arterial blood gas Flashcards
ABG provides information regarding…?
- adequacy of ventilation
- the state of oxygenation
- acid base status
main criteria for site selection
evidence of collateral circulation
-vessel accessibility, palpability and stability
consideration of the proximity of nerves
why is a femoral ABG not recommended >
the femoral artery and vein are adjacent; in the hypotensive pt, it is difficult to asses if the samples is arterial or venous.
direct pointure could release an embolus
is deeper than branchia/radial, apply pressure longer than 10 mins
other five selection of an arterial puncture site
-presence of hematoma
-trauma or near the sire nerve / tendon repair, fractured pelvis and fractured femur
anticoagulant therapy
need to preserve vessel for an AV shunt or fustula for dialysis
can we take blood from the ulnar artery ?
no, this is because of the proximity of the ulnar nerve
the ulnar can provide collateral circulation to the hand
angle ranges for diff ABG site
-wrist/ radial- 45 %
-brachial 60-90%
at least 90& for femoral