ABG Changes In Cardiac Arrest And CPR The Degree

ABG Changes In Cardiac Arrest And CPR The Degree

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ABG changes in Cardiac Arrest and CPR
The degree of acid-base abnormality during cardiac arrest and CPR is
dependent on a number of variables which include:
(1) cause of arrest
(2) duration of arrest when ABG is taken
(3) the quality of the CPR and ventilation the patient is receiving
(4) temperature of the patient when ABG taken
(5) drugs administered during arrest (ie. Adrenaline and NaHCO3)
METABOLIC ACIDAEMIA
- lactic acidosis from hypoperfusion (Type A)
RESPIRATORY ACIDAEMIA
- often may be inadequately ventilated (especially if not intubated)
LOW HCO3-
- from combined metabolic and respiratory acidosis
LOW PaO2
- if patient only receiving air (FiO2 0.21)
NEGATIVE BASE EXCESS
- quantifying degree of metabolic acidosis
HYPERKALAEMIA
- from cell death and loss of cell membrane integrity and acidosis
HYPERGLYCAEMIA
- stress response
Jeremy Fernando (2010)