The maximum amount of blood that should be discarded from the ...

[tuffie]

The maximum amount of blood that should be discarded from the indwelling arterial catheter of an infant is ____ mL.
 
  a. 0.3 c. 0.8
  b. 0.5 d. 1.0

Question 2

Which is the correct sequence of events when one is obtaining arterial blood from the radial ar-tery of a patient?
 
  1. Perform the modified Allen test.
  2. Remove any air bubbles from the sample.
  3. Apply direct pressure to the puncture site.
  4. Clean the puncture site with a suitable antiseptic solution.
  5. Use a 23-gauge needle and a plastic syringe containing an anticoagulant.
  a. 1, 4, 3, 5, 2 c. 1, 4, 5, 3, 2
  b. 4, 1, 5, 2, 3 d. 1, 5, 2, 4, 3

[frankwu0507]

Answer to Question 1

ANS: B
The discarded volume for an infant is typically only approximately 0.2 to 0.5 mL.

Answer to Question 2

ANS: C
Collateral circulation must be ensured before the puncture by performing a modified Allen test. After the test shows sufficient collateral circulation, the site should be prepared for the puncture by cleaning with a suitable antiseptic solution. Blood samples should be obtained with a small-gauge needle (i.e., 23 to 25 gauge). After blood has been withdrawn and the needle re-moved, direct pressure should be applied to the puncture site to prevent the formation of a he-matoma. Air bubbles should then be removed because their presence can produce erroneous measurements.

[tuffie]

Gracias!

[bdobbins]

TYSM