CN212308119U - Biliary tract recyclable drainage tube covered stent - Google Patents
Biliary tract recyclable drainage tube covered stent Download PDFInfo
- Publication number
- CN212308119U CN212308119U CN202021762668.7U CN202021762668U CN212308119U CN 212308119 U CN212308119 U CN 212308119U CN 202021762668 U CN202021762668 U CN 202021762668U CN 212308119 U CN212308119 U CN 212308119U
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- drainage tube
- stent
- support
- tectorial membrane
- biliary tract
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- 210000003445 biliary tract Anatomy 0.000 title claims abstract description 27
- 210000002489 tectorial membrane Anatomy 0.000 claims abstract description 32
- 239000012528 membrane Substances 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- 229920001971 elastomer Polymers 0.000 claims description 3
- 239000004816 latex Substances 0.000 claims description 3
- 229920000126 latex Polymers 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910052715 tantalum Inorganic materials 0.000 claims description 3
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims 1
- 239000010936 titanium Substances 0.000 claims 1
- 229910052719 titanium Inorganic materials 0.000 claims 1
- 238000011084 recovery Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 210000000013 bile duct Anatomy 0.000 description 17
- 208000031481 Pathologic Constriction Diseases 0.000 description 10
- 210000001953 common bile duct Anatomy 0.000 description 9
- 230000036262 stenosis Effects 0.000 description 7
- 208000037804 stenosis Diseases 0.000 description 7
- 210000003459 common hepatic duct Anatomy 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 210000004185 liver Anatomy 0.000 description 4
- 206010051341 Bile duct stenosis Diseases 0.000 description 3
- 206010020718 hyperplasia Diseases 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000000638 stimulation Effects 0.000 description 3
- 238000002054 transplantation Methods 0.000 description 3
- 206010020751 Hypersensitivity Diseases 0.000 description 2
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- 206010052428 Wound Diseases 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 208000026935 allergic disease Diseases 0.000 description 2
- 230000007815 allergy Effects 0.000 description 2
- 208000003167 cholangitis Diseases 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 206010051268 Anastomotic stenosis Diseases 0.000 description 1
- 206010061695 Biliary tract infection Diseases 0.000 description 1
- 206010016654 Fibrosis Diseases 0.000 description 1
- 206010061218 Inflammation Diseases 0.000 description 1
- 208000032984 Intraoperative Complications Diseases 0.000 description 1
- 238000002192 cholecystectomy Methods 0.000 description 1
- 201000001883 cholelithiasis Diseases 0.000 description 1
- 208000037976 chronic inflammation Diseases 0.000 description 1
- 230000006020 chronic inflammation Effects 0.000 description 1
- 230000007882 cirrhosis Effects 0.000 description 1
- 208000019425 cirrhosis of liver Diseases 0.000 description 1
- 238000013170 computed tomography imaging Methods 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 210000001198 duodenum Anatomy 0.000 description 1
- 238000001839 endoscopy Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000007888 film coating Substances 0.000 description 1
- 238000009501 film coating Methods 0.000 description 1
- 208000001130 gallstones Diseases 0.000 description 1
- 210000001035 gastrointestinal tract Anatomy 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 230000004054 inflammatory process Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000007794 irritation Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002595 magnetic resonance imaging Methods 0.000 description 1
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- 238000000034 method Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 210000000496 pancreas Anatomy 0.000 description 1
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Images
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- Media Introduction/Drainage Providing Device (AREA)
- External Artificial Organs (AREA)
Abstract
The utility model provides a recoverable drainage tube tectorial membrane support of biliary tract, including tectorial membrane support, drainage tube and sleeve pipe, the drainage tube includes outer drainage tube, preceding drainage tube and back drainage tube, outer drainage tube one end sets up to preceding drainage tube, preceding drainage tube is kept away from outer drainage tube one end and is set up to back drainage tube, and preceding drainage tube sets up the tectorial membrane support with back drainage tube boundary department, the tectorial membrane support includes support and tectorial membrane, and inside the support inserted the drainage tube, the drainage tube lateral wall after the tip of the distal end toper part of support is pegged graft, and the support outside is located to the tectorial membrane cover, and the drainage tube outside is located to the tectorial membrane both ends cover, the tectorial membrane sets up netted through-hole with drainage tube connection position, the sleeve pipe is established to the outside cover of tectorial. The beneficial effects of the utility model are that can support the narrow position of biliary tract and the problem of interior shutoff biliary tract leak opening in the biliary tract drainage to but recovery type support device.
Description
Technical Field
The utility model belongs to the field of medical supplies, especially, relate to recoverable drainage tube tectorial membrane support of biliary tract.
Background
Biliary strictures can be cancerous or benign. Benign stenosis can be caused by surgical injury or trauma, inflammation of the pancreas, scarring or cirrhosis of the tissue of the bile duct resulting from chronic inflammation, recurrent gallstones, or poor tissue reconnection following liver transplantation. The incidence rate of biliary tract complications after liver transplantation is about 5-34%, wherein the biliary tract anastomotic stenosis accounts for about 40% of the biliary tract complications. The incidence of benign biliary stricture has increased with the increase in cholecystectomy cases, and surgery has played an important role in the treatment of benign biliary stricture, but is associated with serious complications and mortality. At present, the placement of a minimally invasive endoscope or a percutaneous biliary puncture stent becomes a treatment option with smaller wound and higher success rate. However, for benign stenosis, most stents may be blocked in a few years by simply implanting the stent or the covered stent, and the stent is also taken out after implanting the covered stent by an endoscope, but the stents must cross over papilla, which may cause reflux cholangitis, especially for patients after liver transplantation, biliary tract infection is fatal damage, so the stent of the invention can solve the problem of stenosis and biliary leakage, and can be replaced, which is beneficial to biliary tract recovery.
Bile duct stenosis or leaks can be diagnosed by endoscopy, CT imaging or MRI. In recent years, endoscopic or percutaneous biliary tract puncture has become the first choice for treating posterior biliary tract stenosis, and mainly comprises endoscopic or percutaneous biliary tract balloon dilatation, and placement of a biliary tract plastic stent or a metal stent. However, the two modes have the defects that the stenosis is easy to recur, the plastic stent is easy to block and shift, the metal stent stimulates the intimal hyperplasia and the like.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a stable in structure, circulation effectual biliary tract drainage tube especially is fit for bile duct drainage work.
The technical scheme of the utility model is that: a biliary tract recyclable drainage tube covered stent comprises a covered stent, a drainage tube and a sleeve, wherein the drainage tube comprises an outer drainage tube, a front drainage tube and a rear drainage tube, one end of the outer drainage tube is set as the front drainage tube, one end of the front drainage tube, which is far away from the outer drainage tube, is set as the rear drainage tube, the covered stent is arranged at the boundary of the front drainage tube and the rear drainage tube and comprises a stent and a covering film, the stent is inserted into the drainage tube, the opened diameter of the stent is larger than that of the drainage tube, the end part of the conical part at the far end of the stent is inserted into the side wall of the rear drainage tube, a guide wire at one end of the front drainage tube of the stent extends to the outside of the port of the drainage tube, the end part at the far end and the end part of the near end, the drainage device is characterized in that a reticular through hole is formed in the connecting part of the film covering and the drainage tube, a sleeve is sleeved outside the film covering support, the sleeve is in transition fit with the film covering support, the sleeve is sleeved outside the outer drainage tube and the front drainage tube, a plurality of drainage holes are formed in the surface of the rear drainage tube, and the drainage holes are through holes.
The length of the outer drainage tube is 10-20cm, the diameter of the outer drainage tube catheter is 8-10Fr, the length of the front drainage tube is 10-20cm, the diameter of the front drainage tube catheter is 8-10Fr, the length of the covered stent is 2-4cm, the diameter of the covered stent is 6-12mm, the length of the rear drainage tube is 4-6cm, and the diameter of the rear drainage tube catheter is 6Fr or 8-10 Fr.
The biliary tract recyclable drainage tube tectorial membrane stent is divided into an extracorporeal puncture type and an intracorporeal puncture type.
The specifications of the biliary tract recyclable drainage tube covered stent extracorporeal puncture are as follows: the length of the outer drainage tube is 10-20cm, the diameter of the outer drainage tube catheter is 8-10Fr, the length of the front drainage tube is 4-6cm, the diameter of the front drainage tube catheter is 8-10Fr, the length of the covered stent is 2-4cm, the diameter of the covered stent is 6-12mm, the rear drainage tube adopts a curled structure, the length of the rear drainage tube is 4-6cm, and the diameter of the rear drainage tube catheter is 6 Fr.
The specifications of the biliary tract recyclable drainage tube tectorial membrane stent internal puncture are as follows: the length of the front drainage tube is 10-15cm, the diameter of the front drainage tube catheter is 8-10Fr, the length of the covered stent is 2-4cm, the diameter of the covered stent is 6-12mm, the length of the rear drainage tube is 4-6cm, and the diameter of the rear drainage tube catheter is 8-10 Fr.
Furthermore, the support adopts a self-expansion support or a conical self-expansion support, and the end of the conical self-expansion support with the smaller diameter is arranged at the end close to the front drainage tube.
Further, the coating adopts rubber, latex or high molecular polymer.
Further, the end part of the rear drainage tube is arranged to be curled.
Further, the stent is made of stainless steel, nickel or tantalum, and a biological coating is arranged on the surface of the stent.
Further, the front drainage tube 5 is provided with a drainage hole 8.
The utility model has the advantages and positive effects that:
1. because the tectorial membrane support is arranged at the middle position of the drainage tube, the place where the bile duct leaks or the bile duct is narrow can be blocked and expanded by the tectorial membrane support when an operation is carried out, the disease is effectively relieved, and the liquid in the bile duct is prevented from leaking.
2. Through the effect of tectorial membrane and support, can effectually avoid bile duct stenosis and bile duct to have the influence of leaking to the operation when the operation, reduce the risk of operation, improve the operation effect, can convenient and fast expand narrow department when the operation to can also carry out the shutoff to the leak source of bile duct, promote the recovery of postoperative.
3. Because the cooperation of tectorial membrane and support, can remove support and tectorial membrane after recovering to accomplish, can not stay in the human body permanently, be a recoverable support mode, the tectorial membrane can avoid the support to open totally or excessively open, reduces the degree of difficulty when the support is retrieved, can be through convenient compression of pipe and retrieve the support.
5. Because the tectorial membrane support will produce the fixed action after the expansion in the courage pipe, avoid the drainage tube to take place to remove in the human body, strengthen the fixed action to the drainage tube, the drainage effect in the courage pipe can be deposited in the multistage drainage hole of drainage tube.
6. Because the tectorial membrane has set up the mesh with the drainage tube junction, can not block the bile duct to the tectorial membrane has adopted the better neutral material of toughness and elasticity, can not amazing the human body, and can avoid injuring the organ, when retrieving the support, can make things convenient for the compression of support, reduces the required power of compressed support.
7. The biological coating on the surface of the stent can prevent the stent from rusting or crystallizing on the surface, and the film can also avoid the condition that the stent stimulates a human body to cause allergy or hyperplasia.
Drawings
FIG. 1 is a schematic view of the intra-body puncture drainage of the present invention;
FIG. 2 is a schematic view of the extracorporeal puncture drainage of the present invention;
FIG. 3 is a schematic view of a stent graft of the present invention;
fig. 4 is a schematic view of the bracket of the present invention.
In the figure:
1. right hepatic duct 2, left hepatic duct 3, common bile duct
4. Operation incision 5, front drainage tube 6 and covered stent
7. Rear drainage tube 8, drainage hole 9 and outer drainage tube
10. Drainage tube 11, sleeve 12 and bracket
13. Film coating
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1-3:
a biliary tract recyclable drainage tube covered stent comprises a covered stent 6, a drainage tube 8 and a sleeve 11, wherein the drainage tube 10 comprises an outer drainage tube 9, a front drainage tube 5 and a rear drainage tube 7, one end of the outer drainage tube 9 is set as the front drainage tube 5, one end of the front drainage tube 5, which is far away from the outer drainage tube 9, is set as the rear drainage tube 7, the covered stent 6 is arranged at the boundary of the front drainage tube 5 and the rear drainage tube 7, the covered stent 6 comprises a stent 12 and a covered membrane 13, the stent 12 is inserted into the drainage tube 10, the expanded diameter of the stent 12 is larger than that of the drainage tube 10, the end part of the conical part at the far end of the stent 12 is inserted into the side wall of the rear drainage tube 7, a guide wire at one end of the front drainage tube 5 extends to the outside of the port of the drainage tube 10, the end part and the end part at, after 12 struts, with tectorial membrane 13 interference fit, tectorial membrane 13 and drainage tube 10 interference fit, tectorial membrane 13 sets up netted through-hole with drainage tube 10 junction, sleeve pipe 11 is established to tectorial membrane support 6 outside cover, sleeve pipe 11 and tectorial membrane support 6 transition fit, the outer drainage tube 9 of sleeve pipe 11 cover located and preceding drainage tube outside, back drainage tube 7 surface sets up a plurality of drainage holes 8, drainage hole 8 is the through-hole.
The length of the external drainage tube 9 is 10-20cm, the diameter of the catheter of the external drainage tube 9 is 8-10Fr, the length of the front drainage tube 5 is 10-20cm, the diameter of the catheter of the front drainage tube 5 is 8-10Fr, the length of the covered stent 6 is 2-4cm, the diameter of the covered stent 6 is 6-12mm, the length of the rear drainage tube 7 is 4-6cm, and the diameter of the catheter of the rear drainage tube 7 is 6Fr or 8-10 Fr.
The stent 12 adopts a self-expansion stent or a conical self-expansion stent, and the end of the conical self-expansion stent with the smaller diameter is arranged at the end close to the front drainage tube 5.
The film 13 is made of rubber, latex or high molecular polymer.
The end part of the rear drainage tube 7 is arranged to be curled.
The stent 12 is made of stainless steel, nickel or tantalum, and a biological coating is arranged on the surface of the stent 12.
The working process of the example is as follows:
example 1: as shown in fig. 1, which is a schematic view of in vivo puncture drainage, when an operation is performed, a drainage tube 10 is inserted into a common bile duct 3 through an operation incision 4, a rear drainage tube 7 enters a left hepatic duct 2 along the common bile duct 3, a covered stent 6 is placed at a leakage point of a bile duct or a narrow part of the bile duct, then a sleeve 11 is slowly drawn out, an internal stent 12 automatically opens along with the drawing out of the sleeve 11, the internal puncture can use a self-expanding stent or a conical self-expanding stent, the stent 12 expands a covered membrane 13, the expanded covered membrane 13 is tightly attached to the inner wall of the common bile duct 3, the covered membrane 13 directly blocks the leakage point of the bile duct, the stent 12 directly expands the narrow part of the bile duct, then drainage can be performed through a drainage hole 8, and meanwhile, a reticular hole is formed at the connection part of the covered membrane 13 and the drainage tube 10, so that the condition of.
When it is desired to remove the drain tube 10 and the stent graft 6, because the stent graft 6 is positioned adjacent to the surgical incision 4, the stent graft 6 can be removed from the common bile duct 3 by simply withdrawing the drain tube 10 along the surgical incision.
Example 2: as shown in fig. 2, which is a schematic diagram of extracorporeal puncture drainage, when performing an operation, a drainage tube 10 is inserted into a liver along an external incision, a posterior drainage tube 7 is inserted into a common bile duct 3 along a right hepatic duct 1, the posterior drainage tube 7 used for extracorporeal puncture is a curled tube, the length of the curled posterior drainage tube 7 is 4cm, and the length of the common bile duct 3 is 8-12cm, so that the problem of drainage failure caused by the posterior drainage tube 7 penetrating through the common bile duct 3 and entering duodenum is effectively avoided, irritation of the drainage tube 10 to an intestinal tract is also avoided, when a stent graft 6 enters a leakage point of a bile duct or a stenosis of the bile duct, the cannula 11 is slowly drawn out, and along with the drawing out of the cannula 11, the stent 12 struts a stent graft 13, the stent 13 is attached to the inner wall of the common bile duct 3 to block the leakage point of the bile duct, and the stent 12 struts the stenosis of the bile duct, the stent 13, can facilitate the work of the sleeve 11 removing the bracket 13, the front drainage tube 5 and the rear drainage tube 7 of the drainage tube 10 used for external puncture are both provided with drainage holes 8, thus enhancing the drainage effect.
When the drainage tube 10 and the covered stent 6 are removed, the sleeve 11 is sleeved outside the drainage tube 10 and then extends to the position of the covered stent 6 along the drainage tube 10, because the smaller end of the stent 12 of the covered stent 6 is close to the sleeve 11, the sleeve 11 is sleeved at the small-diameter end and moves forward along the external covered membrane, the guide wire of the stent 12 positioned outside the drainage tube 10 is pulled, pressure is gradually applied to the stent 13, the shrinkage force of the covered membrane and the conical part of the stent 12 are matched, the stent 12 is slowly compressed, the diameter of the stent 12 is compressed for enough hours, and the covered stent 6 can be taken away from a human body by pulling the drainage tube 10.
Compared with the traditional permanent support and a treatment mode of leakage and bile duct stenosis aiming at a bile duct, the problem can be solved more quickly by matching the drainage tube 10 with the covered stent 6, extra operation is not needed, the wound caused to a patient is reduced, the support 13 can be recovered, the stimulation and the influence on a human body are reduced, a biological coating is adopted on the surface of the support 13, the surface is prevented from crystallizing or rusting, the support 13 and the human body are isolated by the covering membrane 13, the risk of allergy or hyperplasia caused by the stimulation of the support 13 to the human body is avoided, the guide wire is a soft metal wire, the end part of the guide wire of the support is positioned outside the drainage tube 10, the drainage tube 10 and the support 12 can be taken out by matching the guide wire 11 by pulling, and secondary damage and stimulation to the human body can not occur.
While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention, and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.
Claims (6)
1. Recoverable drainage tube tectorial membrane support of biliary tract, including tectorial membrane support (6), drainage tube (10) and sleeve pipe (11), its characterized in that: the drainage tube (10) comprises an outer drainage tube (9), a front drainage tube (5) and a rear drainage tube (7), one end of the outer drainage tube (9) is arranged to be the front drainage tube (5), one end, far away from the outer drainage tube (9), of the front drainage tube (5) is arranged to be the rear drainage tube (7), a covered stent (6) is arranged at the boundary of the front drainage tube (5) and the rear drainage tube (7), the covered stent (6) comprises a stent (12) and a covered membrane (13), the stent (12) is inserted into the drainage tube (10), the opened diameter of the stent (12) is larger than that of the drainage tube (10), the end part of the conical part at the far end of the stent (12) is inserted into the side wall of the rear drainage tube (7), a guide wire at one end of the front drainage tube (5) of the stent (12) extends out of the port of the drainage tube (10), the end part at the far end, the drainage tube (10) is sleeved with two ends of a covering film (13), the support (12) is in interference fit with the covering film (13) after being opened, the covering film (13) is in interference fit with the drainage tube (10), a net-shaped through hole is formed in the connecting part of the covering film (13) and the drainage tube (10), a sleeve (11) is sleeved outside the covering film support (6), the sleeve (11) is in transition fit with the covering film support (6), the sleeve (11) is sleeved outside the outer drainage tube (9) and the front drainage tube, a plurality of drainage holes (8) are formed in the surface of the rear drainage tube (7), and the drainage holes (8) are through holes;
the length of the outer drainage tube (9) is 10-20cm, the diameter of the catheter of the outer drainage tube (9) is 8-10Fr, the length of the front drainage tube (5) is 10-20cm, the diameter of the catheter of the front drainage tube (5) is 8-10Fr, the length of the covered stent (6) is 2-4cm, the diameter of the covered stent (6) is 6-12mm, the length of the rear drainage tube (7) is 4-6cm, and the diameter of the catheter of the rear drainage tube (7) is 6Fr or 8-10 Fr.
2. The biliary tract recyclable drainage tube tectorial membrane stent of claim 1, which is characterized in that: the support (12) adopts a self-expansion support or a conical self-expansion support, and the end with the smaller diameter of the conical self-expansion support is arranged at the end close to the front drainage tube (5).
3. The biliary tract recyclable drainage tube tectorial membrane stent of claim 1, which is characterized in that: the coating film (13) is made of rubber, latex or high molecular polymer.
4. The biliary tract recyclable drainage tube tectorial membrane stent of claim 1, which is characterized in that: the end part of the rear drainage tube (7) is arranged to be curled.
5. The biliary tract recyclable drainage tube tectorial membrane stent of claim 1, which is characterized in that: the stent (12) is made of stainless steel, nickel, titanium or tantalum, and a biological coating is arranged on the surface of the stent (12).
6. The biliary tract recyclable drainage tube tectorial membrane stent of claim 1, which is characterized in that: the front drainage tube (5) is provided with a drainage hole (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021762668.7U CN212308119U (en) | 2020-08-21 | 2020-08-21 | Biliary tract recyclable drainage tube covered stent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021762668.7U CN212308119U (en) | 2020-08-21 | 2020-08-21 | Biliary tract recyclable drainage tube covered stent |
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| Publication Number | Publication Date |
|---|---|
| CN212308119U true CN212308119U (en) | 2021-01-08 |
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ID=74035369
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021762668.7U Active CN212308119U (en) | 2020-08-21 | 2020-08-21 | Biliary tract recyclable drainage tube covered stent |
Country Status (1)
| Country | Link |
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| CN (1) | CN212308119U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111803239A (en) * | 2020-08-21 | 2020-10-23 | 高海军 | Biliary tract recyclable drainage tube covered stent |
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2020
- 2020-08-21 CN CN202021762668.7U patent/CN212308119U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111803239A (en) * | 2020-08-21 | 2020-10-23 | 高海军 | Biliary tract recyclable drainage tube covered stent |
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