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ABG 302 FINAL EXAM NEWEST
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ABG 302 FINAL EXAM NEWEST
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ABG 302 FINAL EXAM NEWEST 2024 ACTUAL EXAMCOMPLETE 200 QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED A+
How is the vast majority of oxygen carried in the blood? - ANSWER: chemically
combined with Hb
Under normal physiologic circumstances, how many milliliters of oxygen are capable
of combining with 1 g of Hb? - ANSWER: 1.340 ml
A patient has a P50 value of 29 mm Hg. What does this indicate? - ANSWER:
decreased affinity of Hb for oxygen
Hypoxia is best defined as a condition in which what occurs? - ANSWER: Tissue
oxygen delivery is inadequate to meet cellular needs.
Which of the following conditions must exist for gas to move between the alveolus
and pulmonary capillary? - ANSWER: difference in partial pressures (pressure
gradient)
The time available for diffusion in the lung is mainly a function of which of the
following? - ANSWER: rate of pulmonary blood flow
Metabolic acidosis is best described as ____. - ANSWER: uncorrected low pH caused
by a decrease in HCO3
Metabolic alkalosis is best described as ____. - ANSWER: uncorrected high blood pH
caused by an increase in HCO3
According to Shapiro, a PaO2 value of 50 mm Hg represents ____. - ANSWER:
moderate hypoxemia
Compensation for metabolic acidosis occurs through which of the following? -
ANSWER: decrease in blood CO2 levels
The primary goal of acid-base homeostasis is to maintain which of the following? -
ANSWER: normal pH
A PaO2 below what value would be considered severe hypoxemia? - ANSWER: 40
mm Hg
What is the calculation for PaO2 based on age? - ANSWER: PaO2 ≈ 110 - 1/2 patient's
age
, Acid excretion is shared by which of the following organ systems? - ANSWER: kidneys
& lungs
A decrease in the H+ ion concentration [H+] of the blood caused by a low PaCO2 best
describes which of the following? - ANSWER: respiratory alkalosis
An ABG result shows pH of 7.35, PaCO2 of 30 mm Hg, and HCO3⁻ of 18 mEq/L. Which
of the following is the patient's most likely primary disorder? - ANSWER: metabolic
acidosis
pH = 7.01
PCO2 = 71 mm Hg
HCO3⁻ = 16.3 mEq/L - ANSWER: combined respiratory and metabolic acidosis
pH = 7.38
PCO2 = 21 mm Hg
HCO3⁻ = 11.7 mEq/L - ANSWER: fully compensated metabolic acidosis
If the blood PCO2 is high, the kidneys will do which of the following? - ANSWER:
excrete more H+ and reabsorb more HCO 3-
The numerator of the Henderson-Hasselbalch (H-H) equation (HCO3⁻) relates to
which of the following? - ANSWER: renal buffering
excretion of fixed acids
What are some causes of metabolic acidosis with an increased anion gap? -
ANSWER: ketoacidosis
lactic acidosis
renal failure
What is the main compensatory mechanism for metabolic acidosis? - ANSWER:
hyperventilation
In order to assess the events occurring at the tissue level, especially tissue
oxygenation, what parameter would you sample and measure? - ANSWER: systemic
mixed venous blood
A patient has a whole body oxygen consumption of 320 ml/min and a measured
CaO2- CvO2 of 8 ml/dl. What is the cardia output? - ANSWER: 40 L/min
Compensation for metabolic acidosis occurs through...? - ANSWER: decrease in
blood CO2 levels
What is the Arterial Oxygen Content Equation? - ANSWER: CaO2 (mL O2/dL) =
(1.34 x Hb concentration x SaO2) + (0.0031 x PaO2)
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