Tibia bone marrow puncture needle

Abstract

The present application relates to the technical field of medical devices, and discloses a tibial bone marrow puncture needle, which comprises a puncture needle main body and a needle core, the puncture needle main body comprises a needle tube body and a handle, and further comprises a buffer assembly; the buffer assembly comprises a buffer spring and a front top plate which can be in contact with a patient, the front top plate is flush with the tip of the needle tube body, the bottom end of the handle is provided with a rear top plate, and the two ends of the buffer spring are fixedly connected to the front top plate and the rear top plate respectively; the middle part of the front top plate is formed with a through hole for the needle tube body to pass through; the top of the front top plate is provided with a plurality of guide sleeves, and the bottom of the rear top plate is formed with a plurality of guide rods which are in sliding cooperation with the guide sleeves; the buffer spring is sleeved on the needle tube body; and the guide sleeves are further provided with a limiting clamping mechanism for preventing the buffer spring from rebounding and resetting. The purpose is to realize the buffering of the puncture needle when the puncture needle penetrates into the bone marrow cavity, so that the medical staff can timely collect force, the contralateral bone is avoided from being punctured, and the safety of puncture is improved.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically relating to a tibial bone marrow aspiration needle. Background Technology

[0002] Tibial aspiration is a commonly used diagnostic technique that involves aspirating bone marrow fluid using a needle. Diagnostic examinations can be performed using techniques such as hand cytology, bacteriology, and parasitology.

[0003] During puncture, medical staff usually manually hold the puncture needle and insert it into the tibial shaft using a twisting motion. They need to judge whether the resistance at the tip of the needle has disappeared based on their sense of touch, thus determining whether the needle has entered the medullary cavity. Because a lot of force is applied during the drilling process, when the resistance at the tip of the needle disappears, there is a feeling of emptiness. Medical staff may not be able to release the force in time, which may lead to the needle being inserted too deeply. This is especially true in elderly patients with brittle bones or young patients with thin bone walls. There is even a risk of puncturing the bone on the opposite side, which is quite unsafe.

[0004] In view of this, the inventor conducted in-depth research on the aforementioned deficiencies in the prior art, which led to the creation of this case. Summary of the Invention

[0005] The purpose of this invention is to provide a tibial bone marrow aspiration needle that can buffer the needle when it enters the bone marrow cavity, allowing medical staff to release force in time, avoiding puncture of the contralateral bone, and improving the safety of the puncture.

[0006] To achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is as follows:

[0007] A tibial bone marrow aspiration needle includes a needle body and a needle core. The needle body includes a needle tube and a handle, and also includes a buffer assembly. The buffer assembly includes a buffer spring and a front top plate that can contact the patient. The front top plate is flush with the tip of the needle tube. The bottom end of the handle is provided with a rear top plate. The two ends of the buffer spring are respectively fixedly connected to the front top plate and the rear top plate. A through hole is formed in the middle of the front top plate for the needle tube to pass through. Multiple guide sleeves are provided at the top of the front top plate, and multiple guide rods that slide with the guide sleeves are formed at the bottom of the rear top plate. The buffer spring is sleeved on the needle tube. The guide sleeve is also provided with a limiting and locking mechanism to prevent the buffer spring from rebounding and returning to its original position.

[0008] Furthermore, a rotating cavity is formed at the bottom of the rear top plate, and a rotating block is rotatably mounted within the rotating cavity. The guide rod and the buffer spring are fixedly connected to the rotating block. During twisting insertion, the rotating block prevents the buffer assembly from rotating together.

[0009] Furthermore, a limiting guide rail extending along its axial direction is formed on the inner wall of the guide sleeve; a limiting groove is formed on the guide rod to slide in cooperation with the limiting guide rail. The cooperation between the limiting guide rail and the limiting groove prevents relative rotation between the guide rod and the guide sleeve, thereby causing the limiting locking mechanism to disengage from the guide rod.

[0010] Furthermore, a plurality of locking grooves are formed on the side of the guide rod away from the needle body. Each locking groove has a locking step and a guide surface. The locking grooves are arranged at equal intervals along the length of the guide rod. The limiting locking mechanism includes a locking member that mates with the locking groove, a driving member that drives the locking member out of the locking groove, a first spring connected between the locking member and the guide sleeve, and a second spring connected between the driving member and the guide sleeve. The guide sleeve housing has a first mounting cavity for mounting the locking member and the first spring, and a second mounting cavity for mounting the driving member and the second spring. The first mounting cavity is located above the second mounting cavity. The locking member moves radially along the guide sleeve, and the driving member moves axially along the guide sleeve. When the needle is inserted downwards by twisting the needle, the guide surface forces the locking member to retract from the locking groove. After releasing the force, the first spring pushes the locking member into the locking groove and into contact with the locking step, preventing the buffer spring from rebounding.

[0011] Furthermore, the locking member includes a locking block and a locking plate that can extend into the locking groove and contact the locking step. The locking plate is slidably engaged with the first mounting cavity, and the first spring is fixedly connected to the first mounting cavity and the locking plate. The driving member includes a driving block, a driving plate, and a toggle block. The driving plate is slidably engaged with the second mounting cavity, and the second spring is fixedly connected between the bottom of the driving plate and the second mounting cavity. A first guide slope is formed on the top of the driving block, and a second guide slope is formed on the bottom of the side of the locking plate near the locking block, which is slidably engaged with the first guide slope. A channel for the driving block to pass through is also formed between the first mounting cavity and the second mounting cavity. The toggle block is connected to the side of the driving plate away from the needle body and extends to the outside of the guide sleeve. A clearance groove for the toggle block to slide up and down is also formed on the outer wall of the guide sleeve.

[0012] Furthermore, the limiting and locking mechanism also includes a drive ring; the drive ring surrounds the outer side of the plurality of guide sleeves; the actuating block is fixedly connected to the inner sidewall of the drive ring. The drive ring allows for simultaneous control of the up-and-down sliding of multiple driving components, making operation more convenient.

[0013] Furthermore, a threaded post is formed on the upper part of the needle body, and a connecting post is provided at the top of the threaded post. The handle is threadedly engaged with the threaded post. A connecting cap is formed at the top of the needle core, and the connecting cap is threadedly connected to the connecting post. In use, the position of the handle can be adjusted according to the patient's actual situation, thereby exposing the corresponding length of the needle body and making it easier to control the puncture depth.

[0014] Furthermore, it also includes a fixation component, which comprises a fixation frame sleeved on the front top plate and arc-shaped clamps hinged to both ends of the fixation frame. A torsion spring is provided at the hinge point between the arc-shaped clamps and the fixation frame. Using the fixation component, stability can be maintained during the puncture process, and the puncture needle can be kept stable when aspirating bone marrow fluid after the puncture.

[0015] With the above-described structure, the tibial bone marrow aspiration needle of the present invention has the following advantages compared with the prior art:

[0016] I. By setting up a buffer component, when the needle loses resistance at the tip of the needle body the moment it enters the bone marrow cavity, a portion of the puncture force can be released through the buffer spring, giving medical staff enough time to react and withdraw the force in time, avoiding excessive insertion and puncturing the opposite bone, thus improving the safety of the entire puncture operation.

[0017] Second, initially align the tip of the anterior plate with the tip of the needle body. This ensures that the anterior plate is in contact with the patient's skin at the start of the puncture, making it easier to maintain the puncture angle throughout the procedure and ensuring greater stability.

[0018] Third, by using a limiting and locking mechanism, after the puncture is in place and during the aspiration of bone marrow fluid, the limiting and locking mechanism can fix the guide rod in the guide sleeve, preventing the puncture needle from being ejected from the bone marrow cavity under the action of the buffer spring. Attached Figure Description

[0019] The present invention can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 This is a structural schematic diagram of the present invention from another angle;

[0022] Figure 3 for Figure 1 A cross-sectional schematic diagram;

[0023] Figure 4 This is a schematic diagram of the limiting and locking mechanism in this invention;

[0024] Figure 5This is a schematic diagram of the locking component in this invention;

[0025] Figure 6 This is a schematic diagram of the driving component in this invention;

[0026] Figure 7 This is a schematic diagram of the front top plate in this invention;

[0027] Figure 8 for Figure 7 A magnified schematic diagram of the partial structure at point A in the middle;

[0028] Figure 9 for Figure 7 A cross-sectional schematic diagram;

[0029] Figure 10 for Figure 9 A magnified view of the structure at point B in the middle;

[0030] Figure 11 This is a schematic diagram of the needle core in this invention;

[0031] Figure 12 This is a schematic diagram of the needle body in this invention;

[0032] Figure 13 This is a schematic diagram of the rotating block structure in this invention.

[0033] The main component symbols are explained as follows: Puncture needle body 1, needle tube body 11, threaded post 111, connecting post 112, handle 12, rear top plate 121, guide rod 1211, limiting slide groove 1212, locking groove 1213, locking step 1214, guide surface 1215, needle core 2, connecting cap 21, buffer assembly 3, buffer spring 31, front top plate 32, through hole 321, guide sleeve 322, limiting guide rail 3221, first safety device. Cavity 3222, second mounting cavity 3223, clearance groove 3224, rotating block 33, limit locking mechanism 4, locking component 41, locking block 411, locking plate 412, second guide slope 4121, driving component 42, driving block 421, first guide slope 4211, driving plate 422, toggle block 423, first spring 43, second spring 44, driving ring 45, fixing assembly 5, fixing frame 51, arc-shaped clamping plate 52. Detailed Implementation

[0034] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that similar or identical parts are referred to by the same reference numerals in the drawings or description. Implementations not shown or described in the drawings are forms known to those skilled in the art. In addition, directional terms mentioned in the embodiments, such as "up," "down," "top," "bottom," "left," "right," "front," and "back," are only for reference to the directions in the drawings and are not intended to limit the scope of protection of the present invention.

[0035] like Figures 1 to 13 As shown, this invention relates to a tibial bone marrow aspiration needle, comprising a needle body 1 and a needle core 2. The needle body 1 includes a needle tube 11 and a handle 12. The needle core 2 is inserted into the needle tube 11. During the puncture, the needle core 2 prevents the needle tube 11 from becoming blocked. When the needle tube 11 is inserted into the bone marrow cavity and bone marrow aspiration is required, the needle core 2 is withdrawn from the needle tube 11. The puncture needle is also equipped with a buffer assembly 3. The buffer assembly 3 includes a buffer spring 31 and a front top plate 32 that can contact the patient. The front top plate 32 is connected to the needle tube 1. The tip of the handle 12 is flush with the bottom of the handle 12, and the two ends of the buffer spring 31 are fixedly connected to the front top plate 32 and the rear top plate 121 respectively. The middle part of the front top plate 32 forms a through hole 321 for the needle tube body 11 to pass through. The top of the front top plate 32 is provided with multiple guide sleeves 322, and the bottom of the rear top plate 121 forms multiple guide rods 1211 that slide with the guide sleeves 322. The buffer spring 31 is sleeved on the needle tube body 11. The guide sleeve 322 is also provided with a limiting and locking mechanism 4 to prevent the buffer spring 31 from rebounding and resetting. After completing the preliminary puncture preparations, align the through-hole 321 with the puncture point during the puncture, and then begin the twisting puncture. The moment the needle body 11 pierces the bone marrow cavity, the resistance at the front end of the needle body 11 disappears. At this time, under the action of the buffer spring 31, it can continue to provide resistance to the medical staff, giving them enough time to react and withdraw force in time, avoiding excessive puncture and piercing the opposite bone, thus improving the safety of the entire puncture operation.

[0036] Preferably, a rotating cavity is formed at the bottom of the rear top plate 121, and a rotating block 33 is rotatably mounted in the rotating cavity. The guide rod 1211 and the buffer spring 31 are fixedly connected to the rotating block 33. During twisting insertion, the rotating block 33 and the rear top plate 121 will rotate relative to each other, so that the front top plate 32 and the buffer spring 31 can remain stable and will not rotate.

[0037] Preferably, a limiting guide rail 3221 extending along its axial direction is formed on the inner wall of the guide sleeve 322; a limiting groove 1212 is formed on the guide rod 1211 that slides in cooperation with the limiting guide rail 3221. The cooperation between the limiting guide rail 3221 and the limiting groove 1212 prevents relative rotation between the guide rod 1211 and the guide sleeve 322, thereby causing the limiting locking mechanism 4 to disengage from the guide rod 1211.

[0038] Preferably, a plurality of locking grooves 1213 are formed on the side of the guide rod 1211 away from the needle body 11. The locking grooves 1213 have locking steps 1214 and guide surfaces 1215. The plurality of locking grooves 1213 are arranged at equal intervals along the length direction of the guide rod 1211. The limiting locking mechanism 4 includes a locking member 41 that can cooperate with the locking grooves 1213, a driving member 42 that drives the locking member 41 to exit the locking grooves 1213, and a first locking member 42 connected between the locking member 41 and the guide sleeve 322. Spring 43 and a second spring 44 connected between drive member 42 and guide sleeve 322; the housing of guide sleeve 322 has a first mounting cavity 3222 for mounting the locking member 41 and the first spring 43 and a second mounting cavity 3223 for mounting the drive member 42 and the second spring 44, the first mounting cavity 3222 being located above the second mounting cavity 3223; the locking member 41 moves radially along the guide sleeve 322, and the drive member 42 moves axially along the guide sleeve 322. When the twisting motion is downward, the guide surface 1215 can force the locking member 41 to retract from the locking groove 1213, and after releasing the force, the first spring 43 pushes the locking member 41 into the locking groove 1213 to contact the locking step 1214, preventing the buffer spring 31 from rebounding. Specifically, the locking component 41 includes a locking block 411 that can extend into the locking groove 1213 and contact the locking step 1214, and a locking plate 412. The locking plate 412 is slidably engaged with the first mounting cavity 3222. The first spring 43 is fixedly connected to the first mounting cavity 3222 and the locking plate 412. There are two locking blocks 411 arranged vertically, and the distance between the two locking blocks 411 is equal to the distance between adjacent locking grooves 1213. The driving component 42 includes a driving block 421, a driving plate 422, and a toggle block 423. The driving plate 422 is slidably engaged with the second mounting cavity 3223. The second spring 44 is fixedly connected between the bottom of the driving plate 422 and the second mounting cavity 3223. There are two driving blocks 421 arranged horizontally. A first guide slope 4211 is formed at the top of the plate 412. A second guide slope 4121 is formed at the bottom of the side of the plate 412 near the stop block 411, which slides with the first guide slope 4211. The stop block 411 is located in the middle of the plate 412. The second guide slope 4121 is located on both sides of the stop block 411. The distance between the two drive blocks 421 is equal to the width of the stop block 411. In addition, a channel for the drive block 421 to pass through is formed between the first mounting cavity 3222 and the second mounting cavity 3223. The actuating block 423 is connected to the side of the drive plate 422 away from the needle body 11 and extends to the outside of the guide sleeve 322. A relief groove 3224 for the actuating block 423 to slide up and down is formed on the outer wall of the guide sleeve 322. The limiting and locking mechanism also includes a drive ring 45; the drive ring 45 surrounds the outside of the plurality of guide sleeves 322; the actuating block 423 is fixedly connected to the inner wall of the drive ring 45.During operation, the drive ring 45 is lifted upward, thereby moving the drive component 42 upward. During the movement, the locking component 41 can be moved backward through the cooperation of the first guide slope 4211 and the second guide slope 4121, so that the locking block 411 is disengaged from the locking groove 1213. At this time, the distance between the front top plate 32 and the rear top plate 121 can be adjusted. This operation is mainly carried out in the preliminary preparation work.

[0039] Preferably, a threaded post 111 is formed on the upper part of the needle body 11, and a connecting post 112 is provided at the top of the threaded post 111. The handle 12 is threadedly engaged with the threaded post 111. A connecting cap 21 is formed on the top of the needle core 2, and the connecting cap 21 is threadedly connected to the connecting post 112. In use, the position of the handle 12 can be adjusted according to the patient's actual situation, thereby exposing the corresponding length of the needle body 11, making it easier to control the puncture depth. After adjusting the position of the handle 12, the front and rear top plates 121 can be adjusted by the limiting stop 41 to align the front plate 32 with the front end of the needle body 11.

[0040] Preferably, the puncture needle is further provided with a fixation component 5. The fixation component 5 includes a fixation frame 51 sleeved on the front top plate 32 and arc-shaped clamps 52 hinged to both ends of the fixation frame 51. The fixation frame 51 and the front top plate 32 can be detachably connected by a snap-fit ​​or threaded connection, facilitating the replacement of the fixation component 5 to accommodate patients of different ages. A torsion spring is provided at the hinge point between the arc-shaped clamps 52 and the fixation frame 51. The arc-shaped clamps 52 can be made of elastic material. The fixation component 5 ensures stability during puncture and keeps the puncture needle stable when aspirating bone marrow fluid after puncture. During operation, simply clamp the two arc-shaped clamps 52 onto the site where the patient needs to be punctured.

[0041] The method of using this invention is as follows: After completing routine preoperative preparations, adjust the distance between the anterior top plate 32 and the posterior top plate 121 according to the patient's age and body type. Then, select a suitable fixing component 5 and install it on the anterior top plate 32. Next, clamp the fixing component 5 at the patient's puncture site so that the through hole 321 on the anterior top plate 32 corresponds to the puncture point. Then, the puncture can begin. The puncture method adopts a twisting puncture. During the puncture process, as the needle body 11 is inserted, the guide rod 1211 continuously penetrates into the guide sleeve 322. Under the action of the limiting and locking mechanism 4, the buffer spring 31 can be prevented from rebounding. When the needle body 11 pierces the bone marrow cavity, the buffer spring 31 can continue to provide resistance, giving medical staff enough time to react and withdraw force in time to avoid puncturing too deeply and piercing the contralateral bone.

[0042] The foregoing has provided a detailed description of a tibial bone marrow aspiration needle provided by the present invention. The specific embodiments described are merely for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A tibial bone marrow aspiration needle, comprising a needle body (1) and a needle core (2), wherein the needle body (1) comprises a needle tube (11) and a handle (12), characterized in that: It also includes a buffer assembly (3); the buffer assembly (3) includes a buffer spring (31) and a front top plate (32) that can contact the patient, the front top plate (32) being flush with the tip of the needle body (11), and a rear top plate (121) being provided at the bottom end of the handle (12), the two ends of the buffer spring (31) being fixedly connected to the front top plate (32) and the rear top plate (121) respectively; a through hole (321) is formed in the middle of the front top plate (32) for the needle body (11) to pass through; a plurality of guide sleeves (322) are provided at the top of the front top plate (32), and a plurality of guide rods (1211) are formed at the bottom of the rear top plate (121) that slide with the guide sleeves (322); the... A buffer spring (31) is sleeved on the needle tube body (11); the guide sleeve (322) is also provided with a limiting locking mechanism (4) to prevent the buffer spring (31) from rebounding and resetting; a plurality of locking grooves (1213) are formed on the side of the guide rod (1211) away from the needle tube body (11), the locking groove (1213) has a locking step (1214) and a guide surface (1215), and the plurality of locking grooves (1213) are arranged at equal intervals along the length direction of the guide rod (1211); the limiting locking mechanism (4) includes a locking member (41) that can cooperate with the locking groove (1213), a driving member (42) that drives the locking member (41) to exit the locking groove (1213), and a connection to the A first spring (43) is connected between the locking member (41) and the guide sleeve (322), and a second spring (44) is connected between the driving member (42) and the guide sleeve (322); a first mounting cavity (3222) for mounting the locking member (41) and the first spring (43) and a second mounting cavity (3223) for mounting the driving member (42) and the second spring (44) are formed in the housing of the guide sleeve (3222), and the first mounting cavity (3222) is located above the second mounting cavity (3223); the locking member (41) moves in the radial direction of the guide sleeve (322), and the driving member (42) moves in the axial direction of the guide sleeve (322); The locking member (41) includes a locking block (411) that can extend into the locking groove (1213) and contact the locking step (1214) and a locking plate (412). The locking plate (412) is slidably engaged with the first mounting cavity (3222). The first spring (43) is fixedly connected to the first mounting cavity (3222) and the locking plate (412). The driving member (42) includes a driving block (421), a driving plate (422), and a toggle block (423). The driving plate (422) is slidably engaged with the second mounting cavity (3223). The second spring (44) is fixedly connected between the bottom of the driving plate (422) and the second mounting cavity (3223).The top of the drive block (421) is formed with a first guide slope (4211), and the bottom of the locking plate (412) near the locking block (411) is formed with a second guide slope (4121) that slides with the first guide slope (4211); a channel for the drive block (421) to pass through is also formed between the first mounting cavity (3222) and the second mounting cavity (3223); the actuating block (423) is connected to the drive plate (421). 22) On the side away from the needle body (11) and extending to the outside of the guide sleeve (322), a clearance groove (3224) is also formed on the outer wall of the guide sleeve (322) for the actuating block (423) to slide up and down; the limiting and locking mechanism (4) also includes a drive ring (45); the drive ring (45) surrounds the outside of the plurality of guide sleeves (322); the actuating block (423) is fixedly connected to the inner wall of the drive ring (45).

2. The tibial bone marrow aspiration needle according to claim 1, characterized in that: The bottom of the rear top plate (121) has a rotating cavity, in which a rotating block (33) is rotatably installed. The guide rod (1211) and the buffer spring (31) are fixedly connected to the rotating block (33).

3. The tibial bone marrow aspiration needle according to claim 2, characterized in that: The inner wall of the guide sleeve (322) is formed with a limiting guide rail (3221) extending along its axial direction; the guide rod (1211) is formed with a limiting groove (1212) that slides with the limiting guide rail (3221).

4. The tibial bone marrow aspiration needle according to claim 1, characterized in that: The upper part of the needle tube body (11) is formed with a threaded post (111), and the top of the threaded post (111) is provided with a connecting post (112). The handle (12) is threadedly engaged with the threaded post (111). The top of the needle core (2) is formed with a connecting cap (21), and the connecting cap (21) is threadedly connected with the connecting post (112).

5. The tibial bone marrow aspiration needle according to claim 1, characterized in that: It also includes a fixing component (5), which includes a fixing frame (51) sleeved on the front top plate (32) and an arc-shaped clamp (52) hinged to both ends of the fixing frame (51). A torsion spring is provided at the hinge of the arc-shaped clamp (52) and the fixing frame (51).

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