Author Question: When an Allen test result is negative, blood for blood gas analysis should be drawn from which of ... (Read 47 times)

ap345 · **on:** Jul 16, 2018

When an Allen test result is negative, blood for blood gas analysis should be drawn from which of the following sites?

a. Earlobe c. Brachial artery
b. Radial artery d. Side of the heel

Question 2

Which of the following events can lead to ventricular fibrillation?

a. A ventricular rate of ninety beats a minute
b. A premature ventricular beat that occurs during the T wave
c. The presence of saw tooth waves instead of P waves on an electrocardiogram
d. An increased width of the QRS complex

T4T · **Reply #1 on:** Jul 16, 2018

Answer to Question 1

ANS: C
Another sampling site, such as the brachial artery, should be chosen if the result of a modified Allen test is negative.

Answer to Question 2

ANS: B
A ventricular rate of ninety beats a minute is within normal limits. A premature ventricular beat during the T wave would be immediately after the relative refractory period and could lead to ventricular tachycardia or ventricular fibrillation. Saw toothed waves instead of P waves indicate that atrial flutter is present. An increased width of the QRS is associated with any ventricular arrhythmia.