Single port laparoscopic fascial closure device for obese patients

Abstract

The application discloses an obese patient single-hole laparoscopic fascia closer and relates to the field of medical devices, which comprises a closing insertion guide rod, the bottom end of the closing insertion guide rod is connected with a positioning and unfolding mechanism for unfolding and positioning on both sides of the inner fascia of the abdominal incision, and the upper part of the closing insertion guide rod is connected with a puncture mechanism for penetrating the fascia. The closer does not need special modification and can be used through a standard single-hole laparoscope sleeve or incision, thereby guaranteeing the universality under different surgical platforms. Meanwhile, the closer has sufficient penetration length and a smart positioning mechanism, can cope with thick abdominal wall and deep fat layer, and ensures that the suture needle accurately penetrates the fascia. In addition, the closer optimizes the suturing process, reduces operation steps as much as possible, and significantly shortens the time required for closing the incision.

Description

Technical Field

[0001] This invention relates to the field of medical devices, specifically a single-port laparoscopic fascia closure device for obese patients. Background Technology

[0002] Single-port laparoscopic bariatric surgery, because it requires a single channel such as the navel to complete the procedure, often results in a larger incision (approximately 2–3 cm) than a conventional laparoscopic puncture port. Post-operatively, the fascia layer must be securely closed to prevent incisional hernia. Obese patients have thick abdominal walls and deep subcutaneous fat layers, making fascial suturing more challenging. Currently used fascial closure devices (such as disposable fascial suturing puncture devices) have revealed several shortcomings in obese patients: Operation time-consuming: It requires puncturing and extracting sutures point by point, which is a complicated process, and closing a single incision often takes several minutes or even longer.

[0003] Limited penetration depth: The standard fascia closure device has a limited needle length, which may not be able to penetrate deep enough under the fascia in patients with particularly thick abdominal walls, resulting in suture failure or the need to enlarge the incision to find the edge of the fascia.

[0004] Inaccurate alignment: Traditional percutaneous suturing often uses the skin surface as a reference. The thicker the abdominal wall, the more extensive the "needle insertion" is required, resulting in excessive suturing of occlusal tissue and asymmetry of the fascia on both sides. This may increase postoperative pain and lead to tissue wrinkling or suture loosening.

[0005] Safety hazards: Some devices require blind insertion of needles inside the abdominal cavity, which poses a risk of accidentally injuring internal organs or pricking medical staff.

[0006] The aforementioned problems not only prolong surgical time but may also increase the incidence of incisional hernias due to poor fascial closure. Therefore, it is imperative to develop a novel fascial closure device specifically designed for single-port surgery in obese patients. Summary of the Invention

[0007] The objective of this invention is achieved through the following technical solution: A single-port laparoscopic fascia closure device for obese patients includes a closure insertion guide rod. The bottom end of the closure insertion guide rod is connected to a positioning and unfolding mechanism for unfolding and positioning on both sides of the medial fascial surface of the abdominal wall incision. The upper part of the closure insertion guide rod is connected to a puncture mechanism for penetrating the fascia. The positioning and deployment mechanism includes symmetrically arranged positioning and deployment wing plates. Both positioning and deployment wing plates are movably connected to the closing insertion guide rod via a movable structure. The closing insertion guide rod is equipped with a push structure for driving the movable structure to move. The puncture mechanism includes a puncture sleeve, which is sleeved on the closed insertion guide rod and used for fixed connection with the closed insertion guide rod. A plurality of puncture needle holes are opened around the puncture sleeve, which are used to install and connect puncture needles. The puncture needles are elastically connected to the puncture needle holes through an elastic structure.

[0008] Preferably, each of the movable structures includes a movable connecting rod and a movable push rod; The bottom end of the movable connecting rod is hinged to the connecting disc at the bottom end of the closed insertion guide rod via a hinge seat. The connecting disc is used to connect to the bottom end of the closed insertion guide rod. The top end of the movable link is hinged to one end face of the positioning and unfolding wing plate via a hinge seat. The upper part of the movable connecting rod is hinged to the bottom end of the movable push rod via a hinge seat, and the top end of the movable push rod is hinged to the pushing structure via a hinge seat.

[0009] Preferably, the movable push rod has a sliding groove on the side near the movable connecting rod, the sliding groove is slidably adapted to a slider, the slider is rotatably hinged to one end of the hinge rod via a pin, and the other end of the hinge rod is hinged to the closing insertion guide rod via a hinge seat.

[0010] Preferably, the pushing structure includes a pushing connecting sleeve and a rotating movable cap; The push connecting sleeve is movably sleeved on the closed insertion guide rod, and the bottom two sides of the push connecting sleeve are respectively used to be hinged to the movable push rod through the hinge seats. The rotating cap is positioned above the push connecting sleeve, and the piercing sleeve is positioned between the rotating cap and the positioning unfolding wing plate. The rotating cap is threadedly and rotatably connected to the closing insertion guide rod.

[0011] Preferably, connecting pieces are provided around the circumference of the rotating movable cap and the pushing connecting sleeve. One end of each connecting piece movably passes through the piercing sleeve and is fixedly connected to the rotating movable cap. The other end of the connecting piece is connected to the pushing connecting sleeve via a bearing. The push connecting sleeve is movably located at the lower part of the puncture sleeve; Rotating the movable cap drives the connecting sleeve to move, which in turn drives the two movable structures to move, thereby enabling the two positioning and unfolding wing plates to unfold and be positioned and supported on both sides of the inner fascial surface of the abdominal wall incision.

[0012] Preferably, the elastic structure includes an elastic spring and a puncture guide sleeve; The elastic spring is elastically sleeved above the puncture guide sleeve, and a connecting head sleeve is connected to the top end of the puncture guide sleeve. The connecting head sleeve is used to slide and adapt to the puncture needle hole. One end of the elastic spring is used to connect with the top inner wall of the puncture needle hole, and the other end of the elastic spring is used to connect with the puncture guide sleeve. The puncture needle is used to be placed in the puncture guide sleeve, and the tip of the puncture needle is used to be threadedly connected to the connector head.

[0013] Preferably, the end of the puncture needle away from the elastic spring is hook-shaped and used to place the suture. The two puncture needles move synchronously, passing through both sides of the medial fascia of the abdominal wall incision, and leaving the sutures on the puncture needles deep to the medial fascia of the abdominal wall incision. The puncture guide sleeve is semi-cylindrical in the middle for suture passage; The bottom of the puncture guide sleeve has a through groove for the suture to pass through.

[0014] Preferably, the sidewalls of the puncture sleeve are hollowed out to allow sutures to pass through; The upper two sides of the puncture guide sleeve are symmetrically connected with arc-shaped receiving plates; The center of the puncture needle hole is connected to the side wall of the puncture sleeve in a hollow cavity. The receiving plate is movably disposed in the puncture needle hole, and the receiving plate is movably disposed in the cavity in which the center of the puncture needle hole is connected to the side wall of the puncture sleeve in a hollow cavity.

[0015] Preferably, an installation disc is movably fitted onto the top outer wall of the puncture sleeve; The mounting disc is elastically connected to the piercing sleeve via a spring. The mounting disc is positioned above the receiving plate, and push blocks are connected to the bottom of the mounting disc around its perimeter. The push blocks are movably positioned in the cavity through which the puncture needle hole is connected to the side wall of the puncture sleeve, and are hinged to the receiving plate. By moving the installation disc downwards, the installation disc causes the bottom push block to move downwards and contact the receiving plate. In turn, the receiving plate drives the puncture needle downwards, allowing it to puncture through the inner fascial side of the abdominal wall incision.

[0016] The beneficial effects of this invention are: the purpose of this invention is to provide a single-port laparoscopic fascia closure device for obese patients, the device being: 1. Compatible with existing cannulas: No special modifications are required. It can be used through standard single-port laparoscopic cannulas or incisions, ensuring versatility across different surgical platforms. 2. Suitable for large abdominal walls: It has sufficient penetration length and a clever positioning mechanism to deal with thick abdominal walls and deep fat layers, ensuring that the suture needles accurately pass through the fascia; 3. Quick and easy: The suturing process is optimized to minimize the number of steps and significantly shorten the time required to close the incision; 4. Single use and compact structure: The overall design is small and the material cost is low. It can be aseptically packaged for single use, which is convenient to use and avoids cross-infection. 5. Safe and reliable: While improving speed, it ensures that the puncture process is safe and controllable for the abdominal organs, avoiding excessive tissue trauma and nerve compression. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the connection structure of the single-port laparoscopic fascia closure device for obese patients according to the present invention; Figure 2 This is an exploded schematic diagram of the connecting structure of the single-port laparoscopic fascia closure device for obese patients according to the present invention. Figure 3 This is a schematic diagram of the positioning and deployment mechanism of the single-port laparoscopic fascia closure device for obese patients of the present invention; Figure 4 This is an exploded schematic diagram of the positioning and unfolding mechanism of the single-port laparoscopic fascia closure device for obese patients of the present invention; Figure 5 This is a schematic diagram of the puncture sleeve connection structure of the single-port laparoscopic fascia closure device for obese patients of the present invention; Figure 6 This is an exploded schematic diagram of the puncture sleeve connection structure of the single-port laparoscopic fascia closure device for obese patients of the present invention. Figure 7 This is a schematic diagram of the elastic structure of the single-port laparoscopic fascia closure device for obese patients according to the present invention; Figure 8 This is an exploded schematic diagram of the elastic structure of the single-port laparoscopic fascia closure device for obese patients according to the present invention; In the diagram, 1-Closed insertion guide rod, 2-Positioning unfolding wing plate, 3-Piercing sleeve, 4-Piercing needle, 21-Modular connecting rod, 22-Modular push rod, 23-Hinged rod, 24-Push connecting sleeve, 25-Rotating movable cap, 26-Connecting piece, 31-Mounting disc, 32-Pushing block, 41-Elastic spring, 42-Piercing guide sleeve, 421-Connecting head sleeve, 422-Receiving plate. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0019] Example 1 like Figures 1 to 8As shown, this is a single-port laparoscopic fascia closure device for obese patients. This device is used in obese patients with thick abdominal walls and deep subcutaneous fat layers. Structurally, the device includes a closure insertion guide rod 1. The bottom end of the guide rod 1 is connected to a positioning and unfolding mechanism for expanding and positioning the device on both sides of the medial fascial surface of the abdominal wall incision. The upper part of the guide rod is connected to a puncture mechanism for penetrating the fascia. By inserting the bottom end of the device into the patient's abdominal wall incision, the positioning and unfolding mechanism is controlled to expand and position the device on both sides of the medial fascial surface of the incision. Subsequently, the puncture mechanism is controlled to simultaneously pass through both sides of the medial fascial surface of the incision, delivering sutures to the medial side of the incision. Deep to the fascia on both sides, the ends of two sutures are fitted with absorbable anchors. When the puncture mechanism withdraws from the medial fascia of the abdominal wall incision, the sutures and their anchors remain deep to the fascia on both sides. The positioning and unfolding mechanism is then reset to its initial state, and the closure device is removed from the abdominal wall incision. Simultaneously, the other ends of the two sutures on the puncture mechanism fall from the bottom of the closure device. The "knots" of the two sutures are then connected to pull them together, thus suturing the medial fascia of the abdominal wall incision. Each suture end is pre-installed with an absorbable anchor. When the double needles (puncture needles) penetrate the fascia, the anchors are pushed and placed deep to the fascia, one anchor per side. The anchors, connected by absorbable sutures, pull the two sides of the fascia together to close them. The anchoring clip is designed as a small, barbed or "T"-shaped piece, placed in the cavity within the hook of the puncture needle 4. When the puncture needle 4 enters the abdominal cavity, as the suture detaches from the needle, the anchoring clip remains deep within the fascia along with the suture. It expands upon contact with moisture, securing one end of the suture to the deep fascia without the need for knotting. The anchoring material is a biodegradable polymer (such as PDO or PLLA), absorbed within 6-9 months. Anchoring closure avoids the need for external "fishing" to find the end of the suture, making it quick and safe. Studies show that anchoring closure is faster and less painful than traditional ligation methods.

[0020] Furthermore, the positioning and deployment mechanism includes symmetrically arranged positioning and deployment wing plates 2. Both positioning and deployment wing plates 2 are movably connected to the closing insertion guide rod 1 through a movable structure. A pushing structure for driving the movable structure is installed on the closing insertion guide rod 1. The puncture mechanism includes a puncture sleeve 3, which is sleeved on the closing insertion guide rod 1 and used for fixed connection with the closing insertion guide rod 1. Several puncture needle holes are opened around the puncture sleeve 3. The puncture needle holes are used to install and connect puncture needles 4. The puncture needles 4 are elastically connected to the puncture needle holes through an elastic structure.

[0021] In this embodiment, by controlling the deployment of the positioning and unfolding wing plates 2 of the positioning and unfolding mechanism, the two positioning and unfolding wing plates 2 are positioned on both sides of the inner fascial surface of the abdominal wall incision. Then, by controlling the puncture needles 4 symmetrically installed on the puncture sleeve 3 to move downward "synchronously" and pass through both sides of the inner fascial surface of the abdominal wall incision, the sutures on the puncture needles 4 are inserted and placed deep on both sides of the inner fascial surface of the abdominal wall incision. Then, the positioning and unfolding wing plates 2 of the positioning and unfolding mechanism of the closure device are reset to the initial state, and the closure device is removed from the abdominal wall incision. At the same time, the other ends of the two sutures set on the puncture mechanism fall from the bottom of the closure device. Then, the "knots" of the two sutures are connected, and the two sutures are pulled together to suture both sides of the inner fascial surface of the abdominal wall incision.

[0022] Meanwhile, the positioning and unfolding wing plate 2 serves as a positioning wing for the abdominal incision. The front end of the closure device is equipped with an unfoldable "wing-shaped" positioning and unfolding wing plate 2. In use, the closure device is inserted into the abdominal cavity through the surgical incision, and the positioning and unfolding wing plate 2 is unfolded to rest against the side wall surface of the fascia on the inner side of the abdominal wall. The positioning and unfolding wing plate 2 acts as an inner reference surface, lifting and flattening the fascia tissue, and providing a support surface for the puncture needle 4 (or suture needle) to exit. This "fascia-referenced" positioning method ensures that the needle insertion distance from the incision edge remains constant (approximately 1 cm) regardless of the thickness of the abdominal wall, forming a symmetrical tissue occlusion. At the same time, the positioning and unfolding wing plate 2 prevents the front end of the device from wobbling after opening, achieving stable support and alignment for the thick abdominal wall. The positioning and unfolding wing plate 2 is made of tough engineering plastic (such as polycarbonate PC) or a stainless steel frame, ensuring sufficient strength to support the fascia while also having a certain degree of elasticity for easy unfolding and folding.

[0023] Example 2 Based on Example 1, such as Figure 3 , Figure 4 As shown, the movable structure of this setup includes a movable connecting rod 21 and a movable push rod 22. The bottom end of the movable connecting rod 21 is hinged to the connecting disc at the bottom of the closing insertion guide rod 1 via a hinge seat, and the connecting disc is connected to the bottom end of the closing insertion guide rod 1. The top end of the movable connecting rod 21 is hinged to one end face of the positioning and unfolding wing plate 2 via a hinge seat. The upper part of the movable connecting rod 21 is hinged to the bottom end of the movable push rod 22 via a hinge seat, and the top end of the movable push rod 22 is hinged to the pushing structure via a hinge seat. A sliding groove is provided on the side of the movable push rod 22 near the movable connecting rod 21. A slider is slidably fitted into the sliding groove. The slider is hinged to one end of the hinge rod 23 via a pin, and the other end of the hinge rod is hinged to the closing insertion guide rod 1 via a hinge seat.

[0024] Furthermore, such as Figure 5 , Figure 6As shown, the pushing structure includes a pushing connecting sleeve 24 and a rotating movable cap 25; the pushing connecting sleeve 24 is movably sleeved on the closing insertion guide rod 1, and the bottom ends of the pushing connecting sleeve 24 are respectively hinged to the movable push rod 22 through hinge seats; the rotating movable cap 25 is disposed above the pushing connecting sleeve 24 and the piercing sleeve 3 is disposed between the rotating movable cap 25 and the positioning unfolding wing plate 2, and the rotating movable cap 25 is threadedly rotated and adjusted to the closing insertion guide rod 1.

[0025] Furthermore, connecting pieces 26 are respectively provided around the rotating cap 25 and the push connecting sleeve 24. One end of the connecting piece 26 passes through the puncture sleeve 3 and is fixedly connected to the rotating cap 25. The other end of the connecting piece 26 is rotatably connected to the push connecting sleeve 24 through a bearing. The push connecting sleeve 24 is movably located at the lower part of the puncture sleeve 3. By rotating the rotating cap 25, the push connecting sleeve 24 is moved. By pushing the connecting sleeve 24, the two movable structures are moved, thereby enabling the two positioning and unfolding wing plates 2 to unfold and be positioned and supported on both sides of the inner fascial surface of the abdominal wall incision.

[0026] In this embodiment, after the closure device, which has a positioning and unfolding mechanism at its bottom, is inserted into the abdominal incision, the rotating cap 25 is rotated, causing it to move downward relative to the closure insertion guide rod 1. The rotating cap 25 drives the connecting piece 26, which is rotatably connected to the rotating cap 25 via a bearing, to move the pushing connecting sleeve 24 downward (relative to the closure insertion guide rod 1). This, in turn, moves the two movable push rods 22 hinged to both sides of the bottom end of the pushing connecting sleeve 24. Since the other side of the two movable push rods 22 is connected to the closure insertion guide rod 23 via a hinge rod 23... The guide rod 1 is inclined and hinged on the side near the connecting disc. Under the "sliding limit guidance" of the hinge rod 23, the movable push rod 22 moves outward toward the outside of the closed insertion guide rod 1, thereby driving the movable push rod 22, which is hinged to the closed insertion guide rod 1, to move outward toward the outside of the closed insertion guide rod 1. This causes the two positioning and unfolding wing plates 2 to move outward toward the outside of the closed insertion guide rod 1, that is, toward the two sides of the inner fascial surface of the abdominal wall incision. Through the unfolding support of the positioning and unfolding wing plates 2, the two sides of the inner fascial surface of the abdominal wall incision are positioned and supported. Furthermore, by rotating the rotating movable cap 25 downward, the degree of unfolding of the positioning and unfolding wing plates 2 can be adjusted, thereby adjusting and controlling the "opening width" of the two sides of the inner fascial surface of the abdominal wall incision. This allows for appropriate adjustment of the inner reference surface of the incision at the suture position, thus facilitating the suturing process.

[0027] Example 3 Furthermore, such as Figure 7 , Figure 8As shown, the elastic structure of this setup includes an elastic spring 41 and a puncture guide sleeve 42. The elastic spring 41 is elastically sleeved above the puncture guide sleeve 42, and a connecting head sleeve 421 is connected to the top end of the puncture guide sleeve 42. The connecting head sleeve 421 is used to slide and adapt to the puncture needle hole (opened by the puncture sleeve 3). One end of the elastic spring 41 is used to connect to the top inner wall of the puncture needle hole, and the other end of the elastic spring 41 is used to connect to the puncture guide sleeve 42. The puncture needle 4 is used to be set in the puncture guide sleeve 42, and the top end of the puncture needle 4 is used to be threadedly connected to the connecting head sleeve 421.

[0028] In this embodiment, the connecting head sleeve 421 is installed and connected to the upper part of the puncture needle in the puncture sleeve 3; the connecting head sleeve 421, which is threaded through the puncture guide sleeve 42 and connected to the top end of the puncture guide sleeve 42, is threadedly connected to the puncture needle 3. The threaded connection between the puncture needle 3 and the connecting head sleeve 421 facilitates the replacement of puncture needles 3 of different sizes to adapt to different environmental requirements. Furthermore, one end of the elastic spring 41 is connected to the top inner wall of the puncture needle hole, and the other end of the elastic spring 41 is connected to the puncture guide sleeve 42. This allows the puncture guide sleeve 42 to be elastically and movably installed in the puncture needle hole in the puncture sleeve 3, facilitating the puncture guide sleeve 42 to move and reset the puncture needle 3 and providing elastic protection.

[0029] Example 4 Furthermore, the end of the puncture needle 4 furthest from the elastic spring 41 is hook-shaped for placing sutures; the two puncture needles 4 move synchronously, passing through both sides of the inner fascia of the abdominal wall incision, and leaving the sutures on the puncture needles 4 deep to the inner fascia side of the abdominal wall incision; the middle part of the puncture guide sleeve 42 is semi-cylindrical for sutures to pass through; the bottom of the puncture guide sleeve 42 has a through groove for sutures to pass through.

[0030] Meanwhile, the sidewall of the puncture sleeve 42 is hollowed out to allow sutures to pass through; the upper two sides of the puncture guide sleeve 42 are symmetrically connected with arc-shaped receiving plates 422; the middle of the puncture needle hole is connected to the hollowed-out cavity of the sidewall of the puncture sleeve 3, and the receiving plate 422 is movably disposed in the puncture needle hole, and the receiving plate 422 is movably disposed in the cavity of the hollowed-out cavity of the middle of the puncture needle hole and the sidewall of the puncture sleeve.

[0031] In this embodiment, by moving the receiving plate 422 downward relative to the cavity through which the middle of the puncture needle hole and the side wall of the puncture sleeve are hollowed out, the puncture sleeve 42 is moved downward; thereby, the end of the puncture needle 4, which is limited and placed with a gap, is punctured through both sides of the inner fascial surface of the abdominal wall incision; when the "pressure end" of the receiving plate 422 is released, the receiving plate 422 is elastically reset by the elastic spring 41, and under the action of "returning to the initial state" from the outside, the puncture sleeve 3 is moved back to the initial position in the puncture needle hole.

[0032] It is worth noting that the closure device features a dual-channel puncture needle: two sets of opposing pop-out suture needles are built into the device body, pointing towards the fascia on both sides of the incision along the sides of the positioning and unfolding wing plate 2. Upon activation, the two suture needles pop out synchronously, penetrating both sides of the fascial defect simultaneously, each carrying a suture end or suture guide device. This symmetrical dual-needle synchronous puncture mechanism ensures that the left and right fascia are simultaneously engaged, greatly reducing repetitive operations; it also avoids the problem of uneven needle hole heights during traditional side-by-side punctures, resulting in uniform and symmetrical suture tension. The needle tip adopts a hook-shaped design, automatically carrying the suture through the fascia and flicking / joining the suture within the needle chamber. The puncture needle 4 is driven by a spring-driven puncture sleeve 42, which is designed with a protective baffle to shield the needle tip before and after puncture, preventing accidental tissue damage. The needle tip and drive rod are made of medical-grade stainless steel to provide sufficient rigidity and sharpness; the needle diameter is approximately 2.5 mm, allowing penetration of thick fascial tissue without enlarging the incision.

[0033] Example 5 Furthermore, the top outer wall of the puncture sleeve 3 is movably fitted with an installation disc 31; the installation disc 31 is elastically connected to the puncture sleeve 3 via a spring; and the two sides of the installation disc 31 are respectively provided with pressing ears for easy manual pressing; the installation disc 31 is positioned above the receiving plate 422, and the bottom of the installation disc 31 is connected to push blocks 32 around its perimeter. The push blocks 32 are movably positioned in the cavity in the middle of the puncture needle hole, which is connected to the hollow cavity around the side wall of the puncture sleeve 3, and are hinged to the receiving plate 422; by driving the installation disc 31 to move downward, the installation disc 31 drives the push blocks 32 at its bottom to move downward and contact the receiving plate, thereby driving the puncture needle 4 to move downward through the receiving plate 422, puncturing through the inner fascial side of the abdominal wall incision.

[0034] In this embodiment, one hand stabilizes the closing insertion guide rod 1 of the closure device, while the other hand presses down on the mounting disc 31. The downward movement of the mounting disc 31 causes the receiving plate 422, hinged to the push block 32 at the bottom of the mounting disc 31, to move downward relative to the cavity that is movably disposed in the middle of the puncture needle hole and permeates the side wall of the puncture sleeve 3, forming a hollow cavity. This downward movement is relative to the closing insertion guide rod 1, thereby causing the two puncture needles 4 to move synchronously downward under the influence of the mounting disc 31, puncturing through both sides of the inner fascial surface of the abdominal wall incision. When the mounting disc 31 is released and a certain upward "pulling force" is applied, the mounting disc 31 and... The two puncture needles 4 are retracted to their initial positions. During this retraction, the friction between the suture and the fascia puncture site causes the needle to retract, while the end of the suture with the anchor buckle remains deep within the fascia. This anchor buckle expands when wet, acting as an anchor point deep within the fascia. Then, by rotating the rotating cap 25, the positioning and unfolding wing plate 2 is retracted until it returns to its initial position. The closure device is then removed from the abdominal wall incision, and the other ends of the two sutures are removed from the closure device. The "knots" of the two sutures are then connected, and the two sutures are pulled together to suture the inner fascial surface of the abdominal wall incision. After the closure device is removed, the skin incision is examined. The needle holes on both sides are small and symmetrical, with no obvious "notches" or uneven tissue depressions (due to the uniform and symmetrical occlusion, excessive traction on one side of the tissue is avoided).

[0035] Throughout the embodiment, the closure: Main shell: Injection molded from medical-grade polycarbonate (PC) or ABS plastic. These materials offer high mechanical strength and impact resistance, capable of withstanding the forces exerted by the deploying wings and spring mechanism. Plastic parts are easily processed into complex shapes and can be integrated with snap-fit ​​mechanisms, guide rails, and other structures, resulting in a lightweight and low-cost instrument. While meeting strength requirements, the shell has a matte, non-slip surface for easy operator control.

[0036] Puncture needle and transmission components: Made of stainless steel alloy (such as 06Cr19Ni10, corresponding to medical-grade 304 stainless steel). The stainless steel needle possesses sufficient sharpness and rigidity to penetrate thick fascia multiple times without bending or dulling. The needle tip is precision ground and siliconized to reduce puncture resistance and tissue damage. The transmission rod, spring, etc., are also made of stainless steel to ensure ejection rebound accuracy and durability. Key riveting and sliding parts can use self-lubricating engineering plastic bushings such as PEEK to reduce metal-to-metal friction and achieve smooth operation.

[0037] Sutures and Anchors: Sutures can be made of absorbable synthetic materials (such as PDO, Vicryl, etc.), configured according to clinical preference. Barbed sutures are preferred; using barbed sutures such as V-Loc can increase self-locking ability and further reduce ligation steps. Anchor buckles are made of absorbable polymers (such as PLGA copolymers) and are moisture-swellable, ensuring initial strength while gradually degrading postoperatively, eliminating the need for secondary removal. The nodules in the sliding knot pusher can be made of titanium clips (such as LSI's Ti-Knot titanium clips) or absorbable locking clips to provide reliable mechanical locking in a small volume.

[0038] Wings and Outer Tube: The positioning wings should be made of elastic metal sheets or composite fiber-reinforced plastic, requiring them to withstand repeated unfolding and retraction without breaking and to possess a certain degree of elastic deformation. The outer tube, serving as the positioning scale and needle guide, should ideally be lined with low-friction engineering plastic, with clearly engraved depth markings and direction indicators (e.g., markings corresponding to the direction of the positioning wings) on its surface. Furthermore, a silicone skin pad can be provided at the end of the outer tube to distribute pressure, increase stability, and prevent slippage when the instrument is in contact with the skin.

Claims

1. A single-port laparoscopic fascia closure device for obese patients, comprising a closure insertion guide rod, characterized in that, The bottom end of the closed insertion guide rod is equipped with a positioning and unfolding mechanism for unfolding and positioning on both sides of the inner fascial surface of the abdominal wall incision, and the upper part of the closed insertion guide rod is equipped with a puncture mechanism for penetrating the fascia. The positioning and deployment mechanism includes symmetrically arranged positioning and deployment wing plates. Both positioning and deployment wing plates are movably connected to the closing insertion guide rod via a movable structure. The closing insertion guide rod is equipped with a push structure for driving the movable structure to move. The puncture mechanism includes a puncture sleeve, which is sleeved on the closed insertion guide rod and used to be fixedly connected to the closed insertion guide rod. A plurality of puncture needle holes are opened around the puncture sleeve, which are used to install and connect puncture needles. The puncture needles are elastically connected to the puncture needle holes through an elastic structure. The elastic structures all include elastic springs and puncture guide sleeves; The elastic spring is elastically sleeved above the puncture guide sleeve, and a connecting head sleeve is connected to the top end of the puncture guide sleeve. The connecting head sleeve is used to slide and adapt to the puncture needle hole. One end of the elastic spring is used to connect with the top inner wall of the puncture needle hole, and the other end of the elastic spring is used to connect with the puncture guide sleeve. The puncture needle is used to be placed in the puncture guide sleeve, and the tip of the puncture needle is used to be threadedly connected to the connector head.

2. The single-port laparoscopic fascia closure device for obese patients according to claim 1, characterized in that, The movable structures all include movable connecting rods and movable push rods; The bottom end of the movable connecting rod is hinged to the connecting disc at the bottom end of the closed insertion guide rod via a hinge seat. The connecting disc is used to connect to the bottom end of the closed insertion guide rod. The top end of the movable link is hinged to one end face of the positioning and unfolding wing plate via a hinge seat. The upper part of the movable connecting rod is hinged to the bottom end of the movable push rod via a hinge seat, and the top end of the movable push rod is hinged to the pushing structure via a hinge seat.

3. The single-port laparoscopic fascia closure device for obese patients according to claim 2, characterized in that, The movable push rod has a sliding groove on the side near the movable connecting rod. The sliding groove is slidably adapted to a slider. The slider is rotatably hinged to one end of the hinge rod via a pin. The other end of the hinge rod is hinged to the closing insertion guide rod via a hinge seat.

4. The single-port laparoscopic fascia closure device for obese patients according to claim 3, characterized in that, The pushing structure includes a pushing connecting sleeve and a rotating movable cap; The push connecting sleeve is movably sleeved on the closed insertion guide rod, and the bottom two sides of the push connecting sleeve are respectively used to be hinged to the movable push rod through the hinge seats. The rotating cap is positioned above the push connecting sleeve, and the piercing sleeve is positioned between the rotating cap and the positioning unfolding wing plate. The rotating cap is threadedly and rotatably connected to the closing insertion guide rod.

5. The single-port laparoscopic fascia closure device for obese patients according to claim 4, characterized in that, Connecting pieces are provided around the circumference of the rotating cap and the pushing connecting sleeve. One end of each connecting piece passes through the piercing sleeve and is fixedly connected to the rotating cap. The other end of the connecting piece is connected to the pushing connecting sleeve via a bearing. The push connecting sleeve is movably located at the lower part of the puncture sleeve; Rotating the movable cap drives the connecting sleeve to move, which in turn drives the two movable structures to move, thereby enabling the two positioning and unfolding wing plates to unfold and be positioned and supported on both sides of the inner fascial surface of the abdominal wall incision.

6. The single-port laparoscopic fascia closure device for obese patients according to claim 1, characterized in that, The end of the puncture needle away from the elastic spring is hook-shaped and used to hold the suture. The two puncture needles move synchronously, passing through both sides of the medial fascia of the abdominal wall incision, and leaving the sutures on the puncture needles deep to the medial fascia of the abdominal wall incision. The puncture guide sleeve is semi-cylindrical in the middle for suture passage; The bottom of the puncture guide sleeve has a through groove for the suture to pass through.

7. The single-port laparoscopic fascia closure device for obese patients according to claim 6, characterized in that, The sidewalls of the puncture sleeve are hollowed out to allow sutures to pass through; The upper two sides of the puncture guide sleeve are symmetrically connected with arc-shaped receiving plates; The center of the puncture needle hole is connected to the side wall of the puncture sleeve in a hollow cavity. The receiving plate is movably disposed in the puncture needle hole, and the receiving plate is movably disposed in the cavity in which the center of the puncture needle hole is connected to the side wall of the puncture sleeve in a hollow cavity.

8. The single-port laparoscopic fascia closure device for obese patients according to claim 7, characterized in that, The top outer wall of the puncture sleeve is movably fitted with an installation disc; The mounting disc is elastically connected to the piercing sleeve via a spring; The mounting disc is positioned above the receiving plate, and push blocks are connected to the bottom of the mounting disc around its perimeter. The push blocks are movably positioned in the cavity through which the puncture needle hole is connected to the side wall of the puncture sleeve, and are hinged to the receiving plate. By moving the installation disc downwards, the installation disc causes the bottom push block to move downwards and contact the receiving plate. In turn, the receiving plate drives the puncture needle downwards, allowing it to puncture through the lateral fascial surface of the abdominal wall incision.

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