Cardiac septal defect occluder

Abstract

The invention discloses an occluder for heart septal defects. The occluder comprises a supporting frame, an upper positioning body, a lower positioning body, an upper liquid catheter, a lower liquid catheter, a plug, a sheath shell, a screw rod, two liquid feeding pipes, two puncture needles and a shaft sleeve, wherein a containing groove with an opening in the bottom end is arranged at the middle part of the supporting frame; the upper positioning body and the lower positioning body are arranged on the outer wall of the supporting frame at interval; the upper liquid catheter and the lower liquid catheter are arranged in the containing groove, and are respectively communicated with the upper positioning body and the lower positioning body; the plug is clamped at the opening of the containing groove and is provided with two liquid passing pipes which are respectively clamped into the upper liquid catheter and the lower liquid catheter; a sliding hole is formed in the middle part of the sheath shell; the screw rod is arranged in the sliding hole in a sliding manner, and the middle part of the screw rod is provided with installing holes provided with the two liquid feeding pipes; the two puncture needles are respectively arranged at the end parts of the two installing holes, and are respectively communicated with the two liquid feeding pipes; the shaft sleeve is rotatably arranged on the sheath shell, and the inner wall of the shaft sleeve is provided with inner threads meshed with outer threads of the screw rod.

Description

technical field [0001] The present invention relates to a medical heart occluder, in particular to a heart septal defect occluder which is suitable for minimally invasive occlusion surgery, and which is convenient and quick to operate, and safer to use, and can be used for repairing the open hole of the foramen ovale. atrial septal defect (ASD), ventricular septal defect (VSD) and patent ductus arteriosus (PDA). Background technique [0002] The prevalence of congenital heart disease in my country is 6.87‰~14.39‰, among which, ventricular septal defect ranks first, accounting for 30.4%~59.68% of the incidence of congenital heart disease, atrial septal defect accounts for 18%~39.8%, patent ductus arteriosus accounts for 5% to 14.9%. Among these children with congenital heart disease, quite a few can be treated with transthoracic minimally invasive closure, so as to avoid damage to extracorporeal circulation, avoid blood transfusion, reduce surgical incision, shorten hospitali...

AI Technical Summary

Problems solved by technology

[0003] At present, almost all heart occluders are made of nickel-titanium memory alloy, and the alloy can be gradually corroded in the body, and cause nickel ions to enter the blood and endocardial cells, damaging human health. Some products are on the surface of nickel-titanium alloy Plating a layer of ceramics to improve its biocompatibility, but the process of the product is more complicated, the cost increases, and its effectiveness has yet to be verified by long-term clinical observation. Moreover, these metal structures will permanently remain in the patient's body and will be used in the patient's future. Other imaging examinations may cause interference, and may also cause unnecessary trouble during some special security checks; and may have a negative impact on the patient's psychology

In addition, the polyester fiber membrane in the middle of the disc cannot form an immediate occlusion effect, and may cause hemolysis and aseptic inflammatory reactions in patients. After the occluder is implanted in the body, the endocardial tissue or vascular endothelium around the defect will be damaged. Gradually cover the surface of the occluder. Once the heart defect is completely covered by its own tissue and endothelial cells, the value of the occluder will not be great. As long as the mechanical strength of the new tissue covering the defect is large enough, no occluder is needed permanent in the body

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