The thermometer in which the result is seen within 45 seconds is?

Appeared in: AIIMS Raipur - 2017 (shift-2)

Explanation

Electronic (digital) thermometers measure temperature over a period that can range from a few seconds to 60 seconds, depending on the model and measurement site (oral, axillary, rectal).
A reading time of 45 seconds falls squarely within this typical operational range, making it the correct choice.
These devices work by using a sensor (thermistor) in the probe to measure temperature and display it numerically after a set time or when the temperature stabilizes.

Option B: Clinical (glass) thermometers are significantly slower, requiring 3-5 minutes for an accurate oral reading.
Option C: Disposable chemical-dot thermometers typically take around 60 seconds to provide a stable reading, which is slower than the 45 seconds specified.
Option D: Tympanic membrane thermometers are much faster than 45 seconds, providing a reading in just 1-3 seconds.

Visual 1: Infographic - A comparative chart showing images of an electronic, tympanic, temporal, and disposable thermometer, with their respective reading times listed below each.
Visual 2: Diagram - Illustration showing the correct placement of an electronic thermometer for an oral reading (in the sublingual pocket).

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Measurement of body temperature using different types of thermometers as background academic context rather than a clinical decision trigger.
Choosing the appropriate thermometer is a key nursing skill that depends on the patient's age, condition, and the clinical situation.
For routine checks in cooperative adults, electronic thermometers offer a good balance of accuracy and speed.
Infection control is critical. Always use a new disposable probe cover for each patient when using electronic or tympanic thermometers.

How to Approach the Question

First, identify the key piece of information in the question stem, which is the time frame: 'within 45 seconds'.
Next, recall or look up the typical reading times for each type of thermometer listed in the options.
Compare the 45-second timeframe to the known reading times for each device.
Eliminate the options that are clearly too fast (Tympanic: 1-3 seconds) or too slow (Clinical: 3-5 minutes).
Evaluate the remaining options. An electronic thermometer's range (10-60 seconds) fits the 45-second mark perfectly, while a disposable thermometer is typically slower (~60 seconds).
Select the option that most accurately matches the specified time.

Concept Tested & Keywords

Concept Tested: Measurement of body temperature using different types of thermometers.
Stem keywords: thermometer, result, 45 seconds
Lead-in keywords: is

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Practise the full AIIMS Raipur - 2017 (shift-2)

Attempt every question from this paper in a timed mock, then review the full solution for each one.