SGPGI Nursing Officer-2023
Medical & Surgical Nursing
Easy
Which of the following oxygen delivery systems delivers a preset or defined oxygen concentration to the patient?
Appeared in: SGPGI Nursing Officer-2023
Explanation
- The Venturi mask is a high-flow device that delivers a precise and constant fraction of inspired oxygen (FiO₂).
- It operates on the Venturi principle, using color-coded adapters that mix a specific volume of room air with a fixed flow of oxygen.
- This mechanism ensures the delivered FiO₂ remains stable even if the patient's breathing rate or depth changes.
- The image provided shows these color-coded adapters, each marked with the exact FiO₂ it delivers (e.g., 24%, 28%, 35%).
Why Other Options Were Wrong
- Option A: A simple face mask is a low-flow, variable-performance device. The FiO₂ delivered is not precise and changes with the patient's breathing pattern and the fit of the mask.
- Option C: A nasal cannula is a low-flow, variable-performance device. The FiO₂ is unpredictable because it depends on the patient's respiratory rate, tidal volume, and whether they are breathing through their nose or mouth.
- Option D: A mask with a reservoir (like a non-rebreather) delivers a high FiO₂, but it is not a fixed or preset concentration. The actual FiO₂ varies with the mask's seal and the patient's inspiratory flow.
Related Visual
Clinical Relevance
- Nursing practice connection: Use the key finding related to Classification and function of oxygen delivery systems, specifically fixed-performance versus variable-performance devices to guide bedside assessment, documentation, and the next nursing action.
- Precise oxygen delivery is critical for patients with Chronic Obstructive Pulmonary Disease (COPD). High, uncontrolled oxygen levels can suppress their hypoxic respiratory drive, leading to carbon dioxide retention and respiratory failure.
- The Venturi mask is the preferred device for COPD patients because it provides a low, constant, and reliable oxygen concentration, preventing hypercapnia.
- Nursing responsibility includes selecting the correct color-coded adapter for the prescribed FiO₂, setting the flow meter as indicated on the adapter, and ensuring the air entrainment ports are not obstructed by blankets or clothing.
How to Approach the Question
- First, identify the key phrase in the question: 'preset or defined oxygen concentration'. This points towards a 'fixed-performance' or 'high-flow' delivery system.
- Recall the different types of oxygen delivery systems and their primary characteristics.
- Differentiate between low-flow (variable) and high-flow (fixed) systems.
- Nasal cannulas and simple face masks are classic examples of variable-performance devices where the FiO₂ changes with the patient's breathing.
- Reservoir masks provide high FiO₂ but are still variable.
- The Venturi mask is specifically designed with air-entrainment ports to deliver a precise, predictable FiO₂. The color-coded adapters are a strong clue to its function.
Concept Tested & Keywords
- Concept Tested: Classification and function of oxygen delivery systems, specifically fixed-performance versus variable-performance devices.
- Stem keywords: oxygen delivery systems, preset, defined oxygen concentration
- Lead-in keywords: Which
Question ID
Q9IEaTtZBgMcpJ1aOJaaD8
Reference Book
E6 Nursing Fundamentals Taylor p. 731-733
E6 Nursing Fundamentals Potter Perry 12e Part 5 p. 7-9
Practise the full SGPGI 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 SGPGI Nursing Officer-2023 Questions
- A plane can cover 6000 km in 8 hours. If the speed is increased by 250 kmph, then the time taken by the plane to cover 9000 km is?
- If medicine costs 64 after 20% discount is allowed, what was its original price?
- A 5-year-old child, his weight is 18 kg. Which size of Foleys catheter would be appropriate for this child?
- All visitors traveling from India to Kenya, Uganda, Rwanda, Nigeria, Mali, Ghana, and Ethiopia are required to be vaccinated against which vaccine wi…
- Total doses required of COVIDSHIELD vaccine in health care worker?
- Renal stone, polyuria, weakness, hypercalcemia is a result of
- One patient comes to the clinic with redness, pain, and tenderness in the breast. What would be the possible cause of the breast abscess?
- Most common STD in men?
- A child admitted with an eye infection. The ophthalmologist prescribed antibiotic eye drops. Where should the eye drops be administered?
- What is the best way to prevent the spread of infection in the ICU?