Which one of the following indices a nurse has to consider as an indicator of good nutrition?

JIPMER Nursing Officer-2017

Applied Nutrition & Dietetics

Hard

Appeared in: JIPMER Nursing Officer-2017

Explanation

Pre-albumin is the most sensitive marker for assessing current nutritional status due to its short half-life of approximately 2 days.
A level of 18 mg/dl falls within the normal reference range for pre-albumin (15-36 mg/dL), indicating adequate recent protein intake.
Unlike other markers, its level changes rapidly in response to changes in nutrient intake, making it ideal for monitoring the effectiveness of nutritional support.

Option A: An albumin level of 2.5 gm/dl is significantly below the normal range of 3.5-5.0 g/dL. This indicates moderate to severe malnutrition (hypoalbuminemia), not good nutrition.
Option C: Although a transferrin level of 244 mg/dl is within the normal range (200-400 mg/dL), it is a less reliable indicator of nutritional status compared to pre-albumin. Transferrin levels are influenced by iron status (they increase in iron deficiency), which can confound the interpretation of nutritional status.
Option D: A total lymphocyte count (TLC) of 1900/microliter is below the generally accepted lower limit of normal for good nutritional status (greater than 2000 cells/mm³). This finding suggests mild nutritional depletion and a potentially compromised immune system.

Clinical Relevance

Nursing practice connection: Knowing Assessment of nutritional status using biochemical markers helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
Nurses frequently monitor these laboratory values to assess a patient's nutritional risk and to evaluate the effectiveness of nutritional interventions like enteral feeding or Total Parenteral Nutrition (TPN).
A declining pre-albumin level can be an early warning sign of malnutrition, prompting the nurse to collaborate with a dietitian for a more detailed assessment and intervention plan.
What if the patient also has a high C-reactive protein (CRP) level? A high CRP indicates inflammation. In this case, a low pre-albumin level might be due to the inflammatory response rather than poor nutrition, making it an unreliable nutritional marker. The nurse should consider other assessment data, such as dietary intake and weight changes.

How to Approach the Question

First, identify the core of the question: it asks for an indicator of 'good nutrition'. This means you are looking for a value that is within the normal range.
Evaluate each option against its known normal laboratory range. Eliminate options with values that clearly indicate malnutrition or deficiency (e.g., low albumin, low lymphocyte count).
For the options that fall within a normal range (in this case, pre-albumin and transferrin), compare their clinical utility as nutritional markers.
Recall the half-lives of the proteins. Pre-albumin has the shortest half-life (~2 days), making it the most sensitive indicator of current nutritional status, which is the standard for 'best' indicator in this type of question.
Select the option that represents a normal value for the most sensitive and specific indicator of recent nutritional intake.

Concept Tested & Keywords

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E6 Nutrition Monika Sharma 3e p. 301-303

E6 Medicine Harrison 22e Part 2 pp. 521-523, 522-524