DPT-772: ABG LECTURE EXAM QUESTIONS AND ANSWERS VERIFIED LATEST UPDATE 2024

DPT-772: ABG LECTURE EXAM QUESTIONS AND ANSWERS

VERIFIED LATEST UPDATE 2024

What are two of the many functions of the blood

Transportation of gasses

Homeostasis

Transportation of gasses

O2 to the tissues

CO2 from the tissues

Homeostasis

Control pH

Atmospheric Air

78% nitrogen

21% oxygen

1% argon and misc

At sea level, Patm is

760 mmHg

760 mmHg is the

Total pressure of all combined gasses

Partial pressures

Oxygen is .21 x 760 = 160 mmHg

, Nitrogen is .78 x 760 = 593 mmHg



Remainder is .01 x 760 = 7 mmHg

Fraction of Inspired Air FiO2

% of O2 in the atmosphere being breathed in

Since room air (RA) is 21%, the FiO2 of RA is

0.21

If a patient is given supplemental O2 to breath in, the FiO2 is

increased

If this extra oxygen increases the % of air to be 30% O2, then we would say the

FiO2 is

0.30

Oxygen is delivered to the patient by

nasal cannula, mask or tube.

Low flow oxygen is prescribed as a

flow rate of 0.5 L/min - 5 L/min

For every 1 L/min of supplemental O2 , the FiO2 increases

by .03 (3%)

High flow O2 is prescribed by the

FiO2 (%) and flow (L/min)

For every increase in FiO2 of 0.10, the PaO2 increases by

roughly 50 mmHg

O2 is given at a