An intravascular memory metal puncture system and its application method

A memory metal and blood vessel technology, which is applied in the field of medical devices, can solve the problems of inability to pierce, vary in thickness, and inability to pass through, and achieve the effects of convenient biopsy sampling, improved strength and hardness, and good passability

Active Publication Date: 2019-10-22
尚华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the method of sampling through blood vessels into tumor tissue seems simple, it is actually extremely difficult. This is because the tumor in the body has a certain depth. If you want to go through blood vessels to reach the tumor, you need to go through one or two meters. The length of the blood vessel, and the thickness of the blood vessel is different, the thickness of the wall is different, and the environment inside the blood vessel is complicated. Therefore, the requirements for the head and trunk of the puncture system are extremely high, and it is impossible to pass through such a Long vascular environment or inability to penetrate the inner wall of tumor vessels into the tumor

Method used

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  • An intravascular memory metal puncture system and its application method
  • An intravascular memory metal puncture system and its application method
  • An intravascular memory metal puncture system and its application method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] An intravascular memory metal puncture system, such as Figure 1-2 As shown, the puncture system includes a hollow guide tube and a head, and the guide tube is a helical structure made of metal containing a plurality of helical turns.

[0047] Such as image 3 As shown, the head includes a split-valve structure 1 that can be opened and closed and a metal spiral tube 2 with a cavity inside. Both the split-petal structure 1 and the metal spiral tube 2 are made of memory metal, and the memory metal includes but not Limited to nickel-titanium alloys, copper-nickel alloys, copper-aluminum alloys, copper-zinc alloys, etc.

[0048] Such as Figure 3-5 As shown, the split-petal structure 1 is composed of a plurality of conical petals 100, and the conical petals 100 can be identical multi-lobed conical petals, or they can be different, but whether they are the same or not, the split-petals Structure 1 will have the following structural features: when each conical valve is clo...

Embodiment 2

[0073] On the basis of Example 1, such as Figure 12-13 As shown, in the conical petal 100, the side for abutting or separating from the adjacent conical petal is a slope 105, that is, a conical petal 100 has two sides, and each side is a bevel structure. And the directions of the slopes 105 in all the conical petals 100 are consistent, that is, in the same clockwise or counterclockwise direction, which ensures that the two inclined surfaces that are adjacent to each other in the two adjacent conical petals can be exactly matched together, That is, one is gradually inclined from the inside to the outside, and the other is inclined from the outside to the inside, then the two can be fitted together just so that the inner surface and the outer surface are smooth arc surfaces after being combined together.

[0074] It is designed as a slope structure, which is equivalent to widening the width of the side, so that the contact area between two adjacent conical petals increases when...

Embodiment 3

[0076] On the basis of Embodiment 1 or 2, in the conical petals 100, a first flexible layer is provided on the side or inclined surface 105 that abuts or separates from the adjacent conical petals to make the connection between the conical petals 100 Higher strength, better sealing, better sealing can prolong the time of the needle or cone structure, thus making biopsy sampling more convenient.

[0077] As a further preferred embodiment, the inner surface of the tip of the conical petal is provided with a second flexible layer so that when the petal-shaped structure is closed, the abutment force between the conical petals is higher and the sealing performance is better. When the valve-shaped structure passes through the interventional guide wire, its bonding force with the interventional guide wire is enhanced, and the integrity is good to increase the operation effect.

[0078] The thickness of the first flexible layer and the second flexible layer may be 0.005-0.04 mm, and t...

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Abstract

The invention relates to an intravascular memory metal puncture system and an application method thereof. The intravascular memory metal puncture system comprises a hollow guide pipe and a head part,the guide pipe is of a spiral structure which is made of metal and contains a plurality of spiral rings, the head part comprises a split-shaped structure capable of being opened and closed and a hollow metal spiral tube containing a plurality of spiral rings, the split-shaped structure and the metal spiral tube are all made of memory metal, and the split-shaped structure is composed of a pluralityof conical valves. When the temperature is T1, the screw pitch between every two adjacent spiral rings in the metal spiral tube is reduced, and the conical valves in the split-shaped structure are switched off. When the temperature is T0, the screw pitch between every two adjacent spiral rings in the metal spiral tube is increased, and the conical valves in the split-shaped structure are switchedon. All the components in a puncture needle assembly have a synergistic effect so that the system can walk well in blood vessels, accurate puncture of blood vessel walls can be realized, and effective sampling can be achieved for biopsy.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to an intravascular memory metal puncture system and an application method thereof. Background technique [0002] With the continuous improvement of examination methods and methods, the correct rate of tumor diagnosis has gradually increased, but there are still a large part of tumors that do not have typical imaging features, making diagnosis difficult. A correct diagnosis requires a combination of clinical, imaging, and pathological factors. Among them, pathological diagnosis plays a key role in the selection of treatment options. Biopsy is the main way to obtain pathological diagnosis. Needling biopsy (needling biopsy, also known as needle biopsy puncture biopsy) method extracts tumor cells from the body for analysis. Its advantages are: the method is simple, it can be performed in an outpatient clinic under local anesthesia, and the success rate of needle biopsy can b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B10/02A61B17/34
Inventor 尚华
Owner 尚华
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