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Supine subpulmonary pneumothorax

F M Ziter, J L Westcott

AJR. American Journal of Roentgenology

|October 1, 1981

Summary

This summary is machine-generated.

In recumbent patients, intrapleural air (pneumothorax) can appear subpulmonary. Look for a poorly defined basilar hyperlucency and specific diaphragmatic signs to aid diagnosis.

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Area of Science:

Radiology
Pulmonary Medicine
Diagnostic Imaging

Background:

Intrapleural air, or pneumothorax, can present uniquely in recumbent patients.
The typical signs of pneumothorax may be obscured in this position, complicating diagnosis.
Identifying subtle radiographic findings is crucial for accurate detection.

Purpose of the Study:

To describe the characteristic radiographic signs of pneumothorax in recumbent patients.
To highlight key imaging findings that aid in the diagnosis of subpulmonary air collection.
To improve the detection rate of pneumothorax in supine or lateral positions.

Main Methods:

Review of chest radiographs in patients with confirmed pneumothorax in recumbent positions.
Analysis of the typical and atypical locations of intrapleural air.

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Identification of associated radiographic findings that suggest pneumothorax.

Main Results:

Intrapleural air often collects in a subpulmonary location in recumbent individuals.
A poorly defined basilar hyperlucency may be the primary indicator.
Anterior costophrenic sulcus depression, a "double" diaphragm appearance, distinct cardiac apex, and pericardial fat tags are helpful associated findings.

Conclusions:

Subtle radiographic signs are key to diagnosing pneumothorax in recumbent patients.
Awareness of these specific findings can improve diagnostic accuracy.
These signs assist radiologists in identifying intrapleural air when lung margins are obscured.