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NUR 445 EXAM 2 NEWEST 2025 ACTUAL EXAM
QUESTIONS AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) |ALREADY GRADED A+
what are the 3 components of oxygenation -CORRECT ANS>>pulmonary gas
exchange, oxygen delivery (supply), oxygen consumption (demand)
the moment of gas from an area of higher concentration to lower concentration
affected by pressure gradient surface area thickness -CORRECT ANS>>diffusion
what are the 3 components of pulmary gas exchange -CORRECT ANS>>-
ventilation
- diffusion
-perfusion
the mechanism by which tissues regulate their own blood supply by dilation or
constriction local blood vessels -CORRECT ANS>>auto regulation
what are the 2 carriers of O2 to cells -CORRECT ANS>>1. hemoglobin carries
(97%)
2. plasma carries 3%
how would you assess your patient's O2 delivery status -CORRECT ANS>>CO,
Hgb, SaO2,
SpO2, PaO2
what factors may alter interpretation and accuracy of O2 delivery -CORRECT
ANS>>CO, anemia, vasoconstriction, shock
, 2
how much oxygen the tissues are able to get off the hemoglobin molecule to use
for energy in the body -CORRECT ANS>>oxygen consumptions
what factors lead to increased oxygen consumption -CORRECT
ANS>>hyperventilation, hyperthermia, trauma, sepsis, anxiety, stress,
hyperthyroidism, increased muscle anxiety
what factors lead to decreased oxygen consumption -CORRECT
ANS>>hypoventilation, hypothermia, sedation, neuromuscular blocking agents,
anesthesia, hypothyroidism, inactivity, immobilization
how would you assess how much your patients tissues are demanding oxygen? -
CORRECT ANS>>serum lactate levels, base excess and deficit, and SvO2
this value reflects oxygen extraction by the tissues and the balance between
oxygen supply and demand; the venous saturation of oxygen -CORRECT
ANS>>SvO2
what would cause a decrease in SvO2 (<70%) -CORRECT ANS>>decreased O2
delivery (supply)
increased O2 consumption (demand)
ex: decreased CO from HF, dysrhythmias, drugs, respiratory failure
what would cause an increased SvO2 (>75%) -CORRECT ANS>>increased O2
delivery (supply)
NUR 445 EXAM 2 NEWEST 2025 ACTUAL EXAM
QUESTIONS AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) |ALREADY GRADED A+
what are the 3 components of oxygenation -CORRECT ANS>>pulmonary gas
exchange, oxygen delivery (supply), oxygen consumption (demand)
the moment of gas from an area of higher concentration to lower concentration
affected by pressure gradient surface area thickness -CORRECT ANS>>diffusion
what are the 3 components of pulmary gas exchange -CORRECT ANS>>-
ventilation
- diffusion
-perfusion
the mechanism by which tissues regulate their own blood supply by dilation or
constriction local blood vessels -CORRECT ANS>>auto regulation
what are the 2 carriers of O2 to cells -CORRECT ANS>>1. hemoglobin carries
(97%)
2. plasma carries 3%
how would you assess your patient's O2 delivery status -CORRECT ANS>>CO,
Hgb, SaO2,
SpO2, PaO2
what factors may alter interpretation and accuracy of O2 delivery -CORRECT
ANS>>CO, anemia, vasoconstriction, shock
, 2
how much oxygen the tissues are able to get off the hemoglobin molecule to use
for energy in the body -CORRECT ANS>>oxygen consumptions
what factors lead to increased oxygen consumption -CORRECT
ANS>>hyperventilation, hyperthermia, trauma, sepsis, anxiety, stress,
hyperthyroidism, increased muscle anxiety
what factors lead to decreased oxygen consumption -CORRECT
ANS>>hypoventilation, hypothermia, sedation, neuromuscular blocking agents,
anesthesia, hypothyroidism, inactivity, immobilization
how would you assess how much your patients tissues are demanding oxygen? -
CORRECT ANS>>serum lactate levels, base excess and deficit, and SvO2
this value reflects oxygen extraction by the tissues and the balance between
oxygen supply and demand; the venous saturation of oxygen -CORRECT
ANS>>SvO2
what would cause a decrease in SvO2 (<70%) -CORRECT ANS>>decreased O2
delivery (supply)
increased O2 consumption (demand)
ex: decreased CO from HF, dysrhythmias, drugs, respiratory failure
what would cause an increased SvO2 (>75%) -CORRECT ANS>>increased O2
delivery (supply)
