Precise positioning guide needle for kidney puncture biopsy

Abstract

This utility model relates to the field of medical device technology and discloses a precise positioning guide needle for kidney biopsy, including a sampling needle handle shell. The micro-adjustment mechanism includes a fixed connecting shaft, which is fixedly connected to the outside of the sampling needle body. Connecting blocks are fixedly connected to the upper and lower sides of the fixed connecting shaft, and a sliding button is fixedly connected to the top of the connecting blocks. A negative pressure mechanism is fixedly connected to the left side of the fixed connecting shaft. A guide shaft is slidably connected inside the connecting blocks, and a return spring is fixedly connected to the right side of the connecting blocks. In this utility model, during biopsy, the sampling needle body is inserted into the human body. During this process, the auxiliary support block contacts the skin, providing support and auxiliary positioning functions. When approaching the kidney, the sliding button is pushed. The sliding button, in conjunction with the connecting blocks, drives the sampling needle body to slide, thereby performing micro-manipulation on the sampling needle body.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a precise positioning guide needle for kidney biopsy. Background Technology

[0002] Kidney biopsy is a medical procedure used to diagnose kidney diseases. It typically involves puncturing kidney tissue with a fine needle and extracting a sample for examination. This examination helps doctors understand the health of the kidneys and diagnose various kidney diseases such as nephritis and nephrotic syndrome. Commonly used kidney biopsy tools include kidney puncture needles (such as Tru-Cut needles) and ultrasound-guided devices. The beneficial effects of kidney biopsy include accurate diagnosis of kidney diseases, guidance of treatment plans, monitoring of disease changes, and classification and prognosis assessment of diseases. This examination provides patients with valuable diagnostic information and is an important means of treating kidney diseases.

[0003] A renal biopsy needle is a medical tool used to obtain kidney tissue samples for pathological analysis. It works by inserting a thin, sharp needle through the skin and outer layer of the kidney under local anesthesia into the kidney parenchyma. The needle tip is designed with a special cutting structure that allows a small piece of kidney tissue to be removed during insertion. This tissue sample is then sent to a laboratory for microscopic examination to help diagnose kidney disease or monitor kidney function. During the biopsy, imaging techniques such as ultrasound or CT guidance can be used to ensure precise needle placement, reduce risks, and improve accuracy.

[0004] In existing technologies, some renal biopsy needles introduce air into the body during use. This air entering the kidney or surrounding tissues can cause emphysema or other complications, affecting the patient's recovery process. In addition, during kidney tissue sampling, the design and operation of the needle can cause the extracted kidney sample to become stuck inside the needle tip, making it difficult to remove completely. This can lead to incomplete sampling or require additional processing, increasing the complexity and risk of the surgery. These problems need to be further optimized in renal biopsy technology. To address these issues, a precise positioning guide needle for renal biopsy is proposed. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a precise positioning guide needle for kidney biopsy, aiming to improve the problem that some existing kidney biopsy needles introduce air into the body during use. This air entering the kidney or surrounding tissues can lead to emphysema or other complications, affecting the patient's recovery process.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a precise positioning guide needle for kidney biopsy, comprising a sampling needle handle shell, a sampling needle body slidably connected to the left side of the sampling needle handle shell, an auxiliary positioning mechanism slidably connected to the outside of the sampling needle body, a micro-adjustment mechanism fixedly connected to the inside of the sampling needle handle shell, and a negative pressure mechanism slidably connected to the inside of the sampling needle handle shell.

[0007] The micro-adjustment mechanism includes a fixed connecting shaft, which is fixedly connected to the outside of the sampling needle body. Connecting blocks are fixedly connected to the upper and lower sides of the fixed connecting shaft. A sliding button is fixedly connected to the top of the connecting block. Guide mechanisms are fixedly connected to the left and right sides of the fixed connecting shaft. The negative pressure mechanism is fixedly connected to the left side of the fixed connecting shaft. A guide shaft is slidably connected inside the connecting block. A reset spring is fixedly connected to the right side of the connecting block. The other end of the reset spring is fixedly connected to the inside of the sampling needle handle housing.

[0008] As a further description of the above technical solution: the auxiliary positioning mechanism includes an auxiliary support block, which is slidably connected to the outside of the sampling needle body, and four support limiting blocks are fixedly connected inside the auxiliary support block, and the four support limiting blocks are slidably connected inside the sampling needle body.

[0009] As a further description of the above technical solution: the negative pressure mechanism includes a saline storage tank, which is fixedly connected inside the outer shell of the sampling needle handle. A sliding squeezing block is slidably connected inside the saline storage tank. A squeezing button is fixedly connected to the top of the sliding squeezing block. A second return spring is fixedly connected inside the squeezing button. The other end of the second return spring is fixedly connected to the top of the saline storage tank. A telescopic hose is fixedly connected to the bottom of the saline storage tank. A water outlet pipe is fixedly connected to the top of the saline storage tank. A water outlet cover is rotatably connected inside the water outlet pipe. A storage tank is provided inside the saline storage tank, and physiological saline is placed in the storage tank.

[0010] As a further description of the above technical solution: the guiding mechanism includes two sliding limit blocks, which are fixedly connected to the left side of the fixed connecting shaft. The sampling needle handle housing is fixedly connected to four auxiliary limit blocks, which are in pairs. The sliding limit blocks are slidably connected to the adjacent side of the two auxiliary limit blocks.

[0011] As a further description of the above technical solution: a sliding groove is provided inside the outer shell of the sampling needle handle, the connecting block is slidably connected in the sliding groove, and the fixed connecting shaft is slidably connected in the sliding groove;

[0012] As a further description of the above technical solution: the second reset spring has an internal mounting groove, the second reset spring is fixedly connected in the mounting groove, the top of the salt water storage tank has a through hole, and the squeeze button is slidably connected in the through hole;

[0013] As a further description of the above technical solution: sliding grooves are provided on the upper and lower sides of the inner surface of the sampling needle handle shell, and the sliding button is slidably connected in the sliding groove;

[0014] As a further description of the above technical solution: the outer side of the sampling needle body is provided with four sliding grooves, and the support limiting block is slidably connected in the sliding grooves.

[0015] This utility model has the following beneficial effects:

[0016] 1. In this utility model, during biopsy, the sampling needle body is inserted into the human body. During this process, the auxiliary support block contacts the skin to provide support and auxiliary positioning functions. When it approaches the kidney, the sliding button is pushed. The sliding button, together with the connecting block, drives the sampling needle body to slide, thereby performing micro-operation on the sampling needle body, thus avoiding excessive damage to the kidney due to excessive operation.

[0017] 2. In this utility model, pressing the squeeze button causes the sliding squeeze block to slide inside the saline storage tank, squeezing the physiological saline inside the saline storage tank into the telescopic hose, which then guides it into the interior of the sampling needle body. This avoids air from entering the kidney or vascular system during sampling biopsy, thus preventing air embolism and serious complications. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the precise positioning guide needle for renal biopsy proposed in this utility model;

[0019] Figure 2 This is a schematic diagram of the auxiliary support block for the precise positioning guide needle of the kidney biopsy proposed in this utility model;

[0020] Figure 3 This is a schematic diagram of the sliding limiting block of the precise positioning guide needle for renal biopsy proposed in this utility model.

[0021] Figure 4 This is a schematic diagram of the sliding button of the precise positioning guide needle for kidney biopsy proposed in this utility model.

[0022] Legend:

[0023] 1. Sampling needle handle housing; 2. Sampling needle body; 3. Auxiliary support block; 4. Fixed connecting shaft; 5. Connecting block; 6. Sliding button; 7. Guide shaft; 8. Reset spring one; 9. Sliding limit block; 10. Auxiliary limit block; 11. Telescopic hose; 12. Saline storage tank; 13. Sliding squeezing block; 14. Squeezing button; 15. Reset spring two; 16. Water outlet pipe; 17. Water outlet cover; 18. Support limit block. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Reference Figures 2 to 4 This utility model provides an embodiment of a precise positioning guide needle for kidney biopsy, comprising a sampling needle handle shell 1, which is the main body of the entire device, supporting the micro-adjustment mechanism and the negative pressure mechanism. The shell is made of durable and lightweight material to ensure convenience and comfort during operation. A sampling needle body 2 is slidably connected to the left side of the sampling needle handle shell 1. The sampling needle body 2 is the core component in the puncture process, directly participating in the puncture of tissue and sample collection. An auxiliary positioning mechanism is slidably connected to its exterior and is slidably connected to the shell, enabling the sampling needle body 2 to be accurately positioned during the biopsy. The auxiliary positioning mechanism is slidably connected to the exterior of the sampling needle body 2, and a micro-adjustment mechanism is fixedly connected inside the sampling needle handle shell 1. A negative pressure mechanism is slidably connected inside the sampling needle handle shell 1.

[0026] The auxiliary positioning mechanism includes an auxiliary support block 3, which is slidably connected to the outside of the sampling needle body 2. Four support limiting blocks 18 are fixedly connected inside the auxiliary support block 3. The four support limiting blocks 18 are slidably connected to the inside of the sampling needle body 2. Four sliding grooves are opened on the outside of the sampling needle body 2. The support limiting blocks 18 are slidably connected in the sliding grooves. The auxiliary positioning mechanism is connected to the outside of the sampling needle body 2 through the auxiliary support block 3 to help position and stabilize the direction of the sampling needle during puncture. The support limiting blocks 18 are slidably connected to the inside of the sampling needle body 2 and can be adjusted according to the actual situation to avoid the deviation of the sampling needle during puncture. The design of the sliding grooves allows the support limiting blocks 18 to move freely, providing a more accurate positioning effect.

[0027] The micro-adjustment mechanism includes a fixed connecting shaft 4, which is fixedly connected to the outside of the sampling needle body 2. Connecting blocks 5 are fixedly connected to the upper and lower sides of the fixed connecting shaft 4. A sliding button 6 is fixedly connected to the top of the connecting block 5. Guide mechanisms are fixedly connected to the left and right sides of the fixed connecting shaft 4. A negative pressure mechanism is fixedly connected to the left side of the fixed connecting shaft 4. A guide shaft 7 is slidably connected inside the connecting block 5. A return spring 8 is fixedly connected to the right side of the connecting block 5. The other end of the return spring 8 is fixedly connected to the inside of the sampling needle handle housing 1. A sliding groove is provided inside the sampling needle handle housing 1. The connecting block 5 slides... The fixed connecting shaft 4 is slidably connected to the sliding groove. The upper and lower sides of the inner surface of the sampling needle handle housing 1 are provided with sliding grooves. The sliding button 6 is slidably connected to the sliding groove. The micro-adjustment mechanism achieves fine adjustment through the fixed connecting shaft 4, the connecting block 5 and the sliding button 6, allowing doctors to fine-tune the position of the sampling needle during biopsy. Through the return spring 8, the connecting block 5 can move freely in the sliding groove, enabling fine adjustment to ensure accurate puncture. The guiding mechanism helps to limit the sliding path through the sliding limit blocks 9 fixed on both sides of the shaft, ensuring the stability and controllability of the micro-adjustment mechanism.

[0028] Reference Figure 1 , Figure 3 , Figure 4 The negative pressure mechanism includes a saline reservoir 12, which is fixedly connected inside the sampling needle handle housing 1. A sliding squeezing block 13 is slidably connected inside the saline reservoir 12. A squeezing button 14 is fixedly connected to the top of the sliding squeezing block 13. A second return spring 15 is fixedly connected inside the squeezing button 14, and the other end of the second return spring 15 is fixedly connected to the top of the saline reservoir 12. A telescopic hose 11 is fixedly connected to the bottom of the saline reservoir 12. A water outlet pipe 16 is fixedly connected to the top of the saline reservoir 12. A water outlet cover 17 is rotatably connected inside the water outlet pipe 16. A storage tank is provided inside the saline reservoir 12, and physiological saline solution is placed in the storage tank. The saline solution has an internal mounting groove for the second reset spring 15, which is fixedly connected to the mounting groove. The top of the saline storage tank 12 has a through hole, and the squeeze button 14 is slidably connected to the through hole. The negative pressure mechanism is mainly controlled by the saline storage tank 12, the sliding squeeze block 13, and the water outlet pipe 16. By operating the squeeze button 14, the second reset spring 15 can be reset after being pressed. The sliding squeeze block 13 adjusts the flow of saline solution in the saline storage tank 12 to ensure that tissue samples are aspirated by negative pressure during the puncture process. The telescopic hose 11 and the water outlet pipe 16 are used to provide channels for saline flow and drainage to avoid air bubbles and impurities interfering with sample collection during the biopsy process.

[0029] The guiding mechanism includes two sliding limit blocks 9, which are fixedly connected to the left sides of the fixed connecting shaft 4. Four auxiliary limit blocks 10 are fixedly connected inside the sampling needle handle housing 1. The four auxiliary limit blocks 10 are arranged in pairs. The sliding limit blocks 9 are slidably connected to the adjacent sides of the two auxiliary limit blocks 10. The guiding mechanism includes two sliding limit blocks 9 and four auxiliary limit blocks 10, which work together to ensure that the sampling needle does not deviate from the predetermined trajectory during puncture. The sliding limit blocks 9 are located on both sides of the fixed connecting shaft 4. By cooperating with the auxiliary limit blocks 10, they limit the sliding range of the sampling needle. This design ensures the accuracy of the guide needle and effectively prevents puncture errors caused by unnecessary deviation.

[0030] Working principle: Squeezing the squeeze button 14 pushes the sliding squeeze block 13 to slide, thereby squeezing the saline inside the saline storage tank 12 into the sampling needle body 2 through the telescopic hose 11, thereby expelling the air inside the sampling needle body 2 and preventing air from entering the body and causing air embolism, which can lead to serious complications.

[0031] Insert the sampling needle body 2 into the body. When it is close to the kidney, push the sliding button 6 on both sides of the sampling needle handle shell 1 to slide. Then, with the assistance of the connecting block 5, the fixed connecting shaft 4 will slide. The fixed connecting shaft 4 is fixedly connected to the sampling needle body 2, thereby pushing the sampling needle body 2 to slide. This allows for micro-operation of the sampling needle body 2, avoiding damage to the kidney due to excessive operation during sampling.

[0032] In the above sampling process summary, the design of the telescopic hose 11 at the rear side of the telescopic hose 11 prevents the sampling needle body 2 from separating from the telescopic hose 11 due to sliding. The guide shaft 7 provides guidance for the sliding of the connecting block 5. At the same time, the sliding limit block 9, with the cooperation of the auxiliary limit block 10, further provides guidance for the sliding of the sampling needle body 2.

[0033] After sampling is completed, release the sliding button 6. The reset spring 18 pushes the connecting block 5 to reset. Then, release the squeeze button 14. With the help of the reset spring 2 15, the squeeze button 14 is pushed to reset and the kidney tissue inside the sampling needle body 2 is drawn into the saline reservoir 12. Then, open the water outlet cover 17 to take out the saline, kidney tissue and fluid inside the kidney.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A precise positioning guide needle for kidney biopsy, comprising a sampling needle handle housing (1), characterized in that: The sampling needle body (2) is slidably connected to the left side of the sampling needle handle shell (1), and an auxiliary positioning mechanism is slidably connected to the outside of the sampling needle body (2). A micro-adjustment mechanism is fixedly connected to the inside of the sampling needle handle shell (1); a negative pressure mechanism is slidably connected to the inside of the sampling needle handle shell (1). The micro-adjustment mechanism includes a fixed connecting shaft (4), which is fixedly connected to the outside of the sampling needle body (2). Connecting blocks (5) are fixedly connected to the upper and lower sides of the fixed connecting shaft (4). A sliding button (6) is fixedly connected to the top of the connecting block (5). A guide mechanism is fixedly connected to the left and right sides of the fixed connecting shaft (4). The negative pressure mechanism is fixedly connected to the left side of the fixed connecting shaft (4). A guide shaft (7) is slidably connected inside the connecting block (5). A reset spring (8) is fixedly connected to the right side of the connecting block (5). The other end of the reset spring (8) is fixedly connected to the inside of the sampling needle handle shell (1).

2. The precise positioning guide needle for kidney biopsy according to claim 1, characterized in that: The auxiliary positioning mechanism includes an auxiliary support block (3), which is slidably connected to the outside of the sampling needle body (2). Four support limiting blocks (18) are fixedly connected inside the auxiliary support block (3), and the four support limiting blocks (18) are slidably connected inside the sampling needle body (2).

3. The precise positioning guide needle for kidney biopsy according to claim 1, characterized in that: The negative pressure mechanism includes a saline storage tank (12), which is fixedly connected inside the outer shell (1) of the sampling needle handle. A sliding squeezing block (13) is slidably connected inside the saline storage tank (12). A squeezing button (14) is fixedly connected to the top of the sliding squeezing block (13). A second return spring (15) is fixedly connected inside the squeezing button (14). The other end of the second return spring (15) is fixedly connected to the top of the saline storage tank (12). A telescopic hose (11) is fixedly connected to the bottom of the saline storage tank (12). A water outlet pipe (16) is fixedly connected to the top of the saline storage tank (12). A water outlet cover (17) is rotatably connected inside the water outlet pipe (16). A storage tank is provided inside the saline storage tank (12), and physiological saline is placed in the storage tank.

4. The precise positioning guide needle for renal biopsy according to claim 1, characterized in that: The guiding mechanism includes two sliding limit blocks (9), which are fixedly connected to the left sides of the fixed connecting shaft (4). The sampling needle handle housing (1) is fixedly connected to four auxiliary limit blocks (10), which are in pairs. The sliding limit blocks (9) are slidably connected to the adjacent side of the two auxiliary limit blocks (10).

5. The precise positioning guide needle for renal biopsy according to claim 1, characterized in that: The sampling needle handle housing (1) has a sliding groove inside, the connecting block (5) is slidably connected in the sliding groove, and the fixed connecting shaft (4) is slidably connected in the sliding groove.

6. The precise positioning guide needle for renal biopsy according to claim 3, characterized in that: The reset spring 2 (15) has an internal mounting groove, and the reset spring 2 (15) is fixedly connected in the mounting groove. The top of the salt water storage tank (12) has a through hole, and the squeeze button (14) is slidably connected in the through hole.

7. The precise positioning guide needle for renal biopsy according to claim 1, characterized in that: The sampling needle handle housing (1) has sliding grooves on the upper and lower sides inside, and the sliding button (6) is slidably connected in the sliding groove.

8. The precise positioning guide needle for renal biopsy according to claim 2, characterized in that: The sampling needle body (2) has four sliding grooves on its outside, and the support limiting block (18) is slidably connected in the sliding grooves.

Images