A sleeveless laparoscopic surgical instrument, a puncture device and an assembly method

Abstract

The application discloses a no-guard tube laparoscopic surgical instrument, a puncture device and an assembling method. The surgical instrument comprises a clamping part, a connecting part and a hand-holding part which can be connected in sequence. The connecting part comprises mutually parallel pull rods and support rods. The same direction one end of the pull rods and the support rods is connected with the clamping part, and the same direction other end is connected with the hand-holding part. The pull rods and the support rods are all solid metal rods with a diameter less than 2mm. The application changes the traction mode of the single rod in the traditional mode by adding the support rods. The geometric distribution structure of the multiple rods makes the anti-deformation ability of the pull rods not reduced even if the rod diameter is reduced. The multiple rods can bear the force in all directions in the operation, and the metal rods can be conveniently cleaned after the operation and reused.

Description

Technical Field

[0001] This invention relates to the field of medical devices, specifically to a tubeless laparoscopic surgical instrument, a trocar, and an assembly method. Background Technology

[0002] Conventional laparoscopic surgical instruments are generally a combination of a hollow sleeve and a traction connecting rod in normal size. Considering the various temporary situations that may arise during surgery, the surgical instruments are designed to be relatively large, which will leave a more obvious scar on the patient's abdomen after the operation.

[0003] With the development of medical technology, the goal of laparoscopic surgery is to achieve minimally invasive surgery. To achieve this, it is necessary to change the traditional laparoscopic surgical methods and corresponding instruments, especially to reduce the size of the instruments and change their combination structure, so as to achieve the effect of minimal invasiveness while meeting the surgical purpose.

[0004] The applicant's earlier application (202321713855X) already designed a device with a minimal structure that meets clinical requirements under current technological conditions. However, this design still faces shortcomings in complex surgical situations. For example, the radial and rolling forces on the device after clamping the target may cause the small-diameter hollow sleeve to bend and deform, leading to device damage. Furthermore, cleaning the small-diameter hollow sleeve after surgery is very difficult, making it unusable and indirectly increasing surgical costs. Therefore, surgical instruments still need improvement to meet the needs of different surgical environments. Summary of the Invention

[0005] The purpose of this invention is to design a novel laparoscopic surgical instrument structure that, while reducing instrument size, alters the force-bearing structure of traditional laparoscopic surgical instruments to meet various force-bearing conditions during surgery and to achieve the goal of minimally invasive procedures.

[0006] The solution of the present invention:

[0007] A method for assembling a tubeless laparoscopic surgical instrument includes a clamping part, a connecting part, and a hand-held part that can be connected sequentially.

[0008] The clamping part includes a clamp head with a through traction cavity inside. One end of the clamp head is fixedly connected to a surgical forceps, and the other end of the clamp head has a first connecting hole. The traction end of the surgical forceps is located inside the traction cavity.

[0009] The handheld part includes a connecting part, a front end of the handle, and a rear end of the handle that can be connected sequentially. The connecting part, the front end of the handle, and the rear end of the handle are provided with a cavity that runs through them from front to back. The front end of the connecting part is provided with a second connecting hole.

[0010] The connecting part includes a pull rod and a support rod that are parallel to each other. One end of the pull rod is connected to the traction end of the surgical forceps by a thread, and the other end of the pull rod passes through the cavity of the handle and is connected to the rear end of the handle. The two ends of the support rod are respectively connected to the first connecting hole and the second connecting hole.

[0011] In the above technical solution, a third connecting hole is provided on the connecting end face of the traction end. The third connecting hole is connected to one end of the pull rod by a thread, and the other end of the pull rod is connected to a pin passing through the rear end of the handle in the cavity of the hand-held part.

[0012] In the above technical solution, a through hole communicating with the cavity is provided on the top of the rear end of the handle, and a pin is provided in the through hole.

[0013] In the above technical solution, one end of the support rod is threaded and is connected to the first connecting hole by the thread, while the other end of the support rod is a smooth section that is connected to the second connecting hole.

[0014] In the above technical solution, a through pin hole is provided on the side wall of the second connecting hole on the connecting part, and a locking pin is provided in the pin hole.

[0015] In the above technical solution, the tie rod and the support rod are solid rods with a diameter of less than 2mm.

[0016] In the above technical solution, there are no fewer than two support rods, the diameters of the support rods and the tie rods are much smaller than 2mm, and the support rods and the tie rods do not contact each other.

[0017] A puncture device includes a baffle and a plurality of puncture needles fixedly arranged in parallel on the same side of the baffle.

[0018] A method for assembling a laparoscopic surgical instrument without a protective tube, the method for assembling the surgical instrument during surgery includes the following steps:

[0019] Step 1: Insert the separate pull rod and support rod into the abdominal cavity through punctures in the abdomen;

[0020] Step 2: Insert a transducer into the abdominal cavity through the pre-established abdominal passage at the patient's navel;

[0021] Step 3: The procedure is performed inside the abdominal cavity so that the pull rod and the support rod are inserted from one end of the puncture converter and exit from the other end of the puncture converter to outside the abdominal cavity;

[0022] Step 4: Outside the abdominal cavity, connect the pull rod and support rod to the forceps head respectively;

[0023] Step 5: After connecting the pliers head, connect the other end of the pull rod and the support rod to the connecting end of the hand handle at the same time. Lock the pull rod with the locking pin and fix the support rod with the pin.

[0024] Step Six: Drag the lever and support rod to move the forceps head from the puncture converter into the abdominal cavity;

[0025] Step 7: After the surgery is completed, perform the reverse operation from Step 6 to Step 1 to disassemble the instruments.

[0026] In the above technical solution, in step one, a puncture device is first used to puncture the abdominal cavity. After the puncture device is withdrawn, the pull rod and the support rod are each punctured into the abdominal cavity through a puncture hole.

[0027] In the above technical solution, the isolation distance between the two puncture needles of the puncture device is equal to the isolation distance between the pull rod and the support rod of the surgical instrument.

[0028] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0029] This invention solves the problem in the prior art that the traction rod is too thin to withstand large radial forces in order to pursue minimally invasive surgery. By setting two solid rods, the hollow tube that is required in traditional laparoscopic instruments is replaced with a solid rod, and the diameter of the rod inside the solid rod is greatly increased. After forming two solid rods, the radial force-bearing area is increased, which enhances the stress strength of the entire instrument.

[0030] By using a dual-bar design, the diameter of the bar can be reduced to 2mm, and a solid diameter is used, eliminating the risk of deformation of the traction bar during surgery. We have also eliminated the structure of changing the direction of the forceps head through the handle, which shortens the entire lever arm by 70mm. This function is not widely used in clinical scenarios, thus meeting the clinical need for multi-angle traction to expose tissues.

[0031] Solid metal rods greatly facilitate postoperative cleaning. Traditional laparoscopes have a hollow tube structure, and blood or other substances may enter the hollow tube during clinical use. Traditional laparoscopes have a diameter of 5mm, and the hollow tube diameter is relatively large, allowing for cleaning. However, when the hollow tube diameter is reduced to 2mm or less, it becomes difficult to complete standard cleaning of a lumen with an inner diameter of less than 2.0mm. Therefore, these instruments are for single use only, and laparoscopic instruments that cannot be properly cleaned are prohibited from being sterilized and reused. The double solid rod design prevents the instruments from deforming and allows for multiple uses. Attached Figure Description

[0032] The present invention will be described by way of example and with reference to the accompanying drawings, wherein:

[0033] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0034] Figure 2 yes Figure 1Enlarged diagram of section A in the middle;

[0035] Figure 3 yes Figure 1 Enlarged diagram of section B;

[0036] Figure 4 yes Figure 1 Enlarged diagram of section B;

[0037] Figure 5 This is a schematic diagram of the puncture needle;

[0038] Figure 6 This is a connection diagram extending from this embodiment;

[0039] Wherein: 1 is the clamp head, 2 is the traction end, 3 is the traction cavity, 4 is the pull rod, 5 is the support rod, 6 is the clamp, 7 is the connecting part, 8 is the front end of the handle, 9 is the rear end of the handle, 10 is the locking pin, 11 is the insertion pin, 12 is the puncture needle, and 13 is the baffle. Detailed Implementation

[0040] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0041] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features for a similar purpose, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0042] like Figure 1 The diagram shown is a schematic of the overall structure of this embodiment, which is divided into three parts: the connection part A between the clamping part and the rod, the connection part B between the rod and the handle, and the rear end part C of the handle.

[0043] like Figure 2 The diagram shows the structure of part A. The forceps head 1 has a traction cavity 3 extending through both ends. A first connecting hole is provided at one end of the forceps head, and one end of the support rod 5 is threaded into the first connecting hole. One end of the surgical forceps is fixedly connected to one end of the forceps head 1, and the traction end 2 of the forceps head 1 is located within the traction cavity 3. A second connecting hole is provided at the end of the traction end 2, and one end of the pull rod 4 is threaded into the second connecting hole. The other end of the traction end 2 is connected to the surgical forceps via a hinge 6.

[0044] The biggest difference between this embodiment and the prior art is that both the pull rod 4 and the support rod 5 are solid metal rods with a diameter of no more than 2mm. The two solid metal rods not only meet the requirements of the operation, but also make cleaning after the operation very convenient and can be reused multiple times.

[0045] like Figure 3 The diagram shown is an enlarged view of part B. The front end of the handle 8 is used to connect to a connecting part 7. A second connecting hole is provided on the front surface of the connecting part 7, which is used to connect to one end of the support rod 4. The smooth end of the support rod 4 is inserted into the second connecting hole. To ensure the support rod 4 is fixed, a pin hole is provided on the side of the connecting part 7, extending from the outside into the second connecting hole. A locking pin 10 is threaded into the pin hole. By rotating the locking pin 10, the support rod is pressed, thereby achieving a fixed connection between the support rod 4 and the connecting part 7.

[0046] like Figure 3 , Figure 4 As shown, after the connecting part 7 is fixedly connected to the front end 8 of the handle, a cavity is provided through both ends from the connecting part 7, the front end 8 of the handle, and the rear end 9 of the handle. The pull rod 5 is set in the cavity, and one end of the pull rod 5 is connected to the rear end 9 of the handle. A through hole is provided at the top of the rear end 9 of the handle, which leads to the cavity. A pin 11 is provided in the through hole. The pin 11 is snapped to the pull rod 5. Thus, by opening and closing the front end and the rear end of the handle, the pin 11 can drive the pull rod 5 to open and close the surgical forceps.

[0047] In this embodiment, the first connecting hole and the second connecting hole are on the same axis, and the traction cavity and the cavity are on the same axis. The support rod connecting between the first connecting hole and the second connecting hole and the axis of the pull rod connecting between the traction cavities are parallel to each other.

[0048] like Figure 5 As shown, this is a puncture device used in conjunction with the surgical instruments in this embodiment. The puncture device includes a baffle 13, and two puncture needles 12 are fixedly arranged on the same side of the baffle. The distance between the puncture needles 12 is equal to the distance between the pull rod 5 and the support rod 4 in the instrument.

[0049] In this embodiment, the clamping part, connecting part, and hand-held part are detachable and assembleable. In the early stages of surgery, they are disassembled and assembled inside the patient's abdominal cavity. The specific procedure is as follows:

[0050] Step 1: First, use, for example... Figure 5 The trocar shown is used to puncture the patient's abdomen. After the trocar is removed, two puncture holes will remain in the abdomen.

[0051] Step 2: Insert the lever into the abdominal cavity through one of the puncture holes, and insert the support rod into the abdominal cavity through the other puncture hole.

[0052] Step 3: Insert a puncture converter into the abdominal cavity through the pre-established laparoscopic channel on the patient's navel. Guide the pull rod and support rod into the puncture converter within the abdominal cavity, and exit from the other end of the puncture converter to the outside of the abdominal cavity.

[0053] Step 4: Manually connect the forceps head to the pull rod and support rod outside the abdominal cavity;

[0054] Step 5: Connect the connected pliers head, the other end of the pull rod and the support rod to the connecting end of the hand-held part at the same time, and fix the pull rod and the support rod with the locking screw.

[0055] Step Six: By dragging the lever and support rod with the handle, the forceps head is moved from the puncture converter into the abdominal cavity;

[0056] Step 7: After the surgery is completed, perform the reverse operation from Step 6 to Step 1 to disassemble the instruments and remove them from the abdominal cavity.

[0057] To further address the challenges encountered during actual surgery, this embodiment can be expanded. Depending on the specific surgical needs, the diameters of the support rods and tie rods can be further reduced, while the number of support roots can be increased. The support rods and tie rods are then isolated from each other, forming a stable geometric structure. In this way, even though reducing the diameter of the support rods and tie rods decreases their inherent physical properties, the change in geometric structure simultaneously increases tensile and deformation resistance. For example, designing the support rods and tie rods in a triangular distribution will greatly enhance deformation resistance due to the stability principle of a triangle.

[0058] like Figure 6 The diagram shows a connection structure for when the diameter of the pull rod is very small. When the diameter of the pull rod is reduced significantly and becomes a thin rod, the threaded connection cannot ensure a reliable connection. In this case, the pull rod 5 is inserted into the cross slot of the connecting part 7. A locking nut 7-1 is connected to the outer wall of the connecting part 7. By changing the position of the locking nut 7-1, sufficient compressive force can be provided to the cross slot on the connecting part 7, thereby completing the locking function of the pull rod.

[0059] This invention is not limited to the specific embodiments described above. The invention extends to any new feature or combination disclosed in this specification, as well as any new method or process step or combination disclosed herein.

Claims

1. A laparoscopic surgical instrument without a protective tube, comprising a clamping part, a connecting part, and a hand-held part that can be connected in sequence, characterized in that: The clamping part includes a clamp head with a through traction cavity inside. One end of the clamp head is fixedly connected to a surgical forceps, and the other end of the clamp head has a first connecting hole. The traction end of the surgical forceps is located inside the traction cavity. The handheld part includes a connecting part, a front end of the handle, and a rear end of the handle that can be connected sequentially. The connecting part, the front end of the handle, and the rear end of the handle are provided with a cavity that runs through them from front to back. The front end of the connecting part is provided with a second connecting hole. The connecting part includes a pull rod and a support rod that are parallel to each other. One end of the pull rod is connected to the traction end of the surgical forceps by a thread, and the other end of the pull rod passes through the cavity of the handle and is connected to the rear end of the handle. The two ends of the support rod are respectively connected to the first connecting hole and the second connecting hole.

2. The laparoscopic surgical instrument without a protective tube according to claim 1, characterized in that: A third connecting hole is provided on the connecting end face of the traction end. The third connecting hole is connected to one end of the pull rod by a thread, and the other end of the pull rod is connected to a pin passing through the rear end of the handle in the cavity of the hand-held part.

3. The laparoscopic surgical instrument without a protective tube according to claim 2, characterized in that: The top of the handle's rear end is provided with a through hole that connects to the cavity, and a pin is provided inside the through hole.

4. The laparoscopic surgical instrument without a protective tube according to claim 1, characterized in that: One end of the support rod is threaded and is connected to the first connecting hole via the thread. The other end of the support rod is a smooth section that is connected to the second connecting hole.

5. The laparoscopic surgical instrument without a protective tube according to claim 4, characterized in that: A through pin hole is provided on the side wall of the second connecting hole on the connecting part, and a locking pin is provided in the pin hole.

6. A laparoscopic surgical instrument without a protective tube according to any one of claims 1-5, characterized in that: The tie rod and support rod are solid rods with a diameter of less than 2mm.

7. The laparoscopic surgical instrument without a protective tube according to claim 1, characterized in that: There are at least two support rods, and the support rods and the tie rods do not contact each other.

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