arterial blood gas Flashcards

1
Q

ABG provides information regarding…?

A
  • adequacy of ventilation
  • the state of oxygenation
  • acid base status
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2
Q

main criteria for site selection

A

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

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3
Q

why is a femoral ABG not recommended >

A

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

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4
Q

other five selection of an arterial puncture site

A

-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

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5
Q

can we take blood from the ulnar artery ?

A

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

the ulnar can provide collateral circulation to the hand

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6
Q

angle ranges for diff ABG site

A

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

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