A dual lumen particle implant needle

Abstract

The present application relates to the field of medical devices, and discloses a double-cavity particle implantation needle, which comprises an outer needle tube and an inner push needle, the outer needle tube is provided with an implantation cavity which penetrates through in the axial direction, and an auxiliary cavity is further arranged in the tube wall of the outer needle tube, the auxiliary cavity is provided with an opening at one end away from the outer needle tip, and the auxiliary cavity is communicated with the implantation cavity at the position of the outer needle tip or the position close to the outer needle tip. The double-cavity particle implantation needle with the above structure can timely discharge the air in the implantation cavity during the implantation process, avoid the air from being hit into the tissue to cause the problems of inaccurate particle implantation position and particle gathering, and can timely find the bleeding condition and perform timely hemostasis treatment, thereby improving the safety and efficiency of particle implantation, and avoiding the problems of significant decrease in efficiency and excessive radiation of doctors caused by bleeding to wash out the particles during the particle implantation process.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical devices, in particular to a double-cavity particle implantation needle. BACKGROUND

[0002] Tumors are a serious disease that endangers human health, with a very high mortality rate. Radioactive particle implantation needles are widely used in the prevention and treatment stages of tumor diseases. During operation, radioactive particles are accurately implanted into tumors through a stereotactic system, and continuous, short-range radiation from a miniature radioactive source causes maximum damage to tumor tissue, while leaving normal tissue undamaged or only minimally damaged.

[0003] The particle implantation needle disclosed in the patent application with publication number CN109011129A includes an outer needle tube and an inner push needle. The inner push needle can be inserted into the outer needle tube and can slide back and forth along the outer needle tube. The front end of the outer needle tube is an outer needle tip, and the end of the inner push needle away from the outer needle tip is provided with a hand pushing part. Although this particle implantation needle can successfully implant particles into a specific part of the human body, it still has the following problems:

[0004] 1. Since the lumen of the outer needle tube is only open at both ends, when the inner push needle pushes the particles, the air in the lumen of the outer needle tube is compressed, causing the pressure to increase, which can make it difficult to implant the particles.

[0005] 2. Even if the particles are eventually implanted, the air pushed into the human body will cause the implanted particles to accumulate together, and the implanted particles are not accurate enough, which will affect the treatment effect.

[0006] 3. The air pushed into the human body will cause greater trauma to the internal tissues of the patient, and the side effects are very obvious.

[0007] 4. During the process of inserting the outer needle tube, implanting the particles, and pulling out the outer needle tube, the outer needle tip may puncture blood vessels or injure other tissues, causing bleeding to occur. However, the current particle implantation needle cannot directly detect such accidental bleeding without pulling out the particle implantation needle, thereby increasing the risk of surgery. SUMMARY

[0008] The technical problem to be solved by the present application is to solve the technical defects in the prior art that the particle implantation needle has a high pressure in the lumen of the outer needle tube during the implantation of particles, which makes it difficult to implant the particles, the implantation of particles at the same time pushes in air, which causes low implantation accuracy and greater trauma, and cannot directly detect accidental bleeding.

[0009] In order to solve the above technical problems, the technical scheme provided by the present application is as follows: a double-cavity particle implantation needle comprises an outer needle tube and an inner push needle, one end of the outer needle tube is provided with an outer needle tip, the outer needle tube is provided with an implantation cavity which is axially through and accommodates the inner push needle to go in and out, an auxiliary cavity is further arranged in the tube wall of the outer needle tube, the auxiliary cavity extends axially from the end face of the tube wall of the outer needle tube away from the outer needle tip to the position where the outer needle tip is located or the position close to the outer needle tip, the auxiliary cavity is provided with an opening at the end away from the outer needle tip, the auxiliary cavity is communicated with the implantation cavity at the position where the outer needle tip is located or the position close to the outer needle tip, and the auxiliary cavity is provided with a second channel which is communicated with the outside at the position where the outer needle tip is located or the position close to the outer needle tip.

[0010] In a preferred embodiment, at least one first channel is arranged between the auxiliary cavity and the implantation cavity.

[0011] In a preferred embodiment, the first channel is a through hole or a through groove.

[0012] In a preferred embodiment, the second channel is at least one through hole or through groove.

[0013] In a preferred embodiment, the auxiliary cavity is arranged around the implantation cavity.

[0014] In a preferred embodiment, the implantation cavity is provided with a cavity wall, and a plurality of ribs are uniformly arranged in the circumferential direction between the outer wall of the cavity wall and the inner cavity wall of the auxiliary cavity.

[0015] In a preferred embodiment, the double-cavity particle implantation needle further comprises a medicine injection barrel which is communicated with the opening, and the medicine injection barrel is provided with a medicine injection port.

[0016] In a preferred embodiment, one end of the inner push needle is provided with an inner needle tip, and the other end of the inner push needle is provided with a hand pushing part.

[0017] In a preferred embodiment, an operating surface is arranged on the hand pushing part, and the operating surface is provided with a damping structure.

[0018] In a preferred embodiment, a hand holding part is arranged on the outer needle tube.

[0019] Compared with the prior art, the double-cavity particle implantation needle of the present embodiment has the following beneficial effects:

[0020] (1) The auxiliary cavity which is communicated with the implantation cavity is arranged, in the process of implanting particles, the inner push needle pushes the particles to move in the body in the implantation cavity, the gas in front of the particles in the implantation cavity is discharged through the auxiliary cavity, so that the pressure in the implantation cavity is consistent with the outside, the particles are implanted under normal pressure, and the particles are not accumulated, so that the particles can be accurately and smoothly implanted into the target position.

[0021] (2) Since the gas in the implant cavity can be smoothly discharged from the auxiliary cavity and will not be hit into the tissue together with the particles, the trauma to the internal tissue of the patient is minimized, and the side effects are greatly reduced.

[0022] (3) The auxiliary cavity is provided with a second channel in communication with the outside at the position of the outer needle tip or near the outer needle tip. In the puncture process, if the blood vessel is punctured or the tissue is injured to cause bleeding, the blood will flow into the auxiliary cavity from the second channel and flow out of the opening of the auxiliary cavity. Without pulling out the implant needle, it can be known whether the blood vessel is punctured and the bleeding condition, and whether the blood vessel is punctured in the puncture path can be known. The doctor can timely find the bleeding condition and timely treat it, thereby increasing the safety and reducing the operation risk.

[0023] (4) When the doctor finds the bleeding condition, the hemostatic and coagulation drugs can be injected from the opening of the auxiliary cavity without pulling out the double-cavity particle implant needle. The drugs reach the bleeding position from the auxiliary cavity and the second channel, the hemostasis is more timely, the bleeding amount is reduced, the particle implantation and the hemostatic treatment are simultaneously performed, the safety and efficiency of the implanted particles are improved, and the pain of the patient is alleviated.

[0024] (5) The timely discovery of the bleeding condition and the timely hemostatic treatment can effectively avoid the problems of significant decrease in efficiency and multiple radiation of the doctor caused by the bleeding of the particles during the particle implantation. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a schematic diagram of the perspective structure of the double-cavity particle implant needle shown in the embodiment;

[0026] Figure 2 It is a schematic diagram of the partial perspective structure of the outer needle tube near the outer needle tip of the double-cavity particle implant needle shown in the embodiment;

[0027] Figure 3 It is a schematic diagram of the perspective structure of the double-cavity particle implant needle shown in the embodiment;

[0028] Figure 4 It is a sectional view of the double-cavity particle implant needle shown in the embodiment;

[0029] Figure 5 It is Figure 4 a partial enlarged view I;

[0030] Figure 6 It is Figure 4 a partial enlarged view II;

[0031] Figure 7 It is a front view of the double-cavity particle implant needle shown in the embodiment;

[0032] Figure 8 It isFigure 7 The AA section view is shown.

[0033] In the figure: 1. Outer needle tube, 2. Inner push needle, 3. Cavity wall, 4. Injection port, 5. Implantation cavity, 6. Auxiliary cavity, 7. Outer needle tip, 8. First channel, 9. Second channel, 10. Opening, 11. Damping structure, 12. Rib, 13. Injection tube, 14. Injection cavity, 15. Handhold, 16. Inner needle tip, 17. Hand push part, 18. Operating surface. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0035] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0036] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an integral connection, or a detachable connection; they can refer to the internal connection of two components; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0037] like Figures 1-8 As shown, a dual-cavity particle implantation needle of this embodiment includes an outer needle tube 1 and an inner push needle 2. One end of the outer needle tube 1 is provided with an outer needle tip 7. The outer needle tube 1 is provided with an implantation cavity 5 that is axially through and accommodates the inner push needle to enter and exit.

[0038] As a special feature of this embodiment, an auxiliary cavity 6 is further provided within the wall of the outer needle tube 1. The auxiliary cavity 6 extends axially from the end face of the outer needle tube 1 away from the outer needle tip 7 to the location of the outer needle tip 7 or near the outer needle tip. The auxiliary cavity 6 has an opening 10 at the end away from the outer needle tip. Preferably, the auxiliary cavity can be arranged parallel to the implantation cavity 5.

[0039] Preferably, in this embodiment, the auxiliary cavity 6 is an annular cavity, surrounding the cavity wall 3 of the implantation cavity 5. Furthermore, to increase the rigidity of the outer needle tube, as shown... Figure 8As shown, the outer wall of the cavity wall 3 and the inner cavity wall of the auxiliary cavity 6 are uniformly distributed with a plurality of ribs 12 in the circumferential direction, which connects the two as a whole, so that the outer needle tube has greater rigidity.

[0040] As a particularity of the embodiment, the auxiliary cavity 6 communicates with the implant cavity 5 at the position of the outer needle tip 7 or near the outer needle tip 7. Specifically to this embodiment, as shown in Figure 4 、 Figure 5 As shown, a plurality of first channels 8 are provided between the auxiliary cavity and the implant cavity. As a preferred, the first channel 8 is a through hole or a through groove, which penetrates the cavity wall 3 radially.

[0041] The double-cavity particle implantation needle with the above structure can make the air in the implant cavity 5 enter the auxiliary cavity 6 from the first channel 8 and then be discharged from the opening 10 when the inner push needle 2 pushes the particles, so that the pressure in the implant cavity is consistent with the outside, and the particles can be implanted into the target position accurately and smoothly under normal pressure without causing particle accumulation. In addition, since the gas in the implant cavity can be smoothly discharged from the auxiliary cavity, it will not be punched into the tissue together with the particles, minimizing the trauma to the patient's internal tissue and greatly reducing the side effects.

[0042] As a particularity of the embodiment, the auxiliary cavity 6 is provided with a second channel 9 communicating with the outside at the position of the outer needle tip 7 or near the outer needle tip 7, which is preferably a plurality of through holes or through grooves penetrating the outer wall of the auxiliary cavity 6. In this embodiment, the purpose of providing the second channel 9 at the position of the outer needle tip or near the outer needle tip is to allow blood to flow into the auxiliary cavity from the second channel and flow out of the opening of the auxiliary cavity when the double-cavity particle implantation needle is punctured, such as when a blood vessel is punctured or tissue is injured to cause bleeding. This can quickly discharge the blood outside the body, avoid blood retention in the body causing infection and delaying patient recovery, and allow doctors to discover the bleeding situation in time and handle it in time, thereby reducing the risk of surgery.

[0043] The particularity of the double-cavity particle implantation needle of this embodiment is that when the doctor discovers the bleeding situation, he can inject hemostatic and coagulation drugs from the opening of the auxiliary cavity without pulling out the double-cavity particle implantation needle, so that the drugs reach the bleeding position from the auxiliary cavity and the second channel, thereby realizing simultaneous particle implantation and hemostatic treatment, improving the efficiency of the operation and alleviating the pain of the patient.

[0044] As a special feature of the present embodiment, a medicine injection barrel 13 is further provided in communication with the opening 10. The medicine injection barrel 13 has an inner medicine injection cavity 14 in communication with the opening 10. The medicine injection barrel 13 is provided with a medicine injection port 4. Preferably, the medicine injection port 4 is located at an end away from the opening 10. The medicine injection barrel 13 increases the space for injecting medicine and is more convenient to operate. The medicine injection barrel 13 is further provided with a medicine injection port to communicate the opening, the medicine injection cavity and the outside.

[0045] In the present embodiment, in order to facilitate observation of bleeding, at least a portion of the outer wall of the medicine injection barrel 13 or the auxiliary cavity 6 is made of transparent material.

[0046] In the present embodiment, as shown in Figure 1 , Figure 4 , Figure 6 and Figure 7 , the outer needle tube 1 is provided with a hand holding portion 15 on the outer side. The hand holding portion 15 has a ring structure and a T-shaped cross-sectional profile. The inner push needle 2 is adapted to be inserted into the implant cavity 5 and is slidable in the implant cavity 5. The inner push needle 2 is provided with an inner needle tip 16 at one end and a hand pushing portion 17 at the other end. The hand holding portion 15 and the hand pushing portion 17 cooperate to make the operation more convenient.

[0047] Preferably, in the present embodiment, the hand pushing portion 17 is provided with a pair of symmetrical operation surfaces 18. In order to increase the damping, the operation surfaces 18 are provided with damping structures 11. The damping structures 11 can be any damping structure in the prior art, such as a pattern structure, a concave-convex structure, etc., to increase the friction of the operation surface and prevent slipping when the doctor operates.

[0048] The working principle of the double-cavity particle implantation needle of the present embodiment is as follows: the operator inserts the particles into the implant cavity 5 and inserts the inner push needle 2, at which time attention should be paid to the fact that there is no air between the particles and the inner push needle 2. Then one hand holds the hand holding portion 15 and the other hand holds the outer needle tube 1 to pierce the patient's skin with the outer needle tip 7. Under the guidance of the imaging device, the outer needle tube 1 is continuously pushed until the desired implantation site. The hand pushing the outer needle tube 1 releases the outer needle tube 1 and holds the hand pushing portion 17 to start pushing the inner push needle 2. The inner push needle 2 pushes the particles to move towards the implantation site. At this time, the air in the implant cavity 5 is compressed into the auxiliary cavity 6 through the first channel 8 and then discharged from the medicine injection port 4 through the opening 20 and the medicine injection cavity 14. When blood is found to be discharged, the blood is first sucked away and then hemostatic agent is immediately injected into the medicine injection cavity 14 from the medicine injection port 4. The hemostatic agent can be accurately injected into the bleeding point from the second channel 9.

[0049] As described above, the present application provides a double-cavity particle implantation needle, an auxiliary cavity is additionally arranged outside the implantation cavity, and a first channel is arranged to connect the implantation cavity and the auxiliary cavity. During the process of pushing the inner needle into the particles, the air left in the implantation cavity can enter the auxiliary cavity from the first channel and then be discharged from the opening. The situation that the air in the implantation cavity is compressed to increase the pressure and hinder the implantation of the particles is avoided. The particles implanted successfully will not be stacked together, the implanted particles are more uniform, and the implanted site is more accurate. The air in the implantation cavity will not be punched into the human tissue, the trauma to the internal tissue of the patient is minimized, and the side effects are greatly reduced. The second channel is arranged on the outer needle tube to connect the auxiliary cavity with the outside. When the tissue at the implantation site is wounded and bleeds, the blood can enter the auxiliary cavity from the second channel and then be discharged from the opening. That is, the tissue bleeding can be found and the blood can be immediately discharged to effectively avoid the blood retention inside to cause infection and delay the recovery of the patient. The drug liquid such as hemostatic agent injected into the auxiliary cavity from the opening can also be accurately injected into the bleeding point through the second channel, and the implantation of the particles can be performed at the same time to perform the treatment such as hemostasis. The drug injection barrel is arranged to increase the space for injecting the drug and make the operation more convenient. The drug injection port is arranged on the drug injection barrel to connect the opening, the drug injection cavity and the outside. The hand holding part and the hand pushing part are arranged, and the operation surface structure with patterns is arranged on the hand pushing part to make the operation more convenient. The structure of the whole implantation needle is relatively simple and easy to manufacture, and the manufacturing cost is as low as possible.

[0050] In summary, the above only describes the preferred embodiments of the present application and is not used to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A double lumen particle implantation needle comprising an outer needle tube (1) and an inner push needle (2), one end of the outer needle tube is provided with an outer needle tip (7), the outer needle tube is provided with an implantation lumen (5) which penetrates axially and accommodates the inner push needle to go in and out, characterized in that, An auxiliary cavity (6) is further arranged in the tube wall of the outer needle tube, the auxiliary cavity (6) extends axially from the end face of the outer needle tube away from the outer needle tip to the position of the outer needle tip or the position close to the outer needle tip, the auxiliary cavity is provided with an opening (10) at the end away from the outer needle tip, the auxiliary cavity communicates with the implant cavity at the position of the outer needle tip or the position close to the outer needle tip, at least one first channel (8) is arranged between the auxiliary cavity and the implant cavity, and the auxiliary cavity is provided with a second channel (9) communicating with the outside at the position of the outer needle tip or the position close to the outer needle tip.

2. The dual lumen particle implant needle of claim 1, wherein, The first channel is a through hole or a through groove.

3. The dual lumen particle implant needle of claim 1, wherein, The second channel is at least one through hole or a through groove.

4. The dual lumen particle implant needle of any of claims 1-3, wherein, The auxiliary cavity is arranged around the implant cavity.

5. The dual lumen particle implant needle of claim 4, wherein, The implant cavity is provided with a cavity wall (3), and a plurality of ribs (12) are uniformly arranged between the outer wall of the cavity wall and the inner cavity wall of the auxiliary cavity in the circumferential direction.

6. The dual lumen particle implant needle of any of claims 1-3 or 5, wherein, A medicine injection barrel (13) communicating with the opening (10) is further included, and the medicine injection barrel (13) is provided with a medicine injection port (4).

7. The dual lumen particle implant needle of claim 6, wherein, One end of the inner push needle (2) is provided with an inner needle tip (16), and the other end of the inner push needle (2) is provided with a hand pushing part (17).

8. The dual lumen particle implant needle of claim 7, wherein, An operation surface (18) is arranged on the hand pushing part (17), and the operation surface (18) is provided with a damping structure (11).

9. The dual lumen particle implant needle of any of claims 1-3 or 5 or 7-8, wherein, A hand holding part (15) is arranged on the outer needle tube (1).

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