DSA images quality control for invasive diagnosis and treatment of serious epistaxis in nasopharyngeal carcinoma after radiotherapy

Objective To investigate the DSA images quality control and evaluate its clinical application in the treatment of serious epistaxis in patients with nasopharyngeal carcinoma after radiotherapy.Methods Between April 2000 and March 2010, 56 patients with nasopharyngeal carcinoma occurred serious epistaxis after radiotherapy had selective angiography of the internal and external carotid, and images were obtained with the digital subtraction angiography(DSA). Lateral images of each anatomical region were classified as being "diagnostic", i.e. images sufficient to make a decision on management, or "poor", If the two observers differed.Results 42 satisfied DSA images were obtained among 56, which show the tumor angiogenesis extravagated contrast material and vascular involvement. The bleeding site and target arteries were indentified, and the hemorrhage was successfully stopped through interventional therapy. Positive symptoms were not seen in 14 cases, or extra views were necessary.Conclusion Reasonable setting DSA technical data, including the body position in X-ray radiography, the contrast medium injection parameters, images special procedures, are the key to obtain better image and the base of interventional examination in the DSA examination of serious epistaxis in nasopharyngeal carcinoma after radiotherapy.