Aspiration pneumonia

A
• B
• C
• D
• E
• F
• G
• H
• I
• J
• K
• L
• M
• N
• O
• P
• Q
• R
• S
• T
• U
• V
• W
• X
• Y
• Z

Bronchoscopy

Lungs

Pneumococci organism

Respiratory system

Aspiration pneumonia is inflammation of the lungs and airways to the lungs (bronchial tubes) from breathing in foreign material.

Anaerobic pneumonia; Aspiration of vomitus; Necrotizing pneumonia; Aspiration pneumonitis; Chemical pneumonitis

Aspiration pneumonia is caused by breathing foreign materials (usually food, liquids, vomit, or fluids from the mouth) into the lungs. This may lead to:

• A collection of pus in the lungs (lung abscess)
• An inflammatory reaction
• A lung infection (pneumonia)

Aspiration of foreign material into the lungs can be caused by:

---

---

• Anesthesia
• Coma
• Decreased or absent gag reflex in people who are not alert (unconscious or semi-conscious)
• Dental problems
• Disorders that affect normal swallowing
• Disorders of the esophagus (esophageal stricture, gastroesophageal reflux)
• Excessive alcohol use
• Medications that affect alertness
• Old age
• Sedatives

Acidic material that is breathed into the lungs can cause severe lung injury. However, it may not necessarily lead to pneumonia.

Review Date: 03/17/2009
Reviewed By: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine; and Jatin M. Vyas, MD, PhD, Assistant Professor in Medicine, Harvard Medical School, Assistant in Medicine, Division of Infectious Disease, Department of Medicine, Massachusetts General Hospital. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.