If a patient s ph 7 45 the patient is in alkalosis. How to interpret an abg.
Note that the hco3 is raised in this patient despite the abnormal ph.
Abnormal abg test results. Metabolic problems will require respiratory compensation and this occurs rapidly eg by increasing ventilation to blow off co 2 on the other hand respiratory problems leading to acid base abnormalities. You must be careful in interpreting your results many test results depend on specific age and body condition as the normal values for your child isn t normal for your results as an adult and the pregnant women have normal levels different from those for non pregnant women. This would indicate that the patient normally retains co2 and has a chronically raised hco3.
See abg interpretation for more details. Arterial blood gas abg interpretation for medical students osces and mrcp paces this section presents how to interpret arterial blood gases. If you have started displaying some of the symptoms listed above then you need to consult with your physician right away.
It explains each component in turn followed by clinical examples to work through. The first value a nurse should look at is the ph to determine if the patient is in the normal range above or below. Blood ph has to be maintained within a tight normal range to avoid cellular death.
Investigations such as arterial blood gases. In acute heart failure ahf patients pulmonary oedema and low tissue perfusion may lead to changes in the acid base balance which may be associated with worse outcomes. The most important points when assessing a patient are the history examination and basic observations.
This is type 2 respiratory failure. If the ph 7 35 then the patient is acidosis remember the lower the ph number the higher the acid level in the body. The ph of arterial blood should be between 7 35 and 7 45.
Normal and abnormal ranges can vary depending on the lab because some use different. As a result your body fluids may become too acidic or too alkaline and less able to effectively support normal functioning. Interference factors on the meaning of test results.
In this prospective nationwide cohort study from 24 academic hospitals arterial blood gas abg was measured in 1982 ahf patients at hospital admission. Significant alterations in ph can indicate life threatening problems that must be treated rapidly. 7 abnormal blood test results with wrong reference ranges.
An abnormal result basically means that your body is out of acid base balance. An abg looks at five different components of arterial blood. This can be achieved by buffer mechanisms which can be either renal or respiratory in nature.
Abnormal results can be signs of certain medical conditions including the ones in the following table. With the above history this is likely to represent an acute on chronic respiratory acidosis. Your doctor would conduct a brief physical examination review your medical history and order a blood gas analysis abg test to check and review the current oxygen carbon dioxide absorption rate as well as to assess if the current imbalances are indicative of serious.