Background: Pulmonary embolism (PE) can be easily diagnosed with computed tomography pulmonary angiography (CTPA). However, the diagnosis of PE is difficult when contrast material cannot be used.
Objectives: The aim of this study is to investigate whether an increase in Pulmonary Artery- Diameter and an increase in PA-Diameter / Ascending Aortic-Diameter ratio can be used in the diagnosis of PE.
Methods: CTPA of patients diagnosed with PE (88 patients) and control group (89 patients) were examined retrospectively. Aortic (Ao) and pulmonary artery (PA) diameters were measured radiologically. PA-Diameter/Ao-Diameter ratio were proportioned.
Results: Mean D-Dimer levels were found to be higher in the PE group (7.31±3.528 mcg/L) than in the control group (1.52±1.042 mcg/L), (p<0.001). PE diagnosis of right main PA, right segmental PA and right subsegmental PA was observed more than left. In PE group the mean Ao-Diameter (35,14±4,55 mm) was larger than in control group (34,97±5,28 mm), (p=0.828). In PE group the mean main PA-Diameter (30,45±4,77 mm) was larger than in control group (28,35±3,81 mm), (p=0.001). Also in PE group the mean main PA-Dimeter/Ao-Diameter ratio (0,87±0,15) were higher than in control group (0,82±0,13), (p=0.016).
Conclusion: The increase in PA-Diameter and PA-Diameter/Ao-Diameter ratio in non-contrast CT can be used in the diagnosis of PE in patients with suspected PE in whom contrast cannot be given in the ED.
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