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
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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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