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Lockable implant pushing device and implant delivery system

A technology of a pushing device and a conveying system, applied in the field of medical devices, can solve the problems of complex structure, inconvenient operation, excessive friction, etc., and achieve the effect of convenient and simple operation and wide application range.

Pending Publication Date: 2020-01-03
HANGZHOU WEIQIANG MEDICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of this type of pushing device and delivery system are: ① the structure is complex, and the pushing device and the implant need to be directly rotated relative to each other during the delivery process or release process, and the rotation process is uncontrollable, resulting in inconvenient operation; In the human blood vessel, when it is washed by blood or rubbed by the inner wall of the curved blood vessel, the friction force may be too large or too small, causing the implant to be stuck, or the connection failure may cause the implant to be released early, resulting in the failure of the operation.

Method used

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  • Lockable implant pushing device and implant delivery system
  • Lockable implant pushing device and implant delivery system
  • Lockable implant pushing device and implant delivery system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] see Figure 1 to Figure 7 , the implant pushing device 10 of Embodiment 1 is used to push the implant 200 to a predetermined position in the patient's body and release it. The implant 200 includes, but is not limited to, a vascular filter, a vascular stent, a heart valve clamp, a heart defect occluder, a vascular plug, or a lung volume reducing elastomer. The implant 200 is made of a material with shape memory function, which can be stretched into a line shape and loaded into a hollow tube during use. The proximal end of the implant 200 is provided with a connecting portion, usually a curved recovery hook or at least one through hole, for forming a detachable connection with the implant pushing device 10 . In this embodiment, the implant 200 is an inferior vena cava filter, and a curved recovery hook is provided at the proximal end of the inferior vena cava filter, and the implant pushing device 10 transports the inferior vena cava filter to the patient's inferior vena...

Embodiment 2

[0085] The structure of the implant pushing device in the second embodiment is basically the same as that of the implant pushing device in the first embodiment, the difference is that in the second embodiment, the shape of the clip is different from that of the first embodiment .

[0086] Specifically, see Figure 9 to Figure 11 , the clamping arm 1320 is an arc bent away from the central axis, the hook 1310 is an arc whose opening points to the central axis, and the angle β between the tangent of the middle of the arc of the clamping arm 1320 and the central axis is in the range of 90° to 150°. Such arc-shaped clamping arms 1320 and hooks 1310 are more conducive to reducing the bending stress of the clamping component 1300 and improving the fatigue strength of the clamping component 1300 .

Embodiment 3

[0088] The structure of the implant pushing device in the third embodiment is basically the same as the structure of the implant pushing device in the first embodiment, the difference is that in the third embodiment, the structure of the clip is different from the structure of the clip in the first embodiment .

[0089] Such as Figure 12 As shown, each clamping arm 1320 has a first section 1320a and a second section 1320b connected from the proximal end to the distal end, the first section 1320a extends outward along the central axis, and the included angle A between the central axis and the central axis is The range is 120°≤A≤180°, the second segment 1320b is connected to the distal end of the first segment 1320a, and extends inward along the central axis, and the angle B between the second segment 1320b and the first segment 1320a is in the range of 90° °≤B≤150°. Therefore, when the clamping member 1300 of this embodiment is in a free state, the two clamping arms 1320 cro...

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PUM

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Abstract

The invention discloses a lockable implant pushing device and an implant delivery system. The implant delivery system includes the implant pushing device, an expansion device, a loading device, hemostasis devices and an outer sheath pipe. The pushing device includes a pushing component and a handle component connected to the proximal end of the pushing component. The pushing component includes a hollow pushing steel cable, an inner core movably installed in the pushing steel cable in a penetrating mode and a clamping member arranged at the distal end of the inner core and detachably connectedwith an implant. The clamping member includes at least two clamping arms, and a hook member is arranged at the distal end of at least one clamping arm. The hook members extend towards the central axisof the pushing steel cable or extend away from the central axis of the pushing steel cable, and the extending directions of the multiple hook members are different. Reliable connection between the lockable implant pushing device and the implant is achieved, the implant is prevented from being released in advance before reaching a designated site, and the connection can be released by only one hand operation to release the implant.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and relates to a lockable implant pushing device and an implant delivery system. Background technique [0002] In recent years, interventional therapy has been widely used in clinical applications. Interventional therapy refers to placing various materials and instruments into the heart, arteries, veins and other parts of the human body through catheter technology to treat cardiovascular diseases. For example, a vena cava filter (VCF for short) is placed in the patient's superior and inferior vena cava through catheter intervention to capture the dislodged thrombus and prevent the thrombus from moving up the vena cava system to the heart and lungs, causing pulmonary embolism; or blocking the left atrial appendage The device is delivered to the left atrial appendage to prevent the thrombus generated by atrial fibrillation from ascending to the brain, causing stroke or other systemic embol...

Claims

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Application Information

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IPC IPC(8): A61B17/00
CPCA61B17/00234A61B2017/00778A61B17/00
Inventor 张庭超李阳徐澧
Owner HANGZHOU WEIQIANG MEDICAL TECH CO LTD