阅读说明：本技术 便于高效完整切割的活检针 (Biopsy needle convenient for efficient complete cutting ) 是由 吴伟 于 2020-04-10 设计创作，主要内容包括：本发明提供一种便于高效完整切割的活检针,包括实心针、空心套管、旋切套管。空心套管可旋转地套在实心针外部,实心针可操作地在空心套管内移动,空心套管的一端部被制作形成圆形刀片。旋切套管套在空心套管外部,旋切套管的端部具有多个由记忆合金制成的金属切片,所有的金属切片通过空心套管支撑胀开。使用时,活检针穿刺接近目标组织后,从空心套管内后退收回实心针,推进并旋转空心套管,使得空心套管端部的圆形刀片对组织进行切割而获得圆柱形组织样本,然后固定旋切套管并后退收回空心套管,以使旋切套管端部的所有金属切片在失去空心套管的支撑作用后基于记忆合金的属性自动合拢成锥状而将圆柱形组织样本切断,取样规则完整,切割效率高。(The invention provides a biopsy needle convenient for efficient and complete cutting, which comprises a solid needle, a hollow sleeve and a rotary cutting sleeve. A hollow cannula is rotatably received over the solid needle, the solid needle being operable to move within the hollow cannula, an end of the hollow cannula being formed with a circular blade. The rotary cutting sleeve is sleeved outside the hollow sleeve, the end part of the rotary cutting sleeve is provided with a plurality of metal slices made of memory alloy, and all the metal slices are supported and expanded by the hollow sleeve. When the biopsy needle is used, after the biopsy needle is punctured to approach a target tissue, the solid needle is retracted from the hollow sleeve in a retreating mode, the hollow sleeve is pushed and rotated, so that a circular blade at the end of the hollow sleeve cuts the tissue to obtain a cylindrical tissue sample, then the rotary-cut sleeve is fixed and retracted to retract the hollow sleeve in a retreating mode, so that all metal slices at the end of the rotary-cut sleeve are automatically folded into a conical shape based on the property of memory alloy after the supporting effect of the hollow sleeve is lost, the cylindrical tissue sample is cut off, the sampling is regular and complete, and the cutting efficiency is high.)

1. A biopsy needle for facilitating efficient complete cutting, comprising:

a solid needle;

a hollow cannula rotatably mounted externally of said solid needle and operatively movable within said hollow cannula, an end of one end of said hollow cannula being formed with a circular blade; when the needle is used, after the solid needle and the hollow sleeve integrally puncture to approach target tissues, the solid needle is retracted to be withdrawn from the hollow sleeve, and the hollow sleeve is pushed and rotated, so that the circular blade at the end part of the hollow sleeve cuts the tissues to obtain a cylindrical tissue sample.

2. The biopsy needle facilitating efficient complete cutting according to claim 1, wherein the biopsy needle facilitating efficient complete cutting comprises a rotary cut cannula, the rotary cut cannula is sleeved outside the hollow cannula, the end portion of the rotary cut cannula is provided with a plurality of metal slices made of memory alloy, and all the metal slices are expanded through the hollow cannula support; after the cylindrical tissue sample obtained by cutting enters the hollow sleeve, the rotary cutting sleeve is fixed and retreats to withdraw the hollow sleeve, so that all the metal slices at the end part of the rotary cutting sleeve are automatically folded based on the property of the memory alloy after the supporting function of the hollow sleeve is lost, and the cylindrical tissue sample is cut off.

3. The biopsy needle of claim 2, wherein all of the plurality of metal slices are arranged in a zigzag pattern around a central axis of the atherectomy cannula and along a rim of the atherectomy cannula.

4. The biopsy needle facilitating efficient complete cutting according to any one of claims 1 to 3, wherein the solid needle is a tri-edged needle.

5. The biopsy needle facilitating efficient complete cutting according to any one of claims 1-3, wherein the biopsy needle facilitating efficient complete cutting forms a snap fit operation with a handle.

6. The biopsy needle facilitating efficient complete cutting according to any one of claims 1 to 3, wherein the biopsy needle facilitating efficient complete cutting comprises a negative pressure device, wherein the negative pressure device is connected with the hollow cannula.

7. The biopsy needle facilitating efficient complete cutting according to claim 6, wherein the negative pressure device is a syringe.

Technical Field

The invention relates to a biopsy needle, in particular to a biopsy needle convenient for efficient and complete cutting.

Background

Biopsy needles are used to take biopsies of kidney, liver, breast, thyroid, prostate, pancreas, testis, uterus, and many other organs, as well as vertebral tumors and unidentified tumors, to aspirate cells. An existing biopsy needle generally comprises a hollow needle, a solid needle and a driving mechanism, wherein a cutting window is obliquely arranged at the front end of a needle body of the biopsy needle, and the solid needle is sleeved inside the hollow needle. In the actual sampling process, the hollow needle and the solid needle penetrate into the soft tissue together, the solid needle is still after reaching the sampled tissue, and the hollow needle continues to penetrate the soft tissue forwards and reaches the target position, and then the tissue sample is extracted in a vacuum adsorption mode. However, in the sampling process, a small amount of air always enters the surgical site, so that the vacuum degree of the whole biopsy needle system is low, and further, the amount of soft tissue entering a biopsy needle cutting window is small, and the sampling amount is small. And the soft tissue is extracted by adopting a tearing mode in the cutting process, the efficiency of cutting and sampling is low, and the sampling shape is irregular.

Disclosure of Invention

The invention aims to provide a biopsy needle convenient for efficient and complete cutting, which solves the problems of low vacuum degree and small sampling amount caused by the fact that a small amount of air enters an operation part in the sampling process of the existing biopsy needle, and the existing biopsy needle is low in cutting efficiency and irregular in sampling shape.

To solve the above problems, the present invention provides a biopsy needle facilitating efficient complete cutting, comprising a solid needle and a hollow cannula. The hollow cannula is rotatably mounted on the exterior of the solid needle and the solid needle is operatively movable within the hollow cannula, the end of one end of the hollow cannula being formed with a circular blade. When the solid needle and the hollow cannula integrally puncture to approach target tissues, the solid needle is retracted to withdraw the solid needle from the hollow cannula, and the hollow cannula is pushed forward and rotated, so that the circular blade at the end part of the hollow cannula cuts the tissues to obtain a cylindrical tissue sample.

According to one embodiment of the invention, the biopsy needle convenient for efficient and complete cutting comprises a rotary cutting sleeve, the rotary cutting sleeve is sleeved outside a hollow sleeve, the end part of the rotary cutting sleeve is provided with a plurality of metal slices made of memory alloy, and all the metal slices are supported and expanded by the hollow sleeve; after the cylindrical tissue sample obtained by cutting enters the hollow sleeve, the rotary cutting sleeve is fixed and retreats to withdraw the hollow sleeve, so that all metal slices at the end part of the rotary cutting sleeve are automatically folded based on the property of the memory alloy after the supporting function of the hollow sleeve is lost, and the cylindrical tissue sample is cut off.

According to one embodiment of the present invention, all of the metal slices encircle the central axis of the atherectomy cannula and are arranged in a zigzag pattern along the rim of the atherectomy cannula.

According to an embodiment of the present invention, the solid needle is a triangular needle.

According to an embodiment of the invention, the biopsy needle facilitating efficient complete cutting is in a snap fit operation with a handle.

According to one embodiment of the invention, the biopsy needle facilitating efficient complete cutting comprises a negative pressure device, wherein the negative pressure device is connected with the hollow sleeve.

According to one embodiment of the invention, the negative pressure device is a syringe.

Compared with the prior art, the technical scheme has the following advantages:

according to the invention, the hollow sleeve is sleeved outside the solid needle and can rotate, and the end part of the hollow sleeve is manufactured to form the circular blade, so that when the biopsy needle reaches a target position in operation, the solid needle can be withdrawn in sequence, and then the gap sleeve is pushed and rotated, so that the circular blade at the end part of the hollow sleeve cuts the assembly, and a cylindrical tissue sample is obtained. The front end of the traditional biopsy needle is provided with an inclined cutting window, and the front end of the hollow sleeve for cutting the tissue sample is manufactured to form the circular blade, so that the tissue sample with a regular shape can be cut, and the cutting window of the circular blade is circular, so that the circular blade is in closer contact with the tissue during cutting, air can be better prevented from entering an operation part, the vacuum degree of a biopsy needle system is ensured, the tissue can be better cut, the sampling amount is increased, and the sampling efficiency is improved.

According to the invention, the rotary-cut sleeve is sleeved outside the hollow sleeve, and the end part of the rotary-cut sleeve is provided with a plurality of metal slices made of memory alloy, so that after a cylindrical tissue sample obtained by cutting enters the hollow sleeve, the hollow sleeve is retracted by retreating, all the metal slices of the rotary-cut sleeve are automatically folded towards the central axis of the rotary-cut sleeve according to the characteristics of the memory property of the alloy after the supporting function of the hollow sleeve is lost, and the cylindrical tissue sample is cut off. The invention creatively utilizes the characteristics of the memory alloy to carry out secondary cutting, improves the efficiency of cutting and sampling and obtains the tissue sample with regular shape.

Drawings

FIG. 1 is a schematic structural view of a biopsy needle provided in an embodiment of the present invention;

FIG. 2 is a schematic structural view of a biopsy needle provided in accordance with an embodiment of the present invention after retraction of the hollow needle;

fig. 3 is a schematic structural view of a biopsy needle according to an embodiment of the present invention in a state where all the slices of the rotational-cut cannula are automatically closed after the biopsy needle is retracted back into the hollow cannula.

Detailed Description

The following description is only for the purpose of disclosing the invention so as to enable a person skilled in the art to practice the invention. The embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other arrangements without departing from the spirit and scope of the invention.

As shown in FIGS. 1-3, the present invention provides a biopsy needle that facilitates efficient complete cutting, comprising a solid needle 10 and a hollow cannula 20.

The solid needle 10 is a solid Mitsubishi needle, which is convenient for rapidly penetrating tissue to reach a target site during operation.

Hollow cannula 20 is rotatably mounted over the exterior of solid needle 10 and solid needle 10 is operatively movable within hollow cannula 20. That is, solid needle 10 is retractable along hollow cannula 20. The end of the hollow cannula 20 at one end is formed with a circular blade such that, after the solid needle 10 and the hollow cannula 20 are integrally penetrated close to the target tissue in use, the solid needle 10 is retreated to withdraw the solid needle 10 from the hollow cannula 20, and then the hollow cannula 20 is advanced and rotated so that the circular blade at the end of the hollow cannula 20 cuts the tissue, thereby obtaining a cylindrical tissue sample. It can be understood that, owing to adopt circular blade to carry out the rotary cutting to the tissue, not only can cut out the tissue sample of shape rule like this, circular blade's cutting window is circularly moreover, and circular blade is inseparabler with the tissue contact when the cutting, can avoid the air to get into the operation position better, guarantees the vacuum of biopsy needle system, and then can get off the tissue cutting better, increases the sample volume, improves sample efficiency.

Further, the biopsy needle facilitating efficient and complete cutting further comprises a rotary-cut sleeve 30, the rotary-cut sleeve 30 is sleeved outside the hollow sleeve 20, and the end of the rotary-cut sleeve 30 is provided with a plurality of metal slices 31 made of memory alloy. Alternatively, in this embodiment, all of the metal slices 31 surround the central axis of the atherectomy cannula 30 and are arranged along the edge of the atherectomy cannula 30 in a zigzag pattern. All the metal slices 31 are supported and expanded by the hollow sleeve 20, namely, the metal slices 31 are attached to the outer wall of the hollow sleeve 20, and the hollow sleeve 20 supports the metal slices 31, so that all the metal slices 31 are in an expanded state. However, due to the memory property of the metal slices 31, all the metal slices 31 also have a closed state, i.e., after the hollow cannula 20 and the metal slices 31 are separated, all the metal slices 31 will automatically close to the central axis of the rotary-cut cannula 30 to form a cone shape after losing the supporting function of the hollow cannula 20.

In operation, after the cylindrical tissue sample obtained by cutting enters the hollow cannula 20, the rotary-cut cannula 30 is fixed and retracted to retract the hollow cannula 20, so that all the metal slices 31 at the end of the rotary-cut cannula 30 automatically close into a cone shape based on the property of the memory alloy after losing the supporting function of the hollow cannula 30, and the cylindrical tissue sample entering the hollow cannula 20 is cut off. Compared with the traditional technology that the soft tissue is extracted by tearing, the invention adopts the rotary cutting sleeve 30 to cut the tissue, which can obviously improve the cutting efficiency, improve the integrity of the sampled tissue and improve the accuracy of detection.

The biopsy needle, which facilitates efficient complete cutting, comprises a negative pressure device (not shown in the figures) which is connected to the hollow cannula 20. The negative pressure device may be a syringe or other device that generates negative pressure suction. When the hollow sleeve 20 rotates to cut the tissue, the negative pressure device is adopted to suck the hollow sleeve 20, so that the hollow sleeve 20 can better collect the cut tissue sample, and more cylindrical tissues entering the hollow sleeve 20 are ensured. Further, for a suspended living tissue in a tissue like a bladder, the suspended living tissue can be attracted to the hollow sleeve 20 with the aid of an endoscope by means of a negative pressure device.

In practical application, the whole biopsy needle convenient for efficient and complete cutting forms a blocking matching operation through a handle, so that the biopsy needle is more convenient and faster.

In conclusion, the biopsy needle convenient for efficient and complete cutting provided by the invention has the advantages of simple structure, simplicity in operation, convenience in sampling various living tissues and regular sampling shape. After the whole biopsy needle formed by mutually connecting and matching the solid needle 10, the hollow sleeve 20 and the rotary cutting sleeve 30 is inserted into a body, the hollow sleeve 20 is rotated to cut the living tissue in a circular manner, and a cylindrical sample is collected by utilizing the hollow sleeve 20, so that the sampling rule is regular, and the sampling integrity is improved; the multiple metal slices 31 of the rotary-cut sleeve 30 can increase the cutting efficiency twice, and the sampling integrity is improved doubly. Compared with the traditional technology, the biopsy needle provided by the invention can facilitate efficient and complete cutting, and can increase the tissue sampling amount.

It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and the embodiments of the present invention may be subject to any changes or modifications without departing from the principles.