Which clinical finding should prompt iodine deficiency screening?

BTSC Staff Nurse 30July-2025

Medical & Surgical Nursing

Easy

Appeared in: BTSC Staff Nurse 30July-2025

Explanation

Visible goitre, an enlargement of the thyroid gland, is a classic and direct clinical manifestation of iodine deficiency.
Iodine is an essential component for the synthesis of thyroid hormones (T4 and T3).
In a state of iodine deficiency, the pituitary gland increases the secretion of Thyroid-Stimulating Hormone (TSH).
Prolonged stimulation by TSH causes the thyroid gland to grow in size (hypertrophy) as a compensatory mechanism to trap more available iodine from the blood, leading to the formation of a goitre.

Option A: Hyperreflexia (exaggerated reflexes) is a characteristic sign of hyperthyroidism, a condition of excessive thyroid hormone. Iodine deficiency leads to hypothyroidism (insufficient thyroid hormone), which is typically associated with hyporeflexia (slowed reflexes).
Option B: Bleeding is not a recognized clinical sign of iodine deficiency. Bleeding tendencies are related to coagulation disorders, platelet dysfunction, or deficiencies of other nutrients like Vitamin K.
Option D: Hypertension is not a specific or primary indicator for iodine deficiency. While severe, chronic hypothyroidism can sometimes cause an increase in diastolic blood pressure, hypertension is a very common condition with numerous other causes.

Clinical Relevance

Nursing practice connection: Knowing Clinical signs of iodine deficiency helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
Nurses are instrumental in identifying goitre during routine physical examinations, which is a critical first step in diagnosing iodine deficiency, especially in at-risk populations.
Screening for iodine deficiency is vital in pregnant women, as severe deficiency can lead to cretinism, a form of irreversible mental and physical disability in the newborn.
In India, the National Iodine Deficiency Disorders Control Programme (NIDDCP) emphasizes the use of iodized salt to prevent these disorders, a key public health message for nurses to promote.

How to Approach the Question

First, identify the core concept of the question, which is the clinical manifestation of 'iodine deficiency'.
Recall the primary physiological role of iodine: it is essential for the thyroid gland to produce thyroid hormones.
Consider the body's compensatory mechanism when a necessary substance is lacking. In this case, without enough iodine, the thyroid gland is stimulated to work harder and grows larger to try and capture more iodine.
Evaluate each option based on this physiological understanding:
Hyperreflexia is linked to an overactive thyroid (hyperthyroidism), the opposite of what iodine deficiency causes.
Bleeding has no direct physiological link to iodine metabolism.

Concept Tested & Keywords

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E6 Medicine Harrison 22e Part 2 p. 945-947

E6 Ghai Essential Pediatrics(pp 26-904 of 913) p. 540-542

E6 Medicine Davidson Principles Practice 24e p. 667-669