Interpreting an arterial blood gas abg is a crucial skill for physicians nurses respiratory therapists and other health care personnel. The first value is the ph which measures how many hydrogen ions h are in the sample.
If the ph 7 35 then the patient is acidosis remember the lower the ph number the higher the acid level in the body.
Abg reading interpretation. Arterial blood gas abg interpretation for medical students osces and mrcp paces this section presents how to interpret arterial blood gases. The real value of an abg comes from its ability to provide a near immediate reflection of the physiology of your patient allowing you to recognise and treat pathology more rapidly. The first value a nurse should look at is the ph to determine if the patient is in the normal range above or below.
When interpreting abg results it is essential to know what abg values are considered normal. It explains each component in turn followed by clinical examples to work through. From this baseline you can then begin to recognise significant variations in a patient s results which could indicate clinical deterioration.
Investigations such as arterial blood gases. How to interpret an abg. The following six step process helps ensure a complete interpretation of every abg.
If a patient s ph 7 45 the patient is in alkalosis. The most important points when assessing a patient are the history examination and basic observations. Abg interpretation is especially important in critically ill patients.
We ve created this guide which aims to provide a structured approach to abg interpretation whilst also increasing your understanding of each result s relevance.