54 results about "Biliary drainage" patented technology

The invention belongs to the technical field of medical apparatus and instruments, and in particular relates to a multi-purpose nasal biliary drainage tube. The multi-purpose nasal biliary drainage tube comprises a drainage tube section I, a drainage tube section II, a drainage tube section III, a drainage tube section IV, a drainage tube section V and a drainage tube section VI, wherein the drainage tube section I is of straight line type, the drainage tube section II is spiral, and a channel I in the drainage tube section II communicates with the drainage tube section I; the center of the drainage tube section III is bent, the formed angle alpha is 30-45 degrees, a channel III in the drainage tube section III communicates with the channel I, and a channel IV in the drainage tube sectionIII communicates with a channel II; the center of the drainage tube section IV is bent, the formed angle beta is 60-90 degrees, and the drainage tube section IV communicates with the channel III; thecenter of the drainage tube section V is bent, the formed angle gamma is 60-120 degrees, and a channel V of the drainage tube section V communicates with the channel III; the drainage tube section VIis of straight line type, a channel VII in the drainage tube section VI communicates with the channel V, and a channel VIII in the drainage tube section VI communicates with the channel VI. The multi-purpose nasal biliary drainage tube can be widely popularized and applied in the fields including endoscope treatment for the diseases including hepatobiliary and pancreatic diseases.

The invention discloses a biliary excretion experimental animal model and a building method, belonging to the technical field of life science. A guinea pig is selected as an animal model; the gall bladder of the guinea pig is ligatured so that the bile directly enters into the common bile duct instead of being stored in the gall bladder after being secreted from the liver. The common bile duct is intubated so that the bile is drained to a 5ml of centrifuge tube for follow-up analysis. The model operation process is simple and quick and has high success rate; and the biliary excretion experimental animal model is an ideal experimental animal model for researching biliary excretion as far as the biotechnology medicine, such as interferon, etc and experimental animal model taking guinea pig as medical activity.

The invention discloses a spiral internal biliary drainage tube, which comprises a spiral tube, wherein a plurality of through holes I are arranged on the outer wall of the spiral tube; the spiral tube is 7-11cm long, the spiral tube is 1-2mm in inner diameter, the spiral tube is 4-5mm in outer diameter, the spiral tube includes 2-5 cycles and the spiral tube is 5-8.5Fr in pipe diameter. The spiral tube disclosed by the invention has an anti-sliding function, and the spiral internal biliary drainage tube is low in probability of internal displacement or takeoff; the drainage tube is capable of preventing biliary wall mucosa from being adsorbed on and from blocking the through holes I and is conducive to the drainage of infectious thick bile; the bile is discharged into duodena through the through holes I and the inner cavity of the spiral tube, and the bile also flows out through an inner cavity formed by the spiral tube; the main body of the spiral tube has an effect on compressing stones in common bile duct; the drainage tube, when preventing the stones in the common bile duct from displacing, can bring about a friction effect on the stones through the sidewall thereof, so that the volume of the stones is diminished to create conditions for secondary stone removal through ERCP (endoscopic retrograde cholangiopancreatography).

The invention discloses a biliary drainage device. The biliary drainage device comprises an outer drainage tube and an inner drainage tube, as well as a connecting tube for communicating the outer drainage tube and the inner drainage tube, wherein the outer drainage tube and the inner drainage tube are attached and connected in a length direction; the far end of the outer drainage tube is sealed, and a plurality of drainage side holes are formed in the wall of the tube; an outer drainage valve port and a check valve are arranged on the connecting tube; and by virtue of the check valve, the outer drainage tube and the inner drainage tube communicate in a unidirectional mode. The biliary drainage device disclosed by the invention is unnecessary to place a stent inside the biliary tract and is convenient for replacing; a long-term drainage tube for a biliary tract obstruction section can be constructed for a patient; in addition, since bile can be led into duodenum through the inner drainage tube, the biliary drainage device can relieve influence on appetite and health of a patient, so that liver and gall functions of the patient can recover rapidly. In addition, by virtue of the check valve which is arranged on the connecting tube, the regurgitation of intestinal juice is avoided, so that such complications as cholangitis are relieved.

The invention discloses a percutaneous transhepatic implanted multifunctional biliary drainage device. The percutaneous transhepatic implanted multifunctional biliary drainage device comprises a drainage tube, a flexible expansion stent, radioactive particle strips and a development mark part, wherein the flexible expansion stent is arranged at the right end part of the drainage tube; the radioactive particle strips are arranged on the flexible expansion stent; the development mark part is arranged on the drainage tube at two sides of the flexible expansion stent and is developed under imagingequipment; first drainage holes are formed in the drainage tube at the left side of the flexible expansion stent; and second drainage holes are formed in the drainage tube at the right side of the flexible expansion stent. The percutaneous transhepatic implanted multifunctional biliary drainage device has the advantages that the expansion stent is integrated on the drainage tube, a flexible airbag can expand an obstructive site while meeting bile drainage, and radioactive particles on the flexible airbag can carry out radiation therapy on tumor tissues at the obstructive site at the same time, so that the carrying time of patients is effectively shortened; the drainage tube can be linear and meets the requirements of bile drainage, obstruction expansion and tumor tissue treatment of single duct obstruction; and the drainage tube can be of a Y-shaped structure, and meets the treatment requirements of the patients with hilar biliary duct obstruction.

The invention discloses a drainage device. The drainage device comprises a drainage assembly and a negative-pressure assembly. The drainage assembly comprises a drainage tube, more than one drainage port, a hard catheter and a fixing ball. The drainage tube is communicated with the drainage ports. The hard catheter penetrates through the drainage ports to be connected with the drainage tube. The fixing ball is detachably connected to the opening of the hard catheter. An exhaust tube is arranged on the lower surface of the drainage tube and communicated to the drainage tube in a bent mode. The negative-pressure assembly comprises a negative-pressure tube, a negative-pressure connector and an air bag, wherein the negative-pressure tube is connected to the lower surface of the drainage tube and communicated with the drainage tube. When the drainage device is applied to drainage, operation is easy and convenient, multi-layer drainage can be achieved, blockage will not be caused easily, and the drainage speed and the drainage pressure can be monitored; meanwhile, the inside of a drainage bag can be kept in a negative-pressure state all the time, so that the drainage operation can be smoothly carried out, a solid foundation is laid for draining materials in the body thoroughly, and the work intensity of medical workers is reduced to a certain degree.

The invention discloses a biliary drainage pipe. The biliary drainage pipe comprises a drainage pipe body arranged with a drainage channel; and a drainage hole, which is used for allowing communication between the drainage channel and the external space of drainage pipe body, is arranged at the front end of the drainage pipe body. Thus, when the front end of the drainage pipe body is placed insidethe liver and the gallbladder, draining and rinsing can be performed on the interiors of the liver and the gallbladder through the drainage hole and the drainage channel. Moreover, an airbag is arranged, between the drainage hole of the drainage pipe body and the tail end of the drainage pipe body, on the outer wall; and an gas supply passage communicating with the airbag is further arranged inside the drainage pipe body, so that, inflation of the airbag can be realized through the gas supply passage after the front end of the drainage pipe body is placed inside the liver and the gallbladder,thereby allowing gradual expanded enlargement of the airbag under the action of internal gases. Thus, the interiors of the the liver and the gallbladder are extruded by the extrusion of the airbag soas to achieve certain fixing effects on the drainage pipe body, so that, the problem of accidental slippage of the drainage pipe during retention period can be effectively avoided. In addition, the airbag in the expanded state also has certain dilatation effects on the fistulas; and thus, preparation is done for stage-two surgery.

The invention relates to the technical field of medical apparatus and instruments, and particularly discloses a biliary drainage tube fixing device for post-orthotopic liver transplantation. The biliary drainage tube fixing device for post-orthotopic liver transplantation comprises a cross belt, wherein the cross belt is fixedly connected with a left pull belt and a right pull belt; two fixing buckles, a fixing seat and a buckling portion are fixedly arranged on the outer surface of the cross belt; the cross belt has an inflatable air bag structure; an air inlet is formed in the upper surfaceof the cross belt; a rotating groove is formed in the fixing seat; a rotating seat is placed in the rotating groove; the fixing seat and the rotating seat are connected through a clamping device; a groove is formed in the bottom of the rotating seat; tooth grains are arranged on the inner side wall of the groove; a buckle is fixedly arranged on the upper surface of the rotating seat; a sliding groove is formed in the bottom of the fixing seat; a sliding block is placed in the sliding groove; the right end of the sliding groove is elastically connected with the right side surface of the slidinggroove through a spring; and a vertical clamping block is fixed on the upper surface of the sliding block. The biliary drainage tube fixing device for post-orthotopic liver transplantation has the advantages of convenience in mounting, simplicity in structure, convenience in operation, safety and reliability, adjustable angle of a flow distributing body, and capability of greatly relieving pain of a patient.

A catheter has a double-action retention mechanism with (a) one retention mechanism having a reinforced retention body transformable into a deployed flower-like configuration when the catheter is inserted in the bodily cavity, and (b) a stabilizer securing the catheter to a patient's body to maintain a stable position. The retention mechanism for securing the catheter in the bodily cavity is configured with a thickened or reinforced wall portions of the retention body. The inner channel of the catheter body is wider than conventional catheters, thus attaining better drainage and better fluid flow. Due to the reinforced flower configuration, an inadvertent removal of the catheter with the flower configuration fully deployed will afflict no significant damage. When the catheter is to be removed, the catheter's body is disengaged from the stabilizer and the flower configuration of the retention mechanism retention body controllably collapses, thus transforming the catheter to a configuration suitable for removal of the catheter from the bodily cavity. The improved Catheter is simple in operation, safe, prevents from CAUTI, and provides a non-residual urine drainage and high flow rate.

The present invention provides an assembly for urinary drainage. The assembly comprises a urinary drainage device for collecting urine from a body opening and a collecting bag for collecting the urine. The collecting bag comprises a compartment between sheets of a foil material and an inlet into the compartment, wherein the inlet is connected to the device such that a urinary flow can be established in a flow path from the device through the inlet and into the compartment. The collecting bag further comprises a flow promoting element arranged between the sheets and having flow promoting properties. The collecting may also comprise suction means for providing suction through a flow path in the collecting bag.

The invention discloses an endobiliary drainage stent implanted through a choledochoscope, including a drainage stent, wherein one end surface of the drainage stent is fixed with an anti-falling arm;one side of the anti-falling arm is provided with a graduation mark relative to the inside of the drainage stent, and the other end surface of the drainage stent is provided with a first side hole; one side of the first side hole is provided with a second side hole, the opposite surface of the first side hole is provided with a fourth side hole; and the opposite surface of the second side hole isprovided with a third side hole. The endobiliary drainage stent implanted through a choledochoscopethe is routinely placed after exploration of the common bile duct, at the completion of the placement, the opening of the common bile duct can be directly sutured without long-term T tube, and the external drainage is changed into the internal drainage under the physiological condition, so that bileloss is avoided, and the quality of life of the patient is obviously improved, and the biliary drainage is ensured, and the jaundice is reduced after the operation, and the liver function is protected, and the probability of bile leakage after the direct suture of the bile duct is greatly reduced.

The present invention provides an admission passage system which has an operational duct assembly. The duct assembly is configured to provide an admission passage to a target vessel and guide the target vessel for follow-up treatment. The admission passage system comprises an adjustable transmission handle assembly and an admission passage pipe sub assembly which has an operational admission passage duct configured to be transmitted to a target position (such as the duodenum) so as to assist in the treatment of diseases (such as bile duct drainage through endoscopic ultrasonography guided biliary tract drainage (EUS-BD)). The admission passage duct comprises at least a far side section which has an adjustable part along the length direction. The adjustable part is configured to be converted to a preset arc shape so as to provide a direction control for the far end of the duct when guiding the adjustable part to pass through a pulse duct (such as bile duct). The handle assembly comprises other elements which are configured to permit clinicians to control and operate the far end of the admission passage duct.

The invention discloses an anti-displacement biliary internal drainage tube and an implantation device. The anti-displacement biliary internal drainage tube comprises a head end, a first tube section,a second tube section and a tail end which are communicated in turn by a lumen. The first pipe section includes a plurality of arcuate pipe walls uniformly distributed about an axis of the first pipesection and protruding in a direction away from the axis of the first pipe section, two ends of the arcuate pipe walls are respectively connected with a lower end of the head end and an upper end ofthe second pipe section. The first tube segment of the invention comprises a plurality of arc-shaped tube walls, which naturally take on a spherical shape after being released, and exerts an anti-displacement effect by generating elastic tension on the bile duct wall; a plurality of transverse protrusions are arranged in the middle region of the outside of the arc-shaped tube wall to strengthen the anti-displacement effect of the internal biliary drainage tube.

The invention discloses an integrated bile-pancreatic juice drainage tube, which includes a water bladder type bile external drainage tube and a pancreatic juice internal drainage tube. The water bladder type bile external drainage tube includes drainage tube section I, drainage tube section II and drainage tube section connected in sequence III, the outer wall of the drainage tube section II is sleeved with a balloon film; the pancreatic juice internal drainage tube includes a drainage tube body, a cap, and a tail of the drainage tube, and the end of the drainage tube section III that is far away from the drainage tube section II is connected to the The drain tube tails match. The present invention has strong tension, can prevent the prolapse of the water bladder type bile external drainage tube, is suitable for bile ducts of various diameters, has no damage to the bile duct mucosa, duodenal papilla and upper gastrointestinal mucosa, and is effective in preventing water The displacement of the cystic external bile drainage tube will not cause biliary obstruction, and the internal pancreatic juice drainage tube is connected with the water cystic bile external drainage tube through a thread, which can prevent the internal displacement or prolapse of the pancreatic juice internal drainage.

The invention discloses a reflux-preventing biliary drainage tube. The drainage tube includes a drainage hose, and the drainage hose is divided into an extracorporeal section, a sterile section in the bile duct, and a bacteria-bearing section in the digestive tract. Drainage holes are provided on the pipe wall of the bacterial section, medium diffusion holes are provided on the pipe wall of the bacterial section, and a one-way valve is provided between the sterile section and the bacterial section, and the one-way valve is controlled by the valve. body, a sphere and two elastic cords, wherein, the valve body is tubular, and one end facing the bacterial segment is provided with an inner chamfer, and one end of the two elastic cords is relatively fixed on the valve body facing On the inner wall of one end of the sterile section, the other end is combined and fixed at the same point on the surface of the sphere, and the sphere is always pulled into the inner chamfer to seal one end of the valve body; the inner chamfer is less than or equal to 30 degrees . The drainage tube can effectively prevent gastric juice or other contents from flowing back into the bile duct, and will not block the two-way passage of the guide wire in the drainage tube.

The invention discloses a biliary drainage tube with a verification channel. The biliary drainage tube comprises a tube body, wherein the tube body comprises two isolated channels including a main drainage channel and the verification channel, the main drainage channel and the verification channel are axial through tube bodies, the main drainage channel is provided with a main drainage hole, the verification channel is provided with a verification hole, and the main drainage hole and the verification hole are located in the head portion of the tube body and are not communicated in the tube body. The in-place situation of the biliary drainage tube can be verified in the biliary drainage tube feeding process, additional risks brought by re-puncture are avoided, the operation time is shortened, and patients' pain is relieved.

The invention discloses a biliary tract drainage seepage collecting device capable of reducing skin injury, and relates to the technical field of medical auxiliary equipment, the biliary tract drainage seepage collecting device comprises a flexible base plate, the flexible base plate is oblate, a through hole is formed in the circle center of the flexible base plate, a clamping head is fixed to one side of the flexible base plate, and the side, away from the clamping head, of the flexible base plate is coated with an adhesive coating; the middle part of one side, facing the flexible chassis, of the ostomy bag is communicated with a communicating pipe; the communicating pipe is mounted in the clamping head; a connecting pipe is installed between the first liquid discharging pipe and the liquid inlet pipe, one end of the connecting pipe is connected to the outer wall of the first liquid discharging pipe in a sleeving mode, and the other end of the connecting pipe is connected to the outer wall of the liquid inlet pipe in a sleeving mode. One end of the biliary drainage tube is located in the body and communicated with the biliary tract, and the other end of the biliary drainage tube extends out of the body and is inserted into the through hole. The biliary tract drainage exudate collecting device capable of reducing skin injury can effectively collect drainage exudate such as bile exudate from the drainage tube, so that skin injury caused by the bile is avoided, and the working efficiency of medical staff is improved.

The invention provides a reversed-a-shaped nasobiliary drainage tube. The drainage tube particularly is a single-channel pipe, and comprises a nasobiliary drainage tube head, a drainage part, a bent part and a leading-out part; the drainage part comprises a plurality of bile drainage holes; the reversed-a-shaped nasobiliary drainage tube is placed in a human body, the head of the nasobiliary drainage tube extends into a right hepatic duct, the bile drainage holes are close to the primary tube wall of a duodenum, and the bile drainage holes comprises middle holes and triangular holes connectedwith the middle holes and formed in the left sides and the right sides of the middle holes; the bent part is provided with a plurality of groups of bent corners to form a reverse a shape; and the leading-out part extends out of the human body and is connected with a drainage bag. Under the guide of a guide wire, the drainage tube can be easily placed into the intrahepatic bile duct through duodenal papilla, has a better anti-skid effect, is easy to pull out, and has small stimulation to the duodenal papilla.

The invention discloses a biliary drainage tube based on radioactive particle therapy, which relates to the technical field of medical instruments, solves the problems that an existing biliary drainage tube is complex in treatment process, too long in period, large in patient pain and the like, and is characterized in that the biliary drainage tube comprises a main drainage tube and two pigtail tubes, and side holes are formed in the outer walls of the pigtail tubes in a penetrating mode; a bag cavity is formed in the wall of the drainage main pipe and extends in the axis direction of the drainage main pipe. A bag is arranged in the bag cavity, and radioactive particles I125 are placed in the bag; the bag is provided with at least one separation section in the axis direction of the drainage main pipe, each separation section is formed by bonding the symmetrical inner walls of the bag, and the interior of the bag is divided into a plurality of containing cavities through the separationsections. The drainage tube has the advantages that obstruction is removed through drainage in time, tumors are treated through internal radiation, the treatment process is easy to operate, the treatment period is shortened, the pain of a patient is relieved, and the treatment effect of a PTCD technology is improved.

The invention discloses an external biliary drainage tube for preventing duodenal papilla hemorrhage and an implantation device thereof. The external biliary drainage tube for preventing duodenal papilla hemorrhage comprises a straight tube, a first drainage tube section, a second drainage tube section, a third drainage tube section and a fourth drainage tube section which are communicated in turnby a lumen. The straight pipe comprises a head end, a first straight pipe section and a second straight pipe section, wherein the head end is communicated with the lumen in turn; an upper end of thehead end is open, and a low end is provided with a head end through hole; the outer wall of the first straight tube section is sleeved with a balloon. The balloon was placed in the duodenal lumen andthe tension of the first drainage tube segment (spiral tube) was maintained by the drainage tube fixator, which could exert continuous pressure on the bleeding duodenal papilla and avoid the occurrence of acute pancreatitis caused by duodenal transient compression. To prevent the internal and external movement of the external biliary drainage tube to prevent the bleeding of the duodenal papilla through the balloon and the drainage tube fixator.

The invention discloses a bile-pancreatic juice drainage tube, which includes a loop-type bile external drainage tube and a pancreatic juice internal drainage tube. The loop-type bile external drainage tube includes straight tubes connected in sequence, an elastic loop tube I and an elastic loop tube II. The elastic loop tube I and the elastic loop tube II are in the shape of an Archimedes curve as a whole, and the pancreatic juice internal drainage tube includes a drainage tube body and a cap located at the upper end of the drainage tube body, and the drainage tube The tube body is provided with a line II, and the line II passes through the side wall of the straight tube and enters into the lumen of the straight tube. The invention reduces the slipping probability of the loop-type bile external drainage tube, has no stimulation to bile duct mucous membrane, duodenal papilla, gastrointestinal tract mucous membrane and throat mucous membrane, and has the effect of preventing displacement or prolapse of the pancreatic juice internal drainage tube.

The invention discloses a percutaneous intrahepatic bile duct-ascites shunt synchronous drainage tube. The drainage tube comprises a bile tube, the outer portion of the bile tube is sleeved with an ascites tube, two <-shaped branch tubes capable of being deformed by pulling of a pull wire are arranged at one end of the bile tube, the ends, away from the bile tube, of the two branch tubes are connected,and one end of the pull wire penetrates through the bile tube and one of the branch tubes and then penetrates through the bile tube to return to the outside of the drainage tube; a tube body of the ascites tube is provided with more than one compressible and extensible corrugated section, each corrugated section comprises a corrugated section A close to the section A of the bile tube and a corrugated section B close to a pipe opening of the ascites tube, and an ascites drainage opening is formed in the side wall of a corrugated piece of each corrugated section A; and a plurality of biliary drainage openings are formed in the section A of the bile tube and the branch tubes. The drainage tube is simple in structure, firm in fixation and flexible and convenient to use, and can achieve the function of simultaneously draining abdominal dropsy and bile by avoiding wounds caused by multiple punctures.

The invention discloses a wearing device for infection monitoring after biliary drainage operation, which comprises a fixed belt, a drainage tube and an electronic monitor, wherein: the fixed belt is connected to the housing of the electronic monitor; the lower bottom of the housing of the electronic monitor and the upper side are respectively provided with through holes through which the drainage tube passes through the electronic monitor; the electronic monitor includes a color sensing module and a gas sensing module. The invention can monitor the bile in the drainage tube, and send out an audible and visual alarm when the bile has abnormal smell and / or color, realizes infection monitoring and alarm, and reduces the postoperative risk of patients.

The invention discloses a local photodynamic therapy balloon drainage catheter system used in a biliary tract cavity, wherein the system is characterized by comprising a catheter; two balloons are arranged on the catheter, three channels which are not communicated with each other are arranged in the catheter, the three channels are respectively a filling cavity, a drainage cavity and a medicine injection cavity, and the catheter is provided with a liquid through hole for communicating the balloons with the filling cavity; a first side hole communicated with the drainage cavity is formed in the head end of the catheter, and a medicine injection hole communicated with the medicine injection cavity is formed in the position, between the two balloons, of the catheter; and a laser optical fiber with one end penetrating through the medicine injection hole is arranged in the medicine injection cavity. The biliary drainage catheter and the photodynamic therapy balloon are integrally designed, and the two balloons are designed, so that a drainage tube can be fixed, a tumor obstruction part can be accurately positioned, a photosensitizer is locally used, other parts of a body can be prevented from being damaged by photodynamic irradiation as far as possible, photodynamic therapy is accurately implemented, symptoms are relieved, and tumors are treated synchronously, so that the malignant obstructive jaundice is effectively treated in time.

The invention discloses a loop type bile external drainage tube, which comprises straight tubes connected in sequence, an elastic loop tube I and an elastic loop tube II, and the elastic loop tube I and the elastic loop tube II overall form an Archimedes curve shape, the side wall of the elastic loop tube I is provided with a through hole for accommodating the head of the elastic loop tube II, and the through hole is located in the plane where the Archimedes curve is located. the wire so that the head of the elastic haptic tube II enters the through hole. The present invention increases the tension of the elastic loop tube I on the bile duct wall when the thread is tightened, reducing the probability of slippage of the loop-type bile external drainage tube; No damage; in the process of pulling out the drainage tube, there is no stimulation to the bile duct mucosa, duodenal papilla, gastrointestinal mucosa and throat mucosa, and will not cause acute cholangitis, acute pancreas, upper gastrointestinal bleeding and other complications Symptoms; during the extubation process, the patient's reaction will also be greatly reduced.

The invention discloses a Y-type bile and pancreatic juice drainage tube with a water bladder, which comprises a water bladder type bile external drainage tube and an internal pancreatic juice drainage tube. The water bladder type bile external drainage tube includes drainage tube section I, drainage tube section II and drainage tube section Tube section III, the outer wall of the drainage tube section II is sleeved with a balloon film, the pancreatic juice internal drainage tube includes a drainage tube body and a cap I located at the upper end of the drainage tube body, the side of the drainage tube body The wall is connected with the side wall of the drainage tube section I through a connecting part. The present invention has the function of preventing the prolapse of the external drainage tube of the water bladder and preventing the displacement or prolapse of the internal drainage of pancreatic juice, and is suitable for bile ducts of various diameters, and is suitable for bile duct mucosa and duodenal papilla during insertion and removal. There is no damage to the upper gastrointestinal mucosa. While preventing the displacement of the water bladder external drainage tube, it will not cause biliary obstruction. When the water bladder external drainage tube is taken out, the pancreatic juice internal drainage tube can be removed at the same time.

A subcutaneous implantable biliary drainage tube, which includes a single-lumen drainage tube and an implanted infusion stand; it is characterized in that the implantable infusion set is detachably connected to the first end of the single-lumen drainage tube; the single-lumen drainage tube Including the front part, the middle part and the tail part of the body, an anti-reflux component is set in the front part of the body to avoid bile reflux. The stopper is set on the inner wall of the single-lumen drainage tube; the end of the tail section in the body is provided with an anti-falling component that prevents the I125 particles from falling off from the tail section of the body during normal use; the single-lumen drainage tube is also set to accommodate The containment structure of I125 particles for tumor radiotherapy; the invention effectively reduces the diameter of the drainage tube by designing a single-lumen drainage tube, and embeds the drainage tube by combining the implantable infusion stand and the single-lumen drainage tube Under the skin, it is convenient for patients to live a normal life after surgery.

The present disclosure provides an access system having a steerable catheter assembly configured to provide access to and guide a target vessel for subsequent treatment. The access system includes an adjustable delivery handle assembly and an access catheter subassembly having a steerable access catheter configured to be delivered to a target site (e.g., into the duodenum) for Adjunctive treatment of conditions (e.g. biliary drainage via endoscopic ultrasound-guided biliary drainage (EUS‑BD) techniques). The access catheter includes at least a distal segment having an adjustable portion along its length configured to transition into a predetermined arcuate shape in order to guide it through a vessel, such as a bile duct ), provide directional control to the distal end of the catheter. The handle assembly includes additional elements configured to allow the clinician to manipulate and manipulate the distal end of the access catheter.

The invention provides a recyclable biliary tract drainage tube coated stent. The recyclable biliary tract drainage tube coated stent comprises a coated stent, a drainage tube and a sleeve. The drainage tube comprises an outer drainage tube, a front drainage tube and a rear drainage tube, the front drainage tube is arranged at one end of the outer drainage tube, the rear drainage tube is arrangedat one end of the front drainage tube away from the outer drainage tube, the coated stent is arranged at the boundary between the front drainage tube and the rear drainage tube, the coated stent includes a stent and a coating, the stent is inserted into the drainage tube, the end of the conical part of the distal end of the stent is inserted into the side wall of the rear drainage tube, the coating is arranged on the outside of the stent in a sleeved mode, two ends of the coating are arranged on the outside of the drainage tube in a sleeved mode, the connection part between the coating and thedrainage pipe is provided with mesh-like through holes, the outer part of the coated stent is sleeved with the sleeve, the sleeve is sleeved outside the outer drainage tube and the front drainage pipe, and a plurality of drainage holes are arranged on the surface of the rear drainage tube. Beneficial effects of the invention are that: the biliary stricture site can be supported and the biliary leakage can be sealed and blocked while carrying out biliary drainage, and the invention is a recyclable stent device.