Using the Henderson-Hasselbalch equation, determine the accuracy ...

[ts19998]

Using the Henderson-Hasselbalch equation, determine the accuracy of the gas below. To be con-sidered accurate, it must be within 0.03 pH unit. pH = 7.22, PCO2 = 49 mm Hg, HCO3 = 20 mEq/L
 
  a. This gas is completely accurate.
  b. This gas is accurate as the calculated pH is 7.23.
  c. This gas is accurate as the calculated pH is 7.20.
  d. This gas is inaccurate according to the H-H equation.

Question 2

In acute respiratory acidosis, what would you expect the BE range to be?
 
  a. 4 to 6 mEq/L
  b. +2 to 2 mEq/L
  c. +4 to +6 mEq/L
  d. +22 to +26 mEq/L

[cclemon1]

Answer to Question 1

ANS: B
Plugging the ABG values supplied into the H-H equation results in a pH of 7.33 which indicate the gas is accurate as the value should be within 0.03 of the recorded pH.

Answer to Question 2

ANS: B
In cases of acute (uncompensated) respiratory acidosis, the BE commonly would be within the normal range, indicating correctly that the disturbance is purely respiratory in origin.

[ts19998]

Gracias!

[Alyson.hiatt@yahoo.com]

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