Doctor insights on:
Arterial Blood Gas Test Questions
Difficult: Interpreting blood gas results requires a thorough knowledge of respiratory physiology, metabolic alterations, changes due to body making compensation for the abnormalities and effect of various interventions. Arterial blood gas results is not something to be interpreted by a lay person. ...Read more
Arteries are defined as blood vessels which carry blood away from the heart (to either the body or lungs). Arteries: higher pressure, thicker walls, stretch (pulse) with each heart contraction & deliver blood to the arterioles which control the flow to individual capillaries. Veins are blood vessels which carry blood from capillaries back to the heart (body to right heart; ...Read more
Yes: As the name implies, an arterial blood gas is when they check your gas levels (oxygen and carbon dioxide) from the blood in your arteries. Therefore, you must be stuck with a needle in your artery (usually the radial artery for an adult). The only time you wouldn't be stuck for it is if you already have a special IV line (arterial line) in place - but then you're most likely in the icu. ...Read more
To avoid ischemia: Allen test is done to ensure that dual arterial blood supply to the hand is intact. If both and radial and ulner arteries are not intact and if the remaining artery is damaged it could disable the hand, therefore allen test is essential to ensure adequate blood supply to the hand in case of injury to the artery from which blood may be drawn. ...Read more
Blood oxygen test.: An abg is a test that measures the oxygen tension, carbon dioxide, and acidity (ph) of blood taken from an artery. It is used to determine how well the blood is being oxygenated and how well gas exchange is occuring. This information is vital when caring for patients with critical illness or respiratory disease. ...Read more
See below: Here are the "ideal" values. However, it all depends on the situation and the relationships between the numbers (i.e. Is the body compensating appropriately for the situation). Ph: 7.35-7.45, po2 80-120, pco2 38-42, hco3 22-28. ...Read more
Mearsurment: THe sampling of blood from an artery gives the tester a clue as to how much oxygen your cells are carrying, the level of Co2 to see if respiration and acid base balance is in check. ABG is often performed during asthma to see the pulmonary status and whn one is on a ventilatr to breathe. It can ensure the ventilator is producing enough ventialtion ...Read more
I am not sure what context you are asking about. The questions is very ambiguous. What specifically prompts this question?
But, blood gases tell the medical team how well the oxygen and carbon dioxide balance is being maintained in the body. It can tell how the fragile balance of being acidic or basic is in a sick person. It is used in many instances in the hospital with very ill patients. ...Read more
A bit: Arteries are more muscular than veins and have a higher pressure inside. The arterial stick is not much different than a venous blood draw but it has to be held with pressure plus have a pressure dressing afterward. ...Read more
Measure CO level: An arterial blood gas measures the blood pH (normal 7.40), po2 (partial pressure of oxygen), pco2, partial pressure of co2 and the bicarbonate (sodium bicarbonate) level is calculated. Smoking increases carboxyhemoglobin level with carbon monoxide binding to the hemoglobin displacing oxygen. The po2 is unaffected by carbon monoxide but the hemoglobin delivers carbon monoxide (a poison) to tissues instead of oxygen. ...Read more
Breath rate increase: O2 deprivation will typically cause people to breath faster. Abg measures levels of oxygen, carbon dioxide and blood ph. Faster breathing causes a drop in co2 which then causes the blood to have an increase in ph (towards basic, not acidic). Over time, the body would compensate for this ph change via acid retention by the kidney and although the co2 would remain low, the ph would approach normal. ...Read more
Difficult delivery: These tests are used to help predict how difficult the delivery was for the baby. Any difficult delivery will often have cord gases taken; if baby is showing signs of distress, then an arterial blood gas from baby may be taken as well. ...Read more
Less O2 delivery: High o2 affinity HGB (leftward shift in o2 saturation curve) means it requires a higher partial pressure of o2 to achieve the same o2 saturation. The HGB is more tightly bound to o2 and less is delivered to the tissues. More o2 will be necessary to adequately deliver oxygen to the tissues. ...Read more
Several: Reasons to check abg. These include checking for oxygen levels to make sure individual has adequate level of oxygen. Co2 levels are checked to rule out co2 retention as that can occur in patients with chronic obstructive pulmonary disease. Also ph levels are checked in abg to make sure that body metabolism is functioning properly. ...Read more
I had an arterial blood gas drawn today and now my wrist is really swollen. It only hurts a little. Is this normal or cause for concern?
its difficult to tell without seeing you, the main concern is that blood leaks enough to cause compression on the nerved and blood supply to the hand.
the important things to look at in the speed of progress of the swelling, or development of pain, pain on passive stretch of muscles in the hand.
I suggest urgent medical review ...Read more
In theory it can happen but 90.99% it does not happen. Unless there is accidental injection of air into the blood vessel
Arterial blood gas showed my pO2 was HIGH at 103. How is this possible? I'm not on oxygen therapy or anything like that. I was breathing normally.
High PO2 level: It is important to know the rest of the blood gas test results. pH? pCO2? Bicarbonate? Your doctor can put it all in perspective for you. What was the O2 sat? If low, it might point to a methemoglobinemia, perhaps from some meds you take. Best to discuss the entire blood gas study with your provider. Normal PO2 shouldn't be above 102. . ...Read more
I had an arterial blood gas sample about 9 days ago. I still have a large bruise on my wrist over the artery where the sample was collected. normal?
Next time some else: The next you need to get blood drawn have a different phlebotomist draw it and after it is drawn and you are given a cotton pad to hold over the insertion site hold it there FIRMLY for 10 minutes! Good luck. This is a bloody business you know! ...Read more
Arterial blood gas results: PH- 7.431, pCO2- 40.1, HCO3- 26.1, BE- 1.7. Are these normal or elevated? Could this cause Ventricular tachycardia?
Normal blood gas ABG: The result you've provided so far seem within the reference range for most blood gas machines - so, "average". One result you didn't list is the pO2, which is a measure of the oxygen content of arterial blood. A low pO2 can cause ventricular tachycardia (VT); however, I suspect the ABG was used as part of a wider panel of tests to help determine cause of VT. Talk to the doctor who ordered the test ...Read more
I have generalized t/c seizures and am having trouble breathing. Should I request a arterial blood gases test from my doctor?
Trouble breathing: You should probably call your doctor as soon as possible if you are having trouble breathing, or go to the ER. Arterial blood gases may or may not be indicated after you have been evaluated. ...Read more