CN217611219U - Cavity tube adjusting instrument - Google Patents

Abstract

The application provides a cavity tube adjusting instrument which mainly comprises a body, a first surrounding part and a second surrounding part, wherein the first surrounding part and the second surrounding part are movably connected with the body; at least one of the first surrounding part and the second surrounding part is provided with a locking structure, the first surrounding part and the second surrounding part can be combined with each other to form a surrounding part which circumferentially surrounds the target cavity tube, and the first surrounding part and the second surrounding part can synchronously reciprocate relative to the body to adjust the section area of the surrounding part and enable the cross section of the target cavity tube to generate deformation in different degrees according to different section areas of the surrounding part. In view of the above, this application can conveniently and accurately regulate and control the liquid velocity of flow in the target lumen to have the advantage that the operation stroke is short.

Description

Cavity tube adjusting instrument

Technical Field

The embodiment of the application relates to the technical field of medical instruments, in particular to a lumen tube adjusting instrument.

Background

During surgery on parenchymal organs with abundant blood vessels, intraoperative hemorrhage control is often the key to success or failure of surgery: on one hand, excessive bleeding is often the main cause of serious complications; on the other hand, a long-term blood flow blockage or ischemia reperfusion process also causes severe damage to organs. Both conditions may lead to death of the patient. Bleeding control is also a key technology point limiting the development of surgical techniques.

Therefore, as surgical minimally invasive procedures have evolved, laparoscopic hepatectomy places higher demands on bleeding control techniques for the procedure.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present application provides a lumen adjusting instrument to overcome or at least partially solve the above problems.

Embodiments of the present application provide a lumen adjusting instrument, comprising: a body; the first surrounding part and the second surrounding part are respectively movably connected with the body; a locking structure; wherein at least one of the first surrounding part and the second surrounding part is provided with the locking structure, and the first surrounding part and the second surrounding part can be combined with each other to form a surrounding part which circumferentially surrounds the target cavity tube; the first and second encircling members are synchronously movable back and forth relative to the body to adjust the cross-sectional area of the encircling portion and to deform the cross-section of the target lumen to different degrees depending on the different cross-sectional areas of the encircling portion.

Optionally, the body is a hollow structure and has a distal end; the first and second surrounds are axially movable in unison in a first direction relative to the body such that a portion of each of the first and second surrounds moves from inside the body to outside the body via the distal end such that a cross-sectional area of the surround circumferentially surrounding the target lumen increases; alternatively, the first and second surrounds may be synchronously movable axially relative to the body in a second direction opposite the first direction to cause a portion of each of the first and second surrounds to enter the interior of the body from the exterior of the body via the distal end such that a cross-sectional area of the surround circumferentially surrounding the target lumen is reduced.

Optionally, the first and second surrounds are each made of a flexible material comprising at least one of silicone, latex, resin, polyester, polyurethane; the first surrounding member and the second surrounding member each include a hollow structure or a solid structure, and a cross section of each of the first surrounding member and the second surrounding member includes at least one of a circle, an ellipse, and a rectangle.

Optionally, the locking structure comprises a through-going structure; one of the first surrounding part and the second surrounding part is provided with the penetrating structure so as to be movably penetrated and arranged in the other one of the first surrounding part and the second surrounding part; and the penetrating structure can be deformed under the action of external force so as to position the first surrounding piece or the second surrounding piece movably penetrating through the penetrating structure.

Optionally, the piercing structure may comprise a crimp tube; or the penetrating structure may include a penetrating ring having one of a circular cross-section, a non-circular cross-section, a rectangular cross-section, and a polygonal cross-section.

Optionally, the locking structure includes a first locking unit and a second locking unit respectively disposed on the first surrounding member and the second surrounding member.

Optionally, the first locking unit includes a first positioning portion, and the second locking unit includes a first penetrating portion and a locking portion that are communicated with each other; the first surrounding part or the second surrounding part provided with the first positioning part can be movably arranged in the first penetrating part in a penetrating way and can enter the locking part from the first penetrating part, so that the first positioning part is abutted against one side or two opposite sides of the locking part, and the first surrounding part and the second surrounding part form the surrounding part.

Optionally, the first locking unit includes a second positioning portion, and the second locking unit includes a second penetrating portion switchable between a positioning state and a non-positioning state; when the second penetrating part is in the non-positioning state, the first surrounding part or the second surrounding part provided with the second positioning part can penetrate through the second penetrating part; when the second penetrating part is in the positioning state, the second positioning part can be abutted against one side or two opposite sides of the second penetrating part, so that the first surrounding part and the second surrounding part form the surrounding part.

Optionally, the second locking unit further includes a penetrating passage communicating with the second penetrating portion, so that the first surrounding member or the second surrounding member provided with the second positioning portion enters or exits from the second penetrating portion through the penetrating passage.

Optionally, the first positioning portion or the second positioning portion includes at least one positioning protrusion distributed on the first surrounding part or the second surrounding part, so that the first surrounding part and the second surrounding part form the surrounding parts with different cross-sectional areas; the locating boss may comprise a circular cross-section, a rectangular cross-section or a tapered cross-section.

Optionally, the first surrounding member or the second surrounding member provided with the second locking unit further includes an operating portion adjacent to the second locking unit, and the second locking unit can be positioned by the operating portion for combining the first surrounding member or the second surrounding member provided with the first locking unit.

Optionally, the locking structure comprises a strap structure provided on the first and second surround respectively.

Optionally, the end of the first and/or second surround further comprises a piercing structure for providing the second surround to pass through a target tissue space to reach a predetermined tissue location.

Optionally, the apparatus further comprises an identification unit provided on at least one of the body, the first surrounding member and the second surrounding member for identifying a moving distance of the first surrounding member and the second surrounding member relative to the body.

Optionally, the instrument further comprises a combination located in the body and connecting the first and second surrounds, respectively; and wherein the instrument further comprises a drive structure positioned at the proximal end of the body and connected to the assembly for controlling axial movement of the assembly relative to the body to move the first and second surrounds synchronously relative to the body.

In summary, the lumen adjusting instrument of the present embodiment controls the first surrounding member and the second surrounding member to reciprocate relatively to the body, so as to not only precisely and rapidly adjust the cross-sectional area of the surrounding portion, thereby achieving the purpose of precisely controlling the flow rate of the liquid in the target lumen, but also has the advantages of short operation stroke, high closing efficiency and small instrument volume.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the embodiments of the present application, and other drawings can be obtained by those skilled in the art according to the drawings.

Fig. 1 to 3 are schematic diagrams showing the overall structure of various embodiments of the lumen adjusting instrument according to the present application.

FIGS. 4-14 are schematic partial structural views of various embodiments of a lumen adjustment instrument according to the present application.

FIG. 15 is a schematic diagram of an embodiment of a lumen adjustment instrument according to the present application.

FIG. 16 is a schematic view of a portion of another embodiment of a lumen adjustment instrument according to the present application.

Element number

1: a lumen conditioning instrument;

2: a target lumen;

10: a body;

12: a distal end;

14: a proximal end;

20: a first surround;

30: a second surrounding member;

40: a locking structure;

42: a penetrating structure;

44: pressing the pipes;

46: a ring is arranged in a penetrating way;

48: a first locking unit;

482: a first positioning portion;

484: a second positioning portion;

50: a second locking unit;

502: a first penetration portion;

504: a locking portion;

506: a second penetration portion;

5062 elastic stopping unit;

508: a channel is arranged in a penetrating way;

510: a band structure;

62: a positioning projection;

64: an operation unit;

642: an anti-slip unit;

66: a puncture structure;

68: an identification unit;

70: an assembly;

72: a drive structure;

74: a bending control part;

76: and (3) an elastic structure.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application shall fall within the scope of the protection of the embodiments in the present application.

During surgery on parenchymal organs with abundant blood vessels (such as liver, kidney, spleen), intraoperative hemorrhage control is often the key to success or failure of surgery: on one hand, excessive bleeding is often the main cause of serious complications; on the other hand, prolonged blood flow interruption or ischemia-reperfusion also leads to severe damage to the organs. Both conditions may lead to death of the patient. Bleeding control is also a key technology point limiting the development of surgical techniques. In the present day, in which minimally invasive surgery accounts for an ever-increasing proportion, more demands are also being placed on bleeding control techniques.

The modern liver surgery has been developed by minimally invasive operations such as laparoscopy, but the conventional blood vessel blocking technology can not play a role due to the limitation of operation environment, technology, instruments and the like when being directly applied to the laparoscopic environment, so that the safety of laparoscopic liver resection with treatment advantages cannot be sufficiently technically guaranteed like an open surgery.

Particularly for bleeding control of complicated hepatectomy operations close to large blood vessels, special parts and the like, hemostasis cannot be controlled even by a high-frequency electrosurgery operation workstation (an energy platform), an ultrasonic knife, a Ligasure blood vessel closer and the like, and the traditional technology for controlling and controlling the controlled release of hepatic blood vessel bundling is still an indispensable basic technical guarantee that the operations can be smoothly carried out. Thus, the use of laparoscopic hepatectomy and new surgical instruments does not reduce the reliance on traditional hemorrhage control techniques.

Summary of the research aiming at the blood vessel blocking technology under laparoscopic surgery, clamping and surrounding the blood vessel are the main methods for blocking the blood vessel to control bleeding.

The chinese utility model patent No. 212939836U proposes a technical scheme for blocking blood vessels by using a forceps holder method, however, the scheme still has the following problems: for a thicker vessel in the abdominal cavity, the operation of clamping the vessel to control the blood flow may be difficult to cover the circumference of the vessel, and the purpose of effectively controlling the blood flow may not be achieved; the head of the forceps holder has insufficient curvature, so that the forceps holder cannot clamp a special target blood vessel, and the curvature is too large, so that the forceps holder cannot pass through an operation hole of the endoscope, and the application of the forceps holder under the endoscope is limited.

The utility model discloses a chinese utility model patent No. 210631257U provides an adopt single surrounding area to wrap around the blood vessel and carry out the technical scheme that blocks, and the technical problem that this scheme exists includes: the stroke is great after tightening up, and the apparatus is bulky, occupies laparoscopic surgery's space to the closed loop node that forms after the parcel is unchangeable, the doctor can not solve the blood vessel through adjusting the closed point and wraps up not enough or the problem of tension, causes the inconvenience for the operation.

Therefore, how to provide a new blood flow control technology can change the traditional mode of ' blocking first and then operating ' into ' blocking first and then according to needs ', can change ' blocking blood vessels which are difficult to adjust in time ' into ' blocking blood vessels which can be controlled and controlled in real time ', and change ' blocking operation which is completed by multiple persons in cooperation ' into ' can be completed by one person, thereby reducing the labor cost, ensuring the safety of a patient in the perioperative period, reducing the risk of the operation, reducing the technical requirements of the operation of the operator, facilitating the blocking operation of the operator in the laparoscopic environment, and the like, and becoming a problem to be solved urgently.

The following further describes specific implementations of the embodiments of the present application with reference to the drawings of the embodiments of the present application.

As shown in fig. 1 to 3, the lumen adjusting instrument 1 of the present application mainly includes a body 10, a first surrounding member 20, a second surrounding member 30, and a locking structure 40.

At least one of the first and second surrounding members 20, 30 may be provided with a locking structure 40 for engaging the first and second surrounding members 20, 30 with each other to form a surrounding portion 50 (see fig. 4 and 5) circumferentially surrounding the target lumen 2.

For example, in the embodiment shown in fig. 4, the locking structure 40 may be provided only on the second surrounding member 30, in the embodiment shown in fig. 5, the locking structure 40 may be provided on both the first surrounding member 20 and the second surrounding member 30, and in the embodiment shown in fig. 6, the locking structure 40 may be provided only on the first surrounding member 20.

Alternatively, the target lumen 2 may be a deformable lumen having an internal lumen, including but not limited to, various biological tissue lumens such as blood vessels, bile ducts, lymphatic vessels, trachea, ureters, lumens of the digestive system, and the like.

In this embodiment, the first and second surrounding members 20 and 30 are reciprocally moved synchronously with respect to the body 10 to adjust the cross-sectional area of the surrounding portion 50 and to allow the cross-section of the target lumen 2 to be deformed to different degrees according to different cross-sectional areas of the surrounding portion 50.

Specifically, as the cross-sectional area of the surrounding portion 50 circumferentially surrounding the target lumen 2 is larger, the smaller the force of the surrounding portion 50 applied to the target lumen 2, the smaller the degree of deformation of the target lumen 2, and the faster the flow rate of the fluid in the target lumen 2; conversely, when the cross-sectional area of the surrounding portion 50 circumferentially surrounding the target lumen 2 is smaller, the target lumen 2 is subjected to a larger force by the surrounding portion 50, the degree of deformation of the target lumen 2 is larger, and the flow rate of the fluid in the target lumen 2 is slower.

In this embodiment, the body 10 may be a hollow structure and has a distal end 12 (e.g., a distal opening) such that the first surrounding element 20 and the second surrounding element 30 can extend from the inside of the body 10 to the outside of the body 10.

Specifically, with reference to fig. 2 and 3, the first and second surround members 20, 30 are axially movable in unison relative to the body 10 in a first direction (e.g., the direction F1 shown in fig. 2) such that a portion of each of the first and second surround members 20, 30 is movable from inside the body 10, via the distal end 12, to outside the body 10 such that the cross-sectional area of the surround 50 circumferentially surrounding the target lumen 2 is increased; alternatively, the first and second surround members 20, 30 may be moved axially in unison relative to the body 10 in a second direction (e.g., the direction F2 shown in FIG. 2) opposite the first direction such that a portion of each of the first and second surround members 20, 30 may be advanced from the exterior of the body 10 through the distal end 12 and into the interior of the body 10 such that the cross-sectional area of the surround 50 circumferentially surrounding the target lumen 2 is reduced.

Alternatively, the first surround 20 or the second surround 30 may be made of a flexible material.

Alternatively, the flexible material may include, but is not limited to: fibers, silica gel, latex, rubber, pvc, and the like.

In the present embodiment, the first surrounding element 22 or the second surrounding element 32 may include a hollow structure or a solid structure.

Preferably, the surface of the first surround 20 or the second surround 30 may be coated with an antibiotic layer or a lubricant coating layer.

In this embodiment, the cross-section of the first surrounding part 20 or the second surrounding part 30 can include but is not limited to: circular, oval, or rectangular.

Optionally, the locking structure 40 may include a through structure 42 disposed on one of the first surrounding element 20 and the second surrounding element 30 for movably passing through the other of the first surrounding element 20 and the second surrounding element 30. The penetrating structure 42 can be deformed by an external force to position the first surrounding element 20 or the second surrounding element 30 movably penetrating therethrough.

For example, in the embodiment shown in fig. 5, the penetrating structure 42 can be disposed on the second surrounding element 30 for movably penetrating the first surrounding element 20 therein, and the penetrating structure 42 can be pressed and deformed by a surgical tool to lock the first surrounding element 20 penetrating therein, thereby providing the mutual positioning and combination of the first surrounding element 20 and the second surrounding element 30.

Alternatively, the piercing structure 42 may include a crimp tube 44 (see FIG. 4).

In this embodiment, the pressing tube 62 may be a metal tube that is easy to deform.

Alternatively, the piercing structure 42 may also be a piercing ring 46.

In the present embodiment, the through ring 46 may have a circular cross-section (refer to fig. 6), a non-circular cross-section, a rectangular cross-section, or a polygonal cross-section.

Alternatively, the locking structure 40 may include a first locking unit 48 and a second locking unit 50 provided on the first and second surrounding members 20 and 30, respectively.

Alternatively, the first locking unit 48 may include a first positioning portion 482, and the second locking unit 50 may include a first penetration portion 502 and a locking portion 504 communicating with each other, wherein an inner diameter of the first penetration portion 502 may be slightly larger than an outer diameter of the first positioning portion 482, and an inner diameter of the locking portion 504 may be slightly smaller than the outer diameter of the first positioning portion 482.

The first surrounding member 20 or the second surrounding member 30 having the first positioning portion 482 can be movably inserted into the first insertion portion 502, and can enter the locking portion 504 from the first insertion portion 502, so that the first positioning portion 482 is abutted against one side or two opposite sides of the locking portion 504, and the first surrounding member 20 and the second surrounding member 30 form the surrounding portion 50.

For example, in the embodiment shown in fig. 5, the first locking unit 48 including the first positioning portion 482 is disposed on the first surrounding member 20, and the second locking unit 50 including the first penetrating portion 502 and the locking portion 504 is disposed on the second surrounding member 30, wherein the first surrounding member 20 is movably disposed in the first penetrating portion 502 of the second surrounding member 30, and can enter the locking portion 504 from the first penetrating portion 502, so that the first positioning portion 482 on the first surrounding member 20 abuts against one side or two opposite sides of the locking portion 504, so that the first surrounding member 20 and the second surrounding member 30 are combined with each other to form the surrounding portion 50.

It should be noted that the first locking unit 48 of the first positioning portion 482 may be disposed on the second surrounding member 30, and the second locking unit 50 including the first penetrating portion 502 and the locking portion 504 may be disposed on the first surrounding member 20, but is not limited to the configuration shown in fig. 5.

Alternatively, the first locking unit 48 may include a second positioning portion 484, and the second locking unit 50 includes a second penetration portion 506 (refer to fig. 9 and 10) that is switchable between a positioning state and a non-positioning state.

When the second penetrating portion 506 is in the non-positioning state, the first surrounding element 20 or the second surrounding element 30 provided with the second positioning portion 484 can be penetrated therein, and when the second penetrating portion 506 is in the positioning state, the second positioning portion 484 can be abutted against one side or two opposite sides of the second penetrating portion 506, so that the first surrounding element 20 and the second surrounding element 30 can form the surrounding portion 50.

Optionally, the second locking unit 50 may further include a through passage 508 (refer to fig. 9) communicating with the second through portion 506, so that the first surrounding part 20 or the second surrounding part 30 provided with the second positioning portion 484 may enter the second through portion 506 or exit from the second through portion 506 through the through passage 508.

Specifically, the second through hole 506 can be switched between the positioning state and the non-positioning state by the deformation of the through hole 508.

The through channel 468 may be L-shaped, but not limited thereto, and may be designed as a straight line or S-shaped.

It should be noted that, in addition to the above-mentioned structure design manner for providing the second penetrating portion 506 to be switchable between the positioning state and the non-positioning state, the second penetrating portion 506 switchable between the positioning state and the non-positioning state is also configured by a material design manner, for example, by using an elastically deformable material (refer to fig. 10).

In addition, the elastic stopping unit 5062 is disposed inside the second penetrating portion 506, so that the second penetrating portion 506 can be switched between a positioning state and a non-positioning state (see fig. 11).

For example, referring to the embodiment shown in fig. 9, the first locking unit 48 including the second positioning portion 484 may be provided on the second surround 30, and the second locking unit 50 including the second through portion 506 and the through passage 508 may be provided on the first surround 20.

In the embodiment, the second surrounding element 30 can enter the second penetrating portion 506 through the penetrating channel 508, or exit from the second penetrating portion 506 through the penetrating channel 508, and the second penetrating portion 506 can be switched between a positioning state and a non-positioning state by the design of the penetrating channel 508, so that the second surrounding element 30 can be displaced relative to the second penetrating portion 508 to adjust the cross-sectional area of the surrounding portion 50, or abut against one side or two opposite sides of the second penetrating portion 506 by the second positioning portion 48, so that the second surrounding element 30 is positioned relative to the first surrounding element 20.

Alternatively, the first positioning portion 482 or the second positioning portion 484 may include at least one positioning protrusion 62 distributed on the first surrounding part 20 or the second surrounding part 30, so that the first surrounding part 20 and the second surrounding part 30 form a surrounding part 50 with different cross-sectional areas (refer to fig. 5, 7, and 8).

In the case that the first positioning portion 482 or the second positioning portion 484 includes a plurality of positioning protrusions 62, the plurality of positioning protrusions 62 may be distributed on the first surrounding part 20 or the second surrounding part 30 at intervals.

In the present embodiment, the positioning protrusion 62 may include, but is not limited to: a circular cross section (refer to fig. 5), a rectangular cross section (refer to fig. 7), or a tapered cross section (refer to fig. 8), etc.

Optionally, the first positioning portion 482 or the second positioning portion 484 may also include at least one barb (not shown) distributed on the first surrounding part 20 or the second surrounding part 30.

Optionally, the first surrounding member 20 or the second surrounding member 30 provided with the second locking unit 50 may further include an operating portion 64 (refer to fig. 5, 9 to 11) adjacent to the second locking unit 50, and the second locking unit 50 may be positioned by the operating portion 64 for combining the first surrounding member 20 or the second surrounding member 30 provided with the first locking unit 48.

In the present embodiment, the second locking unit 50 can be driven by the operation portion 64 to move to a predetermined position, so that the first surrounding element 20 or the second surrounding element 30 provided with the first locking unit 48 can pass through the predetermined position.

Alternatively, the operating portion 64 may have a segment length of 1 to 2 cm.

In the present embodiment, the operation portion 64 can be used to combine with an operation tool (e.g. a surgical clamp, etc., not shown), and an anti-slip unit 642 (refer to fig. 12) can be further disposed on the operation portion 64 for positioning the operation tool relative to the operation portion 64, e.g. for firmly clamping the operation portion 64 by the surgical clamp to perform the relevant operation.

Alternatively, the locking structure 40 may include a strap structure 510 (see FIG. 13) disposed on each of the first and second surrounding members 20, 30.

Optionally, the end of the first and/or second surround 20, 30 further comprises a piercing structure 66 (see fig. 9-11) for providing the second surround 30 through the target tissue space to reach the predetermined tissue location.

Preferably, the piercing structure 66 may be provided at the end of the first 20 or second 30 surround provided with the first locking unit 48.

Alternatively, the piercing structure 66 may be tapered or oblate, and the material of construction of the piercing structure 66 may be somewhat harder than the material of construction of the first surround 20 or the second surround 30.

Alternatively, the piercing structure 66 may be integrally formed with the first surround 20 and/or the second surround 30, or the piercing structure 66 may be a separate component positioned at an end of the first surround 20 and/or the second surround 30.

Optionally, the lumen modifying instrument 1 may further include a bend control portion 74 (see fig. 14) associated with at least a portion of the first and/or second surrounding members 20, 30 for controlling the bending deformation of the first and/or second surrounding members 20, 30 according to a predetermined bending direction and a predetermined bending arc, thereby providing a surrounding tissue space through which the first and/or second surrounding members 20, 30 may conveniently penetrate the target lumen to complete the surgical procedure circumferentially surrounding the target lumen 2.

Optionally, the lumen adjusting instrument 1 may further comprise a combination 70 and a drive structure 72.

Wherein the assembly 70 may be located in the body 10 and respectively connect the first and second surrounds 20 and 30 (refer to fig. 2 and 3).

A drive structure 72 may be located at the proximal end 14 of the body 10 and connected to the assembly 70 (see in conjunction with fig. 2, 3 and 15) for controlling axial movement of the assembly 70 relative to the body 10 to cause axial synchronous movement of the first and second surround elements 20, 30 relative to the body 10, thereby adjusting the cross-sectional area of the surround 50.

Optionally, the lumen adjusting instrument 1 may further include an identification unit 68 (see fig. 15) provided on at least one of the body 10, the first surrounding member 20, and the second surrounding member 30 for identifying a moving distance of the assembly 70 (i.e., the first surrounding member 20 and the second surrounding member 30) relative to the body 10.

Optionally, the body 10 may also be made of a transparent material for observing the moving distance of the assembly 70 relative to the body 10, so as to achieve the purpose of accurately controlling the cross-sectional area of the surrounding portion.

Optionally, a resilient structure 76 is also provided inside the body 10.

In the present embodiment, the assembly 70 is axially movable relative to the body 10 in a first direction (e.g., the direction F2 shown in fig. 16) under the action of the driving structure 72 to elastically deform the elastic structure 76; alternatively, the assembly 70 may be moved relative to the body 10 in a second direction (e.g., the F1 direction shown in fig. 15) opposite to the first direction by the elastic restoring force of the elastic structure 76.

In this embodiment, when the assembly 70 is moved axially relative to the body 10 in a first direction (e.g., the direction F2 shown in fig. 15) by the driving structure 72, the cross-sectional area of the surrounding portion 50 is reduced, and when the assembly 70 is moved axially relative to the body 10 in a second direction (e.g., the direction F1 shown in fig. 15) by the elastic restoring force of the elastic structure 76, the cross-sectional area of the surrounding portion 50 is increased, thereby facilitating the release operation of the target lumen 2.

The results of performing the relevant simulation experiments and animal experiments using the lumen adjustment device of the present application are as follows:

in the actual laparoscopic liver operation, a doctor penetrates through the puncture outfit by using a catheter, wraps and tightens the hepatic portal blood vessel by using an operation clamp, the whole operation process takes about 10 minutes, the blood vessel cannot be repeatedly closed and loosened after the puncture outfit is tightened, and the doctor only can cut off the original catheter and wrap the catheter again after wanting to loosen the blood vessel for a period of time. In an independently designed experiment simulating laparoscopic liver surgery on a human body, the lumen control device of the present application was used to perform the experiment for 5 minutes from the beginning to the completion of the wrapping of the simulated hepatic portal vessel, and then the driving structure (72) (handle) was operated to rapidly close the vessel, simulating a diameter of the hepatic portal vessel of 3cm from the original diameter, and an extrusion reduction diameter of 2.08cm (pushed out by an average stroke of 2.9 cm)). The flow speed of fluid (water used in the experiment) flowing through the simulated blood vessel is gradually reduced to 0 from 2000ml/min (the blood flow of the liver of a normal human body is 1000-1800 ml/min), the driving structure (72) is controlled to loosen the surrounding simulated blood vessel, the diameter of the simulated blood vessel is restored, and the fluid (water) in the blood vessel continuously and circularly flows.

In an animal experiment center, the cavity tube adjusting instrument is used on an experimental pig to carry out hepatic portal vessel tightening operation under the liver laparoscope. After the laparoscopic pneumoperitoneum channel is established, 4.5 minutes are spent from the time that the cavity tube adjusting instrument of the application starts to enter the puncture outfit to finish surrounding the hepatic portal blood vessel of the pig, and the color of the pig liver is observed to change from the original bright red color to the ischemic black red color. The downstream pig liver tissue of the hepatic portal blood vessel is cut by a scalpel, and after a small amount of blood spots are found, the blood vessel in the cut tissue does not bleed, which shows that the blood vessel closing effect of the lumen tube regulating instrument is good.

To sum up, the lumen adjusting instrument of the application can form a surrounding part surrounding a target lumen in the circumferential direction by virtue of the first surrounding part and the second surrounding part which are movably connected with the body, and can not only accurately adjust the section area of the surrounding part by controlling the first surrounding part and the second surrounding part to move synchronously relative to the body, so that the target lumen can generate deformation in different degrees according to different section areas of the surrounding part, thereby achieving the purpose of accurately controlling the flow rate of liquid in the target lumen, and has the advantages of simple and small structural design and convenient operation.

Furthermore, by means of the synchronous axial reciprocating movement of the first surrounding part and the second surrounding part relative to the body, the circumference of the surrounding part which circumferentially surrounds the target cavity tube can be changed to be twice of the moving stroke of the first surrounding part and the second surrounding part relative to the body, so that the device has the advantages of short operating stroke, high closing efficiency and small instrument volume

In addition, the puncture structure arranged at the end part of the first surrounding part and/or the second surrounding part can be used for puncturing the tissue gap around the hepatic portal, so that the surrounding positioning of the target cavity tube is conveniently realized, and the smooth execution of the operation is facilitated.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the embodiments of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims (16)

1. A lumen adjusting instrument comprising:

a body;

the first surrounding part and the second surrounding part are respectively movably connected with the body;

a locking structure; wherein the content of the first and second substances,

at least one of the first surrounding part and the second surrounding part is provided with the locking structure, and the first surrounding part and the second surrounding part can be combined with each other to form a surrounding part which circumferentially surrounds the target cavity tube;

the first and second encircling members are synchronously movable back and forth relative to the body to adjust the cross-sectional area of the encircling portion and to deform the cross-section of the target lumen to different degrees depending on the different cross-sectional areas of the encircling portion.

2. The apparatus according to claim 1, wherein said body is a hollow structure and has a distal end;

the first and second surrounds are axially movable in unison in a first direction relative to the body such that a portion of each of the first and second surrounds moves from inside the body to outside the body via the distal end such that a cross-sectional area of the surround circumferentially surrounding the target lumen increases; alternatively, the first and second electrodes may be,

the first and second surrounds are synchronously movable axially relative to the body in a second direction opposite the first direction to cause a portion of each of the first and second surrounds to enter the interior of the body from the exterior of the body via the distal end such that a cross-sectional area of the surround circumferentially surrounding the target lumen is reduced.

3. The apparatus according to claim 2,

the first and second surrounds are each made of a flexible material comprising at least one of silicone, latex, resin, polyester, polyurethane;

the first surrounding member and the second surrounding member each include a hollow structure or a solid structure, and a cross section of each of the first surrounding member and the second surrounding member includes at least one of a circle, an ellipse, and a rectangle.

4. The instrument of claim 3, wherein the locking structure comprises a pass-through structure; wherein the content of the first and second substances,

one of the first surrounding part and the second surrounding part is provided with the penetrating structure so as to be movably penetrated and arranged in the other one of the first surrounding part and the second surrounding part;

and the penetrating structure can be deformed under the action of external force so as to position the first surrounding piece or the second surrounding piece movably penetrating through the penetrating structure.

5. The apparatus according to claim 4,

the penetrating structure can comprise a pressing pipe; or

The penetrating structure may include a penetrating ring having one of a circular cross-section, a non-circular cross-section, a rectangular cross-section, and a polygonal cross-section.

6. The instrument of claim 1, wherein the locking structure comprises first and second locking units disposed on the first and second surrounds, respectively.

7. The instrument of claim 6, wherein the first locking unit comprises a first positioning portion, and the second locking unit comprises a first penetrating portion and a locking portion that communicate with each other; wherein the content of the first and second substances,

the first surrounding part or the second surrounding part provided with the first positioning part can movably penetrate through the first penetrating part and can enter the locking part from the first penetrating part, so that the first positioning part is abutted against one side or two opposite sides of the locking part, and the first surrounding part and the second surrounding part form the surrounding part.

8. The apparatus according to claim 6, wherein the first locking unit comprises a second positioning portion, and the second locking unit comprises a second penetration portion switchable between a positioning state and a non-positioning state; wherein the content of the first and second substances,

when the second penetrating part is in the non-positioning state, the first surrounding part or the second surrounding part provided with the second positioning part can penetrate through the second penetrating part;

when the second penetrating part is in the positioning state, the second positioning part can be abutted against one side or two opposite sides of the second penetrating part, so that the first surrounding part and the second surrounding part form the surrounding part.

9. The apparatus according to claim 8, wherein the second locking unit further comprises a through passage communicating with the second through portion, so that the first surrounding member or the second surrounding member provided with the second positioning portion enters or exits from the second through portion via the through passage.

10. The apparatus according to claim 7,

the first positioning part comprises at least one positioning convex part distributed on the first surrounding part or the second surrounding part, so that the first surrounding part and the second surrounding part form the surrounding parts with different cross-sectional areas;

the locating boss may comprise a circular cross-section, a rectangular cross-section or a tapered cross-section.

11. The apparatus according to claim 8,

the second positioning part comprises at least one positioning convex part distributed on the first surrounding part or the second surrounding part, so that the first surrounding part and the second surrounding part form the surrounding parts with different cross-sectional areas;

the locating boss may comprise a circular cross-section, a rectangular cross-section or a tapered cross-section.

12. The apparatus according to any one of claims 7 to 9, wherein the first or second surround provided with the second locking unit further comprises an operating portion abutting the second locking unit, by means of which the second locking unit can be positioned for coupling with the first or second surround provided with the first locking unit.

13. The instrument of claim 1, wherein the locking structure comprises a cable tie structure disposed on the first and second surrounds.

14. The device of claim 1, wherein an end of the first and/or second surround further comprises a piercing structure for providing the second surround to pass through a target tissue space to reach a preset tissue location.

15. The apparatus according to claim 1, further comprising an identification unit provided on at least one of the body, the first surround, and the second surround for identifying a distance of movement of the first surround and the second surround relative to the body.

16. The instrument of claim 1, further comprising a combination located in the body and connecting the first and second surrounds, respectively;

and wherein the instrument further comprises a drive structure positioned at the proximal end of the body and connected to the assembly for controlling axial movement of the assembly relative to the body to move the first and second surrounds synchronously relative to the body.

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