Author Question: What is the approximate normal CaO2 CO2 in a healthy adult at rest? a. 5 ml/dl b. 15 ml/dl c. ... (Read 48 times)

vicky · **on:** Jul 16, 2018

What is the approximate normal CaO2 CO2 in a healthy adult at rest?

a. 5 ml/dl
b. 15 ml/dl
c. 20 ml/dl
d. 250 ml/dl

Question 2

Given the following blood parameters, compute the total O2 content (dissolved + HbO2) of the blood in ml/dl: Hb = 16; PO2 = 625 Hg; SO2 = 100.

a. 17.8 ml/dl
b. 19.4 ml/dl
c. 21.4 ml/dl
d. 23.3 ml/dl

yotaSR5 · **Reply #1 on:** Jul 16, 2018

Answer to Question 1

ANS: A
As indicated in Table 12-2, the difference between the normal arterial and venous O2 contents is approximately 5 ml/dl.

Answer to Question 2

ANS: D
The respiratory therapist obtains a sample of arterial blood from a patient breathing 100 O2. The PO2 is 625 mm Hg, Hb is 16 g/dl, and the O2 saturation is 100. To compute the total O2 con-tent, the respiratory therapist should apply the aforementioned equation as follows:
CaO2 = (0.003 PaO2) + (Hbtot 1.34 SaO2)
CaO2 = (0.003 ml 625 mm Hg) + (16 g/dl 1.34 1.0)
CaO2 = (1.875 ml) + (21.44 g/dl)
CaO2 = 23.3 ml/dl