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NURS 640 TEST BANK 2026 EXAM REVIEW WITH SOLVED QUESTIONS GRADED A+

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NURS 640 TEST BANK 2026 EXAM REVIEW WITH SOLVED QUESTIONS GRADED A+

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NURS 640 TEST BANK 2026 EXAM REVIEW
WITH SOLVED QUESTIONS GRADED A+


◉ PaO2. Answer: 80-100


◉ PAO2. Answer: 60-100


◉ A-a gradient. Answer: PAO2-PaO2


◉ PaO2/FiO2 ratio. Answer: >300


◉ ABG format. Answer: pH/PaCO2/PaO2/HCO3/SaO2


◉ Arterial sampling. Answer: pH: 7.35-7.45
PaCO2: 35-45
PaO2: 80-100
HCO3: 22-26
SaO2: 95


◉ Venous sampling. Answer: pH: 7.31-7.41

, PaCO2: 41-51
PaO2: 35-40
HCO3: 22-26
SaO2: 70-75


◉ Hypoxemia grading scale. Answer: None: PaO2 >80 SpO2 >95
Mild: PaO2 60-79 SpO2 90-94
Moderate: PaO2 40-59 SpO2 75-89
Severe: PaO2 <40 SpO2<75


◉ Pulse Oximetry Indications. Answer: •Written as SpO2
•Non-invasive monitoring used in situations where when hypoxemia can
occur
•Represents the amount of oxygen bound to functional hemoglobin
•Used as surrogate to estimate PaO2 non-invasively, however limitations
to pulse oximetry impact pulse oximetry accuracy
•When ischemia / severe anemia occurs, it does not accurately represent
oxygen delivery to tissues


◉ Pulse Oximetry limitations. Answer: • SpO2 < 80%
• Movement
• Bright light interference
• Intravascular interference (ex: dye)

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