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Hardness-controlled intelligent conduit for clinical intervention treatment

An interventional therapy and catheter technology, applied in catheters, coatings, etc., can solve the problem of frequent replacement of catheters, and achieve the effect of small capital investment, obvious effect, and avoidance of detachment from the lesion site.

Inactive Publication Date: 2011-05-18
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide an intelligent catheter with adjustable hardness for clinical interventional therapy, to replace the single hardness catheter used in existing clinical interventional therapy, and effectively solve the problem of frequent replacement of catheters in interventional operations to adapt to different hardness required puzzle

Method used

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  • Hardness-controlled intelligent conduit for clinical intervention treatment
  • Hardness-controlled intelligent conduit for clinical intervention treatment
  • Hardness-controlled intelligent conduit for clinical intervention treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Laboratory Preparation of Smart Catheters

[0028] A commercially available 32 μm thick polyimide tube (inner diameter of 1.14mm, 0.045") was fixed on a thin metal round rod with the same inner diameter, and the outer surface of the polyimide tube was coated by electroless plating. After the surface is uniformly plated with about 25nm thick copper (resistance is 30Ω), the paraffin is dissolved in the organic solvent chloroform and then spin-coated on the outer surface of the polyimide tube coated with a metal layer. The thickness of the paraffin layer depends on the concentration of the paraffin organic solution. and spin-coating speed adjustment, spin-coat paraffin layers with a thickness of 124, 213, 314, and 425 μm in turn according to this method. After the solvent is completely evaporated, nest it into a polyimide tube with a larger inner diameter to obtain a smart catheter , carry out hardness test on Electroforce electromagnetic dynamic static dynamic testing mac...

Embodiment 2

[0032] Industrial Production of Smart Catheters

[0033]Appropriate modifications are made to the existing catheter process, that is, the outer tube, temperature-sensitive high molecular polymer and inner tube are co-extruded by composite extrusion, and the tube wall can be reinforced with metal wire or mesh. If an additional metal resistance layer is required, a thin layer of metal can be plated on the outer surface of the inner tube layer by electroless plating, and the time of electroless plating can be controlled to adjust the resistance.

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Abstract

The invention discloses a hardness-controlled intelligent conduit for clinical intervention treatment. The conduit comprises an external conduit (1) and an internal conduit (3); a main body has the conventional conduit structure; and a metal enhancement layer (2) is arranged on an outer wall of the internal conduit (3); a structure containing a temperature sensitive high polymer layer also can be adopted, and a metal resistive layer (5) is arranged on the outer wall of the internal conduit (3); and a temperature sensitive high polymer layer (4) is coated on the external conduit (1). By applying a voltage or current signal on the metal enhancement layer (2) or the metal resistive layer (5), a local thermal effect is generated, the temperature of the temperature sensitive high polymer layer is raised, and Young modulus (also called hardness) is reduced. After an electric signal is cut off, the temperature of the polymer layer can be continuously reduced, while the hardness of the conduit is gradually increased to reach the initial hardness. The hardness-controlled intelligent conduit can greatly reduce the cost of frequently replacing the conduit, reduces the difficulty and risk of an operation, and shortens the operation time.

Description

technical field [0001] The invention relates to an intelligent catheter, in particular to an intelligent catheter with adjustable hardness for clinical interventional treatment. technical background [0002] Intervention therapy is a minimally invasive treatment method developed internationally in recent years using modern high-tech means. Under the guidance of medical imaging equipment (digital X-ray machine, CT machine, nuclear magnetic resonance machine), it introduces special catheters, guide wires and other precision instruments into the patient's body to diagnose and locally treat the lesion in the body. Compared with traditional medical drug treatment and surgical treatment, interventional treatment has the characteristics of no surgery, less trauma, quicker recovery, and better effect. With the improvement of its technology, interventional therapy can now reach almost all vascular branches and other luminal structures (digestive tract, biliary tract, trachea, nasal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M25/00A61L29/14A61L29/08
Inventor 董华陈晓峰曹晓东
Owner SOUTH CHINA UNIV OF TECH
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