MP NHM CHO-2024 (Shift-1)
Biochemistry and Nutrition
Easy
Identify the given below image.
Appeared in: MP NHM CHO-2024 (Shift-1)
Explanation
- The instrument shown in the image is a Sahli's Hemoglobinometer, which is used for the manual estimation of hemoglobin in blood.
- This method works on the principle of colorimetry, where blood is mixed with N/10 HCl to form a brown-colored compound called acid hematin.
- The key components visible in the image, such as the comparator box with standard brown glass rods, a graduated tube, and a pipette, are characteristic of a Sahli's kit.
- The color of the acid hematin solution is visually compared against the standard in the comparator box to determine the hemoglobin concentration.
Why Other Options Were Wrong
- Option B: A sphygmomanometer is used to measure blood pressure and consists of an inflatable cuff, a pressure gauge (manometer), and a bulb, none of which are the primary components shown in the image.
- Option C: A thermometer is a device used for measuring body temperature. The complex kit with a comparator and glassware shown in the image is not a thermometer.
- Option D: A nebulizer is a respiratory device that turns liquid medicine into a mist for inhalation. The equipment in the image is for blood analysis, not for administering inhaled medication.
Related Visual
- Visual 1: Diagram: Labeled parts of a Sahli's Hemoglobinometer kit, clearly showing the comparator, pipette, graduated tube, and stirrer.
- Visual 2: Flowchart: Step-by-step procedure of hemoglobin estimation using Sahli's method, from blood collection and mixing with acid to the final color matching and reading.
Clinical Relevance
- Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Identification of medical laboratory equipment as background academic context rather than a clinical decision trigger.
- Hemoglobin estimation is a fundamental hematological test used to diagnose and classify anemia, monitor response to treatment for anemia, and assess the oxygen-carrying capacity of the blood before surgery or blood donation.
- While automated hematology analyzers are the standard in modern laboratories due to their higher accuracy and precision, the Sahli's method remains a crucial, low-cost diagnostic tool in resource-limited settings, rural health camps, and for educational purposes in nursing and medical colleges.
- A major source of error in this method is subjective visual comparison, which can lead to inter-observer variability. Proper training and good lighting are essential for reliable results.
How to Approach the Question
- This is an image-based identification question requiring recall of laboratory equipment.
- First, carefully observe the components within the kit shown in the image.
- Identify the key parts: a black comparator box with colored glass standards, a graduated glass tube, a pipette with a mouthpiece, and a cleaning brush.
- Recognize that this specific combination of equipment is designed for a colorimetric comparison test involving a liquid sample.
- Relate this function (hemoglobin measurement by color comparison) to the options provided.
- Systematically eliminate the other options by recalling their distinct functions: a sphygmomanometer for blood pressure, a thermometer for temperature, and a nebulizer for inhaled medication.
Concept Tested & Keywords
- Concept Tested: Identification of medical laboratory equipment.
- Stem keywords: Identify, image
- Lead-in keywords: BEST, MOST RELEVANT CLUE
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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