Superfine auxiliary instrument for laparoscopic cholecystectomy

Abstract

The invention discloses a laparoscopic cholecystectomy superfine auxiliary instrument and relates to the technical field of medical instruments, the laparoscopic cholecystectomy superfine auxiliary instrument comprises a handle, a superfine puncture part and a head, the superfine puncture part comprises an outer sleeve and a puncture needle, the two ends of the outer sleeve are connected with the handle and the head respectively, the puncture needle is arranged in the outer sleeve, and the front end of the puncture needle is provided with a puncture tip; the handle controls the puncture needle to slide back and forth so as to control the opening and closing of the head part. According to the scheme, ultramicro-invasive puncture is achieved through the detachable head and the superfine puncture part, firstly, the superfine puncture part can conduct ultramicro-invasive opening on the abdomen of a patient through the puncture tip at the front end of the puncture needle, so that the superfine puncture part enters the abdominal cavity of the patient, and then the superfine puncture part penetrates out of the body of the patient under the guide of a converter of an umbilical laparoscope opening; the head assembly is accurately completed under in-vitro direct vision, then the head assembly is returned to the abdomen of a patient to complete an operation, and under the condition that the opening and closing distance and the clamping force of the head are proper, ultramicro-wound trepanning is completed, postoperative scars are eliminated, and the pain of the patient is relieved.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to an ultra-thin auxiliary device for laparoscopic cholecystectomy. Background Technology

[0002] Single-port laparoscopic surgery is difficult to perform and its widespread adoption is limited due to the "chopstick effect." Therefore, clinical surgery typically requires 3-5 access points. Surgeons use these access points to apply laparoscopic surgical instruments to the target tissues. For example, cholecystectomy usually requires the use of surgical instruments to expose and dissect the organs.

[0003] Studies have shown that skin lesions smaller than 2mm will not leave scars. Based on this theory, a dissecting forceps instrument capable of minimally invasive puncture has been developed, such as a 2mm needle-tip laparoscopic dissecting forceps with puncture function disclosed in patent CN210330676U. However, compared with conventional laparoscopic surgical instruments, it has fatal defects such as small forceps head, short opening and closing distance, and poor clamping force, making it difficult to promote clinically.

[0004] Therefore, there is an urgent need to develop a minimally invasive surgical instrument that functions the same as conventional laparoscopic surgical instruments but causes less trauma. Summary of the Invention

[0005] The present invention aims to provide an ultra-fine auxiliary instrument for laparoscopic cholecystectomy to solve the problems of small forceps, short opening and closing distance, and poor clamping force of minimally invasive puncture instruments.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A laparoscopic cholecystectomy ultrafine auxiliary instrument, comprising a handle, an ultrafine insertion part, and a head;

[0008] The ultra-fine insertion part includes an outer tube and a puncture needle. The two ends of the outer tube are respectively connected to a handle and a head, and the diameter is less than 1.9 mm. The puncture needle is placed in the outer tube, with a puncture tip at the front end and a handle at the rear end.

[0009] The handle is hinged with a movable grip part, and a first gear is provided at the hinge of the movable grip part. A second gear is installed on the handle. The first gear and the second gear are hinged together. One side of the second gear protrudes to form a groove structure. A spherical slider is provided at the rear end of the puncture needle. The spherical slider forms a sliding connection in the groove.

[0010] The head is equipped with a first half-clamp and a second half-clamp that are hinged to each other to form a clamping part. Push rods are hinged to the side of the rear end of the first half-clamp and the second half-clamp. A cavity structure is provided at the rear end of the clamping part. A piston that slides back and forth is installed in the cavity structure. A stop rod is provided at the front end of the piston. The push rods of the first half-clamp and the second half-clamp are hinged to the stop rod. A receiving cavity is provided inside the piston. The receiving cavity is connected to the puncture tip of the puncture needle by interference fit.

[0011] Furthermore, a locking device is installed on the handle; the locking device includes an arc-shaped serrated bar installed on the handle and a serrated hole provided in the movable grip part, the end of the serrated bar away from the handle passes through the serrated hole, and both the serrated bar and the serrated hole are provided with serrated structures, so that the serrated bar and the serrated hole interlock and lock each other.

[0012] Furthermore, the outer tube is detachably connected to the handle and the head via a threaded structure.

[0013] Furthermore, an angle adjustment knob is provided at the connection between the outer tube and the handle. One end of the angle adjustment knob is hinged to the handle, and the other end is detachably connected to the outer tube.

[0014] Furthermore, the side of the slide structure is provided with a connecting channel. When the second gear rotates and causes the slide structure to rotate backward to its limit angle, the connecting channel is collinear with the puncture needle, and the spherical slider at the rear end of the puncture needle can slide out along the connecting channel.

[0015] Furthermore, the handle is provided with a limiting boss, which is used to limit the slide structure from rotating backward to its limit angle.

[0016] Furthermore, the piston's internal accommodating cavity has a protective chamber at its front end to protect the tip.

[0017] Furthermore, during the surgery, after the ultra-fine puncture head enters the abdominal cavity, it exits through the laparoscopic channel and connects with the head outside the body, forming a single surgical instrument.

[0018] The principle and beneficial effects of this technical solution:

[0019] 1. This procedure achieves minimally invasive puncture through a detachable head and an ultra-fine insertion part. The specific operating principle is as follows: First, the ultra-fine insertion part can make a minimally invasive opening in the patient's abdomen through the puncture tip of the puncture needle, allowing the ultra-fine insertion part to enter the patient's abdominal cavity. Then, under the guidance of the converter of the laparoscopic opening at the umbilicus, it is exited from the patient's body. The head is precisely assembled under direct external vision, and then returned to the patient's abdomen to complete the surgery. While ensuring the opening and closing distance of the head and the appropriate clamping force, the minimally invasive opening is completed, eliminating postoperative scars and reducing the patient's pain.

[0020] 2. Simultaneously, because the tip of the puncture needle forms a puncture point, it is difficult to stably connect with the head, thus hindering stable control of the head's opening and closing. This solution innovatively adopts a new control opening and closing structure, the specific principle of which is as follows: During head assembly, the outer sleeve of the ultra-fine insertion part is fixedly connected to the head via threads. The internal puncture needle advances along the head until its tip enters the receiving chamber inside the piston, forming an interference fit. This creates a certain friction between the puncture tip and the inner wall of the receiving chamber. Furthermore, the handle at the rear end of this solution, through an innovative transmission structure, allows the puncture needle to slide forward, pressing against the piston as it slides forward. Simultaneously, the stop rod pushes the push rod, which abuts against the outer side of the rear end of the head clamping part, causing the clamping... The clamping part clamps inward, forming a tight transmission structure that ensures good clamping force even when the puncture tip is not stably connected to the head. During surgery, the surgeon only needs to squeeze the handle and the movable grip to achieve the clamping function. During separation, the surgeon releases the handle and the movable grip, the puncture needle retracts, and the puncture tip at the front end drives the piston to retract under the action of friction. As long as the friction between the puncture tip and the inner wall of the piston is greater than the total friction of the entire transmission chain, the clamping part can be separated. The overall operation is simple and effective, providing good clamping force to the head even when the puncture tip is difficult to stably connect with it. Attached Figure Description

[0021] Figure 1 A schematic diagram of the overall structure of an ultra-thin auxiliary instrument for laparoscopic cholecystectomy;

[0022] Figure 2 A cross-sectional view of an ultra-fine auxiliary instrument for laparoscopic cholecystectomy;

[0023] Figure 3 A schematic diagram of the head explosion of an ultra-fine auxiliary instrument for laparoscopic cholecystectomy.

[0024] Figure 4 A sectional view of the head of a laparoscopic cholecystectomy ultra-fine auxiliary instrument;

[0025] Figure 5 This is a schematic diagram of the second gear in a cross-sectional view of an ultra-fine auxiliary instrument for laparoscopic cholecystectomy.

[0026] The reference numerals in the accompanying drawings include:

[0027] 1. Handle; 2. Ultra-fine insertion part; 201. Outer tube; 202. Puncture needle; 2021. Puncture tip; 2022. Spherical slider; 3. Head; 4. Movable grip part; 5. First gear; 6. Second gear; 7. Slide structure; 8. Clamping part; 801. First half clamp; 802. Second half clamp; 9. Push rod; 10. Cavity structure; 11. Piston; 12. Plug rod; 13. Receiving cavity; 14. Protective chamber; 15. Locking device; 1501. Spike bar; 1502. Spike hole; 1503. Spike structure; 16. Threaded structure; 17. Angle adjustment knob; 18. Connecting channel; 19. Limiting boss. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the embodiments and accompanying drawings. Here, the illustrative embodiments and descriptions of this invention are used to explain the invention, but are not intended to limit the invention.

[0029] It should also be noted that, in order to avoid obscuring the invention with unnecessary details, only the structures and / or processing steps closely related to the solution according to the invention are shown in the accompanying drawings, while other details that are not closely related to the invention are omitted.

[0030] It should be emphasized that the term "including / comprises" as used herein refers to the presence of a feature, element, step, or component, but does not exclude the presence or addition of one or more other features, elements, steps, or components.

[0031] In the following description, embodiments of the invention will be illustrated with reference to the accompanying drawings. In the drawings, the same reference numerals represent the same or similar parts, or the same or similar steps.

[0032] It should be emphasized here that the step markers mentioned below are not a limitation on the order of the steps, but should be understood as meaning that the steps can be executed in the order mentioned in the embodiments, or in a different order than in the embodiments, or several steps can be executed simultaneously.

[0033] The specific implementation process is as follows:

[0034] refer to Figures 1 to 5 A laparoscopic cholecystectomy ultrafine auxiliary instrument, comprising a handle 1, an ultrafine insertion part 2, and a head 3;

[0035] The ultra-fine insertion part 2 includes an outer tube 201 and a puncture needle 202. The outer tube 201 is connected to a handle 1 and a head 3 at both ends. In this embodiment, the outer tube 201 is detachably connected to the handle 1 and the head 3 via a threaded structure 16. The diameter of the outer tube 201 is less than 1.9 mm. Generally, given sufficient material strength, its diameter should be as small as possible. The puncture needle 202 is placed inside the outer tube 201, with a puncture tip 2021 at its front end and connected to the handle 1 at its rear end. In this design, the puncture needle 202 and the outer tube 201 form a tight fit, ensuring the overall structural strength of the ultra-fine insertion part 2. Simultaneously, the thread height of the threaded structure 16 at the connection between the outer tube 201 and the head 3 should be less than 0.05 mm, so that the wound formed when the ultra-fine insertion part 2 punctures the abdomen is less than or equal to 2 mm, or an internal thread design can be used.

[0036] Meanwhile, this embodiment adopts a transmission structure that has the opposite effect to the prior art, so that the puncture needle 202 slides forward when the handle 1 is gripped, which cooperates with the new control structure of the head 3 to control the opening and closing of the clamping part 8 of the head 3. The specific structure is as follows:

[0037] In this embodiment, a movable grip portion 4 is hinged to the handle 1. A first gear 5 is provided at the hinge of the movable grip portion 4, and a second gear 6 is installed on the handle 1. The first gear 5 and the second gear 6 are hinged together. A groove structure 7 protrudes from one side of the second gear 6. A spherical slider 2022 is provided at the rear end of the puncture needle 202, and the spherical slider 2022 forms a sliding connection within the groove. When the handle 1 and the movable grip portion 4 are gripped, the first gear 5 rotates clockwise (in the direction shown in the figure), and the second gear 6 rotates counterclockwise, causing the groove structure 7 to rotate forward and pushing the puncture needle 202 to slide forward. Similarly, when the handle 1 and the movable grip portion 4 are released, the puncture needle 202 slides back in the opposite direction.

[0038] To ensure the separability of the puncture needle 202 from the slide groove and facilitate postoperative disassembly, cleaning, and disinfection, this embodiment provides a connecting channel 18 on the side of the slide groove structure 7. When the second gear 6 rotates and causes the slide groove structure 7 to rotate backward to its limit angle, the connecting channel 18 is collinear with the puncture needle 202, and the spherical slider 2022 at the rear end of the puncture needle 202 can slide out along the connecting channel 18.

[0039] Meanwhile, a limiting boss 19 is provided on the handle 1 to limit the slide structure 7 from rotating backward to the limit angle.

[0040] Because the tip of the puncture needle 202 forms a puncture point 2021, it is difficult to stably connect with the head 3, thus making it difficult to stably control the opening and closing of the head 3. This solution innovatively adopts a new control opening and closing structure, the specific structure of which is as follows:

[0041] In this embodiment, the head 3 is equipped with a first half-clamp 801 and a second half-clamp 802 that are hinged to each other to form a clamping part 8. Push rods 9 are hinged to the side of the rear end of the first half-clamp 801 and the second half-clamp 802. A cavity structure 10 is provided at the rear end of the clamping part 8. A piston 11 that slides back and forth is installed in the cavity structure 10. A stop rod 12 is provided at the front end of the piston 11. The push rods 9 of the first half-clamp 801 and the second half-clamp 802 are hinged to the stop rod 12. A receiving cavity 13 is provided inside the piston 11. The receiving cavity 13 and the puncture tip 2021 of the puncture needle 202 are connected by an interference fit.

[0042] During the assembly of the head 3, the outer sleeve 201 of the ultra-fine insertion part 2 is fixedly connected to the head 3 by threads. The puncture needle 202 inside advances along the head 3 until the front end of the puncture needle 202 enters the receiving chamber inside the piston 11 and forms an interference fit, so that there is a certain friction between the puncture tip and the inner wall of the receiving chamber.

[0043] Squeezing handle 1 and movable grip 4 causes the puncture needle 202 to slide forward, pressing against piston 11 and sliding forward. Simultaneously, stop rod 12 pushes push rod 9, which presses against the outer rear end of clamping part 8 of head 3, causing clamping part 8 to clamp inward. The entire system forms a tight transmission structure, ensuring that clamping part 8 can still maintain good clamping force even when the puncture tip 2021 is not stably connected to head 3. During surgery, the surgeon only needs to squeeze handle 1 and movable grip 4 to clamp part 8. The clamping function allows the surgeon to release the handle 1 and the movable grip 4 during the separation operation. The puncture needle 202 retracts, and the puncture tip 2021 at the front end drives the piston 11 to retract under the action of friction. As long as the friction between the puncture tip 2021 and the inner wall of the piston 11 is greater than the total friction of the entire transmission chain, the separation operation of the clamping part 8 can be achieved. The overall operation is simple and effective. It enables the head 3 to have good clamping force when the puncture tip 2021 is difficult to connect stably with the head 3.

[0044] Because the puncture tip 2021 needs to remain sharp to facilitate abdominal puncture, a protective chamber 14 is provided at the front end of the receiving cavity 13 inside the piston 11 to protect the tip. The diameter of the protective chamber 14 is slightly smaller than that of the receiving cavity 13. The receiving cavity 13 and the protective chamber 14 have a buffer slope with the same angle as the puncture tip 2021, so that the puncture tip 2021 will not be damaged when the puncture needle 202 transmits force forward.

[0045] Meanwhile, to facilitate surgical separation, a locking device 15 is installed on handle 1, so that the surgeon does not need to constantly grip handle 1 and movable grip 4, while still ensuring stable clamping of head 3. This structure is similar to commonly used solutions in existing technologies, and will not be described in detail here. The following describes a commonly used locking structure:

[0046] The locking device 15 of this embodiment includes an arc-shaped serrated bar 1501 mounted on the handle 1 and a serrated hole 1502 provided in the movable grip part 4. The end of the serrated bar 1501 away from the handle 1 passes through the serrated hole 1502. Both the serrated bar 1501 and the serrated hole 1502 are provided with serrated structures 1503, so that the serrated bar 1501 and the serrated hole 1502 can be interlocked and locked to realize the locking function. At the same time, gently prying the serrated bar 1501 can separate the serrated bar 1501 and the serrated hole 1502 from each other, so that the locking function is disabled.

[0047] To facilitate the surgeon's adjustment of the opening and closing angle of the clamping part 8 during the operation, in this embodiment, an angle adjustment knob 17 is provided at the connection between the outer tube 201 and the handle 1. One end of the angle adjustment knob 17 is hinged to the handle 1, and the other end is detachably connected to the outer tube 201. This is similar to the solution used in conventional technology, and will not be described in detail here.

[0048] This solution achieves minimally invasive puncture through a detachable head 3 and an ultra-fine insertion part 2. The specific operating principle is as follows: First, the ultra-fine insertion part 2 can make a minimally invasive opening in the patient's abdomen through the puncture tip 2021 at the front end of the puncture needle 202, allowing the ultra-fine insertion part 2 to enter the patient's abdominal cavity. Then, under the guidance of the converter of the laparoscopic opening at the umbilicus, it is exited from the patient's body. The head 3 is precisely assembled under direct external vision, and then it is returned to the patient's abdomen to complete the surgery. While ensuring that the opening and closing distance of the head 3 and the clamping force are appropriate, the minimally invasive opening is completed, eliminating postoperative scars and reducing the patient's pain. After the surgery, the device can be disassembled and removed by reversing the aforementioned operation.

[0049] It should be clarified that the present invention is not limited to the specific configurations and processes described above and shown in the figures. For the sake of brevity, detailed descriptions of known methods are omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present invention is not limited to the specific steps described and shown. Those skilled in the art can make various changes, modifications, and additions, or change the order of steps, after understanding the spirit of the present invention.

[0050] In this invention, features described and / or illustrated for one embodiment may be used in the same or similar manner in one or more other embodiments, and / or combined with or in place of features of other embodiments.

[0051] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, various modifications and variations of the embodiments of the present invention are possible. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An ultrathin laparoscopic cholecystectomy auxiliary instrument, characterized in that: The handle (1), the super-fine puncture part (2) and the head (3) are included. The super-fine puncture part (2) includes an outer sleeve (201) and a puncture needle (202), the outer sleeve (201) is connected with the handle (1) and the head (3) at both ends respectively, and the diameter is less than 1.9mm, the puncture needle (202) is arranged in the outer sleeve (201), the front end is provided with a puncture tip (2021), and the rear end is connected with the handle (1). The handle (1) is hinged with a movable holding part (4), the hinge part of the movable holding part (4) is provided with a first gear (5), the handle (1) is provided with a second gear (6), the first gear (5) and the second gear (6) constitute a hinged relationship, one side of the second gear (6) protrudes to form a sliding groove structure (7), the rear end of the puncture needle (202) is provided with a spherical sliding block (2022), and the spherical sliding block (2022) is connected in sliding mode in the sliding groove. The head (3) is provided with a first half clamp (801) and a second half clamp (802) hinged with each other to form a clamping part (8), the side surfaces of the rear ends of the first half clamp (801) and the second half clamp (802) are hinged with push rods (9), the rear end of the clamping part (8) is provided with a cavity structure (10), a piston (11) sliding forward and backward is arranged in the cavity structure (10), the piston (11) is provided with a plug rod (12) at the front end, the push rods (9) of the first half clamp (801) and the second half clamp (802) are hinged on the plug rod (12), and the piston (11) is provided with a containing cavity (13) in the inside.

2. The laparoscopic cholecystectomy ultra-fine auxiliary instrument according to claim 1, characterized in that: The handle (1) is provided with a locking device (15), the locking device (15) includes a circular arc-shaped barb strip (1501) arranged on the handle (1) and a barb hole (1502) arranged on the movable holding part (4), one end of the barb strip (1501) away from the handle (1) penetrates through the barb hole (1502), the barb strip (1501) and the barb hole (1502) are provided with barb structures (1503) respectively, so that the barb strip (1501) and the barb hole (1502) are locked with each other.

3. The laparoscopic cholecystectomy ultra-fine auxiliary instrument according to claim 1, characterized in that: The outer sleeve (201), the handle (1) and the head (3) are detachably connected through a threaded structure (16).

4. The laparoscopic cholecystectomy ultra-fine auxiliary instrument according to claim 3, characterized in that: The connecting part of the outer sleeve (201) and the handle (1) is provided with an angle adjusting knob (17), one end of the angle adjusting knob (17) is hinged on the handle (1), and the other end is detachably connected with the outer sleeve (201).

5. The laparoscopic cholecystectomy ultra-fine auxiliary instrument according to claim 1, characterized in that: A connecting channel (18) is formed in the side surface of the sliding groove structure (7), when the sliding groove structure (7) is rotated to the limit angle by the rotation of the second gear (6), the connecting channel (18) is collinear with the puncture needle (202), and the spherical sliding block (2022) at the rear end of the puncture needle (202) can slide out along the connecting channel (18).

6. The laparoscopic cholecystectomy ultra-fine auxiliary instrument according to claim 1, characterized in that: The handle (1) is provided with a limiting boss (19) for limiting the rotation of the sliding groove structure (7) to the limit angle.

7. The laparoscopic cholecystectomy ultra-fine auxiliary instrument according to claim 1, characterized in that: The front end of the accommodating cavity (13) in the piston (11) is provided with a protection chamber (14) for protecting the tip.

8. The laparoscopic cholecystectomy ultra-fine auxiliary instrument according to any one of claims 1-7, characterized in that: During the operation, the superfine puncture part (2) punctures into the abdominal cavity, passes through the laparoscope channel, and is connected with the head part (3) outside the body, and after the connection, the operation instrument is formed in one piece.

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