ATI RN
NCLEX Questions for Oxygenation Questions
Question 1 of 5
Which waveform represents ventricular depolarization on an ECG?
Correct Answer: B
Rationale: The QRS complex represents ventricular depolarization on an ECG.
Question 2 of 5
A nurse is caring for a toddler who is having an acute asthmatic attack with copious mucus and difficulty breathing. The childs skin is cyanotic, respirations are labored and rapid, and pulse is rapid. What nursing diagnosis would have priority for care of this child?
Correct Answer: B
Rationale: Ineffective Airway Clearance is the priority due to mucus and breathing difficulty, directly addressing the life-threatening issue.
Question 3 of 5
It is especially dangerous to cause a spark in a room where which of the following gases is used?
Correct Answer: D
Rationale: The correct answer is D: Oxygen. Oxygen supports combustion, making it highly flammable. When a spark occurs in an oxygen-rich environment, it can lead to a fire or explosion. Carbon dioxide (A) is non-flammable and inert. Helium (B) is also non-flammable and inert. Nitrogen (C) is non-flammable and does not support combustion. Therefore, the presence of oxygen (D) makes it especially dangerous to cause a spark in a room with oxygen gas.
Question 4 of 5
Normal cardiac output is 4 to 6 L/min in a healthy adult at rest. Which of the following is the correct formula to calculate cardiac output?
Correct Answer: A
Rationale: The correct formula to calculate cardiac output is stroke volume multiplied by heart rate. This is because cardiac output is the amount of blood pumped by the heart in one minute, which is determined by the volume of blood ejected per heartbeat (stroke volume) and the number of heartbeats per minute (heart rate). Multiplying stroke volume by heart rate gives the total volume of blood pumped out by the heart per minute, representing cardiac output. Summary: A: Correct. Cardiac output = Stroke volume x Heart rate B: Incorrect. This formula does not consider heart rate. C: Incorrect. Cardiac index is not used to calculate cardiac output. D: Incorrect. This formula is the inverse of the correct formula.
Question 5 of 5
A nurse is suctioning a client's tracheostomy using an open system. Which of the following actions should the nurse take?
Correct Answer: C
Rationale: Correct Answer: C Rationale: Administering 100% oxygen before suctioning helps prevent hypoxia during the procedure. - Choice A: Using clean technique is incorrect; sterile technique is required for tracheostomy care. - Choice B: Applying suction when inserting the catheter can cause trauma to the airway. - Choice D: Suctioning for 20 seconds each time can lead to hypoxia and should be done for no longer than 10-15 seconds.