CN114431913A

CN114431913A - Cavity tube adjusting instrument

Info

Publication number: CN114431913A
Application number: CN202210114582.0A
Authority: CN
Inventors: 刘辉; 张健东; 张金旻; 肖亮; 鲍涛; 高瑞林; 邹明浩; 倪凯; 王珂男; 董旻辉
Original assignee: Shanghai Oriental Medical Innovation Research Institute; Second Military Medical University SMMU
Current assignee: Shanghai Oriental Medical Innovation Research Institute; Second Military Medical University SMMU
Priority date: 2022-01-30
Filing date: 2022-01-30
Publication date: 2022-05-06

Abstract

The application provides a lumen tube adjusting instrument, mainly comprising a body, a fixed surrounding part, a movable surrounding part and a locking structure, wherein one of the fixed surrounding part of the fixed connecting body and the movable surrounding part of the movable connecting body is provided with the locking structure for positioning the other one of the fixed surrounding part and the movable surrounding part to form a surrounding part surrounding a target lumen tube in the circumferential direction, and the movable surrounding part can move back and forth relative to the body to adjust the section area of the surrounding part and enable the cross section of the target lumen 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.

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

In surgical operation, when tissues and organs with relatively rich blood flow are treated, in order to avoid excessive blood loss during operation, blood supply to the tissues and organs is often reduced by controlling the blood flow rate of main blood vessels of the tissues and organs, so that the risk of excessive blood loss of target tissues and organs during operation is reduced. For example, in liver resection surgery, it is common to reduce the risk during liver resection by blocking the blood flow in the hepatic portal blood vessels.

Current blood flow control apparatus is mainly through wrapping up the blood vessel to the free end that will block the area is fixed on the sheath pipe, then realizes the control to the liver portal blood flow through rear end control unit.

However, the operation of this blood flow control apparatus still has the following disadvantages: 1. after the blocking band bypasses the blood vessel, since the fixing device of the blocking band is positioned inside the sheath tube, the position of the sheath tube can be changed in the process of winding the blocking band, so that the fixing operation of the blocking band is difficult. 2. The blocking band is long, and after the blocking band is wrapped around a blood vessel, a doctor needs to fix the blocking band on the sheath tube, so that the blocking band cannot be tightly attached to the hepatic portal blood vessel, the gap between the blocking band and the hepatic portal blood vessel after the blocking band is fixed is large, and the design of the sheath tube is correspondingly long. 3. The portal of a patient who usually undergoes one liver operation can be adhered to other tissues around the portal, which results in that the blocking belt cannot easily pass through the tissue gap around the portal and cannot wrap the portal blood vessel in the second liver operation.

Disclosure of Invention

In view of the above, the present application provides a lumen adjustment instrument to overcome or at least partially address the above-mentioned problems.

Embodiments of the present application provide a lumen adjusting instrument, comprising: a body; a fixed surround fixedly connected to the body; the movable surrounding piece is movably connected with the body; a locking structure; the locking structure is arranged on at least one of the fixed surrounding piece and the movable surrounding piece, so that the fixed surrounding piece and the movable surrounding piece can be combined with each other to form a surrounding part which circumferentially surrounds the target cavity tube; the movable surround is reciprocally movable relative to the body to adjust the cross-sectional area of the surround and to deform the cross-section of the target lumen to different degrees depending on the different cross-sectional areas of the surround.

Optionally, the fixing surrounding piece comprises a fixing surrounding section exposed out of the body; the movable surrounding piece comprises a movable surrounding section and a movable adjusting section which is connected with the movable surrounding section and movably arranged in the body in a penetrating way; at least one of the fixed surrounding section and the movable surrounding section is provided with the locking structure for providing the mutual combination of the fixed surrounding section and the movable surrounding section so as to form the surrounding part exposed out of the body.

Optionally, the body is a hollow structure and has a distal end; the movable adjustment section is axially movable relative to the body in a first direction to expose a portion of the movable encircling section inside the body to the body via the distal end such that a cross-sectional area of the encircling portion circumferentially encircling the target lumen is increased; alternatively, the movable adjustment section may be axially movable relative to the body in a second direction opposite the first direction to cause a portion of the movable encircling section exposed to the body to enter the interior of the body via the distal end such that a cross-sectional area of the encircling portion circumferentially encircling the target lumen is reduced.

Optionally, the fixed surrounding segment or the movable surrounding segment is made of a flexible material, and the flexible material at least comprises one of silica gel, latex, resin, polyester and polyurethane; the fixed surrounding section or the movable surrounding section comprises a hollow structure or a solid structure, and the cross section of the fixed surrounding section or the movable surrounding section at least comprises one of a circle, an ellipse and a rectangle.

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

Optionally, the piercing structure may comprise a press fit tube structure; or the penetrating structure may include a ring structure 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 comprises: a first locking unit provided on one of the fixed surrounding section and the movable surrounding section; a second locking unit provided on the other of the fixed surrounding section and the movable surrounding section.

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

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 fixed surrounding section or the movable surrounding section provided with the second positioning part can be movably penetrated and arranged therein; 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 fixed surrounding section and the movable surrounding section form the surrounding part.

Optionally, the second locking unit further includes a penetrating passage communicating with the second penetrating portion, so that the fixed surrounding section or the movable surrounding section provided with the second penetrating 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 fixed surrounding section or the movable surrounding section, so that the fixed surrounding section and the movable surrounding section form the surrounding portion with different cross-sectional areas; wherein the positioning protrusion may include a rectangular cross-section, a tapered cross-section, a circular cross-section.

Optionally, the first locking unit is disposed on the fixed surrounding section, and the second locking unit is disposed on the movable surrounding section.

Optionally, the fixed surrounding segment or the movable surrounding segment provided with the first locking unit further comprises an operating portion adjacent to the first locking unit, and the first locking unit can be positioned by the operating portion so as to be combined with the fixed surrounding segment or the movable surrounding segment provided with the second locking unit.

Optionally, the locking structure comprises a strap structure provided on the fixed encircling section and the movable encircling section, respectively.

Optionally, the ends of the fixed and/or movable loops further comprise a piercing structure for providing the fixed or movable loops through a target tissue space to reach a predetermined tissue location.

Optionally, the apparatus further comprises an identification unit provided on the body and/or the movable surround for identifying a movement distance of the movable surround relative to the body.

Optionally, the instrument further comprises a drive structure located at the proximal end of the body and connected to the movable surround for controlling movement of the movable surround relative to the body.

In summary, the lumen regulating device of the present embodiment can precisely and rapidly regulate the cross-sectional area of the surrounding portion by controlling the movable surrounding member to reciprocate relative to the body, so as to achieve the purpose of precisely controlling the flow rate of the liquid in the target lumen.

Furthermore, the lumen adjusting instrument of the present embodiment can conveniently realize the positioning and wrapping operation of the surrounding part relative to the target lumen by the design of the locking structure, so as to facilitate the smooth execution of the operation.

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.

Fig. 4 to 12 are partial schematic structural views of different embodiments of the lumen control device of the present application.

FIG. 13 is a schematic diagram of an 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 stationary surround;

22: fixing the surrounding section;

24: an operation section;

242: an anti-slip unit;

30: a movable surround;

32: a movable surrounding section;

34: moving the adjusting section;

36: a puncture structure;

40: a locking structure;

42: a penetrating structure;

422: pressing a pipe structure;

424: a cyclic structure;

426: perforating holes;

44: a first locking unit;

442: a first positioning portion;

442a, a positioning convex part;

444: second positioning part

46: a second locking unit;

462: a first penetration portion;

464: a locking portion;

466: a second penetration portion;

468: a channel is arranged in a penetrating way;

48: a band structure;

50: a surrounding portion;

60: an identification unit;

70: a drive 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.

At present, with the development of medical census, part of tumors can be diagnosed in time, and the main method for treating the tumors is still a surgical operation. When a substantive organ with abundant blood vessels (such as a liver, a kidney, a spleen and the like) is operated, intraoperative hemorrhage control is always a key point for limiting the development of minimally invasive surgical techniques, for example, systemic blood flow can circulate in the liver once every 25 seconds, and excessive bleeding is often a key cause for serious complications and even death of a patient.

Modern surgery is always oriented to minimally invasive operations such as endoscopy, but the prior hepatic portal vessel blocking technology is directly applied to a laparoscopic environment, and further technical training is required due to the limitations of the operation visual field, the range and the like. The types of laparoscopic hepatectomy procedures that have therapeutic advantages are significantly limited due to limitations in the development of blood flow control techniques. The above problem can be summarized as follows: 1, the liver resection technology has high threshold and is not easy to popularize; 2 hepatectomy operation which is easy to bleed greatly can not be implemented in a laparoscope environment, thus increasing the operation risk of a patient; 3 the existing hepatic portal vessel blocking technology needs a plurality of specific procedures to block, and the complex process increases the operation risk.

Furthermore, with the revolution of surgical medical instruments, the liver cutting technique is gradually improved by jaw bundling to a high frequency electrosurgery workstation (energy platform), an ultrasonic knife, a Ligasure vessel closer, and the like. The condition of bleeding in the process of hepatectomy is improved, but the effect of hemostasis is better for small blood vessels, and for bleeding control of complicated hepatectomy operations close to large blood vessels, special parts and the like, the traditional technology of controlling and controlling controlled release for hepatic blood vessel bundling is still the basic guarantee for smoothly developing the difficult operations. Therefore, the widespread use of laparoscopic hepatectomy and new surgical medical instruments places higher demands on bleeding control.

Aiming at the existing operation technology for controlling the blood flow of a target blood vessel, a device which can surround the target blood vessel and press the blood vessel is needed, in particular to an operation auxiliary device which meets the restriction of the operation condition of an endoscope. Vascular wrapping becomes the most effective solution for bleeding control closest to the routine clinical practice.

Chinese utility model patent no 212369027U provides a blood vessel surrounding structure, and the line area that mainly is made by a rubber hose constitutes, however, the line area is under the chamber mirror operation process because the restriction of operation route becomes more difficult, and this line area structure also can't control release blood vessel blood flow in real time and block, has restricted smooth, the safe completion of many operations that probably have the heavy bleeding under the chamber mirror.

In addition, china using the new patent 212939836U provides a blocking forceps, however, since the operation of controlling blood flow by the forceps may be difficult to cover the circumference of the blood vessel, the purpose of effectively controlling the blood flow rate cannot be achieved; moreover, the head of the forceps holder has insufficient curvature, so that the forceps holder cannot clamp a special target blood vessel, and due to the structural design with overlarge curvature, the blood vessel cannot pass through the operation hole of the endoscope, so that the application of the blood vessel under the endoscope is limited, and the blood flow blockage of the blood vessel cannot be controlled in real time by the structure.

Furthermore, chinese utility model patent 210631257U provides a blood flow controller, though this blood flow controller can block at the real-time controlled release vascular blood flow of chamber mirror, nevertheless has the problem of apparatus complex operation to its locking end is rigid connection, and it is big to lead to the auto-lock operation degree of difficulty, and because the hepatic portal diameter of different human bodies is different, leads to its vascular mounting prefabricated length very long, consequently, also very big to the required stroke of controlling the handle, has increased the operation degree of difficulty of handle.

Therefore, how to provide an improved blood flow control technology can change the traditional way of blocking first and then operating into a surgical method of blocking first and then operating according to needs, and improve the problems of long operation time, untimely blood vessel blocking adjustment, the need of multiple persons to cooperate to complete the blocking operation, and the like in the traditional blood vessel blocking operation, which is a technical subject to be solved urgently in the present application.

The following further describes specific implementations of 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 fixed surrounding member 20, a movable surrounding member 30, and a locking structure 40.

The fixed surrounding member 20 is fixedly connected to the body 10, and the movable surrounding member 30 is movably connected to the body 10.

Optionally, a locking structure 40 is provided on at least one of the fixed and movable surrounds 20 and 30.

In one embodiment, referring to the embodiment shown in fig. 1-5, the locking structure 40 is disposed on the fixing surround 20; in another embodiment, referring to the embodiment shown in fig. 6 to 6, the locking structure 40 is disposed on the fixed surrounding member 20 and the movable surrounding member 30; in other embodiments, the locking structure 40 may be disposed only on the movable surrounding member 30 (not shown).

The locking structure 40 allows the stationary surround 20 and the movable surround 30 to be positioned in combination with each other to form a surround 50 that circumferentially surrounds the target lumen 2 (see the embodiment of fig. 3-7).

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

In this embodiment, the movable surrounding member 30 is reciprocally movable relative to the body 10 to adjust the cross-sectional area of the surrounding portion 50, and to deform the cross-section of the target lumen 2 to different degrees according to the different cross-sectional areas of the surrounding portion 50, thereby adjusting the flow rate of the fluid in the target lumen 2.

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 the present embodiment, the body 10 is a hollow structure and has a distal end 12 (e.g., a distal opening) for the movable surrounding element 32 to extend from the inside of the body 10 to the outside of the body 10.

Referring to fig. 2, the fixed surrounding member 20 may be fixedly connected to the distal end 12 of the body 10 and includes a fixed surrounding section 22 exposed from the body 10, and the movable surrounding member 30 may include a movable surrounding section 32 and a movable adjusting section 34 connected to the movable surrounding section 32 and movably disposed in the body 10.

In the present embodiment, at least one of the fixed surrounding section 22 and the movable surrounding section 32 is provided with a locking structure 40 for providing the fixed surrounding section 22 and the movable surrounding section 32 to combine with each other to form a surrounding portion 50 exposed to the body 10.

In the embodiment shown in fig. 2, the locking structure 40 may be disposed on the fixed surrounding segment 22 for combining the movable surrounding segment 32 thereon, such that the fixed surrounding segment 22 and the movable surrounding segment 32 are combined with each other to form a surrounding portion 50 circumferentially surrounding the target lumen 2 (refer to the state shown in fig. 3).

Specifically, the movable adjustment segment 34 may be axially moved relative to the body 10 in a first direction (e.g., the direction F1 shown in fig. 2) such that a portion of the movable encircling segment 32 inside the body 10 is exposed to the body 10 via the distal end 12 of the body 10, such that the cross-sectional area of the encircling portion 50 circumferentially encircling the target lumen 2 is increased.

Alternatively, the movable adjustment section 34 may be axially moved relative to the body 10 in a second direction (e.g., the direction F2 shown in fig. 2) opposite the first direction to allow a portion of the movable encircling section 32 exposed to the body 10 to enter the interior of the body 10 via the distal end 12 such that the cross-sectional area of the encircling portion 50 circumferentially encircling the target lumen 2 is reduced.

In this embodiment, the fixed surrounding segment 22 or the movable surrounding segment 32 can be made of a flexible material. Alternatively, the flexible material may include, but is not limited to: silicone, latex, resin, polyester, polyurethane, and the like.

In the present embodiment, the fixed surrounding segment 22 or the movable surrounding segment 32 may include a hollow structure or a solid structure.

Preferably, the surface of the fixed surrounding section 22 or the movable surrounding section 32 may be coated with an antibiotic layer or a lubricant coating layer.

In this embodiment, the cross-section of the fixed surrounding segment 22 or the movable surrounding segment 32 may include, but is not limited to: circular, oval, or rectangular.

Alternatively, the locking structure 40 may include a penetrating structure 42, which may be disposed on one of the fixed surrounding section 22 and the movable surrounding section 32 for movably penetrating the other of the fixed surrounding section 22 and the movable surrounding section 32, and wherein the penetrating structure 42 may be deformed by an external force to position the fixed surrounding section 22 or the movable surrounding section 32 movably penetrating therein.

For example, in the embodiment shown in fig. 4 and 5, the locking structure 40 is a penetrating structure 42 disposed on the fixed surrounding section 32 for penetrating the movable surrounding section 32 therein, and the penetrating structure 42 can be irreversibly deformed by an external force to fixedly penetrate the movable surrounding section 32 therein.

Alternatively, the lead-through structure 42 may include a pinch tube structure 422 (see the embodiment shown in fig. 4).

Optionally, the lead-through structure 42 may also include a ring structure 424 (see the embodiment shown in fig. 5).

In the present embodiment, the ring structure 424 may include, but is not limited to: one of a circular cross-section, a non-circular cross-section, a rectangular cross-section, a polygonal cross-section.

Alternatively, the through structure 42 may be designed with a self-locking through hole 426 (refer to fig. 12).

Alternatively, the locking structure 40 may include a first locking unit 44 and a second locking unit 46. Wherein, the first locking unit 44 is disposed on one of the fixed surrounding section 22 and the movable surrounding section 32, and the second locking unit 46 is disposed on the other of the fixed surrounding section 22 and the movable surrounding section 32.

In an embodiment, the first locking unit 44 may include a first positioning portion 442, and the second locking unit 46 may include a first penetrating portion 462 and a locking portion 464 communicating with each other, wherein an inner diameter of the first penetrating portion 462 may be slightly larger than an outer diameter of the first positioning portion 442, and an inner diameter of the locking portion 464 is slightly smaller than the outer diameter of the first positioning portion 442.

The fixed surrounding segment 22 or the movable surrounding segment 32 with the first positioning portion 442 can be movably inserted into the first insertion portion 462 and can enter the locking portion 464 through the first insertion portion 462, so that the first positioning portion 442 abuts against one side or two opposite sides of the locking portion 464, and the fixed surrounding segment 22 and the movable surrounding segment 32 form the surrounding portion 50.

For example, referring to the embodiment shown in fig. 6, the first locking unit 44 including the first positioning portion 442 may be disposed on the fixed surrounding segment 22, and the second locking unit 46 including the first penetrating portion 462 and the locking portion 464 communicating with each other may be disposed on the movable surrounding segment 32, wherein the fixed surrounding segment 22 is movably penetrated in the first penetrating portion 462 of the movable surrounding segment 32 and can enter the locking portion 464 from the first penetrating portion 462, so that the first positioning portion 442 on the fixed surrounding segment 22 abuts against one side or opposite sides of the locking portion 464, so that the fixed surrounding segment 22 and the movable surrounding segment 32 are combined with each other to form the surrounding portion 50.

It should be noted that the first locking unit 44 including the first positioning portion 442 may be disposed on the movable surrounding section 32, and the second locking unit 46 including the first penetrating portion 462 and the locking portion 464 communicating with each other may be disposed on the fixed surrounding section 22, which is not limited to the embodiment shown in fig. 6.

In this embodiment, the first positioning portion 442 may include at least one positioning protrusion 442a distributed on the fixed surrounding section 22 or the movable surrounding section 32, such that the fixed surrounding section 22 and the movable surrounding section 32 form a surrounding portion 50 with different cross-sectional areas for circumferentially surrounding the target lumen 2 with different tube diameters.

Alternatively, the positioning tabs 442a may include, but are not limited to: a rectangular cross section (refer to fig. 9), a tapered cross section (refer to fig. 10), but not limited thereto, and may be designed as a circular tapered surface, a drop-shaped interface, or the like.

Optionally, the first positioning portion 442 may also include at least one barb (not shown) distributed on the fixed surrounding segment 22 or the movable surrounding segment 32.

Alternatively, the first locking unit 44 may include the second positioning portion 444, and the second locking unit 46 includes the second through portion 466 switchable between the positioning state and the non-positioning state.

When the second penetrating portion 466 is in the non-positioning state, the fixed surrounding segment 22 or the movable surrounding segment 32 provided with the second positioning portion 444 can be movably penetrated therein; when the second penetrating portion 466 is in the positioning state, the second positioning portion 444 can abut against one side or two opposite sides of the second penetrating portion 466, so that the fixed surrounding segment 22 and the movable surrounding segment 32 form the surrounding portion 50.

Optionally, the second locking unit 46 may further include a penetrating passage 468 communicating with the second penetrating portion 466, so that the fixed surrounding segment 22 or the movable surrounding segment 32 provided with the second positioning portion 444 may enter the second penetrating portion 466 or exit from the second penetrating portion 466 through the penetrating passage 468.

In the present embodiment, the second through hole 466 can be switched between the positioning state and the non-positioning state by the deformation of the through hole 468. In addition to the above-mentioned structure design manner providing the second penetrating portion 466 that can be switched between the positioning state and the non-positioning state, the second penetrating portion 466 is also formed by a material design manner, for example, by using an elastically deformable material, so that the second penetrating portion 466 can be switched between the positioning state and the non-positioning state.

For example, referring to the embodiment shown in fig. 7, the first locking unit 44 including the second positioning portion 444 may be disposed on the stationary surrounding section 22, and the second locking unit 46 including the second through-going portion 466 and the through-going passage 468 may be disposed on the movable surrounding section.

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

In this embodiment, the fixed surrounding element 22 can enter the second penetrating portion 466 through the penetrating passage 468, or exit from the second penetrating portion 466 through the penetrating passage 468, and the second penetrating portion 466 can be switched between a positioning state and a non-positioning state by the design of the penetrating passage 468, so that the fixed surrounding element 22 can be displaced relative to the second penetrating portion 466 to adjust the cross-sectional area of the surrounding portion 50, or the second positioning portion 444 abuts against one side or two opposite sides of the second penetrating portion 466, so that the fixed surrounding segment 22 is positioned relative to the movable surrounding segment 32.

In this embodiment, the second positioning portion 444 may also include at least one positioning protrusion 442a distributed on the fixed surrounding section 22 or the movable surrounding section 32, so that the fixed surrounding section 22 and the movable surrounding section 32 form a surrounding portion 50 with different cross-sectional areas for circumferentially surrounding the target lumens 2 with different tube diameters.

Optionally, the second positioning portion 444 may also include at least one barb (not shown) distributed on the fixed surrounding segment 22 or the movable surrounding segment 32.

Optionally, the fixed surrounding segment 22 or the movable surrounding segment 32 provided with the first locking unit 44 may further include an operating portion 24 adjacent to the first locking unit 44, and the operating portion 24 may drive the first locking unit 44 to move to a predetermined position and be positioned, so as to combine the fixed surrounding segment 22 or the movable surrounding segment 32 provided with the second locking unit 46.

Alternatively, the operating portion 24 may have a segment length of 1 to 2 centimeters.

In the present embodiment, the operation portion 24 may be provided to be combined with an operation tool (e.g., a forceps, etc., not shown), and an anti-slip unit 242 (refer to fig. 11) may be further disposed on the operation portion 24 for positioning the operation tool with respect to the operation portion 24, e.g., for firmly clamping the operation portion 24 with the forceps to perform a related operation.

Alternatively, the locking structure 40 may include a strap structure 48 (see the embodiment shown in FIG. 8) disposed on the fixed and movable encircling

sections

22, 32, respectively.

Optionally, the ends of the fixed and/or movable surrounds 20, 30 may further include a piercing structure 36 for providing the fixed or movable surrounds 20, 30 to pass through the targeted tissue space to reach the predetermined tissue location.

Preferably, the puncturing structure 36 may be provided at an end of the fixed surrounding member 20 or the movable surrounding member 30 provided with the first locking unit 44 including the first positioning portion 442 or the second positioning portion 444 (refer to the embodiment shown in fig. 6 and 7).

Alternatively, the piercing structure 36 may be tapered or oblate.

Alternatively, the piercing structure 36 may be integrally formed with the fixed and/or movable surrounds 20, 30, or the piercing structure 36 may be a separate component positioned at the end of the fixed and/or movable surrounds 20, 30.

Optionally, the lumen adjusting instrument 1 may further include an identification unit 60 (refer to fig. 13) provided on the body 10 and/or the movable surround 30 for identifying a moving distance of the movable surround 30 with respect to the body 10.

Optionally, the body 10 may also be made of a transparent material for observing the moving distance of the movable surrounding element 30 relative to the body 10.

Referring to FIG. 13, the lumen modulating instrument 1 may further include an actuating structure 70 located at the proximal end 14 of the body 10 and connected to the movable surround 30 for controlling movement of the movable surround 30 relative to the body 10.

To sum up, the lumen adjusting instrument of the application comprises a surrounding part surrounding a target lumen circumferentially by a fixed surrounding part of a fixed connecting body and a movable surrounding part of a movable connecting body, and the movable surrounding part is controlled to move relative to the body so as to adjust the cross-sectional area of the surrounding part, so that the target lumen can be deformed to different degrees according to different cross-sectional 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.

In addition, the locking structure with the self-locking function arranged on the fixed surrounding part and/or the movable surrounding part can conveniently realize the combination and positioning between the fixed surrounding part and the movable surrounding part so as to reduce the operation difficulty and the operation hands and be beneficial to the smooth execution of the operation

Moreover, the puncture part arranged at the end part of the fixed surrounding part and/or the movable surrounding part can be used for puncturing the tissue gap around the hepatic portal, thereby conveniently realizing the surrounding positioning of the target lumen tube and being beneficial to the smooth execution of the operation.

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 of the embodiments of the present application.

Claims

1. A lumen adjusting instrument comprising:

a body;

a fixed surround fixedly connected to the body;

the movable surrounding piece is movably connected with the body;

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

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

the movable surround is reciprocally movable relative to the body to adjust the cross-sectional area of the surround and to deform the cross-section of the target lumen to different degrees depending on the different cross-sectional areas of the surround.

2. The apparatus according to claim 1,

the fixing surrounding piece comprises a fixing surrounding section exposed out of the body;

the movable surrounding piece comprises a movable surrounding section and a movable adjusting section which is connected with the movable surrounding section and movably arranged in the body in a penetrating way;

at least one of the fixed surrounding section and the movable surrounding section is provided with the locking structure for providing the mutual combination of the fixed surrounding section and the movable surrounding section so as to form the surrounding part exposed out of the body.

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

the movable adjustment section is axially movable relative to the body in a first direction to expose a portion of the movable encircling section inside the body to the body via the distal end such that a cross-sectional area of the encircling portion circumferentially encircling the target lumen is increased; alternatively, the first and second electrodes may be,

the movable adjustment section is axially movable relative to the body in a second direction opposite the first direction to cause a portion of the movable encircling section exposed to the body to enter the interior of the body via the distal end such that a cross-sectional area of the encircling portion circumferentially encircling the target lumen is reduced.

4. The apparatus according to claim 2,

the fixed surrounding section or the movable surrounding section is made of a flexible material, and the flexible material at least comprises one of silica gel, latex, resin, polyester and polyurethane;

the fixed surrounding section or the movable surrounding section comprises a hollow structure or a solid structure, and the cross section of the fixed surrounding section or the movable surrounding section at least comprises one of a circle, an ellipse and a rectangle.

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

one of the fixed surrounding section and the movable surrounding section is provided with the penetrating structure so as to be movably penetrated and arranged in the other one of the fixed surrounding section and the movable surrounding section;

and wherein the penetrating structure can be deformed under the action of external force to position the fixed surrounding section or the movable surrounding section penetrating through the penetrating structure.

6. The apparatus according to claim 5,

the penetrating structure can comprise a press fit tube structure; or

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

7. The instrument of claim 1, wherein the locking structure comprises:

a first locking unit provided on one of the fixed surrounding section and the movable surrounding section;

a second locking unit provided on the other of the fixed surrounding section and the movable surrounding section.

8. The instrument of claim 7, 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 fixed surrounding section or the movable surrounding section provided with the first positioning portion can movably penetrate through the first penetrating portion and can enter the locking portion from the first penetrating portion, so that the first positioning portion is abutted against one side or two opposite sides of the locking portion, and the fixed surrounding section and the movable surrounding section form the surrounding portion.

9. The apparatus according to claim 7, wherein the first locking unit includes a second positioning portion, and the second locking unit includes 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 fixed surrounding section or the movable surrounding section provided with the second positioning part can be movably penetrated and arranged therein;

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 fixed surrounding section and the movable surrounding section form the surrounding part.

10. The apparatus according to claim 9, wherein the second locking unit further comprises a penetrating channel communicating with the second penetrating portion, so that the fixed surrounding segment or the movable surrounding segment provided with the second positioning portion enters or exits from the second penetrating portion through the penetrating channel.

11. The apparatus according to claim 8 or 9,

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

wherein the positioning protrusion may include a rectangular cross-section, a tapered cross-section, a circular cross-section.

12. The apparatus according to any one of claims 8 to 10, wherein a first locking unit is provided to the stationary surrounding section and a second locking unit is provided to the movable surrounding section.

13. The apparatus according to any one of claims 8 to 10, wherein the stationary surrounding section or the movable surrounding section provided with the first locking unit further comprises an operating portion adjoining the first locking unit, by means of which the first locking unit can be positioned for coupling with the stationary surrounding section or the movable surrounding section provided with the second locking unit.

14. The instrument of claim 4, wherein the locking structure comprises a cable tie structure disposed on the fixed surrounding segment and the movable surrounding segment, respectively.

15. The device of claim 1, wherein the ends of the stationary and/or movable surrounds further comprise a piercing structure for providing the stationary or movable surrounds through a target tissue space to reach a preset tissue location.

16. The apparatus according to claim 1, further comprising an identification unit provided on the body and/or the movable surround for identifying a movement distance of the movable surround relative to the body.

17. The apparatus according to claim 1, further comprising a drive structure located at the proximal end of the body and connected to the movable surround for controlling movement of the movable surround relative to the body.