Puncture trocar for laparoscopic surgery

Abstract

The utility model relates to a puncture trocar for laparoscopic surgery. The laparoscopic surgery puncture trocar comprises a trocar body, an air bag and a clamping piece. The air bag sleeves one end of the tube body and is used for expanding in the diameter direction of the tube body after being inflated; the clamping piece is movably mounted on the pipe body; a clamping face is arranged on the side, close to the air bag, of the clamping piece, and the clamping face and the air bag are matched with each other and used for being clamped on the two opposite sides of an operation puncture opening, so that the tube body is fixed to the operation puncture opening. The expansion degree of the air bag is adjusted, the clamping piece on the outer side of the human body is matched to help the puncture trocar to be fixed, the distance between the clamping piece and the air bag can be adjusted at will, and the puncture trocar can still be suitable for people with different figures or patients with different abdominal wall thicknesses; and the fixing firmness of the puncture trocar is ensured.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a laparoscopic surgical puncture cannula. Background Technology

[0002] Trocars can be used in various surgical procedures, allowing specialists to puncture the abdominal cavity during laparoscopic surgery, deliver gas into the abdominal cavity, and establish access for endoscopes and surgical instruments. Current technology employs various fixation structures to secure the trocar at the surgical puncture site. For example, two balloons are positioned on the side wall of the trocar. One balloon, in its deflated state, extends into the patient's abdominal cavity, while the other remains outside the patient's body. Inflation then inflates the balloons, causing them to rise and press against the skin or peritoneum, thus securing the trocar. However, due to variations in patient size and abdominal wall thickness, these existing trocars are difficult to apply to all types of patients and struggle to ensure reliable fixation. Utility Model Content

[0003] Therefore, it is necessary to provide a laparoscopic surgical puncture cannula to address the problem of unreliable fixation of existing puncture cannulas.

[0004] A laparoscopic surgical trocar, comprising:

[0005] tube body;

[0006] An airbag, which is fitted onto one end of the tube, is used to inflate and expand along the diameter of the tube.

[0007] A clamping element is movably mounted on the tube body; the side of the clamping element near the airbag is configured as a clamping surface, and the clamping surface and the airbag cooperate with each other to clamp on opposite sides of the surgical puncture site, so that the tube body is fixed on the surgical puncture site.

[0008] As a preferred example, the clamping member includes an elastic member, which is used to fix the clamping member relative to the tube body by means of elastic force, and to move the connection member to the position on the tube body.

[0009] As a preferred example, the clamping member includes:

[0010] Two first sleeve rings are fitted onto the pipe fitting; the two first sleeve rings are slidably connected to each other;

[0011] A spring, positioned between the two first rings, is used to push the two first rings away from each other to clamp the tube.

[0012] As a preferred example, one of the first collars has a groove at the middle of its side in the thickness direction, and the groove is connected to the interior of the first collar; the other first collar is slidably connected to the groove.

[0013] As a preferred example, the clamping member includes:

[0014] The clamping plate has a notch on one side that matches the diameter of the tube; the side of the clamping plate closest to the airbag is the clamping surface.

[0015] A fixing clamp includes two hinged plates and a torsion spring; the hinge axis of the two plates is connected to the side of the clamping plate away from the clamping surface; the torsion spring is used to push the two plates to rotate to clamp the tube.

[0016] As a preferred example, the clamping member includes:

[0017] An insert is fitted onto the tube body; the insert has a beveled surface.

[0018] Two second rings are fitted onto the insert; the two second rings are threaded together; the inner wall of one of the second rings abuts against the inclined surface on the insert; when the two second rings move away from or closer to each other through the threads, the second rings press the inclined surface, causing the insert to deform towards the axis of the tube to clamp the tube.

[0019] As a preferred example, the clamping member includes:

[0020] Two semi-ring blocks are fitted onto the pipe fitting; one end of each semi-ring block is hinged to the other.

[0021] The buckle, located at the other end of the two semi-ring blocks, is used to lock the pipe fitting when the two semi-ring blocks close together.

[0022] As a preferred example, the buckle includes a strip-shaped portion and a hook-shaped portion connected to one end of the strip-shaped portion; the strip-shaped portion is hinged to the end of one of the semi-ring blocks; the end of the other semi-ring block is provided with a hook groove that matches the hook-shaped portion.

[0023] As a preferred example, the laparoscopic surgical puncture cannula further includes:

[0024] An airbag membrane is fitted onto the tube body; an inflation gap is provided between the airbag membrane and the tube body.

[0025] A restraint sleeve is fitted over an airbag membrane; a section of the airbag membrane is located outside the restraint sleeve; the section of the airbag membrane outside the restraint sleeve expands with gas to form the airbag.

[0026] The air nozzle, which is connected to the tube body, is used to inflate or deflate the air gap.

[0027] As a preferred example, the tube body is made of PC; the airbag is made of PE or TPU; and the clamping component is made of PC or PP.

[0028] As a preferred embodiment, the end face of the tube body is perpendicular to the axis of the tube body, and the end of the tube body is rounded.

[0029] The beneficial effects of this utility model are as follows: This utility model helps to fix the puncture cannula by adjusting the degree of inflation of the airbag and cooperating with the clamp on the outside of the human body. The clamp can be adjusted arbitrarily to adjust the distance between it and the airbag. It can still be applied to people of different weights or patients with different abdominal wall thicknesses, and ensures the reliability of the puncture cannula when it is fixed. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the puncture cannula in Example 1;

[0031] Figure 2 This is a cross-sectional schematic diagram of the clamping component in Embodiment 1;

[0032] Figure 3 This is a schematic diagram of the puncture cannula in Example 2;

[0033] Figure 4 This is a schematic diagram of the clamping component in Embodiment 2;

[0034] Figure 5 This is a schematic diagram of the puncture cannula in Example 3;

[0035] Figure 6 This is a cross-sectional schematic diagram of the clamping component in Embodiment 3;

[0036] Figure 7 This is a schematic diagram of the puncture cannula in Example 4;

[0037] Figure 8 This is a schematic diagram of the clamping component in Example 4;

[0038] Figure 9 This is a cross-sectional structural diagram of the tube and airbag in another embodiment.

[0039] In the diagram: 1. Tube body; 2. Airbag; 3. Clamping piece; 4. First collar; 5. Spring; 6. Clamping plate; 7. Fixing clamp; 8. Torsion spring; 9. Insert; 10. Second collar; 11. Half-ring block; 12. Buckle; 13. Constraint sleeve; 14. Air nozzle. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0041] It should be noted that when a component is said to be "installed on" another component, it can be directly on the other component or it may be in a component that is centered on it. When a component is said to be "set on" another component, it can be directly set on the other component or it may also be in a component that is centered on it. When a component is said to be "fixed to" another component, it can be directly fixed to the other component or it may also be in a component that is centered on it.

[0042] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element 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 application.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0044] This invention provides a laparoscopic surgical puncture cannula, comprising a cannula 1, a balloon 2, and a clamping element 3. The cannula 1 can be constructed using existing cannulas. Only one balloon 2 is provided, located at the end of the cannula 1, i.e., the end that can extend into the patient's abdominal cavity. The key feature is the movable clamping element 3. This clamping element 3 is fixed to the cannula 1, and its position on the cannula 1 can be easily adjusted as needed. The side of the clamping element 3 closest to the balloon 2 is designated as the clamping surface. By adjusting the position of the clamping element 3 on the cannula 1, the distance between the clamping surface and the balloon 2 can be controlled. This distance corresponds to the thickness of the patient's abdominal cavity. Ultimately, the clamping surface and the balloon 2 cooperate to clamp the cannula 1 on opposite sides of the surgical puncture site, ensuring the cannula 1 is firmly fixed to the surgical puncture site. To achieve this effect, the clamping element 3 may include an elastic element, utilizing its elasticity to fix the clamping element 3 to the cannula 1. When the clamping member 3 needs to be moved, the elastic element is operated to release the clamping member 3 from the tube body 1. The specific structure of the clamping member 3 includes the following embodiments:

[0045] Example 1

[0046] Please refer to Figure 1 and Figure 2 In this embodiment, the clamping member 3 includes two first sleeve rings 4 and springs 5. Both first sleeves are fitted onto the tube and are slidably connected to the two first sleeve rings 4. Specifically, a groove is formed on the side of one of the first sleeve rings 4, at the middle position in the thickness direction. The groove directly penetrates the inner wall of the first sleeve ring 4, allowing it to communicate with the internal cavity of the first sleeve ring 4. The other first sleeve ring 4 is slidably connected to the groove. The advantage of this arrangement is that no additional sliding connection structure is needed, and when force is applied to the two first sleeve rings 4, the direction of the force is in the same plane, making the relative sliding of the two first sleeve rings 4 relatively stable. Of course, the first sleeve ring 4 in this embodiment does not necessarily have to be a complete ring; it can also have an opening on one side of the ring. The size of the opening is smaller than the diameter of the tube body 1, ensuring that the first sleeve ring 4 does not detach from the tube body 1. The number of springs 5 ​​can be one or more. The contraction direction of the multiple springs 5 ​​is set along the sliding direction of the first sleeve ring 4, and the two ends of the springs 5 ​​respectively abut against the two first sleeve rings 4. When the clamping member 3 is fitted onto the tube body 1, the spring 5 pushes the two first collars 4 away from each other. Since both first collars 4 are fitted onto the tube body 1, when they move away from each other, the forces exerted by their inner walls on the tube body 1 are in opposite directions, thus fixing the clamping member 3 onto the tube body 1. When it is necessary to move the clamping member 3, press the two first collars 4 with your fingers, causing them to compress the spring 5. This loosens the inner walls of the first collars 4 against the tube body 1, allowing the clamping member 3 to slide up and down the tube body 1 to adjust its position. The clamping member 3 in this embodiment is small in size and can be operated with one hand, making it convenient to use.

[0047] Example 2

[0048] Please refer to Figure 3 and Figure 4 In this embodiment, the clamping member 3 includes a clamping plate 6 and a fixing clip 7. The clamping plate 6 can be circular, with a notch at its edge matching the diameter of the tube body 1. The tube body 1 extends into the notch, so that the clamping plate 6 is fitted onto the tube body 1. At this time, the side of the clamping plate 6 closest to the airbag 2 is the clamping surface. The fixing clip 7 is located on the side of the clamping plate 6 away from the clamping surface. Specifically, the fixing clip 7 includes two hinged plates and a torsion spring 8. The hinge axis of the two plates is connected to the clamping plate 6. With the hinge axis as the boundary, the two plates on the same side of the hinge axis are set in an arc shape matching the tube body 1, and the other side is set in a handle style. The torsion spring 8 is located on the hinge axis and is used to push the two plates to rotate relative to each other, and the force of the torsion spring 8 tends to push the plates to clamp the tube body 1. When it is necessary to move the clamping member 3, press the handle with your finger to move the two plates away from each other at their curved ends, thereby releasing the clamped tube 1 and allowing the clamping member 3 to slide up and down on the tube 1. Releasing the handle causes the two plates to clamp the tube 1 under the action of the torsion spring 8, thus fixing the clamping member 3 to the tube 1. The clamping member 3 in this embodiment is small in size, can be operated with one hand, and is convenient to use. Furthermore, compared to Embodiment 1, this clamping member 3 does not need to be pre-installed on the tube 1.

[0049] Example 3

[0050] Please refer to Figure 5 and Figure 6 In this embodiment, the clamping member 3 includes an insert 9 and two second rings 10. The insert 9 is annular and sleeved on the tube body 1, and a bevel is provided on the top of the outer side wall of the insert 9. Both second rings 10 are sleeved on the insert 9, and the two second rings 10 are connected by threads, that is, the two second rings 10 can move away from each other or move closer to each other in the axial direction by rotation.

[0051] like Figure 6 As shown, the insert 9 itself has a certain degree of elasticity, and a slot is provided on the annular insert 9, making it easier for the insert 9 to deform. When the clamping member 3 is assembled on the tube body 1, the inner wall of the upper second ring 10 abuts against the inclined surface at the upper end of the insert 9. When the upper second ring 10 is rotated in one direction, the two second rings 10 move closer to each other, causing the inner wall of the upper second ring 10 to press against the inclined surface. A component force is generated on the inclined surface of the insert 9 in the direction of the axis of the tube body 1, pushing the upper end of the insert 9 (i.e., the end with the inclined surface) to deform in the direction of the tube body 1, thereby clamping and fixing the tube body 1.

[0052] When it is necessary to move the clamping member 3, rotate the upper second ring 10 in another direction so that the two second rings 10 move away from each other. The upper second ring 10 is no longer pressing the inclined surface of the insert 9. Then, the insert 9 returns to its original shape and detaches from the tube 1 due to its own elastic properties. At this time, the clamping member 3 can move freely on the tube 1. The clamping member 3 in this embodiment can be fixed very firmly and has a good locking effect.

[0053] Example 4

[0054] Please refer to Figure 7 and Figure 8 In this embodiment, the clamping member 3 includes two semi-ring blocks 11 and a latch 12. The semi-ring blocks 11 are blocks with arc-shaped grooves. The two arc-shaped grooves match the tube body 1, clamping the tube body 1 when closed. For this purpose, one end of the two semi-ring blocks 11 is hinged to each other (the two semi-ring blocks 11 can be integrally formed, partially connected at the ends, utilizing their own flexibility to achieve the hinge). The other end is locked and opened via the latch 12. Specifically, the latch 12 includes a strip-shaped portion and a hook-shaped portion connected to one end of the strip-shaped portion. The strip-shaped portion is hinged to the end of one of the semi-ring blocks 11 (similarly, the strip-shaped portion and the semi-ring block 11 can be integrally formed, partially connected at the ends, utilizing their own flexibility to achieve the hinge), while the end of the other semi-ring block 11 has a hook groove that matches the hook-shaped portion. When the clamping member 3 is fixed, the two semi-ring blocks 11 close to clamp the tube body 1. Then, the strip-shaped part is pried, causing the hook-shaped part to extend into the hook groove, thus locking the two semi-ring blocks 11. At this time, the clamping member 3 is fixed to the tube body 1. When it is necessary to move the clamping member 3, the strip-shaped part is pressed, and the hook-shaped part is lifted and disengaged from the hook groove. At this time, the two semi-ring blocks 11 are naturally released, allowing the clamping member 3 to slide up and down on the tube body 1. The clamping member 3 in this embodiment can be operated with one hand, is convenient to use, has a good locking effect, and does not need to be pre-fitted onto the tube body 1.

[0055] In other embodiments, the laparoscopic surgical puncture cannula further includes a balloon membrane, a restraint cannula 13, and an air valve 14. For example... Figure 9 As shown, the airbag membrane is inserted into the restraint sleeve 13 and fixed by adhesive or heat fusion, with one section of the airbag membrane located outside the restraint sleeve 13. The combined and fixed airbag membrane and restraint sleeve 13 are then fitted onto the tube body 1, with an inflation gap between the airbag membrane and the tube body 1. The two ends of the airbag membrane are then bonded or heat-fused to the tube body 1, sealing the interior of the airbag membrane. An air nozzle 14 is located on the tube body 1 and communicates with the inflation gap. When inflated through the air nozzle 14, the gas causes the airbag membrane located outside the restraint sleeve 13 to expand, forming the aforementioned airbag 2. When deflated through the air nozzle 14, the elasticity of the airbag membrane causes the airbag 2 to return to its original position, restoring the membrane state. Please refer again... Figure 9The end of pipe body 1 is set as a straight face, that is, the direction of the end face is perpendicular to the axis of pipe body 1 (the end of pipe body 1 is...). Figure 9 The right end of the cannula is rounded at the edge. Compared with the traditional cannula design with a sharp, beveled end, this design has two advantages: first, it avoids the risk of accidental damage to internal organs after the needle core is withdrawn; second, it avoids the need for the entire sharp, beveled end of the cannula to remain inside the abdominal cavity via the puncture channel, thus preventing the sharp, beveled end from reducing the range of laparoscopic procedures.

[0056] In the aforementioned cannula components, the tube body 1 can be made of PC. The air bladder 2 can be made of PE or TPU. The clamping component 3 can be made of PC or PP. In particular, in embodiment four, the clamping component 3, made of PP material, utilizes the elasticity and flexibility of the material itself to firmly clamp the tube body 1.

[0057] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0058] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A laparoscopic surgical puncture cannula, characterized in that, include: tube body(1); An airbag (2) is fitted onto one end of a tube (1) and is used to inflate and expand along the diameter of the tube (1). A clamping member (3) is movably mounted on the tube body (1); the side of the clamping member (3) near the airbag (2) is set as a clamping surface, and the clamping surface and the airbag (2) cooperate with each other to clamp on opposite sides of the surgical puncture site, so that the tube body (1) is fixed on the surgical puncture site.

2. The laparoscopic surgical puncture cannula according to claim 1, characterized in that, The clamping member (3) includes an elastic member, which is used to fix the clamping member (3) relative to the tube body (1) by means of elastic force, and to move the position of the connecting member on the tube body (1).

3. The laparoscopic surgical puncture cannula according to claim 2, characterized in that, The clamping member (3) includes: Two first rings (4) are fitted onto the pipe fitting; the two first rings (4) are slidably connected to each other; A spring (5) is disposed between two first rings (4) for pushing the two first rings (4) away from each other to clamp the tube body (1).

4. The laparoscopic surgical puncture cannula according to claim 3, characterized in that, One of the first collars (4) has a groove in the middle of its side in the thickness direction, and the groove is connected to the inside of the first collar (4); the other first collar (4) is slidably connected to the groove.

5. The laparoscopic surgical puncture cannula according to claim 2, characterized in that, The clamping member (3) includes: The clamping plate (6) has a notch on one side that matches the diameter of the tube body (1); the side of the clamping plate (6) near the airbag (2) is the clamping surface; The fixing clamp (7) includes two hinged plates and a torsion spring (8); the hinge axis of the two plates is connected to the side of the clamping plate (6) away from the clamping surface; the torsion spring (8) is used to push the two plates to rotate to clamp the tube body (1).

6. The laparoscopic surgical puncture cannula according to claim 1, characterized in that, The clamping member (3) includes: An insert (9) is fitted onto the tube body (1); the insert (9) is provided with an inclined surface; Two second rings (10) are fitted onto the insert (9); the two second rings (10) are threaded together; the inner wall of one of the second rings (10) abuts against the inclined surface on the insert (9); when the two second rings (10) move away from or closer to each other through the threads, the second rings (10) press the inclined surface to deform the insert (9) in the direction of the tube body (1) axis to clamp the tube body (1).

7. The laparoscopic surgical puncture cannula according to claim 1, characterized in that, The clamping member (3) includes: Two semi-ring blocks (11) are fitted onto the pipe fitting; one end of the two semi-ring blocks (11) is hinged to each other; A snap fastener (12) is provided at the other end of the two semi-ring blocks (11) for locking when the two semi-ring blocks (11) close together to clamp the pipe fitting.

8. The laparoscopic surgical puncture cannula according to claim 7, characterized in that, The buckle (12) includes a strip-shaped part and a hook-shaped part connected to one end of the strip-shaped part; the strip-shaped part is hinged to the end of one of the semi-ring blocks (11); the end of the other semi-ring block (11) is provided with a hook groove that matches the hook-shaped part.

9. The laparoscopic surgical puncture cannula according to claim 1, characterized in that, The laparoscopic surgical puncture cannula also includes: An airbag membrane is fitted onto the tube body (1); an inflation gap is provided between the airbag membrane and the tube body (1); A restraint sleeve (13) is fitted onto the airbag membrane; a section of the airbag membrane is located outside the restraint sleeve (13); the airbag membrane located outside the restraint sleeve (13) is expanded by gas to form the airbag (2); The air nozzle (14) is connected to the tube body (1) and is used to fill or release air into the air gap.

10. The laparoscopic surgical puncture cannula according to claim 1, characterized in that, The end face of the tube (1) is perpendicular to the axis of the tube (1), and the end of the tube (1) is rounded.

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