DETERMINATION OF CUT-OFF POINT FOR ULTRASONOGRAPHIC FINDINGS IN NASAL BONE FRACTURE: COMPARISON OF THEIR CONSISTENCY WITH PHYSICAL EXAMINATION AND CONVENTIONAL RADIOGRAPHIC FINDINGS

Aghajanpour, Mohammad and Pourmatin, Sahel and Obeidavi, Zia (2016) DETERMINATION OF CUT-OFF POINT FOR ULTRASONOGRAPHIC FINDINGS IN NASAL BONE FRACTURE: COMPARISON OF THEIR CONSISTENCY WITH PHYSICAL EXAMINATION AND CONVENTIONAL RADIOGRAPHIC FINDINGS. The IIOAB Journal – Institute of Integrative Omics and Applied Biotechnology Journal, 7 (8). pp. 62-67.

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Abstract

The aim of this study was to demonstrate the cut-off point of ultrasonographic findings in nasal bone fracture and determining their consistency. A longitudinal, descriptive-analytic study was done on 90 patients (more than 15 years old) with clinical manifestations of a fractured nasal bone. Seventy two patients concluded the study successfully. High resolution ultrasonographic investigations were done by an expert consultant without knowledge of the clinical data or examination in five sessions. After collecting and completing information about patients, the data was analyzed using SPSS software. Ninety consecutive patients were enrolled in the study; Seventy two patients (44 men and 28 women) with the mean age of 26.56±12.3 years concluded the study successfully. In comparing the suggestive criteria for nasal bone fracture in physical examination, nasal bone depression had the most sensitivity (61.29%), epistaxis had the highest specificity (80%) and echymosis had the highest score of positive likelihood ratio (1.37) and the most PPV (89.47%). During the first three weeks after nasal trauma, sub-periosteal hematoma and lucency in the lateral nasal bone had the highest diagnostic value which were statistically meaningful (PV<0.001). The predictive value of lateral nasal bone lucency and sub-periosteal hematoma for estimating the elapsed time from the onset of nasal trauma in sonographic investigation were 67.7% and 86.3% (95% CI) respectively which were statistically meaningful (P=0.003, P=0.0001). HRUS is a reliable diagnostic tool for determining the chronicity of nasal bone fracture

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