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Intravascular memory metal puncture needle and application method thereof

A memory metal and puncture needle technology, which is applied in the field of memory metal puncture needles in blood vessels, can solve the problems of difficulty, inability to pass through, and uneven wall thickness, and achieve good effect, good passability, and improved strength and hardness.

Active Publication Date: 2019-03-29
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 is different, 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 puncture head of the catheter are extremely high, and it is impossible to pass through such a long blood vessel environment if you are not careful.

Method used

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  • Intravascular memory metal puncture needle and application method thereof
  • Intravascular memory metal puncture needle and application method thereof
  • Intravascular memory metal puncture needle and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A metal puncture needle with intravascular memory, such as figure 1 , 4 As shown in -5, the puncture needle includes a split-valve structure 1 that can be opened and closed and a metal helical tube 2 with a cavity inside. Both the split-petal structure 1 and the metal helical tube 2 are made of memory metal, and the memory Metals include, but are not limited to, nickel-titanium alloys, copper-nickel alloys, copper-aluminum alloys, copper-zinc alloys, and the like.

[0047] like Figure 2-3 As shown, the split-petal structure 1 is composed of a plurality of conical petals 100, and the conical petals 100 can be completely the same 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 closed, such as attached image 3 As shown, the petal-shaped structure is a cone-shaped structure, that is, a needle-shaped structure with a large diam...

Embodiment 2

[0066] On the basis of Example 1, such as Figure 8-9As 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.

[0067] 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 th...

Embodiment 3

[0069] 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.

[0070] 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.

[0071] 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 needle and an application method thereof. The puncture needle includes a split petal-shaped structure capable of opening and closing anda hollow metal spiral pipe containing multiple spiral rings; the split petal-shaped structure and the metal spiral pipe are made of memory metals; the split petal-shaped structure is composed of multiple conical petals. When the temperature is T1, the screw pitch between two adjacent spiral rings in the metal spiral pipe decreases, and all the conical petals in the split petal-shaped structure are closed; when the temperature is T0, the screw pitch between two adjacent spiral rings in the metal spiral pipe increases, and all the conical petals in the split petal-shaped structure are open. Thepuncture needle achieves synergistic effect by cooperating the metal spiral pipe with the split petal-shaped structure, not only can walk well in blood vessel, but also punctures blood vessel walls accurately, and realizes effective sampling for biopsy.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to an intravascular memory metal puncture needle 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 Applications(China)
IPC IPC(8): A61B10/02A61B17/34
CPCA61B10/0283A61B17/34A61B17/3417A61B2017/00867A61B2017/00778A61B2017/3454Y02A50/30
Inventor 尚华
Owner 尚华