ABG help

[phimusister]

Hi! I have been working on ABG practice problems and think I have it all down... except these three questions...Can anyone help me with these/ explain? Thanks so much for your help!!

What is the mechanism by which CO2 is formed in the human body?

a) By-product of plasma protein degradation

b) By-product of inadequate tissue perfusion

c) By-product of normal metabolic processes

d) By-product of insufficient hemoglobin

The renal systen resolve respiratory induced acidosis by?

a) Excretion of fewer hydrogen ions in the form of fixed acids

b) Excretion of additional CO2 in the form of fixed acids

c) Reabsorption of additional bicarbonate from urine filtration

d) Reabsorption of additional hydrogen ions from urine filtration

The source of atmospheric or barometric pressure is...

a) Air currents in the atmosphere

b) Electrical charges associated with ions in the atmosphere

c) Chemical attraction of gas molecules for one another in the atmosphere

d) Random movement and collision of gas molecues in the atmosphere

[2ndyearstudent, CNA]

Hi! I have been working on ABG practice problems and think I have it all down...

I suspect you know the acronym ROME well and don't have the basics down very well. Your text should have the answers to these questions. The last one might be a little bit tricky but the other two are very basic knowledge.

[birthrevolution]

The first one, if you don't know the answer you should go back and review basic physiology.

The second one, like the previous poster said, you would know the answer to if you understood the basics. The answer is the basis of metabolic compensation for respiratory acidosis.

The third, I don't know how that relates to ABGs...and I just studied this today, oh well.

[2ndyearstudent, CNA]

The third, I don't know how that relates to ABGs...and I just studied this today, oh well.

The third is related to ventilation.

[GilaRRT]

The first one, if you don't know the answer you should go back and review basic physiology.

The second one, like the previous poster said, you would know the answer to if you understood the basics. The answer is the basis of metabolic compensation for respiratory acidosis.

The third, I don't know how that relates to ABGs...and I just studied this today, oh well.

Since any pressure is in essence force applied to unit area, we simply have to understand what creates this force. In the case of gas molecules, a hint would be related to the kinetic energy of said molecules. This relates to ABG's in several ways. Clearly, without a pressure gradient the movement of gas in and out of our body would be impossible.

[Future RN- June '11]

1. by-product of normal metabolic processes. when glucose is metabolised under aerobic conditions, it breaks down into carbon dioxide and water.

2. reabsorption of bicarbonate from urine filtration (kidneys hold onto more bicarbonate to try and balance out the hydrogen ions).

Hope this helps :)