Arterial blood gas normal values pdf

When interpreting arterial blood gas abg results, it is essential to know what abg values are considered normal. Interpreting an arterial blood gas abg is a crucial skill for physicians, nurses. Arterial blood gases po 2 so 2 measured calculated pulse oximetry pco 2 ph bebd hco 3venous co 2 oxygenation ventilation acidbase. Arterial blood gases abgs are measured in a laboratory test to determine the extent of compensation by the buffer system. The normal hemoglobin hgb value for men is 1418 gmdl, and for. An arterial blood gas abg test measures the acidity ph and levels of oxygen and carbon dioxide in the blood. Maier md, msph, in murray and nadels textbook of respiratory medicine sixth edition, 2016. The measurement of arterial blood gas tensions and oxygen saturation so 2 is a cornerstone in the evaluation of pulmonary disease severity. Arterialised capillary samples are comparable to arterial blood table i. Analysis of arterial blood gases a comprehensive approach. Resting arterial p o 2 does not correlate with exercise capacity.

Arterial blood gas sampling society for acute medicine. Abg results may indicate decreased o2 levels hypoxia, decreased or increased co2 levels hypo or hypercapnia, acidosis decreased ph. Normal values for arterial blood gas abg normal values are given below. The alveolar ventilation is that portion of total ventilation that participates in gas exchange with pulmonary blood. If the co2 is higher than this expected value this suggests inadequate. The measurement of arterial blood gas tensions and oxygen saturation s o 2 is a cornerstone in the evaluation of pulmonary disease severity. Pdf blood gas analysis for bedside diagnosis researchgate. Acid base balance university hospitals bristol nhs. Anion gap this value is used in metablic acidosis to find the cause. Discuss arterial blood gas values and their implications to patient management. These ranges vary from lab to lab and depend upon the elevation above sea level.

Reference values for arterial blood gases should be based on subjects representative of the general healthy population. Abg parameters, reference range and alert values reported by the authors lab. An acceptable normal range of abg values of abg components are the following,56 noting that the range of normal values may vary among. Abgs provide information about acidbase balance and the levels of o2 and co2 in the blood. An abg test requires that a small volume of blood be drawn from the radial artery with a syringe and a thin needle, but sometimes the femoral artery in the groin or another site is used. It measures the acidity ph and the levels of oxygen and carbon dioxide in arterial blood. Chemistry test value comments bicarbonate total co2 40 mmoll bilirubin, total 15 mgdl. You cant fully compensate metabolic alkalosis you can only hypoventilate a bit nb.

Interpreting abgs arterial blood gases made easy ausmed. Correlation of arterial blood gas measurements with venous. As a result, arterial hypoxemia at rest is, by itself, not evidence of severe. Reference values for arterial blood gases in the elderly. Note that these may vary slightly between analysers. Veterinary normal values blood gas canine feline arterial venous arterial venous ph 7. Unlike other blood tests, which are either high or low, abgs present the doctor with six numbers that need to be interpreted as one result. Arterial blood gas analysis is not used for impairment rating purposes on a routine basis. This often confusing number on the abg tells us how much alkaline base one would. The normal values listed herecalled a reference rangeare just a guide.

The blood can also be drawn from an arterial catheter. Your lab may have a different range for whats normal. Some blood gas analyzers also measure the methemoglobin, carboxyhemoglobin, and hemoglobin levels. Arterial blood gases abgs lab and diagnostic procedure. Arterial blood gases abgs critical lab values medical. Partial compensation ph not quite back to normal yet. If capillary sample 100150 micro l is being taken from prewarmed heel, let the capillary fill from the tissue site from where blood is oozing out figure i. Pointofcare blood gas analyzers facilitate analyzing of the blood sample near the bedside and especially in the delivery room, which can accelerate clinical decision making versus the hospital central laboratory. Pdf arterial blood gas is an important routine investigation to monitor the acid base. An arterialblood gas abg test measures the amounts of arterial gases, such as oxygen and carbon dioxide.