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NURS 640 Exam 1 Exam Script 2026 Comprehensive Questions and Solutions Graded a+

HEAL100 Health Care — exam and revision material · Other

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Health Care exam material, 6 pages. Originally published on StudyMerit.

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6
Academic year
2025/2026
Language
English

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NURS 640 Exam 1 Students also studied Science Medicine Nursing Save NURS 640 Exam 1 119 terms huda2410 Preview Nurs 640 Exam 4 43 terms huda2410 Preview NURS 640 Exam 2 167 terms tina_gasperine Preview NURS 6 95 terms tina Practice questions for this set Learn 1 / 5 Study with Learn 95-100% SaO2 95-100% PaO2 80-100 PAO2 60-100 A-a gradient PAO2-PaO2 Choose an answer 1 PCO2 2 HCO3 Levels 3 Co2 4 SaO2 Don't know?

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PaO2/FiO2 ratio >300 ABG format pH/PaCO2/PaO2/HCO3/SaO2 Arterial sampling pH: 7.35-7.45 PaCO2: 35-45 PaO2: 80-100 HCO3: 22-26 SaO2: 95 Venous sampling pH: 7.31-7.41 PaCO2: 41-51 PaO2: 35-40 HCO3: 22-26 SaO2: 70-75 Hypoxemia grading scale 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 • 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 • SpO2 < 80% • Movement • Bright light interference • Intravascular interference (ex: dye) • Extravascular interference (ex: polish) • Non-functional hemoglobin • Reduced blood flow Hyperoxemia cannot be detected Respiratory acidosis • CNS depression • Sedation • Chest wall injury • Respiratory obstruction Respiratory alkalosis • Hyperventilation • Anxiety • Pain • Fever • Sepsis • Pregnancy • Severe anemia

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