Aortic Arch Tangent Angle Measuring Ruler and Measuring Method

Abstract

The invention provides an arcus aortae tangential position angle measuring scale and measurement method. The measuring scale is provided with a protractor and a positioning ruler. The protractor is provided with a bottom edge indicating line and is provided with a zero degree indicating line perpendicular to the bottom edge indicating line and intersecting with a bottom edge at the middle point. Fine scale lines and scale numerical values are arranged on the inner side of an arc-shaped edge of the protractor. The scale numerical value corresponding to the zero-degree indicating line is 0. Scale numerical values in the clockwise and counter-clockwise directions on two sides of 0 are used for indicating 0-90 degrees. The positioning rule is provided with a long axis indicating line. The longaxis middle point of the long axis indicating line is hinged with a bottom middle part of the bottom edge indicating line via a hinge shaft. The measuring method is using the measuring scale to measure the arcus aortae tangential position angle. The invention solves problems of poor surgical effect and severe complication due to incorrect DSA projection angle in current prosthetics in a thoracicaorta cavity and can realize customized measurement of the projection angle of an arcus aortae part.

Description

technical field [0001] The invention relates to the technical field of medical equipment and clinical parameter measurement, in particular to an aortic arch tangent angle measurement ruler and a measurement method. Background technique [0002] At present, thoracic aortic repair (TEVAR) is widely used in the treatment of thoracic aortic dilated diseases (including thoracic aortic aneurysm, aortic dissection, and thoracic aortic pseudoaneurysm). important surgical procedures. [0003] In endovascular repair of thoracic aorta, most of the tubes of DSA machines need to be projected vertically on the aortic arch, and the aortic arch can be expanded on the two-dimensional image to the maximum extent, so as to accurately measure the distance of the lesion's anchoring zone (landing zone) and the stent precise positioning. During previous operations, empirical projection angles (left anterior oblique 45°) were used. Our research on the anatomical parameters of Chinese aortic dila...

AI Technical Summary

Problems solved by technology

[0006] However, at present, the DSA angiography of the aortic arch in clinical endovascular repair of the thoracic aorta still adopts an empirical projection angle, that is, left anterior oblique 45°, and is not aware of the technical problem that it does not meet the actual aortic arch tangential angle in most cases. Therefore, There is also no measuring device that can individualize the measurement of the projection angle of the aortic arch, accurately locate the release point of the proximal end of the stent, and reduce the occurrence of complications

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