CN219461229U

CN219461229U - Biopsy needle for lung ablation

Info

Publication number: CN219461229U
Application number: CN202222857428.0U
Authority: CN
Inventors: 束余泰; 杨斌; 张凤; 马振禄
Original assignee: Nanjing Yigao Medical Technology Co ltd
Current assignee: Nanjing Yigao Medical Technology Co ltd
Priority date: 2022-10-28
Filing date: 2022-10-28
Publication date: 2023-08-04
Anticipated expiration: 2032-10-28

Abstract

The utility model relates to a biopsy needle for lung ablation, which comprises an outer needle cylinder, an inner needle core, a hollow handle and a pull rod inserted into the handle from the outside of the handle, wherein the inner needle core is fixedly connected with the pull rod and is inserted into the outer needle cylinder, the head of the inner needle core is provided with a groove, the groove extends along the length direction of the inner needle core, the cross section of the groove is in a circular segment shape, and the straight edge of the circular segment is positioned on the bottom surface of the groove; the two sides of the groove are provided with baffle plates extending along the length direction of the inner needle core, and the baffle plates are fixedly connected with the inner needle core. The biopsy needle can increase the tissue volume of a single sample and reduce the number of sampling operations.

Description

Biopsy needle for lung ablation

Technical Field

The utility model relates to a biopsy needle for lung ablation, and belongs to the technical field of ablation.

Background

The tumor ablation has the advantages of quick heating, short operation time, large ablation range and the like, is widely and widely applied, and is generally carried out in an interventional mode of entering a focus through skin breaking puncture under the guidance of medical images, and cancer cells at the focus part are killed through heat generated at the front end of an ablation electrode, so that the growth of tumors can be inhibited, the effect of reducing the tumors is achieved, the sustainable growth of the tumors is prevented, and the survival time of a patient is prolonged.

Before performing an ablation operation, a biopsy needs to be performed on a focus by utilizing a biopsy, the existing biopsy needle is mostly provided with a groove type needle head structure on an inner needle core, and the specific structure form of the existing biopsy needle can be referred to Chinese patent literature with publication number of CN113017709A and name of a biopsy needle and a biopsy device with the biopsy needle, namely, a groove of the groove type needle head structure is formed by inwards sinking from the surface of the inner needle core, the groove extends along the length direction of the inner needle core, the cross section of the groove is in a circular-notch shape, and the straight edge of the circular-notch is positioned on the bottom surface of the groove.

However, the practice of the applicant shows that for the biopsy of the lung, due to the specificity of the lung tissue, the adhesion degree of the existing grooved needle structure to the lung tissue is poor, when the needle core is withdrawn after the sampling is completed, the sampling tissue easily slides down, so that the amount of the lung tissue obtained by once sampling is too small, repeated operation is required for many times, the pain of patients is increased, and the lung tissue is easily damaged and the secondary infection risk is brought. In addition, to the applicant's knowledge, there is currently no biopsy needle developed for this specific organ of the lung on the market.

It should be noted that, in this application, the head refers to the end facing the needle tip of the needle core, the tail refers to the end facing the handle, and correspondingly, the front direction in this application refers to the head, and the back direction refers to the tail.

Disclosure of Invention

The utility model aims to solve the technical problems that: a lung biopsy needle is provided which increases the amount of lung tissue for a single sampling and reduces the number of sampling procedures.

In order to solve the technical problems, the technical scheme provided by the utility model is as follows: the biopsy needle for lung ablation comprises an outer needle cylinder, an inner needle core, a hollow handle and a pull rod inserted into the handle from the outside of the handle, wherein the inner needle core is fixedly connected with the pull rod and is inserted into the outer needle cylinder, the head of the inner needle core is provided with a groove, the groove extends along the length direction of the inner needle core, the cross section of the groove is in a circular segment shape, and the straight edge of the circular segment is positioned on the bottom surface of the groove; the two sides of the groove are provided with baffle plates extending along the length direction of the inner needle core, and the baffle plates are fixedly connected with the inner needle core.

According to the utility model, the baffle plates are arranged on both sides of the groove of the inner needle core, so that the attachment degree of lung tissues in the groove is increased, after the sampled lung tissues enter the groove, the lung tissues are not easy to slide down under the blocking effect of the baffle plates, and the practice shows that the product can be used for detecting and storing the sufficient lung tissues for subsequent detection in a biopsy process at one time, so that the repeated operation times are reduced, the pain of a patient is relieved, and the lung injury and secondary infection risk are reduced.

Drawings

The utility model is further described below with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of an embodiment of the present utility model.

Fig. 2 is a schematic diagram of the internal structure of the embodiment of the present utility model.

Fig. 3 is an enlarged view of a portion a in fig. 2.

Fig. 4 is a schematic view of the recess of the inner core.

Fig. 5 is a schematic structural view of the tie rod.

Fig. 6 is a schematic structural view of the base.

Reference numerals: 1. an outer cylinder; 2. an inner needle core; 3. a handle; 4. a groove; 5. a pull rod; 6. a base; 7. a compression spring; 8. a baffle; 31. a protruding block; 51. a core hole; 52. a drag hook; 53. a boss; 61. a central bore; 62. a straight rod; 63. a first round table; 64. first row Cheng Kakou; 65. a second stroke buckle; 66. and a second round table.

Detailed Description

The embodiment relates to a biopsy needle for lung ablation, as shown in fig. 1 and 2, comprising an outer needle cylinder 1, an inner needle core 2, a hollow handle 3 and a pull rod 5 inserted into the handle 3 from outside the handle 3, wherein the inner needle core 2 is fixedly connected with the pull rod 5 and is inserted into the outer needle cylinder 1, the head of the inner needle core 2 is provided with a groove 4, the groove 4 extends along the length direction of the inner needle core 2, the cross section of the groove 4 is in a circular segment shape, and the straight edge of the circular segment is positioned on the bottom surface of the groove 4.

As shown in fig. 2 and 3, the tail of the outer cylinder 1 is preferably in a flare shape, so that not only the connection firmness of the outer cylinder 1 and the base 6 can be improved, thereby improving the sampling stability, but also the insertion of the inner needle core 2 into the outer cylinder 1 is facilitated.

As shown in fig. 4, two sides of the groove 4 are respectively provided with a baffle plate 8 extending along the length direction of the inner needle core 2, and the baffle plates 8 are fixedly connected with the inner needle core 2. According to the lung tissue composition characteristics, the front end of the inner needle core 2 overcomes the defect that the common groove type needle head structure in the prior art is difficult to access lung tissue, and a novel groove 4 structure with a storage function is formed by arranging baffle plates 8 on two sides of the groove 4, so that the lung tissue biopsy detection access of a sufficient amount can be completed at one time, repeated operation is avoided, and pain of patients is effectively relieved.

Preferably, in order to effectively increase the attachment degree of lung tissue inside the groove 4, the present embodiment performs surface blasting treatment on the inner surface of the groove 4.

Preferably, in order to facilitate the sliding of the inner needle core 2 in the outer needle cylinder 1, the height of the baffle 8 is smaller than the distance from the bottom surface of the groove 4 to the top of the groove 4.

Preferably, in order to facilitate the passage of sampled lung tissue into the recess 4, the baffle 8 and the end surface of the recess 4 close to the head of the inner needle core 2 have a gap of a preset length.

Preferably, the surfaces of the outer needle cylinder 1 and the inner needle core 2 are respectively provided with a hydrophilic coating. The hydrophilic coating can greatly reduce the friction force between the needle core and the needle cylinder surface, so that the lubricity of the surface is greatly increased, the adhesion of the needle core and the needle cylinder surface to tissues can be effectively reduced, and the symptoms of injury, infection and the like of the needle core and the needle cylinder to the tissues in the biopsy process can be effectively reduced.

Preferably, the surface of the outer needle cylinder 1 is provided with scale marks, so that a doctor can conveniently and effectively control the biopsy depth through the scales.

The present embodiment can also be modified as follows: as shown in fig. 2, 5 and 6, a base 6 fixedly connected with the outer needle cylinder 1 is arranged in the handle 3, a compression spring 7 is arranged between the end of the handle 3 far away from the head of the inner needle core 2 and the base 6, a draw hook 52 is arranged on the draw rod 5, and a straight rod 62 matched with the draw hook 52 is arranged on the base 6; a boss 53 is arranged on the outer side of the drag hook 52, and a firing button matched with the boss 53 is arranged on the handle 3; the base 6 is provided with a first row Cheng Kakou and a second stroke buckle 65, the first row Cheng Kakou and the second stroke buckle 65 are distributed along the length direction of the outer needle cylinder 1, the handle 3 is provided with a protruding block 31 matched with the first row Cheng Kakou and the second stroke buckle 65, and the draw hook 52 is located between the protruding block 31 and the straight rod 62. Wherein the mating process of the first row Cheng Kakou or the second stroke buckle 65 with the bump 31 is prior art, reference can be made to existing biopsy needles, and the innovation of the present application is the use of two stroke buckles to adjust the biopsy needle.

Further, the base 6 is provided with a first round table 63 extending towards the direction of the end part of the handle 3 far away from the head part of the inner needle core 2, the end part of the handle 3 far away from the head part of the inner needle core 2 is provided with a second round table 66 towards the base 6, and two ends of the compression spring 7 are respectively sleeved on the first round table 63 and the second round table 66.

As shown in fig. 2, the inner needle core 2 is fixed in the needle core hole 51, and the two are connected into a whole; the outer cylinder 1 is fixed in a central hole 61 of the base 6, both of which are integrally connected.

When in use, the handle 3 and the base 6 are fixed together under the action of the compression spring 7 when the first row Cheng Kakou or the second stroke buckle 65 is clamped on the convex block 31; the boss 53 of the draw hook 52 has an operating state that presses the firing button to disengage the first row Cheng Kakou or the second stroke catch 65 from the bump 31.

The working process of the biopsy needle after improvement is as follows: by pulling the pull rod 5 backwards, the base 6 is driven to move backwards, after the puncture depth is confirmed, the base 6 can be fixed on the shell through the second stroke buckle 65 of the first row Cheng Kakou 64, and therefore a certain compression distance of the compression spring 7 can be ensured. After the biopsy needle is inserted into lung tissues and the biopsy position is confirmed, the pull rod 5 is pushed forward, the inner needle core 2 pierces the biopsy position, the position is confirmed again under medical images such as CT, the pull rod 5 is pushed forward, the boss 53 at the draw hook 52 is used for pushing up the first row Cheng Kakou or the first row Cheng Kakou, the base 6 is released at the moment, and finally the biopsy needle is taken out to finish sampling. Through the improvement, the biopsy needle can be adjusted according to the characteristics of the lung focus, so that a doctor can conveniently take a biopsy sample from the lung focus, and the pain of a patient is relieved.

Claims

1. The biopsy needle for lung ablation comprises an outer needle cylinder, an inner needle core, a hollow handle and a pull rod inserted into the handle from the outside of the handle, wherein the inner needle core is fixedly connected with the pull rod and is inserted into the outer needle cylinder, the head of the inner needle core is provided with a groove, the groove extends along the length direction of the inner needle core, the cross section of the groove is in a circular segment shape, and the straight edge of the circular segment is positioned on the bottom surface of the groove; the method is characterized in that: the two sides of the groove are provided with baffle plates extending along the length direction of the inner needle core, and the baffle plates are fixedly connected with the inner needle core.

2. The biopsy needle for lung ablation according to claim 1, wherein: the height of the baffle is smaller than the distance from the bottom surface of the groove to the top of the groove.

3. The biopsy needle for lung ablation according to claim 1, wherein: the baffle and the end face of the groove, which is close to the head of the inner needle core, are provided with gaps with preset lengths.

4. The biopsy needle for lung ablation according to claim 1, wherein: and a sand blasting coating is arranged on the inner surface of the groove.

5. The biopsy needle for lung ablation according to any of claims 1-4, wherein: a base fixedly connected with the outer needle cylinder is arranged in the handle,

a compression spring is arranged between the end part of the handle far away from the head part of the inner needle core and the base, a drag hook is arranged on the pull rod, and a straight rod matched with the drag hook is arranged on the base;

a boss is arranged on the outer side of the drag hook, and a firing button matched with the boss is arranged on the handle;

the base is provided with a first row Cheng Kakou and a second stroke buckle, the first row Cheng Kakou and the second stroke buckle are distributed along the length direction of the outer needle cylinder, the handle is provided with a convex block matched with the first row Cheng Kakou and the second stroke buckle, and the draw hook is positioned between the convex block and the straight rod;

when the handle is used, the handle and the base are fixed together under the action of the compression spring when the first row Cheng Kakou or the second stroke buckle is clamped on the protruding block; the boss of the draw hook has a working state of pressing the firing button to enable the first row Cheng Kakou or the second stroke buckle to be separated from the protruding block.

6. The biopsy needle for lung ablation of claim 5, wherein: the base is provided with a first round platform extending towards the direction of the end part of the handle far away from the head part of the inner needle core, the end part of the handle far away from the head part of the inner needle core is provided with a second round platform towards the base, and two ends of the compression spring are respectively sleeved on the first round platform and the second round platform.

7. The biopsy needle for lung ablation according to any of claims 1-4, wherein: the tail part of the outer needle cylinder is in a horn mouth shape.

8. The biopsy needle for lung ablation according to any of claims 1-4, wherein: the surfaces of the outer needle cylinder and the inner needle core are respectively provided with a hydrophilic coating.

9. The biopsy needle for lung ablation according to any of claims 1-4, wherein: the surface of the outer needle cylinder is provided with scale marks.