A puncture device limiting device and a laparoscopic puncture device

Abstract

The utility model provides a kind of puncture device limiting device, including elastic limiting ring and the extension limiting piece being connected with elastic limiting ring, the central hole aperture of elastic limiting ring is less than the outer diameter of trocar of laparoscope puncture device, and elastic limiting ring is tightly matched with the outer peripheral wall of the trocar of laparoscope puncture device by its central hole, and the end surface of elastic limiting ring and extension limiting piece is used to be limited with patient body surface, and the axial position of elastic limiting ring is adjusted to be set on the trocar of puncture device to adjust the trocar puncture depth of laparoscope puncture device, the depth of trocar trocar set into patient body surface can be conveniently adjusted, and the technical problem that the existing puncture device for laparoscopic surgery is difficult to control the puncture depth and causes inconvenience is effectively solved.The utility model provides a kind of laparoscope puncture device.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a puncture device limiting device and a laparoscopic puncture device. Background Technology

[0002] A trocar is a surgical instrument used to puncture the abdominal wall and provide a passage for other surgical instruments into the body cavity; it is a type of minimally invasive surgical instrument. A trocar typically consists of a cannula assembly that serves as the entry point for other surgical instruments and a puncture cone assembly that passes through the cannula assembly. First, to penetrate the skin, the epidermis is cut open with a scalpel. Then, the puncture cone assembly penetrates the skin and enters the body cavity along with the cannula assembly. The puncture cone assembly is then withdrawn. Inert gas is then injected into the cannula assembly via an insufflation machine connected to a gas insufflation valve, effectively separating the abdominal wall from the internal organs, thus providing a surgical passage for minimally invasive instruments to enter and exit the abdominal cavity.

[0003] When using the existing laparoscopic trocar, align the trocar assembly with and insert it into the center hole of the trocar until the locking buckle on the trocar is fully engaged in the locking buckle connection hole of the trocar, producing a "click" sound, indicating a secure connection between the trocar assembly and the trocar assembly. Then, pass your fingers through the trocar and grasp the handle, placing the trocar tip in your palm. Align the trocar tip with the pre-cut skin incision and gently press down on the trocar until the trocar is fully inserted into the abdominal cavity. Then, press the locking buckle and pull the trocar assembly upwards. Other laparoscopic surgical instruments, such as the endoscope, stapler, forceps, and scissors, can be inserted into the abdominal cavity through the trocar assembly for surgical procedures. After the surgery, remove the trocar assembly and suture the surgical incision.

[0004] Although laparoscopic surgery with a trocar offers great convenience, there are still some shortcomings in its use. The main issue is that when using a trocar for abdominal paracentesis, the puncture depth is difficult to control. If a shallow puncture depth is used, the trocar cannula is prone to tipping over or falling off. On the other hand, if the puncture depth is increased, it is easy to accidentally injure the patient's internal tissues.

[0005] In summary, existing trocars used in laparoscopic surgery suffer from technical problems, such as difficulty in controlling the puncture depth, which leads to inconvenience in their use. Utility Model Content

[0006] The technical problem to be solved by this utility model is that the existing trocars used in laparoscopic surgery have the problem of difficulty in controlling the puncture depth, which makes them inconvenient to use.

[0007] To address the aforementioned problems, this utility model provides a trocar limiting device for laparoscopic trocars, comprising an elastic limiting ring and an extended limiting member connected to the elastic limiting ring. The central hole diameter of the elastic limiting ring is smaller than the outer diameter of the laparoscopic trocar cannula. The elastic limiting ring is tightly fitted to the outer peripheral wall of the laparoscopic trocar cannula through its central hole. The end faces of the elastic limiting ring and the extended limiting member are used to abut against the patient's body surface for limiting. The trocar puncture depth of the laparoscopic trocar can be adjusted by adjusting the axial position of the elastic limiting ring on the trocar cannula.

[0008] Currently, the mainstream laparoscopic trocars on the market consist of two main components: a trocar cone assembly and a trocar cannula assembly. The trocar limiting device provided by this utility model includes an elastic limiting ring, which fits onto the outer peripheral wall of the trocar cannula through an elastic ring structure, forming a relatively firm tight fit between the two. The elastic limiting ring is also connected to an extension limiting member, which increases the contour of the structure connected to the elastic limiting ring so as to form a stable support and limiting with the patient's body surface. Furthermore, the limiting position can be changed by adjusting the axial position of the elastic limiting ring on the trocar cannula, thereby conveniently adjusting the depth of the trocar cannula inserted into the patient's body surface. This effectively solves the technical problem of the inconvenience caused by the difficulty in controlling the puncture depth in existing trocars used for laparoscopic surgery.

[0009] As a preferred embodiment, the device also includes an elastic limiting plunger with a central insertion hole. The elastic limiting plunger is used to form a tight fit with the cannula of the laparoscopic trocar. The diameter of the insertion hole is smaller than the outer diameter of the surgical instrument's insertion portion within the cannula. The elastic limiting plunger is tightly fitted with the outer peripheral wall of the surgical instrument's insertion portion through the insertion hole to radially position the surgical instrument.

[0010] This design further optimizes the performance of the trocar's limiting device. It primarily addresses situations where, after the trocar has completed its puncture and the trocar is removed, surgical instruments are inserted for laparoscopic or other surgeries. If the difference between the outer diameter of the inserted surgical instrument and the inner diameter of the trocar cannula is too large, it can cause instability in the surgical instrument's position, severely affecting the surgical procedure. By inserting an elastic limiting plunger into the orifice of the trocar cannula base, excess space within the cannula's central hole can be filled, effectively preventing relative movement between the surgical instrument and the trocar cannula.

[0011] As a preferred embodiment, a sealing membrane is fitted onto one end face of the elastic limiting plunger. The sealing membrane has an opening at the corresponding position of the insertion hole for the insertion of surgical instruments, thus sealing the space between the surgical instrument and the cannula seat. This design primarily optimizes the sealing and hygiene of the instruments. Since the outer peripheral wall of the inserted portion of the surgical instrument may have an irregular shape, a sealing membrane is specifically provided on one end face of the elastic limiting plunger to improve the sealing effect and also reduce the size range requirements of the insertion hole, ensuring a good seal after the instrument passes through the insertion hole of the elastic limiting plunger.

[0012] As a preferred embodiment, the elastic limiting plunger includes an integrally connected plunger portion and a limiting portion. The plunger portion is cylindrical and used to insert into the cannula of the laparoscopic trocar. The limiting portion is a circular plate with an outer contour dimension larger than that of the plunger portion, and its end face abuts against the end face of the cannula base for limiting movement. This design optimizes the elastic limiting plunger structure. The main body of the structure includes two cylindrical parts with different radial dimensions. The plunger portion is used to insert into the cannula, and the end face of the limiting portion with a larger outer diameter abuts against the end face of the cannula base around the cannula, forming an effective axial limit and preventing axial movement of the elastic limiting plunger.

[0013] As a preferred embodiment, the extended limiting member is a long strip structure with bendability, and both ends of the extended limiting member are fixedly connected to the limiting parts of the elastic limiting ring and the elastic limiting plunger, respectively.

[0014] This design optimizes the structure of the extended limiting component, enabling it to not only provide stability and positioning of the elastic limiting ring on the patient's body surface, but also to structurally connect the elastic limiting ring and the elastic limiting plunger into a single unit. This is mainly because the elastic limiting ring and the elastic limiting plunger are used in specific surgical phases or selectively, and therefore are not always connected to the laparoscopic trocar structure. For ease of handling and to prevent loss, a flexible, elongated structure is used to connect them into a single unit, and the use of the elastic limiting ring and the elastic limiting plunger can be carried out without interference between them.

[0015] As a preferred embodiment, the limiting part is integrally connected to a traction structure on the side opposite to the connection position of the extended limiting member. The end of the traction structure has a protrusion for assisting hand gripping. This design further optimizes the elastic limiting plunger structure. Since the plunger is designed for insertion and removal during use, and the plunger and sleeve hole are tightly fitted, a traction structure is provided on the side opposite to the connection position of the limiting part and the extended limiting member to ensure smooth insertion and removal. When pulling out the plunger, the traction structure and the extended limiting member at both ends can be held separately, facilitating hand gripping and force application.

[0016] As a preferred embodiment, the extended limiting member is provided with multiple pinhole structures, which are used to fix the puncture device limiting device to the patient's body surface through an auxiliary connecting structure. This design further optimizes the structure of the extended limiting member by providing multiple pinhole structures, enabling the extended limiting member to be fixed to the patient's body surface through common surgical procedures such as suturing, thus making the positioning of the puncture device more stable.

[0017] This utility model also provides a laparoscopic trocar, including a trocar cannula assembly and a trocar cone assembly that are slidably sleeved together. The trocar cannula assembly includes a cannula and a cannula seat connected to one end of the cannula. The trocar cone assembly includes a trocar rod and a trocar rod seat connected to one end of the trocar rod. The trocar rod is slidably sleeved with the cannula. It also includes a trocar limiting device as described in any of the above claims.

[0018] This utility model provides a laparoscopic trocar including the above-mentioned trocar limiting device. Since the above-mentioned trocar limiting device has the above-mentioned beneficial effects, the laparoscopic trocar with the trocar limiting device should also have the corresponding beneficial effects.

[0019] As a preferred embodiment, the outer peripheral wall of the cannula is provided with a serrated structure for axial positioning and fixation with the elastic limiting ring. This design optimizes the shape of the outer peripheral wall of the puncture cannula assembly, using a serrated outer peripheral wall shape that, when tightly fitted with the elastic limiting ring, achieves good positioning and prevents axial movement between the elastic limiting ring and the cannula.

[0020] As a preferred embodiment, the cannula seat of the puncture cannula assembly has a rounded chamfered edge on the cannula opening. This design optimizes the shape of the cannula opening of the puncture cannula base of the puncture cannula assembly, and by setting the rounded chamfer, it makes it easier to insert the plunger when using the elastic limiting plunger. Attached Figure Description

[0021] Figure 1 A schematic diagram of the structure of a puncture device limiting device provided by this utility model;

[0022] Figure 2 for Figure 1 A schematic diagram of the structure on the other side of the limiting device for the central puncture instrument;

[0023] Figure 3 A schematic diagram illustrating one usage state of a laparoscopic trocar provided by this utility model;

[0024] Figure 4 for Figure 3 A schematic diagram of another usage state of the laparoscopic trocar.

[0025] in, Figures 1-4 middle:

[0026] 1-1. Elastic limiting ring; 1-2. Extended limiting component; 1-3. Elastic limiting plunger; 1-3-1. Plunger part; 1-3-2. Limiting part; 1-4. Insertion hole; 1-5. Pulling structure; 2. Puncture cone assembly; 2-1. Puncture rod; 2-2. Puncture rod seat; 3. Puncture cannula assembly; 3-1. Cannula seat; 3-2. Cannula; 3-3. Rounded chamfer structure; 3-4. Serrated structure; 3-5. Tube hole. Detailed Implementation

[0027] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0028] Before providing a detailed explanation of the working principle of this utility model, further clarification is needed regarding its description: In this description, terms such as "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, an indirect connection through an intermediate medium, or a welded connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] refer to Figures 1-4 The following examples illustrate this. Figure 1 A schematic diagram of the structure of a puncture device limiting device provided by this utility model; Figure 2 for Figure 1 A schematic diagram of the structure on the other side of the limiting device for the central puncture instrument; Figure 3 A schematic diagram illustrating one usage state of a laparoscopic trocar provided by this utility model; Figure 4 for Figure 3 A schematic diagram of another usage state of the laparoscopic trocar.

[0031] An embodiment of this utility model provides a trocar limiting device for a laparoscopic trocar, including an elastic limiting ring 1-1 and an extended limiting member 1-2 connected to the elastic limiting ring 1-1. The diameter of the central hole of the elastic limiting ring 1-1 is smaller than the outer diameter of the cannula 3-2 of the laparoscopic trocar. The elastic limiting ring 1-1 is tightly fitted with the outer peripheral wall of the cannula 3-2 of the laparoscopic trocar through its central hole. The end faces of the elastic limiting ring 1-1 and the extended limiting member 1-2 are used to abut against the patient's body surface for limiting. The puncture depth of the cannula 3-2 of the laparoscopic trocar can be adjusted by adjusting the axial position of the elastic limiting ring 1-1 on the trocar cannula 3-2.

[0032] Currently, the mainstream laparoscopic trocars on the market consist of two main components: a trocar cone assembly and a trocar cannula assembly. The trocar limiting device provided by this utility model includes an elastic limiting ring, which fits onto the outer peripheral wall of the trocar cannula through an elastic ring structure, forming a relatively firm tight fit between the two. The elastic limiting ring is also connected to an extension limiting member, which increases the contour of the structure connected to the elastic limiting ring so as to form a stable support and limiting with the patient's body surface. Furthermore, the limiting position can be changed by adjusting the axial position of the elastic limiting ring on the trocar cannula, thereby conveniently adjusting the depth of the trocar cannula inserted into the patient's body surface. This effectively solves the technical problem of the inconvenience caused by the difficulty in controlling the puncture depth in existing trocars used for laparoscopic surgery.

[0033] In the technical solution provided in this embodiment, the trocar limiting device also includes an elastic limiting plunger 1-3. The elastic limiting plunger 1-3 has an insertion hole 1-4 at its center. The elastic limiting plunger 1-3 is used to form a tight fit with the cannula 3-5 of the trocar seat 3-1 of the laparoscopic trocar. The diameter of the insertion hole 1-4 is smaller than the outer diameter of the surgical instrument's surgical portion that extends into the cannula 3-2. The elastic limiting plunger 1-3 is tightly fitted with the outer peripheral wall of the surgical instrument's surgical portion through the insertion hole 1-4 to radially position the surgical instrument.

[0034] This design further optimizes the performance of the trocar's limiting device. It primarily addresses situations where, after the trocar has completed its puncture and the trocar is removed, surgical instruments are inserted for laparoscopic or other surgeries. If the difference between the outer diameter of the inserted surgical instrument and the inner diameter of the trocar cannula is too large, it can cause instability in the surgical instrument's position, severely affecting the surgical procedure. By inserting an elastic limiting plunger into the orifice of the trocar cannula base, excess space within the cannula's central hole can be filled, effectively preventing relative movement between the surgical instrument and the trocar cannula.

[0035] In the technical solution provided in this embodiment, a sealing membrane is fitted onto one end face of the elastic limiting plunger 1-3. The sealing membrane has an opening at the corresponding insertion hole 1-4 for the insertion of surgical instruments, which is used to seal the surgical instruments and the cannula seat 3-1. This design mainly optimizes the sealing and hygiene of the instruments. Since the outer peripheral wall of the inserted part of the surgical instrument may have an irregular shape, a sealing membrane is specially provided on one end face of the elastic limiting plunger to improve the sealing effect and reduce the size range requirements of the insertion hole in order to ensure that a good seal is formed after it passes through the insertion hole of the elastic limiting plunger.

[0036] In the technical solution provided in this embodiment, the elastic limiting plunger 1-3 includes an integrally connected plunger part 1-3-1 and a limiting part 1-3-2. The plunger part 1-3-1 is cylindrical and is used to insert into the tube hole 3-5 of the laparoscopic trocar cannula seat 3-1. The limiting part 1-3-2 is a circular plate with an outer contour dimension larger than that of the plunger part 1-3-1. The end face of the limiting part 1-3-2 is used to abut against the end face of the cannula seat 3-1 for limiting. This design optimizes the elastic limiting plunger structure. The main body of the structure includes two cylindrical parts with different radial dimensions. The plunger part is used to insert into the tube hole, and the end face of the limiting part with a larger outer diameter is used to abut against the end face of the cannula base around the tube hole, forming an effective axial limit and preventing the elastic limiting plunger from axially moving.

[0037] In the technical solution provided in this embodiment, the extended limiting member 1-2 is a long strip structure with bendability, and the two ends of the extended limiting member 1-2 are fixedly connected to the limiting part 1-3-2 of the elastic limiting ring 1-1 and the elastic limiting plunger 1-3, respectively.

[0038] This design optimizes the structure of the extended limiting component, enabling it to not only provide stability and positioning of the elastic limiting ring on the patient's body surface, but also to structurally connect the elastic limiting ring and the elastic limiting plunger into a single unit. This is mainly because the elastic limiting ring and the elastic limiting plunger are used in specific surgical phases or selectively, and therefore are not always connected to the laparoscopic trocar structure. For ease of handling and to prevent loss, a flexible, elongated structure is used to connect them into a single unit, and the use of the elastic limiting ring and the elastic limiting plunger can be carried out without interference between them.

[0039] In the technical solution provided in this embodiment, a pulling structure 1-5 is integrally connected to the limiting part 1-3-2 on the other side opposite to the connection position of the extended limiting member 1-2. The end of the pulling structure 1-5 is provided with a protrusion for assisting hand gripping. This design further optimizes the elastic limiting plunger structure. Since the plunger is designed for insertion and removal during use, and the plunger and sleeve hole are tightly fitted, a pulling structure is provided on the other side opposite to the connection position of the limiting part and the extended limiting member to ensure smooth insertion and removal. When performing the plunger removal action, the pulling structure and the extended limiting member at both ends can be held separately, which is convenient for hand gripping and force application.

[0040] In the technical solution provided in this embodiment, the extended limiting member 1-2 is provided with multiple pinhole structures. These pinhole structures are used to fix the puncture device limiting device to the patient's body surface through an auxiliary connecting structure. This design further optimizes the structure of the extended limiting member by providing multiple pinhole structures, enabling the extended limiting member to be fixed to the patient's body surface through common surgical procedures such as suturing, thus making the positioning of the puncture device more stable.

[0041] This utility model embodiment also provides a laparoscopic trocar, including a trocar cannula assembly 3 and a trocar cone assembly 2 that are slidably sleeved together. The trocar cannula assembly 3 includes a cannula 3-2 and a cannula seat 3-1 connected to one end of the cannula 3-2. The trocar cone assembly includes a trocar rod 2-1 and a trocar rod seat 2-2 connected to one end of the trocar rod 2-1. The trocar rod 2-1 is slidably sleeved with the cannula 3-2. It also includes a trocar limiting device as described in any of the above embodiments.

[0042] This utility model provides a laparoscopic trocar including the above-mentioned trocar limiting device. Since the above-mentioned trocar limiting device has the above-mentioned beneficial effects, the laparoscopic trocar with the trocar limiting device should also have the corresponding beneficial effects.

[0043] In the technical solution provided in this embodiment, the outer peripheral wall of the cannula 3-2 is provided with a serrated structure 3-4, which is used to form an axial limiting and fixing with the elastic limiting ring 1-1. This design optimizes the shape of the outer peripheral wall of the puncture cannula assembly. The serrated outer peripheral wall shape, when tightly fitted with the elastic limiting ring, can achieve a good positioning effect and avoid axial movement between the elastic limiting ring and the cannula.

[0044] In the technical solution provided in this embodiment, the cannula seat 3-1 of the puncture cannula assembly 3 has a rounded chamfer structure 3-3 at the edge of the cannula hole 3-5. This design optimizes the shape of the cannula hole edge of the puncture cannula base of the puncture cannula assembly. By setting the rounded chamfer, the plunger is easier to insert when using the elastic limiting plunger.

[0045] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the protection scope of this invention.

Claims

1. A puncture instrument limiting device, characterized in that, The device is used for laparoscopic puncture, including an elastic limiting ring (1-1) and an extended limiting member (1-2) connected to the elastic limiting ring (1-1). The diameter of the central hole of the elastic limiting ring (1-1) is smaller than the outer diameter of the cannula (3-2) of the laparoscopic puncture device. The elastic limiting ring (1-1) is tightly fitted with the outer peripheral wall of the cannula (3-2) of the laparoscopic puncture device through its central hole. The end faces of the elastic limiting ring (1-1) and the extended limiting member (1-2) are used to abut against the patient's body surface for limiting. The puncture depth of the cannula (3-2) of the laparoscopic puncture device is adjusted by adjusting the axial position of the elastic limiting ring (1-1) on the puncture device cannula (3-2).

2. The puncture device limiting device according to claim 1, characterized in that, It also includes an elastic limiting plunger (1-3), which has an insertion hole (1-4) at its center. The elastic limiting plunger (1-3) is used to be inserted into the cannula seat (3-1) of the laparoscopic trocar to form a tight fit. The diameter of the insertion hole (1-4) is smaller than the outer diameter of the surgical instrument inserted into the cannula (3-2). The elastic limiting plunger (1-3) is tightly fitted with the outer peripheral wall of the surgical instrument through the insertion hole (1-4) to radially position the surgical instrument.

3. The puncture device limiting device according to claim 2, characterized in that, A sealing membrane is fitted to one end face of the elastic limiting plunger (1-3). The sealing membrane has an opening at the position corresponding to the insertion hole (1-4) for inserting surgical instruments, which is used to seal the surgical instruments and the cannula seat (3-1).

4. The puncture device limiting device according to claim 2, characterized in that, The elastic limiting plunger (1-3) includes an integrally connected plunger part (1-3-1) and a limiting part (1-3-2). The plunger part (1-3-1) is cylindrical and is used to insert into the tube hole (3-5) of the laparoscopic trocar cannula seat (3-1). The limiting part (1-3-2) is a circular plate with an outer contour dimension larger than that of the plunger part (1-3-1). The end face of the limiting part (1-3-2) is used to abut against the end face of the cannula seat (3-1) for limiting.

5. The puncture device limiting device according to claim 4, characterized in that, The extended limiting member (1-2) is a long strip structure with flexible bending. The two ends of the extended limiting member (1-2) are fixedly connected to the limiting part (1-3-2) of the elastic limiting ring (1-1) and the elastic limiting plunger (1-3), respectively.

6. The puncture device limiting device according to claim 4, characterized in that, The limiting part (1-3-2) has a traction structure (1-5) integrally connected to the other side opposite to the connection position of the extended limiting member (1-2). The end of the traction structure (1-5) is provided with a protrusion for assisting hand holding.

7. The puncture device limiting device according to claim 5, characterized in that, The extended limiting member (1-2) is provided with multiple pinhole structures, which are used to fix the puncture device limiting device to the patient's body surface through an auxiliary connecting structure.

8. A laparoscopic trocar, comprising a trocar cannula assembly (3) and a trocar cone assembly (2) that are slidably sleeved together, wherein the trocar cannula assembly (3) includes a cannula (3-2) and a cannula seat (3-1) connected to one end of the cannula (3-2), and the trocar cone assembly includes a trocar rod (2-1) and a trocar rod seat (2-2) connected to one end of the trocar rod (2-1), wherein the trocar rod (2-1) is slidably sleeved with the cannula (3-2), characterized in that, It also includes the puncture device limiting device as described in any one of claims 1-7.

9. The laparoscopic trocar according to claim 8, characterized in that, The outer peripheral wall of the sleeve (3-2) is provided with a serrated structure (3-4) for axial limiting and fixing with the elastic limiting ring (1-1).

10. The laparoscopic trocar according to claim 8, characterized in that, The cannula seat (3-1) of the puncture cannula assembly (3) has a rounded chamfered structure (3-3) at the edge of the cannula hole (3-5).

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