A ph of less than 7 0 is called acid and a ph higher than 7 0 is called basic alkaline. The aforementioned components all have different normal values and represent different aspects of the blood gas.
The difference expressed as p a a o 2 increases with age cigarette smoking and increasing fio 2.
Abg normal range. According to the national institute of health typical normal values are. The normal range for ph is 7 35 7 45. Arterial blood gases normal values for pao2 the normal value for the partial pressure of arterial oxygen pao2 irrespective of age is greater than 80 mmhg 10 6 kpa mellengard k 1966 sorbini ca et al 1968.
Normal reference range is between 5 to 3. The ph measures hydrogen ions h in blood. Interpreting an arterial blood gas abg is a crucial skill for physicians nurses respiratory therapists.
The base excess indicates the amount of excess or insufficient level of bicarbonate in the system. A normal reference range is 5 15 mmhg. Bicarbonate hco3 22 to 26 milliequivalents per liter meq liter.
The ph of blood is usually between 7 35 and 7 45. A negative base excess indicates a base deficit in the blood a negative base excess is equivalent to an acid excess. Finally bicarbonate ions or hco3 will tell you if the problem is related to metabolic changes in your patient and refers to the renal system berman et al.
Normal is considered to be from 22 to 26 mmol l. The alveolar arterial difference or gradient can be estimated only if the oxygen fraction of inspired air fio 2 usually 0 21 on room air barometric pressure and water vapour pressure are known. Abg value normal results range.
The normal range for paco2is 35 to 45 mmhg. Seated pao2 104mmhg 13 8 kpa 0 27 x age in years. This measures the pressure of co2 dissolved in the blood and how well carbon dioxide has the ability to move out of the body.
Oxygen saturation sao2 95 to 100. Partial pressure of oxygen pao2 75 to 100 millimeters of mercury mmhg partial pressure of carbon dioxide paco2 35 to 45 mmhg. As the ph decreases 7 35 it implies acidosis while if the ph increases 7 45 it implies alkalosis.
The normal pao2 for a given age can be predicted from. In the context of arterial blood gases the most common occurrence will be that of respiratory acidosis. An acidosis or alkalosis may be present even if the ph is in the normal range 7 35 7 45 you will need to check the paco 2 hco 3 and anion gap.
Supine pao2 104 13 8 0 42 x age.