A polypectomy device

Abstract

The present invention discloses a polypectomy instrument, which adds an injection function component on the basis of a cutting function component, so that a polyp injection and protrusion process can be performed before the snare of the cutting function component snares the tissue, and the tissue can be snared quickly and accurately, thereby effectively improving the reliability of the operation of the polypectomy instrument and improving work efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices and relates to a polypectomy device used in non-vascular cavities such as the digestive tract. Background Art

[0002] Polypectomy instruments are mainly used for the removal of various polyps and excess tissues under endoscopy with the help of high-frequency electricity.

[0003] Among them, the most common polypectomy instrument is the snare, which is a device that uses a nylon rod to tighten a sliding knot previously tied with absorbable or synthetic thread to ligate blood vessels, polyps or other tubular structures. It is easy to operate and has been used in many laparoscopic abdominal surgeries.

[0004] However, during conventional resection instrument operation, tissue slippage may occur during the process of the loop encircling the diseased tissue, requiring multiple looping operations, which takes a long time and affects the surgical effect.

[0005] It can be seen that there is an urgent clinical need for a safe, fast and non-slip medical polypectomy instrument to replace the existing conventional removal instruments. Summary of the invention

[0006] Aiming at the problems existing in the existing polypectomy instruments, a new polypectomy instrument with reliable operation is needed.

[0007] Therefore, the technical problem to be solved by the present invention is to provide a polypectomy instrument, which has high operational reliability and can greatly improve work efficiency.

[0008] In order to achieve the above-mentioned purpose, the polypectomy instrument provided by the present invention includes a cutting function component and an injection function component.

[0009] Preferably, the injection function component and the cutting function component are arranged in parallel.

[0010] Preferably, the cutting function component includes a head operating end and a cutting operating end, the cutting operating end includes an outer tube, a wire rope, and a snare, the outer tube is connected to the head operating end, the snare is passed through the outer tube, and is connected to the head operating end through the wire rope.

[0011] Preferably, the snare is provided with an anti-slip structure.

[0012] Preferably, the anti-slip structure is formed by arranging a plurality of insulating coils.

[0013] Preferably, a guide head is provided on the snare.

[0014] Preferably, the guide head is in a "V" shape.

[0015] Preferably, the head operating end includes a mother finger ring, a finger ring, a guide joint, an electrode joint, an electrode clamping column and a booster tube. The mother finger ring is connected to the outer tube via a guide joint. The finger ring is mounted on the mother finger ring and can move axially relative to the mother finger ring. The electrode clamping column is inserted in the finger ring. The tail end of the booster tube and the electrode clamping column are connected to the finger ring. The top end of the booster tube is connected to the outer tube via a guide joint. The electrode joint is placed in the finger ring and cooperates with the booster tube to move relative to it. The electrode joint is connected to the wire rope via the booster tube and the guide joint.

[0016] Preferably, the injection function component includes a Luer connector, a control sleeve, a connecting inner tube and a needle tube. The Luer connector is movably inserted in the control sleeve and connected to the outer tube in the cutting operation end through the control sleeve. The needle tube is placed in the outer tube relative to the snare and is connected to the Luer connector through the connecting inner tube.

[0017] Preferably, a travel limiting mechanism is provided between the Luer connector and the control sleeve.

[0018] Preferably, the outer tube includes a snare hole and an injection hole.

[0019] The polypectomy instrument provided by the present invention adds an injection function component on the basis of the cutting function component, so that the polyp injection and protrusion process can be performed before the snare of the cutting function component snares the tissue, and the tissue can be snared quickly and accurately, thereby effectively improving the reliability of the operation of the polypectomy instrument and improving work efficiency.

[0020] On this basis, the present invention further adds an anti-slip structure outside the snare, and the anti-slip structure is composed of multiple insulating coils arranged to make the snare as a whole rough, achieve the effect of anti-slipping, and make it easier to snare the tissue for cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0022] Figure 1 is a schematic diagram of the structure of a polypectomy instrument according to an embodiment of the present invention;

[0023] Figure 2 Schematic diagram of the installation structure of the electrode connector and the electrode clamp column in an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of a finger ring in an embodiment of the present invention;

[0025] Figure 4 for Figure 3 Cross-sectional view in the BB direction;

[0026] Figure 5 This is a schematic diagram of the structure of the outer tube in an embodiment of the present invention;

[0027] Figure 6 This is a connection diagram of a Luer connector in an embodiment of the present invention;

[0028] Figure 7 Schematic diagram of the cooperation between the Luer connector and the control sleeve in an embodiment of the present invention;

[0029] Figure 8 for Figure 7 Section view in AA direction;

[0030] Fig. 9 for Figure 8 A magnified schematic diagram of part B;

[0031] Fig.10 It is a schematic diagram of the injection operation of the polypectomy instrument in the embodiment of the present invention;

[0032] Fig.11 It is a schematic diagram of the snare cutting operation performed by the polypectomy instrument in an embodiment of the present invention.

[0033] Numbers in the figure:

[0034] Mother finger ring (1), finger ring (2), guide joint (3), Luer joint (7), control sleeve (8), booster tube (13), wire rope (14), snare (6), needle tube (5), outer tube (4), electrode joint (9), electrode clamping column (12), snare hole (10), injection hole (11), connecting inner tube (15), limiting protrusion (16), limiting slot (17), U-shaped slot (18). DETAILED DESCRIPTION

[0035] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to specific diagrams.

[0036] This example aims to solve the problems existing in the existing polypectomy instruments and provides a safe and reliable polypectomy instrument. The polypectomy instrument has high operational reliability, is convenient and safe to use, and is easier to cover the diseased tissue and can avoid tissue slippage.

[0037] See attached Figure 1-6 , which shows the structure of the components of the polypectomy instrument provided in this example.

[0038] As can be seen from the figure, the polypectomy instrument comprises a thumb ring (1), a finger ring (2), a guide joint (3), a Luer joint (7), a control sleeve (8), a guide joint (3), a booster tube (13), a wire rope (14), a snare (6), a needle tube (5), an outer tube (4), an electrode joint (9), an electrode clamp column (12), and a connecting inner tube (15) and other components.

[0039] The mother finger ring (1), the finger ring (2), the guide joint (3), the booster tube (13), the wire rope (14), the snare (6), the outer tube (4), the electrode joint (9) and the electrode clamping column (12) cooperate to form a cutting function component in the polypectomy instrument.

[0040] The Luer connector (7), the control sleeve (8), the needle tube (5), the connecting inner tube (15) and the outer tube (4) cooperate to form an injection function component in the polypectomy instrument.

[0041] The two functional components are combined together via an outer tube (4) to form a polypectomy instrument.

[0042] For this purpose, see Figure 5 The outer tube (4) in this example has a double-channel structure, the two channels are not connected to each other, and include a trap hole (10) and an injection hole (11). The trap hole (10) and the injection hole (11) are symmetrically arranged side by side. The specific shapes of the two can be determined according to actual needs. As an example, an arcuate shape is adopted in the illustrated example.

[0043] On this basis, the cutting functional components in the polypectomy device are composed as follows:

[0044] The female finger ring (1), the finger ring (2), the guide joint (3), the booster tube (13), the electrode joint (9) and the electrode clamping column (12) constitute the head operating end of the cutting function component.

[0045] The outer tube (4), the steel wire rope (14) and the snare (6) cooperate to form a cutting operation end in the cutting function component.

[0046] See also Figure 1 and Figure 4 The female finger ring (1) is connected to the guide joint (3), and is connected to the outer tube (4) through the guide joint (3).

[0047] The finger ring (2) is mounted on the female finger ring (1) and can move axially relative to the female finger ring (1); the electrode connector (9) and the electrode clamping column (12) are inserted into the finger ring (2); the electrode connector (9) is connected to the electrode clamping column (12); and the electrode connector (9) and the finger ring (2) are connected together by threads or other connection methods.

[0048] See also Figure 4 The tail end of the booster tube (13) is connected to the electrode clamp column (12) in the finger ring (2), and contacts with the electrode connector (9) through clearance fit or other means, and can move relative to each other. The top end of the booster tube (13) is connected and communicated with the guide connector (3) to allow the steel wire rope (14) to pass through.

[0049] Furthermore, the snare (6) is inserted into the snare hole (10) of the outer tube (4) and connected to one end of the wire rope (14). The snare (6) can extend from the top of the snare hole (10) of the outer tube (4) or retract into the snare hole (10) according to the operation of the wire rope (14).

[0050] The tail end of the snare (6) is fixedly connected to one end of the steel wire rope (14), and the head end of the snare (6) has a guide head, which is integrally formed with the ferrule. In order to improve the operation effect, the structure of the guide head is preferably "V" shaped.

[0051] The wire rope (14) is passed through the snare hole (10) of the outer tube (4), one end of which is connected to the tail end of the snare (6), and the other end of which passes through the guide joint (3) and the booster tube (13) in sequence to be connected to the electrode joint 9.

[0052] In the cutting function component thus constructed, due to the clearance fit between the electrode connector (9) and the booster tube (13), when the finger ring (2) is operated, the electrode connector (9) and the steel wire rope (14) connected thereto can move relative to the booster tube (13), thereby driving the snare (6) connected to the steel wire rope (14) to move in the snare hole (10), thereby realizing the extension or retraction of the snare.

[0053] On this basis, in this embodiment, an anti-slip structure is provided outside the snare (6), and the anti-slip structure is preferably formed by arranging a plurality of insulating coils. In this way, the snare as a whole becomes rough by containing a plurality of insulating coils, so as to achieve an anti-slip effect during the operation of the snare.

[0054] It should be pointed out that the anti-skid structure here is not limited to this, and other anti-skid structure solutions can be adopted as needed.

[0055] See also Figure 1 and Figure 6 The injection function component of the polypectomy device is composed as follows:

[0056] The control sleeve (8) is connected to the outer tube (4), and is specifically connected to the injection hole 11 in the outer tube (4). The Luer connector (7) is inserted into the control sleeve (8) and can move forward and backward along the control sleeve (8) (e.g. Figure 7 , 8 The needle tube (5) is inserted into the injection hole 11 in the outer tube (4), and the needle tube (5) is fixedly connected to the tail end of the connecting inner tube (15), and the top end of the connecting inner tube (15) passes through the control sleeve (8) and is connected to the Luer connector (7).

[0057] In the injection function assembly thus constructed, the Luer connector (7) is pushed forward, and the Luer connector (7) moves forward in the control sleeve (8), thereby pushing the needle tube (5) to move in the outer tube (4) and push it out from the injection hole (11). At this time, a hardener or saline solution can be injected into the Luer structure (7) through a syringe. The lesion site is remotely injected through the needle tube (5), so that the flat lesion site is raised to facilitate the ferrule.

[0058] On this basis, in this example, a travel limit mechanism is provided between the Luer connector (7) and the control sleeve (8) to limit the travel of the Luer connector (7) within the control sleeve (8), thereby preventing the needle tube (5) from being excessively extended or retracted.

[0059] See also Figure 7-Figure 9 The travel limit mechanism is composed of a limit protrusion (16) arranged on the Luer connector (7) and a limit slot (17) correspondingly arranged on the control sleeve (8). The limit protrusion (16) is arranged on the insertion end of the Luer connector (7) inserted into the control sleeve (8), and the limit slot (17) is arranged at positions A and B on the control sleeve (8) corresponding to the movement stroke of the Luer connector (7), wherein position A corresponds to the maximum travel position of the Luer connector (7) moving backward in the control sleeve (8), and position B corresponds to the maximum travel position of the Luer connector (7) moving forward in the control sleeve (8). Therefore, by cooperating between the limit slots (17) at positions A and B on the control sleeve (8) and the limit protrusion (16) on the Luer connector (7), the travel of the Luer connector (7) in the control sleeve (8) is limited between positions A and B, thereby effectively preventing the needle tube (5) from being excessively extended or retracted.

[0060] Furthermore, in order to facilitate the control of the matching relationship between the limiting protrusion (16) and the limiting groove (17), in this example, a plurality of U-shaped grooves (18) are provided along the length direction of the insertion end of the Luer connector (7), so that the insertion end of the Luer connector (7) forms a ratchet structure with a limiting protrusion (such as Figure 6 Such a structure facilitates deformation operation and conveniently controls the matching relationship between the limiting protrusion (16) and the limiting slot (17).

[0061] The polypectomy instrument constructed according to the above scheme has an injection function component added on the basis of the cutting function component, so that the polyp injection and protrusion process can be performed before the snare of the cutting function component snares the tissue, and can quickly and accurately snare the tissue, thereby effectively improving the reliability of the operation of the polypectomy instrument and improving work efficiency and safety.

[0062] On this basis, this example further adds an anti-slip structure outside the snare. The anti-slip structure is composed of multiple insulating coils arranged to make the snare rough as a whole, thereby achieving an anti-slip effect and making it easier to trap tissue for cutting.

[0063] The following is a specific application example to further illustrate this solution (see Figure 1-6 ).

[0064] In actual use, the polypectomy instrument mainly comprises components such as a thumb ring (1), a finger ring (2), a guide joint (3), an outer tube (4), a needle tube (5), a snare (6), a Luer joint (7), a control sleeve (8), an electrode joint (9), a snare hole (10), an injection hole (11), an electrode clamp column (12), a booster tube (13), a steel wire cable (14), and a connecting inner tube (15). Among them, the outer tube (4) is provided with a snare hole (10) and an injection hole (11).

[0065] On this basis, the polypectomy device is assembled in the following manner:

[0066] 1. In the snare hole (10) in the outer tube (4), the snare (6) is connected to the distal end of the wire cable (14), and at the same time, the booster tube (13) is connected to the proximal end of the wire cable (14).

[0067] 2. The electrode connector (9) is connected to the electrode post (12) and inserted into the finger ring (2), and the booster tube (13) is connected to the electrode post (12) in the finger ring (2).

[0068] 3. Put the finger ring (2) on the female finger ring (1), and connect the outer tube (4) with the snare hole (10) and the injection hole (11) to the guide joint (3), and connect the guide joint (3) to the female finger ring (1), thereby forming a cutting function component.

[0069] 4. Connect the needle tube (5) to the distal end of the connecting inner tube (15), and connect the proximal end of the connecting inner tube (15) to the Luer connector (7).

[0070] 5. Connect the outer tube (4) with the snare hole (10) and the injection hole (11) to the control sleeve (8), connect the Luer connector (7) connected to the inner tube (15) and the needle tube (5) to the control sleeve (8), and allow the needle tube (5) to enter the injection hole (11) of the outer tube (4), thereby forming an injection function component.

[0071] 6. The cutting function component and the injection function component formed by the above steps (3) and (5) together constitute an accurate, fast and safe polypectomy instrument.

[0072] The operation process of the accurate, fast and safe polypectomy device for polypectomy is as follows (see Fig.10 and Fig.11 )

[0073] like Fig.10 As shown, first, use the index and middle fingers to pull back Figure 1 The middle finger ring (2) is used to retract the snare (6) into the snare hole (10) in the outer tube (4). Then, the injection function component is used to extend the needle tube (5) out of the injection hole (11) to inject the lesion location 20 (such as Fig.10 A), so that the flat lesion position 20 is raised to facilitate the loop (such as Fig.10 B), then retract the needle tube (5) into the injection hole (11);

[0074] like Fig.11 As shown, the component with cutting function is then used to extend the snare (6) out of the snare hole (10) (as shown in FIG. Fig.11 A), 20 loops (such as Fig.11 B), the snare is provided with an anti-slip structure outside (the anti-slip structure is composed of multiple insulating coils arranged to make the snare as a whole rough, achieving the effect of anti-slipping, making it easier to trap the tissue for cutting) to trap the polyp and cut the lesion tissue.

[0075] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A polypectomy instrument, comprising an outer tube and a cutting functional component, characterized in that: The polypectomy instrument further comprises an injection function component, wherein the outer tube has a snare hole and an injection hole which are not communicated with each other. The cutting function component is composed of a female finger ring, a finger ring, a guide joint, a booster tube, a wire rope, a snare, an outer tube, an electrode joint and an electrode clamp column; the female finger ring, the finger ring, the guide joint, the booster tube, the electrode joint and the electrode clamp column cooperate to form the head operation end of the cutting function component; the outer tube, the wire rope and the snare cooperate to form the cutting operation end of the cutting function component; The female finger ring is connected to the guide joint and connected to the outer tube through the guide joint. The finger ring is sleeved on the female finger ring and can move axially relative to the female finger ring. The electrode joint and the electrode clamp are inserted into the finger ring. The electrode joint is connected to the electrode clamp, and the electrode joint and the finger ring are connected together. The tail end of the booster tube is connected to the electrode clamp column in the finger ring and contacts the electrode joint through clearance fit and can move relatively. The top end of the booster tube is connected and communicated with the guide joint to allow the steel wire cable to pass through. The snare is inserted into the snare hole of the outer tube and connected to one end of the wire rope. The snare can extend from the top of the snare hole of the outer tube or retract into the snare hole according to the operation of the wire rope. The steel wire rope is inserted into the snare hole of the outer tube, one end of which is connected to the tail end of the snare, and the other end of which passes through the guide joint and the booster tube in sequence and is connected to the electrode joint; In the cutting function component, based on the clearance fit between the electrode connector and the booster tube, when the finger ring is operated, the electrode connector and the steel wire cable connected thereto can move relative to the booster tube, thereby driving the snare connected to the steel wire cable to move in the snare hole, thereby realizing the extension or retraction of the snare; The injection function component includes a Luer connector, a control sleeve, a connecting inner tube and a needle tube. The control sleeve is connected to the injection hole in the outer tube. The Luer connector is inserted in the control sleeve and can move along the control sleeve. The needle tube is inserted into the injection hole in the outer tube, and the needle tube is fixedly connected to the tail end of the connecting inner tube. The top end of the connecting inner tube passes through the control sleeve and is connected to the Luer connector. The Luer connector moves in the control sleeve, can push the needle tube to move in the outer tube, and is pushed out from the injection hole, so as to perform remote injection directly through the Luer connector and the needle tube.

2. The polypectomy instrument according to claim 1, characterized in that: The injection function component and the cutting function component are arranged in parallel.

3. The polypectomy instrument according to claim 1, characterized in that: The snare is provided with an anti-slip structure.

4. The polypectomy instrument according to claim 3, characterized in that: The anti-slip structure is formed by arranging a plurality of insulating coils.

5. The polypectomy instrument according to claim 1, characterized in that: A guide head is arranged on the snare, and the guide head is in a "V" shape.

6. The polypectomy instrument according to claim 1, characterized in that: A travel limiting mechanism is provided between the Luer connector and the control sleeve.

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