CN212522674U

CN212522674U - Single-pigtail multi-stage expansion type drainage tube

Info

Publication number: CN212522674U
Application number: CN202020767268.9U
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: 2020-05-11
Filing date: 2020-05-11
Publication date: 2021-02-12
Anticipated expiration: 2030-05-11

Abstract

The utility model provides a single pigtail multistage expanding drainage tube, which comprises a drainage tube and an inner core, wherein the drainage tube comprises a first drainage tube section, a second drainage tube section and a third drainage tube section; a first channel is arranged in the first drainage pipe section; a second channel, a third channel, a fourth channel and a fifth channel are arranged in the second drainage pipe section; the outer wall of the second drainage tube section is sleeved with the first balloon, the second balloon and the third balloon; a sixth channel, a seventh channel, an eighth channel and a ninth channel are arranged in the third drainage pipe section, and a first connecting joint is arranged at the tail of the sixth channel; the pipe wall of the third drainage pipe section is provided with a second connector, a third connector and a fourth connector; the tail end of the inner core is connected with the first connector; the inner core is inserted into the first connecting head and penetrates out of the first channel; the first drainage pipe section is connected with a traction wire, and the traction wire sequentially passes through the first channel and the second channel and is led out from the sixth channel and the third drainage pipe section. The utility model discloses multiplicable fistula way or urethra expansion range reduce the drainage tube and change the number of times, shorten the course of disease.

Description

Single-pigtail multi-stage expansion type drainage tube

Technical Field

The utility model relates to a wicresoft medical technology and surgical instruments technical field particularly, especially, relate to a multistage expanding drainage tube of single pigtail, for being used for percutaneous through the liver bile duct puncture and fistulous way expansion back treatment biliary tract system disease's minimal access surgery apparatus, or be used for expanding percutaneous through the liver bile duct puncture fistulous way treatment biliary tract system disease's minimal access surgery apparatus, or be used for the minimal access surgery apparatus of narrow expansion of urethra and urine drainage.

Background

Calculus of gallbladder and intrahepatic and extrahepatic bile ducts is a common disease and can induce complications such as acute and chronic cholecystitis, cholangitis, obstructive jaundice, biliary tumors and the like. The traditional treatment modes of gallstones are abdominal cholecystectomy and liver lobe resection, and the laparoscopic and choledochoscope technology is increasingly developed nowadays, and the cholecystotomy and the biliary tract exploration lithotomy under the laparoscope become important means for treating the gallstones.

The cholecystotomy under laparoscopy or the exploration of the biliary tract is required to be performed under general anesthesia. For the elderly and high-risk patients who can not tolerate the general anesthesia risk and the patients who receive a plurality of laparotomy operations, percutaneous transhepatic cholecystectomy and bile duct puncture drainage can be adopted firstly, then the fistula tract is gradually expanded, and when the fistula tract is expanded to more than 16Fr, a choledochoscope can be placed through the fistula tract to enter the gallbladder and lithotript in the duct. Fistulous tract expansion comprises two modes, wherein one mode is that different types of hard expansion tubes are used for expanding the fistulous tract in one operation, but the mode still needs to be completed under the general anesthesia state, complications such as bleeding, liver abscess and gallbladder leakage easily occur, the other mode is that a biliary tract drainage tube with a thicker type is replaced discontinuously, anesthesia is not needed in the mode, but the interval between two operations is longer, so that the disease treatment time is longer. If the interval time is shorter or a drainage tube with a thicker model is selected, the pain of the patient is increased, and the difficulty of tube placement is also increased.

The urinary catheter is a common clinical medical instrument, is placed into the bladder through the external orifice of the urethra to drain urine to the outside of the body, has the main functions of accurately recording urine volume, facilitating drainage, flushing and the like, and plays an important role in clinic.

The catheter applied at present is mainly made of silica gel, rubber, EVA, PVC and the like, and the catheter body is softer. For patients with symptoms such as urethral stricture, prostatic hyperplasia, prostatitis, prostate tumor, and urethral injury, the internal diameter, the running and the bending degree of the urethra change. The conventional urethral catheterization in-process resistance is great, needs to use great strength, and violence intubate not only brings huge misery for the patient, causes secondary urethra damage even easily, such as false way, hemorrhage, perforation etc. and then has aggravated the severity of urethra disease, has influenced the healing of urethra, leads to the urethra damage and the stenosis of complexity even, has seriously influenced patient's quality of life. For the patients outlined above, in order to increase the success rate of indwelling catheters and reduce the incidence of complications, a drainage catheter may be placed under the guidance of a guidewire. The prior catheter mostly adopts a tube body with a closed front end and an open back end, wherein a side opening is communicated with a catheter cavity, when the guide wire is put in, the guide wire is led out from the side opening of the catheter through the tube cavity, and the head end of the urinary catheter is not parallel to the guide wire, thus leading to difficult guide and failure of indwelling urinary catheter.

Even if the catheter can be placed into a small-sized urinary catheter, the drainage effect is poor, and the urinary retention is easy to occur again after the catheter is pulled out. In order to keep the spontaneous urination smooth, urethral dilation is often required for the above-mentioned patients. The conventional method adopted at present is to expand the urethra by a metal urethra dilator, multiple urethra dilations from small size to large size are mostly adopted, and then a thick ureter is inserted for supporting for a long time so as to promote the healing of injured mucous membrane.

SUMMERY OF THE UTILITY MODEL

The fistulous tract is dilated by using different types of hard dilatation tubes in one operation, but the method still needs to be completed in a general anesthesia state, and complications such as bleeding, liver abscess, gallbladder leakage and the like easily occur; the biliary tract drainage tube with a thicker model is replaced discontinuously, anesthesia is not needed in the method, but the interval between two operations is longer, so that the disease treatment time is longer, if the interval time is shorter or the drainage tube with the thicker model is selected, the pain of a patient is increased, and the difficulty of tube placement is also increased; the conventional method adopted by the conventional urethral dilatation is to dilate the urethra by a metal urethral dilator, multiple urethral dilations from small size to large size are mostly adopted, and then a thick urethral tube is inserted for supporting for a long time so as to promote the healing of injured mucous membrane. The utility model mainly utilizes the single-loop type front end drainage tube to prevent the drainage tube from shifting; the multi-balloon design is adopted, so that the expansion range of the fistula tract is enlarged, the expansion range of urethral stricture is enlarged, and the times of replacing the drainage tube are reduced; the sacculus takes the intussusception mode fixed, by inside to outside each sacculus of filling gradually, realizes fistulous way or urethral expansion step by step, reduces fistulous way and expands the risk of tearing hemorrhage fast, and painful reaction is little, can not cause the emergence of urethral mucosa's tearing and scar repair secondary stenosis that leads to yet.

The utility model discloses a technical means as follows:

a single pigtail multi-stage expandable drainage tube comprising: the drainage tube comprises a first drainage tube section, a second drainage tube section and a third drainage tube section which are sequentially communicated;

the first drainage tube section is a single-channel loop tube, and a first channel is arranged in the first drainage tube section; the tube wall of the first drainage tube section is provided with three elliptical side holes, and the three side holes are communicated with the first channel and used for discharging bile or urine;

the second drainage pipe section is a four-channel drainage pipe, a second channel, a third channel, a fourth channel and a fifth channel which are communicated with the first channel are arranged in the second drainage pipe section, and the head ends of the third channel, the fourth channel and the fifth channel are dead ends;

the outer wall of the second drainage pipe section is concave, and is sequentially sleeved with a first balloon, a second balloon and a third balloon which are intussuscepted from inside to outside, the two ends of the first balloon, the second balloon and the third balloon are conical, and the middle body is cylindrical;

a first through hole, a second through hole and a third through hole are formed in the pipe wall of the second drainage pipe section and are respectively communicated with the third channel, the fourth channel and the fifth channel; the head end of the third channel is communicated with the first balloon through a first through hole, the head end of the fourth channel is communicated with the second balloon through a second through hole, and the head end of the fifth channel is communicated with the third balloon through a third through hole;

the third drainage pipe section is a four-channel drainage pipe, and a sixth channel, a seventh channel, an eighth channel and a ninth channel which are communicated with the second channel are arranged in the third drainage pipe section; the tail part of the sixth channel is provided with a single-channel first connecting head communicated with the second channel; the tail ends of the seventh channel, the eighth channel and the ninth channel are blind ends,

the tail pipe wall of the third drainage pipe section is provided with a second connector, a third connector and a fourth connector which are single-channel and are respectively communicated with the tail ends of the seventh channel, the eighth channel and the ninth channel; the surfaces of the first connector, the second connector, the third connector and the fourth connector are provided with single-channel valves, and the surfaces are provided with first spiral grooves;

the tail end of the inner core is provided with a connecting cap, the inner wall of the connecting cap is provided with a second spiral groove, and the second spiral groove is connected with the first spiral groove on the outer wall of the first connecting head in a matched manner; the body of the inner core is inserted into the channel in the first connector and penetrates out of the first channel;

the outer side of the pipe wall at the front end of the first drainage pipe section is connected with a traction wire, the traction wire enters the first channel through a fourth through hole formed in the end wall of the first drainage pipe section, sequentially passes through the first channel and the second channel, enters the sixth channel, and is led out through the sixth channel and a fifth through hole formed in the pipe wall at the end of the third drainage pipe section; a traction line clamping groove is formed in the pipe wall of the third drainage pipe section, the clamping groove is a U-shaped groove, and a protruding edge is formed in the surface of the clamping groove; the clamping groove is provided with a U-shaped buckle for fixing the traction wire, the surface of the buckle is parallel and level, and the embedded buckle is fixed through the protruding edge.

Further, the length of the first balloon is 30-60 cm, the second balloon is longer than the first balloon by 1cm, and the third balloon is longer than the second balloon by 1 cm;

the head ends of the first balloon, the second balloon and the third balloon are flush and are fixed with the tube wall of the second drainage tube section through a first metal ring;

the tail ends of the first balloon, the second balloon and the third balloon are respectively fixed with the tube wall of the second drainage tube section through a second metal ring, a third metal ring and a fourth metal ring.

Further, the second connector is connected with a syringe or a pressure pump, and is gradually filled with saline containing a contrast agent to slowly fill the first balloon to dilate the fistula;

the third connector and the fourth connector are connected with a syringe or a pressure pump, physiological saline containing a contrast agent is gradually injected, the second balloon and the third balloon are slowly filled, and the second balloon and the third balloon with larger diameters are used for dilating a fistula;

the first connector is connected with the drainage bag to drain bile or urine.

Furthermore, the inner core is a support tube or a combination of a puncture needle and the support tube;

resistance blocks are arranged on two sides of the head end of the supporting tube and are connected with the inner wall of the first channel in a matched mode; the supporting tube is a single-channel metal tube, and the body is cylindrical; the tail end of the supporting tube is provided with a first connecting cap which is a single-channel connecting cap; the spiral groove that the inner wall of first connecting cap was equipped with is second spiral groove.

Further, when the inner core is a support tube, the connection cap is the first connection cap, and the support tube is connected with the first connector through the matching connection of the second spiral groove and the first spiral groove;

when the inner core is a supporting tube, the inner core is used for expanding the fistula in the percutaneous transhepatic cholangiotomy approach or gradually expanding the urethral stricture and draining urine.

Further, when the inner core is a combination of a puncture needle and a support tube, a third spiral groove is formed in the outer wall of the first connecting cap on the support tube, a second connecting cap is arranged at the tail end of the puncture needle, a fourth spiral groove is formed in the inner wall of the second connecting cap, the fourth spiral groove is connected with the third spiral groove in a matched mode, and the middle body of the puncture needle is arranged in a channel of the support tube;

the connecting cap is a combination of the first connecting cap and the second connecting cap;

the top of the puncture needle is in a conical tip shape, and the middle body is in a cylindrical shape;

when the inner core is the combination of the puncture needle and the supporting tube, the inner core is used for directly carrying out percutaneous transhepatic bile duct and gall bladder puncture and simultaneously expanding a fistula tract.

Further, when the device is used for gradual expansion and urine drainage of urethral stricture, the length of the drainage tube is 40cm, and the tube diameter is 8-12 Fr;

the first balloon has a length of 30cm and the first, second and third balloons have expanded diameters of 12Fr, 14Fr and 16Fr, or 18Fr, 20Fr and 22Fr, or 24Fr, 26Fr and 28Fr, respectively.

Further, when the device is used for expanding the fistula in the percutaneous transhepatic cholangiotomy approach, the length of the drainage tube is 60-100 cm, the outer diameter is 7Fr, and the inner diameter is 5 Fr;

the expanded diameters of the first, second and third balloons are 14Fr, 16Fr and 18Fr, respectively.

Further, the length of the drainage tube is 60-100 cm, the outer diameter is 7Fr, and the inner diameter is 5 Fr;

the expanded diameters of the first balloon, the second balloon and the third balloon are 8Fr, 10Fr and 12Fr, respectively.

The blind end refers to that the head end of the water injection channel and the gas injection channel is L-shaped and is connected with the sacculus cavity through a through hole arranged on the tube wall of the drainage tube.

Compared with the prior art, the utility model has the advantages of it is following:

1. the utility model provides a multistage expanding drainage tube of single pigtail, structure, manufacturing, operation, nursing are all more simple, both can be used for the fistula to say the expansion, also can be used to the urethra expansion.

2. The utility model provides a multistage expanding type drainage tube of single pigtail, when the inner core was the combination of pjncture needle and stay tube, the local anesthesia down can with this device directly get into bile duct or gall-bladder through skin puncture in, simplified operation flow, need not to use seal wire and pjncture needle, practiced thrift operating time and medical cost, avoided conventional puncture in-process bile to get into the abdominal cavity and arouse complications such as bellyache.

3. The utility model provides a multistage expanding drainage tube of single pigtail, when the inner core was the stay tube, can take the drainage tube to expand the fistula way of percutaneous transhepatic bile duct puncture route.

4. When the inner core of the single-pigtail multistage expanding drainage tube is the supporting tube, the drainage tube can also be adopted to carry out gradual expansion and urine drainage on urethral stricture; the device can be placed into the urethra under the guidance of the guide wire, the operation is simpler, and the secondary injury of the urethra can not be caused; the hardness of the device is higher than that of a conventional urinary catheter, the pipe diameter is thinner, the head end is tapered, a supporting pipe is arranged in the device, and the device is easy to pass through stenosis.

5. When the single-pigtail multistage expanding drainage tube is applied to a fistula tract, the model is 7Fr, and the single-pigtail multistage expanding drainage tube is easy to place in the fistula tract; when the inner core is the combination of the puncture needle and the support tube, the drainage tube of the model is easy to puncture into the gall bladder or the bile duct.

6. The utility model provides a single pig tail multistage expanding drainage tube, the front end drainage tube is single loop type, which has the function of preventing the drainage tube from shifting; the fixing property is good, the durability is strong, and the long-time use cannot cause abrasion and damage; the side hole is combined, the drainage effect is better, and the circulation of bile is not influenced.

7. The utility model provides a multistage expanding type drainage tube of single pigtail adopts many sacculus designs, has increased the fistula and has said the scope of expansion, also can increase the scope of the narrow expansion of urethra, has reduced the number of times of changing the drainage tube.

8. The utility model provides a multistage expansion type drainage tube of single pigtail, sacculus take the intussusception mode fixed, by inside to outer each sacculus of filling gradually, can realize fistulous way or urethral expansion step by step, reduced fistulous way and said the risk of tearing hemorrhage of expanding fast, and painful reaction is little, can not cause the urethra mucous membrane tear and the narrow emergence of the scar repair secondary that causes yet.

9. The utility model provides a multistage expanding type drainage tube of single pigtail, every sacculus has fixed diameter, can reach the expansion diameter under less pressure, and is little to the pressure requirement, easy operation, and the cost of manufacture is low.

In conclusion, the technical scheme of the utility model can solve the problem that the fistulous tract is expanded by using hard expansion tubes with different types in one operation in the prior art, but the method still needs to be completed in a general anesthesia state, and complications such as bleeding, liver abscess, gallbladder leakage and the like are easy to occur; the biliary tract drainage tube with a thicker model is replaced discontinuously, anesthesia is not needed in the method, but the interval between two operations is longer, so that the disease treatment time is longer, if the interval time is shorter or the drainage tube with the thicker model is selected, the pain of a patient is increased, and the difficulty of tube placement is also increased; the conventional method adopted by the conventional urethral dilatation is to dilate the urethra by a metal urethral dilator, multiple urethral dilations from small size to large size are mostly adopted, and then a thick urethral tube is inserted for supporting for a long time so as to promote the healing of injured mucous membrane.

Based on the above reasons, the utility model can be widely popularized in the fields of minimally invasive medical technology, surgical instruments and the like.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art are 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 inventive labor.

Fig. 1 is a schematic structural view of a single pigtail multistage expanding drainage tube in embodiment 1 of the present invention.

Fig. 2 is a schematic structural view of a single pigtail multi-stage expandable drainage tube in examples 2 and 3 of the present invention.

Fig. 3 is a schematic structural view of a drainage tube in the embodiment of the present invention.

Fig. 4 is a cross-sectional view taken along line a-a of fig. 3.

Fig. 5 is a cross-sectional view taken along line B-B of fig. 3.

Fig. 6 is a cross-sectional view taken along line C-C in fig. 3.

Fig. 7 is a cross-sectional view taken along line D-D in fig. 3.

Fig. 8 is a cross-sectional view taken along line E-E of fig. 3.

Fig. 9 is a sectional view taken along line F-F in fig. 3.

Fig. 10 is a schematic structural view of a puncture needle according to an embodiment of the present invention.

Fig. 11 is a schematic structural view of a support tube according to an embodiment of the present invention.

Fig. 12 is a schematic view of the single pigtail multi-stage dilating drainage tube with a balloon in the working state (the first balloon is full) according to the embodiment of the present invention.

Fig. 13 is a schematic view of the multi-stage dilating drainage tube with balloon at the tail of a pig according to the embodiment of the present invention in working condition (the first balloon is full and the traction wire is tightened).

Fig. 14 is a schematic view of the multi-stage dilating drainage tube with balloon for single pigtail in the embodiment of the present invention under working condition (the first balloon and the second balloon are full and the traction wire is tightened).

Fig. 15 is a schematic view of the single pigtail multi-stage dilating drainage tube with a balloon in the embodiment of the present invention in the working state (the first balloon, the second balloon and the third balloon are full, and the traction wire is tightened).

In the figure: 1. a first drain tube section; 2. a second drain tube section; 3. a third drain tube section; 4. puncturing needle; 5. supporting a tube; 6. a pull wire; 7. buckling;

11. a first channel; 12. a side hole;

21. a second channel; 22. a third channel; 23. a fourth channel; 24. a fifth channel; 25. a first balloon; 26. a second balloon; 27. a third balloon; 28. a first metal ring; 29. a second metal ring; 210. a third metal ring; 211. a fourth metal ring;

31. a sixth channel; 32. a seventh channel; 33. an eighth channel; 34. a ninth channel; 35. a first connector; 36. a second connector; 37. a third connector; 38. a fourth connector; 39. a syringe or a pressure pump.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying 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. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1-15, the utility model provides a single pigtail multistage expanding drainage tube, include: the drainage tube comprises a first drainage tube section 1, a second drainage tube section 2 and a third drainage tube section 3 which are sequentially communicated;

the first drainage tube section 1 is a single-channel loop tube, and a first channel 11 is arranged in the first drainage tube section; the tube wall of the first drainage tube section 1 is provided with three elliptical side holes 2, and the three side holes 2 are communicated with the first channel 11 and used for discharging bile or urine;

the second drainage pipe section 2 is a four-channel drainage pipe, a second channel 21, a third channel 22, a fourth channel 23 and a fifth channel 24 which are communicated with the first channel 11 are arranged in the four-channel drainage pipe, and the head ends of the third channel 22, the fourth channel 23 and the fifth channel 24 are blind ends;

the outer wall of the second drainage tube section 2 is concave, and is sequentially sleeved with a first balloon 25, a second balloon 26 and a third balloon 27 which are intussuscepted from inside to outside, the two ends of the first balloon 25, the second balloon 26 and the third balloon 27 are conical, and the middle body is cylindrical;

a first through hole, a second through hole and a third through hole are formed in the pipe wall of the second drainage pipe section 2 and are respectively communicated with the third channel 22, the fourth channel 23 and the fifth channel 24; the head end of the third passage 22 communicates with the first balloon 25 through a first passage hole, the head end of the fourth passage 23 communicates with the second balloon 26 through a second passage hole, and the head end of the fifth passage 24 communicates with the third balloon 27 through a third passage hole;

the third drainage pipe section 3 is a four-channel drainage pipe, and a sixth channel 31, a seventh channel 32, an eighth channel 33 and a ninth channel 34 which are communicated with the second channel 21 are arranged in the drainage pipe; the tail part of the sixth channel 31 is provided with a single-channel first connecting head 35 communicated with the second channel 21; the end of the seventh channel 32, the eighth channel 33 and the ninth channel 34 is blind,

a second connector 36, a third connector 37 and a fourth connector 38 which are single channels are arranged on the pipe wall at the tail part of the third drainage pipe section 3 and are respectively communicated with the tail ends of the seventh channel 32, the eighth channel 33 and the ninth channel 34; the surfaces of the first connector 35, the second connector 36, the third connector 37 and the fourth connector 38 are all provided with single-channel valves, and the surfaces are provided with first spiral grooves;

a connecting cap is arranged at the tail end of the inner core, a second spiral groove is formed in the inner wall of the connecting cap, and the second spiral groove is connected with the first spiral groove in the outer wall of the first connecting head 35 in a matched mode; the body of the inner core is inserted into the channel in the first connector 35 and penetrates out of the first channel 11;

the outer side of the pipe wall at the front end of the first drainage pipe section 1 is connected with a traction wire 6, the traction wire 6 enters the first channel 11 through a fourth through hole formed in the end wall of the first drainage pipe section 1, sequentially passes through the first channel 11 and the second channel 21, enters the sixth channel 31, and is led out through the sixth channel 31 and a fifth through hole formed in the pipe wall at the end of the third drainage pipe section 3; a traction line clamping groove is formed in the pipe wall of the third drainage pipe section 3, the clamping groove is a U-shaped groove, and a protruding edge is formed in the surface of the clamping groove; the clamping groove is provided with a U-shaped buckle 7 for fixing the traction wire 6, the surface of the buckle 7 is flush, and the embedded buckle 7 is fixed through the protruding edge.

Preferably, the length of the first balloon 25 is 30-60 cm, the second balloon 26 is longer than the first balloon 25 by 1cm, and the third balloon 27 is longer than the second balloon 26 by 1 cm;

the head ends of the first balloon 25, the second balloon 26 and the third balloon 27 are flush and are all fixed with the tube wall of the second drainage tube section 2 through a first metal ring 28;

the tail ends of the first balloon 25, the second balloon 26 and the third balloon 27 are respectively fixed with the tube wall of the second drainage tube section 2 through a second metal ring 29, a third metal ring 210 and a fourth metal ring 211.

Preferably, the second connector 36 is connected with a syringe or a pressure pump 39, and is gradually filled with saline containing contrast agent, and the first balloon 25 is slowly filled to expand the fistula tract;

the third connector 37 and the fourth connector 38 are connected with a syringe or a pressure pump 39, and are gradually filled with saline containing contrast agents, so that the second balloon 26 and the third balloon 27 are slowly filled, and the fistula is dilated by using the second balloon 26 and the third balloon 27 with larger diameters;

the first connector 35 is connected with the drainage bag to drain bile or urine.

Preferably, the inner core is a support tube 5 or a combination of the puncture needle 4 and the support tube 5;

resistance blocks are arranged on two sides of the head end of the support tube 5 and are connected with the inner wall of the first channel 11 in a matched manner; the supporting tube 5 is a single-channel metal tube, and the body of the supporting tube is cylindrical; the tail end of the supporting tube 5 is provided with a first connecting cap which is a single-channel connecting cap; the spiral groove that the inner wall of first connecting cap was equipped with is second spiral groove.

Preferably, when the inner core is a support tube 5, the connection cap is the first connection cap, and the support tube 5 is connected with the first connection head 35 through the matching connection of the second spiral groove and the first spiral groove;

when the inner core is the supporting tube 5, the catheter is used for expanding the fistula in the percutaneous transhepatic cholangiotomy approach or gradually expanding the urethral stricture and carrying out urine drainage.

Preferably, when the inner core is a combination of the puncture needle 4 and the support tube 5, a third spiral groove is formed in the outer wall of the first connecting cap on the support tube 5, a second connecting cap is arranged at the tail end of the puncture needle 4, a fourth spiral groove is formed in the inner wall of the second connecting cap, the fourth spiral groove is connected with the third spiral groove in a matched mode, and the middle body of the puncture needle 4 is arranged in a channel of the support tube 5;

the top of the puncture needle 4 is in a conical tip shape, and the middle body is in a cylindrical shape;

when the inner core is the combination of the puncture needle 4 and the support tube 5, the inner core is used for directly carrying out percutaneous transhepatic bile duct and gall bladder puncture and simultaneously expanding a fistula tract.

Preferably, when the drainage tube is used for gradual expansion and urine drainage of urethral stricture, the length of the drainage tube is 40cm, and the tube diameter is 8-12 Fr;

the first balloon 25 has a length of 30cm, and the expanded diameters of the first balloon 25, the second balloon 26, and the third balloon 27 are 12Fr, 14Fr, and 16Fr, or 18Fr, 20Fr, and 22Fr, or 24Fr, 26Fr, and 28Fr, respectively.

Preferably, when the device is used for expanding the fistula in the percutaneous transhepatic cholangiotomy approach, the length of the drainage tube is 60-100 cm, the outer diameter is 7Fr, and the inner diameter is 5 Fr;

the expanded diameters of the first balloon 25, the second balloon 26, and the third balloon 27 are 14Fr, 16Fr, and 18Fr, respectively.

Preferably, the length of the drainage tube is 60-100 cm, the outer diameter is 7Fr, and the inner diameter is 5 Fr;

the expanded diameters of the first balloon 25, the second balloon 26, and the third balloon 27 are 8Fr, 10Fr, and 12Fr, respectively.

Example 1

The multistage expanding drainage tube of single pigtail in this embodiment can directly implement percutaneous transhepatic bile duct and gall-bladder puncture, expands fistulous way simultaneously, includes: the drainage tube comprises a first drainage tube section 1, a second drainage tube section 2 and a third drainage tube section 3 which are sequentially communicated;

the first drainage tube section 1 is a single-channel loop tube and is internally provided with a first channel 11; the tube wall of the first drainage tube section 1 is provided with three elliptical side holes 2, and the three side holes 2 are communicated with the first channel 11 and used for discharging bile; the single-channel loop pipe is an arc loop in a natural state and is similar to a head of a question mark in structure, when the supporting pipe and the puncture needle are placed in use, the head end loop pipe is linear, the supporting pipe and the puncture needle are withdrawn after the single-channel loop pipe is placed in a bile duct, if the bile duct is thick, the head end of the first drainage pipe section 1 can be a loop naturally, but if the diameter of the bile duct is smaller than the outer diameter of the loop pipe, the head end of the first drainage pipe section 1 can only be an arc hook in the bile duct, and the head end is pulled into the arc loop by tightening a traction wire. In addition, during the indwelling period, if the thread is not tightened, the natural loop has poor anti-displacement capability, the drainage tube can be automatically pulled out, but after the thread is pulled into an arc loop, the loop at the head end is fixed, so that the drainage tube cannot be pulled out; the head end of the drainage tube is in a loop shape through a traction wire to achieve the fixing effect;

the second drainage pipe section 2 is a four-channel drainage pipe, a second channel 21, a third channel 22, a fourth channel 23 and a fifth channel 24 which are communicated with the first channel 11 are arranged in the four-channel drainage pipe, and the head ends of the third channel 22, the fourth channel 23 and the fifth channel 24 are dead ends;

the pipe wall of the second drainage pipe section 2 is provided with a first through hole, a second through hole and a third through hole which are respectively communicated with a third channel 22, a fourth channel 23 and a fifth channel 24; the tube wall is the tube wall wrapped by the saccule on the second drainage tube section 2; the head end of the third passage 22 communicates with the first balloon 25 through the first passage hole, the head end of the fourth passage 23 communicates with the second balloon 26 through the second passage hole, and the head end of the fifth passage 24 communicates with the third balloon 27 through the third passage hole;

the third drainage pipe section 3 is a four-channel drainage pipe, and a sixth channel 31, a seventh channel 32, an eighth channel 33 and a ninth channel 34 which are communicated with the second channel 21 are arranged in the drainage pipe; the tail part of the sixth channel 31 is provided with a single-channel first connecting head 35 communicated with the second channel 21; the ends of the seventh 32, eighth 33 and ninth 34 channels are blind,

the tail pipe wall of the third drainage pipe section 3 is provided with a second connector 36, a third connector 37 and a fourth connector 38 which are single-channel and are respectively communicated with the tail ends of the seventh channel 32, the eighth channel 33 and the ninth channel 34; the surfaces of the first connector 35, the second connector 36, the third connector 37 and the fourth connector 38 are all provided with single-channel valves, and the surfaces are provided with first spiral grooves;

the tail end of the inner core is provided with a connecting cap, the inner wall of the connecting cap is provided with a second spiral groove, and the second spiral groove is matched and connected with the first spiral groove on the outer wall of the first connecting head 35; the body of the inner core is inserted into the channel in the first connector 35 and penetrates out of the first channel 11;

the outer side of the pipe wall at the front end of the first drainage pipe section 1 is connected with a traction wire 6, the traction wire 6 enters the first channel 11 through a fourth through hole formed in the end wall of the first drainage pipe section 1, sequentially passes through the first channel 11 and the second channel 21, enters the sixth channel 31, and is led out through the sixth channel 31 and a fifth through hole formed in the pipe wall at the end of the third drainage pipe section 3; a traction line clamping groove is formed in the pipe wall of the third drainage pipe section 3, the clamping groove is a U-shaped groove, and a protruding edge is formed in the surface of the clamping groove; u type buckle 7 has been put on the draw-in groove for fixed pull wire 6, buckle 7's surface parallel and level fixes buckle 7 of putting into through the outstanding edge.

In this embodiment, the first balloon 25 is 60cm in length, the second balloon 26 is 1cm longer than the first balloon 25, and the third balloon 27 is 1cm longer than the second balloon 26; wherein the expanded diameters of the first balloon 25, the second balloon 26 and the third balloon 27 are 8Fr, 10Fr and 12Fr, respectively;

the head ends of the first balloon 25, the second balloon 26 and the third balloon 27 are flush and are fixed with the wall of the second drainage tube section 2 through a first metal ring 28;

the tail ends of the first balloon 25, the second balloon 26 and the third balloon 27 are fixed with the tube wall of the second drainage tube section 2 through a second metal ring 29, a third metal ring 210 and a fourth metal ring 211 respectively.

In this example, the length of the draft tube was 100cm, the outer diameter was 7Fr and the inner diameter was 5 Fr.

In this embodiment, the inner core is a combination of a puncture needle 4 and a support tube 5, as shown in fig. 1.

Resistance blocks are arranged on two sides of the head end of the supporting tube 5 and are connected with the inner wall of the first channel 11 in a matching way; the supporting tube 5 is a single-channel metal tube, and the body is cylindrical; the tail end of the supporting tube 5 is provided with a first connecting cap which is a single-channel connecting cap; the spiral groove arranged on the inner wall of the first connecting cap is a second spiral groove.

The outer wall of the first connecting cap on the supporting tube 5 is provided with a third spiral groove, the tail end of the puncture needle 4 is provided with a second connecting cap, the inner wall of the second connecting cap is provided with a fourth spiral groove, the fourth spiral groove is matched and connected with the third spiral groove, and the middle body of the puncture needle 4 is arranged in a channel of the supporting tube 5;

the connecting cap is a combination of a first connecting cap and a second connecting cap;

the top of the puncture needle 4 is in a conical tip shape, and the middle body is in a cylindrical shape.

After the device is placed into a designated position of a bile duct or a gall bladder by percutaneous puncture under the guidance of ultrasound, the needle core and the supporting tube 5 are withdrawn, the traction wire 6 is tightened, the head end of the drainage tube is in a loop shape, and the traction wire 6 is fixedly led out through a buckle 7. The second connector 36 is connected with a syringe or a pressure pump 39, and is gradually filled with physiological saline containing contrast agent to slowly fill the first balloon 25 to dilate a fistula tract; the contrast-containing saline is then gradually injected through a syringe or pressure pump 39 connected to the third and

fourth connectors

37 and 38, respectively, slowly filling the second and

third balloons

26 and 27, and dilating the fistula tract using the larger diameter second and third balloons 26 and 27 (the first, second and

third balloons

25, 26 and 27 are placed in the fistula tract). The first connector 35 is connected with the drainage bag to drain bile. Adopt the utility model discloses can directly implement percutaneous transhepatic bile duct and gall bladder puncture, carry out the scheme that expands to the fistula way simultaneously, multiplicable fistula says the expansion range, reduces the drainage tube and changes the number of times, shortens the course of disease, just the utility model discloses the cost of manufacture is low.

Example 2

The single pigtail multistage dilatation drainage tube of the embodiment is used for dilating a fistula tract in a percutaneous transhepatic cholangiotomy approach and comprises the following steps: the drainage tube comprises a first drainage tube section 1, a second drainage tube section 2 and a third drainage tube section 3 which are sequentially communicated;

the first drainage tube section 1 is a single-channel loop tube and is internally provided with a first channel 11; the tube wall of the first drainage tube section 1 is provided with three elliptical side holes 2, and the three side holes 2 are communicated with the first channel 11 and used for discharging bile;

In this embodiment, the first balloon 25 is 30cm in length, the second balloon 26 is 1cm longer than the first balloon 25, and the third balloon 27 is 1cm longer than the second balloon 26; wherein the expanded diameters of the first balloon 25, the second balloon 26 and the third balloon 27 are 14Fr, 16Fr and 18Fr, respectively;

In this example, the length of the draft tube was 60cm, the outer diameter was 7Fr and the inner diameter was 5 Fr.

In this embodiment, the inner core is a support tube 5, as shown in fig. 2.

In this embodiment, the connection cap is a first connection cap, and the support tube 5 is connected to the first connection head 35 through the matching connection of the second spiral groove and the first spiral groove.

The guide wire is placed in through the original drainage tube under the monitoring of ultrasonic or X-ray, the guide wire is left and the original drainage tube is withdrawn, the device is placed in under the guidance of the guide wire, the device is placed in the appointed position (expansion position) of the bile duct through the skin, the traction wire 6 is tightened, the head end of the drainage tube is in a loop shape, and the traction wire 6 is fixed and led out through a buckle 7. The second connector 36 is connected with a syringe or a pressure pump 39, and is gradually filled with physiological saline containing contrast agent to slowly fill the first balloon 25 to dilate a fistula tract; the contrast-containing saline is then gradually injected through a syringe or pressure pump 39 connected to the third and

fourth connectors

37 and 38, respectively, slowly filling the second and

third balloons

25, 26 and 27 are placed in the fistula tract). The first connector 35 is connected with the drainage bag to drain bile. Adopt the utility model discloses fistula way to percutaneous transhepatic bile duct puncture way carries out the scheme that expands, and multiplicable fistula way expansion range reduces the drainage tube and changes the number of times, shortens the course of disease, just the utility model discloses the cost of manufacture is low.

Example 3

The multistage expanding type drainage tube of single pigtail of this embodiment expands and urine drainage step by step to urethral stricture, include: the drainage tube comprises a first drainage tube section 1, a second drainage tube section 2 and a third drainage tube section 3 which are sequentially communicated;

the first drainage tube section 1 is a single-channel loop tube and is internally provided with a first channel 11; the tube wall of the first drainage tube section 1 is provided with three elliptical side holes 2, and the three side holes 2 are communicated with the first channel 11 and used for discharging urine;

In this embodiment, the first balloon 25 is 30cm in length, the second balloon 26 is 1cm longer than the first balloon 25, and the third balloon 27 is 1cm longer than the second balloon 26; wherein the expanded diameters of the first balloon 25, the second balloon 26 and the third balloon 27 are 12Fr, 14Fr and 16Fr, or 18Fr, 20Fr and 22Fr, or 24Fr, 26Fr and 28Fr, respectively;

In this embodiment, the length of the draft tube is 40cm, and the tube diameter is 8-12 Fr.

In this embodiment, the inner core is a support tube 5, as shown in fig. 2.

During clinical operation, a guide wire is firstly placed into the bladder through the external urethral orifice, the urethral dilation drainage tube provided with the supporting tube is placed into the bladder under the guidance of the guide wire, the supporting tube 5 is withdrawn, the traction wire 6 is tightened, the head end is a loop, the traction wire 6 is fixed through the buckle 7, and then the guide wire is withdrawn. The second connector 36 is connected with a syringe or a pressure pump 39, and is gradually filled with physiological saline containing contrast agent, and the cylindrical first saccule 25 is slowly filled to dilate urethral stricture; then, a syringe or a pressure pump 39 is respectively connected with the third connector 37 and the fourth connector 38, the contrast agent-containing physiological saline is gradually injected, the second balloon 26 and the third balloon 27 are slowly filled, and the second balloon 26 and the third balloon 27 with larger diameters are used for dilating urethral stricture (the first balloon 25, the second balloon 26 and the third balloon 27 are put into the urethra); the first connector 35 is connected to the drainage bag for draining urine. Adopt the utility model discloses expand the scheme of urine drainage step by step to the urethral stricture, multiplicable urethral stricture expansion scope reduces the drainage tube and changes the number of times, shortens the course of illness, just the utility model discloses the cost of manufacture is low.

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; although the present invention has been described in detail with reference to the foregoing embodiments, it should 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; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. The utility model provides a multistage expanding type drainage tube of single pigtail which characterized in that includes: the drainage tube comprises a drainage tube and an inner core arranged in the drainage tube, wherein the drainage tube comprises a first drainage tube section (1), a second drainage tube section (2) and a third drainage tube section (3) which are sequentially communicated;

the first drainage tube section (1) is a single-channel loop tube, and a first channel (11) is arranged in the first drainage tube section; the tube wall of the first drainage tube section (1) is provided with three elliptical side holes (12), and the three side holes (12) are communicated with the first channel (11);

the second drainage pipe section (2) is a four-channel drainage pipe, a second channel (21), a third channel (22), a fourth channel (23) and a fifth channel (24) which are communicated with the first channel (11) are arranged in the four-channel drainage pipe, and the head ends of the third channel (22), the fourth channel (23) and the fifth channel (24) are dead ends;

the outer wall of the second drainage tube section (2) is concave, a first balloon (25), a second balloon (26) and a third balloon (27) which are intussuscepted are sequentially sleeved from inside to outside, two ends of the first balloon (25), the second balloon (26) and the third balloon (27) are conical, and the middle body is cylindrical;

a first through hole, a second through hole and a third through hole are formed in the pipe wall of the second drainage pipe section (2) and are respectively communicated with a third channel (22), a fourth channel (23) and a fifth channel (24); the head end of the third passage (22) communicates with the first balloon (25) through a first passage hole, the head end of the fourth passage (23) communicates with the second balloon (26) through a second passage hole, and the head end of the fifth passage (24) communicates with the third balloon (27) through a third passage hole;

the third drainage pipe section (3) is a four-channel drainage pipe, and a sixth channel (31), a seventh channel (32), an eighth channel (33) and a ninth channel (34) which are communicated with the second channel (21) are arranged in the four-channel drainage pipe; a single-channel first connecting head (35) communicated with the second channel (21) is arranged at the tail part of the sixth channel (31); the tail ends of the seventh channel (32), the eighth channel (33) and the ninth channel (34) are blind ends,

a second connector (36), a third connector (37) and a fourth connector (38) which are single channels are arranged on the pipe wall of the tail part of the third drainage pipe section (3) and are respectively communicated with the tail ends of the seventh channel (32), the eighth channel (33) and the ninth channel (34); the surfaces of the first connector (35), the second connector (36), the third connector (37) and the fourth connector (38) are all provided with single-channel valves, and the surfaces are provided with first spiral grooves;

a connecting cap is arranged at the tail end of the inner core, a second spiral groove is formed in the inner wall of the connecting cap, and the second spiral groove is connected with the first spiral groove in the outer wall of the first connecting head (35) in a matched mode; the body of the inner core is inserted into the channel in the first connector (35) and penetrates out of the first channel (11);

a traction wire (6) is connected to the outer side of the tube wall at the front end of the first drainage tube section (1), the traction wire (6) enters the first channel (11) through a fourth through hole formed in the end wall of the first drainage tube section (1), sequentially passes through the first channel (11) and the second channel (21), enters the sixth channel (31), and is led out through the sixth channel (31) and a fifth through hole formed in the tube wall at the tail end of the third drainage tube section (3); a traction line clamping groove is formed in the pipe wall of the third drainage pipe section (3), the clamping groove is a U-shaped groove, and a protruding edge is formed in the surface of the clamping groove; the clamping groove is provided with a U-shaped buckle (7) for fixing the traction wire (6), the surface of the buckle (7) is flush, and the embedded buckle (7) is fixed through the protruding edge.

2. The single pigtail multi-stage expandable drain according to claim 1 wherein the first balloon (25) has a length of 30-60 cm, the second balloon (26) is 1cm longer than the first balloon (25), and the third balloon (27) is 1cm longer than the second balloon (26);

the head ends of the first balloon (25), the second balloon (26) and the third balloon (27) are flush and are fixed with the wall of the second drainage tube section (2) through a first metal ring (28);

the tail ends of the first balloon (25), the second balloon (26) and the third balloon (27) are respectively fixed with the tube wall of the second drainage tube section (2) through a second metal ring (29), a third metal ring (210) and a fourth metal ring (211).

3. The single pigtail multistage dilatation catheter according to claim 1 or 2, wherein the second connector (36) is connected to a syringe or a pressure pump (39) and gradually filled with saline containing a contrast agent to slowly fill the first balloon (25) to dilate the fistula tract;

the third connector (37) and the fourth connector (38) are connected with a syringe or a pressure pump (39), and are gradually filled with saline containing contrast agent, the second balloon (26) and the third balloon (27) are slowly filled, and the fistula tract is expanded by using the second balloon (26) and the third balloon (27) with larger diameters;

the first connector (35) is connected with the drainage bag.

4. The single pigtail multistage dilating drainage tube of claim 3, wherein the inner core is a support tube (5), or a combination of a puncture needle (4) and a support tube (5);

resistance blocks are arranged on two sides of the head end of the supporting tube (5), and the resistance blocks are connected with the inner wall of the first channel (11) in a matched mode; the supporting tube (5) is a single-channel metal tube, and the body of the supporting tube is cylindrical; the tail end of the supporting tube (5) is provided with a first connecting cap which is a single-channel connecting cap; the spiral groove that the inner wall of first connecting cap was equipped with is second spiral groove.

5. The single pigtail multistage dilating drainage tube of claim 4, wherein when the inner core is a support tube (5), the connection cap is the first connection cap, and the support tube (5) is connected to the first connector (35) by the mating connection of the second spiral groove and the first spiral groove;

when the inner core is the supporting tube (5), the catheter is used for expanding the fistula in the percutaneous transhepatic cholangiotomy approach or gradually expanding the urethral stricture and carrying out urine drainage.

6. The single pigtail multistage dilation type drainage tube according to claim 4, wherein when the inner core is a combination of a puncture needle (4) and a support tube (5), the outer wall of the first connection cap on the support tube (5) is provided with a third spiral groove, the tail end of the puncture needle (4) is provided with a second connection cap, the inner wall of the second connection cap is provided with a fourth spiral groove, the fourth spiral groove is matched and connected with the third spiral groove, and the middle body of the puncture needle (4) is arranged in the channel of the support tube (5);

the top of the puncture needle (4) is in a conical tip shape, and the middle body is in a cylindrical shape;

when the inner core is the combination of the puncture needle (4) and the support tube (5), the inner core is used for directly carrying out percutaneous transhepatic cholangial and gallbladder puncture and simultaneously expanding fistula.

7. The single pigtail multistage dilatation type drainage tube of claim 5, wherein when used for stepwise dilatation and urinary drainage of urethral stricture, the drainage tube has a length of 40cm and a tube diameter of 8-12 Fr;

the first balloon (25) has a length of 30cm, and the first balloon (25), the second balloon (26) and the third balloon (27) have expanded diameters of 12Fr, 14Fr and 16Fr, or 18Fr, 20Fr and 22Fr, or 24Fr, 26Fr and 28Fr, respectively.

8. The single pigtail multistage dilation type drainage tube according to claim 5, wherein when used for dilating a fistula tract in a percutaneous transhepatic cholangiopuncture approach, the drainage tube has a length of 60-100 cm, an outer diameter of 7Fr and an inner diameter of 5 Fr;

the expanded diameters of the first balloon (25), the second balloon (26), and the third balloon (27) are 14Fr, 16Fr, and 18Fr, respectively.

9. The single pigtail multistage expanding drainage tube of claim 6, wherein the length of the drainage tube is 60-100 cm, the outer diameter is 7Fr, and the inner diameter is 5 Fr;

the expanded diameters of the first balloon (25), the second balloon (26), and the third balloon (27) are 8Fr, 10Fr, and 12Fr, respectively.