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BLOOD GASES

Synonym(s):

Lab Section Category

Description

Indications

Specimen Required

3 mL arterial blood in heparinised sealed syringe immersed in crushed ice.

Precaution:
Ensure that there is no air space in the syringe and air bubbles present in the syringe are expelled. Tightly seal the syringe nozzle to avoid exposing collected blood to air.
The syringe should be gently rotated between the palms of the hands to ensure good mix of blood and heparin.
The specimen should then be clearly labelled, placed in a biohazard bag and immersed in another bag with crushed ice and despatched immediately to the laboratory.

Storage and Transport

​Keep cold with ice and send immediately to the laboratory.

Method

​Electrochemistry

Test Results

Reference Interval / Value

​From 0 day
pH : 7.350 - 7.450

pCO2 : 35.0 - 45.0 mmHg

pO2 : 75.0 - 100 mmHg

BE : -2.0 - 2.0 mmol/L

O2 Sat : 95.0 - 100.0%

Std Bicarb. : 21.0 - 27.0 mmol/L

Turnaround Time

​Mean = 4 hrs, Range: 3 – 5 hrs

Day(s) Test Set up

​Daily, 24 hrs STAT

Remarks

Change History Notes

Others

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