Author Question: Capillary blood gas samples should not be used to measure which of the following? 1. Partial ... (Read 34 times)

Zulu123 · **on:** Jul 16, 2018

Capillary blood gas samples should not be used to measure which of the following?

1. Partial pressure of arterial carbon dioxide (PaCO2)
2. Partial pressure of arterial oxygen (PaO2)
3. pH
4. Hemoximetry oxygen saturation (SaO2)
a. 1 and 3 c. 1 and 4
b. 2 and 4 d. 1 and 2

Question 2

Which is the correct order of steps to perform the modified Allen test?

1. Pressure is applied to both the radial and ulnar arteries.
2. The fist is opened but not fully extended.
3. Pressure on the ulnar artery is removed.
4. The hand is clenched into a tight fist.
5. The palm and fingers are blanched.
a. 4, 1, 2, 5, 3 c. 1, 4, 3, 2, 5
b. 4, 5, 1, 3, 2 d. 4, 2, 1, 3, 5

sailorcrescent · **Reply #1 on:** Jul 16, 2018

Answer to Question 1

ANS: C
The correlation between capillary and arterial pH and partial pressure of carbon dioxide (PCO2) measurements is better than the correlation between capillary and arterial partial pressure of oxy-gen (PO2) measurements. Consequently, capillary blood gases are more often used to discern ac-id-base balance rather than to assess a patient's oxygenation status.

Answer to Question 2

ANS: A
The order for the modified Allen test is as follows: (1) the hand is clenched into a tight fist; (2) pressure is applied to both the radial and ulnar arteries; (3) the hand is opened but not fully ex-tended; (4) the palm and fingers are blanched; and (5) pressure on the ulnar artery is re-movedthis should result in flushing of the entire hand.