Pre-expander and matching structure of pre-expander and vascular sheath device

A technology of coordinating structure and pre-expanding device, which is applied in the direction of dilators, catheters, medical devices, etc., can solve the problems of head injury of surgical instruments, affect the normal use of surgical instruments, and large resistance, so as to achieve the effect of improving adaptability

Pending Publication Date: 2021-04-30
SHANGHAI HEALING MEDICAL DEVICES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is that when the existing surgical instrument passes through the head cap of the expansion tube, the resistance received is large, which is not convenient for the smooth passage of the surgical instrument, and is easy to cause damage to the head of the surgical instrument, affecting Normal use of surgical instruments

Method used

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  • Pre-expander and matching structure of pre-expander and vascular sheath device
  • Pre-expander and matching structure of pre-expander and vascular sheath device
  • Pre-expander and matching structure of pre-expander and vascular sheath device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0105] This embodiment provides a pre-spreader, such as Figure 13 As shown, the pre-expander includes a pre-expansion tube 31, and a second head 32 disposed on the far end of the pre-expansion tube 31, at least part of the outer diameter of the second head 32 is greater than that of the head cap of the expansion tube 1. The inner diameter of the distal end, the pre-expansion tube and the second head 32 are suitable for sliding in the expansion tube 1 to expand the head cap 14 of the expansion tube in the radial direction.

[0106] The pre-expander of this structure, because the outer diameter of at least part of the second head 32 is greater than the inner diameter of the distal end of the head cap 14 of the expansion tube 1, after the expansion tube 1 slides in place in the blood vessel, the pre-expander is used first. The pre-expansion tube and the second head 32 slide in the expansion tube 1, at least part of the second head 32 passes through the distal end of the head cap...

Embodiment 2

[0119] In this embodiment, a matching structure between a pre-expander and a vascular sheath device is provided, including the pre-expander and the vascular sheath device provided in Embodiment 1, such as Figure 1 to Figure 14 As shown, the vascular sheath device includes a housing 26 , a hemostatic valve 2 and a dilation tube 1 . Wherein, the hemostasis valve 2 is arranged on the opening of the proximal end of the housing 26 in a sealed manner; the proximal end of the expansion tube 1 is installed on the opening of the distal end of the housing 26 .

[0120] For example, if Figure 5a , Figure 5b and Figure 11 As shown, the above-mentioned locking part is a locking cap, and the outer wall surface of the opening at the far end of the housing 26 has external threads, the opening at the proximal end of the expansion tube is fixed with a fixing ring 28, and the distal end of the housing 26 is threaded with a lock Tight cap, the near end of fixing ring 28 is flared structure...

Embodiment 3

[0197] The embodiment of the present invention provides a matching structure of the pre-dilator and the vascular sheath device, which is different from the matching structure provided in Example 2 in that:

[0198]The structure of the expansion tube in the vascular sheath device is different. Specifically, the expansion tube does not include the installation part 12, but only includes the deformation part 11, and the deformation part 11 may be one, two, or more. When the deformation part 11 is one, the first end 111 and the second end 112 of the deformation part 11 form a closed loop. is stretched to change its bore diameter. When there are multiple deformed parts 11, the first end 111 of any two adjacent deformed parts 11 is connected to the second end 112 of another deformed part to form an annular pipe, and the expansion pipe is formed by deformed parts 11 along its circumference. , to further increase the radial deformation of the expansion tube.

[0199] As a modificati...

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Abstract

The invention discloses a pre-expander and a matching structure of the pre-expander and a vascular sheath device, the pre-expander comprises a pre-expanding tube and a second head arranged at the far end of the pre-expanding tube, the outer diameter of at least part of the second head is larger than the inner diameter of the far end of a head cap of the pre-expanding tube, and after the pre-expanding tube slides in place in a blood vessel, the pre-expanding tube of the pre-expander and the second head slide in the expanding tube, at least part of the second head penetrates through the far end of the head cap of the expanding tube, the head cap of the expanding tube is expanded in the radial direction, then the pre-expander is withdrawn from the expanding tube, and when the surgical instrument penetrates through the head cap of the expanding tube, radial acting force of the head cap on the surgical instrument is small, so that the surgical instrument penetrates through the head cap, and the head of the surgical instrument is protected.

Description

technical field [0001] The invention belongs to the technical field of medical instruments, and in particular relates to a pre-expander, a matching structure of the pre-expander and a vascular sheath device. Background technique [0002] As an auxiliary guiding device for arteriovenous interventional surgery, vascular sheaths play an important role in interventional therapy. Through the vascular puncture technique, the vascular sheath device is used to guide the vascular sheath device to expand the skin muscle tissue and enter the lumen of the epidermal blood vessel through the vascular puncture technique, and then the puncture guide wire is taken out so that the distal end of the vascular sheath device is placed in the blood vessel, thus establishing a A channel from the outside of the body to the lumen of a blood vessel for the passage of surgical instruments. For example, an artificial heart valve replacement operation generally uses an interventional valve, which requir...

Claims

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Application Information

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IPC IPC(8): A61M29/04A61M39/06A61M25/01
CPCA61M29/02A61M39/06A61M25/0194A61M2039/0626A61M2039/064A61M2039/0686A61M2210/12A61M2025/0197A61M2210/005
Inventor 陈晓黄韬刘冰冰林鹏张铭宇李阳王雪雪王银燕
Owner SHANGHAI HEALING MEDICAL DEVICES CO LTD
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