypercapnea does increase blood flow in the brain by causing cerebral vessel vasodilation. This is part of a process in the brain termed cerebral autoregulation. It also can lead to peripheral vasodilation by direct effects on blood vessels. This may also lead to increased blood flow. However, this would not be a desirable effect for anything other than the body's normal response to changes in ph.
Sleep apnea: Obstructive sleep apnea or chronic lung disease can cause hypercapnea. Also overdosing on pain medications and sedatives will decrease the breathing rate resulting in hypercapnea.
Lot of info behind this, but why would person get hypercapnia, 1 req. Vent, 3 mo in a row all of a sudden if has had asthma/bad lungs for yrs?
Asthma: This depends on many things. Asthma can simply be a progressive disease getting worse and worse damaging the lung tissue. There's probably some component of emphysema which is much worse than asthma. Did the person smoke? Did they take care of themselves? Did they treat the asthma appropriately?
I had a co2 blood test done and it said I was at 27, which is close to 30 (hypercapnia). Should I be worried? I had a brief exposure to concrete dust
TCO2: TCO2 on the blood test (usually electrolyte panel) represents bicarbonate (sodium bicarbonate) and volatile CO2 and is different from arterial CO2 = partial pressure of CO2 in the blood, which is done usually in the hospital setting. Most adult values are in that range (24-32). When it is high it suggest that you may have chronic respiratory acidosis, but 27 is fine
Yes: One of the mechanisms of hypecapnia is airway obstruction.
Not alwasy: The more inefficient the damaged lung becomes at eliminating co2 the more you have to work to breath and the more work the more co2 you make. Once co2 is up for a period of time your body stops responding to theco2 &switches to o2 for the drive. Thus co2 rises even more as the body stops response to co2. This makes o2 dangerous to use. Most COPD get no rise in co2. You need a blood test to know.See 1 more doctor answer
Tissues vs. Blood: Hypoxia is low oxygen in the tissues. Hypoxemia is low oxygen in the arterial blood. Hypoxemia caused by low oxygen in air (such as high altitude), low ventilation (slow breathing oversedation), lung disease or blood clots in lung. Low oxygen in arterial blood leads to low oxygen in tissues but hypoxia can also be due to anemia (less oxygen carrying capacity by blood), carbon monoxide poisoning.
Hypoxia, is a condition in which the body as a whole or a region of the body is deprived of adequate oxygen supply. It is classified into 4 groups: - hypoxemic - oxygen is low - anemic - decreased ability for hemoglobin to carry oxygen. - ischemic - decreased blood flow. - histotoxic - oxygen is reaching the cells, but the cells are unable to ...Read more