Journal of AdvancedMedical and Dental Sciences Research

Aim: To study the diagnosis of nasal bone fractures with Ultrasonography and Conventional Radiography. Methods: A cross-sectional study was conducted in the Department of Radiology. The conventional Waters and lateral nasal bone view radiography and high resolution ultrasonography of 110 patients with a clinical or forensic indication for the evaluation of nasal bone fracture were investigated. The negative likelihood ratio (LR-), positive likelihood ratio (LR+), specificity (Sp) and sensitivity (Se) were used for determining the diagnostic accuracy. The negative predictive value (NPV) and the positive predictive value (PPV) were also determined. Results: The Se, Sp, LR+, PPV and NPV of ultrasonography were higher than radiography (Table 1). The LR-of ultrasonography was lower than radiography.The LR+ of sonography for the diagnosis of nasal bone fracture was 65.70 [9.30–390.12] which represents a large and conclusive increase in the likelihood of the fracture in the presence of positive findings. Furthermore, LR- of sonography was 0.30 [0.12–0.23] which proposed a large to moderate decrease in the likelihood of the fracture, in the presence of negative findings. LR+ of radiography was 5.82 [2.89–6.29] which showed a small in- crease of the likelihood of fracture in positive results and the LR¯ of x-ray was 0.42 [0.23–0.44] which proposed a small decrease in the likelihood of the fractures when the findings were negative. Conclusion: High-resolution ultrasonography can be used as an accurate technique for evaluating nasal bone fracture. Conventional radiography can be replaced by high-resolution ultrasonograhy.