MP NHM CHO-2024 (Shift-1)
Community Health Nursing
Easy
An Ice Lined Refrigerator (ILR) maintains a temperature of _______________.
Appeared in: MP NHM CHO-2024 (Shift-1)
Explanation
- An Ice Lined Refrigerator (ILR) is specifically engineered to maintain a cabinet temperature between +2°C and +8°C.
- This temperature range is critical for storing most vaccines under the Universal Immunization Programme (UIP) without losing their potency.
- The ice lining provides a long 'hold-over time' during power outages, ensuring the temperature remains within this safe range.
- This specific range prevents both heat damage and accidental freezing of sensitive vaccines.
Why Other Options Were Wrong
- Option B: The range +5°C to +10°C is incorrect. An upper limit of +10°C is too high and can lead to the degradation of heat-sensitive vaccines, reducing their effectiveness.
- Option C: The range -5°C to -10°C represents freezing temperatures. ILRs are refrigerators, not freezers. Storing most vaccines at this temperature would destroy them.
- Option D: The range 0°C to +4°C is too narrow and dangerously close to freezing. The lower limit of 0°C poses a significant risk of freezing and damaging freeze-sensitive vaccines like DPT, TT, and Hepatitis B.
Related Visual
- Visual 1: Diagram - An annotated diagram of an Ice Lined Refrigerator (ILR) showing the top-opening lid, the ice-pack lining, and the correct placement of different vaccine types in the basket.
- Visual 2: Flowchart - A flowchart illustrating the vaccine cold chain, showing the movement of vaccines from the manufacturer through Walk-in-Coolers/Freezers, ILRs, and finally to the beneficiary in vaccine carriers.
Clinical Relevance
- Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Temperature maintenance range of an Ice Lined Refrigerator (ILR) in the vaccine cold chain as background academic context rather than a clinical decision trigger.
- A nurse's primary responsibility is to monitor and record the temperature of the ILR twice daily to ensure it remains within the +2°C to +8°C range. Any deviation must be reported immediately.
- Failure to maintain the cold chain can lead to Vaccine Preventable Diseases (VPDs) outbreaks, even in a vaccinated population, as the vaccines would be rendered ineffective.
- Understanding correct vaccine placement within the ILR is a critical patient safety measure to prevent administration of a vaccine damaged by freezing.
How to Approach the Question
- This is a factual recall question common in community health nursing.
- Identify the key term in the question: 'Ice Lined Refrigerator (ILR)'.
- Recall the standard temperature ranges for different types of cold chain equipment used in public health.
- The temperature for refrigeration of vaccines is a universally standard value. Associate ILR with the +2°C to +8°C range.
- Eliminate options that are for freezing (negative temperatures) or have unsafe upper or lower limits (+10°C or 0°C).
Concept Tested & Keywords
- Concept Tested: Temperature maintenance range of an Ice Lined Refrigerator (ILR) in the vaccine cold chain.
- Stem keywords: Ice Lined Refrigerator, ILR, temperature
- Lead-in keywords: maintains a temperature of
Question ID
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Practise the full MP NHM CHO-2024 (Shift-1)
Attempt every question from this paper in a timed mock, then review the full solution for each one.
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