Top
20
Doctor insights on: Hypoxia And Hypercapnia

Share

Hypercapnia (Definition)

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


2

2
What is the ventilatory response to hypoxia and hypercapnia?

What is the ventilatory response to hypoxia and hypercapnia?

Increase ventilation: The basic answer to this question is that the body increases ventilation in response to hypercapnia or hypoxia. There are both environmental and individual causes that account for variability amongst individuals in their responses to these stimuli.

3

3
What is the blood gas value to determine hypercapnia & hypoxia?

What is the blood gas value to determine hypercapnia & hypoxia?

See below: Hypercapnea or hypercarbia-too much carbon dioxide is measured by the pco2 in a blood gas (elevated). Hypoxia is a lack of oxygen in the blood and measured by the po2 (low).

4

4
What would be the feeling of hypercapnia?

What would be the feeling of hypercapnia?

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).

5

5
How to treat hypercapnia?

Cause: Depends on the cause. If it is compensatory for metabolic alcolosis or hypo ventilation due to pleural effusion or something else. The physician at the bed side is the best guide.

6

6
What is the definition or description of: hypercapnia?

What is the definition or description of: hypercapnia?

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.

7

7
Does hypercapnia help accelerate your blood flow?

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.

8

8
What can cause hypercapnia but with normal oxygen levels so no hyperventilation etc?

What can cause hypercapnia but with normal oxygen levels so no hyperventilation etc?

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.

9

9
Can emphysema cause hypercapnia?

Can emphysema cause hypercapnia?

Yes: Hypercapnea is more common with COPD than with emphysema and many patients have a mixture of COPD and emphysema but I have seen a few cases of hypercapnia where emphysema was the primary issue.

10

10
Why do patients with chronic bronchitis develop hypercapnia?

Why do patients with chronic bronchitis develop hypercapnia?

Emphysema: Chronic bronchitis is associated with emphysema which reduces gas exchange in the lungs leading to carbon dioxide retention and lower oxygen level. I trust you are under the care of a pulmonologist.

See 2 more doctor answers
11

11
Can hypercapnia cause brain damage to a baby?

Can hypercapnia cause brain damage to a baby?

Hypercapnia...: ...Is usually accompanied by hypoxia, and of the two it is the hypoxia that does most of the damage.

12

12
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?

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?

13

13
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

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

15

15
Why does airway obstruction in chronic lung disease lead to hypercapnia?

Why does airway obstruction in chronic lung disease lead to hypercapnia?

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
16

16
What is hypobaric hypoxia?

What is hypobaric hypoxia?

Hypoxia: Low atmospheric pressure leading to low oxygen in body.

See 2 more doctor answers
17

17
What are hypoxia and asphyxia?

What are hypoxia and asphyxia?

See below: Hypoxia is a lack of oxygen in the bloodstream. Asphyxia, or suffocation, is the consequence of hypoxia.

18

18
What is hypoxia versus ischemia?

What is hypoxia versus ischemia?

Hypoxia is: Referring to low oxygenation levels globally in the body whereas ischemia refers to low oxygen levels in localized tissue.

19

19
Explain hypoxia vs hypoxemia?

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.

20

20
Why is there cyanosis during hypoxia?

Low oxygen: Cooling slows down metabolic process of circulatory system and oxygen levels fall.

Dr. Daniel Saurborn
234 Doctors shared insights

Hypoxia (Definition)

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