ASSESSMENT OF ACID-BASE BALANCE RT 3025 HYDROGEN ION CONCENTRATION (pH)
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Course
NURS 2539
Institution
Chamberlain College Of Nursing
ASSESSMENT OF ACID-BASE
BALANCE
RT 3025
HYDROGEN ION CONCENTRATION
(pH)
Normal pH: 7.35 - 7.45
pH is measurement of H+ ions in the plasma.
Changes in pH of 1 unit represent a ten fold change in
[H+].
pH [H+] in nanomols/ L
7.6 26
7.5 32
7.4 40
7.3 50
7.2 63
7.1 80
7....
Allbody functions occur optimally around a pH of
7.40.
Acidosis results in depression of the CNS.
Lethargic and disoriented to comatose.
Acidosis reduces cardiac contractility.
Alkalosis results in hyperexcitability of CNS and
peripheral nerves.
muscle spasm.
, PaCO2
Normal value: 35-45 mmHg.
It is the most reliable measurement for evaluating
effectiveness of ventilation.
It is a reflection of the respiratory component of the acid-
base status.
CO2 is a waste product of metabolism; therefore, PaCO 2
identifies degree of ventilation in relation to metabolic
rate.
Fever or exercise increase metabolic rate (CO2
production) leading to hyperventilation (CO2 elimination).
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