Biopsy forceps assembly for ERCP endoscope

Abstract

The invention discloses a biopsy forceps assembly for an ERCP endoscope, and belongs to the technical field of biopsy forceps. Comprising biopsy forceps; the biopsy temporary storage disc comprises a transparent shell with an eccentric channel and a rotary disc rotationally installed in the shell, the upper end face of the rotary disc is provided with a plurality of storage grooves and at least one through hole which are located in the same circumference, and a lower port of the eccentric channel is fixed to the working channel; and the hollow locking piece is mounted at the upper port of the eccentric channel and can fix or release the biopsy forceps. The operating rod of the biopsy forceps is clamped and fixed through the hollow locking piece, so that body fluid carried by the forceps head of the biopsy forceps is prevented from dripping and polluting the operating environment, and the pollution risk is reduced; the biopsy tissue is directly stored in the storage groove of the biopsy temporary storage disc under the condition that the forceps head is not separated, so that the forceps can immediately return to the body to carry out secondary biopsy sampling, tedious processes such as extraction, sample placement and reinsertion are not needed, and the efficiency of multiple biopsy sampling is improved.

Description

Technical Field

[0001] This invention relates to a biopsy forceps assembly for ERCP endoscopes, belonging to the field of biopsy forceps technology. Background Technology

[0002] In ERCP (Endoscopic Retrograde Cholangiopancreatography) examinations and treatments, biopsy forceps are commonly used sampling tools, primarily for obtaining tissue samples from the biliary tract or pancreas. Clinical operation of biopsy forceps relies on the endoscopic working channel for instrument delivery and positioning; tissue is grasped by opening and closing the forceps head, making it a crucial means of determining the nature of biliary tract and pancreatic lesions. The basic structure of existing biopsy forceps includes a forceps head, operating cable, and control handle, which can meet basic tissue sampling needs.

[0003] For example, Chinese patent application number CN200510130186.3 describes an endoscope device and components connectable to an endoscope handpiece. Accessories (including biopsy forceps) are inserted into the working channel opening. After tissue is grasped, the biopsy forceps need to be completely withdrawn from the endoscope's working channel. The tissue is then placed in a sample vial containing formalin fixative and labeled. The physician then needs to reinsert the biopsy forceps into the endoscope channel for the next biopsy. While this procedure completes tissue sampling, the withdrawal of the biopsy forceps from the endoscope's working channel presents several challenges. First, each complete withdrawal and reinsertion of the biopsy forceps increases surgical time and affects overall efficiency, especially when multiple biopsies are required; repeated operations may prolong the procedure. Second, during withdrawal, the biopsy forceps may carry bile, blood, or tissue fluid, which could drip and contaminate the operating environment. Therefore, there is still room for optimization in the existing biopsy forceps usage to improve sampling efficiency and reduce the risk of contamination.

[0004] To address the aforementioned issues, an improved biopsy forceps assembly was designed. This design allows the forceps tip to remain partially connected to the endoscope after tissue collection, without needing to be completely withdrawn from the working channel. Simultaneously, it facilitates the transfer of biopsy tissue from the forceps tip to the sample vial. Furthermore, this assembly employs a sealed structure to prevent tissue fluid leakage. These improvements make the endoscopic biopsy process under ERCP more efficient and safer. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a biopsy forceps assembly for ERCP endoscopes, which solves the problem that when biopsy forceps are used for multiple biopsy sampling, biopsy tissue needs to be repeatedly removed and stored, resulting in low operation efficiency and increased risk of contamination spillage.

[0006] The technical problem to be solved by this invention is achieved by the following technical solution:

[0007] An ERCP endoscope biopsy forceps assembly includes biopsy forceps that enter the body through the working channel of the endoscope, and further includes:

[0008] A biopsy temporary storage tray includes a transparent housing with an eccentric channel and a turntable rotatably mounted inside the housing. The upper end face of the turntable has multiple storage slots and at least one through hole located on the same circumference. The lower end of the eccentric channel is fixed on the working channel. Initially, the through hole, the working channel, and the eccentric channel are located on the same axis.

[0009] A hollow locking element is installed at the upper port of the eccentric channel and can fix or release the biopsy forceps.

[0010] As a preferred example, the center of the turntable is fixed to a knob outside the housing via a connecting shaft.

[0011] As a preferred example, the upper end of the turntable is covered with a rubber layer that closely abuts against the inner wall of the housing.

[0012] As a preferred example, the hollow locking member includes an adjustable annular fastener and a transparent observation tube connected between the adjustable annular fastener and the upper port of the eccentric channel.

[0013] As a preferred example, the lower port of the transparent observation tube is screwed to the upper port of the eccentric channel.

[0014] As a preferred example, the adjustable annular fastener includes an annular housing with a hollow hole, and a clamping airbag with a variable diameter fixed in the hollow hole, the clamping airbag having an inflation / deflation port.

[0015] As a preferred embodiment, the upper port of the transparent observation tube is equipped with a magnetic annular fixing plate, the annular shell has a built-in magnetic suction plate, and the bottom end of the annular shell is magnetically fixed to the annular fixing plate.

[0016] As a preferred embodiment, a water-blocking membrane is fixed to the lower port of the annular fixing piece, and the water-blocking membrane has an elastic opening in the middle.

[0017] As a preferred example, a measuring tape is mounted on the side of the annular fixing plate, and the end of the measuring tape is connected to the annular housing.

[0018] As a preferred example, the number of storage slots is the same as the number of through holes and they are spaced apart, wherein the storage slots are marked with numbers.

[0019] The beneficial effects of this invention are:

[0020] 1. When the biopsy forceps are slowly withdrawn from the working channel to the biopsy temporary storage tray, the operating rod of the biopsy forceps is clamped and fixed by the hollow locking device to prevent the body fluid on the forceps head from dripping and contaminating the operating environment, thereby reducing the risk of contamination.

[0021] 2. The biopsy forceps are locked by a hollow locking device. Without detaching the forceps head, the biopsy tissue is directly stored in the storage slot of the biopsy temporary storage tray. This allows for immediate return to the body for a second biopsy sampling, eliminating the need for cumbersome processes such as extraction, sample placement, and re-insertion, thus improving the efficiency of multiple biopsy sampling.

[0022] 3. During the procedure, once the biopsy forceps head is fixed, it does not require multiple people to hold it, reducing manpower support; at the same time, the forceps head will not be contaminated by contact with the external environment, thus avoiding waste due to contamination.

[0023] 4. This component can be used not only during biopsy, but also with guidewires, imaging tubes, dilation tubes, etc., through the use of hollow locking parts and measuring tape. The length of the prefabricated stent can be measured by pulling the measuring tape to ensure the accuracy of stent placement in ERCP. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention in conjunction with an endoscope;

[0025] Figure 2 This is a schematic diagram of the biopsy forceps.

[0026] Figure 3 A schematic diagram of the structure in which biopsy forceps are inserted into the working channel via a hollow locking device and a biopsy temporary storage disk;

[0027] Figure 4 This is a schematic diagram of the internal structure of the biopsy temporary storage disk;

[0028] Figure 5 This is a schematic diagram of the end face of the hollow locking component;

[0029] Figure 6 A schematic diagram of a structure in which the forceps head is placed in a transparent observation tube after the hollow locking component is fixed in place by the biopsy forceps.

[0030] Figure 7 This is a schematic diagram showing the various accessories for replacing the biopsy forceps in this component;

[0031] Figure 8 This is a schematic diagram of the structure for measuring guidewire length.

[0032] In the picture:

[0033] 1. Endoscope; 101. Working passage;

[0034] 2. Biopsy forceps; 201. Operating handle; 202. Operating lever; 203. Forceps head; 204. Guide wire; 205. Imaging tube; 206. Dilatation tube; 207. Biopsy tissue;

[0035] 3. Biopsy temporary storage tray; 301. Eccentric channel; 302. Housing; 303. Turntable; 304. Storage slot; 305. Through hole; 306. Connecting shaft; 307. Knob; 308. Rubber layer;

[0036] 4. Hollow locking component; 401. Adjustable ring fastener; 4011. Ring housing; 4012. Clamping airbag; 4013. Inflation / depression port; 402. Transparent observation tube; 4021. Ring fixing plate; 4022. Water-resistant membrane; 403. Measuring tape; 4031. Measuring tape. Detailed Implementation

[0037] To facilitate a clear understanding of the technical means, creative features, objectives, and effects of this invention, the invention will be further described below in conjunction with specific illustrations.

[0038] like Figure 1 , Figure 2 As shown, the biopsy forceps assembly for this ERCP endoscope includes a biopsy forceps 2, which consists of an operating handle 201, an operating lever 202, and a forceps head 203. The operating handle 201 controls the opening and closing of the forceps head 203 through the operating lever 202 to grasp and release biopsy tissue 207. It also includes a biopsy storage tray 3 for storing biopsy tissue 207, and a hollow locking member 4 for fixing the biopsy forceps 2.

[0039] like Figure 3 , Figure 4 As shown, the biopsy storage tray 3 includes a transparent housing 302 with an eccentric channel 301, and a turntable 303 rotatably mounted within the housing 302. The transparent housing 302 allows the operator to easily observe the position and status of the turntable 303. The upper surface of the turntable 303 has multiple storage slots 304 and at least one through hole 305 located on the same circumference, wherein the storage slots 304 are used to temporarily store biopsy tissue 207 collected for each biopsy. The through hole 305 is used for the entry and retraction of surgical instruments such as biopsy forceps 2. The lower end of the eccentric channel 301 is fixed to the working channel 101. Initially, the through hole 305, the working channel 101, and the eccentric channel 301 are located on the same axis so that instruments can enter the body through the eccentric channel 301, the through hole 305, and the working channel 101.

[0040] In some embodiments, the rotation structure of the biopsy temporary storage tray 3 is manually operated, with the center of the turntable 303 fixed to a knob 307 outside the housing 302 via a connecting shaft 306. The operator rotates the knob 307 to rotate the desired storage slot 304 or through hole 305 to the coaxial position of the working channel 101 for corresponding insertion or storage operations.

[0041] In other embodiments, in addition to manual rotation, the turntable 303 can be automatically rotated to the preset numbered storage slot 304 via electric drive. Specifically, the knob 307 can be replaced by a miniature geared stepper motor to achieve automated control of the turntable 303 in conjunction with the endoscope 1 system.

[0042] In some embodiments, the upper end of the turntable 303 is covered with a rubber layer that tightly abuts against the inner wall of the housing 302. The turntable 303 will not easily rotate without external force and can also independently isolate and seal each storage slot 304.

[0043] like Figure 5 , Figure 6 As shown, the hollow locking member 4 is installed at the upper port of the eccentric channel 301 and can fix or release the biopsy forceps 2. The hollow locking member 4 includes an adjustable annular fastener 401 and a transparent observation tube 402 connected between the adjustable annular fastener 401 and the upper port of the eccentric channel 301. The lower port of the transparent observation tube 402 is screwed to the upper port of the eccentric channel 301 so that the biopsy tissue 207 inside can be easily removed sequentially from the upper port of the eccentric channel 301 after disassembly. The adjustable annular fastener 401 includes an annular housing 4011 with a hollow hole and a clamping airbag 4012 with a variable aperture fixed in the hollow hole. The clamping airbag 4012 has an inflation / deflation port 4013, which can be connected to an inflatable airbag. By manually pressing the inflatable airbag with a one-way valve, gas is injected into the clamping airbag 4012, gradually reducing the hollow aperture. A water-resistant membrane 4022 is fixed to the lower end of the annular fixing plate 4021. The water-resistant membrane 4022 has an elastic opening in the middle. When instruments such as biopsy forceps 2 pass through the water-resistant membrane 4022, the elastic opening can be expanded. When the instruments are withdrawn, because the elastic opening tightly surrounds the instruments, it can block body fluids on the outer wall of the instruments below the water-resistant membrane 4022, preventing body fluids from overflowing and causing contamination. The clamping airbag 4012 can clamp and fix instruments of different diameters.

[0044] Steps for performing multiple biopsies using this component:

[0045] 1. During a biopsy, the forceps 203 and operating rod 202 of the biopsy forceps 2 enter the human body through the hollow locking member 4, the biopsy storage tray 3 and the working channel 101 of the endoscope 1. With the help of the endoscope 1, the biopsy forceps 2 is used to grasp the biopsy tissue 207.

[0046] 2. Sampling, removal and fixation: After clamping the biopsy tissue 207, slowly withdraw the biopsy forceps 2 from the working channel 101 until the forceps head 203 and the biopsy tissue 207 are completely inserted into the transparent observation tube 402. Then, manually press the inflatable balloon to inflate the clamping balloon 4012 through the inflation / deflation interface 4013. The hollow diameter of the clamping balloon gradually shrinks, clamping the operating rod 202.

[0047] 3. To store the biopsy tissue 207, manually rotate the turntable 303 using the knob 307 so that storage slot 304, numbered 1 on the turntable 303, is aligned with the eccentric channel 301. Then, control the release of the forceps head 203 of the biopsy forceps 2 to place the biopsy tissue 207 into storage slot 1 304. After placement, rotate storage slot 1 304 to one side so that the through hole 305 returns to the coaxial position of the eccentric channel 301.

[0048] 4. Secondary biopsy sampling: After the first biopsy sample is stored, open the inflation / deflation port 4013 of the clamping airbag 4012 to release the gas, causing the operating lever 202 of the biopsy forceps 2 to become loose. The operator then reinserts the released biopsy forceps 2 into the human body to perform the second biopsy sampling. Repeat steps 2 and 3 above until all biopsy sampling is completed.

[0049] 5. The biopsy tissue 207 is removed, and according to the number of the storage tank 304, each biopsy tissue 207 is placed into a sample bottle filled with formalin fixative and labeled.

[0050] During the biopsy sampling process described above, the operating lever 202 of the biopsy forceps 2 is clamped and fixed by the hollow locking member 4. The forceps head 203 of the biopsy forceps 2 will not completely separate from the working channel 101 of the endoscope 1. The temporary storage of the sample for each biopsy can be completed inside the endoscope, which can prevent the body fluid on the forceps head 203 from dripping and contaminating the operating environment, thus reducing the risk of infection. Furthermore, even with the forceps head 203 not completely detached, after the biopsy tissue 207 is placed, it is convenient for the biopsy forceps 2 to immediately return to the body for a second biopsy sampling, without having to go through the cumbersome process of extraction, sample placement, and reinsertion, thus improving the efficiency of multiple biopsy sampling.

[0051] In current biopsy procedures, after successful biopsy sampling, removing the forceps head 203 of the biopsy forceps 2 and placing the biopsy tissue 207 into the sample vial requires the assistance of multiple people. For example, someone needs to hold the forceps head 203 of the biopsy forceps 2, someone needs to support the sample vial, and someone needs to use gauze to catch any dripping bodily fluids. This component, however, does not require the assistance of multiple people. Since the forceps head 203 does not detach from the endoscope 1, the above steps can be completed by a single person, reducing manpower requirements. Furthermore, the forceps head 203 will not be contaminated by contact with the external environment, thus avoiding waste due to contamination.

[0052] In some embodiments, the number of storage slots 304 and through holes 305 are the same and spaced apart, with each storage slot 304 marked with a number. In actual operation, for ease of identification and operation, the turntable 303 can always be rotated in one direction, allowing for the next operation after rotating each hole / slot. For example, following clockwise numbering: initially, through hole 305 is located at the eccentric channel 301, allowing instruments to enter; for storage, rotate clockwise to storage slot 1 304, and after storage, continue clockwise to the next through hole 305; and so on, rotating clockwise to storage slot 2 304, through hole 305, storage slot 304 304, through hole 305, until all biopsy samples are collected. The number of storage slots 304 and through holes 305 is generally required to be greater than the number of biopsies performed in each operation. However, if too many biopsy samples are taken and the number of storage slots 304 is insufficient, the biopsy forceps 2 can be removed from this component, and then a new component can be quickly replaced. The biopsy forceps 2 can then be reinserted (a new biopsy forceps 2 can be selected) to perform sampling again.

[0053] like Figure 7 , Figure 8 As shown, this component can also provide technical support for common instruments that enter the human body through the working channel 101 of the endoscope 1, including biopsy forceps 2, guidewire 204, imaging tube 205, dilation tube 206, etc.

[0054] The core function of guidewire 204 is guidance and positioning. After entering the body through endoscope channel 1, it can accurately reach the target area (such as narrowed digestive tract, bile duct, etc.), opening a path for subsequent instruments such as contrast tube 205 and dilation tube 206, and avoiding tissue damage caused by blind advancement of instruments.

[0055] The contrast tube 205 is primarily used for contrast imaging and media delivery. It is usually guided to the target area via guide wire 204, where contrast agent is injected. With the help of imaging equipment such as X-rays, luminal structures (such as blood vessels and bile ducts) that cannot be directly observed in the body are clearly visualized, helping doctors determine the location, extent, and morphology of lesions.

[0056] The dilator 206's core function is to dilate the narrowed lumen. After reaching the narrowed site under the guidance of guidewire 204, it gradually opens the narrowed passage (such as esophageal stricture or intestinal anastomotic stricture) by inflating, injecting water, or mechanical dilation, restoring the patency of the lumen and creating conditions for subsequent treatment or examination.

[0057] In some embodiments, to facilitate the measurement of the length of narrow sections and to subsequently place the appropriate length of the prefabricated support, ensuring the accuracy of support placement during ERCP, a magnetic annular fixing plate 4021 is mounted on the upper port of the transparent observation tube 402. A magnetic absorbing plate is built into the annular housing 4011, and the bottom end of the annular housing 4011 is magnetically fixed to the annular fixing plate 4021. A measuring tape 403 is mounted on the side of the annular fixing plate 4021, and the end of the tape 4031 is connected to the annular housing 4011.

[0058] This component, used in conjunction with guidewire 204, is used to measure the length of narrow lumens.

[0059] 1. Insert the guidewire 204 into the lumen of the human body through the working channel 101 of the endoscope 1, so that the tip of the guidewire 204 passes through the narrow section and reaches the distal normal lumen, and then slowly withdraw the guidewire 204.

[0060] 2. When the tip of the guidewire 204 just enters the proximal end of the narrow segment, the guidewire 204 is tightly clamped by the clamping airbag 4012. At this time, the annular housing 4011 is separated from the annular fixing piece 4021 by the external force applied manually to overcome the magnetic force. The annular housing 4011 and the guidewire 204 are slowly removed together without relative displacement. At this time, the tape 4031 of the measuring tape 403 is pulled out from the 0 mark end.

[0061] 3. When the tip of the guidewire 204 just passes through the distal end of the stenosis, the value recorded by the measuring tape 403 at this time is the length of the stenosis, which provides a reference for the length of the stent in ERCP.

[0062] The above description outlines the main technical features, basic principles, and beneficial effects of this invention. The scope of protection claimed by this invention is defined by the appended claims and their equivalents. Those skilled in the art should understand that this invention is not limited to the above embodiments, and various equivalent changes can be made without departing from the spirit and description of this invention; these equivalent changes will also fall within the scope of protection of this invention.

Claims

1. A biopsy forceps assembly for use with an ERCP endoscope, comprising a biopsy forceps (2) which enters the body through a working channel (101) of the endoscope (1), characterized in that, Also included are: A biopsy temporary storage tray (3) comprising a transparent housing (302) with an eccentric channel (301) and a rotating disc (303) rotatably mounted in the housing (302), the upper end surface of the rotating disc (303) having a plurality of storage slots (304) and at least one through hole (305) located on the same circumference, and the lower end of the eccentric channel (301) being fixed on the working channel (101); A hollow locking member (4) mounted at the upper end of the eccentric channel (301) and capable of fixing or releasing the biopsy forceps (2).

2. The ERCP biopsy forceps assembly according to claim 1, wherein, The middle part of the rotating disc (303) is fixed with a knob (307) outside the housing (302) through a connecting shaft (306).

3. The ERCP biopsy forceps assembly of claim 1, wherein, The upper end surface of the rotating disc (303) is covered with a rubber layer (308) tightly abutting against the inner wall of the housing (302).

4. The ERCP biopsy forceps assembly of claim 1, wherein, The hollow locking member (4) comprises an adjustable annular fastener (401) and a transparent observation tube (402) connected between the adjustable annular fastener (401) and the upper end of the eccentric channel (301).

5. The ERCP biopsy forceps assembly of claim 4, wherein, The lower end of the transparent observation tube (402) is screwed at the upper end of the eccentric channel (301).

6. The ERCP biopsy forceps assembly of claim 4, wherein, The adjustable annular fastener (401) comprises an annular housing (4011) with a hollow hole and a clamping air bag (4012) with variable aperture fixed in the hollow hole, the clamping air bag (4012) having a gas charging and discharging interface (4013).

7. The ERCP biopsy forceps assembly of claim 6, wherein, The upper end of the transparent observation tube (402) is mounted with a magnetic annular fixing sheet (4021), the annular housing (4011) is internally provided with a magnetic attracting sheet, and the bottom end of the annular housing (4011) is magnetically fixed on the annular fixing sheet (4021).

8. The ERCP biopsy forceps assembly according to claim 7, wherein, The lower end of the annular fixing sheet (4021) is fixed with a water blocking film (4022), the middle part of the water blocking film (4022) is provided with an elastic opening.

9. The ERCP biopsy forceps assembly of claim 7, wherein, The side surface of the annular fixing sheet (4021) is mounted with a tape measure (403), and the end of the tape (4031) of the tape measure (403) is connected with the annular housing (4011).

10. The ERCP biopsy forceps assembly of claim 1, wherein, The number of the storage slots (304) is the same as that of the through holes (305) and they are arranged at intervals, and the storage slots (304) are marked with numbers.

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