Hi, according to what I've read about the journal of Singh et. al (2013) entitled "Blood gas analysis for bedside diagnosis", an exact diagnosis cannot be made based on blood gas analysis. Also a patient with asthma could have readings that are comparable to those of a patient with pneumonia. Another thing, the analysis does not take into account how much a patient is truly affected by an anomaly. Lastly, an early pulmonary disease screening test cannot be performed using blood gas analysis.

The accuracy of blood gas analysis is to a large extent influenced by other factors such as cardiac output and others.

Frequent sampling errors like presence of air bubbles in the specimen, delay in analysis exceeding 30 minutes, and inadequate mixing resulting in clot formation may give erroneous readings.

Needs to be done asap.

Delay will distorts the result

Frequent error appears if patient is hypothermic.

Agree for the above , Also ,if sample was not adequately transfer to the lab before the test