CN111588965A

CN111588965A - Drainage tube with good drainage effect for ERCP (percutaneous transluminal coronary angioplasty) operation

Info

Publication number: CN111588965A
Application number: CN202010432372.7A
Authority: CN
Inventors: 张�诚
Original assignee: Shanghai East Hospital Tongji University Affiliated East Hospital
Current assignee: Shanghai East Hospital Tongji University Affiliated East Hospital
Priority date: 2020-05-20
Filing date: 2020-05-20
Publication date: 2020-08-28

Abstract

The invention provides a drainage tube for ERCP operation with good drainage effect. The drainage device comprises a head part, a drainage part and a tail part which are sequentially connected, wherein the drainage part comprises a slit pipe section, and the head part extends into a pipeline to be drained in a working state. The slit pipe section comprises at least 3 arc pipe walls with the same specification, the distance between every two adjacent arc pipe walls is the same, so that the sectional areas of a plurality of drainage slits formed between every two adjacent strip pipe walls are the same, grooves are formed in two sides of each arc pipe wall, and oval side holes are formed in the grooves of the adjacent pipe walls. The slit pipe section of the second scheme comprises an arc pipe wall, the arc of the arc pipe wall is an upper arc, the inferior arc side matched with the upper arc is a longitudinal split, and a plurality of spiral-shaped elliptic side holes from top to bottom are formed in the arc pipe wall. The slit pipe section of the drainage part can be used for fully draining, so that the drainage effect is kept, and the supporting force and the tension of the drainage part can be kept.

Description

Drainage tube with good drainage effect for ERCP (percutaneous transluminal coronary angioplasty) operation

Technical Field

The invention relates to a minimally invasive medical technology and surgical instruments, in particular to a drainage tube with good drainage effect for ERCP (percutaneous transluminal coronary angioplasty) operation.

Background

Common bile duct stones are common diseases and frequently encountered diseases in China, bile excretion can be unsmooth due to blockage of the common bile duct stones, complications such as acute cholangitis, obstructive jaundice and liver damage can be induced, manifestations such as shivering, fever, abdominal pain and jaundice appear, serious patients even cause shock, and long-term stone stimulation has the risk of bile duct cancer, so that the common bile duct stones are important diseases harmful to human health. The existing treatment scheme of the common bile duct calculus comprises the steps of laparotomy biliary tract exploration calculus removal, laparoscopic biliary tract exploration calculus removal, Endoscopic Retrograde Cholangiopancreatography (ERCP) calculus removal, Percutaneous Transhepatic Cholangiopuncture (PTCD), fistula expansion and Percutaneous Transcholangioscopy (PTCS) calculus removal, PTCD-approach duodenal papillary balloon dilatation balloon calculus removal and the like. For high-risk patients with advanced age, more basic diseases, cardiopulmonary dysfunction and the like, the risk of radical surgery is high, the bile loss caused by PTCD is not easy to recover the organism, the biliary tract drainage in the conventional much-adopted-scope ERCP way is subjected to radical surgery after the disease condition is stable.

Endoscopic Retrograde Cholangiopancreatography (ERCP) is a minimally invasive surgical scheme for treating diseases of liver, gallbladder and pancreas at present, and has the advantages of small wound, quick recovery, few complications and the like. Complications such as hemorrhage, acute pancreatitis and acute cholangitis also exist in the ERCP operation, wherein the pathogenesis of the acute cholangitis is that edema of duodenal papillary sphincter is caused after repeated intubation, incision and expansion of the bile duct, so that inflammatory stenosis of the opening of the bile duct is caused, and bile excretion is not smooth, so that bile duct hypertension is caused. The existing prevention scheme of acute cholangitis after ERCP (acute cholangitis) comprises drug conservation treatment, endoscopic cholangiostent implantation (ERPD), endoscopic nasobiliary drainage and the like.

In order to prevent acute cholangitis in ERCP complications, postoperation indwelling of the nasal bile duct is an important method at present, bile is fully drained, the pressure of the bile duct is reduced, and meanwhile, the nasal bile duct can be flushed by using an antibiotic solution, so that the discharge of infectious bile, pus, bile mud and broken stones is promoted. The currently used nasal bile ducts comprise a loop type nasal bile duct and a single pig caudal nasal bile duct, wherein circular side holes on the tube walls of the two nasal bile ducts are both positioned at the head ends, and if the nasal bile duct is placed in a deep intrahepatic bile duct, the nasal bile duct has no drainage effect on other intrahepatic bile ducts and extrahepatic bile ducts; the side holes of the drainage tube are small, the number of the side holes is limited, bile drainage is limited, and blockage is easy to occur. Therefore, the nasal bile duct of some patients after operation has no bile drainage or the drainage quantity of bile is less, and the purpose of effective drainage can not be achieved.

In addition to the external drainage tube, another important method is to provide a biliary tract internal drainage tube such as a biliary duct stent, the biliary tract internal drainage tubes currently used are mostly biliary duct stents with anti-skid side wings at two ends or single pigtail biliary duct stents, and the tube walls at two ends of the drainage tube are provided with circular side holes so as to fully drain bile, bile mud and silt-like stones in the extrahepatic biliary duct. Because the side hole is less, and the quantity is less, take place the drainage tube side hole easily and block up, lead to the bile drainage not smooth, lost the effect of abundant drainage bile.

Similarly, the main causes of acute pancreatitis are duodenal papillary sphincter edema after repeated intubation of bile duct, incision and dilation of papillary sphincter, resulting in inflammatory stenosis of pancreatic duct opening and pancreatic duct hypertension caused by poor pancreatic juice excretion. The current prevention scheme for post-ERCP pancreatitis comprises two types, namely drug conservation treatment and endoscopic pancreatic duct stent implantation (ERPD).

The drug therapy is mainly used for reducing pancreatic duct pressure by inhibiting pancreatic juice secretion or preventing pancreatitis by inhibiting pancreatic enzyme activity; ERPD is to place a pancreatic duct stent through the duodenal papilla, and reduce pancreatic duct pressure by draining pancreatic juice in a pancreatic duct to the duodenum through the stent. Wherein, ERPD curative effect is definite, which is the main operation scheme for preventing acute pancreatitis after ERCP operation. The pancreatic duct stent used at present comprises three types, namely a straight pancreatic duct stent with barbs, a single pigtail pancreatic duct stent and a double pigtail pancreatic duct stent. Although placing the pancreatic duct stent can obviously reduce the incidence rate of acute pancreatitis after ERCP operation, the incidence rate of the hyperpylaemia is increased at the same time. Compared with acute pancreatitis, hyperamylase does not cause pancreatitis and edema, and patients do not have abdominal pain symptoms, but too high amylase in blood has damage to various organs of the whole body, and the postoperative treatment needs to be carried out by medicines.

The pancreatic duct stent can drain pancreatic juice in the main pancreatic duct, so that the pressure of the main pancreatic duct is reduced. However, the side holes on the wall of the currently used pancreatic duct stent are limited, but the pancreatic duct has more branches, and the side holes on the wall of the pancreatic duct are not enough to drain pancreatic juice in the branched pancreatic duct. For the patients without partial pancreatic duct expansion, after the pancreatic duct stent is placed, the pancreatic duct wall can even block the openings of branch pancreatic ducts, so that pancreatic juice in the branch pancreatic ducts is not smoothly discharged, and the occurrence of hyperpylaemia and acute pancreatitis is induced.

Disclosure of Invention

According to the technical problems provided by the above, the drainage tube for the ERCP operation with good drainage effect is provided. The technical means adopted by the invention are as follows:

the drainage tube for the ERCP operation, which is good in drainage effect, comprises a head part, a drainage part and a tail part which are sequentially connected, wherein the drainage part comprises a slit tube section, the slit tube section comprises at least 3 arc-shaped tube walls with the same specification, the distance between every two adjacent arc-shaped tube walls is the same, so that the sectional areas of a plurality of drainage slits formed between every two adjacent strip-shaped tube walls are the same, grooves are formed in two sides of each arc-shaped tube wall, the grooves of the adjacent tube walls form oval side holes, and the head part extends into a pipeline to be drained in a working state.

Furthermore, the drainage part comprises slit pipe sections and complete pipe sections which are arranged at intervals, and the longitudinal positions of the crack of one slit pipe section and the crack of the slit pipe section adjacent to the spaced complete pipe section are in the same straight line or not.

The other drainage tube for the ERCP operation, which has a good drainage effect, comprises a head part, a drainage part and a tail part which are sequentially connected, wherein the drainage part comprises a slit tube section, the slit tube section comprises an arc-shaped tube wall, the arc shape of the arc-shaped tube wall is a major arc, the minor arc side matched with the major arc is a longitudinal split, a plurality of elliptical side holes which are spirally shaped from top to bottom are arranged on the arc-shaped tube wall, and the head part extends into a pipeline to be drained in a working state.

Furthermore, the drainage part comprises a slit pipe section and a complete pipe section which are arranged at intervals, and the slit pipe section and the next slit pipe section adjacent to the interval complete pipe section are in a spiral walking shape, so that the adjacent splits are arranged in a spiral shape.

Furthermore, a first metal ring is arranged between the slit pipe section and the head part and/or a second metal ring is arranged between the slit pipe section and the tail part.

Furthermore, the drainage tube is an external drainage tube, in particular to a nasobiliary drainage tube, and in a working state, the head part and the drainage part are arranged in the intrahepatic bile duct, and the tail part extends out of the body.

Further, the head and/or the tail comprise/comprises a displacement prevention structure, the displacement prevention structure of the head comprises a spherical shape and a pigtail shape, the displacement prevention structure of the tail comprises a duodenal loop and a pyloric loop which are arranged on the drainage part side and matched with the duodenal shape and the pyloric shape, and the tail end of the tail is a linear tube.

Further, the drainage tube is an internal drainage tube, particularly a bile duct support, in a working state, the head part and the drainage part are placed in an intrahepatic bile duct, the tail part is close to duodenal papilla, the outer diameter of the bile duct support comprises 7-10Fr, and correspondingly, the inner diameter of the bile duct support is 5-8 Fr.

Further, the head and/or the tail comprise anti-displacement structures, the anti-displacement structures of the head comprise a sphere, a flank and a pigtail, and the anti-displacement structures of the tail comprise a sphere, a flank and a pigtail.

Further, the drainage tube is internal drainage tube, specifically is pancreatic duct support, and under operating condition, head and drainage portion put into the pancreatic duct, the afterbody is pressed close to the duodenum nipple, pancreatic duct support external diameter includes 5, 7Fr, correspondingly, and its internal diameter is 4, 6Fr, the afterbody is including preventing the displacement structure, prevent the displacement structure including flank, flank and sphere, flank and pigtail shape.

The invention provides two drainage tubes which are used for a nasobiliary duct, a bile duct stent and a pancreatic duct stent in an ERCP operation, and the drainage tube has the following advantages:

1. the tube wall of the invention is provided with the longitudinal crack and the elliptical side hole, bile or pancreatic juice can be fully drained, and the drainage effect and the unobstructed rate are superior to those of the existing nasobiliary tube, biliary tube stent and pancreatic tube stent which only have the side hole;

2. the wall of the pipe is discontinuously provided with longitudinal cracks, the cracks and the side holes are spirally arranged, the drainage effect is kept, and the supporting force and the tension of the drainage part can be kept;

3. the head or body part of the invention is provided with a displacement prevention structure, which has the function of preventing the nasal bile duct from displacing;

4. the invention is provided with the metal ring, and can position the position of the drainage part of the nasobiliary duct.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram (plan-bile duct stent) of embodiment 1 of the present invention.

FIG. 2 is a schematic cross-sectional view of a crack in an embodiment of the present invention.

FIG. 3 is a schematic view of an arcuate tube wall according to the present invention.

Fig. 4(a) - (h) are specific structural diagrams of a bile duct stent according to embodiments 2-9 of the present invention.

Fig. 5(a) - (i) are specific structural schematic diagrams of bile duct stent according to embodiments 10-18 of the present invention.

FIGS. 6(a) - (c) are schematic structural diagrams of a pancreatic duct stent according to embodiments 19-21 of the present invention.

FIGS. 7(a) - (c) are schematic structural diagrams of two pancreatic duct scaffolds according to embodiments 22-24 of the present invention.

Fig. 8(a) - (e) are specific structural diagrams of a nasobiliary tube according to embodiments 24-29 of the present invention.

Fig. 9(a) - (e) are specific structural schematic diagrams of two nasobiliary ducts in embodiments 29-34 of the present invention.

In the figure: 1. a head portion; 2. an arc-shaped pipe wall; 3. a tail portion; 4. a tail barb; 5. a tail barb hole; 6. a first metal ring; 7. a second metal ring; 8. draining the gap; 9. an elliptical side hole; 10. a complete pipe section; 11. a head barb; 12. a head barb hole; 13. and a longitudinal split.

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. 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.

The embodiment of the invention provides a drainage tube for an ERCP operation, which has a good drainage effect, is a single-channel tube and comprises a scheme I and a scheme II, wherein the scheme I comprises a head part, a drainage part and a tail part which are sequentially connected, the drainage part comprises a slit tube section, the slit tube section comprises at least 3 arc-shaped tube walls with the same specification, as shown in figure 2, in the embodiment, 4 arc-shaped tube walls are selected, the distance between every two adjacent arc-shaped tube walls is the same, so that the sectional areas of a plurality of drainage slits formed between every two adjacent strip-shaped tube walls are the same, grooves are arranged on two sides of each arc-shaped tube wall, the grooves of the adjacent tube walls form oval side holes, and in a working state, the head. As an alternative embodiment, the drainage part comprises slit pipe sections and complete pipe sections which are arranged at intervals, and the longitudinal positions of the cracks of one slit pipe section and the cracks of the slit pipe section adjacent to the interval complete pipe section are in the same straight line or not in the same straight line. The arc-shaped pipe wall is a minor arc, and the plurality of arc-shaped pipe walls and the drainage gaps form a complete circle.

Scheme two is including consecutive head, drainage portion and afterbody, drainage portion includes the gap pipeline section, the gap pipeline section includes the arc pipe wall, the arc of arc pipe wall is the major arc, and the minor arc side rather than matching is the rip row, is equipped with a plurality of oval side openings of going from last to spiral down to the shape on the arc pipe wall, under the operating condition, the head stretches into in treating the pipeline of drainage. In a preferred embodiment, the drainage portion comprises a slit pipe section and a complete pipe section which are arranged at intervals, and the slit pipe section and a next slit pipe section adjacent to the interval complete pipe section are in a spiral shape, so that adjacent slits are arranged in a spiral shape.

In order to position the drainage point, it is preferred if the slit pipe section is provided with a first metal ring on the head and/or a second metal ring is provided between the slit pipe section and the tail.

According to different complications, the drainage tube for ERCP operation comprises a nasobiliary drainage tube as an external drainage tube, a bile duct bracket and a pancreatic duct bracket as an internal drainage tube, the head part and the drainage part of the nasobiliary drainage tube are arranged in an intrahepatic bile duct in a working state, and the tail part extends out of the body and is connected with an external drainage bag; the bile duct stent is placed in an intrahepatic bile duct, the pancreatic duct stent is placed in a pancreatic duct, the tails of the bile duct stent and the pancreatic duct stent are positioned near the duodenal papilla, and bile or pancreatic juice is introduced into a digestive system.

Prevent displacement structure includes flank, spherical and pigtail shape, the flank is the barb, barb department still is equipped with the barb hole rather than corresponding, barb hole and lumen intercommunication. The spherical shape can prevent the displacement of the bile duct stent; the single pigtail shape can prevent the biliary tract stent from moving in the biliary tract, and is beneficial to the late-stage prolapse of the stent under the action of intestinal peristalsis. The corresponding stent is selected according to the actual clinical situation, which is detailed in the following embodiments.

Example 1

In the first embodiment, as shown in fig. 1, the biliary stent has a first option, wherein the biliary stent has a total length of 5-12 cm, an outer diameter of 7-10Fr, and an inner diameter of 5-8 Fr. The displacement structure of preventing of this embodiment bile duct support head and the displacement structure of preventing of afterbody are the flank, and head barb hole and head barb are located the same direction, and afterbody barb hole and afterbody barb are located the same direction, and the direction of head barb is opposite with the direction of afterbody barb. The specific using method comprises the following steps: the duodenoscope is placed through the mouth, and the zebra guide wire is placed into the intrahepatic bile duct after the bile duct is successfully cannulated. The device is firstly placed in a guide wire, then a propeller or other instruments with the propelling function, such as a cutting knife, an expansion bougie, a stone removal sacculus and the like, are placed in the intrahepatic bile duct by using the propeller under the guide of the guide wire. When the lateral wing of the tail part of the device is close to the duodenal papilla, the guide wire is withdrawn, the device is separated from the propeller, and the process of placing the bile duct support is completed.

Example 2

As shown in fig. 4(a), in the first embodiment, the bile duct stent is selected, the displacement prevention structure at the head is in a single pigtail shape, drainage micropores are formed in the pigtail, and the displacement prevention structure at the tail is in a spherical shape. The specific using method comprises the following steps: the duodenoscope is placed through the mouth, and the zebra guide wire is placed into the intrahepatic bile duct after the bile duct is successfully cannulated. The bile duct support and the propeller are placed in sequence under the guide of the guide wire, then the bile duct support and the propeller are placed in the outer sleeve, the assembled device is placed in the intrahepatic bile duct under the guide of the guide wire, when the head end of the outer sleeve is exposed, the outer sleeve is pulled back, and the tail of the bile duct support naturally forms a sphere. Under the guidance of the guide wire, the biliary duct stent is continuously pushed in by using the propeller, so that the spherical tail part of the biliary duct stent is close to the duodenal papilla, the propeller is fixed and the guide wire is withdrawn, the biliary duct stent is separated from the propeller, and the head end of the biliary duct stent is a loop, thereby completing the release of the biliary duct stent.

Example 3

As shown in fig. 4(b), in the present embodiment, a first bile duct support is selected, the present embodiment is similar to embodiment 1, and the difference is that the head displacement prevention structure is a single pigtail shape, in the present embodiment, the pigtail is disposed at the same side as the tail barb hole, and the specific use method is the same as embodiment 1.

Example 4

As shown in fig. 4(c), in the present embodiment, a first bile duct stent is selected, and the present embodiment is similar to embodiment 2, except that the head portion displacement prevention structure is spherical, the tail portion displacement prevention structure is a side wing, and the specific use method is the same as that of embodiment 2.

Example 5

As shown in fig. 4(d), in the present embodiment, a first bile duct stent is selected, and the present embodiment is similar to embodiment 4, except that the displacement preventing structure of the tail portion includes a single pigtail shape except for the side wings, and the pigtail is disposed at a position opposite to the barb of the tail portion, and the specific use method is the same as that of embodiment 2.

Example 6

As shown in fig. 4(e), in the present embodiment, a first bile duct stent is selected, which is similar to embodiment 4, but the difference is that the anti-displacement structure of the tail part is spherical, and the specific use method is the same as that of embodiment 2.

Example 7

As shown in fig. 4(f), in the present embodiment, a first bile duct support is selected, and the present embodiment is similar to embodiment 4, except that the head displacement prevention structure is in a single pigtail shape, the head pigtail is disposed at the same side as the tail barb hole, and the specific use method is the same as that in embodiment 1.

Example 8

As shown in fig. 4(g), in the present embodiment, a first bile duct support is selected, and the present embodiment is similar to embodiment 7, except that the head displacement prevention structure only has side wings, and the specific use method is the same as that in embodiment 1.

Example 9

As shown in fig. 4(h), in the present embodiment, a first bile duct stent is selected, which is similar to embodiment 4, except that the head anti-displacement structures are side wings, and the tail anti-displacement structures are spherical, and the specific use method is the same as that of embodiment 2.

Example 10

As shown in fig. 5(a), in this embodiment, the bile duct stent is selected according to the second scheme, and the rest technical features and the using method are the same as those described in the technical scheme of the embodiment 1.

Example 11

As shown in fig. 5(b), in this embodiment, the bile duct stent is selected according to the second scheme, and the remaining technical features and the using method are the same as those described in the technical scheme of embodiment 2.

Example 12

As shown in fig. 5(c), in this embodiment, the bile duct stent is selected according to the second scheme, and the remaining technical features and the using method are the same as those described in the technical scheme of embodiment 3.

Example 13

As shown in fig. 5(d), in this embodiment, the bile duct stent is selected according to the second scheme, and the remaining technical features and the using method are the same as those described in the technical scheme of embodiment 4.

Example 14

As shown in fig. 5(e), in this embodiment, the bile duct stent is selected according to the second scheme, and the remaining technical features and the using method are the same as those described in the technical scheme of the embodiment 5.

Example 15

As shown in fig. 5(f), in this embodiment, the bile duct stent is selected according to the second scheme, and the remaining technical features and the using method are the same as those described in the technical scheme of the embodiment 6.

Example 16

As shown in fig. 5(g), in this embodiment, the bile duct stent is selected according to the second scheme, and the rest of technical features and the using method are the same as those described in the technical scheme of embodiment 7.

Example 17

As shown in fig. 5(h), in this embodiment, the bile duct stent is selected according to the second scheme, and the rest of technical features and the using method are the same as those described in the technical scheme of embodiment 8.

Example 18

As shown in fig. 5(i), in this embodiment, a second bile duct stent is selected, and the rest of technical features and the using method are the same as those described in the technical scheme of embodiment 9.

Example 19

In the first embodiment, as shown in fig. 6(a), the pancreatic duct stent has a total length of 5-12 cm, an outer diameter of 5 and 7Fr, and an inner diameter of 4 and 6 Fr. In this embodiment, the displacement prevention structure is a side wing, and the specific use method is as follows: for a patient with high risk factors of pancreatitis after an ERCP (percutaneous transluminal coronary angioplasty) operation, a pancreatic duct is firstly inserted, a guide wire is kept after the insertion is successful, the device is placed under the guide of the guide wire, a cutting knife or a special propeller is used for pushing a pancreatic duct support into a pancreatic duct, when an agnail at the tail part of the pancreatic duct support is close to the sphincter of the papilla of duodenum, the propeller is fixed and the guide wire is withdrawn, the device is separated from the propeller, and the release of the pancreatic duct support is completed.

Example 20

As shown in fig. 6(b), in this embodiment, a first pancreatic duct stent is selected, and in this embodiment, the displacement prevention structure is a single pigtail type, and the specific use method is as follows: for patients with high risk factors of post-ERCP pancreatitis, the existing pancreatic duct intubation is characterized in that a guide wire is kept after successful intubation, the device is placed under the guide wire guide, a cutting knife or a special propeller is used for pushing a pancreatic duct support into a pancreatic duct, when barbs at the tail part of the pancreatic duct support are close to papillary sphincters, the propeller is fixed and is withdrawn from the guide wire to a soft part to enter the pancreatic duct support, a duodenoscope is pushed into the distal end of a duodenum, the head end of the duodenum is pressed downwards, the tail end of the pancreatic duct support is pushed into the distal end of the duodenum by the propeller, and the guide wire is completely withdrawn.

Example 21

As shown in fig. 6(c), in the present embodiment, the first pancreatic duct support is selected, and in the present embodiment, the anti-displacement structure is spherical and is composed of four duct walls. The propeller is a single-channel tube. The outer sleeve is a single-channel tube, and the tail part of the pancreatic duct bracket and the propeller can be arranged in the outer sleeve. The specific using method comprises the following steps: for the patients with high risk factors for pancreatitis after ERCP operation, firstly, the pancreatic duct is intubated, after the intubatton succeeds, the guide wire is retained, under the guide of the guide wire, the pancreatic duct bracket and the propeller are successively placed, then the pancreatic duct bracket and the propeller are placed into the outer sleeve, the assembled device is placed into the pancreatic duct under the guide of the guide wire, when the head end of the outer sleeve is exposed, the propeller is fixed, the outer sleeve is pulled back, and the tail part of the pancreatic duct bracket naturally forms a sphere. Under the guidance of the guide wire, the pancreatic duct bracket is continuously pushed by using the propeller, the spherical tail part of the pancreatic duct bracket is close to the duodenal papilla, the propeller is fixed and exits from the guide wire, and the pancreatic duct bracket is separated from the propeller to finish the release of the pancreatic duct bracket. The longitudinal clefts and the elliptical side holes on the wall of the drainage tube can fully drain pancreatic juice, the spherical tail part has the function of preventing the stent from shifting in the stent, and the pancreatic tube stent can automatically fall off under the action of intestinal peristalsis.

Example 22

As shown in fig. 7(a), in this example, the pancreatic duct stent is selected as the second option, and the remaining technical features and the use method are the same as those described in the technical solution of example 19.

Example 23

As shown in fig. 7(b), in this example, the pancreatic duct stent is selected as the second option, and the remaining technical features and the use method are the same as those described in the technical solution of example 20.

Example 24

As shown in fig. 7(c), in this example, the pancreatic duct stent is selected as the second option, and the remaining technical features and the use method are the same as those described in the technical solution of example 21.

Example 25

As shown in fig. 8(a), in the first embodiment, the total length of the nasobiliary tube is 150-200 cm, the outer diameters of the nasobiliary tube include 7, 8.5, and 10Fr, and the corresponding inner diameters include 5, 6.5, and 8 Fr. The nasobiliary duct of this embodiment has an arcuate head and a tail with a loop-like structure comprising a duodenal loop and a pyloric loop. The specific use method of the embodiment is as follows: after ERCP operation, the guide wire is retained in the bile duct, the device is placed in the bile duct through the duodenum clamp channel under the guide of the guide wire, when the second metal ring enters the tail end of the common bile duct, the guide wire and the duodenoscope are withdrawn, and the device is placed in the nasal bile duct, the duodenum section and the pyloric section of the nasal bile duct are loops, finally the oral-nasal conversion of the nasal bile duct is completed, and the nasal bile duct is fixed and connected with a bag for drainage.

Example 26

As shown in fig. 8(b), the first nasobiliary tube option, which is similar to example 25, differs from the first nasobiliary tube option in that the head is in the shape of a single pigtail. This example was used in the same manner as example 25.

Example 27

As shown in fig. 8(c), the first nasobiliary tube option, this embodiment is similar to example 25 except that the head is in the shape of a single pigtail and the tail has a loop-like structure. This example was used in the same manner as example 25.

Example 28

As shown in fig. 8(d), the first alternative for nasobiliary duct, this embodiment is similar to embodiment 25 except that the head is formed into a spherical shape with four curved walls. This example was used in the same manner as example 25.

Example 29

As shown in fig. 8(e), the first alternative for nasobiliary duct, this embodiment is similar to embodiment 25 except that the head is formed into a sphere by four curved walls and the tail has a loop-like structure. This example was used in the same manner as example 25.

Example 30

As shown in fig. 9(a), in this embodiment, the second nasobiliary tube is selected, and the rest of the technical features and the using method are the same as those described in the technical solution of embodiment 25.

Example 31

As shown in fig. 9(b), in this embodiment, the second nasobiliary tube is selected, and the rest of the technical features and the using method are the same as those described in the technical solution of embodiment 26.

Example 32

As shown in fig. 9(c), in this embodiment, the second nasobiliary tube is selected, and the rest of the technical features and the using method are the same as those described in the technical solution of embodiment 27.

Example 33

As shown in fig. 9(d), in this embodiment, the second nasobiliary tube is selected, and the rest of the technical features and the using method are the same as those described in the technical solution of embodiment 28.

Example 34

As shown in fig. 9(e), in this embodiment, the second nasobiliary tube is selected, and the rest of the technical features and the using method are the same as those described in the technical solution of embodiment 29.

The outer sleeve, the propeller, the spherical structure and the like in the above embodiments can be selected from the prior art.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A effectual drainage tube for ERCP operation of drainage, its characterized in that includes: consecutive head, drainage portion and afterbody, the drainage portion includes the gap pipeline section, the gap pipeline section includes the arc pipe wall that 3 at least specifications are the same, and the distance between the adjacent arc pipe wall is the same for a plurality of drainage gap sectional areas that form between the adjacent strip pipe wall are the same, the both sides of arc pipe wall are equipped with the recess, and the recess of adjacent pipe wall forms oval side opening, under the operating condition, the head stretches into in treating the pipeline of drainage.

2. The ERCP surgical drainage tube with good drainage effect according to claim 1, wherein the drainage part comprises a slit tube section and a complete tube section which are arranged at intervals, and the longitudinal positions of the slit tube section and the slit of the slit tube section adjacent to the interval complete tube section are in the same straight line or not.

3. The utility model provides an effectual ERCP drainage tube for operation of drainage, its characterized in that, includes consecutive head, drainage portion and afterbody, drainage portion includes the gap pipeline section, the gap pipeline section includes the arc pipe wall, the arc of arc pipe wall is the major arc, and the minor arc side rather than matching is the rip of indulging, is equipped with a plurality of oval side openings of walking the shape from last to lower spiral on the arc pipe wall, under the operating condition, the head stretches into in treating the pipeline of drainage.

4. The ERCP surgical drainage tube with good drainage effect according to claim 3, wherein said drainage portion comprises a slit tube section and a complete tube section which are arranged at intervals, the slit tube section and the next slit tube section adjacent to the interval complete tube section are spirally configured, so that the adjacent slits are spirally arranged.

5. The drainage tube for ERCP operation with good drainage effect according to any one of claims 1 to 4, wherein a first metal ring is arranged between the slit tube section and the head and/or a second metal ring is arranged between the slit tube section and the tail.

6. The drainage tube with good drainage effect for ERCP operation according to claim 5, wherein the drainage tube is an external drainage tube, specifically a nasobiliary drainage tube, and in working condition, the head and the drainage part are placed in the bile duct, and the tail is extended out of the body.

7. The ERCP drainage tube with good drainage effect of claim 6, wherein the head and/or the tail comprises an anti-displacement structure, the anti-displacement structure of the head comprises a ball shape and a pigtail shape, the anti-displacement structure of the tail comprises a duodenal loop and a pyloric loop which are arranged on the drainage side and matched with the shapes of duodenum and pylorus, and the tail end of the tail is a linear tube.

8. The drainage tube for ERCP operation with good drainage effect according to claim 5, wherein the drainage tube is an internal drainage tube, specifically a bile duct stent, in the working state, the head part and the drainage part are placed in the bile duct, the tail part is close to the duodenal papilla, the outer diameter of the bile duct stent is 7-10Fr, and correspondingly, the inner diameter is 5-8 Fr.

9. The drainage tube for ERCP operation with good drainage effect of claim 8, wherein the head and/or the tail comprises an anti-displacement structure, the anti-displacement structure of the head comprises a sphere, a flank and a pigtail, and the anti-displacement structure of the tail comprises a sphere, a flank and a pigtail.

10. The drainage tube for ERCP operation with good drainage effect as claimed in claim 5, wherein said drainage tube is an internal drainage tube, specifically a pancreatic duct stent, in the working state, said head and drainage portion are placed in the pancreatic duct, said tail portion is close to the duodenal papilla, said pancreatic duct stent has an outer diameter of 5, 7Fr, correspondingly, its inner diameter is 4, 6Fr, said tail portion includes an anti-displacement structure, said anti-displacement structure includes a flank, a flank and a sphere, a flank and a pigtail.