Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Microcatheter with head end capable of being eluted

A micro-catheter, catheter technology, applied in the direction of catheter, coating, etc., to achieve excellent biological safety, reduce psychological pressure, reduce the effect of surgical steps

Inactive Publication Date: 2019-08-27
SUZHOU HENGRUI HONGYUAN MEDICAL TECH CO LTD
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantage is similar to the Apollo microcatheter, in that they all retain a section of microcatheter about 5 cm long in the flow-carrying vessel

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Microcatheter with head end capable of being eluted
  • Microcatheter with head end capable of being eluted
  • Microcatheter with head end capable of being eluted

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as Figure 1-2 As shown, the head-end elutable microcatheter includes a microcatheter main body 1, a stress expansion tube 2 and a Luer connector 3; the microcatheter main body 1 is connected to one end of the stress expansion tube 2, and the other end of the stress expansion tube 2 is connected to The Luer connector 3 is connected; the surface of the microcatheter main body 1 is coated with a release coating.

[0034] The cross-sectional structure of the microcatheter main body 1 includes an inner layer 2-1, an intermediate layer 2-2 and an outer layer 2-3 from the inside to the outside; the material of the inner layer 2-1 is a PTFE catheter, and the middle layer 2-2 It is a metal lining wire layer of braided or coiled spring structure, and the material of the outer layer 2-3 is PEBAX catheter.

[0035] The PEBAX catheter in the outer layer 2-3 is welded by several sections of PEBAX materials with different hardness; wherein the distal end material is softer than...

Embodiment 2

[0038] 10g PVA (Airvol 523 U.S. air chemistry) heating is dissolved in 125g deionized water, then adds 5g Tween 80 and dissolves. Then add 1 g of 10% glutaraldehyde solution and the resulting solution can be directly used for coating after cooling. The coating adopts the pulling and dipping process. The distal end of the elutable microcatheter described in Example 1 is dipped 10 cm below the liquid surface. After dipping for 10 seconds, it is then lifted upwards at a speed of 10 mm / s. The distal end is completely clear of the liquid surface. Finally, after waiting for 30 seconds, transfer the microcatheter to an oven after the surface of the microcatheter is dry, and bake at 60 degrees for 2 hours.

[0039] With Onyx glue reflux embedding test, the withdrawal force is: 30±10gF (embedding length: 3cm).

[0040] The test method of withdrawal force is as follows:

[0041] (1) Soak the microcatheter in 37°C normal saline for 10 minutes;

[0042] (2) if image 3 Set the test l...

Embodiment 3

[0055] 10g PVP (K30 U.S. BASF) was heated and dissolved in 125g deionized water, and then 10g Proxamer 188 was added for dissolution. The resulting solution can be used directly for coating after cooling.

[0056] The coating adopts the pulling and dipping process. The distal end of the elutable microcatheter described in Example 1 is dipped 10 cm below the liquid surface. After dipping for 10 seconds, it is then lifted upwards at a speed of 20 mm / s. The distal end is completely clear of the liquid surface. Finally, after waiting for 30 seconds, transfer the microcatheter to an oven after the surface of the microcatheter is dry, and bake at 60 degrees for 2 hours.

[0057] According to the test method described in Example 1, with Onyx glue reflux embedding test, the withdrawal force is: 20 ± 10gF (embedding length 3cm).

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Lengthaaaaaaaaaa
Lengthaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention relates to a microcatheter with a head end capable of being eluted, and belongs to the technical field of medical instruments. The microcatheter comprises a microcatheter main body, a stress expansion tube and a Luer taper; the microcatheter main body is connected with one end of the stress expansion tube; the other end of the stress expansion tube is connected with the Luer taper; the surface of the microcatheter main body is coated with a release type coating. The microcatheter with the head end capable of being eluted provided by the invention can release surfactants or hydrophilic polymer substrates, thereby greatly reducing the adhesive force of a micelle formed by a liquid embolic agent to an embedded microcatheter, so that the microcatheter can be easily withdrawn fromthe micelle formed by the embedded liquid embolic agent. For a doctor, the risk of catheter withdrawl is greatly reduced, operating procedures are reduced, and mental pressure is reduced.

Description

technical field [0001] The invention relates to a head-end elutable microcatheter, which belongs to the technical field of medical instruments. Background technique [0002] Arteriovenous malformation (AVM) is a common congenital vascular disease in the brain, and its characteristics are shown in the figure below. The normal blood path should be arteries-capillaries-veins. However, AVM is equivalent to a malformed vascular mass formed by the short circuit of arteries and veins. Because of the loss of capillary function, blood pressure cannot be effectively lowered. Arterial hypertension leads directly to venous hypertension or rupture of the AVM vascular mass. [0003] The treatment of AVM mainly includes surgical resection, endovascular embolization and stereotactic radiation therapy. In recent years, with the advancement of embolic materials and techniques, the application of new liquid embolic agents (Onyx, Phil, etc.) through endovascular embolization has become an...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): A61L29/12A61L29/04A61L29/06A61L29/08A61L29/02A61M25/00
CPCA61L29/02A61L29/041A61L29/06A61L29/085A61M25/0045A61M2025/0047C08L27/18
Inventor 解荡黄飞飞
Owner SUZHOU HENGRUI HONGYUAN MEDICAL TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com