Marrow cavity puncture practice needle

Abstract

The utility model relates to the technical field of medical teaching aids, and discloses a marrow cavity puncture practice needle which comprises a puncture needle body and a fixing seat, and the puncture needle body is movably installed on the fixing seat. The puncture needle body comprises a needle rod and a needle core, a movable cavity allowing the needle core to slide is formed in the needle rod, a reset spring is arranged in the movable cavity, the bottom end of the reset spring is fixedly connected to the top of the needle core, the top end of the reset spring is connected to the top wall of the movable cavity, a first installation cavity is further formed in the needle rod, and an angle sensor is arranged in the installation cavity. A puncture part is formed on the fixing seat, a second mounting cavity is further formed in the fixing seat, a pressure sensor is arranged in the second mounting cavity, and the second mounting cavity is located below the puncture part; and the puncture part is made of a flexible material. The purpose of the utility model is to enable students to intuitively judge whether own action essentials are standard or not when practicing bone marrow puncture, and make adjustments in time, so that the practicing effect is better.

Description

Technical Field

[0001] The utility model belongs to the field of medical teaching tools, and in particular relates to a bone marrow cavity puncture practice needle. Background Art

[0002] In the hematology department, many diseases require blood testing. When clinically diagnosing blood system diseases, bone marrow puncture is the most important and basic examination item. The bone marrow puncture needle is a common medical instrument in bone marrow puncture and bone marrow biopsy operations. Bone marrow puncture is a content that every medical student must master. It is a content that medical students are required to master during their internship and standardized training for resident doctors. Therefore, every medical student needs to master bone marrow puncture through a lot of practice.

[0003] When practicing bone marrow puncture, the main points of practicing are the standard techniques of some movements, such as the force and angle of puncture. In the existing bone marrow puncture practice, students can only judge whether the force and angle of puncture meet the puncture standards through subjective feeling. It is impossible for students to judge whether the movements are standard from an objective perspective, which leads to poor practice results.

[0004] In view of this, the inventor conducted in-depth research on the above-mentioned defects in the prior art, and thus came up with this case. Utility Model Content

[0005] The utility model aims to provide a bone marrow cavity puncture practice needle, so that when students practice bone marrow puncture, they can more intuitively judge whether their action essentials are standardized and make adjustments in time to achieve better practice effects.

[0006] In order to achieve the above technical purpose, the technical solution adopted by the utility model is as follows:

[0007] A bone marrow puncture practice needle, comprising a puncture needle body and a fixing seat, the puncture needle body being movably mounted on the fixing seat; the puncture needle body comprising a needle rod and a needle core, a movable cavity for sliding of the needle core being formed in the needle rod, a reset spring being arranged in the movable cavity, the bottom end of the reset spring being fixedly connected to the top of the needle core, and the top end being connected to the top wall of the movable cavity, a first mounting cavity being also formed in the needle rod, and an angle sensor being arranged in the first mounting cavity; a puncture portion being formed on the fixing seat, a second mounting cavity being also formed in the fixing seat, a pressure sensor being arranged in the second mounting cavity, and the second mounting cavity being located below the puncture portion; the puncture portion is made of a flexible material.

[0008] Furthermore, the fixing seat is also provided with a connecting assembly, which includes a rotating ring rotatably connected to the fixing seat and two connecting posts movably connected to the rotating ring; a connecting block vertically arranged toward the needle rod is formed on the connecting post, and a connecting shaft slidably matched with the needle rod is formed at the end of the connecting block. The puncture needle body is connected to the fixing seat through the connecting assembly, which can avoid the puncture needle body being lost after the teaching is completed. In addition, the movable connection between the rotating ring and the fixing seat can also facilitate the practice of the puncture needle core rotating left and right after contacting the bone.

[0009] Furthermore, the rotating ring is provided with a connection seat that rotates with the connection column; the connection seat is provided with a rotation shaft, and the connection column is provided with a connection hole that rotates with the rotation shaft. The connection column and the connection seat are rotated to cooperate with each other, so that the puncture angle can be adjusted conveniently during practice.

[0010] Furthermore, a slide groove extending along the axial direction of the needle rod is formed on the side wall of the needle rod, a slide seat is slidably connected in the slide groove, and a rotating hole rotatably matched with the connecting shaft is formed on the slide seat. When practicing puncture, the needle rod can be moved downwards through the slide groove.

[0011] Furthermore, a slider is formed on the top of the needle core and is slidably matched with the inner wall of the active cavity, and the bottom end of the return spring is fixedly connected to the top of the slider. The slider can make the needle core more stable when extending inward.

[0012] Furthermore, a baffle is formed on the top of the needle bar, and a handle is formed on the top of the baffle, so that the needle bar can be easily held during practice through the handle and the baffle.

[0013] After adopting the above structure, the utility model involves a bone marrow cavity puncture practice needle. Compared with the prior art, the present invention has the advantage that the needle core is movably installed in the needle rod. When practicing puncture, the needle core is reversely extended into the needle rod to simulate the state of the needle core piercing the bone marrow. Through the angle sensor, it can be accurately determined whether the puncture angle is standard, and through the pressure sensor, it can be accurately determined whether the puncture force meets the operating specifications. In this way, the corrective action can be adjusted in time according to the monitored data, so that the effect of the practice is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention can be further described by the non-limiting embodiments given in the accompanying drawings;

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the fixing seat in the utility model;

[0017] Figure 3 for Figure 2 Schematic cross-sectional view of ;

[0018] Figure 4 It is a structural schematic diagram of the puncture needle body in the utility model;

[0019] Figure 5 for Figure 4 Schematic cross-sectional view of ;

[0020] Figure 6 for Figure 4 A schematic diagram of the local enlarged structure at point A in the middle;

[0021] Figure 7 It is an exploded schematic diagram of the connection assembly in the present utility model.

[0022] The symbols of the main components are explained as follows: puncture needle body 1, needle rod 11, movable cavity 111, first installation cavity 112, slide groove 113, slide seat 114, rotating hole 1141, baffle 115, handle 116, needle core 12, slider 121, reset spring 13, fixed seat 2, puncture part 21, second installation cavity 22, rotating groove 23, angle sensor 3, pressure sensor 4, connecting assembly 5, rotating ring 51, connecting seat 511, rotating shaft 512, connecting column 52, connecting block 521, connecting shaft 522, connecting hole 523. DETAILED DESCRIPTION

[0023] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that in the drawings or in the specification, similar or identical parts use the same figure numbers, and the implementation methods not shown or described in the drawings are forms known to ordinary technicians in the relevant technical field. In addition, the directional terms mentioned in the embodiments, such as "upper", "lower", "top", "bottom", "left", "right", "front", "back", etc., are only referenced to the directions of the drawings and are not used to limit the scope of protection of the present invention.

[0024] like Figure 1 to Figure 7As shown, a bone marrow puncture practice needle involved in the utility model comprises a puncture needle body 1 and a fixing seat 2, wherein the puncture needle body 1 is movably mounted on the fixing seat 2; the puncture needle body 1 comprises a needle rod 11 and a needle core 12, wherein a movable cavity 111 for sliding of the needle core 12 is formed in the needle rod 11, wherein a return spring 13 is arranged in the movable cavity 111, wherein the bottom end of the return spring 13 is fixedly connected to the top of the needle core 12, and the top end is connected to the top wall of the movable cavity 111, wherein a first mounting cavity 112 is further formed in the needle rod 11, wherein an angle sensor 3 is arranged in the first mounting cavity 112; a puncture portion 21 is formed on the fixing seat 2, wherein the fixing seat 2 also forms a second mounting cavity 22 , a pressure sensor 4 is provided in the second installation cavity 22, and the second installation cavity 22 is located below the puncture portion 21; the puncture portion 21 is made of a flexible material, specifically a rubber material, and the bottom of the needle core 12 is arc-shaped. During puncture, the bottom of the needle core 12 contacts the puncture portion 21, thereby pressing the pressure sensor 4. It is worth noting that during puncture, the needle core 12 will not puncture the puncture portion 21, and the needle core 12 will shrink toward the inside of the needle rod 11. In this embodiment, the angle sensor 3 and the pressure sensor 4 can output the monitored data in the form of electrical signals, so that during practice, the puncture action can be adjusted in time according to changes in the data.

[0025] Preferably, the fixing seat 2 is also provided with a connecting assembly 5, which includes a rotating ring 51 rotatably connected to the fixing seat 2 and two connecting posts 52 movably connected to the rotating ring 51, and a rotating groove 23 cooperating with the rotating ring 51 is formed on the connecting seat 511; the angle between the two connecting posts 52 is 180 degrees, and a connecting block 521 is formed on the connecting post 52 and arranged vertically toward the needle rod 11, and a connecting shaft 522 slidably cooperating with the needle rod 11 is formed at the end of the connecting block 521. Connecting the puncture needle body 1 to the fixing seat 2 through the connecting assembly 5 can prevent the puncture needle body 1 from being lost after the teaching is completed. In addition, the movably connected rotating ring 51 and the fixing seat 2 can also facilitate the practice of the needle core 12 of the puncture needle rotating left and right for puncture after contacting the bone.

[0026] Preferably, a connection seat 511 is formed on the rotating ring 51 to rotate with the connection column 52; a rotation shaft 512 is formed on the connection seat 511, and a connection hole 523 is formed on the connection column 52 to rotate with the rotation shaft 512. The connection column 52 and the connection seat 511 are rotated to cooperate, so that the puncture angle can be adjusted conveniently during practice.

[0027] Preferably, a slide groove 113 extending along the axial direction of the needle rod 11 is formed on the side wall of the needle rod 11, a slide seat 114 is slidably connected in the slide groove 113, and a rotation hole 1141 is formed on the slide seat 114 to rotate with the connecting shaft 522. When practicing puncture, the slide groove 113 facilitates the downward movement of the needle rod 11, and limiting grooves are formed on both sides of the slide groove 113, and limiting blocks that cooperate with the limiting grooves are formed on both sides of the slide seat 114 to prevent the slide seat 114 from being separated from the slide groove 113.

[0028] Preferably, a slider 121 is formed at the top of the needle core 12 to slide with the inner wall of the active cavity 111, and the bottom end of the return spring 13 is fixedly connected to the top of the slider 121. The slider 121 can make the needle core 12 more stable when extending inward.

[0029] Preferably, a baffle 115 is formed on the top of the needle bar 11, and a handle 116 is formed on the top of the baffle 115. The handle 116 and the baffle 115 make it easier to hold the needle bar 11 during practice. During specific operation, the handle 116 is directly held by hand, and the thumb and index finger are pressed against the baffle 115, which makes it easier to apply force.

[0030] The method of using the utility model is as follows: when practicing puncture, you can first draw the puncture point on the puncture part 21, then hold the handle 116, adjust the puncture angle, and puncture the puncture point. During the puncture process, you can judge whether your action is accurate based on the data monitored by the pressure sensor 4 and the angle sensor 3. If not, you can make timely adjustments based on the monitoring data.

[0031] The above is a detailed introduction to a bone marrow puncture practice needle provided by the utility model. The description of the specific embodiment is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A bone marrow puncture training needle, characterized in that: The invention comprises a puncture needle body (1) and a fixing seat (2), wherein the puncture needle body (1) is movably mounted on the fixing seat (2); the puncture needle body (1) comprises a needle rod (11) and a needle core (12), wherein a movable cavity (111) for sliding of the needle core is formed in the needle rod (11), a return spring (13) is arranged in the movable cavity (111), the bottom end of the return spring (13) is fixedly connected to the top of the needle core (12), and the top end is connected to the top wall of the movable cavity (111), a first installation cavity (112) is also formed in the needle rod (11), and an angle sensor (3) is arranged in the first installation cavity (112); a puncture portion (21) is formed on the fixing seat (2), and a second installation cavity (22) is also formed in the fixing seat (2), a pressure sensor (4) is arranged in the second installation cavity, and the second installation cavity (22) is located below the puncture portion (21); the puncture portion (21) is made of a flexible material.

2. A bone marrow puncture practice needle according to claim 1, characterized in that: The fixing seat (2) is also provided with a connecting assembly (5), and the connecting assembly (5) comprises a rotating ring (51) rotatably connected to the fixing seat (2) and two connecting posts (52) movably connected to the rotating ring (51); a connecting block (521) vertically arranged toward the needle rod (11) is formed on the connecting post (52), and a connecting shaft (522) slidably matched with the needle rod (11) is formed at the end of the connecting block (521).

3. A bone marrow puncture practice needle according to claim 2, characterized in that: The rotating ring (51) is formed with a connecting seat (511) that rotates with the connecting column (52); the connecting seat (511) is formed with a rotating shaft (512); and the connecting column (52) is formed with a connecting hole (523) that rotates with the rotating shaft (512).

4. A bone marrow puncture practice needle according to claim 3, characterized in that: A slide groove (113) extending along the axial direction of the needle rod (11) is formed on the side wall of the needle rod (11), a slide seat (114) is slidably connected in the slide groove (113), and a rotating hole (1141) is formed on the slide seat (114) for rotationally cooperating with the connecting shaft (522).

5. A bone marrow puncture practice needle according to claim 1, characterized in that: A slider (121) is formed at the top of the needle core (12) and is slidably matched with the inner wall of the active cavity (111), and the bottom end of the return spring (13) is fixedly connected to the top of the slider (121).

6. A bone marrow puncture practice needle according to claim 1, characterized in that: A baffle (115) is also formed on the top of the needle rod (11), and a handle (116) is formed on the top of the baffle (115).

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