Which size of needle should be used to draw arterial blood from ...

[moongchi]

Which size of needle should be used to draw arterial blood from an adult?
 
  a. 22 gauge c. 26 gauge
  b. 24 gauge d. 28 gauge

Question 2

The purpose of an Allen test is to check blood flow in the _____ artery. 1. ulnar 2. radial 3. brachial 4 posterior tibial 5. lateral plantar
 
  a. 1, 2, and 3 c. 1, 4, and 5
  b. 2, 3, and 4 d. 3, 4, and 5

[stano32]

Answer to Question 1

ANS: B
Blood samples from adult patients should be obtained with 23- to 25-gauge needles.

Answer to Question 2

ANS: C
An Allen test should always be done before a radial artery puncture is performed to ensure that there is collateral circulation in the ulnar artery. An Allen type of test should be performed to en-sure collateral circulation in the posterior tibial and lateral plantar arteries when drawing arterial blood from the dorsal artery of the foot.