Comparing the Ultrasonography Diagnostic Value with Standard Radiography in Detecting Nasal Fractures

Abstract

Background: Nasal bone fractures are the most typical kind of facial injuries. In recent years, ultrasonography has been suggested as an alternative method for detecting maxillofacial fractures. It can eliminate the risk of radiation exposure, especially in children and pregnant women. The objective of present study was to compare the diagnostic competency of conventional radiography with ultrasonography in the diagnosis of nasal injuries specially, fractures. Method: In prospective research, 331 patients with a history of midfacial trauma were enrolled. Following clinical examination, radiographs were obtained in lateral and occipitomental views. Ultrasonography was performed by an experienced sonologist, blinded to clinical findings in right and left lateral sides in addition to nasal dorsum. Images were analyzed by an experienced radiologist. Sensitivity, specificity and predictive values of radiology and US were determined by comparing their results with findings of the clinical examination as the gold standard. Results: In assessment of nasal fractures the sensitivity and specificity of ultrasonography were 97.79% and 97.66%, respectively; while for radiography these two factors were 81.21% and 86.66%, respectively. Based on the Chi-square test, ultrasonography was notably greater to radiography in diagnosing nasal fractures (P<0.001). Conclusion: Compared with radiography, ultrasonography had a higher sensitivity and specifity in detecting nasal fractures and seems to be an adequate method for the diagnosis of nasal fractures.