An anti-break sheath and delivery system with the break-proof sheath
An anti-breakage and sheath technology, which is applied in the direction of catheters, trocars, balloon catheters, etc., can solve the problem of weak tensile strength of the sheath in the axial direction, and achieve the effect of improving strength and avoiding breaking
Active Publication Date: 2017-01-25
VENUS MEDTECH (HANGZHOU) INC
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Problems solved by technology
[0006] However, in order to ensure the compliance of the expansion section after loading the device, in many cases, the expansion section is a pure plastic sheath without adding a mesh reinforcement layer that will affect the compliance and diameter. The expansion section is still the axial direction of the entire sheath. Tensile Weak Links
Method used
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[0032] The present invention will be further explained below in conjunction with specific examples.
[0033] figure 1 It shows a schematic structural view of the sheath tube and the sheath core in the prior art, and only the connecting portion between the expansion section and the tube body is shown in the figure.
[0034] figure 1 As can be seen in the figure, the sheath includes a tube body 1 and an expansion section 2 connected to the distal side of the tube body 1 . The channel in the sheath tube is used to pass through the sheath core, and the sheath core includes a core tube 3, a fixed head 4 and a guide head fixed at the distal end of the core tube ( figure 1 (not shown in ), between the fixed head 4 and the guide head and the inner wall of the expansion section 2 is an accommodation chamber 5 for placing implantation instruments. This prior art can be used in the present invention as far as the sheath core itself is concerned.
[0035] The expansion section 2 is a tu...
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The invention discloses a breakage-proof sheath tube, which comprises a tube body and an expansion section for accommodating implantation instruments. The distal side of the tube body is in contact with the expansion section. There are at least two reinforcing ribs, and the proximal ends of the reinforcing ribs extend out of the expansion section and are fixedly connected in the tube wall of the tube body. The material of the reinforcing rib is Kevlar fiber. The diameter of the reinforcing rib is 0.03-0.12 mm. There are 2 to 4 reinforcing ribs. The anti-break sheath tube of the present invention maintains the overall compliance of the sheath tube and at the same time increases the strength of the expansion section, which can prevent the sheath tube from being broken when the implanting device is released.
Description
technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to an anti-break sheath with improved strength and a delivery system with the sheath. Background technique [0002] Interventional surgery causes little trauma to the human body and is less invasive. It is a medical technology that has been rapidly emerging and promoted in recent years. A channel is established between the lesion site and the external operation terminal to introduce diagnostic and therapeutic instruments, drugs, implanted devices, etc. to the lesion site. The interventional diagnosis and treatment sheath has a distal end and a proximal end. The distal end is loaded with therapeutic drugs and instruments and can enter the vascular system of the human body, and the proximal end is connected with an operating handle. When in use, the guide wire track is usually pre-established, and the distal end of the sheath tube or connected with other auxiliary...
Claims
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IPC IPC(8): A61M25/10A61B17/00
CPCA61B2017/00243A61M2025/0024A61M25/0052A61B17/3468A61M25/005A61M25/0074A61M39/08
Inventor 曾敏张志飞
Owner VENUS MEDTECH (HANGZHOU) INC