arterial blood gas

Question 1

ABG provides information regarding…?

Answer 1

• adequacy of ventilation
• the state of oxygenation
• acid base status

Question 2

main criteria for site selection

Answer 2

evidence of collateral circulation
-vessel accessibility, palpability and stability
consideration of the proximity of nerves

Question 3

why is a femoral ABG not recommended >

Answer 3

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

Question 4

other five selection of an arterial puncture site

Answer 4

-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

Question 5

can we take blood from the ulnar artery ?

Answer 5

no, this is because of the proximity of the ulnar nerve

the ulnar can provide collateral circulation to the hand

Question 6

angle ranges for diff ABG site

Answer 6

-wrist/ radial- 45 %
-brachial 60-90%
at least 90& for femoral