Drainage catheter reserving device for endoscopic surgery

Abstract

The drainage catheter reserving device comprises a reserving outer tube, a connecting inner tube is arranged in the reserving outer tube, the outer wall of the connecting inner tube is connected with a preset drainage tube in a matched mode, the preset drainage tube is connected with the reserving outer tube in a matched mode, and the inner wall of one end of the connecting inner tube is connected with a skin breaking knife in a matched mode. The invention relates to the technical field of medical apparatus and instruments, adopts a drainage tube placement mode of in-vivo puncture, effectively avoids the problems of accidental injury of visceral organs, infection caused by bacteria brought in and the like possibly caused by in-vitro puncture in a traditional reservation mode, reserves a drainage catheter during an operation, avoids secondary injury to a patient caused by in-vitro puncture after the operation, and improves the operation safety of the patient. The time and the cost for treating the lacuna effusion of the patient are reduced, the efficiency of treating the lacuna effusion is guaranteed, and the safety of an operation and the comfort of the patient are improved.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a drainage catheter pre-installation device for laparoscopic surgery. Background Technology

[0002] Laparoscopic surgery is a modern minimally invasive surgical technique. Instruments equipped with a light source and camera are inserted through tiny incisions or natural cavities. Surgeons perform the procedure under monitor guidance. Its core advantages include minimal trauma, rapid recovery, less pain, and the ability to observe deep tissues from multiple angles, reducing the risk of misdiagnosis and allowing patients to be discharged sooner. It has been widely used in thoracic and abdominal surgeries. However, an unavoidable problem in laparoscopic surgery is the presence of varying degrees of fluid accumulation in postoperative cavities, such as pleural effusion, ascites, pelvic effusion, and subcutaneous effusion (seroma) following laparoscopic hernia surgery. These effusions are detrimental to postoperative recovery. If the effusion persists for a long time, it may cause various complications such as cavity infection, atelectasis, and bowel dysfunction.

[0003] The current treatment for most cavity effusions involves puncture and aspiration or catheter drainage. However, current drainage methods almost always involve placing a drainage tube from outside the body into the cavity after surgery. This method of placing the drainage tube from outside the body may accidentally damage the organs in the cavity when puncturing it into the cavity, and may also introduce bacteria from outside the body into the cavity during the placement process, which may lead to infection and exacerbate the patient's pain. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a drainage catheter pre-reservation device for laparoscopic surgery, which solves the problems of potential accidental damage to organs in the cavity when the drainage tube is placed from outside the body, and the possibility of introducing bacteria from outside the body into the cavity during placement, which may lead to infection and exacerbate the patient's pain.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a pre-installed drainage catheter device for laparoscopic surgery includes a pre-installed outer tube, a connecting inner tube disposed inside the pre-installed outer tube, a pre-installed drainage tube connected to the outer wall of the connecting inner tube, the pre-installed drainage tube being connected to the pre-installed outer tube, and a scalpel connected to the inner wall of one end of the connecting inner tube. The pre-installed drainage catheter device for laparoscopic surgery also includes a manually controlled pushing structure disposed at the end of the pre-installed outer tube away from the scalpel; a safety component disposed at the end of the pre-installed outer tube away from the scalpel. The manually controlled pushing structure pushes the connecting inner tube, causing the scalpel to extend from the inside of the pre-installed outer tube and perform a scalpel operation from the inside of the abdominal cavity. After the pre-installed outer tube and the connecting inner tube are withdrawn, the pre-installed drainage tube is left in the abdominal cavity for drainage.

[0006] Preferably, the hand-controlled pushing structure includes a handle shell, which is located at the end of the pre-reserved outer tube away from the piercing knife; a central pushing rod is movably connected to the inner wall of the handle shell; a first connecting rod is located at the end of the central pushing rod near the piercing knife, fixedly connected to the inner wall of the connecting inner tube, and also connected to the inner wall of the pre-placed drainage tube; a limiting structure is located inside the handle shell; a shell fixing structure is located at the end of the handle shell near the piercing knife; and a hand-held operating structure is located at the end of the handle shell away from the piercing knife. The handle shell is fixed to the pre-reserved outer tube by the shell fixing structure, and by pushing the central pushing rod, precise pushing of the connecting inner tube, the pre-placed drainage tube, and the piercing knife is achieved, thereby performing abdominal puncture.

[0007] Preferably, the limiting structure includes guide grooves, with multiple guide grooves equidistantly located on the inner wall of the handle housing; multiple limiting clips, equidistantly located at one end of the central push rod near the first connecting rod, and connected to the inner wall of the guide grooves; and positioning clips located inside the guide grooves and connected to the limiting clips. The cooperation of the guide grooves and limiting clips allows the central push rod to move along a predetermined trajectory when pushed, while the positioning clips limit the limiting clips at specific positions, maintaining the relative stability of the central push rod.

[0008] Preferably, the outer shell fixing structure includes a threaded connection end, which is located at the end of the handle outer shell near the piercing knife, and its inner wall is fitted to the end of the reserved outer tube away from the piercing knife; a fixing sleeve is threaded to the outer wall of the threaded connection end; wherein, by tightening the fixing sleeve at the threaded connection end, the threaded connection end clamps and fixes the reserved outer tube, thereby fixing the reserved outer tube to the handle outer shell, and at the same time, facilitating disassembly and separation.

[0009] Preferably, the handheld operating structure includes two finger operating rings, which are respectively located on both sides of the end of the handle shell away from the dermatograph; and a finger push ring is located at the end of the central push rod away from the first connecting rod. The combination of the finger operating rings and the finger push rings allows medical staff to operate the instrument more conveniently and stably.

[0010] Preferably, the piercing knife includes a cylindrical rod that is fitted to the inner wall of a pre-reserved outer tube; a second connecting rod is located at the end of the cylindrical rod near the handle housing, and its outer wall is fitted to the end of the connecting inner tube away from the handle housing; a triangular pyramid is located at the end of the cylindrical rod away from the second connecting rod; wherein, the piercing knife is connected to the connecting inner tube through the cylindrical rod, and when the central push rod is pushed, the triangular pyramid pierces the abdominal skin tissue.

[0011] Preferably, the safety component includes a positioning hole located on one side of the outer wall of the central push rod; an arc-shaped plate fitted to the outer wall of the central push rod and also fitted to the end of the handle housing away from the dermabrasion knife; and a positioning rod located on the inner wall of the arc-shaped plate and fitted to the inner wall of the positioning hole. The positioning hole, arc-shaped plate, and positioning rod work together to fix the central push rod when no surgical operation is being performed, thus providing a safety function. When abdominal puncture is required, the arc-shaped plate is removed to release the fixation of the central push rod.

[0012] Preferably, a compression spring is connected to the outer wall of the first connecting rod, and the two ends of the compression spring abut against the handle housing and the central push rod, respectively.

[0013] Preferably, the end of the pre-installed drainage tube away from the handle shell is fitted with a protective cover.

[0014] Beneficial effects

[0015] This invention provides a drainage catheter placement device for laparoscopic surgery. It offers the following advantages: Before suturing the laparoscopic surgical incision, the device inserts the end of the pre-placed outer tube into the abdominal cavity through the surgical incision. A manually controlled push mechanism then moves the connecting inner tube, allowing the tip of the scalpel to pierce the abdominal skin tissue and bring out the pre-placed drainage tube. By separating the pre-placed drainage tube from the pre-placed outer tube and connecting inner tube, the pre-placed drainage tube can be precisely placed within the patient's abdominal cavity. This internal puncture placement method effectively avoids the potential organ damage and bacterial infection problems associated with traditional external puncture methods. Furthermore, intraoperative placement of the drainage catheter avoids secondary injuries caused by postoperative external puncture, reducing the time and cost required for treating cavitary effusions and ensuring efficiency in this treatment. This contributes to improved surgical safety and patient comfort.

[0016] With the cooperation of the positioning hole, the arc plate, and the positioning rod, the safety assembly firmly fixes the central push rod in its initial position when no surgical operation is being performed. When abdominal puncture is required, medical staff only need to remove the arc plate from the central push rod, releasing the fixation restriction on the central push rod. At this time, the central push rod can be moved freely, thereby driving the connecting inner tube, the pre-placed drainage tube, and the scalpel to move, so as to complete the abdominal puncture and drainage tube placement operation. This can effectively improve the safety and controllability of the surgical operation and prevent the central push rod from moving due to accidental contact or other unexpected situations. This helps to avoid the danger caused by the accidental extension of the scalpel. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the appearance of the present invention; Figure 3 This is a schematic diagram showing the external appearance of the central push rod, the first connecting rod, and the limiting card in this invention; Figure 4 This is a cross-sectional view of the handle housing, guide groove, and positioning card in this invention; Figure 5 This is a schematic diagram showing the external appearance of the cylindrical rod, the second connecting rod, and the triangular pyramid in this invention; Figure 6 This is a schematic diagram of the appearance of the arc-shaped plate and the positioning rod in this invention; Figure 7 This is a schematic diagram of the appearance of the protective cover in this invention; Figure 8 for Figure 1 A magnified view of a portion of region A in the middle; Figure 9 for Figure 1 A magnified view of a portion of region B in the middle.

[0018] In the diagram: 1. Reserved outer tube; 2. Connecting inner tube; 3. Pre-installed drainage tube; 4. Peeling knife; 5. Hand-controlled push structure; 6. Safety component; 41. Cylindrical rod; 42. Second connecting rod; 43. Triangular pyramid; 51. Hand grip shell; 52. Central push rod; 53. First connecting rod; 54. Limiting structure; 55. Shell fixing structure; 56. Handheld operation structure; 541. Guide groove; 542. Limiting clip; 543. Positioning clip; 551. Threaded connection end; 552. Fixing sleeve; 561. Finger operating ring; 562. Finger push ring; 61. Positioning hole; 62. Arc plate; 63. Positioning rod; 7. Compression spring; 8. Protective cover. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Currently, the method of placing drainage tubes involves puncturing them from outside the body into the cavity, which may accidentally damage the organs inside the cavity. Furthermore, during the placement process, bacteria from outside the body may be introduced into the cavity, potentially leading to infection and exacerbating the patient's pain.

[0021] In view of this, the present invention provides a drainage catheter pre-reservation device for laparoscopic surgery. Before suturing the laparoscopic surgical incision, the end of the pre-reserved outer tube is inserted into the abdominal cavity through the surgical incision. The connecting inner tube is pushed by a hand-controlled push mechanism, causing the tip of the scalpel to pierce the abdominal skin tissue inside the abdominal cavity and bring out the pre-reserved drainage tube. By pulling out and separating the pre-reserved drainage tube from the pre-reserved outer tube and the connecting inner tube, the pre-reserved drainage tube is accurately pre-reserved in the patient's abdominal cavity. The method of placing the drainage tube through internal puncture can effectively avoid the problems of organ damage and bacterial infection that may be caused by external puncture in traditional drainage methods. Furthermore, pre-reserving the drainage catheter during the operation avoids secondary damage to the patient caused by postoperative puncture, reduces the time and cost required for the patient to treat cavitary effusion, ensures the efficiency of cavitary effusion treatment, and improves the safety of the operation and the patient's comfort.

[0022] Those skilled in the art can connect the components in this case sequentially. The specific connection and operation sequence should refer to the working principle described below. The detailed connection methods are well-known technologies in the field. The working principle and process are mainly described below.

[0023] Example 1: By Figures 1-9 It is known that a drainage catheter pre-reservation device for laparoscopic surgery includes a pre-reserved outer tube 1, a connecting inner tube 2 is provided inside the pre-reserved outer tube 1, a pre-placed drainage tube 3 is connected to the outer wall of the connecting inner tube 2, the pre-placed drainage tube 3 is connected to the pre-reserved outer tube 1, and a skin-piercing knife 4 is connected to the inner wall of one end of the connecting inner tube 2. The drainage catheter pre-reservation device for laparoscopic surgery also includes a hand-controlled pushing structure 5 and a safety component 6. The hand-controlled pushing structure 5 is located at the end of the pre-reserved outer tube 1 away from the skin-piercing knife 4; the safety component 6 is located at the end of the pre-reserved outer tube 1 away from the skin-piercing knife 4. The connecting inner tube 2 is pushed by the hand-controlled pushing structure 5, causing the skin-piercing knife 4 to extend out from the inside of the pre-reserved outer tube 1 and perform skin-piercing operation from the inside of the abdominal cavity. After the pre-reserved outer tube 1 and the connecting inner tube 2 are withdrawn, the pre-placed drainage tube 3 is left in the abdominal cavity for drainage operation.

[0024] In the specific implementation process, it is worth noting that both the reserved outer tube 1 and the connecting inner tube 2 are hollow circular pipe structures made of PVC, stainless steel, or lightweight aluminum alloy. The reserved outer tube 1 is 40-60cm long, with an outer diameter of 5-11mm, a wall thickness of 0.3-0.5mm, and an inner diameter of 4.5-11.5mm. It is used to protect its internal structure, especially the dermabrasion knife 4. The tip of the dermabrasion knife 4 is 0.5cm away from the end of the reserved outer tube 1 to prevent the dermabrasion knife 4 from damaging the organs and tissues in the cavity when it is not activated. The connecting inner tube 2 is located inside the reserved outer tube 1, with a gap of about 0.1mm between them. It can slide inside the reserved outer tube 1. Its length can be 35.5-55.5cm, with an outer diameter of 4.6-11.1mm, a wall thickness of 0.3-0.5mm, and an inner diameter of 4.1-11.5mm.The pre-installed drainage tube 3 is made of silicone and has a total length of approximately 35-55cm. It is available in 10F-24F sizes. After the drainage tube is pre-installed, one end, tightly connected to the tail end of the piercing knife 4, is connected to negative pressure drainage externally. The other end, away from the piercing knife 4, remains in the cavity to absorb accumulated fluid. It also has 3-5 suction slots, each 3-7cm long, to prevent the pre-installed drainage tube 3 from becoming blocked. The piercing knife 4 is made of stainless steel or lightweight aluminum alloy and has a total length of 5cm. The piercing end is approximately 3cm long, the cylindrical end is approximately 1cm long, and the connecting end is approximately 1cm long. The diameter of the connecting end matches the inner diameter of the connecting inner tube 2. By inserting the end of the connecting inner tube 2, the piercing knife 4 is connected to the inner tube. The inner tube 2 is installed and can be separated. Through the cooperation of the reserved outer tube 1, the inner tube 2, the pre-placed drainage tube 3, and the piercing knife 4, the pre-placed drainage tube 3 is fitted over the inner tube 2. When the inner tube 2 is pushed, the pre-placed drainage tube 3 moves synchronously. Simultaneously, the piercing knife 4 extends from the end of the reserved outer tube 1. When pre-placed the drainage tube, the end of the reserved outer tube 1 is inserted into the abdominal cavity through the surgical incision, located near the cavity requiring drainage on the inner side of the abdominal cavity. The end of the reserved outer tube 1 is aligned with the pre-piercing position. Then, the inner tube 2 is pushed using the hand-controlled pushing structure 5, causing the piercing knife 4 to extend from the end of the reserved outer tube 1, its tip piercing the abdominal skin. The skin tissue is removed, and the pre-placed drainage tube 3 is brought out. Then, the dermal incision knife 4 is separated from the connecting inner tube 2, and the pre-placed drainage tube 3 is pulled out and separated from the reserved outer tube 1 and the connecting inner tube 2, so that the pre-placed drainage tube 3 is left in the abdominal cavity for continuous drainage. The safety component 6 is used to fix the device when no surgical operation is performed to prevent the dermal incision knife 4 from moving due to accidental contact or other unexpected situations, thereby improving surgical safety. Through the cooperation between the reserved outer tube 1, the connecting inner tube 2, the pre-placed drainage tube 3, the dermal incision knife 4, the hand-controlled pushing structure 5, and the safety component 6, before the laparoscopic surgical incision is closed, the end of the reserved outer tube 1 is inserted into the abdominal cavity through the surgical incision, and then pushed by the hand-controlled pushing structure 5. The inner tube 2 is connected, allowing the tip of the dermabrasion knife 4 to pierce the abdominal skin tissue inside the abdominal cavity, bringing out the pre-placed drainage tube 3. By separating the pre-placed drainage tube 3 from the reserved outer tube 1 and the connecting inner tube 2, the pre-placed drainage tube 3 is precisely positioned within the patient's abdominal cavity. This internal puncture drainage tube placement method effectively avoids the potential organ damage and bacterial infection problems that can occur with traditional external puncture methods. Furthermore, pre-positioning the drainage catheter during the procedure avoids secondary harm to the patient from postoperative puncture, reducing the time and cost required for treating cavitary effusions, ensuring the efficiency of cavitary effusion treatment, and improving the safety and comfort of the surgery.

[0025] Furthermore, the hand-controlled pushing structure 5 includes a handle shell 51, a central pushing rod 52, a first connecting rod 53, a limiting structure 54, a shell fixing structure 55, and a hand-held operating structure 56. The handle shell 51 is located at the end of the reserved outer tube 1 away from the puncture knife 4; the central pushing rod 52 is movably connected to the inner wall of the handle shell 51; the first connecting rod 53 is located at the end of the central pushing rod 52 near the puncture knife 4, fixedly connected to the inner wall of the connecting inner tube 2, and also connected to the inner wall of the pre-placed drainage tube 3; the limiting structure 54 is located inside the handle shell 51; the shell fixing structure 55 is located at the end of the handle shell 51 near the puncture knife 4; and the hand-held operating structure 56 is located at the end of the handle shell 51 away from the puncture knife 4. The handle shell 51 is fixed to the reserved outer tube 1 through the shell fixing structure 55. By pushing the central pushing rod 52, the connecting inner tube 2, the pre-placed drainage tube 3, and the puncture knife 4 are precisely pushed to perform abdominal puncture.

[0026] In the specific implementation process, the handle shell 51 is fixed to the end of the reserved outer tube 1 away from the piercing knife 4 by means of threaded connection or snap-fit ​​fixation through the shell fixing structure 55. The first connecting rod 53 of the central push rod 52 is fixed to the end of the connecting inner tube 2 away from the piercing knife 4 by means of threaded connection or snap-fit ​​fixation. The handle shell 51, the central push rod 52 and the first connecting rod 53 are all made of ABS material or other materials, and the central push rod 52 and the first connecting rod 53 are inserted into the handle shell 51. By pushing the central push rod 52, the connecting inner tube 2 drives the piercing knife 4 and the pre-placed drainage tube 3 to move in the reserved outer tube 1, thereby performing the piercing operation on the abdominal skin tissue. The limiting structure 54 limits the central push rod 52 during the pushing process to ensure the stability of the piercing operation. The hand-held operation structure 56 is used to hold and push the handle shell 51 and the central push rod 52, improving the convenience and stability of the device operation.

[0027] Furthermore, the limiting structure 54 includes a guide groove 541, a limiting card 542, and a positioning card 543. Multiple guide grooves 541 are provided, equidistantly spaced on the inner wall of the handle housing 51. Multiple limiting cards 542 are provided, equidistantly positioned at one end of the central push rod 52 near the first connecting rod 53, and are connected to the inner wall of the guide groove 541. The positioning card 543 is located inside the guide groove 541 and is connected to the limiting card 542. Through the cooperation of the guide groove 541 and the limiting card 542, the central push rod 52 can move along a predetermined trajectory when pushed, while the positioning card 543 limits the limiting card 542 at a specific position, maintaining the relative stability of the central push rod 52.

[0028] In the specific implementation process, it is worth noting that when the central push rod 52 is pushed, the limiting card 542 slides inside the guide groove 541. The guide groove 541 forms a limiting guide for the central push rod 52 through the limiting card 542. When the limiting card 542 slides to the position of the positioning card 543, it forms a limit with the positioning card 543, thereby restricting the further movement of the central push rod 52, keeping the handle shell 51 and the central push rod 52 in a relatively stable state, and preventing the inner tube 2, the pre-placed drainage tube 3 and the dermabrasion knife 4 from moving, so as to facilitate the subsequent extraction and separation operation and ensure the smoothness and safety of the surgical procedure.

[0029] Furthermore, the outer shell fixing structure 55 includes a threaded connection end 551 and a fixing sleeve 552. The threaded connection end 551 is located at the end of the handle outer shell 51 near the piercing knife 4, and its inner wall is connected to the end of the reserved outer tube 1 away from the piercing knife 4. The fixing sleeve 552 is threadedly connected to the outer wall of the threaded connection end 551. By tightening the fixing sleeve 552 at the threaded connection end 551, the threaded connection end 551 clamps and fixes the reserved outer tube 1, thereby fixing the reserved outer tube 1 to the handle outer shell 51 and facilitating disassembly and separation.

[0030] In the specific implementation process, it is worth noting that the end of the reserved outer tube 1 away from the skin-breaking knife 4 is inserted into the inside of the threaded connection end 551. By tightening the fixing sleeve 552 on the threaded connection end 551, the threaded connection end 551 clamps and fixes the reserved outer tube 1, thereby fixing the reserved outer tube 1 to the handle shell 51. When disassembly is required, simply unscrew the fixing sleeve 552 from the threaded connection end 551 to easily separate the reserved outer tube 1 from the handle shell 51, ensuring the stability of the device during use and improving the convenience of its disassembly and assembly.

[0031] Furthermore, the handheld operating structure 56 includes a finger operating ring 561 and a finger push ring 562. Two finger operating rings 561 are provided, respectively located on both sides of the end of the handle housing 51 away from the dermabrasion knife 4; the finger push ring 562 is located at the end of the central push rod 52 away from the first connecting rod 53. The cooperation of the finger operating rings 561 and the finger push rings 562 makes it easier and more stable for medical staff to operate the instrument.

[0032] In the specific implementation process, it is worth noting that when medical staff operate the device, they can insert their index and middle fingers into the finger operation ring 561 and their thumb into the finger push ring 562. This allows for more precise and stable control of the movement of the central push rod 52, improving the convenience and stability of the device operation and reducing the risks that may arise from unstable operation.

[0033] Furthermore, the piercing knife 4 includes a cylindrical rod 41, a second connecting rod 42, and a triangular pyramid 43. The cylindrical rod 41 is connected to the inner wall of the reserved outer tube 1. The second connecting rod 42 is located at the end of the cylindrical rod 41 near the handle housing 51, and its outer wall is connected to the end of the connecting inner tube 2 away from the handle housing 51. The triangular pyramid 43 is located at the end of the cylindrical rod 41 away from the second connecting rod 42. The piercing knife 4 is connected to the connecting inner tube 2 through the cylindrical rod 41. When the central push rod 52 is pushed, the triangular pyramid 43 pierces the abdominal skin tissue.

[0034] In the specific implementation process, it is worth noting that the piercing knife 4 is composed of three parts: a cylindrical rod 41, a second connecting rod 42, and a triangular pyramid 43. It is made of stainless steel or lightweight aluminum alloy. The total length of the piercing knife 4 is 5cm, the length of the triangular pyramid 43 is about 3cm, the length of the cylindrical rod 41 is about 1cm, and the length of the second connecting rod 42 is about 1cm. The diameter of the second connecting rod 42 is the same as the inner diameter of the connecting inner tube 2. The piercing knife 4 is connected to the connecting inner tube 2 by inserting the second connecting rod 42 into the inner wall of the connecting inner tube 2. When the connecting inner tube 2 is pushed, it drives the piercing knife 4 to move, so that the triangular pyramid 43 pierces the abdominal skin tissue and allows the connecting inner tube 2, the pre-placed drainage tube 3, and the piercing knife 4 to pass out of the body.

[0035] Specifically, when using the laparoscopic surgical drainage catheter pre-reservation device, medical staff insert the end of the pre-reserved outer tube 1 into the patient's abdominal cavity through the surgical incision. They determine the pre-abrasion location near the cavity requiring drainage and precisely align the end of the pre-reserved outer tube 1 with this location. The medical staff insert their index and middle fingers into the finger operating ring 561 and their thumb into the finger pushing ring 562, pushing the central pushing rod 52 to advance the connecting inner tube 2 forward. This moves the pre-positioned drainage tube 3 and the abrasion knife 4 synchronously. The tip of the triangular pyramid 43 of the abrasion knife 4 extends from the end of the pre-reserved outer tube 1, piercing the abdominal skin tissue. When the limiting card 542 slides to the positioning card 5... At 43 o'clock, the positioning card 543 forms a limit, stopping the push of the central push rod 52. At this time, the end of the pre-placed drainage tube 3 near the dermal puncture knife 4 is brought out to the outside of the body, separating the dermal puncture knife 4 from the connecting inner tube 2. The end of the pre-placed drainage tube 3 near the dermal puncture knife 4 is fixed. The reserved outer tube 1 and the connecting inner tube 2 are pulled out from the patient's body, separating the pre-placed drainage tube 3 from the reserved outer tube 1 and the connecting inner tube 2. The position of the pre-placed drainage tube 3 is adjusted so that it is accurately placed in the cavity of the patient's abdomen where drainage is needed. Then, the end of the pre-placed drainage tube 3 outside the body is connected to a negative pressure drainage device so that the pre-placed drainage tube 3 can continuously drain.

[0036] Example 2: From Figure 1-9As can be seen, the safety component 6 includes a positioning hole 61, an arc-shaped plate 62, and a positioning rod 63. The positioning hole 61 is located on one side of the outer wall of the central push rod 52. The arc-shaped plate 62 is connected to the outer wall of the central push rod 52 and to the end of the handle shell 51 away from the dermabrasion knife 4. The positioning rod 63 is located on the inner wall of the arc-shaped plate 62 and is connected to the inner wall of the positioning hole 61. The positioning hole 61, the arc-shaped plate 62, and the positioning rod 63 work together to fix the central push rod 52 when no surgical operation is being performed, thus providing a safety function. When an abdominal puncture operation is required, the arc-shaped plate 62 is removed to release the fixation of the central push rod 52.

[0037] In the specific implementation process, it is worth noting that through the cooperation of positioning hole 61, arc plate 62 and positioning rod 63, arc plate 62 fits against the outer wall of central push rod 52, and positioning rod 63 is inserted into positioning hole 61, so that arc plate 62 forms a limit at handle shell 51, forming a stable locking structure for central push rod 52. When no surgical operation is performed, central push rod 52 is firmly fixed in the initial position. When abdominal puncture is required, medical staff only need to remove arc plate 62 from central push rod 52, releasing the fixation restriction on central push rod 52. At this time, central push rod 52 can be pushed freely, thereby driving the connecting inner tube 2, pre-placed drainage tube 3 and dermabrasion knife 4 to move, so as to complete abdominal puncture and drainage tube placement operations, effectively improving the safety and controllability of surgical operation, preventing the central push rod 52 from moving due to accidental contact or other unexpected situations, and thus avoiding the danger caused by accidental extension of dermabrasion knife 4.

[0038] Furthermore, a compression spring 7 is connected to the outer wall of the first connecting rod 53, and the two ends of the compression spring 7 abut against the handle housing 51 and the central push rod 52 respectively.

[0039] In the specific implementation process, it is worth noting that the compression spring 7 provides elastic force to the central push rod 52 to move away from the puncture knife 4. When no abdominal puncture operation is performed, the central push rod 52 is always in the initial position under the action of the compression spring 7, forming a double safety mechanism together with the arc plate 62, further reducing the risk of misoperation. When surgical operation is required, after the medical staff removes the arc plate 62, they still need to overcome the elastic force of the compression spring 7 to push the central push rod 52 to ensure the safety of the operation and provide a certain resistance feedback during the operation, allowing the medical staff to more accurately perceive the pushing force and progress. At the same time, after the limit card 542 and the positioning card 543 form a limit, the compression spring 7 pushes the central push rod 52, so that the limit card 542 and the positioning card 543 are kept tightly against each other, ensuring that the central push rod 52 can be stably stopped in the corresponding position after the puncture operation is completed, avoiding the displacement of the position of the puncture knife 4 and the pre-placed drainage tube 3 due to accidental shaking, which would affect the smooth progress of subsequent surgical procedures.

[0040] Furthermore, a protective cover 8 is connected to the end of the pre-installed drainage tube 3 that is away from the handle housing 51.

[0041] In the specific implementation process, it is worth noting that after the pre-installed drainage tube 3 is fixed, the protective cover 8 is put on the end of the pre-installed drainage tube 3 located outside the body to effectively protect the port of the pre-installed drainage tube 3, preventing external contaminants from entering the interior of the pre-installed drainage tube 3 during subsequent surgical operations or patient movement, and avoiding complications such as infection.

[0042] Specifically, based on the above embodiments, when no surgical operation is performed, the compression spring 7 forms a double safety mechanism with the arc-shaped plate 62 inside the handle housing 51. When a surgical operation is required, after the medical staff removes the arc-shaped plate 62, the compression spring 7 is compressed when the central push rod 52 is pushed. During the operation, the compression spring 7 provides a certain resistance feedback, allowing the medical staff to more accurately perceive the pushing force and progress. After the central push rod 52 is pushed to the designated position, the limit card 542 and the positioning card 543 form a limit. The compression spring 7 pushes the central push rod 52 to keep the limit card 542 and the positioning card 543 pressed together, ensuring that the central push rod 52 can be stably stopped in the corresponding position after the puncture operation is completed, so that the subsequent extraction and separation operation can be carried out smoothly.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A drainage catheter reservation device for endoscopic surgery, comprising a reservation outer tube (1), characterized in that: The reserved outer tube (1) is provided with a connecting inner tube (2), and a pre-placed drainage tube (3) is connected to the outer wall of the connecting inner tube (2). The pre-placed drainage tube (3) is connected to the reserved outer tube (1). A skin-piercing knife (4) is connected to the inner wall of one end of the connecting inner tube (2). The reserved device for the drainage catheter for laparoscopic surgery also includes: The manual push structure (5) is located at the end of the reserved outer tube (1) away from the skin-breaking knife (4); Safety component (6) is located at the end of the reserved outer tube (1) away from the dermal cutter (4); In this process, the connecting inner tube (2) is pushed by the hand-controlled pushing structure (5), so that the skin-breaking knife (4) extends out from the inside of the reserved outer tube (1) and performs skin-breaking operation from the inside of the abdominal cavity. After the reserved outer tube (1) and the connecting inner tube (2) are pulled out, the pre-placed drainage tube (3) is left in the abdominal cavity for drainage operation.

2. A drainage catheter reservation device for use in endoscopic surgery according to claim 1, characterized in that: The manual push structure (5) includes: The handle housing (51) is located at the end of the reserved outer tube (1) away from the scalpel (4); The central push rod (52) is movably connected to the inner wall of the handle housing (51); The first connecting rod (53) is located at one end of the central push rod (52) near the skin-breaking knife (4), and is fixedly connected to the inner wall of the connecting inner tube (2), and is also connected to the inner wall of the pre-placed drainage tube (3); A limiting structure (54) is disposed inside the handle housing (51); The outer shell fixing structure (55) is disposed at one end of the handle outer shell (51) near the skin-piercing knife (4); The handheld operating structure (56) is located at the end of the handle shell (51) away from the scalpel (4); The handle shell (51) is fixed to the reserved outer tube (1) by the shell fixing structure (55). By pushing the central push rod (52), the connecting inner tube (2), the pre-placed drainage tube (3) and the puncture knife (4) are pushed to perform the abdominal cavity puncture operation.

3. A drainage catheter reservation device for use in endoscopic surgery according to claim 2, characterized in that: The limiting structure (54) includes: Multiple guide grooves (541) are provided and are equidistantly opened on the inner wall of the handle housing (51); Multiple limit cards (542) are provided, which are equidistantly arranged at one end of the central push rod (52) near the first connecting rod (53) and are connected to the inner wall of the guide groove (541). The positioning card (543) is disposed inside the guide groove (541) and is connected to the limiting card (542). The guide groove (541) and the limiting card (542) work together to enable the central push rod (52) to move along a predetermined trajectory when it is pushed, while the positioning card (543) limits the limiting card (542) to maintain the stability of the central push rod (52).

4. A drainage catheter reservation device for use in endoscopic surgery according to claim 3, characterized in that: The outer casing fixing structure (55) includes: The threaded connection end (551) is located at one end of the handle housing (51) near the scalpel (4), and its inner wall is fitted to the end of the reserved outer tube (1) away from the scalpel (4); A fixed sleeve (552) is threaded to the outer wall of the threaded connection end (551); In this process, by tightening the fixed sleeve (552) at the threaded connection end (551), the threaded connection end (551) clamps and fixes the reserved outer tube (1), thereby fixing the reserved outer tube (1) and the handle shell (51), and at the same time, facilitating disassembly and separation.

5. A drainage catheter reservation device for use in endoscopic surgery according to claim 4, characterized in that: The handheld operating structure (56) includes: Two finger operation rings (561) are provided, respectively located on both sides of the end of the handle shell (51) away from the skin-breaking knife (4); A push ring (562) is located at the end of the central push rod (52) away from the first connecting rod (53); The combination of the finger operation ring (561) and the finger push ring (562) enables medical staff to operate the instrument conveniently and stably.

6. A drainage catheter reservation device for use in endoscopic surgery according to claim 5, characterized in that: The dermabrasion knife (4) includes: A cylindrical rod (41) is fitted to the inner wall of a pre-reserved outer tube (1); The second connecting rod (42) is located at one end of the cylindrical rod (41) near the handle housing (51), and its outer wall is connected to the end of the connecting inner tube (2) away from the handle housing (51). A triangular pyramid (43) is disposed at the end of the cylindrical rod (41) away from the second connecting rod (42); The piercing knife (4) is connected to the connecting inner tube (2) via a cylindrical rod (41). When the central push rod (52) pushes it, the triangular pyramid (43) pierces the abdominal skin tissue.

7. A drainage catheter reservation device for use in endoscopic surgery according to claim 6, characterized in that: The insurance component (6) includes: A positioning hole (61) is provided on one side of the outer wall of the central push rod (52); The arc-shaped plate (62) is fitted to the outer wall of the central push rod (52) and is fitted to the end of the handle shell (51) away from the scalpel (4); The positioning rod (63) is disposed on the inner wall of the arc plate (62) and is connected to the inner wall of the positioning hole (61); The positioning hole (61), the arc plate (62) and the positioning rod (63) work together to fix the central push rod (52) when no surgical operation is performed, which serves as a safety measure. When an abdominal puncture operation is required, the arc plate (62) is removed to release the fixation of the central push rod (52).

8. A drainage catheter reservation device for use in endoscopic surgery according to claim 7, characterized in that: A compression spring (7) is connected to the outer wall of the first connecting rod (53), and the two ends of the compression spring (7) abut against the handle shell (51) and the central push rod (52) respectively.

9. A drainage catheter reservation device for use in endoscopic surgery according to claim 8, characterized in that: The end of the pre-installed drainage tube (3) away from the handle shell (51) is connected to a protective cover (8).

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