PCT Oxygen and Respiratory Assistance 1 — Questions and Answers

Question 1: What is the primary purpose of oxygen therapy in patient care?

To treat infections.
To increase blood pressure.
To assist breathing and increase oxygen saturation (Correct answer)
To reduce fever.

Correct answer: To assist breathing and increase oxygen saturation

The primary purpose of oxygen therapy in patient care is to assist breathing and increase oxygen saturation levels in the blood. It is administered to patients experiencing hypoxemia (low blood oxygen) due to various medical conditions, helping to ensure adequate oxygen delivery to tissues and organs. Oxygen therapy improves respiratory function and supports overall physiological stability.

Question 2: Which device delivers low-flow oxygen to patients?

Ventilator
Nebulizer
Nasal cannula (Correct answer)
CPAP machine

Correct answer: Nasal cannula

A nasal cannula is a common, comfortable device used to deliver low concentrations of oxygen, typically for patients requiring 1-6 liters per minute. It consists of two prongs that fit into the nostrils, making it suitable for patients who can breathe on their own but need supplemental oxygen. Other options like ventilators and CPAP machines deliver higher flows or positive pressure, while a nebulizer delivers medication.

Question 3: What is the normal oxygen saturation range for a healthy individual?

95-100% (Correct answer)
80-85%
60-75%
40-55%

Correct answer: 95-100%

For a healthy individual, normal oxygen saturation (SpO2) levels typically range between 95% and 100%. This indicates that the red blood cells are adequately saturated with oxygen, ensuring proper oxygen delivery to the body's tissues. Values below this range may indicate hypoxemia, requiring further assessment or intervention.

Question 4: Which of the following is a potential hazard of oxygen therapy?

Oxygen toxicity (Correct answer)
Increased infection risk
Muscle cramps
Hearing loss

Correct answer: Oxygen toxicity

Oxygen toxicity is a potential hazard of oxygen therapy, especially when high concentrations of oxygen are administered for prolonged periods. Excessive oxygen can damage lung tissue and other organs due to the formation of harmful free radicals. Therefore, oxygen therapy must be carefully monitored and administered at the lowest effective dose.

Question 5: How should an oxygen tank be stored?

Lying flat on the floor
Near heat sources
In a secured upright position away from flammable materials (Correct answer)
In a closed container

Correct answer: In a secured upright position away from flammable materials

Oxygen tanks contain highly pressurized oxygen, which is a fire accelerant. Storing them in a secured upright position prevents them from falling and potentially rupturing, while keeping them away from flammable materials minimizes the risk of fire or explosion. Proper storage is crucial for safety in any healthcare setting.

Question 6: What should be done before applying a nasal cannula?

Soak it in alcohol
Cool it in a refrigerator
Inspect and test the equipment (Correct answer)
Ask the patient to apply it themselves

Correct answer: Inspect and test the equipment

Before applying a nasal cannula or any medical equipment, it is essential to inspect and test it to ensure it is functioning correctly and is free from damage. This step helps prevent complications, ensures proper oxygen delivery, and maintains patient safety. Checking for kinks, leaks, or blockages is part of this crucial preparation.

Question 7: Which sign indicates a patient may need respiratory assistance?

Clear speech
Increased appetite
Shortness of breath or labored breathing (Correct answer)
Sleeping well

Correct answer: Shortness of breath or labored breathing

Shortness of breath (dyspnea) or labored breathing are clear indicators that a patient is experiencing respiratory distress and may require assistance. These signs suggest inadequate oxygenation or ventilation, prompting healthcare professionals to assess the patient's respiratory status and intervene as needed. Other options listed are signs of good health.

Question 8: Why must smoking be strictly prohibited near oxygen sources?

It causes corrosion
It creates moisture
It can ignite fires or explosions (Correct answer)
It deactivates oxygen

Correct answer: It can ignite fires or explosions

Oxygen is a highly combustible gas that vigorously supports combustion. Even though it's not flammable itself, it significantly increases the intensity and speed of fires. Therefore, smoking or any open flames near oxygen sources are strictly prohibited to prevent severe fires or explosions, which can cause serious injury or death.

Question 9: What should be monitored during oxygen therapy?

Blood sugar levels
Oxygen saturation (SpO2) (Correct answer)
Cholesterol levels
Height and weight

Correct answer: Oxygen saturation (SpO2)

During oxygen therapy, monitoring oxygen saturation (SpO2) using a pulse oximeter is crucial to assess the effectiveness of the therapy and ensure the patient is receiving adequate oxygen. This measurement helps healthcare providers adjust oxygen flow rates to maintain target SpO2 levels and prevent both hypoxemia and hyperoxia.

PCT Oxygen and Respiratory Assistance 1

What is the primary purpose of oxygen therapy in patient care?