Metal wire tool for minimally invasive cutting of biological soft tissues

A biological soft tissue and metal wire technology, applied in the field of soft matter and experimental mechanics, can solve the problems of difficulty in obtaining accurate geometric samples, cumbersome operation, limited effect, etc., achieving easy production and promotion, simple production method, and reduced adhesion Effect

Inactive Publication Date: 2015-05-20
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, due to the existence of adhesive force, the sample will have a large deformation during the cutting process, and it is difficult to obtain samples with precise geometric dimensions
Wetting the mold with saline before cutting or spraying saline during cutting can reduce the adhesion between the sample and the mold to a certain extent, but this method has limited effect, poor controllability, and cumbersome operation

Method used

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  • Metal wire tool for minimally invasive cutting of biological soft tissues
  • Metal wire tool for minimally invasive cutting of biological soft tissues
  • Metal wire tool for minimally invasive cutting of biological soft tissues

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: Micro-nano texturing method on the surface of molybdenum wire:

[0028] (1) Put molybdenum wire (length: 10cm, diameter: 80μm) into FeCl 3 In etchant (FeCl 3 with H 2 The mass ratio of O is 4:15, and HCl, H 3 PO 4 、H 2 o 2 , its volume ratio to water is 2:2:2:15), etched at room temperature for 5 min.

[0029] (2) Take out the molybdenum wire and ultrasonically clean it with anhydrous ethanol for 30 s to clean the residue on the surface of the molybdenum wire and dry it in the air.

[0030] (3) Scanning electron microscope (SEM) was used to observe the surface morphology of molybdenum wire before and after etching, see attached image 3 .

[0031] (4) Measured by a contact angle measuring instrument, by adjusting the microneedle to drop 2 μl water drop on the molybdenum wire, and measure the static contact angle of the water drop on the surface of the molybdenum wire before and after etching. The static contact angle before etching is 125°; after ...

Embodiment 2

[0033] (1) Put a pair of red steel paper gaskets 3 and bolts 4 in the left and right small holes of the bow-shaped clip 2, slightly tighten the nut 5, and place the etched molybdenum wire 6 between the left and right rubber gaskets 3 and the upper ends of the bolts 4 Make a circle around and continue to screw the nut 5. Turn the nut 5 to tighten the molybdenum wire 6, and use cyanoacrylate to glue the bow clip 2 with the molybdenum wire 6 installed on the appropriate position of the handle 1. The assembled molybdenum wire cutter head is placed on the front end of the medical reciprocating saw 7, and the whole cutter is fixed on the sliding guide rail 15.

[0034] (2) Place the fresh sheep brain tissue sample 8 on the center of the circular platform 9, turn on the medical reciprocating saw 7 with an amplitude of 3 mm and a frequency of 30 Hz, drive the molybdenum wire cutter to perform reciprocating linear motion, and control the medical reciprocating saw 7 along the sliding gu...

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Abstract

The invention belongs to the technical fields of soft materials and experimental mechanics, and discloses a metal wire tool for minimally invasive cutting of biological soft tissues. The tool comprises a metal wire cutter and a vibration device, wherein a metal wire is subjected to surface etching through a chemical method and has a proper micro-nano texture; by combination with a reciprocating linear motion cutting mode provided by the vibration device, the adhesive power between the biological soft tissues and the tool can be effectively reduced when the biological soft tissues are cut; the to-be-exerted cutting force is reduced; the destructive effects on soft tissues in the cutting process are reduced; minimally invasive cutting is achieved; a sample with a precise physical dimension can be obtained by cutting; and the cut sample can relatively really reflect the mechanical property of the biological soft tissues. The tool is simple in manufacturing method, convenient and fast to operate, low in cost and convenient to produce and popularize.

Description

technical field [0001] The invention belongs to the technical field of soft matter and experimental mechanics, relates to biological soft tissue cutting, in particular to a wire cutter for minimally invasive cutting of biological soft tissue. Background technique [0002] Many accidents such as bumps, falls, and car accidents in daily life may cause varying degrees of trauma or even life-threatening to human tissues and organs (such as brain, liver, kidney, etc.). In order to develop effective and reliable prediction methods and protective measures, it is necessary to Accurately test the mechanical properties of human soft tissue, establish a suitable mechanical model, and provide reference data for experimental verification and numerical simulation. In addition, obtaining accurate mechanical properties of human soft tissues has important practical guiding significance for medical diagnosis and surgical planning. Since the mechanical properties of some soft tissue organs su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/08
Inventor 张伟冯亮亮吴樊马建立马国军吴承伟
Owner DALIAN UNIV OF TECH
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