Localized air foci in the lower thorax in the patients with pneumothorax: Skip pneumothoraces
| Autor: | Naoya Takahashi, Takao Kiguchi, Motoi Shiotani, Takeshi Higuchi, Haruo Maeda |
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| Rok vydání: | 2013 |
| Předmět: |
Adult
Male Thorax medicine.medical_specialty Adolescent Radiography Sensitivity and Specificity Young Adult Japan Pneumoperitoneum Risk Factors Multidetector computed tomography Female patient medicine Humans Radiology Nuclear Medicine and imaging In patient Child Aged Aged 80 and over Lung business.industry Air Incidence Infant Pneumothorax Reproducibility of Results General Medicine Middle Aged medicine.disease respiratory tract diseases medicine.anatomical_structure Child Preschool Female Radiography Thoracic Radiology Tomography X-Ray Computed business |
| Zdroj: | European Journal of Radiology. 82:1338-1342 |
| ISSN: | 0720-048X |
| Popis: | Purpose To investigate the characteristics and imaging features of localized air foci in the lower thorax in patients with pneumothorax using thin-section multidetector computed tomography. Materials and methods Of 10,547 consecutive CT examinations comprising the chest, the CT scans of 146 patients with ordinary pneumothoraces were identified and retrospectively evaluated. The study group included 110 male and 36 female patients (mean age, 50 years; range, 1–93 years). All examinations were performed at our institution between January 2009 and December 2009. Cause of pneumothorax was classified as traumatic or non-traumatic. Localized air foci in the lower thorax were defined as being localized air collections in the lower thorax that did not appear to be adjacent to the lung. If these criteria were met, the shape, size, location laterality, and number of foci were evaluated. Associations with trauma, sex, severity of the pneumothorax, and laterality were evaluated using the χ 2 test. All P values Results Localized air foci in the lower thorax presented as slit-like or small ovoid air collections in the lowest part of the pleural space. These foci were observed in 79/146 (54.1%) patients. The traumatic pneumothoraces group showed a higher prevalence of these features than the non-traumatic group. Some foci that were situated in the anterior part mimicked the appearance of free intraperitoneal air. Conclusion Patients with pneumothorax commonly had localized air foci in the lower thorax. Because such foci can mimic pneumoperitoneum, accurate recognition of them is required to avoid confusion with free intraperitoneal air, especially in traumatic cases. |
| Databáze: | OpenAIRE |
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