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Which of the following is the most common site of aspiration pneumonia?

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asked Apr 6, 2017 in Medicine by Rajesh Bahara
During dental procedures, it is possible that small fragments may be aspirated into the trachea and cause aspiration pneumonia. If the patient is sitting upright during the procedure, which of the following is the most common site of aspiration pneumonia?

(A) Left lower lobe
(B) Left upper lobe
(C) Lingula
(D) Right lower lobe
(E) Right upper lobe

1 Answer

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Best answer
(D) Right lower lobe
 The right main bronchus is more vertical and wider than the left, and aspirated particles are more likely to lodge at the junction of the right inferior and right middle bronchi. Because of this, aspiration pneumonia contracted when an individual is in an upright position is most common in the right lower and middle lobes.

Answer A is incorrect. The left main bronchus is narrower and less vertical than the right main bronchus. The right main bronchus is more vertical and wider than the left, and aspirated particles are more likely to lodge at the junction of the right inferior and right middle bronchi.

Answer B is incorrect. The left main bronchus is narrower and less vertical than the right main bronchus. The right main bronchus is more vertical and wider than the left, and aspirated particles are more likely to lodge at the junction of the right inferior and right middle bronchi.

Answer C is incorrect. The lingula is in the left lung, and the left main bronchus is narrower and less vertical than the right main bronchus. The right main bronchus is more vertical and wider than the left, and aspirated particles are more likely to lodge at the junction of the right inferior and right middle bronchi.

Answer E is incorrect. When a person is supine, aspiration pneumonia may affect the up- per lobes and posterior segments of the lungs, since they become the gravity-dependent regions when a person lies flat.
answered Apr 6, 2017 by Rajesh Bahara

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