A child with a suspected airway obstruction is brought to the emergency room. The parent reports a fever last night. He produces a harsh, strident sound on inspiration (stridor). Where is the obstruction likely to be located based on this information?

Pharynx

In the larynx

Bronchioles

Lower trachea

Answer and Explanation

The Correct Answer is B

Choice A reason: Obstruction in the pharynx may cause snoring or gurgling sounds, but it typically does not produce stridor. The pharynx is part of the upper airway, and while swelling here can contribute to airway compromise, stridor is more specifically associated with structures below the pharynx.

Choice B reason: Stridor is a high-pitched, harsh sound heard during inspiration and is most commonly associated with obstruction at the level of the larynx. Conditions such as croup, epiglottitis, or laryngeal edema can cause narrowing of the airway at this level, leading to turbulent airflow and stridor. The presence of fever and stridor strongly suggests inflammation or infection affecting the larynx.

Choice C reason: Bronchiolar obstruction typically causes wheezing, not stridor. Wheezing is heard during expiration and is associated with lower airway conditions such as bronchiolitis or asthma. It reflects small airway narrowing, not upper airway obstruction.

Choice D reason: Obstruction in the lower trachea may cause more generalized respiratory distress and possibly wheezing or diminished breath sounds, but it is not the typical source of stridor. Stridor is generated in the upper airway, particularly the larynx.

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Correct Answer is A

Explanation

Choice A reason: By age 2½ years, most toddlers have a full set of 20 deciduous (primary) teeth. These include incisors, canines, and molars. The eruption pattern typically begins around 6 months and completes by 30 months. This is the expected dental milestone for this age group.

Choice B reason: Having only 12 deciduous teeth at 2½ years may indicate delayed tooth eruption. While some variation exists, this number is below the expected range and would prompt monitoring or dental consultation.

Choice C reason: Permanent teeth do not begin to erupt until around age 6. A toddler should not have any permanent teeth at 2½ years. This choice is anatomically incorrect.

Choice D reason: The presence of permanent teeth at this age is abnormal. A toddler should have only deciduous teeth. This combination suggests either a misunderstanding or a developmental anomaly.

A. Beef fajitas on corn tortillas B. Turkey sandwich on rye bread C. Vegetable beef and barley soup D. Biscuits and cream gravy

Correct Answer is A

Explanation

Choice A reason: Corn tortillas are naturally gluten-free, making them a safe option for children with celiac disease. Beef fajitas, when prepared without gluten-containing marinades or additives, are also appropriate. This combination avoids wheat, rye, and barley, which are harmful to individuals with celiac disease due to the autoimmune reaction triggered by gluten.

Choice B reason: Rye bread contains gluten and is contraindicated in celiac disease. Even small amounts of gluten can damage the intestinal lining and cause symptoms such as diarrhea, abdominal pain, and malabsorption. A turkey sandwich should be served on gluten-free bread instead.

Choice C reason: Barley is a gluten-containing grain and must be avoided in celiac disease. Vegetable beef soup may be safe if prepared without barley or gluten-containing thickeners, but the inclusion of barley makes this option inappropriate.

Choice D reason: Biscuits are typically made with wheat flour, and cream gravy often contains flour as a thickening agent. Both components are likely to contain gluten and should be excluded from the diet of a child with celiac disease.

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A child with a suspected airway obstruction is brought to the emergency room. The parent reports a fever last night. He produces a harsh, strident sound on inspiration (stridor). Where is the obstruction likely to be located based on this information?

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