CNUR 103 COMPREHENSIVE STUDY
GUIDE WITH ANSWERS
◉ When must respirations be counted for a full minute?
Answer: If breathing is abnormal.
◉ What positions suggest respiratory distress?
Answer: Tripod or orthopneic.
◉ What does pulse oximetry measure?
Answer: Oxygen saturation (SpO₂).
◉ What physical signs indicate hypoxia?
Answer: Cyanosis of lips/nails and delayed capillary refill.
◉ How long may stabilization take after applying O₂?
Answer: 5-10 minutes
◉ What must be documented after oxygen application?
Answer: Assessment, intervention, patient response, teaching
provided.
◉ What defines low-flow oxygen devices?
, Answer: Set flow rate (LPM), variable FiO₂ depending on
breathing pattern.Used for low-moderate oxygen support.Do NOT
guarantee exact FiO₂.
◉ Nasal prongs (nasal cannula) - flow rate + FiO2
Answer: 1-6 LPM → 24-40% FiO₂
◉ when add humidity
Answer: more than 4 LPM
◉ Main disadvantages of nasal prongs?
Answer: Variable FiO₂, nasal dryness, skin irritation, dislodges
easily.
◉ Main advantages of nasal prongs?
Answer: Comfortable, allows eating/talking, inexpensive.
◉ Simple mask - flow rate + FiO2
Answer: 5-10 LPM → 35-50% FiO₂.
◉ Why minimum 5 LPM for simple mask?
Answer: Prevent CO₂ rebreathing.
◉ When used simple mask?
GUIDE WITH ANSWERS
◉ When must respirations be counted for a full minute?
Answer: If breathing is abnormal.
◉ What positions suggest respiratory distress?
Answer: Tripod or orthopneic.
◉ What does pulse oximetry measure?
Answer: Oxygen saturation (SpO₂).
◉ What physical signs indicate hypoxia?
Answer: Cyanosis of lips/nails and delayed capillary refill.
◉ How long may stabilization take after applying O₂?
Answer: 5-10 minutes
◉ What must be documented after oxygen application?
Answer: Assessment, intervention, patient response, teaching
provided.
◉ What defines low-flow oxygen devices?
, Answer: Set flow rate (LPM), variable FiO₂ depending on
breathing pattern.Used for low-moderate oxygen support.Do NOT
guarantee exact FiO₂.
◉ Nasal prongs (nasal cannula) - flow rate + FiO2
Answer: 1-6 LPM → 24-40% FiO₂
◉ when add humidity
Answer: more than 4 LPM
◉ Main disadvantages of nasal prongs?
Answer: Variable FiO₂, nasal dryness, skin irritation, dislodges
easily.
◉ Main advantages of nasal prongs?
Answer: Comfortable, allows eating/talking, inexpensive.
◉ Simple mask - flow rate + FiO2
Answer: 5-10 LPM → 35-50% FiO₂.
◉ Why minimum 5 LPM for simple mask?
Answer: Prevent CO₂ rebreathing.
◉ When used simple mask?
