Folding anastomat anvil capable of being inserted through puncture

Abstract

The invention relates to the field of anastomosis devices, in particular to a folding anastomat anvil capable of being inserted in a puncture mode. By splitting and folding the nail anvil, the cross section of the device is reduced on the premise of ensuring sufficient strength, width and diameter of the nail anvil, so that on one hand, the device can be put into a body cavity through the operation hole during an endoscopic surgery, and the difficulty of the surgery is reduced; on the other hand, in combination with an anti-stabbing puncture device, on the premise that the internal organs are prevented from being injured, the hollow internal organs needing to be anastomosed can be punctured and placed with the minimum wound, meanwhile, the hollow internal organs with bacteria and other pathogens inside are prevented from being directly communicated with the clean body cavity, and the infection risk is reduced. After anastomosis is completed, the device can be folded again, the nail anvil can be conveniently taken out of the hollow visceral organ, and the anastomotic stoma of the hollow visceral organ is prevented from being damaged.

Description

Technical Field

[0001] The invention relates to the field of anastomotic devices, and more particularly to a foldable anastomotic device anvil capable of being inserted through puncture. Background Art

[0002] Organ anastomosis generally refers to the related technology of connecting two hollow organ segments of the human body together. Against the background of the development of surgical technology towards minimally invasive and rapid surgery, how to perform organ anastomosis safely and easily, especially the organ anastomosis technology under laparoscopy has become the development focus of surgery.

[0003] A circular stapler commonly used for anastomosis is known to generally include a handle assembly, a slender shaft extending from the handle assembly to the distal end, a staple cartridge assembly attached to the distal end of the shaft, and a staple anvil detachable from the aforementioned assembly. In actual surgical operations, the staple anvil needs to be placed inside a hollow organ on one side to assist in completing the stapler's stapling process.

[0004] Due to the requirements for the anastomotic diameter and the rigidity of the anvil, most existing anvils are umbrella-shaped with a hard texture and a large diameter. When the anvil is inserted into a hollow organ, a large opening needs to be made on the surface of the hollow organ, and additional organ damage is easily caused when inserting the anvil and suturing the opening, so a larger skin incision is often required to facilitate the operation. Especially in surgeries on parts such as the esophagus, in order to obtain a larger operating space, it is necessary to increase the diaphragm incision, open the pleural cavity, and other larger traumas, which greatly increases the risk of related complications during and after the operation. Summary of the invention

[0005] Technical issues to be solved In view of the problems existing in the prior art, the purpose of the present invention is to provide a foldable stapler anvil that can be inserted through puncture. By splitting and folding the anvil, the cross-section of the device is reduced while ensuring that the strength and diameter of the anvil are sufficient. On the one hand, it is convenient for the device to be placed into the body cavity through the operating hole during laparoscopic surgery, reducing the difficulty of the operation; on the other hand, combined with the anti-puncture puncture device, the hollow organs to be anastomosed can be inserted through minimal incisions while avoiding damage to the organs, while avoiding direct communication between the hollow organs with bacteria and other pathogens and the clean body cavity, reducing the risk of infection. After the anastomosis is completed, the device can be folded again to facilitate the removal of the anvil from the hollow organ and avoid damaging the anastomotic opening of the hollow organ.

[0006] To solve the above problems, the present invention adopts the following technical solutions: A folding stapler anvil, characterized by comprising: A central rod having a retractable puncture head at one end and an interface at the other end thereof connected to a stapler cartridge shaft in a removable manner; An anvil ring composed of at least two anvil units, with a nail abutment groove on one side of the anvil ring facing the interface; A connecting assembly connecting the center rod and the anvil unit; It is further preferred that the puncture head comprises an outer puncture sheath, an inner puncture-proof core and a puncture head elastic component, wherein the outer puncture sheath is an extension of the central rod, and the end thereof away from the anvil ring is a sharp bevel; The inner stab-proof core is inside the outer puncture sheath, and the outer surface of the inner stab-proof core fits the inner surface of the outer puncture sheath, and can move axially inside the outer puncture sheath; One end of the puncture head elastic component is connected to the inner anti-puncture core, and the other end is connected to the inner wall of the outer puncture sheath, and is axially compressed and stretched inside the outer puncture sheath; More preferably, there is an axial cavity inside the central rod, and the interface is hollow and communicates with the cavity inside the central rod; The inner stab-proof core is closed at one end away from the anvil ring, and has a side hole on the side that communicates with the inner cavity of the center rod; One end of the puncture head elastic component is connected to the inner anti-puncture core, and the other end is connected to the inner wall of the outer puncture sheath, and can be axially compressed and stretched inside the outer puncture sheath; It is further preferred that the internal stab-proof core can rotate inside the external puncture sheath, and when the puncture head elastic component is in a natural state, the side hole can be completely exposed or completely covered by the external puncture sheath; After the elastic component of the puncture head is transformed into a compressed state, the side hole is completely covered by the outer puncture sheath; More preferably, the anvil ring can be radially split into at least two fan-shaped anvil units, and each fan-shaped anvil unit is respectively connected to the connecting assembly; The central rod is provided with a connecting rod slider outside, and the connecting rod slider can move axially outside the central rod; The connecting assembly comprises an anvil connecting rod and a slider connecting rod, each of the anvil units is connected to one end of at least one anvil connecting rod, and the other end of the anvil connecting rod is movably connected to the center rod; one end of the slider connecting rod is movably connected to the middle section of the anvil connecting rod, and the other end of the slider connecting rod is movably connected to the connecting rod slider; More preferably, there is an anvil elastic component on the central rod, one end of which is connected to the connecting rod slider, and the other end is fixedly connected to the outer surface of the central rod; When the anvil elastic component is in a natural state, the connecting rod slider is away from the connection point between the anvil connecting rod and the center rod, and the anvil ring is split into anvil units and folded outside the center rod; When the anvil elastic component is transformed into a compressed state, the connecting rod slider moves toward the connection point between the anvil connecting rod and the central rod, and all the anvil units are combined into a complete anvil ring; It is further preferred that the lengths of the slider connecting rods are different, and the movable connection points of the slider connecting rods and the connecting rod sliders are staggered in the axial direction of the central rod, so that when the anvil elastic component is in a natural state, the anvil unit is folded in a shingle-like manner outside the central rod; More preferably, the outer surface of the central rod has a reamer, and the reamer is located between the puncture head and the anvil ring. Beneficial Effects

[0007] Compared with the prior art, the advantages of the present invention are: By splitting and folding the nail anvil, the cross section of the nail anvil is greatly reduced, so that the device can be placed into the body cavity through the laparoscope operation hole; Under the protection of the puncture-proof device, the folded anvil can be safely inserted into the hollow organ to be anastomosed with minimal incision to avoid causing additional damage. While reducing the cross section of the anvil, it is ensured that the anvil has sufficient strength and diameter during anastomosis; There are a large number of bacteria and other pathogens in some hollow organs. The present invention can avoid directly connecting the inside of the hollow organs with the relatively clean body cavity, thereby reducing the risk of infection. After the anastomosis is completed, the present invention can be restored to a folded state for easy removal, thereby avoiding additional damage to the organs and the anastomotic stoma during the process of removing the stapler; When used for surgeries on the esophagus, rectum, etc., avoid causing additional damage or giving up more favorable surgical procedures in order to obtain sufficient surgical space; When used in esophageal surgery, compared with some existing staplers, the anastomosis of the present invention has an anti-reflux effect, is more in line with the physiological structure, and helps to reduce postoperative reflux symptoms. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic structural diagram of a foldable stapler anvil capable of puncture insertion in an unfolded state provided by an embodiment of the present invention; Figure 2 for Figure 1 The cross-sectional view of the stapler anvil taken along the section line 1A when the stapler anvil is in the expanded state shown; Figure 3 for Figure 1 The schematic diagram of the structure of the stapler anvil when it is in a folded state, viewed from one end of the interface toward the puncture head; Figure 4 for Figure 1 The cross-sectional view of the puncture head shown is taken along the section line 1A when the puncture head elastic component is in a natural state and the side hole is exposed; Figure 5 for Figure 4The puncture head is shown as a cross-sectional view taken along section line 1A when the puncture head elastic component is in a compressed state; Figure 6 for Figure 1 The puncture head is shown as a cross-sectional view taken along section line 1A when the puncture head elastic component is in a natural state and the side hole is covered; Figure 7 for Figure 6 The puncture head shown is a cross-sectional view taken along section line 1A when the puncture head elastic component is in a compressed state.

[0009] Description of the numbers in the figure: 1 center rod, 11 puncture head, 111 inner anti-puncture core, 111a side hole, 112 outer puncture sheath, 113 puncture head elastic component, 12 reamer, 13 connecting rod slider, 14 interface; 2 nail anvil rings, 21 nail anvil units; 3 connecting assembly, 31 nail anvil connecting rod, 32 slider connecting rod, 33 nail anvil elastic assembly. DETAILED DESCRIPTION

[0010] The technical solutions in the embodiments of the present invention are described clearly and completely; obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative work are within the scope of protection of the present invention.

[0011] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", etc., indicating directions or positional relationships, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "one end" and "the other end" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0012] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "having", "connected", "swinging", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Example

[0013] Inspection and preparation process of this embodiment: See also Figures 4 to 7, check that the outer surface of the inner anti-stab core 111 of the nail anvil puncture head 11 is smooth, and it can rotate and move axially inside the outer puncture sheath 112. When the puncture head elastic component 113 is in a natural state, the inner anti-stab core 111 is partially exposed and exceeds the sharp part of the outer puncture sheath 112. Apply axial pressure toward the interface 14 to the inner anti-stab core 111 to compress the puncture head elastic component 113, so that the inner anti-stab core 111 retracts and exposes the sharp part of the outer puncture sheath 112; remove the axial pressure applied to the inner anti-stab core 111, and the puncture head elastic component 113 returns to a natural state, so that the inner anti-stab core 111 is partially exposed and exceeds the sharp part of the outer puncture sheath 112, that is, the retractable anti-stab device works well; Before inserting the nail anvil into the hollow organ, the inner stab-proof core 111 is rotated so that the puncture head elastic component 113 is in a natural state, and the side hole 111a of the inner stab-proof core 111 is completely exposed outside the outer puncture sheath 112, so that the inside and outside of the hollow organ can be communicated during the anastomosis process. In the application scenarios such as inflatable laparoscope, the inside and outside of the hollow organ can be communicated to balance the air pressure on both sides, so as to prevent the hollow organ from being compressed and collapsed and affecting the extension of the nail anvil unit 21; See also Figures 1 to 3 , check that the outer surfaces of all the fan-shaped anvil units 21 are smooth. When the anvil elastic component 33 is in the natural state, the adjacent fan-shaped anvil units 21 are folded outside the anvil center rod 1 in a shingle-like manner. Apply axial pressure toward the puncture head 11 to the connecting rod slider 13, compress the anvil elastic component 33, and make the connecting rod slider 13 move toward the puncture head 11. Compress the anvil elastic component 33, drive the slider connecting rod 32 and the anvil connecting rod 31 to swing relative to the center rod 1, and then drive all the fan-shaped anvil units 21 to expand outward and merge into a complete anvil ring 2; remove the axial pressure applied to the connecting rod slider 13, and the anvil elastic component 33 returns to the natural state, so that the connecting rod slider 13 moves toward the interface 14, and drives all the fan-shaped anvil units 21 to retract and fold in a shingle-like manner on the outer periphery of the anvil center rod 1, that is, the anvil ring 2 has a good folding function; The working process of this embodiment: When all the fan-shaped anvil units 21 are in a folded state, axial pressure is applied with the interface 14 as the fulcrum, and the anvil puncture head 11 is vertically inserted into the center of the expected anastomosis. If necessary, a small incision can be made at the puncture point in advance for easy operation. When the puncture head 11 enters the hollow organ, axial pressure is continued to be applied, and the puncture center rod 1 is slowly rotated at the same time, so that the reamer 12 enlarges the puncture hole to facilitate the placement of the folded fan-shaped anvil unit 21 into the hollow organ to be anastomosed; See also Figures 1 to 3After all the fan-shaped anvil units 21 are completely placed into the cavity organ to be anastomosed, the interface 14 is connected to the stapler magazine shaft rod, and the distance between the fan-shaped anvil unit 21 and the stapler magazine is adjusted to reduce, so that the connecting rod slider 13 is pushed by the stapler magazine to move toward the puncture head 11, and the anvil elastic component 33 is compressed, so that the slider connecting rod 32 and the anvil connecting rod 31 are driven to swing relative to the anvil center rod 1, thereby driving all the fan-shaped anvil units 21 to extend outward, and merge into a complete anvil ring 2 inside the cavity organ, which is used to achieve the nail-stopping effect during anastomosis, and the anastomosis is completed when the distance between the anvil ring 2 and the stapler magazine is appropriate; After the anastomosis is completed, the distance between the anvil ring 2 and the stapler stapler is increased by adjusting, and the connecting rod slider 13 moves toward the interface 14 with the help of the elastic force of the anvil elastic component 33 when it returns to its natural state, driving all the fan-shaped anvil units 21 to retract, and the anvil ring 2 is split and folded again, and the anvil and the excised tissue are taken out together through the completed anastomotic opening. Example

[0014] See also Figures 4 to 7 This embodiment is a further improvement based on the first embodiment. The specific differences between this embodiment and the first embodiment are: During the preparation process before inserting the anvil, the inner anti-stab core 111 is rotated according to actual needs so that the side hole 111a is completely covered by the outer puncture sheath 112. In application scenarios where the cavity organs are seriously contaminated with bacteria, avoiding direct communication between the inside and outside of the cavity organs helps to maintain a relatively clean surgical area.

[0015] The above is only a preferred specific implementation of the present invention; however, the protection scope of the invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A folding stapler anvil, characterized in that: include: A central rod having a retractable puncture head at one end and an interface at the other end thereof connected to a stapler cartridge shaft in a removable manner; An anvil ring composed of at least two anvil units, with a nail abutment groove on one side of the anvil ring facing the interface; A connecting assembly connecting the center rod and the anvil unit.

2. The folding stapler anvil according to claim 1, characterized in that: The puncture head comprises an outer puncture sheath, an inner puncture-proof core and a puncture head elastic component, wherein the outer puncture sheath is an extension of the central rod, and the end thereof away from the anvil ring is a sharp bevel; The inner stab-proof core is inside the outer puncture sheath, and the outer surface of the inner stab-proof core fits the inner surface of the outer puncture sheath, and can move axially inside the outer puncture sheath; One end of the puncture head elastic component is connected to the inner anti-puncture core, and the other end is connected to the inner wall of the outer puncture sheath, and is axially compressed and stretched inside the outer puncture sheath.

3. The folding stapler anvil according to claim 2, characterized in that: There is an axial cavity inside the central rod, and the interface is hollow and communicates with the cavity inside the central rod; The inner stab-proof core is closed at one end away from the anvil ring, and has a side hole on the side that communicates with the inner cavity of the center rod; One end of the puncture head elastic component is connected to the inner anti-puncture core, and the other end is connected to the inner wall of the outer puncture sheath, and can be axially compressed and stretched inside the outer puncture sheath.

4. The folding stapler anvil according to claim 3, characterized in that: The internal puncture-proof core can rotate inside the external puncture sheath, and when the puncture head elastic component is in a natural state, the side hole can be completely exposed or completely covered by the external puncture sheath; After the puncture head elastic component is transformed into a compressed state, the side hole is completely covered by the outer puncture sheath.

5. The folding stapler anvil according to claim 1, characterized in that: The anvil ring can be radially split into at least two fan-shaped anvil units, and each fan-shaped anvil unit is respectively connected to the connecting assembly; The central rod is provided with a connecting rod slider outside, and the connecting rod slider can move axially outside the central rod; The connecting assembly includes an anvil connecting rod and a slider connecting rod, each of the anvil units is connected to one end of at least one anvil connecting rod, and the other end of the anvil connecting rod is movably connected to the center rod; one end of the slider connecting rod is movably connected to the middle section of the anvil connecting rod, and the other end of the slider connecting rod is movably connected to the connecting rod slider.

6. The folding stapler anvil according to claim 5, characterized in that: The center rod has an anvil elastic component, one end of which is connected to the connecting rod slider, and the other end is fixedly connected to the outer surface of the center rod; When the anvil elastic component is in a natural state, the connecting rod slider is away from the connection point between the anvil connecting rod and the center rod, and the anvil ring is split into anvil units and folded outside the center rod; When the anvil elastic component is transformed into a compressed state, the connecting rod slider moves toward the connection point between the anvil connecting rod and the central rod, and all the anvil units are combined into a complete anvil ring.

7. The folding stapler anvil according to claim 6, characterized in that: The slider connecting rods have different lengths, and the movable connection points between the slider connecting rod and the connecting rod slider are staggered in the axial direction of the center rod, so that when the anvil elastic component is in a natural state, the anvil unit is folded in a shingle-like manner outside the center rod.

8. The puncture-insertable folding stapler anvil according to claim 1, characterized in that: The outer surface of the central rod is provided with a reamer, and the reamer is located between the puncture head and the nail anvil ring.

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