Biliary tract drainage catheter and biliary tract drainage device
By setting adjustment holes and grooves on the biliary drainage catheter and adjusting the size of the pig tail coil using the traction line, the problem that traditional biliary drainage catheter cannot be adjusted individually is solved, achieving more efficient bile drainage and reducing complications.
Patent Information
- Application Number
- CN202422024351.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-20
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-08-20
AI Technical Summary
Traditional biliary drainage catheters cannot adjust the drainage hole position according to the individualized biliary length, resulting in bile extravasation or accumulation, increasing the risk of complications and affecting the drainage effect.
A biliary drainage catheter was designed. By setting adjustment holes in the grooves on the tube body, the size of the pig tail is adjusted using the traction wire to adapt to different biliary lengths, and ensuring the accurate position of the drainage holes.
It improves the accuracy and safety of bile drainage, reduces the risk of bile extravasation and infection, and improves the drainage effect.
Smart Images
Figure CN223126963U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of medical devices, and particularly relates to a biliary drainage catheter and a biliary drainage device. Background Art
[0002] Bile is secreted by liver cells and flows into the duodenum through the hepatic duct and the common bile duct; or it flows into the gallbladder through the hepatic duct and the cystic duct for storage, and then is discharged from the gallbladder into the duodenum when digestion is needed. An adult secretes 800-1000 ml of bile per day. The main function of bile is to emulsify fat into droplets for easy digestion, and it can also promote the absorption of fatty acids and fat-soluble vitamins. It is an important part of the digestive system. When bile is stagnated due to extrahepatic tumors, stones, inflammation, etc., it will cause an increase in the pressure in the biliary tract. Bile flows back from hepatocytes and bile canaliculi into the blood sinus and perisinusoidal space, causing the level of conjugated bilirubin in the blood to rise and resulting in jaundice. In severe cases, it will cause liver cirrhosis, liver failure and even death. Clinically, placing a drainage tube is usually selected as a means to drain bile and relieve symptoms.
[0003] When the traditional biliary drainage catheter is in use, it is usually fixed to the duodenum by forming a pigtail at the end part. The drainage catheter is fixed by the pigtail part, and the position of its drainage side holes is fixed and not designed according to individual conditions. However, the length of the patient's bile duct is not fixed, and the position of puncturing the intrahepatic bile duct is not fixed. A biliary drainage catheter that cannot adjust the distance between the drainage side holes on the tube body and the pigtail often has the drainage hole section of the tube body longer than the bile duct length, resulting in the drainage holes leaking outside the bile duct, causing bile leakage, and even causing biliary tract infection or bile peritonitis; or because the length of the external drainage side hole section is too short compared with the bile duct length, the external drainage side holes accumulate at one end of the bile duct, seriously affecting the drainage effect. Therefore, the traditional biliary drainage catheter has problems of many complications and poor drainage effect. Summary of the Utility Model
[0004] In order to solve the above problems, the utility model provides a biliary drainage catheter and a biliary drainage device, which can adjust the length of the drainage hole section on the tube body by adjusting the size of the pigtail loop to meet the needs of patients with different biliary lengths, thereby reducing complications and improving the drainage effect.
[0005] In a first aspect, the utility model provides a biliary drainage catheter, which includes a tube body. The tube body includes a tube body section and a pigtail section. The tube body has a traction wire cavity and a drainage cavity extending along the length direction. A plurality of first drainage holes and second drainage holes communicating with the drainage cavity are respectively arranged on the tube body section and the pigtail section; a threading hole communicating with the traction wire cavity is arranged at the distal end of the pigtail section. A groove is provided on the tube body between the first drainage holes and the second drainage holes, and a plurality of adjustment holes communicating with the traction wire cavity are arranged along the length direction in the groove. In some embodiments, the number of adjustment holes is 2-6; the distance between the adjustment holes is 1-3 mm.
[0006] Further, the first drainage holes are uniformly arranged at intervals in the circumferential and longitudinal directions on the tube wall of the drainage channel. Preferably, some of the first drainage holes communicate the traction wire channel with the drainage channel.
[0007] Further, the second drainage holes are uniformly arranged in the longitudinal direction on one side wall of the drainage channel.
[0008] In a second aspect, the present utility model provides a biliary drainage device, including a traction wire, a traction wire fixing member, and the biliary drainage catheter of the first aspect; one end of the traction wire is fixed to the traction wire fixing member, and the other end sequentially extends along the traction wire channel and passes out through the threading hole, extends along the outer surface of the tube body and passes back into the traction wire channel through one of the adjustment holes, and extends along the traction wire channel and is fixed to the traction wire fixing member.
[0009] Further, the biliary drainage device further includes a sealing assembly, and the sealing assembly is connected to the proximal end of the tube body.
[0010] Further, the traction wire enters the traction wire channel from the sealing assembly.
[0011] The features and advantages of the present disclosure include: when a doctor uses the biliary drainage device of the present utility model, the size of the pigtail loop can be changed by selecting a suitable adjustment hole to meet the biliary lengths of different patients. When it is necessary to change the adjustment hole of the traction wire, after cutting the tube wall between the adjustment holes with scissors, pulling the traction wire, the traction wire will automatically lock to the adjustment hole selected by the doctor. Since the adjustment holes are arranged in the groove, when the doctor needs to adjust the adjustment hole of the traction wire and cuts the tube wall between the adjustment holes with scissors, it can be ensured that the scissors move along the length direction of the groove in the groove, and the scissors will not cut to other positions, so it is ensured that the drainage catheter will not be damaged. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0013] Figure 1 is a schematic structural diagram of the biliary drainage device of the present utility model;
[0014] Figure 2A is a schematic structural diagram of the biliary drainage catheter of the present utility model in one direction;
[0015] Figure 2B is a schematic structural diagram of the biliary drainage catheter of the present utility model in another direction;
[0016] Figure 3A A cross-sectional enlarged schematic view of the proximal side of the biliary drainage catheter;
[0017] Figure 3B A cross-sectional enlarged schematic view at one of the adjustment holes of the biliary drainage catheter;
[0018] Figure 3C A longitudinal sectional view of the biliary drainage catheter;
[0019] Figure 4A A schematic view of the traction wire passing through the adjustment hole at the distalmost end of the biliary drainage catheter;
[0020] Figure 4B A schematic view of the traction wire passing through the adjustment hole at the proximalmost end of the biliary drainage catheter;
[0021] Figure 5 A schematic view of the structure of the biliary drainage catheter after forming a pigtail loop.
[0022] Explanation of reference numerals:
[0023] 100 - Biliary drainage device, 200 - Biliary drainage catheter;
[0024] 1 - Tube body, 101 - Tube body section, 102 - Pigtail section, 103 - Groove, 11 - Traction wire lumen, 12 - Drainage lumen, 13 - First drainage hole, 14 - Adjustment hole, 15 - Second drainage hole, 16 - Threading hole;
[0025] 2 - Sealing assembly;
[0026] 3 - Traction wire;
[0027] 4 - Traction wire fixing piece. Detailed implementation manners
[0028] Next, the technical solutions in the embodiments of the present disclosure will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present disclosure.
[0029] For the purpose of this patent application, the term "distal end" refers to the end of the device farthest from the operator. The term "proximal end" refers to the end of the device close to the operator, in the direction towards the access site where the device is introduced into the body. The term "cross-section" refers to cutting along the width direction or radial direction of the device, and the term "longitudinal section" refers to cutting along the length direction or axial direction of the device.
[0030] The present utility model provides a biliary drainage catheter 100 and a biliary drainage device 200. Refer to Figure 1 , the biliary drainage device 200 includes a biliary drainage catheter 100, a sealing assembly 2, a traction wire 3, and a traction wire fixing member 4. Refer to Figure 2A and Figure 2B , a plurality of first drainage holes 13, a plurality of second drainage holes 15, a plurality of adjustment holes 14, and a threading hole 16 are provided on the biliary drainage catheter 100. The proximal end of the biliary drainage catheter 100 is fixed to the sealing assembly 2. One end of the traction wire 3 is fixed to the traction wire fixing member 4, and the other end passes through the sealing assembly 2 and then enters the tube body 1, passes out of the tube body 1 through the threading hole 16, and then passes into the tube body 1 through one of the adjustment holes 14, and finally folds back and is fixed to the traction wire fixing member 4.
[0031] Since the distance between the most distal first drainage hole 13 and the nearest second drainage hole 15 is fixed and unchanged, after the distal end of the biliary drainage catheter 100 forms a pigtail loop, all the second drainage holes 15 are within the pigtail loop. By changing the size of the pigtail loop, the distance between the first drainage hole 13 and the pigtail loop can be changed, and the relative position of the pigtail loop fixed in the duodenum will not change. Therefore, by changing the size of the pigtail loop, the position of the first drainage hole 13 in the bile duct can be changed to adapt to patients with different biliary lengths. When a doctor uses the biliary drainage catheter 100 of the present utility model, the size of the pigtail loop can be changed by selecting a suitable adjustment hole 14 to meet the biliary lengths of different patients. Selecting the most distal adjustment hole 14 can form the smallest pigtail loop, and selecting the nearest adjustment hole can form the largest pigtail loop; a smaller pigtail loop is suitable for patients with a longer biliary length, and a larger pigtail loop is suitable for patients with a shorter biliary length.
[0032] Refer to Figure 2A and Figure 2B , the biliary drainage catheter 100 includes a tube body 1 and a nose cone connected to the distal end of the tube body 1. The tube body 1 includes a tube body section 101 and a pigtail section 102. A plurality of first drainage holes 13 are provided on the tube body section 101, a plurality of second drainage holes 15 are provided on the pigtail section 102, a threading hole 16 is provided at the distal end of the pigtail section 102, and a groove 103 is provided on the tube body 1 between the first drainage hole 13 and the second drainage hole 15. A plurality of adjustment holes 14 are provided along the length direction in the groove 103. The number of adjustment holes 14 can be any number more than 2, and generally 2 to 6 adjustment holes 14 are preferably provided. In Figure 2AIn the illustrated embodiment, the number of adjustment holes 14 is four. The diameter of the adjustment holes 14 only needs to be such that it is convenient to thread the traction wire 3. For example, when the outer diameter of the traction wire 3 is 0.25 mm, the diameter of the adjustment holes 14 is preferably 0.8 mm; the distance between the adjustment holes 14 can be set according to the adjustment accuracy. In a preferred embodiment, the distance between the adjustment holes 14 is set to 1 - 3 mm. For example, the distance between the adjustment holes 14 is 2 mm.
[0033] See Figure 3A , Figure 3B and Figure 3C , the tube body 1 has a traction wire channel 11 and a drainage channel 12 extending along the length direction. The first drainage holes 13 and the second drainage holes 15 communicate with the drainage channel 12, and the wire threading holes 16 and the adjustment holes 14 communicate with the traction wire channel 11. The first drainage holes 13 are uniformly arranged at intervals along the circumferential and length directions on the tube wall of the drainage channel 12. In a preferred embodiment, see Figure 3C , some of the first drainage holes 13 also connect the drainage channel 12 with the traction wire channel 11 so as to introduce the bile flowing into the traction wire channel 11 from the wire threading holes 16 and the adjustment holes 14 into the drainage channel 12. In a preferred embodiment, the second drainage holes 15 are uniformly arranged along the length direction on one side wall of the drainage channel 12. See Figure 5 , after forming the pigtail loop, the second drainage holes 15 are located inside the pigtail loop, which can prevent the outer wall of the pigtail loop from fitting against the human body and blocking the second drainage holes 15.
[0034] See Figure 1 , the sealing assembly 2 of the biliary drainage device 200 is connected to the proximal end of the tube body 1. The sealing assembly 2 can be any sealing assembly as long as it can facilitate the installation of the traction wire 3 and seal the tube body 1. See Figure 1 , the proximal end of the tube body 1 is connected to the sealing assembly 2.
[0035] Continuing to see Figure 1 , one end of the traction wire 3 is fixed to the traction wire fixing member 4, and the other end of the traction wire 3 enters the traction wire channel 11 of the tube body 1 from the sealing assembly 2. See Figure 4A Or Figure 4B , the other end of the traction wire 3 first extends along the traction wire channel 11 to the distal end of the tube body 1, passes through the tube body 1 from the wire threading hole 16, then extends along the outer surface of the tube body 1, passes back into the traction wire channel 11 from one of the adjustment holes 14, and then extends along the traction wire channel 11 towards the proximal end of the tube body 1 and passes out from the sealing assembly 2, and finally is fixed to the traction wire fixing member 4. Among them, the traction wire fixing member 4 can be any structure as long as it can facilitate the pulling and fixing of the traction wire. See Figure 1 , the traction wire fixing member 4 is configured as a buckle, and a snap ring and a handle are provided on the buckle, and a plurality of card slots are provided on the inner circumference of the snap ring.
[0036] See Figure 4A , for the biliary drainage device provided by the present utility model, when leaving the factory, the traction wire 3 passes back through the adjustment hole 14 at the most distal end into the traction wire cavity 11, and the smallest-sized pigtail loop can be formed. The first drainage hole 13 is the farthest from the pigtail loop, which is suitable for patients with a long biliary tract; when it is necessary to use it for patients with a shorter biliary tract, the doctor can use scissors to cut through the pipe wall between the adjustment holes 14 along the connection line of the centers of each adjustment hole 14 until the required adjustment hole 14 is reached. See Figure 4B , when cutting to the adjustment hole 14 at the nearest end, the largest-sized pigtail loop can be formed. After the doctor determines the adjustment hole 14 of the traction wire 3, by pulling the traction wire 3, the threading hole 16 can be made to coincide with the adjustment hole 14 through which the traction wire 3 passes to form a pigtail loop, as shown in Figure 5 . When it is necessary to change the adjustment hole 14 of the traction wire 3, after using scissors to cut through the pipe wall between the adjustment holes 14, pull the traction wire 3, and the traction wire 3 will automatically lock to the adjustment hole 14 selected by the doctor. Since the adjustment hole 14 is provided in the groove 103, when the doctor needs to adjust the adjustment hole 14 of the traction wire 3 and uses scissors to cut the pipe wall between the adjustment holes 14, it can be ensured that the scissors move along the length direction of the groove within the groove, and the scissors will not cut to other positions to ensure that the drainage catheter will not be damaged.
[0037] The above are only several embodiments of the present disclosure. Those skilled in the art can make various changes or modifications to the embodiments of the present disclosure without departing from the spirit and scope of the present disclosure based on the content disclosed in the application documents.
Claims
1. A biliary drainage catheter, comprising a tube body (1), the tube body (1) including a tube body section (101) and a pigtail section (102), characterized in that: The tube body (1) has a traction wire channel (11) and a drainage channel (12) extending along the length direction; A plurality of first drainage holes (13) and second drainage holes (15) communicating with the drainage channel (12) are respectively arranged on the tube body section (101) and the pigtail section (102); A threading hole (16) communicating with the traction wire channel (11) is arranged at the distal end of the pigtail section (102); A groove (103) is provided on the tube body (1) between the first drainage hole (13) and the second drainage hole (15), and a plurality of adjustment holes (14) communicating with the traction wire channel (11) are arranged along the length direction in the groove (103).
2. The biliary drainage catheter according to claim 1, characterized in that The number of the adjustment holes (14) is 2 to 6.
3. The biliary drainage catheter according to claim 2, wherein The distance between the adjustment holes (14) is 1 to 3 mm.
4. The biliary drainage catheter according to any one of claims 1 to 3, characterized in that, The first drainage holes (13) are uniformly arranged at intervals along the circumferential and length directions on the tube wall of the drainage channel (12).
5. The biliary drainage catheter according to claim 4, wherein, Some of the first drainage holes (13) communicate the traction wire channel (11) with the drainage channel (12).
6. The biliary drainage catheter according to claim 5, characterized in that, The second drainage holes (15) are uniformly arranged along the length direction on one side tube wall of the drainage channel (12).
7. A biliary drainage device, characterized in that, Comprising a traction wire (3), a traction wire fixing member (4) and the biliary drainage catheter according to any one of claims 1 to 6; One end of the traction wire (3) is fixed on the traction wire fixing member (4), and the other end sequentially extends along the traction wire channel (11), passes out from the threading hole (16), extends along the outer surface of the tube body (1), passes back into the traction wire channel (11) from one of the adjustment holes (14), and extends along the traction wire channel (11) and is fixed to the traction wire fixing member (4).
8. The biliary drainage device according to claim 7, wherein It further includes a sealing assembly (2), and the sealing assembly (2) is connected to the proximal end of the tube body (1).
9. The biliary drainage device according to claim 8, wherein, The traction wire (3) enters the traction wire channel (11) from the sealing assembly (2).