2. Acid base status
Degree of oxygenation of blood and
adequacy of alveolar ventilation
Continous arterial blood pressure
monitoring in an emergency
3. 1ml or 2 ml disposable syringe
20 gauge disposable needles
Heparin1;1000
Alcohol swab disposable gloves
Arterial catheter for continous pressure
monitoring
Tegaderm
4. Identify patient by name and explain
procedure
Temperature
Heparinize 2 ml syringe
Wash hands wear gloves
Palpate the radial,brachial or femoral artery
6. palpate for maximum pulsation
at 45-60 degreee angle
once the artery is punctured ,arterial pressure
will push up the piston of the syringe and a
pulsating flow of blood will fill the syringe.
7. apply firm pressure -for 5 mins.
air is removed and cap the syringe needle
and keep it in a container of ice.
8. Arterial blood gas analysis
is an essential part of diagnosing and
managing a patient’s oxygenation status and
acid-base balance
9. pH = Pka + log base/acid
Acidemia – H+ conc in plasma is greater than
normal
Alkalemia – H + conc in plasma is less than
normal
10. Excess heparin : low pH, PCO2 & HCO3
Contamination with room air : PaO2,
pH, PaCO2
Delayed analysis :
By 10 mts – pH decreases by 0.01
PCO2 increases by 1 mmHg
O2 conc decreases by 0.001