OSSSC Nursing Officer-2023
Medical & Surgical Nursing
Easy
The nurse must know that the most accurate oxygen delivery system available is?
Appeared in: OSSSC Nursing Officer-2023
Explanation
- The Venturi mask is a high-flow delivery device, meaning the total gas flow it provides meets or exceeds the patient's peak inspiratory flow.
- It operates on the air-entrainment principle, using color-coded diluters that mix a fixed volume of room air with a specific flow of oxygen to deliver a precise Fraction of Inspired Oxygen (FiO₂).
- Because the FiO₂ is fixed and independent of the patient's breathing pattern (rate and depth), it is considered the most accurate and reliable oxygen delivery system among the options.
Why Other Options Were Wrong
- Option B: A nasal cannula is a low-flow device. The FiO₂ delivered is highly variable as it depends on the patient's respiratory rate, tidal volume, and whether they breathe through their nose or mouth.
- Option C: A partial non-rebreather mask is a low-flow system with a reservoir bag. While it can deliver a higher FiO₂, the concentration is not precise and varies with the patient's breathing and the fit of the mask.
- Option D: A simple face mask is a low-flow device. The FiO₂ is variable because room air is entrained through side ports and around the mask, diluting the oxygen unpredictably based on the patient's inspiratory flow.
Related Visual
Clinical Relevance
- Nursing practice connection: Knowing Accuracy and precision of different oxygen delivery systems helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
- The ability to deliver a precise FiO₂ makes the Venturi mask essential for managing patients with COPD, as they are at risk for CO₂ retention if given excessive oxygen.
- Nursing care for a patient with a Venturi mask includes ensuring the correct color-coded diluter is used for the prescribed FiO₂, the flowmeter is set correctly, and the air entrainment ports on the diluter are not blocked by bedding or clothing.
- What if? If a patient experiences acute, severe respiratory distress and needs the highest possible oxygen concentration immediately, a non-rebreather mask would be the best choice among non-invasive options, as it can deliver an FiO₂ of up to 95%, even if it's not as precise as a Venturi mask.
How to Approach the Question
- First, identify the key term in the question: 'most accurate'. This implies precision and reliability.
- Next, recall the two main categories of oxygen delivery systems: low-flow (variable performance) and high-flow (fixed performance).
- Evaluate each option. A nasal cannula, simple mask, and partial rebreather are all low-flow systems where the FiO₂ is affected by the patient's breathing.
- Recognize that the Venturi mask is a high-flow system specifically designed to deliver a precise, predetermined FiO₂ using the air-entrainment principle.
- Conclude that the device designed for precision (Venturi mask) is the correct answer to a question asking for the 'most accurate' system.
Concept Tested & Keywords
- Concept Tested: Accuracy and precision of different oxygen delivery systems.
- Stem keywords: oxygen delivery system, most accurate
- Lead-in keywords: most accurate
Question ID
Q3DSU7xCP1LlUHddDwGJ4M
Reference Book
E6 Nursing Fundamentals Taylor p. 731-733
E6 Nursing Fundamentals Potter Perry 12e Part 5 p. 7-9
Practise the full OSSSC Nursing Officer-2023
Attempt every question from this paper in a timed mock, then review the full solution for each one.
More Gas Exchange and Respiratory Function Questions
- Which is the most relevant knowledge about oxygen administration to a client with COPD?
- Patient in emergency department diagnosed to have fluid and air present in lung. What is the above-mentioned condition known as?
- Patient is suffering from dyspnea. Which position will you provide for patient to relieve?
- Identify the following instrument which is used in diagnostic procedures:
- Identify the instrument shown in the following image:
- Identify the tube in the following image:
- Which of the following method is used for high flow oxygen administration:
- The following conditions can be diagnosed using chest X-ray; EXCEPT:
- The X-ray finding in a patient with pleural effusion reveals that fluid starts to build up as a result of gravity in:
- Surgical procedure used to correct a deviated nasal septum is:
More OSSSC Nursing Officer-2023 Questions
- A number exceeds 30% of itself by 49. The number is?
- The greatest 4-digit number exactly divisible by 15, 20 and 25 is?
- sqrt(18) + sqrt(162) / sqrt(72) \= ?
- If a man spends 5/8 part of money and again earns 1/3 part of the remaining money, what part of his money is with him now?
- If a number is 50% more than the other, how much per cent is the second number less than the first?
- The average of 20 numbers is 48. If two numbers, namely, 53 and 70 are discarded, what is the average of the remaining numbers?
- Two numbers are in the ratio of 3:8. If the larger number is 40 more than smaller number, then the product of the numbers is:
- On selling an article for Rs. 900, the loss is 25%. To make a profit of 25%, the article must be sold at?
- 'A' can do 1/4 of a work in 6 days and 'B' can do 2/3 of the work in 12 days. In how many days both 'A' and 'B' together can do the work?
- A car covers the first 50 Km of its journey in 75 minutes and the remaining 30 Km in 25 minutes. What is the average speed of the car?