CN210125091U - Biliary tract drainage tube - Google Patents

Abstract

The application provides a biliary tract drainage tube, including pipe, bile storage bag and connector components. The catheter is communicated with the bile storage bag through the connector assembly, so that bile in the biliary tract can be drained out of the body through the drainage cavity in the catheter and stored in the bile storage bag; when the bile needs to be reinjected, the bile flows back to the intestinal tract through the backflow cavity in the catheter to participate in digestion. The pipe is through placing drainage chamber and backward flow intracavity in same pipeline to through bile collecting hole and bile release hole on the different positions, independently carry out the collection and the release of bile, thereby be convenient for put into the patient with the pipe internal. Moreover, the nasal cavity of the patient can be conveniently passed through, and the problem that the traditional drainage tube is not convenient to put into the body of the patient is solved.

Description

Biliary tract drainage tube

Technical Field

The application relates to the technical field of medical equipment, in particular to a biliary tract drainage tube.

Background

Biliary drainage tubes are common bile drainage instruments used in ERCP surgery (endoscopic retrograde cholangiopancreatography). During operation, on one hand, the biliary tract drainage tube is arranged at a preset position in the biliary tract of a patient through a duodenoscope; on the other hand, the biliary tract drainage tube is extended to the outside of the patient body through the nasal cavity of the patient or directly through tissues so as to drain bile at an obstruction part or a pathological change part in the bile duct and relieve biliary tract pressure.

The existing biliary tract drainage tubes are divided into three types, one is an external drainage tube, namely bile is drained from the biliary tract to the outside of the body through a drainage pipeline; the second is an internal drainage tube, namely bile is drained from the biliary tract to the intestinal tract through the drainage tube, so that the bile participates in the food digestion process in the intestinal tract; the third is an internal and external drainage tube, also called as a 'drainage-reinfusion tube', which drains bile out of the body from the biliary tract through a drainage tube and then reinfuses the bile to the intestinal tract. The outer drainage tube is directly abandoned after the bile is drained out of the body, and the bile cannot enter the intestinal tract to influence the digestion process. The internal drainage tube directly drains bile into the intestinal tract, which is not beneficial to the pressure control of the biliary tract and is not in accordance with the normal physiological digestion process. Therefore, the bile loss can be reduced, and the bile flows to the internal and external drainage tubes which accord with the normal digestive process, thereby having more use value in clinic.

Fig. 1 shows a typical internal and external drainage tube including a drainage tube a1 for draining bile to the outside of the body and a return tube a2 for returning bile into the intestinal tract. The drainage tube a1 and the return tube a2 are separate conduits and can be distributed side by side or in a nested manner of inner and outer tubes. The drainage tube a1 and the return tube a2 are at the far end near the biliary tract and the near end at the other end. The proximal ends of the drainage tube a1 and the return tube a2 are provided with a connector a3 for connecting a bile storage bag.

Wherein, the proximal ends of the two tubes of the drainage tube a1 and the return tube a2 need to be led out of the body through the nasal cavity, the distal end of the drainage tube a1 needs to enter the inside of the biliary tract, and the distal end of the return tube a2 needs to enter the inside of the intestinal tract. Therefore, the split catheter is not convenient to place in a patient body because medical staff needs to operate two tubes simultaneously in the ERCP operation process. In addition, the proximal ends of the drainage tube a1 and the return tube a2 are respectively provided with two connectors a3, which is inconvenient for passing through the narrow nasal cavity space of the patient and further hinders the placement in the patient.

SUMMERY OF THE UTILITY MODEL

The application provides a biliary tract drainage tube to solve traditional biliary tract drainage tube and need concurrent operation drainage tube and back flow, be not convenient for put into the internal problem of patient.

The application provides a biliary tract drainage tube, includes: the device comprises a catheter and a joint component, wherein the catheter is used for draining and reinjecting bile; a connector assembly removably connected to the nasal end of the catheter; the catheter is an integrated double-cavity tube;

a drainage cavity and a reflux cavity which are mutually isolated are arranged in the catheter; a bile collecting hole communicated with the drainage cavity is formed in the tube wall of the catheter close to the biliary tract end; a bile release hole communicated with the reflux cavity is also formed in the tube wall of the catheter; the bile collecting hole and the bile releasing hole are arranged at intervals.

Optionally, the end part of the backflow cavity, which is located at the bile duct end of the catheter, is of a closed structure, so that bile is prevented from entering the backflow cavity through the end part of the backflow cavity.

Optionally, the part of the catheter close to the biliary tract end is shaped into a curved structure to adapt to the shape of the biliary tract.

Optionally, the biliary tract drainage tube further comprises a bile storage bag for storing bile drained from the biliary tract; the bile storage bag is connected to the catheter by the connector assembly.

Optionally, the connector assembly comprises a return connector and a drainage connector connected in series to the catheter;

the backflow connector is communicated with the backflow cavity, and the drainage connector is communicated with the drainage cavity so as to provide different bile flow directions when bile drainage and backflow are carried out.

Optionally, the backflow joint comprises a backflow joint main body of a three-way structure and two first sealing nuts screwed at two ends of the drainage joint main body;

the guide pipe penetrates through the backflow connector main body, and an inner cavity of the backflow connector main body is communicated with the backflow cavity; a first sealing ring which is respectively contacted with the two first sealing nuts is arranged in the backflow connector main body.

Optionally, the backflow connector further comprises a backflow port and an injector, and the backflow port and the backflow connector main body are of an integrated structure; the backward flow mouth is through annotating liquid ware intercommunication bile storage bag to with bile in the bile storage bag is extracted extremely the inner chamber of backward flow joint main part.

Optionally, the drainage connector comprises a drainage connector body and a second sealing nut screwed at one end of the drainage connector body;

the drainage connector main body is connected with a bile storage bag; the guide pipe penetrates through the drainage joint main body, and a second sealing ring close to the second sealing nut is arranged in the drainage joint main body.

Optionally, a partition plate is arranged inside the conduit; the division board will the inner chamber of pipe is kept apart into drainage chamber and backward flow chamber makes the cross sectional area in drainage chamber is less than or equal to the cross sectional area in backward flow chamber.

Optionally, a plurality of bile collecting holes are formed in the tube wall of the duct close to the biliary tract end, so that bile in the biliary tract is collected at an accelerated speed, and biliary tract pressure is relieved.

According to the technical scheme, the biliary tract drainage tube comprises a catheter, a bile storage bag and a connector assembly. The pipe passes through joint Assembly intercommunication bile storage bag, makes the bile in the biliary tract can pass through the drainage chamber in the pipe, and the drainage is external, stores in the bile storage bag. When bile needs to be reinjected, the bile can flow back to the intestinal tract through the backflow cavity in the catheter to participate in food digestion in the intestinal tract. The pipe is through placing drainage chamber and backward flow intracavity in same pipeline to through bile collecting hole and bile release hole on the different positions, independently carry out the collection and the release of bile, thereby be convenient for put into the patient with the pipe internal. In addition, through the dismantled relation of connection between pipe and bile storage bag and the connector components, can pull down bile storage bag and connector components when passing through the patient nasal cavity to through the patient nasal cavity, solve traditional drainage tube and be not convenient for put into the internal problem of patient.

Drawings

In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of a typical internal and external draft tube configuration;

FIG. 2 is a schematic structural view of a biliary tract drainage tube according to the present application;

FIG. 3 is a schematic cross-sectional view of a catheter according to the present application;

FIG. 4 is a schematic view of the overall construction of a catheter according to the present application;

FIG. 5 is a schematic cross-sectional view of a return coupling according to the present application;

FIG. 6 is a schematic cross-sectional view of a drainage connector of the present application;

FIG. 7 is a schematic view showing the mounting structure of the injector according to the present invention.

Detailed Description

Reference will now be made in detail to embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following examples do not represent all embodiments consistent with the present application. But merely as exemplifications of systems and methods consistent with certain aspects of the application, as recited in the claims.

As shown in fig. 2 and 3, the biliary tract drainage tube provided by the present application includes: a bile storage bag 1, a catheter 2 and a connector assembly 3. Wherein, bile storage bag 1 is used for the storage to follow the bile of biliary tract drainage, and bile storage bag 1 can be the seal bag of plastics material, can set up the detachable connection structure who is used for intercommunication pipe 2 or joint Assembly 3 on bile storage bag 1, for example, screwed pipe, elastic card cover etc. so that install bile storage bag 1 on pipe 2 fast. The present application is not limited to the specific shape of the bile storage bag 1, but in some embodiments of the present application, the bile storage bag 1 may be provided with a backflow port on the bag body. For example, a through hole for backflow is formed in a side wall of the bile storage bag 1, so that when bile backflow is required, bile in the bile storage bag 1 can be extracted from the through hole and refilled into the intestinal tract of a patient.

The catheter 2 is used for draining and reinjecting bile. In clinic, one end of the catheter 2 is placed in the biliary tract of a patient, the other end of the catheter is led out of the body through the nasal cavity of the patient, and the bile storage bag 1 is communicated with the outside of the body. In the clinic, the end of the catheter 2 leading out of the patient is defined as the nasal cavity end 201, and the end placed in the biliary tract of the patient is defined as the biliary tract end 202. Obviously, the nasal cavity end 201 and the biliary tract end 202 are only used for convenience of describing the scheme structure, and do not limit the structure of the biliary tract drainage tube provided by the present application. In practical applications, which end is the nasal cavity end 201 and which end is the biliary tract end 202 should be distinguished according to the usage environment and the specific structure.

In order to drain and reinject bile of a patient, the catheter 2 provided by the application is an integrated double-cavity tube, namely, a drainage cavity 21 and a reflux cavity 22 which are isolated from each other are arranged inside the catheter 2. Wherein the drainage lumen 21 is used to guide bile flowing into the catheter 2 into the bile storage bag 1. The return lumen 22 is used to guide the bile in the bile storage bag 1 to flow into the patient's intestine. In this application, to achieve the dual lumen tubing configuration described above, the catheter 2 may be provided with an additional spacer 25 within the lumen of the tubing, as shown in FIG. 3. That is, the partition plate 25 partitions the inner cavity of the catheter 2 into the drainage lumen 21 and the return lumen 22.

It can be seen that in the solution provided in the present application, the whole catheter 2 may be composed of a continuous circular tube with the same diameter, and each position of the catheter 2 is divided into two cavities, namely the drainage cavity 21 and the return cavity 22, by the partition plate 25. Obviously, in the present application, the catheter 2 is not limited to the above-described structure, and a double lumen tube with a drainage lumen 21 and a return lumen 22 may be constructed by enclosing two separate tubes; alternatively, the catheter 2 is implemented to have a double lumen structure by a cannula structure to drain and reflux bile, respectively, but is somewhat troublesome when it is placed in a patient.

The wall of the duct 2 near the biliary tract end 202 is provided with a bile collecting hole 23 communicated with the drainage cavity 21. In practical application, the bile collecting hole 23 is a through hole formed on one side of the drainage cavity 21 of the catheter 2 and is used for collecting bile in the biliary tract. Because the pressure in the biliary tract is higher than the external environment, the bile in the biliary tract can smoothly enter the drainage cavity 21 through the bile collecting hole 23 under the action of the pressure in the gall bladder of the patient, and forms a continuous liquid flow under the driving of the pressure in the gall bladder so as to enter the bile storage bag 1.

Further, as shown in fig. 4, a plurality of bile collecting holes 23 may be disposed on the wall of the catheter 2 near the biliary tract end 202 to accelerate the collection of bile in the biliary tract and relieve the biliary tract pressure. In practical application, after the duct 2 is placed in the biliary tract, a part of the duct 2 can be extended in the biliary tract, and the duct 2 corresponding to the extended part can be wrapped by bile in the biliary tract, so that the flow rate of the bile entering the drainage cavity 21 can be increased by increasing the number of the bile collecting holes 23 on the duct 2 extending into the biliary tract, thereby improving the collection efficiency of the bile and rapidly relieving the pressure of the biliary tract.

It should be noted that, in this application, can improve bile collection speed through set up a plurality of bile collection holes 23 on the pipe wall of pipe 2, but the number of bile collection holes 23 on pipe 2 should not too much yet to reduce the impurity in the alimentary canal and pass through bile collection holes 23 and get into drainage chamber 21, avoid blockking up drainage chamber 21 or polluting the external bile of drainage. Therefore, the number of the bile collecting holes 23 on the catheter 2 may range from 1 to 10, and preferably, the number of the bile collecting holes 23 is 5.

In addition, do not do the restriction to the aperture of bile collecting hole 23 in this application, can select bile collecting hole 23 of different aperture sizes according to different patient's biliary tract characteristics and the different positions and the degree of biliary tract operation in the clinical environment. In the case of multiple bile collection orifices 23, the diameters of the multiple bile collection orifices 23 may also be varied to accommodate pressure at different locations in the biliary tract. For example, the diameter of the bile collecting hole 23 may be sequentially increased from a direction gradually approaching the biliary end 202 of the catheter 2, so that the pressure of bile in the catheter 2 tends to be uniform.

The tube wall of the conduit 2 is also provided with a bile release hole 24 communicated with the return cavity 22. The bile discharge hole 24 should be opened on the wall of the catheter 2 at one side of the return lumen 22. In clinic, when bile refilling is required, bile in the reflux cavity 22 can be released into the intestinal tract of a patient through the bile release hole 24. In order to make the bile flowing out from the bile releasing hole 24 participate in the normal digestive process of the patient, the bile collecting hole 23 and the bile releasing hole 24 should be arranged at an interval, that is, the opening position of the bile releasing hole 24 on the conduit 2 is a position corresponding to the intestinal tract, that is, a position of duodenum which is about 10cm away from the stomach of the patient.

It can be seen that in the technical scheme that this application provided, through the integral type double-chamber structure of pipe 2, can guarantee that 2 external structures of pipe present the pipe form to operating personnel puts into patient's internally through the alimentary canal smoothly with pipe 2. The inner part of the catheter 2 is divided into two independent cavities, namely a drainage cavity 21 and a return cavity 22, by a separation plate 25. Not only can satisfy two kinds of demands of drainage and reinjection respectively, can make pipe 2 when not punching moreover, each part's structure all is the same, the production and processing of being convenient for. In actual production, the catheter 2 can be independently processed through a mold, and the length of the catheter 2 can be flexibly adjusted according to the characteristics of digestive tracts of different patients.

In this application, the connector assembly 3 is used as an important component of the biliary drainage tube, and is mainly used for connecting the catheter 2 and the bile storage bag 1, and for returning bile in the bile storage bag 1 to the return cavity 22 of the catheter 2. To facilitate the placement of the catheter 2 into the patient and through the nasal cavity of the patient, in this application, the catheter 2 is detachably connected to the bile storage bag 1 and the connector assembly 3.

Illustratively, the conduit 2 removably connects the fitting assembly 3 including: the connector assembly 3 is detachably connected to the nasal cavity end 201 of the catheter 2, so that the connector assembly 3 is detachably connected to the bile storage bag 1 through the connection between the catheter 2 and the bile storage bag 1. The joint component 3 can be detached from the catheter 2 when the whole drainage tube is placed into a patient, and the catheter 2 is of a tubular structure, so that the operation is more flexible when the drainage tube is placed into the patient, and the nasal cavity of the patient is convenient to pass through. In the technical scheme that this application provided, connector assembly 3 is together with bile storage bag 1, connects the one end at pipe 2, when needs are dismantled, can easily dismantle connector assembly 3 from pipe 2. The specific detachable connection mode can be as follows: the connection of the joint assembly 3 and the conduit 2 is realized by means of threaded connection, snap connection, tight-fit connection and the like.

In the technical scheme provided by the application, the joint component 3 has two functions of connecting and completing bile reinjection. Thus, to achieve the above-described function, the connector assembly 3 may further include a return connector 31 and a drain connector 32 connected in series to the catheter 2, as shown in fig. 2. Wherein, the drainage connector 32 communicates with the drainage cavity 21, and the backflow connector 31 communicates with the backflow cavity 22, so as to provide different bile flow directions when bile drainage and backflow are performed. To facilitate placement of the bile storage bag 1, the drainage connector 32 may be placed closer to the nasal end 201 to communicate the catheter 2 directly into the bile storage bag 1. The drainage connector 32 is located between the return connector 31 and the bile storage bag 1. The backflow connector 31 is communicated with the backflow cavity 22 to inject bile in the bile storage bag 1 into the backflow cavity 22.

In order to perform bile backflow, as shown in fig. 5, the backflow joint 31 includes a backflow joint body 311 of a three-way structure, and two first gland nuts 312 screwed at both ends of the backflow joint body 311. The inner cavity of the return connector body 311 communicates with the return chamber 22. In practice, the conduit 2 extends through the return fitting body 311. A through hole for reflux may be opened in a pipe wall of a portion of the catheter 2 passing through the reflux joint main body 311 so that the inner cavity of the reflux joint main body 311 can communicate with the reflux cavity 22. In order to prevent bile from leaking from both sides of the return joint body 311, first seal rings 313 contacting the two first seal nuts 312 are further provided in the return joint body 311.

In this embodiment, the first sealing ring 313 is a circular ring structure made of a soft material, such as foam plastic. The first sealing ring 313 may be pre-sleeved on the conduit 2 or pre-placed on the main body 311 of the backflow connector when the sealing effect needs to be ensured. The first sealing ring 313 ensures that the inner ring is tightly contacted and matched with the catheter 2 and the outer ring is tightly contacted and matched with the backflow connector body 311, so as to prevent bile from leaking from a contact gap in the process of being reinjected into the backflow cavity 22. Obviously, the backflow connector body 311 and the first sealing ring 313 are sterilized in advance to avoid contaminating the bile.

In the actual installation process of the backflow joint 31, the conduit 2 may first pass through the backflow joint main body 311, and then the two first sealing nuts 312 on the two sides of the backflow joint main body 311 are sequentially screwed, so that the backflow joint main body 311 is fixed on the predetermined position of the conduit 2, and the first sealing ring 313 is tightly contacted with the pipe wall of the conduit 2, thereby increasing the sealing performance of the backflow joint 31.

As shown in fig. 5 and 7, the return connector 31 further includes a return port 314 and a syringe 33. The return port 314 is connected to the inner cavity of the return connector body 311, and connected to the bile storage bag 1 via a return pipe and the injector 33 on the return pipe, so that the bile in the bile storage bag 1 can flow into the inner cavity of the return connector body 311 under the driving of the injector 33. In order to improve the overall sealing effect, the backflow port 314 may be integrated with the backflow connector body 311, that is, the backflow port 314 is a branch port in the three-way structure of the backflow connector body 311.

In this embodiment, bile in the bile storage bag 1 may be returned by the injector 33 capable of providing a liquid flow pressure, and the injector 33 may be a manual piston-type injector or an automatic micro-pump. In practical application, the bile storage bag 1 can be hung at a higher position, and the bile can flow back to the intestinal tract by the self-gravity of the bile. In this case, the injector 33 and the return port 314 may be configured similar to a conventional infusion device, and in this case, the injector 33 is a ventilation tube for keeping the air pressure in the bile storage bag 1 stable, so that the bile in the bile storage bag 1 is drawn into the inner cavity of the return connector body 311.

As shown in fig. 6, the drain connector 32 further includes a drain connector body 321, and a second sealing nut 322 screwed on one end of the drain connector body 321. Clinically, the catheter 2 penetrates the drainage connector body 321, i.e. penetrates the drainage connector body 321 and the whole drainage connector 32 can be fixed on the catheter 2 by tightening the second sealing nut 322.

To facilitate the installation of the bile storage bag 1, a second sealing nut 322 should be provided on the drainage connector body 321 at an end remote from the bile storage bag 1. Therefore, the drainage connector body 321 should be externally threaded at an end away from the bile storage bag 1 to mate with the second sealing nut 322. The drainage connector body 321 is connected with the bile storage bag 1 to realize that the bile storage bag 1 is communicated with the drainage cavity 21. The bile storage bag 1 may be directly fixed with the drainage connector body 321, or may be fixed with other detachable means, for example, a snap, a compression ring, a threaded connection, etc. Constitute detachable connected mode between bile storage bag 1 and the drainage joint main part 321, can be when containing impurity in the bile of drainage play, if just when beginning the drainage, dismantle bile storage bag 1, avoid the impurity in the alimentary canal to influence the bile quality of drainage play.

Also, in order to maintain the sealability between the drainage connector body 321 and the catheter 2, leakage of bile in the bile storage bag 1 out of the gap at the bag body junction is avoided in individual cases. A second sealing ring 323 close to the second sealing nut 322 is arranged in the drainage connector main body 321. The second sealing ring 323 is made of a soft material and is in close contact with the outer wall of the catheter 2 and the inner cavity of the drainage connector main body 321 respectively, so that a gap between the second sealing nut 322 and the drainage connector main body 321 is filled, and the sealing effect is improved.

In the above embodiment, the first gland nut 312 and the second gland nut 322 are used to screw together to fix the return connector body 311 and the drain connector body 321 to the catheter 2. Specific implementations may include the following two:

firstly, the outer surfaces of the two joint main bodies are provided with external threads, and the joint main bodies keep a certain wedge-shaped structure, that is, the diameters of the inner cavities of the backflow joint main body 311 and the drainage joint main body 321 are gradually reduced along with the screwing of the first sealing nut 312 and the second sealing nut 322 until the inner cavities are tightly coated on the pipe wall of the catheter 2. That is, the fixation is achieved by the contact friction between the lumens of the return fitting body 311 and the drainage fitting body 321 and the catheter 2.

Secondly, as shown in fig. 5, the interior of the main body 311 of the backflow connector has a tapered inner cavity structure, and a protrusion is provided on the side of the first sealing nut 312 contacting the first sealing ring 313. In the screwing process, the position of the first nut 312 is gradually close to the middle position of the backflow connector main body 311, so that the first sealing ring 313 is extruded by the protrusion on the first sealing nut 312, and further, the first sealing ring 313 generates an acting force towards the central position of the first sealing ring 313 under the compression of the protrusion and the tapered cavity structure, and then the first sealing ring 313 can tightly cover the conduit 2, so that the backflow connector 31 is fixed on the conduit 2. It can be seen that in this embodiment, the first sealing ring 313 not only serves to maintain the sealing effect, but also plays a role in fixing the backflow connector 31.

Likewise, the second sealing nut 322 also makes it possible to fasten the drainage nipple 32 to the catheter 2 in the manner described above. Further, the fixation of the drainage connector 32 to the catheter 2 can also be achieved by a structure as shown in fig. 6. That is, the second sealing nut 322 has a gradually narrowing tapered structure inside, and in the process of screwing the second sealing nut 322, the second sealing ring 323 is driven to gradually approach to one side end face of the drainage joint main body 321, so that the tapered inner cavity of the second sealing nut 322 and the end face of the drainage joint main body 321 press the second sealing ring 323 at two sides. And the tapered inner cavity structure can generate acting force towards the central position of the second sealing ring 323, so that the second sealing ring 323 can be tightly coated on the pipe wall of the catheter 2, and the position fixation of the drainage joint 32 is realized.

It can be seen that the solution provided by the present application can fix the backflow connector 31 and the drainage connector 32 to the catheter 2 by the compression connection of the first sealing ring 313 and the second sealing ring 323. The connecting method can adapt to the structure of the catheter 2, avoids processing an additional connecting structure on the catheter 2, and greatly improves the installation efficiency of the connector because the installation positions of the backflow connector 31 and the drainage connector 32 are not limited by precision. In addition, because the first sealing ring 313 and the second sealing ring 323 have soft characteristics, severe compression on the pipe wall of the conduit 2 can be avoided, and damage to the conduit 2 when the nut is screwed is avoided.

According to the technical scheme, the biliary tract drainage tube comprises a catheter 2, a bile storage bag 1 and a connector assembly 3. Wherein, the duct 2 is communicated with the bile storage bag 1 through the joint component 3, so that the bile in the biliary tract is discharged out of the body through the drainage cavity 21 in the duct 2 and is stored in the bile storage bag 1. When reinjection is required, bile is returned to the intestinal tract through the return lumen 22 in the catheter 2, and participates in digestion. The catheter 2 is arranged in the same pipeline by arranging the drainage cavity 21 and the return cavity 22 in the same pipeline, and the collection and the release of bile are independently carried out through the bile collecting hole 23 and the bile releasing hole 24 at different positions, so that the catheter 2 is conveniently arranged in the body of a patient.

In some embodiments of the present application, as shown in FIG. 3, the cross-sectional area of the drainage lumen 21 is less than or equal to the cross-sectional area of the return lumen 22. That is, in the present embodiment, the cavity space of the drainage cavity 21 is slightly smaller than that of the return cavity 22. Such structure can adapt to biliary tract pressure, makes the bile in drainage chamber 21 can be at drainage process stable flow direction, avoids appearing the uneven problem that causes the reverse flow of bile of pressure. In addition, the structure can also ensure that the backflow cavity 22 has a larger space, so that when bile needs to be reinjected, the bile can quickly enter the intestinal tract through the backflow cavity 22 to participate in the digestion process.

In the technical scheme that this application provided, pipe 2 need extend to patient's nasal cavity from the biliary tract all the time, therefore pipe 2's length is longer, and is difficult to carry out accurate control in many times. Moreover, the biliary tract is located near the duodenum of the patient, the opening of the biliary tract is thin, and the defect that precise control is difficult is further overcome, so that the catheter 2 is difficult to smoothly enter the biliary tract. Therefore, in order to facilitate the smooth entering of the catheter 2 into the predetermined position in the biliary tract, in some embodiments of the present application, the end of the backflow cavity 22 at the biliary tract end 202 of the catheter 2 is a closed structure, and on one hand, the closed structure at the end of the catheter 2 can prevent bile from entering the backflow cavity 22 through the end of the backflow cavity 22, so as to avoid bile loss; on the other hand, can further set up the enclosed construction of tip into arc to pipe 2 can be in patient's biliary tract and the smooth and easy operation in the alimentary canal, can also avoid causing the damage to the alimentary canal in addition.

Further, as shown in fig. 4, the portion of the catheter 2 near the biliary tract end 202 is shaped into a curved configuration to conform to the shape of the biliary tract. That is, in this embodiment, the catheter 2 is located at a section within the biliary tract, and has a curved arc-shaped configuration conforming to the natural shape of the biliary tract. At the end of the tube 2 in the region of the duodenum, the tube has a helical configuration and is in smooth communication with a section of the tube 2 in the biliary tract. It can be seen that, in the present embodiment, the portion of the catheter 2 near the biliary tract end 202 is shaped into a curved structure, which can adapt to the shape of the biliary tract, so as to avoid the catheter 2 from pressing the wall of the biliary tract of the patient, and alleviate the pain of the patient. And, the spiral structure of pipe 2 in duodenum department can avoid pipe 2 in the intestinal, appears buckling, avoids blockking up drainage chamber 21 in pipe 2.

In addition, when the biliary tract drainage tube provided by the application is actually used, the guide tube 2 is inserted into the duodenoscope along the guide wire and is placed at a preset position in the bile duct. And then, observing whether the placing position of the catheter 2 is correct or not through an X-ray machine. If the placement position meets the predetermined requirement, the endoscope and the guide wire are withdrawn from the human body, so that the catheter 2 is retained at the predetermined position. After the position of the biliary tract end 202 of the catheter 2 is determined, the nasal cavity end 201 of the catheter 2 can be pulled out of the nasal cavity of the patient, the connector component 3 is installed on the catheter 2, and finally the connector component 3 is connected with the bile storage bag 1 to complete the placement of the whole biliary tract drainage tube. When bile in the bile storage bag 1 needs to be reinjected into the intestinal tract of a patient, the liquid injector 33 can be installed on the backflow connector 21 of the catheter 2 and communicated with the liquid injection opening of the backflow cavity 22, namely, the liquid injector 33 can be used for extracting the bile from the bile storage bag 1 at any time and injecting the bile back into the body through the backflow cavity 22.

Known from above technical scheme, the biliary tract drainage tube that this application provided adopts two-chamber structure, and more one backward flow chamber 22 than conventional nose bile drainage tube. Therefore, can realize bile drainage, return bile to internal injection, and then solve ordinary nose courage drainage tube and abandon after bile drainage goes out external, can't participate in human digestion's problem. On the other hand, the biliary tract drainage tube that this application provided adopts the two-chamber pipe of integral type for operation process only need operate a pipe and can realize that nose courage drainage position places, and through pipe 2 and the dismantled connection of connector assembly 3, still make pipe 2 draw forth from the nasal cavity more easily. Meanwhile, the connection with the external bile storage bag 1 is also convenient.

The embodiments provided in the present application are only a few examples of the general concept of the present application, and do not limit the scope of the present application. Any other embodiments extended according to the scheme of the present application without inventive efforts will be within the scope of protection of the present application for a person skilled in the art.

Claims (10)

1. A biliary tract drainage tube, comprising:

a catheter (2) for draining and reinjecting bile;

a connector assembly (3) removably connectable to a nasal end (201) of the catheter (2);

wherein the catheter (2) is an integrated double-lumen tube;

a drainage cavity (21) and a reflux cavity (22) which are mutually isolated are arranged in the catheter (2); a bile collecting hole (23) communicated with the drainage cavity (21) is formed in the tube wall of the catheter (2) close to the biliary tract end (202); a bile release hole (24) communicated with the reflux cavity (22) is also formed in the tube wall of the catheter (2); the bile collecting hole (23) and the bile releasing hole (24) are arranged at intervals.

2. The biliary drainage tube according to claim 1, wherein an end of the reflux lumen (22) at the biliary end (202) of the catheter (2) is closed to prevent bile from entering the reflux lumen (22) through the end of the reflux lumen (22).

3. Biliary drainage tube according to claim 1, characterized in that the part of the catheter (2) near the biliary end (202) is shaped in a curved configuration to adapt to the biliary shape.

4. The biliary drainage tube according to claim 1, further comprising a bile storage bag (1) for storing bile drained from the biliary tract; the bile storage bag (1) is connected to the catheter (2) by means of the connector assembly (3).

5. Biliary drainage tube according to claim 4, characterized in that the joint assembly (3) comprises a return joint (31) and a drainage joint (32) in series on the catheter (2);

the backflow connector (31) is communicated with the backflow cavity (22), and the drainage connector (32) is communicated with the drainage cavity (21) so as to provide different bile flow directions when bile drainage and backflow are carried out.

6. The biliary tract drainage tube according to claim 5, wherein the backflow connector (31) comprises a backflow connector body (311) of a three-way structure, and two first sealing nuts (312) screwed at both ends of the backflow connector body (311);

the guide pipe (2) penetrates through the backflow connector main body (311), and the inner cavity of the backflow connector main body (311) is communicated with the backflow cavity (22); a first sealing ring (313) which is respectively contacted with two first sealing nuts (312) is arranged in the backflow joint main body (311).

7. The biliary tract drainage tube according to claim 6, wherein the backflow connector (31) further comprises a backflow port (314) and an injector (33), and the backflow port (314) and the backflow connector body (311) are of an integrated structure; the backflow port (314) is communicated with a bile storage bag (1) through an injector (33) so as to extract bile in the bile storage bag (1) to the inner cavity of the backflow connector body (311).

8. The biliary drainage tube according to claim 5, wherein the drainage connector (32) includes a drainage connector body (321), and a second sealing nut (322) threaded at one end of the drainage connector body (321);

the drainage joint main body (321) is connected with a bile storage bag (1); the catheter (2) penetrates through the drainage joint main body (321), and a second sealing ring (323) close to the second sealing nut (322) is arranged in the drainage joint main body (321).

9. Biliary tract drainage tube according to claim 1, characterized in that inside the catheter (2) a barrier plate (25) is provided; the partition plate (25) partitions the inner cavity of the catheter (2) into the drainage cavity (21) and the backflow cavity (22), so that the cross-sectional area of the drainage cavity (21) is smaller than or equal to that of the backflow cavity (22).

10. The biliary drainage tube according to claim 1, wherein the wall of the catheter (2) near the biliary end (202) is provided with a plurality of bile collecting holes (23) to accelerate the collection of bile in the biliary tract and relieve biliary pressure.

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