Ureter biopsy forceps with negative pressure suction function

Abstract

The invention discloses ureter biopsy forceps with a negative pressure suction function, and belongs to the field of medical instruments. Comprising a biopsy operation cavity, a collection cavity is slidably connected into the biopsy operation cavity, a fixed forceps handle is fixedly connected to the outer side wall of the biopsy operation cavity, a thumb clamping groove is fixedly connected to the outer side wall of the fixed forceps handle, a rotating block is fixedly connected to the outer side wall of the collection cavity, and a rotatable forceps handle is arranged on the outer side wall of the rotating block. The outer side wall of the rotatable forceps handle is fixedly connected with a finger clamping groove; according to the ureter biopsy forceps with the negative pressure suction function, through multi-structure collaborative design, precise tumor fixation is achieved through a negative pressure suction system, tissue cutting is controlled through a thumb clamping groove, a biopsy sample is conducted to the negative pressure suction pipe through the communicating pipe and the sample retention cavity through negative pressure, and then the biopsy sample is collected. The core problems that traditional biopsy forceps are difficult to sample, small in sampling amount and shallow in sampling depth and need to go in and out of the body repeatedly can be obviously solved.

Description

Technical Field

[0001] This invention relates to medical device technology, and more particularly to a ureteral biopsy forceps with negative pressure suction function. Background Technology

[0002] Early diagnosis of upper urinary tract urothelial carcinoma (UTUC) relies on ureteroscopy and biopsy, but current biopsy techniques have significant clinical drawbacks. Traditional rigid ureteroscope biopsy forceps are limited by the anatomical characteristics of the ureteral narrowing, resulting in a limited range of angle adjustment during examination. For papillary masses that are close to the ureteral wall or have a small diameter, the forceps often cannot reach the mass due to the inability to visualize the target area perpendicularly, and lens deviation can even cause the mass to leave the field of view, significantly reducing sampling accuracy. Furthermore, the small opening area of ​​traditional biopsy forceps results in a small sample volume per procedure, requiring repeated entry and exit from the ureteral lumen for multiple samplings. This not only increases the risk of mucosal damage and perforation and intraoperative pain for the patient but also increases the false negative rate in pathological examination due to sample detachment during the procedure, potentially missing early UTUC lesions. Furthermore, while flexible ureteroscopes allow for observation of masses by adjusting the lens angle, inserting biopsy forceps causes lens vibration, especially when the forceps pass through the distal end of the lens, exacerbating lens drift. The forceps also affect the lens's sensitivity, making precise grasping difficult. Additionally, the high frictional resistance of the forceps tip material causes jamming during rotation, further reducing operational stability. Moreover, regardless of whether a rigid or flexible ureteroscope is used with biopsy forceps, the biopsy sampling depth only reaches the ureteral mucosa, failing to meet the requirement of reaching the lamina propria of the ureteral wall, making it difficult to obtain tissue samples with complete pathological diagnostic value.

[0003] The aforementioned issues mean that existing technologies cannot meet the demand for precise biopsies of small, wall-attached masses in the upper urinary tract. Early identification of the benign or malignant nature and depth of invasion of the mass directly determines the choice of surgical approach and prognosis for patients. Therefore, there is an urgent need for a ureteral biopsy device that can overcome the limitations of the field of view and improve the accuracy and efficiency of sampling. Summary of the Invention

[0004] Purpose of the Invention: The purpose of this invention is to address the inaccuracy of traditional biopsy techniques for sampling adhering or small-volume papillary masses, reducing false negative rates in pathological testing due to sampling location deviations and insufficient sample volume. Another objective is to improve upon the drawbacks of traditional biopsy procedures, which require repeated entry and exit of the ureteral lumen, reducing the risk of mucosal damage and perforation caused by repeated stimulation. This also alleviates problems such as unstable field of view and tool jamming during the procedure, reducing perioperative patient discomfort and improving the safety and convenience of the biopsy procedure. Furthermore, the novel biopsy forceps can adjust the negative pressure suction intensity to sample the lamina propria of the ureteral wall mucosa, thereby determining the tumor stage.

[0005] Technical solution: A ureteral biopsy forceps with negative pressure suction function includes a biopsy operating chamber, a collection chamber slidably connected inside the biopsy operating chamber, and saline solution that can pass between the biopsy operating chamber and the collection chamber. A fixed forceps handle is fixedly connected to the outer wall of the biopsy operating chamber, and a thumb slot is fixedly connected to the outer wall of the fixed forceps handle. A rotating block is fixedly connected to the outer wall of the collection chamber, and a rotatable forceps handle is provided on the outer wall of the rotating block. A finger slot is fixedly connected to the outer wall of the rotatable forceps handle.

[0006] Furthermore, the outer side wall of the rotating block is symmetrically fixedly connected with short columns, the inner side wall of the rotatable pliers handle is symmetrically provided with rotating holes, the short columns are all rotatably connected to the interior of the adjacent rotating holes, the interior of the fixed pliers handle is provided with a cavity, and the inner side wall of the cavity is rotatably connected to the outer side wall of the rotatable pliers handle through a rotating component.

[0007] Furthermore, a biopsy port is provided on the right side of the inner wall of the biopsy operation chamber, and a collection port is provided on the right side of the inner wall of the collection chamber. A laser etching blade is fixedly connected to the inner wall of the collection port.

[0008] Furthermore, a negative pressure suction tube is fixedly connected to the rear surface of the collection cavity, and a sample retention cavity is fixedly connected to the left end of the negative pressure suction tube.

[0009] Furthermore, a porous titanium alloy filter screen is fixedly connected inside the sample retention chamber, and a connecting pipe is fixedly connected to the left side of the sample retention chamber, with a negative pressure control valve fixedly connected to the left side of the connecting pipe.

[0010] Furthermore, a saline injection port is provided on the left side of the biopsy operation chamber, and the saline injection port is fixedly connected to the infusion chamber through a pipe.

[0011] Beneficial effects: This ureteral biopsy forceps with negative pressure suction function is designed with multiple structures in synergy. The device uses a negative pressure suction system to accurately fix the tumor and controls the cutting of tissue through the thumb slot. The biopsy sample is conducted through the negative pressure through the connecting tube and the sample retention chamber to the negative pressure suction tube. It can significantly solve the core problems of traditional biopsy forceps, such as difficulty in sampling, small sample volume, shallow sampling depth, and the need for multiple insertions and removals from the body. First, the device utilizes a negative pressure suction system to precisely fix the tumor: the doctor adjusts the negative pressure control valve, and the negative pressure is transmitted through the connecting tube and sample retention chamber to the negative pressure suction tube. Under direct vision, a stable suction force is generated, firmly adhering to the wall or small-volume papillary tumors and adhering to the collection port and biopsy port. This avoids the sampling deviation caused by field of view drift and difficulty in tumor positioning in traditional biopsies, ensuring that the cutting area accurately corresponds to the target lesion tissue. Second, the laser etching blade and negative pressure suction operate simultaneously. At the moment of cutting, the tumor tissue is sucked into the sample retention chamber by negative pressure. The porous titanium alloy filter in the sample retention chamber can effectively block tissue samples and allow only liquids to pass through, further ensuring the integrity of the sample retention. This significantly increases the tissue volume and depth of a single sampling, reduces pathological detection errors caused by insufficient sample volume or sampling errors, and obtains lamina propria samples to determine tumor staging. When normal saline is continuously and in large quantities injected through the saline injection port, it can flush out bloodstains in the operating chamber, collection chamber and cutting area, keep the equipment clean and the field of vision clear, provide visual assurance for accurate sampling, and ultimately reduce the risk of false negatives and understaging in UTUC, providing reliable pathological basis for the formulation of subsequent diagnosis and treatment plans for patients. This device significantly improves the convenience and stability of biopsy procedures thanks to its user-friendly structural design and multifunctional integration. Its scientifically designed grip and precise linkage structure effectively avoid the common problem of clamp tip jamming in traditional biopsy forceps, allowing doctors to more smoothly locate and collect tissue during the procedure, greatly improving diagnostic efficiency. Simultaneously, the device uses saline lubrication to form a lubricating layer on the inner walls of the collection and biopsy operation chambers, reducing frictional resistance between components, extending instrument lifespan, and contributing to improved sampling efficiency. Furthermore, the blunt tip of the biopsy forceps and the biopsy port located on the side of the device further reduce potential damage to patient tissues during the procedure, ensuring greater safety and stability. The negative pressure suction and single-insertion design for multiple sampling eliminates the need for repeated insertion and removal of the instrument from the ureteral lumen, reducing the risk of complications such as perforation and infection, and significantly alleviating patient pain during the procedure and the burden of postoperative recovery. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the sample retention cavity of the present invention; Figure 3 This is a cross-sectional view of the biopsy operation chamber of the present invention; Figure 4 This is a schematic diagram of the overall structure of the fixing clamp handle of the present invention.

[0013] In the diagram: 1. Biopsy operation chamber; 2. Collection chamber; 3. Fixed forceps handle; 4. Thumb slot; 5. Rotating block; 6. Rotatable forceps handle; 7. Short column; 8. Rotating hole; 9. Cavity; 10. Biopsy port; 11. Collection port; 12. Laser etched blade; 13. Negative pressure suction tube; 14. Sample retention chamber; 15. Porous titanium alloy filter; 16. Connecting tube; 17. Negative pressure control valve; 18. Infusion chamber; 19. Saline injection port; 20. Finger slot. Detailed Implementation

[0014] To make the technical solution of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0015] Example like Figure 1-4 As shown, a ureteral biopsy forceps with negative pressure suction function is provided, including a biopsy operating chamber 1, a collection chamber 2 slidably connected inside the biopsy operating chamber 1, a fixed forceps handle 3 fixedly connected to the outer wall of the biopsy operating chamber 1, a thumb groove 4 fixedly connected to the outer wall of the fixed forceps handle 3, a rotating block 5 fixedly connected to the outer wall of the collection chamber 2, a rotatable forceps handle 6 provided on the outer wall of the rotating block 5, a finger groove 20 fixedly connected to the outer wall of the rotatable forceps handle 6, short posts 7 symmetrically fixedly connected to the outer wall of the rotating block 5, rotating holes 8 symmetrically opened on the inner wall of the rotatable forceps handle 6, each of the short posts 7 being rotatably connected to the interior of an adjacent rotating hole 8, a cavity 9 opened inside the fixed forceps handle 3, and the inner wall of the cavity 9 being connected to the rotatable forceps handle 6. The outer wall of the handle 6 is rotatably connected by a rotating component. A biopsy port 10 is provided on the right side of the inner wall of the biopsy operation chamber 1. A collection port 11 is provided on the right side of the inner wall of the collection chamber 2. A laser etching blade 12 is fixedly connected to the inner wall of the collection port 11. A negative pressure suction tube 13 is fixedly connected to the rear surface of the collection chamber 2. A sample retention chamber 14 is fixedly connected to the left end of the negative pressure suction tube 13. A porous titanium alloy filter screen 15 is fixedly connected inside the sample retention chamber 14. A connecting tube 16 is fixedly connected to the left side of the sample retention chamber 14. A negative pressure control valve 17 is fixedly connected to the left side of the connecting tube 16. A saline injection port 19 is provided on the left side of the biopsy operation chamber 1. The saline injection port 19 is fixedly connected to the infusion chamber 18 through a pipe. Before operation, the equipment debugging and pipeline connection must be completed: connect the negative pressure suction device to the negative pressure control valve 17, ensure that the porous titanium alloy filter 15 in the sample retention chamber 14 is installed firmly, and connect the saline supply system through the saline injection port 19 so that the infusion chamber 18 is in the state of ready infusion. When the doctor holds the instrument, the thumb is inserted into the thumb slot 4 of the fixed forceps 3, and the index and middle fingers are inserted into the finger slots 20 of the rotatable forceps 6. The doctor adjusts the position of the instrument by gripping the force, and slowly pushes the biopsy operation chamber 1 along the ureteral lumen to the target biopsy site. The biopsy port 10 is aligned with the lesion tissue area. After confirming accurate positioning, the doctor controls the rotatable forceps 6 by opening and closing the fingers. Since the rotatable forceps 6 is rotatably connected to the short post 7 of the rotating block 5 through the rotating hole 8, and the rotating block 5 is fixed to the outer wall of the collection chamber 2, and the fixed forceps 3 and the rotatable forceps 6 are linked by the rotating part in the cavity 9, when the rotatable forceps 6 closes inward, it will drive the collection chamber 2 to slide in the biopsy operation chamber 1, so that the collection port 11 of the collection chamber 2 is precisely aligned with the biopsy port 10 of the biopsy operation chamber 1. At this point, the negative pressure control valve 17 is opened, and negative pressure is transmitted to the sample retention chamber 14 through the connecting tube 16. The negative pressure acts on the inside of the collection chamber 2 through the negative pressure suction tube 13, and the tissue is quickly adsorbed into the collection port 11. The laser etching blade 12 on the inner wall of the collection port 11 quickly cuts the diseased tissue. The cut sample is transported to the sample retention chamber 14 through the negative pressure airflow. After the sample enters the sample retention chamber 14, the porous titanium alloy filter 15 traps and retains the tissue sample, preventing it from entering the negative pressure pipeline with the airflow, while allowing the airflow to pass normally to ensure the stable operation of the negative pressure system. After collection is completed, the negative pressure control valve 17 is closed, and the rotatable forceps 6 is operated to move the collection chamber 2 back to its original position, and the instrument is slowly withdrawn from the ureter. After withdrawal, the trapped tissue sample can be taken out through the opening of the sample retention chamber 14 for subsequent pathological testing. If it is necessary to clean the cavity or moisten the tissue during the operation, physiological saline can be injected into the infusion cavity 18 through the saline injection port 19. The physiological saline is then transported through the pipeline to the inside of the biopsy operation cavity 1 to achieve the auxiliary functions of cavity flushing or tissue moistening.

[0016] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A ureteral biopsy forceps with negative pressure suction function, comprising a biopsy operating chamber (1), characterized in that: The biopsy operation chamber (1) is slidably connected to a collection chamber (2). Saline solution can pass between the biopsy operation chamber (1) and the collection chamber (2). A fixed forceps handle (3) is fixedly connected to the outer wall of the biopsy operation chamber (1). A thumb slot (4) is fixedly connected to the outer wall of the fixed forceps handle (3). A rotating block (5) is fixedly connected to the outer wall of the collection chamber (2). A rotatable forceps handle (6) is provided on the outer wall of the rotating block (5). A finger slot (20) is fixedly connected to the outer wall of the rotatable forceps handle (6).

2. The ureteral biopsy forceps with negative pressure suction function according to claim 1, characterized in that: The outer side wall of the rotating block (5) is symmetrically fixed with short columns (7), and the inner side wall of the rotatable clamp handle (6) is symmetrically provided with rotating holes (8). The short columns (7) are all rotatably connected to the interior of the adjacent rotating holes (8). The interior of the fixed clamp handle (3) is provided with a cavity (9), and the inner side wall of the cavity (9) is rotatably connected to the outer side wall of the rotatable clamp handle (6) through a rotating component.

3. A ureteral biopsy forceps with negative pressure suction function according to claim 1, characterized in that: The biopsy operation chamber (1) has a biopsy port (10) on the right side of its inner wall, and the collection chamber (2) has a collection port (11) on the right side of its inner wall. The inner wall of the collection port (11) is fixedly connected to a laser etching blade (12).

4. A ureteral biopsy forceps with negative pressure suction function according to claim 1, characterized in that: The rear surface of the collection chamber (2) is fixedly connected to a negative pressure suction tube (13), and the left end of the negative pressure suction tube (13) is fixedly connected to a sample retention chamber (14).

5. A ureteral biopsy forceps with negative pressure suction function according to claim 4, characterized in that: The sample retention chamber (14) is fixedly connected to a porous titanium alloy filter screen (15), and a connecting pipe (16) is fixedly connected to the left side of the sample retention chamber (14). A negative pressure control valve (17) is fixedly connected to the left side of the connecting pipe (16).

6. A ureteral biopsy forceps with negative pressure suction function according to claim 1, characterized in that: The left side of the biopsy operation chamber (1) is provided with a saline injection port (19), and the saline injection port (19) is fixedly connected to the infusion chamber (18) through a pipe.

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