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Device for auxiliary fixing

A technology of positioning member and support frame, applied in the direction of catheter, etc., can solve the problems of easy falling off of injection, easy sliding injection point, myocardial wall wear, etc., to prevent damage or even puncture, reduce the difficulty of surgical operation, and increase stability. Effect

Pending Publication Date: 2019-02-22
NINGBO DIOCHANGE MEDICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to overcome the above-mentioned defects, the purpose of the present invention is to design a device for auxiliary fixation, which assists in the fixation of the injection device when injecting a beating heart, which can realize precise positioning injection, stable adsorption and difficult movement, and does not damage the tissue of the injection contact surface. Solve the existing problems in the prior art, such as inaccurate injection points caused by easy sliding of injection needles and delivery tubes due to heart beating, easy fall off of injections, and wear and tear on myocardial walls, etc.

Method used

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Effect test

Embodiment 1

[0055] see Figure 1a As shown, a device for auxiliary fixation provided by the present invention includes a support frame 1, a membrane structure 2 and a connecting piece 3, the distal part of the support frame 1 is in an open state, and the support frame 1 is composed of multiple The support rod 11 is composed of a support rod 11, the distal part of the support rod 11 is provided with a puncture-proof structure 12, the membrane structure 2 is fixedly connected to the support frame 1, and the distal part of the membrane structure 2 is provided with a reinforcing structure 21 , the connecting piece 3 is fixedly connected to the proximal end of the support frame 1, and the inside of the connecting piece 3 is hollow. This embodiment is suitable for injecting into the intracardiac surface of the ventricular wall to treat heart failure diseases.

[0056] Such as Figure 1a As shown, the support frame 1 is trumpet-shaped, the number of the support rods 11 is 2-40, and the support...

Embodiment 2

[0065] see figure 2 As shown, the structure of a device for auxiliary fixation in this embodiment is basically the same as that in Embodiment 1, the difference is that in this device in this embodiment, the reinforcing structure 21 is specifically an annular strip The reinforcement structure 21 is located at the distal end of the membrane structure 2, and expands outward along the membrane structure 2, and can be axially compressed along the midline of the support frame 1. The reinforcing structure 21 can be made of biocompatible polymer film, such as PU, PTFE, PET, PE, silica gel or one or more materials. At the same time, the trumpet-shaped reinforcing structure 21 can prevent the distal end of the support frame 1 from piercing into the inner wall of the left ventricle and cause damage. In addition, it can also make the device play a supporting role when vacuuming, and the distal end of the reinforcing structure is fastened to the ventricle wall. On the other hand, the vac...

Embodiment 3

[0067] The difference between this embodiment and Embodiment 1 is that, as Figures 11a to 11c As shown, the anti-puncture structure 12 is a structure that extends radially outward along the support rod 11 and gradually bends toward the proximal end of the support frame 1, and the curved sections of the support rod 11 are respectively point-supported on the tissue surface Above, the anti-puncture structures 12 are evenly arranged along the circumferential direction of the support frame 1, and the number of the anti-puncture structures 12 is at least three. The angle β between the tangent line at the end of the anti-puncture structure 12 and the central axis of the device is ≥90°. Such as Figure 11d As shown, the anti-puncture structure 12 cooperates with the inner wall 7 of the ventricle after unfolding, so that the anti-puncture structure 12 can extend along the inner wall 7 of the ventricle, so that the distal end of the anti-puncture structure 12 will not pierce the inner...

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Abstract

The invention relates to a device for auxiliary fixing. The device comprises a supporting frame (1), a membrane structure (2) and a connecting piece (3). The far end of the supporting frame (1) is inan opening state, the supporting frame (1) is composed of a plurality of supporting rods (11). The far ends of the supporting rods are provided with anti-puncture structures (12), the membrane structure (2) is fixedly connected to the supporting frame (1), the gar end of the membrane structure (2) is provided with a reinforcing structure (21), the connecting piece (3) is fixedly connected to the near end of the supporting frame (1), and the connecting piece (3) is hollow. The problems that in the prior art, due to heart beating, an injection needle and a conveying pipe are likely to slide, aninjection point is not accurate, an injectant is likely to be disengaged, and the myocardium is abraded and punctured are solved.

Description

technical field [0001] The present invention relates to the field of medical devices, in particular to a device for auxiliary fixation, which is delivered to selected parts of the human body by means of intervention through catheter technology, so as to assist the delivery tube to be adsorbed and fixed on the surface of the tissue, especially fixed on the surface of the tissue. The surface of the inner wall of the left ventricle of the heart. Background technique [0002] The full name of heart failure is heart failure, which refers to the failure of the systolic function or diastolic function of the heart to fully discharge the venous return blood, resulting in blood stasis in the venous system and insufficient blood supply in the arterial system, resulting in cardiac circulatory system disorders. Heart failure is the end result of most cardiovascular diseases and the leading cause of death, affecting nearly 23 million people worldwide. The prevalence of heart failure is 0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M25/04A61M25/01
CPCA61M25/0108A61M25/0127A61M25/04A61M2025/0166
Inventor 李彪陈超陈琦胡晓明李佳楠
Owner NINGBO DIOCHANGE MEDICAL TECH CO LTD
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