Chang sign: Difference between revisions
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{{Short description|Radiologic sign}} |
{{Short description|Radiologic sign}} |
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{{Orphan|date=April 2024}} |
{{Orphan|date=April 2024}} |
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'''Chang sign''' is a radiologic sign for detecting [[pulmonary embolism]] in X-ray films. It refers to the dilatation and abrupt change in calibre of a previously normal descending pulmonary artery on a chest X-ray film.<ref>{{cite journal |last1=Mossbock |first1=R |title=[Experience with corrective operations for dysgnathia in cleft lip, palate and jaw]. |journal=Osterreichische Zeitschrift fur Stomatologie |date=December 1980 |volume=77 |issue=12 |pages=466-9 |pmid=6938914 |
'''Chang sign''' is a radiologic sign for detecting [[pulmonary embolism]] in X-ray films. It refers to the dilatation and abrupt change in calibre of a previously normal descending pulmonary artery on a chest X-ray film.<ref>{{cite journal |last1=Mossbock |first1=R |title=[Experience with corrective operations for dysgnathia in cleft lip, palate and jaw]. |journal=Osterreichische Zeitschrift fur Stomatologie |date=December 1980 |volume=77 |issue=12 |pages=466-9 |pmid=6938914}}</ref> Chang sign usually appears within 24 hours of the onset of chest pain due to pulmonary embolism,<ref>{{cite journal |last1=Saliba |first1=Thomas |last2=Tack |first2=Denis |title=Central Pulmonary Embolism Detected on a Chest X-Ray: A Case Report |journal=Journal of the Belgian Society of Radiology |date=15 February 2023 |volume=107 |issue=1 |pages=11 |doi=10.5334/jbsr.3052 |url=https://jbsr.be/articles/10.5334/jbsr.3052#B8}}</ref> and the maximal dilatation of the descending pulmonary artery often occurs in two to three days after the onset of pain.<ref name="roe">{{cite journal |last1=(Joseph) Change |first1=C.H. |last2=Davis |first2=W. Clayton |title=A roentgen sign of pulmonary infarction |journal=Clinical Radiology |date=January 1965 |volume=16 |issue=2 |pages=141–147 |doi=10.1016/S0009-9260(65)80007-1}}</ref> |
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==References== |
==References== |
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Revision as of 18:40, 30 April 2024
Chang sign is a radiologic sign for detecting pulmonary embolism in X-ray films. It refers to the dilatation and abrupt change in calibre of a previously normal descending pulmonary artery on a chest X-ray film.[1] Chang sign usually appears within 24 hours of the onset of chest pain due to pulmonary embolism,[2] and the maximal dilatation of the descending pulmonary artery often occurs in two to three days after the onset of pain.[3]
Chang sign is absent in case of co-existing pneumonia or other conditions causing central opacities, where the descending pulmonary artery cannot be visualised in the X-ray image.[3]
References
- ^ Mossbock, R (December 1980). "[Experience with corrective operations for dysgnathia in cleft lip, palate and jaw]". Osterreichische Zeitschrift fur Stomatologie. 77 (12): 466–9. PMID 6938914.
- ^ Saliba, Thomas; Tack, Denis (15 February 2023). "Central Pulmonary Embolism Detected on a Chest X-Ray: A Case Report". Journal of the Belgian Society of Radiology. 107 (1): 11. doi:10.5334/jbsr.3052.
{{cite journal}}: CS1 maint: unflagged free DOI (link) - ^ a b (Joseph) Change, C.H.; Davis, W. Clayton (January 1965). "A roentgen sign of pulmonary infarction". Clinical Radiology. 16 (2): 141–147. doi:10.1016/S0009-9260(65)80007-1.