CN215821088U - Multi-cavity tube and nipple sphincter incision knife - Google Patents

Abstract

The embodiment of the utility model provides a multi-cavity tube and a nipple sphincter incision knife, and relates to the field of medical instruments. Embodiments of the present invention provide a multi-lumen tube comprising a tube body and having a guidewire lumen, at least one functional lumen, and at least one communication aperture therein. At least one function chamber is arranged corresponding to at least one communicating hole one by one, and at the far end of the tube body, at least one function chamber is communicated with the guide wire chamber through the corresponding communicating hole, so that at the far end of the tube body, the guide wire chamber is communicated with at least one function chamber to form a chamber, the size of the far end of the tube body is reduced, and the size of the outer diameter of the far end of the tube body can be set to be smaller than that of the outer diameter of the near end of the tube body.

Description

Multi-cavity tube and nipple sphincter incision knife

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a multi-cavity tube and a nipple sphincter incision knife.

Background

Endoscopic Retrograde Cholangiopancreatography (ERCP) is a technique in which a duodenoscope is inserted into the descending part of the duodenum, the papilla of the duodenum (hereinafter referred to as the papilla) is found, a contrast catheter is inserted into the opening of the papilla from a biopsy channel, and an x-ray photograph is taken after a contrast medium is injected to display the cholangiopancreatography. Because ERCP does not need to be operated, the trauma is small, the operation time is short, the complication is less than that of the surgical operation, the hospitalization time is greatly shortened, and the ERCP is popular with patients.

Papillary sphincterotomes are commonly used for pancreaticobiliary system cannulation and sphincterotomy (EST). EST is a treatment technology which is further developed on the basis of the diagnostic technology of ERCP and is used for incising the duodenal papilla sphincter and the end part of the common bile duct under an endoscope by using a high-frequency electric incision knife.

In a natural state of the duodenal papilla of the human body, the duodenal papilla is tightened due to the action of the annular sphincter to form a small papilla opening, so that the distal end of the multi-lumen tube of the papilla sphincter incision knife needs to be set to a sufficiently small size in order to facilitate the papilla sphincter incision knife to enter the papilla.

SUMMERY OF THE UTILITY MODEL

Objects of the present invention include, for example, providing a multi-lumen tube that can have a smaller distal tip to facilitate smooth access to the nipple.

The object of the present invention is also to provide a teat sphincter opening knife which can improve the problem of inconvenience of entering the teat as in the prior art.

Embodiments of the utility model may be implemented as follows:

the embodiment of the utility model provides a multi-cavity tube for a nipple sphincter incision knife, which comprises a tube body, wherein a guide wire cavity, at least one functional cavity and at least one communication hole are formed in the tube body, and the at least one functional cavity and the at least one communication hole are arranged in a one-to-one correspondence manner; at least one functional cavity channel is communicated with the guide wire cavity channel through the corresponding communication hole at the far end of the tube body;

wherein the outer diameter of the distal end of the tube body is smaller than the outer diameter of the proximal end of the tube body.

Optionally, the distal end of the tube body is a frustum-shaped structure with an outer diameter gradually decreasing from the proximal end of the tube body to the distal end of the tube body.

Optionally, the distal end surface of the frustum-shaped structure and the circumferential surface of the frustum-shaped structure are in smooth transition through a fillet.

Optionally, a cutting cavity channel with a closed distal end is arranged in the tube body, and the distal end of the cutting cavity channel is located on one side of the proximal end of the frustum-shaped structure.

Optionally, a fusion cavity channel is arranged at one side of the far end of the communicating position of the guide wire cavity channel and the communicating hole, and an obtuse angle is formed between the axis of the fusion cavity channel and the axis of the guide wire cavity channel.

Optionally, at least one of the at least one functional channel is a liquid injection channel, the communication hole corresponding to the liquid injection channel is a liquid injection hole, and the sectional area of the liquid injection hole is greater than or equal to that of the liquid injection channel.

Optionally, the sectional area of the liquid injection hole is S1, the sectional area of the liquid injection channel is S2, and S1 is not less than 1.5S 2.

Optionally, the number of the functional lumens is an even number greater than or equal to 2, a filament cutting lumen is further arranged in the multi-lumen tube, and the functional lumens are symmetrically distributed on the cross section of the multi-lumen tube about a connection line between the axis of the filament cutting lumen and the axis of the filament guiding lumen.

Optionally, the distal end of the filament cutting cavity is closed, the tube body is provided with a filament cutting inlet and a filament cutting outlet which are respectively communicated with the filament cutting cavity, the filament cutting inlet and the filament cutting outlet both penetrate through the outer peripheral surface of the tube body, the filament cutting outlet is used for enabling the filament cutting assembly in the filament cutting cavity to penetrate out of the tube body, and the filament cutting inlet is used for enabling the filament cutting assembly penetrating out of the tube body to penetrate back into the filament cutting cavity.

Optionally, a connecting pipe is further disposed at the distal end of the filament cutting cavity, and the connecting pipe is used for being connected with the distal end of the filament cutting assembly.

Optionally, the communication hole is a strip-shaped hole extending along the axial direction of the functional channel.

Optionally, the distance between the far end of the communicating hole and the far end face of the tube body is D, and D is larger than or equal to 3mm and smaller than or equal to 5 mm.

Optionally, the communication hole is communicated with the guide wire lumen along the radial direction of the corresponding functional lumen.

Embodiments of the present invention also provide a nipple sphincter incision knife. The nipple sphincter incision knife comprises a guide wire joint, an operating handle, a cutting wire assembly and the multi-cavity tube; the distal end of the guide wire joint is connected with the multi-cavity tube, and the operating handle is connected with the distal end of the guide wire joint; the shredding assembly penetrates through the shredding cavity channel of the multi-cavity pipe and is connected with the operating handle, so that the shredding assembly is operated through the operating handle.

Optionally, the nipple sphincter incision sword still includes and annotates the liquid joint, the near-end of multi-chamber pipe passes the seal wire connect with annotate the distal end that the liquid connects and connect, operating handle with annotate the near-end that the liquid connects and connect, just annotate the liquid joint with at least part intercommunication in the function chamber way, in order to pass through annotate the liquid joint to corresponding the function chamber way is annotated liquid.

The multi-lumen tube and teat sphincter incision knife of the embodiments of the present invention have the following beneficial effects, for example:

embodiments of the present invention provide a multi-lumen tube for a papillary sphincter incision knife. The multi-cavity tube comprises a tube body, and a guide wire cavity, at least one functional cavity and at least one communicating hole are arranged in the tube body. At least one function chamber is arranged corresponding to at least one communicating hole one by one, and at the far end of the tube body, at least one function chamber is communicated with the guide wire chamber through the corresponding communicating hole, so that at the far end of the tube body, the guide wire chamber is communicated with at least one function chamber to form a chamber, the size of the far end of the tube body is reduced, and the size of the outer diameter of the far end of the tube body can be set to be smaller than that of the outer diameter of the near end of the tube body. And when the function cavity is used as the liquid injection cavity, the contrast agent in the liquid injection cavity has enough space for the flow of the contrast agent after entering the guide wire cavity, the liquid injection is easy and convenient, and compared with the existing multi-cavity tube, the liquid outflow pressure is reduced, thereby improving the problem of bile duct injury caused by overlarge pressure. And when bile is sucked through the functional cavity, the bigger cavity can reduce negative pressure, and the damage caused by accidental adsorption to the wall of the bile duct is reduced.

Embodiments of the present invention also provide a papillary sphincter opening knife comprising the multi-lumen tube described above. Because this nipple sphincter opens sword includes foretell multicavity pipe, consequently also have distal end tip size little, be convenient for get into the nipple, annotate the liquid light and convenient, can improve the beneficial effect of the bile duct damage problem that causes because pressure is too big.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic view of the overall structure of a papillary sphincter incision knife provided by the embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a multi-lumen tube provided in accordance with an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of a distal end of a multi-lumen tube provided in accordance with an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of a multi-lumen tube at a communication port provided in an embodiment of the present invention;

FIG. 5 is a schematic structural view of a guide wire joint in a papillary sphincter incision knife provided by the embodiment of the present invention;

FIG. 6 is a schematic structural view of a liquid injection joint of the teat sphincter incision knife according to the embodiment of the present invention;

FIG. 7 is a schematic cross-sectional view of a connection part between a second metal conduit and an injection channel in the papillary sphincter incision knife according to the embodiment of the present invention;

FIG. 8 is a schematic cross-sectional view of a fusion lumen in a multi-lumen tube according to an embodiment of the present invention.

Icon: 10-papillary sphincter incision knife; 100-a multi-lumen tube; 110-a tube body; 111-shredding lumen; 112-shredding inlet; 113-guidewire lumen; 114-functional lumen; 115-fluid injection cavity; 116-a communication hole; 117-fusion lumen; 118-axis of symmetry; 119-frustum shaped structure; 120-connecting tube; 131-a first groove; 132-a second slot; 210-a guide wire junction; 211-a first metal conduit; 220-liquid injection joint; 221-a second metal conduit; 230-an operating handle; 231-core rod; 232-finger ring; 240-shredding assembly.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the utility model is used, it is only for convenience of describing the present invention and simplifying the description, but it is not necessary to indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation and be operated, and thus, it should not be construed as limiting the present invention.

Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.

Fig. 1 is a schematic view of the overall structure of a papillary sphincter incision knife 10 provided in this embodiment, fig. 2 is a schematic view of a cross-sectional structure of a multi-lumen tube 100 provided in this embodiment, fig. 3 is a schematic view of a cross-sectional structure at the distal end of the multi-lumen tube 100 provided in this embodiment, and fig. 4 is a schematic view of a cross-sectional structure at a communication hole 116 in the multi-lumen tube 100 provided in this embodiment. Referring to fig. 1-4 in combination, the present embodiment provides a multi-lumen tube 100 and, accordingly, a papillary sphincter incision knife 10.

The teat sphincter cutter 10 includes a multi-lumen tube 100, while the teat sphincter cutter 10 further includes a guide wire connector 210, an operating handle 230, and a cutting wire assembly 240. The distal end of the guide wire adapter 210 is connected to the multi-lumen tube 100 and an operating handle 230 is connected to the distal end of the guide wire adapter 210. The multi-lumen tube 100 has a filament-cutting channel 111 therein, a filament-cutting assembly 240 is inserted into the filament-cutting channel 111, and a distal end of the filament-cutting assembly 240 is connected to the operating handle 230, so that the filament-cutting assembly 240 is operated by the operating handle 230.

It should be noted that, in the description of the present embodiment, the "distal end" of a certain component is an end relatively close to the inside of the human body during operation, and correspondingly, the "proximal end" of a certain component is an end relatively far from the inside of the human body during operation. Meanwhile, when the papillary sphincter opening knife 10 is operated, the operation handle 230 is located outside the human body, and the end of the multi-lumen tube 100 away from the operation handle 230 is located inside the human body, i.e., the distal end of a certain component can be regarded as the end relatively away from the operation handle 230, and the proximal end of a certain component can be regarded as the end relatively close to the operation handle 230.

Fig. 5 is a schematic structural view of the nipple sphincter incision knife 10 provided in this embodiment at the guide wire joint 210. Referring to fig. 1 to 5, specifically, a first metal catheter 211 is disposed at a distal end of the guide wire connector 210, a lateral surface of the guide wire lumen 113 corresponding to the guide wire connector 210 is provided with a slot, which is a first slot 131, and the distal end of the first metal catheter 211 is inserted into the guide wire lumen 113 through the first slot 131, so that a guide wire (not shown) at the guide wire connector 210 passes through the first metal catheter 211 to extend into the guide wire lumen 113 and extend along the guide wire lumen 113.

Further, the papillary sphincter incision knife 10 further comprises a liquid injection connector 220, the proximal end of the multi-cavity tube 100 passes through the guide wire connector 210 and is connected with the distal end of the liquid injection connector 220, and the proximal end of the liquid injection connector 220 is connected with the operation handle 230, i.e. the operation handle 230 is connected with the distal end of the guide wire connector 210 through the liquid injection connector 220. The filling connector 220 communicates with at least a portion of the functional channels 114 to fill the corresponding functional channels 114 with liquid through the filling connector 220. Obviously, the part of the plurality of functional channels 114 communicated with the injection connector 220 is used as the injection channel 115 for injecting the contrast medium into the human body. It is understood that in other embodiments, aspiration of bile may also be performed through the functional lumen 114.

Fig. 6 is a schematic structural view of the liquid injection joint 220 in the teat sphincter incision knife 10 according to this embodiment. Referring to fig. 1-6, in particular, the proximal side of the injection channel 115 of the multi-lumen tube 100 is provided with a groove, which is a second groove 132. The distal end of the liquid injection connector 220 is provided with a second metal conduit 221, and the distal end of the second metal conduit 221 is inserted into the through hole through the second groove 132, so that the communication between the liquid injection connector 220 and the liquid injection channel 115 is realized through the through hole.

Further, the operation handle 230 includes an electrode holder (not shown), a joint, a finger ring 232, and a stem 231. The core bar 231 is connected with the liquid injection connector 220 through a connector, and the finger ring 232 is sleeved on the core bar 231 and can slide along the core bar 231. The filament cutting assembly 240 is rigidly connected to the finger ring 232 via the electrode holder, such that the movement of the filament cutting assembly 240 is controlled by the sliding movement of the finger ring 232 relative to the stem 231.

Further, the distal end of the filament-cutting cavity 111 is closed at the distal end of the tube 110, and the tube 110 has a filament-cutting inlet 112 and a filament-cutting outlet respectively communicated with the filament-cutting cavity 111, and the filament-cutting inlet 112 and the filament-cutting outlet both penetrate through the outer circumferential surface of the tube 110, so that the filament-cutting assembly 240 in the filament-cutting cavity 111 can penetrate out of the tube 110 from the filament-cutting outlet, and after penetrating out of the tube 110, the filament-cutting assembly 240 can penetrate back to the filament-cutting cavity 111 from the filament-cutting inlet 112, so that the position of the filament-cutting assembly 240 between the filament-cutting outlet and the filament-cutting inlet 112 is located outside the tube 110 for cutting.

Specifically, the filament inlet 112 and the filament outlet are sequentially disposed along a distal end to a proximal end of the tube 110, i.e., the filament inlet 112 is disposed near the distal end of the tube 110 relative to the filament outlet, and the filament inlet 112 is disposed far from the distal end of the tube 110 relative to the communication hole 116, i.e., the filament inlet 112 and the filament outlet are both disposed far from the distal end of the tube 110 relative to the communication hole 116.

Further, the multi-lumen tube 100 further includes a connection tube 120 disposed at a distal end of the filament-cutting lumen 111, and a distal end of the filament-cutting assembly 240 passing back from the filament-cutting inlet 112 to the filament-cutting lumen 111 is connected to the connection tube 120, so that the distal end of the filament-cutting assembly 240 is fixed by the connection tube 120.

Referring to fig. 1-4 again, in the present embodiment, the multi-lumen tube 100 includes a tube body 110, a guide wire lumen 113 and at least one functional lumen 114 are provided in the tube body 110, at the distal end of the tube body 110, the at least one functional lumen 114 is communicated with the guide wire lumen 113 through a communication hole 116 corresponding to the at least one functional lumen 114, so that the penetration requirement of the guide wire lumen 113 and the at least one functional lumen 114 is satisfied by one lumen at the distal end of the tube body 110, the one lumen is a fusion lumen 117, in other words, the fusion lumen 117 can be regarded as formed by fusing the guide wire lumen 113 and the at least one functional lumen 114, that is, the fusion lumen 117 is provided at one end side of the guide wire lumen 113 located at the communication position of the guide wire lumen 113 and the communication hole 116. Also, the fusion lumen 117 can be considered to be the portion of the guidewire lumen 113 at the distal end of the tube 110.

Specifically, at least one of the at least one functional channel 114 is a liquid injection channel 115, and the communication hole 116 corresponding to the liquid injection channel 115 is a liquid injection hole. The injection channel 115 is communicated with the injection connector 220, and the contrast agent is injected into the injection channel 115 from the injection connector 220, flows along the injection channel 115, enters the fusion channel 117 through the injection hole, and then flows out of the multi-cavity tube 100. By fusing the injection lumen 115 with the guide wire lumen 113, it is advantageous to ensure that the contrast agent enters the fusion lumen 117 and enters the body through the fusion lumen 117.

In the present embodiment, the number of functional channels 114 is two, and the multi-lumen tube 100 is a four-lumen tube, such that there are four holes in the cross-sectional configuration of the multi-lumen tube 100 as shown in FIG. 2. Optionally, both the two functional channels 114 are the liquid injection channels 115, and accordingly, the liquid injection connector 220 has two second metal conduits 221, and the two second metal conduits 221 are respectively inserted into the two liquid injection channels 115 to supply liquid to the two liquid injection channels 115 (as shown in fig. 7). The fusion lumen 117 is required to accommodate both guidewire and contrast agent passage. Meanwhile, the number of the communication holes 116 is two, and the two communication holes 116 are respectively communicated with the two liquid injection channels 115, so that the two liquid injection channels are communicated with the guide wire channel 113. Thus, both the communication holes 116 are injection holes, and the two communication holes 116 are located at substantially the same axial position of the tubular body 110. It will be appreciated that in other embodiments, the number and function of the functional channels 114 may be specifically configured as desired.

It should be noted that in this embodiment, both the functional channels 114 are used as the liquid injection channels 115, that is, in this embodiment, the functional channels 114 and the liquid injection channels 115 can be regarded as equivalent, and similarly, both the communication holes 116 are liquid injection holes, that is, in this embodiment, the communication holes 116 and the liquid injection holes can be regarded as equivalent.

FIG. 8 is a schematic cross-sectional view of the fusion channel 117 of the multi-lumen tube 100 according to the present embodiment. Referring to fig. 2 and 8, in the present embodiment, the cross-sectional area of the guide wire lumen 113 is larger than the cross-sectional area of the functional lumen 114 and the cross-sectional area of the cutting wire lumen 111, and the cross-sectional area of the guide wire lumen 113 is substantially equal to the cross-sectional area of the fusion lumen 117. Further, the outer diameter at the distal end of the tube body 110 is 4F-5.5F, i.e., the minimum outer diameter of the insertion portion of the fusion lumen 117 is 4F-5.5F. Optionally, the distal end of the tube body 110 has an outer diameter of 4F, 4.5F, 5F, or 5.5F. Where F (i.e., French) is the unit of catheter, e.g., 4F represents the diameter of a catheter with a circumference of 4 mm. In the description of the present embodiment, the "sectional area" refers to an area taken perpendicular to a plane of the flow path. Alternatively, the functional channel 114 may have a diameter dimension of 0.5mm to 0.7mm, which may be 0.5mm, 0.6mm, or 0.7mm, or other values between 0.5mm to 0.7 mm.

Further, the sectional area of the liquid injection hole is larger than or equal to the sectional area of the liquid injection channel 115, so that the pressure of the contrast agent cannot be increased in the process that the developing agent flows from the liquid injection channel 115 to the fusion channel 117 through the liquid injection hole, the liquid injection is easier, and the liquid injection effect is better.

Optionally, the cross-sectional area of the liquid injection hole is S1, the cross-sectional area of the liquid injection channel 115 is S2, and S1 is not less than 1.5S2, so as to reduce the liquid resistance. Alternatively, the liquid injection hole (i.e., the communication hole 116) is a strip-shaped hole extending in the axial direction of the liquid injection channel 115 (i.e., the functional channel 114), the flow cross-section of which is rectangular (as shown in FIG. 3), and the length direction of the rectangle extends in the axial direction of the liquid injection channel 115. It is understood that in other embodiments, the cross-sectional shape of the liquid injection hole may be specifically set according to requirements, for example, the cross-sectional shape is set to be circular.

Further, the distance between the distal end of the communication hole 116 and the distal end face of the tube body 110 is D, and D is not less than 3mm and not more than 5 mm. Alternatively, in some embodiments, D is 3mm, 4mm or 5mm, and it is understood that in other embodiments, the distance between the distal end of the communication hole 116 and the distal end surface of the tube 110 may take other values between 3mm and 5 mm. Alternatively, the communication hole 116 communicates with the guide wire channel 113 in the radial direction of the corresponding function channel 114, so that the axial position of the communication hole 116 where it communicates with the function channel 114 and the axial position of the communication hole 116 where it communicates with the guide wire channel 113 are the same.

Referring to fig. 1 and 3, in the present embodiment, the distal end of the tube 110 has a frustum-shaped structure 119 with an outer diameter gradually decreasing from the proximal end of the tube 110 to the distal end of the tube 110, so that the radial dimension of the distal end of the tube 110 is smaller at the position closer to the distal end surface, which facilitates the entry of the distal end of the tube 110 into the nipple. Specifically, the frustum-shaped structure 119 is a truncated cone-shaped structure 119. Further, the distal end of the filament-cutting cavity 111 is located at the proximal end side of the frustum-shaped structure 119, i.e. the distance from the distal end of the filament-cutting cavity 111 to the distal end face of the tube body 110 is greater than the distance from the frustum-shaped structure 119 to the distal end face of the tube body 110.

Further, the angle α between the axis of the fusion lumen 117 and the axis of the guide wire lumen 113 is obtuse, while the axis of the guide wire lumen 113 is arranged parallel to the axis of the multi-lumen tube 100, i.e. the axis of the fusion lumen 117 is arranged obliquely to the axis of the multi-lumen tube 100. By arranging the fusion channel 117 to be inclined, the formed frustum-shaped distal end can be effectively ensured not to be damaged in any direction, the distal end of the frustum-shaped structure 119 can be formed, and the structural reliability of the distal end of the multi-lumen tube 100 can be ensured. Specifically, the fusion lumen 117 is obliquely disposed toward the axis extension of the filament-cutting lumen 111, i.e., the distance between the fusion lumen 117 and the axis extension of the filament-cutting lumen 111 gradually decreases in the proximal to distal direction of the tube body 110.

Further, smooth transition is carried out between the distal end face of the frustum-shaped structure 119 and the circumferential surface of the frustum-shaped structure 119 through fillets, so that the problem that the distal end of the multi-lumen tube 100 is damaged after entering the nipple is solved, and the insertion of the distal end of the multi-lumen tube 100 into the nipple is facilitated. Specifically, the distal end of the multi-lumen tube 100 is thermoformed to form a frustoconical structure 119 with rounded corners.

Referring to fig. 2 and fig. 4 again, in the present embodiment, the two functional channels 114 are symmetrically distributed on two sides of the connection line between the cutting channel 111 and the guide channel 113, that is, taking the cross-sectional structure of the multi-lumen tube 100 shown in fig. 2 as an example, the connection line between the axis of the cutting channel 111 and the axis of the guide channel 113 is taken as a symmetry axis 118, and the two functional channels 114 are symmetrically distributed on two sides of the symmetry axis 118.

Currently, before intubation, the duodenoscope (or other endoscope) needs to be adjusted to place the axis of the nipple in the direction of 11 points in the visual field, so that the papilla sphincter opening knife 10 needs to be oriented in the direction of 11 points to facilitate insertion of the nipple. In order to make the papillary sphincter opening knife 10 better appear in the 11 o 'clock direction, the forceps-raising device (not shown) for the duodenum is configured in a slope structure with the left side higher and the right side lower, so that the slope structure bends the papillary sphincter opening knife 10 to the lens side, namely, to the vicinity of the 11 o' clock direction of the visual field during the process of raising the forceps, however, during the operation, especially when touching the papilla, the blade is very easy to deflect to one side due to the peristalsis of the stomach and the intestinal tract, and the stable blade direction cannot be obtained. The functional cavity channels 114 are symmetrically arranged on two sides of a symmetrical shaft 118 formed by connecting the axis of the wire cutting cavity channel 111 and the axis of the wire guiding cavity channel 113, so that the deflection of the direction of the cutter head can be effectively improved, and when the multi-cavity tube 100 extends out of the duodenoscope, a stable 11-point direction can be obtained under the action of a forceps lifting device, and the subsequent operation is convenient.

It should be noted that, in the present embodiment, the multi-lumen tube 100 is designed to have four lumens, the number of the functional lumens 114 is two, and both the two functional lumens 114 are used as the liquid injection lumens 115, it can be understood that, in other embodiments, the number of the functional lumens 114 may be set to be other even numbers greater than 2 according to requirements, for example, the number of the functional lumens 114 is set to be four, the four functional lumens 114 are symmetrically distributed on two sides of the symmetry axis 118, and only part of the four functional lumens 114 is set as the liquid injection lumens 115.

According to the papillary sphincter cutting knife 10 provided in this embodiment, the operation principle of the papillary sphincter cutting knife 10 is as follows:

in use, the multi-lumen tube 100 is advanced through the endoscope into the body and the distal end of the tube body 110 is advanced into the nipple, and then a guide wire is implanted into the bile duct. After the guide wire is successfully placed, contrast agent is injected into the injection cavity 115 through the injection connector 220, flows into the fusion cavity 117 and flows out of the distal end of the tube body 110, and therefore the size and the position of the calculus can be judged under X-ray shooting. After the above operation is completed, the distal end of the shredding assembly 240 is placed into the nipple, the shredding assembly 240 is operated by the operating handle 230 to be tensioned into an arch shape, and the shredding assembly 240 is adjusted along the nipple opening 11 o' clock direction by adjusting the tightness of the shredding assembly 240, and by using the combined adjustment of the forceps lifting device of the endoscope and the left-handed endoscope body, so as to obtain a safe incision and reduce the risk of perforation. Finally, the cutting assembly 240 slowly cuts the top of the nipple by pulsing and cuts the nipple sphincter to the size of the incision desired.

The present embodiment provides a multi-lumen tube 100 having at least the following advantages:

embodiments of the present invention provide a multi-lumen tube 100 that effectively reduces the size of the distal end of the tube body 110, facilitates the access to the nipple, and is more convenient to operate by providing a distal structure of the tube body 110 and providing a structure in which the functional lumen 114 is merged with the guide wire lumen 113. And at least part of the functional cavity channel 114 is the liquid injection cavity channel 115, namely, the far end of the liquid injection cavity channel 115 is fused with the guide wire cavity channel 113, so that after the far end of the tube body 110 is reduced, enough flow area is provided for the flowing of the contrast medium, the flow is ensured, the liquid pressure is reduced, the liquid injection is convenient, and the damage of the liquid to the human body is reduced.

The functional channels 114 are arranged in an even number, and the even number of functional channels 114 are symmetrically distributed on two sides of a connecting line of the axis of the cutting channel 111 and the axis of the guide wire channel 113, so that a symmetrical multi-cavity structure is formed. The effect of the forceps-lifter can help the multilumen tubing 100 to obtain a stable 11-point orientation.

The present embodiment also provides a teat sphincter opening knife 10 comprising the multi-lumen tube 100 described above. Since the papillary sphincter opening knife 10 includes the multi-lumen tube 100 described above, it also has all the advantageous effects of the multi-lumen tube 100.

The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (15)

1. A multi-lumen tube for a papillary sphincter opening knife (10), wherein the multi-lumen tube (100) comprises a tube body (110), a guide wire lumen (113), at least one functional lumen (114) and at least one communication hole (116) are arranged in the tube body (110), and the at least one functional lumen (114) and the at least one communication hole (116) are arranged in a one-to-one correspondence; at the far end of the tube body (110), at least one functional cavity (114) is communicated with the guide wire cavity (113) through the corresponding communication hole (116);

wherein a distal outer diameter dimension of the tube (110) is less than a proximal outer diameter dimension of the tube (110).

2. The multi-lumen tube of claim 1, wherein the distal end of the tube (110) is in a frustoconical configuration (119) having a decreasing outer diameter from the proximal end of the tube (110) to the distal end of the tube (110).

3. Multi-lumen tube according to claim 2, wherein the distal end face of the frustoconical structure (119) and the circumferential surface of the frustoconical structure (119) are smoothly transitioned by rounded corners.

4. Multi-lumen tube according to claim 2, wherein the tube body (110) has a distally closed filament-cutting lumen (111) therein, the distal end of the filament-cutting lumen (111) being located on the proximal side of the frustum-shaped structure (119).

5. A multi-lumen tube according to claim 2, wherein the distal side of the guide wire lumen (113) at the communication of the guide wire lumen (113) with the communication hole (116) has a fusion lumen (117), and the axis of the fusion lumen (117) forms an obtuse angle with the axis of the guide wire lumen (113).

6. Multi-lumen tube according to claim 1, wherein at least one of the at least one functional channel (114) is a liquid injection channel (115), and the communication hole (116) corresponding to the liquid injection channel (115) is a liquid injection hole having a sectional area greater than or equal to a sectional area of the liquid injection channel (115).

7. The multi-lumen tube as set forth in claim 6, wherein the injection hole has a sectional area of S1, the injection channel (115) has a sectional area of S2, and S1 is not less than 1.5S 2.

8. The multi-lumen tube according to claim 1, wherein the number of the functional lumens (114) is an even number equal to or greater than 2, and a plurality of the functional lumens (114) are provided in the multi-lumen tube (100), and are symmetrically distributed about a line connecting an axial center of the filament lumen (111) and an axial center of the guide wire lumen (113) in a cross section of the multi-lumen tube (100).

9. The multi-lumen tube according to claim 8, wherein the distal end of the filament-cutting lumen (111) is closed, and the tube (110) has a filament-cutting inlet (112) and a filament-cutting outlet respectively communicating with the filament-cutting lumen (111), and the filament-cutting inlet (112) and the filament-cutting outlet are both disposed through the outer circumferential surface of the tube (110), the filament-cutting outlet is used for allowing a filament-cutting assembly (240) in the filament-cutting lumen (111) to pass out of the tube (110), and the filament-cutting inlet (112) is used for allowing the filament-cutting assembly (240) passing out of the tube (110) to pass back into the filament-cutting lumen (111).

10. The multi-lumen tube of claim 9, wherein a distal end of the wire cutting lumen (111) is further provided with a connecting tube (120), the connecting tube (120) being adapted to connect with a distal end of the wire cutting assembly (240).

11. A multi-lumen tube according to claim 1, wherein the communication holes (116) are strip-shaped holes extending in the axial direction of the functional lumen (114).

12. A multi-lumen tube according to any of claims 1-11, wherein the distance between the distal end of the communication hole (116) and the distal end face of the tubular body (110) is D, 3mm ≦ D ≦ 5 mm.

13. The multilumen tubing according to claim 12, wherein the communication holes (116) communicate with the guide wire lumen (113) in a radial direction of the corresponding functional lumen (114).

14. A teat sphincter incision knife, characterized in that the teat sphincter incision knife (10) comprises a guide wire connector (210), an operating handle (230), a guide wire assembly (240) and a multi-lumen tube (100) according to any of claims 1-13; the distal end of the guide wire connector (210) is connected with the multi-lumen tube (100), and the operating handle (230) is connected with the distal end of the guide wire connector (210); the cutting wire assembly (240) penetrates through the cutting wire cavity (111) of the multi-cavity tube (100) and is connected with the operating handle (230) so as to operate the cutting wire assembly (240) through the operating handle (230).

15. The papillary sphincter incision knife according to claim 14, wherein the papillary sphincter incision knife (10) further comprises a liquid injection joint (220), the proximal end of the multi-cavity tube (100) passes through the guide wire joint (210) to be connected with the distal end of the liquid injection joint (220), the operating handle (230) is connected with the proximal end of the liquid injection joint (220), and the liquid injection joint (220) is communicated with at least part of the functional cavity channels (114) to inject liquid into the corresponding functional cavity channels (114) through the liquid injection joint (220).

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