Purpose : Due to limitation of C-arm angle, there is a difficulty in obtaining a working angle during cerebral angiography. Changing position of patient during cerebral angiography was attempted in order to overcome the limitation of C-arm angle and extend the scope of interventional procedure.
Materials and method : From January to December 2016, 32 cases, overcame the limitation of C-arm angle, among 562 cases of Aneurysm coiling performed by Philips Allura Clarity and GE Innova IGS630, in Seoul National University Hospital, were analyzed.
Result : Representative cases were compressed into four types. Firstly, a case with a large amount of Caudal angle, we couldn¡¯t obtain a working angle due to overly rotated C-arm angle. In response to fail, the extension of a patient¡¯s head was performed and we could obtain a working angle. Another case, the extension of a patient¡¯s head was performed with the large amount of Caudal angle, resulting in reducing the angle from 42 degree to 21 degree. In addition, the Flexion of a patient¡¯s head was performed with the large amount of Cranial angle, resulting in an angle reduction of 43 degree to 32 degree. Lastly, a case with a large amount of Caudal angle of Lateral tube was obtained by performing both extension and tilting of the patient¡¯s head. As a result, the angle was decreased to 34 degree from 48 degree.
Conclusion : With a change of the patient¡¯s position, it became possible to obtain a working angle that could not be seen due to the physical limitations of C-arm angle. It also enabled the Aneurysm coiling for the patients who could not doing procedure.
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