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Arterial Blood Gas

Arterial blood gas results are used to assess tissue oxygenation, ventilation and where can i purchase viagra acid-base status. Parameters included in a blood gas are: pH, PO2, PCO2, base excess, and bicarbonate. The Sanz electrode with pH sensitive glass measures the change in hydrogen concentration across the pH sensitive glass membrane. The Severinghaus electrode, which in principle is mexico viagra a pH electrode, measures CO2 tension by allowing the CO2 gas to undergo a chemical reaction to produce hydrogen ions. The Clark electrode measures oxygen by electron consumption. Base excess and bicarbonate are calculated values.

Reference ranges are:

PO2

80 - 100 mm Hg

PCO2

35 - 45 mm Hg

pH

7.35 -7.45

Bicarbonate

21 - 28 mEq/L

Base Excess

+/- 3 mEq/L

 

Traditionally, arterial specimens were collected in glass syringes and placed in an ice slurry f

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