Intraoperative freezing elephant trunk stent capable of realizing transesophageal ultrasound guided localization

Abstract

The invention relates to the field of a medical appliance, and particularly discloses an intraoperative freezing elephant trunk stent capable of realizing transesophageal ultrasound guided localization. The intraoperative freezing elephant trunk stent capable of realizing transesophageal ultrasound guided localization comprises an air guide tube and an air bag, wherein after passing through a holepassage of a stent body from top to bottom, the air guide tube communicates with an inner cavity of the air bag; and the air bag is of a flexible bag body structure and can be inflated to expand. Theguide-in and release of the stent body can be completed in an transesophageal ultrasound guided way; the hybrid operation is not needed; the popularization and the application are facilitated; in addition, the localization of the stent body is accurate; and the distal end of the stent body can be effectively prevented from entering the false lumen, so that the operation risk is reduced.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to an intraoperative frozen elephant trunk bracket capable of transesophageal ultrasound guidance and positioning. Background technique [0002] Acute Stanford type A aortic dissection is an acute aortic disease with rapid onset, rapid progression, high mortality, difficult operation, and poor prognosis; Arterial medial layer, leading to aortic medial splitting to form true and false lumens; currently, the most commonly used surgical method for the treatment of this disease is ascending aorta and aortic arch replacement plus stent elephant trunk surgery; deep hypothermic circulatory arrest is used during the operation to descend artificial quadrifurcation vessels Replace the aortic arch and its three vascular branches (brachiocephalic trunk, left common carotid artery, left subclavian artery), and perform elephant trunk stent implantation at the distal end of the aorta at the same tim...

AI Technical Summary

Problems solved by technology

[0004] First, the introduction process of the elephant trunk stent is complicated or inaccurate: during the operation, a guide wire needs to be preset through the femoral artery under the guidance of X-rays, and then introduced into the elephant trunk stent through the guide wire, which needs to be completed in the hybrid operating room, which is not conducive to popularization and application; another method is to directly introduce the elephant trunk stent into the aorta under direct vision, but this method may introduce the distal end of the elephant trunk stent into the false lumen, causing the distal aorta to continue to expand and rupture

[0005] Second, unsatisfactory distal aortic remodeling: At present, the distal end of the elephant trunk stent does not pass through the middle of the descending aorta, resulting in poor remodeling of the distal aorta in about 20-40% of patients. Issues with Reoperative Intervention

[0006] Third, the proximal and distal diameters of the elephant trunk stent are the same during the operation, which does not conform to the physiological characteristics of the aorta, and the larger diameter of the distal end of the stent is likely to cause rupture of the aortic intima, resulting in continuous expansion of the distal artery. Long-term reoperation intervention increases patient suffering

[0007] Fourth, the existence of the covering material at the distal end of the elephant trunk stent will cover the intercostal artery, causing spinal cord ischemia and resulting in limb paresis or paraplegia

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