CN218606956U - A Y-shaped self-expandable metal stent for biliopancreatic duct - Google Patents

Abstract

The utility model provides a courage pancreatic duct Y type is from formula metal support that expands, including the inflation pipe fitting, the portion is put into including the bile duct portion of putting that is linked together, pancreatic duct portion of putting into and the portion is put into to the duodenum, the bile duct portion of putting into pancreas duct portion of putting into with the duodenum portion of putting into is the Y type and arranges, wherein the bile duct portion of putting into with the pancreatic duct portion of putting into contained angle is 90. This bile pancreatic duct Y type is from expanding formula metal support, through inflation pipe fitting expansion kettle belly stenosis obstruction position, the bile duct portion of putting into, the pancreas pipe portion of putting into and the duodenum of putting into of will communicating is put into patient's bile duct, pancreas pipe and duodenum and is put into in the portion correspondence, realizes carrying out the drainage to the bile in the patient's bile duct and the pancreatic juice in the pancreas in the same period, avoids twice operation, has reduced patient's misery.

Description

A Y-shaped self-expandable metal stent for biliopancreatic duct

technical field

The utility model relates to the technical field of medical devices, in particular to a Y-shaped self-expandable metal stent in the bile-pancreatic duct.

Background technique

Pancreaticoduodenectomy is the main treatment for ampulla tumors. Surgical ampulla resection or endoscopic duodenal papilla resection can also be used for some patients with early-stage tumors. Due to the rapid progression of such tumors, The prognosis is poor, and some patients with advanced tumors or those who do not wish to undergo surgery are treated conservatively. If the patient is complicated with obstructive jaundice, endoscopic retrograde cholangiopancreatography is often used and biliary stent drainage or percutaneous hepatic biliary drainage catheterization is performed; if the patient If combined with pancreatic duct obstruction, a pancreatic duct stent needs to be placed again.

Because patients with obstructive jaundice and pancreatic duct obstruction need to place two kinds of stents separately, there are often problems such as difficulty in stent placement and poor drainage effect. Some patients use percutaneous hepatic biliary drainage catheters because of bile loss and electrolyte imbalance. The problem is that some patients need repeated catheterization, or eventually have to undergo a very traumatic operation, which greatly affects the quality of life of the patient. Although the existing Y-shaped stent can achieve the drainage effect at the same time, the Y-shaped stent is placed due to the location. It is targeted and is not suitable for the drainage of bile and pancreatic juice. During use, it cannot effectively fit the common bile duct and pancreatic duct, and the position is unstable after insertion, which is prone to deviation and affects the drainage effect.

In summary, there is an urgent need for a Y-shaped self-expandable metal stent for the bile and pancreatic ducts that can simultaneously achieve drainage of bile and pancreatic juice, has a good drainage effect, and is stable in position after placement.

Utility model content

In order to solve the problems that the bile duct stent and the pancreatic duct stent cannot simultaneously realize the drainage of bile and pancreatic juice during the insertion process, the existing Y-shaped stent has poor drainage effect and the position is unstable after insertion, the utility model provides a Biliary and pancreatic duct Y-shaped self-expandable metal stent.

According to one purpose of the present utility model, the utility model provides a Y-type self-expandable metal stent for the bile duct and pancreatic duct, including: an expansion tube, the expansion tube includes a connected bile duct insertion part, a pancreatic duct insertion part and a twelve finger The intestinal insertion part, the biliary duct insertion part, the pancreatic duct insertion part and the duodenum insertion part are arranged in a Y shape, wherein the bile duct insertion part and the pancreatic duct insertion part clamp The angle is 90°.

Preferably, the ratio of the length of the biliary duct insertion part to the length of the pancreatic duct insertion part is 2:1.

Preferably, the diameter of the duodenum insertion part is larger than the diameter of the pancreatic duct insertion part, and the diameter of the duodenum insertion part is larger than the diameter of the bile duct insertion part.

Preferably, the sum of the diameters of the pancreatic duct insertion part and the diameter of the bile duct insertion part is not greater than the diameter of the duodenal insertion part.

Preferably, the expansion pipe is a braided mesh expansion pipe.

Preferably, the expansion pipe is an expansion pipe made of nickel-titanium shape memory alloy wire.

Preferably, the biliopancreatic duct Y-shaped self-expandable metal stent further includes an inner core, the inner core is embedded in the expansion tube, and the inner core is detachably connected to the expansion tube.

Preferably, the inner core includes three connected sections, the three sections are the bile duct section, the pancreatic duct section and the duodenum section, wherein the bile duct section corresponds to the bile duct insertion part The pancreatic duct segment is arranged corresponding to the pancreatic duct insertion part, and the duodenal segment is arranged corresponding to the duodenum insertion part.

Preferably, the expansion tube includes a first specification expansion tube or a second specification expansion tube;

In the expansion tube of the first specification, the diameter of the bile duct insertion part is 5 mm and the length is 60 mm, the diameter of the pancreatic duct insertion part is 3 mm and the length is 30 mm, and the diameter of the duodenum insertion part is 8mm, length 20mm;

In the expansion tube of the second specification, the diameter of the bile duct insertion part is 8 mm and the length is 80 mm, the diameter of the pancreatic duct insertion part is 5 mm, and the length is 40 mm, and the diameter of the duodenum insertion part is It is 13mm and the length is 30mm.

Compared with the prior art, the beneficial effects of the utility model are:

1. The Y-shaped self-expandable metal stent of bile-pancreatic duct expands the narrow and obstructed part of the ampulla through the expansion tube, and inserts the connected bile duct insertion part, pancreatic duct insertion part and duodenal insertion part into the patient correspondingly. In the bile duct, pancreatic duct and duodenum, the bile in the bile duct and the pancreatic juice in the pancreas can be drained at the same time, avoiding two operations and reducing the pain of the patient;

2. The Y-shaped self-expandable metal stent of the bile duct and pancreatic duct limits the angle between the insertion part of the bile duct and the insertion part of the pancreatic duct, so that when the insertion part of the bile duct and the insertion part of the pancreatic duct are placed at the obstruction site, they can be separated Fully fit the common bile duct and pancreatic duct to realize the drainage function;

3. The Y-type self-expandable metal stent for bile-pancreatic duct is placed in the duodenum of the patient, so that the expansion tube in the stent expands and fits the common bile duct and pancreatic duct of the patient, which is not easy shift.

Below in conjunction with accompanying drawing and embodiment further illustrate the utility model.

Description of drawings

Fig. 1 is an overall schematic diagram of an embodiment of a Y-shaped self-expandable metal stent for bile-pancreatic duct according to the present invention.

In the figure: 100, expansion tube; 101, bile duct insertion part; 102, pancreatic duct insertion part; 103, duodenum insertion part; 200, inner core; 201, bile duct segment part; 202, pancreatic duct segment part; 203. Section of the duodenum.

Detailed ways

The following description is used to disclose the utility model so that those skilled in the art can realize the utility model. The preferred embodiments described below are only examples, and those skilled in the art can devise other obvious variations. The basic principles of the present invention defined in the following description can be applied to other embodiments, variants, improvements, equivalents and other technical solutions without departing from the spirit and scope of the present invention.

Please refer to Fig. 1, the utility model provides a technical solution: a Y-shaped self-expandable metal stent for the bile duct and pancreatic duct, including: an expansion tube 100, the expansion tube 100 includes a connected bile duct insertion part 101, a pancreatic duct insertion 102 and duodenum insertion part 103, the bile duct insertion part 101, the pancreatic duct insertion part 102 and the duodenum insertion part 103 are arranged in a Y shape, wherein the bile duct insertion The angle between the part 101 and the pancreatic duct insertion part 102 is 90°.

Dilate the stenotic and obstructive part of the ampulla through the expansion tube 100, and place the connected bile duct insertion part 101, pancreatic duct insertion part 102 and duodenum insertion part 103 into the patient's bile duct, pancreatic duct and duodenum correspondingly , realize the simultaneous drainage of the bile in the patient’s bile duct and the pancreatic juice in the pancreas, avoid two operations, and reduce the pain of the patient. When the insertion part 101 and the pancreatic duct insertion part 102 are placed at the obstruction site, they can fully fit the common bile duct and the pancreatic duct respectively to realize the drainage function.

Further, the ratio of the length of the biliary duct insertion part 101 to the length of the pancreatic duct insertion part 102 is 2:1.

By defining the ratio of the length of the biliary duct insertion part 101 to the length of the pancreatic duct insertion part 102, when the bile duct insertion part 101 and the pancreatic duct insertion part 102 are placed at the obstruction site of the patient, the bile duct insertion part 101 And the pancreatic duct insertion part 102 can cooperate with the structural characteristics of the original common bile duct and pancreatic duct in the patient's body, and effectively fit and expand the obstructed part.

Further, the diameter of the duodenum insertion part 103 is larger than the diameter of the pancreatic duct insertion part 102 , and the diameter of the duodenum insertion part 103 is larger than the diameter of the bile duct insertion part 101 .

By defining the diameter of the duodenum insertion part 103 and the diameter of the pancreatic duct insertion part 102, and the diameter of the duodenum insertion part 103 and the diameter of the bile duct insertion part 101 , so that the duodenal insertion part 103 located in the duodenum of the patient can effectively stably support the overall position of the bracket, so as to avoid the deviation of the bracket after the surgical installation is completed, thereby affecting the guidance of the bracket. flow effect.

Furthermore, the sum of the diameter of the pancreatic duct insertion part 102 and the diameter of the bile duct insertion part 101 is not greater than the diameter of the duodenal insertion part 103 .

In one embodiment of the present invention, the sum of the diameter of the pancreatic duct insertion part 102 and the diameter of the bile duct insertion part 101 is equal to the diameter of the duodenal insertion part 103 .

By limiting the diameter of the pancreatic duct insertion part 102, the diameter of the bile duct insertion part 101 and the diameter of the duodenum insertion part 103, the duodenum insertion part 103, the The junction of the bile duct insertion part 101 and the pancreatic duct insertion part 102 has strong stability to ensure that the duodenal insertion part 103 can fully carry out the operation of the bile duct insertion part 101 and the pancreatic duct insertion part 102. Support, so that after the stent expands and fits the common bile duct and pancreatic duct, it is not easy to shift.

Further, the expansion pipe 100 is a braided mesh expansion pipe.

By restricting the molding process of the shape of the expansion tube 100 , the expansion tube 100 has high ductility, ensuring that the shape of the expansion tube 100 can be flexibly changed to meet surgical requirements.

It should be noted that, in the braided expansion pipe fitting, the braided part is only the pipe wall of the expansion pipe fitting 100 .

Further, the expansion tube 100 is an expansion tube made of nickel-titanium shape memory alloy wire.

By using the principle that nickel-titanium shape memory alloy is easy to compress and stretch, the expansion pipe 100 can be deformed arbitrarily at room temperature. When the ambient temperature reaches the temperature of the human body, the expansion pipe 100 can immediately and spontaneously return to the original design shape, thereby Adequately fit the common bile duct and pancreatic duct of the patient.

Further, the stent further includes an inner core 200 embedded in the expansion tube 100 , and the inner core 200 is detachably connected to the expansion tube 100 .

By setting the inner core 200, after endoscopic retrograde cholangiopancreatography, the surgeon can use the insertion instrument to cooperate with the inner core 200, insert the expansion tube 100 containing the inner core 200 into the lesion of the patient, and When the expansion tube 100 returns to the original design shape, the inner core 200 is pulled out to complete the operation.

Further, the inner core 200 includes three connected sections, the three sections are the bile duct section 201, the pancreatic duct section 202 and the duodenum section 203, wherein the bile duct section 201 corresponds to all The bile duct insertion part 101 is arranged, the pancreatic duct section 202 is arranged corresponding to the pancreatic duct insertion part 102 , and the duodenal section 203 is arranged corresponding to the duodenum insertion part 103 .

By dividing the inner core 200 into the connected bile duct section 201, pancreatic duct section 202 and duodenum section 203, and combining the bile duct section 201, pancreatic duct section 202 and duodenum section 203 with the connected The bile duct insertion part 101, the pancreatic duct insertion part 102 and the duodenum insertion part 103 correspond, so that when the surgeon inserts the expansion tube 100 through the inner core 200, the inner The core 200 can stably support each part of the expansion tube 100 .

Further, the expansion tube 100 includes a first specification expansion tube or a second specification expansion tube;

In the expansion tube of the first specification, the diameter of the bile duct insertion part 101 is 5 mm and the length is 60 mm, the diameter of the pancreatic duct insertion part 102 is 3 mm and the length is 30 mm, and the duodenum insertion part 103 has a diameter of 8mm and a length of 20mm;

In the expansion tube of the second specification, the biliary duct insertion part 101 has a diameter of 8 mm and a length of 80 mm, the pancreatic duct insertion part 102 has a diameter of 5 mm and a length of 40 mm, and the duodenum insertion part 103 has a diameter of 13 mm and a length of 30 mm.

By setting the expansion tube 100 into different specifications, the common bile duct and the pancreatic duct can be better matched, and the stent can be applied to patients with different conditions.

working principle:

After endoscopic retrograde cholangiopancreatography, the expansion tube 100 is adjusted to a suitable pre-insertion state at room temperature, and the expansion tube 100 containing the inner core 200 is inserted into the patient's body with the insertion device, wherein the bile duct insertion part 101 and The pancreatic duct insertion part 102 is respectively inserted into the common bile duct and pancreatic duct of the patient. When the expansion tube 100 reaches the body temperature, the expansion tube 100 spontaneously returns to the original design shape, wherein the bile duct insertion part 101 covers the inner surface of the common bile duct, wherein The pancreatic duct insertion part 102 covers the inner surface of the pancreatic duct, and the duodenal insertion part 103 is inserted into the duodenum to support and position the stent as a whole. The intestinal segment 203 is withdrawn, and the duodenal segment 203 pulls the bile duct segment 201 and the pancreatic duct segment 202 respectively from the bile duct insertion part 101 and the pancreatic duct insertion part 102, and the inner core 200 is pulled out to complete the operation ;

Among them, if the patient's ampulla is completely obstructed, the ampullary incision can be performed endoscopically and then the tube can be inserted.

The stent can not only expand the narrow and obstructed part of the ampulla, but also drain the bile in the bile duct and the pancreatic juice in the pancreas.

To sum up, the Y-shaped self-expandable metal stent for bile-pancreatic duct expands the narrow and obstructed part of the ampulla through the expansion tube 100, and inserts the connected bile duct insertion part 101, pancreatic duct insertion part 102 and duodenum The part 103 is correspondingly placed in the patient's bile duct, pancreatic duct and duodenum to achieve simultaneous drainage of bile in the patient's bile duct and pancreatic juice in the pancreas, avoiding two operations and reducing the pain of the patient. The angle between the pancreatic duct insertion part 102 and the pancreatic duct insertion part 102 is limited, so that when the bile duct insertion part 101 and the pancreatic duct insertion part 102 are placed at the obstruction site, they can fully fit the common bile duct and pancreatic duct respectively to realize the drainage function.

The above-described embodiments are only used to illustrate the technical ideas and characteristics of the present utility model, and its purpose is to enable those skilled in the art to understand the content of the present utility model and implement it accordingly. The present embodiment cannot be limited only by this embodiment. The patent scope of the utility model, that is, all equivalent changes or modifications made according to the spirit disclosed by the utility model still fall within the patent scope of the utility model.

Claims (9)

1. A Y-shaped self-expandable metal stent for bile-pancreatic duct, characterized in that it comprises: an expansion tube (100), and the expansion tube (100) includes a connected bile duct insertion part (101), a pancreatic duct insertion part ( 102) and the duodenum insertion part (103), the bile duct insertion part (101), the pancreatic duct insertion part (102) and the duodenum insertion part (103) are Y-shaped Arranged, wherein the included angle between the biliary duct insertion part (101) and the pancreatic duct insertion part (102) is 90°. 2. A Y-type self-expandable metal stent for bile duct and pancreatic duct according to claim 1, characterized in that: the length of the bile duct insertion part (101) and the length of the pancreatic duct insertion part (102) The ratio is 2:1. 3. A Y-type self-expandable metal stent for bile-pancreatic duct according to claim 1, characterized in that: the diameter of the duodenum insertion part (103) is larger than that of the pancreatic duct insertion part (102 ), the diameter of the duodenum insertion part (103) is larger than the diameter of the bile duct insertion part (101). 4. A Y-type self-expandable metal stent for bile duct and pancreatic duct according to claim 3, characterized in that: the diameter of the pancreatic duct insertion part (102) and the diameter of the bile duct insertion part (101) The sum is not greater than the diameter of the duodenum insertion part (103). 5 . The Y-shaped self-expandable metal stent for biliopancreatic duct according to claim 1 , characterized in that: the expansion tube ( 100 ) is a braided mesh expansion tube. 5 . 6 . The Y-shaped self-expandable metal stent for biliopancreatic duct according to claim 5 , wherein the expansion tube ( 100 ) is an expansion tube ( 100 ) made of nickel-titanium shape memory alloy wire. 7 . 7. A Y-shaped self-expandable metal stent for biliopancreatic duct according to claim 1, characterized in that it further comprises an inner core (200), and the inner core (200) is embedded in the expansion tube (100) ), and the inner core (200) is detachably connected to the expansion pipe (100). 8. A Y-shaped self-expandable metal stent for bile duct and pancreatic duct according to claim 7, characterized in that: the inner core (200) includes three connected segments, and the three segments are respectively bile duct segments section (201), pancreatic duct section (202) and duodenum section (203), wherein the bile duct section (201) is arranged corresponding to the bile duct insertion section (101), and the pancreatic duct section (202 ) is arranged corresponding to the pancreatic duct insertion part (102), and the duodenal section (203) is arranged corresponding to the duodenum insertion part (103). 9. A Y-type self-expandable metal stent for biliopancreatic duct according to claim 1, characterized in that: the expansion tube (100) comprises a first specification expansion tube or a second specification expansion tube; In the expansion tube of the first specification, the diameter of the bile duct insertion part (101) is 5 mm and the length is 60 mm, the diameter of the pancreatic duct insertion part (102) is 3 mm, and the length is 30 mm. The diameter of the intestinal insertion part (103) is 8 mm and the length is 20 mm; In the expansion tube of the second specification, the diameter of the bile duct insertion part (101) is 8 mm and the length is 80 mm, the diameter of the pancreatic duct insertion part (102) is 5 mm, and the length is 40 mm. The intestinal insertion part (103) has a diameter of 13 mm and a length of 30 mm.

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