CA2078211C - Indwelling stent and method of use - Google Patents
Indwelling stent and method of use Download PDFInfo
- Publication number
- CA2078211C CA2078211C CA002078211A CA2078211A CA2078211C CA 2078211 C CA2078211 C CA 2078211C CA 002078211 A CA002078211 A CA 002078211A CA 2078211 A CA2078211 A CA 2078211A CA 2078211 C CA2078211 C CA 2078211C
- Authority
- CA
- Canada
- Prior art keywords
- stent
- catheter body
- tube wall
- anchor means
- proximal end
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/94—Stents retaining their form, i.e. not being deformable, after placement in the predetermined place
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/02—Holding devices, e.g. on the body
- A61M25/04—Holding devices, e.g. on the body in the body, e.g. expansible
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M27/00—Drainage appliance for wounds or the like, i.e. wound drains, implanted drains
- A61M27/002—Implant devices for drainage of body fluids from one part of the body to another
- A61M27/008—Implant devices for drainage of body fluids from one part of the body to another pre-shaped, for use in the urethral or ureteral tract
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2220/0008—Fixation appliances for connecting prostheses to the body
- A61F2220/0016—Fixation appliances for connecting prostheses to the body with sharp anchoring protrusions, e.g. barbs, pins, spikes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2250/0058—Additional features; Implant or prostheses properties not otherwise provided for
- A61F2250/0096—Markers and sensors for detecting a position or changes of a position of an implant, e.g. RF sensors, ultrasound markers
- A61F2250/0098—Markers and sensors for detecting a position or changes of a position of an implant, e.g. RF sensors, ultrasound markers radio-opaque, e.g. radio-opaque markers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/0021—Catheters; Hollow probes characterised by the form of the tubing
- A61M25/0041—Catheters; Hollow probes characterised by the form of the tubing pre-formed, e.g. specially adapted to fit with the anatomy of body channels
Abstract
A stent (21) is disclosed having a pigtail (33) at its distal end (35) and having a flap (23) acting as a barb at its proximal end (29). Stent (21) includes a catheter body (31) having at least one lumen (43) and having drainage holes (37, 39). The stent may be made of radiopaque polyethylene. The pigtail (33) prevents entire proximal migration of catheter body (31) while allowing spring action to accommodate variations in length, while flap (23) prevents entire distal migration while being radially retractable to facilitate insertion. An alternative embodiment is disclosed having multiple flaps (25, 27) acting as a barb. A method of use is also disclosed.
Description
- dV~ 91/15254 ~ ~ ~ ~ ~ PCT/US91/02048 INDWELLING STENT AND METHOD OF USE
BACKGROUND OF THE INVENTION
A stmt is a mechanical device used to dilate and/or maintain a desired lumen in a tubular structure or duct as in the bile duct, pancreatic duct, cystic duct, ureter or urethra. Stones, contracting scar tissue or compressing neoplasia, benign or malignant, may compromise a duct lumen and are the indications for stent placement. The stmt must be rigid to be forced through and dilate a narrowed area (stenosis) but sufficiently pliable to conform to the adjacent normal tissue without injuring it by erosion.
Furthermore, a method must be provided to maintain the stent in place without proximal and distal migration. A stmt may pass distally out of position within the duct or be lost w proximally toward or into the organ. In either case, the result is failure to maintain a patent lumen and return of the obstruction and its symptoms. A passed stmt must be replaced. A lost stent must be retrieved from within the organ, manipulated through the narrowing (stenOSis), removed and then replaced. Beyond the technical complegity of retrieving a lost stent, the obstruction and its consequences must first be treated. These considerations emphasize the need to prevent stent loss in preference to the more easily replaced scent that has passed. ' Initially, stents with pigtails on both ends (double pigtails) were used in the biliary tree including the bile w ' and cystic ducts and the pancreas as well as the urinary tract. As technical skill and endoscopes improved, it became possible to use larger diameter stems greater than the ~~~~w~~
BACKGROUND OF THE INVENTION
A stmt is a mechanical device used to dilate and/or maintain a desired lumen in a tubular structure or duct as in the bile duct, pancreatic duct, cystic duct, ureter or urethra. Stones, contracting scar tissue or compressing neoplasia, benign or malignant, may compromise a duct lumen and are the indications for stent placement. The stmt must be rigid to be forced through and dilate a narrowed area (stenosis) but sufficiently pliable to conform to the adjacent normal tissue without injuring it by erosion.
Furthermore, a method must be provided to maintain the stent in place without proximal and distal migration. A stmt may pass distally out of position within the duct or be lost w proximally toward or into the organ. In either case, the result is failure to maintain a patent lumen and return of the obstruction and its symptoms. A passed stmt must be replaced. A lost stent must be retrieved from within the organ, manipulated through the narrowing (stenOSis), removed and then replaced. Beyond the technical complegity of retrieving a lost stent, the obstruction and its consequences must first be treated. These considerations emphasize the need to prevent stent loss in preference to the more easily replaced scent that has passed. ' Initially, stents with pigtails on both ends (double pigtails) were used in the biliary tree including the bile w ' and cystic ducts and the pancreas as well as the urinary tract. As technical skill and endoscopes improved, it became possible to use larger diameter stems greater than the ~~~~w~~
initial 5 French (1.7 mm O.D., 1 mm I.D.). With increased stmt diameter and rigidity, the pigtail exerted greater force on the wire guide used for introduction, and it became more difficult to force the stmt over the wire guide through a tight stenosis without buckling. Consequently, the pigtail Was replaced with a flap, particularly in stems of 10 French diameter and greater. This strategy improved introduction at the expense of the more efficient retention of a pigtail. A
small flap on both ends of the stent and long stems of 12 to 15 cm used in the biliary tree prevented this displacement by both resistance of the flap to movement and length of the stmt.
However, the double flap or wing stmt also has disadvantages. It is difficult to select the proper length as after stent placement, and after relief of obstruction there is substantial shrinkage of the duct system that may make a straight flap stent too long and erode or gouge tissue causing pain or bleeding with premature stent obstruction.
Flap stents may easily be lost into the obstructing duct during the last few forceful pushes during introduction. The relatively small wings may fracture and break off during introduction or break off due to loss of elasticity. Large 10 or 11.5 French scents are rigid and difficult to grasp for removal. This is particularly true if the stent is lost into the proximal duct system or organ cavity. The larger flaps of a 10 French or larger stent gouge or scrape the tissue on removal. This may provoke bleeding that leads to immediate occlusion of the replacement stmt. These problems with flap stents are exaggerated in the pancreas where 5 and 7 French (1.7 and 2.1 mm,O.D.) stems 3 to 5 cm in length are required and there is a relatively long duct (10 to 12 cm) into which the scent may be lost.
6V0 91/15254 ~ ~ ~ ~ ~ ~ ~ PCT/US91/02048 SUM~ZARY OF THE INVENTION
According to one embodiment, the present invention provides an indwelling stent, comprising: a catheter body having a tube wall surrounding a lumen and having drainage to allow fluids to pass in and out of said lumen. The catheter body has a distal end, a proximal end, and a central portion therebetween for maintaining a tubular structure in a patient open, and has a pigtail anchor means formed by a curl in the catheter body at the distal end for preventing entire proximal migration of the catheter body while allowing spring action in the curl to accommodate variations in length of the tubular structure in the patient. The proximal end has barb anchor means radially projecting from the proximal end for preventing entire distal migration of the catheter body, wherein the proximal end of the catheter body is substantially straight and wherein the barb anchor means are radially retractable toward the proximal end t.o' facilitate insertion of the proximal end through the tubular structure in the patient.
A method of use of this stmt is also provided.
One object of the present invention is to provide an improved scent and method of its use. These and other objects are set forth in the written description and drawings. -~~~~5~54 PCT/US91/02048 . , BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a side elevational view of a first embodiment ' of a stmt according to the present invention, having one ' flap.
S FIG. 2 is a cross-sectional view of the stmt of FIG. 1 taken along line 2-2 of FIG. 1.
FIG. 3 is a partial side elevational view of a proximal end of an alternative embodiment of the present invention, having two flaps.
FIGS. 4A, 4B and 4C sequentially illustrate a method of using the stmt of FIG. 1.
WO 91/15254 ~ ~ 8 '~ ~ ~ PCT/US91/02048 DESCRIPTION OF THE PREFERRED EMBODIMENT
For the purposes of promoting an understanding of the principles of the invention, reference will now be made to the embodiment illustrated in the drawings and specific language will be used to describe the same. It will nevertheless be understood that no limitation of the scope of the invention is.thereby intended, such alterations and further modifications in the illustrated device and method, and such further applications of the principles of the invention as illustrated therein being contemplated as would normally occur to one skilled in the art to which the invention relates.
The~previously described problems are resolved by this invention, stmt 21, that combines a proximal modified flap 23 at proximal end 29 of catheter body 31, or flaps 25 and 27 (see FIG. 3) along with a modified distal pigtail 33 at distal end 35. The single large flap 23 may be replaced with multiple smaller flaps 25 and 27 as shown in the alternative embodiment of FIG. 3. Two or more such flaps may be used. A
distal flap is replaced with pigtail 33 that contains multiple side holes, such as hole 37 for drainage, to reduce reflux and provide a spring-like retention device. The small flaps 25 and 27 are soft and not traumatic to adjacent tissues and can be removed without gouging or scraping.
Catheter body 31 has tube wall 41 surrounding at least one lumen, such as lumen 43 (see FIG. 2). Inbetween distal end 35 and proximal end 29 of catheter body 31 central portion 45 of the catheter body is located having a length 47. Typically, length 47 is between 2 cm and 12 cm.
Preferably, catheter body 31 is made of polyethylene which is radiopaque. .
Referring to FIG. 2, preferably the present invention has catheter body 31's dimensions such that it has an outside diameter of at least 1.7 mm and tube wall 41 has a thickness PCf/US91 /02048 of at least 0.35 mm. Other sizes may be provided and it is contemplated that French sizes 5 and 7 (among others) may be used. Flap 23 ha.s a flap length 49 which in the preferred embodiment is 7 mm. Distal end 35 includes distal tip 36.
Note that in the preferred embodiment, pigtail 33 has a curl 34 which is 360° with distal tip 36 parallel with central portion 45 of the catheter body. It is to be understood that for purposes of this application, a pigtail anchor can include pigtails having curvatures lessor or greater than 360°, and may have multiple curls. Proximal end 29 preferably is made with a flap 23 as illustrated which preferably is formed by a generally longitudinal cut in tube wall 41. Typically due to the cylindrical shape, this longitudinal cut generally takes a "U" or "V°' shape and provides a drainage opening in addition to holes which may be provided such as hole 39. Flap 23, as well as flaps 25 and 27, act as a barb mechanism allowing easy insertion through tubular structure 51 in a patient. (See FIGS..4A-4C). A
variety of structures may provide this barb action with the barb radially projecting from proximal end 29 for preventing entire distal migration of catheter body 31 while having the barb radially retractable towards proximal end 29 so catheter body 31 is substantially straight to facilitate insertion of the proximal end in tubular structure 51.
A method of using the present invention is illustrated in FIGS. 4A, 4B and 4C. Preferably, wire guide 59 is inserted in lumen 43 of stent 21, straightening out curl 34 (see FIG.
4A). Wire guide 59 is inserted through tubular structure 51 in the patient past stenosis 53.
Referring to FIGS. 4A and 4B, stent 21 is advanced along wire guide 59, preferably by a pushing action from positioner 61 (partially'shown) located around wire guide 59. When the barb anchor, such as flap 23, is in a position (see FIG. 4B
and FIG. 4C) proximally beyond tubular structure 51, typically in proximal organ 55, then wire guide 59 is W~ 91/1S2S4 ~ y~'~ ~ ~ ~ '~ PCT/U~91/02048 _7_ withdrawn from lumen 43 of the stem wherein curl 34 is reformed (see FIG. 4C). Pigtail 33's curl 34 acts to prevent proximal migration away from distal organ 57. It is to be understood that typically this method is to be performed endoscopically.
To facilitate scent removal and exchange the distal 5 to mm of the large 10 French or greater stems is drawn to a 5 French diameter or to a string-like extension that permits .
removal with a small diameter (5 to 7 French) more 10 maneuverable grasping forceps and prevents stent loss . proximally. This invention combines the ease of introduction provided by a straight proximal stent end that tapers to closely fit the introduction wire guide 59 without distortion and the spring--like distal pigtail 33 to prevent stmt 21 loss during or after introduction and allow removal with a smaller more maneuverable grasping forceps. The multiple side holes of the distal pigtail 33 prevent free reflux of intestinal or urinary contents into the proximal duct system while maintaining decompression and drainage. The multiple smaller flaps reduce gouging and bleeding on stent removal and exchange. The spring-like effect of the distal pigtail 33 obviates the need for long stems to maintain duct position. This allows the use of short more efficient stents for distal duct stenosis and removes the risk of tissue injury from the distal stent end 35 as well as the mechanical problem of forceful introduction of long large bore (greater ', than 10 French) stiff stems that must be bent to pass in a '...
tight U-turn from endoscope into the duct. Taken together, these changes significantly improve the ease of introduction and removal as well as the efficiency of residence of these . devices. The effect of these inventions will reduce the ' frequency of stent change and increase efficiency by reducing the number of procedures that patients are required to undergo during treatment with stents.
While the invention has been illustrated and described in 2~'~$~~.~
_8_ detail in the drawings and foregoing description, the same is to be considered as illustrative and not restrictive in character, it being understood that only the preferred embodiment has been shown and described and that all changes and modifications that come within the spirit of the invention are desired to be protected.
small flap on both ends of the stent and long stems of 12 to 15 cm used in the biliary tree prevented this displacement by both resistance of the flap to movement and length of the stmt.
However, the double flap or wing stmt also has disadvantages. It is difficult to select the proper length as after stent placement, and after relief of obstruction there is substantial shrinkage of the duct system that may make a straight flap stent too long and erode or gouge tissue causing pain or bleeding with premature stent obstruction.
Flap stents may easily be lost into the obstructing duct during the last few forceful pushes during introduction. The relatively small wings may fracture and break off during introduction or break off due to loss of elasticity. Large 10 or 11.5 French scents are rigid and difficult to grasp for removal. This is particularly true if the stent is lost into the proximal duct system or organ cavity. The larger flaps of a 10 French or larger stent gouge or scrape the tissue on removal. This may provoke bleeding that leads to immediate occlusion of the replacement stmt. These problems with flap stents are exaggerated in the pancreas where 5 and 7 French (1.7 and 2.1 mm,O.D.) stems 3 to 5 cm in length are required and there is a relatively long duct (10 to 12 cm) into which the scent may be lost.
6V0 91/15254 ~ ~ ~ ~ ~ ~ ~ PCT/US91/02048 SUM~ZARY OF THE INVENTION
According to one embodiment, the present invention provides an indwelling stent, comprising: a catheter body having a tube wall surrounding a lumen and having drainage to allow fluids to pass in and out of said lumen. The catheter body has a distal end, a proximal end, and a central portion therebetween for maintaining a tubular structure in a patient open, and has a pigtail anchor means formed by a curl in the catheter body at the distal end for preventing entire proximal migration of the catheter body while allowing spring action in the curl to accommodate variations in length of the tubular structure in the patient. The proximal end has barb anchor means radially projecting from the proximal end for preventing entire distal migration of the catheter body, wherein the proximal end of the catheter body is substantially straight and wherein the barb anchor means are radially retractable toward the proximal end t.o' facilitate insertion of the proximal end through the tubular structure in the patient.
A method of use of this stmt is also provided.
One object of the present invention is to provide an improved scent and method of its use. These and other objects are set forth in the written description and drawings. -~~~~5~54 PCT/US91/02048 . , BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a side elevational view of a first embodiment ' of a stmt according to the present invention, having one ' flap.
S FIG. 2 is a cross-sectional view of the stmt of FIG. 1 taken along line 2-2 of FIG. 1.
FIG. 3 is a partial side elevational view of a proximal end of an alternative embodiment of the present invention, having two flaps.
FIGS. 4A, 4B and 4C sequentially illustrate a method of using the stmt of FIG. 1.
WO 91/15254 ~ ~ 8 '~ ~ ~ PCT/US91/02048 DESCRIPTION OF THE PREFERRED EMBODIMENT
For the purposes of promoting an understanding of the principles of the invention, reference will now be made to the embodiment illustrated in the drawings and specific language will be used to describe the same. It will nevertheless be understood that no limitation of the scope of the invention is.thereby intended, such alterations and further modifications in the illustrated device and method, and such further applications of the principles of the invention as illustrated therein being contemplated as would normally occur to one skilled in the art to which the invention relates.
The~previously described problems are resolved by this invention, stmt 21, that combines a proximal modified flap 23 at proximal end 29 of catheter body 31, or flaps 25 and 27 (see FIG. 3) along with a modified distal pigtail 33 at distal end 35. The single large flap 23 may be replaced with multiple smaller flaps 25 and 27 as shown in the alternative embodiment of FIG. 3. Two or more such flaps may be used. A
distal flap is replaced with pigtail 33 that contains multiple side holes, such as hole 37 for drainage, to reduce reflux and provide a spring-like retention device. The small flaps 25 and 27 are soft and not traumatic to adjacent tissues and can be removed without gouging or scraping.
Catheter body 31 has tube wall 41 surrounding at least one lumen, such as lumen 43 (see FIG. 2). Inbetween distal end 35 and proximal end 29 of catheter body 31 central portion 45 of the catheter body is located having a length 47. Typically, length 47 is between 2 cm and 12 cm.
Preferably, catheter body 31 is made of polyethylene which is radiopaque. .
Referring to FIG. 2, preferably the present invention has catheter body 31's dimensions such that it has an outside diameter of at least 1.7 mm and tube wall 41 has a thickness PCf/US91 /02048 of at least 0.35 mm. Other sizes may be provided and it is contemplated that French sizes 5 and 7 (among others) may be used. Flap 23 ha.s a flap length 49 which in the preferred embodiment is 7 mm. Distal end 35 includes distal tip 36.
Note that in the preferred embodiment, pigtail 33 has a curl 34 which is 360° with distal tip 36 parallel with central portion 45 of the catheter body. It is to be understood that for purposes of this application, a pigtail anchor can include pigtails having curvatures lessor or greater than 360°, and may have multiple curls. Proximal end 29 preferably is made with a flap 23 as illustrated which preferably is formed by a generally longitudinal cut in tube wall 41. Typically due to the cylindrical shape, this longitudinal cut generally takes a "U" or "V°' shape and provides a drainage opening in addition to holes which may be provided such as hole 39. Flap 23, as well as flaps 25 and 27, act as a barb mechanism allowing easy insertion through tubular structure 51 in a patient. (See FIGS..4A-4C). A
variety of structures may provide this barb action with the barb radially projecting from proximal end 29 for preventing entire distal migration of catheter body 31 while having the barb radially retractable towards proximal end 29 so catheter body 31 is substantially straight to facilitate insertion of the proximal end in tubular structure 51.
A method of using the present invention is illustrated in FIGS. 4A, 4B and 4C. Preferably, wire guide 59 is inserted in lumen 43 of stent 21, straightening out curl 34 (see FIG.
4A). Wire guide 59 is inserted through tubular structure 51 in the patient past stenosis 53.
Referring to FIGS. 4A and 4B, stent 21 is advanced along wire guide 59, preferably by a pushing action from positioner 61 (partially'shown) located around wire guide 59. When the barb anchor, such as flap 23, is in a position (see FIG. 4B
and FIG. 4C) proximally beyond tubular structure 51, typically in proximal organ 55, then wire guide 59 is W~ 91/1S2S4 ~ y~'~ ~ ~ ~ '~ PCT/U~91/02048 _7_ withdrawn from lumen 43 of the stem wherein curl 34 is reformed (see FIG. 4C). Pigtail 33's curl 34 acts to prevent proximal migration away from distal organ 57. It is to be understood that typically this method is to be performed endoscopically.
To facilitate scent removal and exchange the distal 5 to mm of the large 10 French or greater stems is drawn to a 5 French diameter or to a string-like extension that permits .
removal with a small diameter (5 to 7 French) more 10 maneuverable grasping forceps and prevents stent loss . proximally. This invention combines the ease of introduction provided by a straight proximal stent end that tapers to closely fit the introduction wire guide 59 without distortion and the spring--like distal pigtail 33 to prevent stmt 21 loss during or after introduction and allow removal with a smaller more maneuverable grasping forceps. The multiple side holes of the distal pigtail 33 prevent free reflux of intestinal or urinary contents into the proximal duct system while maintaining decompression and drainage. The multiple smaller flaps reduce gouging and bleeding on stent removal and exchange. The spring-like effect of the distal pigtail 33 obviates the need for long stems to maintain duct position. This allows the use of short more efficient stents for distal duct stenosis and removes the risk of tissue injury from the distal stent end 35 as well as the mechanical problem of forceful introduction of long large bore (greater ', than 10 French) stiff stems that must be bent to pass in a '...
tight U-turn from endoscope into the duct. Taken together, these changes significantly improve the ease of introduction and removal as well as the efficiency of residence of these . devices. The effect of these inventions will reduce the ' frequency of stent change and increase efficiency by reducing the number of procedures that patients are required to undergo during treatment with stents.
While the invention has been illustrated and described in 2~'~$~~.~
_8_ detail in the drawings and foregoing description, the same is to be considered as illustrative and not restrictive in character, it being understood that only the preferred embodiment has been shown and described and that all changes and modifications that come within the spirit of the invention are desired to be protected.
Claims (14)
1. An indwelling stent, comprising:
a catheter body having a tube wall surrounding at least one lumen, said catheter body having drainage means for allowing fluids to pass in and out of said lumen, said catheter body further having a distal end for placement in a body cavity away from another body cavity to be drained, a proximal end for placement in the body cavity to be drained, and a central portion therebetween for maintaining a tubular structure in a patient open;
pigtail anchor means formed by a curl in said catheter body at said distal end for preventing entire proximal migration of said catheter body while allowing spring action in said curl to accommodate variations in length of the tubular structure in the patient; and barb anchor means radially projecting from said proximal end for preventing entire distal migration of said catheter body out of the body cavity to be drained, wherein said proximal end of said catheter body is substantially straight and wherein said barb anchor means are radially retractable toward said proximal end to facilitate insertion of said proximal end through the tubular structure in the patient without passing said pigtail anchor means through the tubular structure in the patient.
a catheter body having a tube wall surrounding at least one lumen, said catheter body having drainage means for allowing fluids to pass in and out of said lumen, said catheter body further having a distal end for placement in a body cavity away from another body cavity to be drained, a proximal end for placement in the body cavity to be drained, and a central portion therebetween for maintaining a tubular structure in a patient open;
pigtail anchor means formed by a curl in said catheter body at said distal end for preventing entire proximal migration of said catheter body while allowing spring action in said curl to accommodate variations in length of the tubular structure in the patient; and barb anchor means radially projecting from said proximal end for preventing entire distal migration of said catheter body out of the body cavity to be drained, wherein said proximal end of said catheter body is substantially straight and wherein said barb anchor means are radially retractable toward said proximal end to facilitate insertion of said proximal end through the tubular structure in the patient without passing said pigtail anchor means through the tubular structure in the patient.
2. The stent of claim 1 wherein said tube wall is relatively stiff and resists bending by having an outside diameter of at least 1.7 millimeters and further having a tube wall thickness of at least 0.35 millimeters.
3. The stent of claim 2 wherein said tube wall is formed of polyethylene.
4. The stent of claim 3 wherein said barb anchor means comprise at least one flap formed by a generally longitudinal cut in said tube wall.
5. The stent of claim 4 wherein said drainage means comprise a plurality of holes in said tube wall.
6. The stent of claim 5 wherein said central portion of said catheter body has a length between about two centimeters and twelve centimeters.
7. The stent of claim 6 wherein said curl is 360° with a distal tip of said pigtail anchor means parallel with said central portion of said catheter body.
8. The stent of claim 7 wherein said barb anchor means comprise a plurality of flaps formed by generally longitudinal cuts in said tube wall.
9. The stent of claim 1 wherein said tube wall is formed of polyethylene.
10. The stent of claim 1 wherein said barb anchor means comprise at least one flap formed by a generally longitudinal cut in said tube wall.
11. The stent of claim 1 wherein said drainage means comprise a plurality of holes in said tube wall.
12. The stent of claim 1 wherein said central portion of said catheter body has a length between about two centimeters and twelve centimeters.
13. The stent of claim 1 wherein said curl is 360° with a distal tip of said pigtail anchor means parallel with said central portion of said catheter body.
14. The stent of claim 1 wherein said barb anchor means comprise a plurality of flaps formed by generally longitudinal cuts in said tube wall.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US504,575 | 1990-04-04 | ||
US07/504,575 US5052998A (en) | 1990-04-04 | 1990-04-04 | Indwelling stent and method of use |
PCT/US1991/002048 WO1991015254A1 (en) | 1990-04-04 | 1991-03-27 | Indwelling stent and method of use |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2078211A1 CA2078211A1 (en) | 1991-10-05 |
CA2078211C true CA2078211C (en) | 2001-10-02 |
Family
ID=24006863
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002078211A Expired - Fee Related CA2078211C (en) | 1990-04-04 | 1991-03-27 | Indwelling stent and method of use |
Country Status (8)
Country | Link |
---|---|
US (1) | US5052998A (en) |
EP (1) | EP0523176B1 (en) |
JP (1) | JP3050597B2 (en) |
AT (1) | ATE184493T1 (en) |
AU (1) | AU647119B2 (en) |
CA (1) | CA2078211C (en) |
DE (1) | DE69131614T2 (en) |
WO (1) | WO1991015254A1 (en) |
Families Citing this family (152)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5782903A (en) * | 1987-10-19 | 1998-07-21 | Medtronic, Inc. | Intravascular stent and method |
US5176664A (en) * | 1990-10-09 | 1993-01-05 | Kenneth Weisman | Female voiding assist device and method |
US5176625A (en) * | 1990-10-25 | 1993-01-05 | Brisson A Glen | Stent for ureter |
US5295954A (en) * | 1990-11-20 | 1994-03-22 | Sachse Hans Ernst | Arrangement consisting of ureter tube, (stent) mandrin and auxiliary tube |
US5282784A (en) * | 1991-10-09 | 1994-02-01 | Mentor Corporation | Injection stent system |
US5176626A (en) * | 1992-01-15 | 1993-01-05 | Wilson-Cook Medical, Inc. | Indwelling stent |
US5306294A (en) * | 1992-08-05 | 1994-04-26 | Ultrasonic Sensing And Monitoring Systems, Inc. | Stent construction of rolled configuration |
US5366473A (en) * | 1992-08-18 | 1994-11-22 | Ultrasonic Sensing And Monitoring Systems, Inc. | Method and apparatus for applying vascular grafts |
US5716410A (en) * | 1993-04-30 | 1998-02-10 | Scimed Life Systems, Inc. | Temporary stent and method of use |
US5320602A (en) * | 1993-05-14 | 1994-06-14 | Wilson-Cook Medical, Inc. | Peel-away endoscopic retrograde cholangio pancreatography catheter and a method for using the same |
CN100998869A (en) * | 1993-07-19 | 2007-07-18 | 血管技术药物公司 | Anti-angiogene compositions and methods of use |
US6309411B1 (en) | 1994-10-19 | 2001-10-30 | Medtronic Ave, Inc. | Method and apparatus to prevent stent migration |
US6991614B2 (en) | 1995-11-07 | 2006-01-31 | Boston Scientific Scimed, Inc. | Ureteral stent for improved patient comfort |
US5824042A (en) * | 1996-04-05 | 1998-10-20 | Medtronic, Inc. | Endoluminal prostheses having position indicating markers |
FR2747574B1 (en) * | 1996-04-17 | 1998-10-16 | Synthelabo | DEVICE FOR HOLDING AN ELONGATED BODY IN A PARTICULARLY BODY CONDUIT |
US5795319A (en) * | 1997-03-07 | 1998-08-18 | Circon Corporation | Easily removable ureteral stent |
BR9804941A (en) * | 1997-05-08 | 1999-08-24 | Bard Inc C R | Tmr stentor and distribution system |
US6248100B1 (en) | 1997-08-14 | 2001-06-19 | Scimed Life Systems, Inc. | Drainage catheter delivery system |
US5921952A (en) | 1997-08-14 | 1999-07-13 | Boston Scientific Corporation | Drainage catheter delivery system |
US5957901A (en) | 1997-10-14 | 1999-09-28 | Merit Medical Systems, Inc. | Catheter with improved spray pattern for pharmaco-mechanical thrombolysis therapy |
FR2771297B1 (en) * | 1997-11-25 | 2000-02-11 | Pierre Andre Jacques Bige | TWO-CHANNEL PROBE FOR TREATING EYEWEEDING |
US6767339B2 (en) * | 1997-12-12 | 2004-07-27 | Wilson-Cook Medical, Inc. | Body canal intrusion instrumentation having bidirectional coefficient of surface friction with body tissue |
US6217556B1 (en) | 1998-03-19 | 2001-04-17 | Allegiance Corporation | Drainage catheter |
US6402351B1 (en) | 1998-03-27 | 2002-06-11 | Hill-Rom Services, Inc., | Controls for a surgical light apparatus |
US6176597B1 (en) | 1998-03-27 | 2001-01-23 | Hill-Rom, Inc. | Reflector for surgical light apparatus |
EP1068472B1 (en) | 1998-03-27 | 2006-05-24 | Hill-Rom Services, Inc. | Support arm for surgical light apparatus |
US6132062A (en) | 1998-03-27 | 2000-10-17 | Hill-Rom, Inc. | Task light for a surgical light apparatus |
US7118600B2 (en) * | 1998-08-31 | 2006-10-10 | Wilson-Cook Medical, Inc. | Prosthesis having a sleeve valve |
US6196230B1 (en) | 1998-09-10 | 2001-03-06 | Percardia, Inc. | Stent delivery system and method of use |
EP1121166A2 (en) * | 1998-09-10 | 2001-08-08 | Percardia, Inc. | Body fluid shunt device and method of use |
US6709465B2 (en) | 1999-03-18 | 2004-03-23 | Fossa Medical, Inc. | Radially expanding ureteral device |
US6702811B2 (en) | 1999-04-05 | 2004-03-09 | Medtronic, Inc. | Ablation catheter assembly with radially decreasing helix and method of use |
WO2000071062A1 (en) * | 1999-05-21 | 2000-11-30 | Bige Pierre Andre Jacques | Bi-canalicular probe for the treatment of lacrimation of the eye |
JP4108882B2 (en) | 1999-08-04 | 2008-06-25 | オリンパス株式会社 | Endoscope wall fixture |
US7695492B1 (en) * | 1999-09-23 | 2010-04-13 | Boston Scientific Scimed, Inc. | Enhanced bleed back system |
US6547761B2 (en) | 2000-01-07 | 2003-04-15 | Scimed Life Systems, Inc. | Drainage catheter |
EP1274479B1 (en) * | 2000-04-11 | 2010-07-14 | Boston Scientific Limited | Reinforced retention structures |
US6508789B1 (en) | 2000-06-05 | 2003-01-21 | Merit Medical Systems, Inc. | Systems and methods for coupling a drainage catheter to a patient and decoupling the drainage catheter from the patient |
US20030060872A1 (en) * | 2001-09-26 | 2003-03-27 | Gary Gomringer | Stent with radiopaque characteristics |
US6921378B2 (en) * | 2001-10-09 | 2005-07-26 | Boston Scientific Scimed, Inc. | Anti-reflux drainage devices and methods |
US7041139B2 (en) | 2001-12-11 | 2006-05-09 | Boston Scientific Scimed, Inc. | Ureteral stents and related methods |
US20100016943A1 (en) | 2001-12-20 | 2010-01-21 | Trivascular2, Inc. | Method of delivering advanced endovascular graft |
US7147661B2 (en) | 2001-12-20 | 2006-12-12 | Boston Scientific Santa Rosa Corp. | Radially expandable stent |
NZ535101A (en) | 2002-03-08 | 2007-07-27 | Eisai Co Ltd | Macrocyclic compounds useful as pharmaceuticals |
US8328877B2 (en) | 2002-03-19 | 2012-12-11 | Boston Scientific Scimed, Inc. | Stent retention element and related methods |
NZ535139A (en) | 2002-03-22 | 2007-07-27 | Eisai Co Ltd | Hemiasterlin derivatives and uses thereof in the treatment of cancer |
US8774913B2 (en) | 2002-04-08 | 2014-07-08 | Medtronic Ardian Luxembourg S.A.R.L. | Methods and apparatus for intravasculary-induced neuromodulation |
US20140018880A1 (en) | 2002-04-08 | 2014-01-16 | Medtronic Ardian Luxembourg S.A.R.L. | Methods for monopolar renal neuromodulation |
US7653438B2 (en) | 2002-04-08 | 2010-01-26 | Ardian, Inc. | Methods and apparatus for renal neuromodulation |
AU2003221875A1 (en) * | 2002-04-11 | 2003-10-27 | Eva Corporation | Stabilizing surgical delivery apparatus and method of use |
US6949125B2 (en) * | 2002-04-16 | 2005-09-27 | Boston Scientific Scimed, Inc. | Ureteral stent with end-effector and related methods |
US6908447B2 (en) * | 2002-04-18 | 2005-06-21 | Scimed Life Systems, Inc. | Anti-reflux ureteral stents and methods |
US7931658B2 (en) | 2002-09-20 | 2011-04-26 | Interrad Medical, Inc. | Temporary retention device |
US6929621B2 (en) * | 2002-10-02 | 2005-08-16 | Civco Medical Instruments Co., Inc. | Drainage catheter with bifurcating tip |
US7575571B2 (en) * | 2002-10-29 | 2009-08-18 | Medtronic, Inc. | Indexing cell delivery catheter |
US7182745B2 (en) * | 2003-03-25 | 2007-02-27 | Boston Scientific Scimed, Inc. | Retaining stent |
US7357818B2 (en) * | 2003-03-26 | 2008-04-15 | Boston Scientific Scimed, Inc. | Self-retaining stent |
EP1684824B1 (en) | 2003-11-20 | 2015-08-12 | The Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc. | Portable hand pump for evacuation of fluids |
US7338530B2 (en) * | 2003-11-24 | 2008-03-04 | Checkmed Systems, Inc. | Stent |
US6929664B2 (en) * | 2003-12-05 | 2005-08-16 | Fossa Medical, Inc. | Open lumen stents |
US20050203425A1 (en) | 2004-03-10 | 2005-09-15 | Phil Langston | Coaxial dual lumen pigtail catheter |
CA2897218A1 (en) | 2004-06-17 | 2006-01-26 | Thrasos Innovation, Inc. | Tdf-related compounds and analogs thereof |
US8337475B2 (en) | 2004-10-12 | 2012-12-25 | C. R. Bard, Inc. | Corporeal drainage system |
US8403952B2 (en) * | 2004-12-27 | 2013-03-26 | Spatz-Fgia, Inc. | Floating gastrointestinal anchor |
US20060142731A1 (en) * | 2004-12-27 | 2006-06-29 | Jeffrey Brooks | Floating gastro-intestinal anchor |
US9974680B2 (en) | 2004-12-27 | 2018-05-22 | Spatz Fgia, Inc. | System and methods for internalization of external components of adjustable intragastric balloon |
WO2014082044A1 (en) | 2012-11-26 | 2014-05-30 | Spatz Fgia, Inc. | System and methods for internalization of components of an adjustable intragastric balloon |
US8083806B2 (en) * | 2005-02-04 | 2011-12-27 | Poly-Med, Inc. | Radiation and radiochemically sterilized fiber-reinforced, composite urinogenital stents |
US7641630B2 (en) * | 2005-03-11 | 2010-01-05 | Merit Medical Systems, Inc. | Drainage catheter hub with locking cam |
US7736331B2 (en) * | 2005-03-11 | 2010-06-15 | Merit Medical Systems, Inc. | Drainage catheter hub with welded suture and sidewall stylet |
US20060212009A1 (en) * | 2005-03-16 | 2006-09-21 | Accisano Nicholas G Iii | Drainage catheter hub with rotatable lever handle |
US7396366B2 (en) | 2005-05-11 | 2008-07-08 | Boston Scientific Scimed, Inc. | Ureteral stent with conforming retention structure |
US7824367B2 (en) * | 2005-08-17 | 2010-11-02 | Merit Medical Systems, Inc. | Drainage catheter with locking hub |
US8299212B2 (en) | 2005-09-20 | 2012-10-30 | Thrasos Therapeutics, Inc. | TDF-related compounds and analogs thereof, analogs and bioactive fragments |
US8177772B2 (en) | 2005-09-26 | 2012-05-15 | C. R. Bard, Inc. | Catheter connection systems |
US8292946B2 (en) * | 2005-10-25 | 2012-10-23 | Boston Scientific Scimed, Inc. | Medical implants with limited resistance to migration |
US8016794B2 (en) | 2006-03-09 | 2011-09-13 | Interrad Medical, Inc. | Anchor device and method |
WO2007110866A2 (en) * | 2006-03-28 | 2007-10-04 | Spatz-Fgia Inc | Floating gastrointestinal anchor |
US8702720B2 (en) * | 2006-05-03 | 2014-04-22 | Cook Medical Technologies Llc | Tassel tip wire guide |
US20080294255A1 (en) * | 2006-05-23 | 2008-11-27 | Donald Albert Gonzales | Sinus Tube |
US8066824B2 (en) * | 2006-07-07 | 2011-11-29 | Intezyne Technologies, Inc. | Covalent modification of metal surfaces |
US7774808B2 (en) | 2006-08-01 | 2010-08-10 | Att Knowledge Ventures, L.P. | Method and apparatus for distributing geographically restricted video data in an internet protocol television (IPTV) system |
US9233226B2 (en) * | 2006-08-22 | 2016-01-12 | Merit Medical Systems, Inc. | Drainage catheter with pig-tail straightener |
US20080051911A1 (en) * | 2006-08-23 | 2008-02-28 | Wilson-Cook Medical Inc. | Stent with antimicrobial drainage lumen surface |
WO2008092013A1 (en) * | 2007-01-26 | 2008-07-31 | Wilson-Cook Medical Inc. | Implantable drainage device with planar dual curved portion |
US8213426B2 (en) | 2007-01-30 | 2012-07-03 | At&T Ip I, Lp | Method and system for multicasting targeted advertising data |
US8221505B2 (en) | 2007-02-22 | 2012-07-17 | Cook Medical Technologies Llc | Prosthesis having a sleeve valve |
US20100121371A1 (en) * | 2007-04-30 | 2010-05-13 | Spatz Fgia, Inc. | Non-endoscopic insertion and removal of a device |
US8956419B2 (en) | 2007-05-14 | 2015-02-17 | Boston Scientific Scimed, Inc. | Open lumen stent |
US7753889B2 (en) | 2007-06-15 | 2010-07-13 | Interrad Medical, Inc. | Anchor instrumentation and methods |
US8066755B2 (en) | 2007-09-26 | 2011-11-29 | Trivascular, Inc. | System and method of pivoted stent deployment |
US8663309B2 (en) | 2007-09-26 | 2014-03-04 | Trivascular, Inc. | Asymmetric stent apparatus and method |
US8226701B2 (en) | 2007-09-26 | 2012-07-24 | Trivascular, Inc. | Stent and delivery system for deployment thereof |
CN101917929A (en) | 2007-10-04 | 2010-12-15 | 特里瓦斯库拉尔公司 | Modular vascular graft for low profile percutaneous delivery |
US8328861B2 (en) | 2007-11-16 | 2012-12-11 | Trivascular, Inc. | Delivery system and method for bifurcated graft |
US8083789B2 (en) | 2007-11-16 | 2011-12-27 | Trivascular, Inc. | Securement assembly and method for expandable endovascular device |
US8235948B2 (en) | 2008-06-27 | 2012-08-07 | Interrad Medical, Inc. | System for anchoring medical devices |
US8038653B2 (en) | 2008-07-16 | 2011-10-18 | Interrad Medical, Inc. | Anchor systems and methods |
WO2010032347A1 (en) * | 2008-09-18 | 2010-03-25 | パナソニック株式会社 | Diffractive optical element and manufacturing method thereof |
US8328764B2 (en) | 2009-02-06 | 2012-12-11 | Interrad Medical, Inc. | System for anchoring medical devices |
US8414559B2 (en) | 2009-05-07 | 2013-04-09 | Rainbow Medical Ltd. | Gastroretentive duodenal pill |
US20110054448A1 (en) * | 2009-08-28 | 2011-03-03 | Navilyst Medical, Inc. | Medical device containing catheter anchoring feature |
US9339631B2 (en) | 2009-09-25 | 2016-05-17 | Boston Scientific Scimed, Inc. | Locking mechanism for a medical device |
US8753303B2 (en) | 2009-09-25 | 2014-06-17 | Boston Scientific Scimed, Inc. | Delivery system having stent locking structure |
US20110092998A1 (en) * | 2009-10-13 | 2011-04-21 | Spatz Fgia, Inc. | Balloon hydraulic and gaseous expansion system |
US9408733B2 (en) | 2009-12-30 | 2016-08-09 | Michael Devon Amos | Rotatable connection between a tubular member and an elongate wire of a catheter |
US8603185B2 (en) * | 2010-03-11 | 2013-12-10 | Cook Medical Technologies Llc | Stent geometry |
US8961581B2 (en) | 2010-05-25 | 2015-02-24 | Boston Scientific Scimed, Inc. | Delivery system having stent retention structure |
US8979824B2 (en) | 2010-06-21 | 2015-03-17 | Boston Scientific Scimed, Inc. | Stent delivery system having retention structure |
US8808348B2 (en) | 2010-06-23 | 2014-08-19 | Boston Scientific Scimed, Inc. | Delivery system having stent retention structure |
EP2593165B1 (en) * | 2010-07-12 | 2019-09-04 | Ramot at Tel-Aviv University Ltd. | Cannula with anchoring elements |
US8696732B2 (en) | 2010-08-04 | 2014-04-15 | Boston Scientific Scimed, Inc. | Stent delivery system |
US8518020B2 (en) * | 2010-08-23 | 2013-08-27 | Mayo Foundation For Medical Education And Research | Safety urinary catheter |
US8343108B2 (en) | 2010-09-29 | 2013-01-01 | Interrad Medical, Inc. | Systems and methods for anchoring medical devices |
WO2012051438A1 (en) | 2010-10-14 | 2012-04-19 | Boston Scientific Scimed, Inc. | Outer tube for stent repositioning and deployment |
WO2012061164A1 (en) | 2010-10-25 | 2012-05-10 | Kevin Mauch | Catheter apparatuses having multi-electrode arrays for renal neuromodulation and associated systems and methods |
JP2014501567A (en) | 2010-11-19 | 2014-01-23 | ボストン サイエンティフィック サイムド,インコーポレイテッド | Fast exchange stent delivery system |
US20130197536A1 (en) * | 2011-04-07 | 2013-08-01 | Jai Singh | General uterine manipulator and system |
CN203647441U (en) | 2011-04-07 | 2014-06-18 | 基万·史蒂文·辛格 | Uterine manipulator system |
US9987042B2 (en) | 2011-04-07 | 2018-06-05 | Jai Singh | General uterine manipulator and system |
US10849771B2 (en) | 2011-06-27 | 2020-12-01 | Boston Scientific Scimed, Inc. | Stent delivery systems and methods for making and using stent delivery systems |
US8574221B2 (en) | 2011-09-09 | 2013-11-05 | Cook Medical Technologies Llc | Tubular medical device |
US8936576B2 (en) | 2011-09-15 | 2015-01-20 | Interrad Medical, Inc. | System for anchoring medical devices |
US8932263B2 (en) | 2012-02-17 | 2015-01-13 | Interrad Medical, Inc. | Anchoring an intravenous cannula |
US8992595B2 (en) | 2012-04-04 | 2015-03-31 | Trivascular, Inc. | Durable stent graft with tapered struts and stable delivery methods and devices |
US9498363B2 (en) | 2012-04-06 | 2016-11-22 | Trivascular, Inc. | Delivery catheter for endovascular device |
US9532837B2 (en) | 2012-04-20 | 2017-01-03 | Jiwan Steven Singh | Repositionable medical instrument support systems, devices, and methods |
BR112014028131A2 (en) | 2012-05-11 | 2017-06-27 | Medtronic Ardian Luxembourg | catheter apparatus, renal neuromodulation system, and method for performing renal neuromodulation |
US9314596B2 (en) | 2012-10-11 | 2016-04-19 | Interrad Medical, Inc. | Systems and methods for anchoring medical devices |
US9095321B2 (en) | 2012-11-21 | 2015-08-04 | Medtronic Ardian Luxembourg S.A.R.L. | Cryotherapeutic devices having integral multi-helical balloons and methods of making the same |
US9550043B2 (en) | 2012-12-13 | 2017-01-24 | Interrad Medical, Inc. | Systems and methods for anchoring medical devices |
US9415190B2 (en) | 2013-02-13 | 2016-08-16 | Interrad Medical, Inc. | Systems and methods for anchoring medical devices |
US9179974B2 (en) | 2013-03-15 | 2015-11-10 | Medtronic Ardian Luxembourg S.A.R.L. | Helical push wire electrode |
US9381321B2 (en) | 2013-05-03 | 2016-07-05 | Interrad Medical, Inc. | Systems and methods for anchoring medical devices |
JP5408682B1 (en) * | 2013-06-28 | 2014-02-05 | ガデリウス・メディカル株式会社 | Stent kit |
US20150073515A1 (en) | 2013-09-09 | 2015-03-12 | Medtronic Ardian Luxembourg S.a.r.I. | Neuromodulation Catheter Devices and Systems Having Energy Delivering Thermocouple Assemblies and Associated Methods |
EP3129097B1 (en) * | 2014-04-10 | 2022-03-02 | C. R. Bard, Inc. | Ureteral stents |
JP2017513600A (en) | 2014-04-24 | 2017-06-01 | メドトロニック アーディアン ルクセンブルク ソシエテ ア レスポンサビリテ リミテ | Nerve adjustment catheter with braided shaft and related systems and methods |
WO2015179140A1 (en) | 2014-05-21 | 2015-11-26 | Boston Scientific Scimed, Inc. | Stent delivery system |
CN104800960B (en) * | 2015-05-11 | 2017-08-08 | 大连大学 | Band water-bag type bile pancreatic juice drainage pipe |
CN104784809B (en) * | 2015-05-11 | 2017-07-25 | 大连大学 | Integral type bile pancreatic juice drainage pipe |
CN104826217B (en) * | 2015-05-11 | 2018-01-16 | 大连大学 | Bile pancreatic juice drainage pipe |
CN104826216B (en) * | 2015-05-11 | 2017-07-18 | 大连大学 | Button loop formula bile pancreatic juice drainage pipe |
US10207085B2 (en) * | 2016-05-19 | 2019-02-19 | Timothy Murphy | Medical drainage catheter with break-away tip and extraluminal retention apparatus |
AU2017299466B2 (en) | 2016-07-18 | 2022-07-14 | Merit Medical Systems, Inc. | Inflatable radial artery compression device |
US10518069B2 (en) | 2016-10-28 | 2019-12-31 | Integra LifeSciences Switzerland Sarl | Implantable valve assembly with extended lifespan |
MX2019009497A (en) | 2017-02-09 | 2020-01-30 | Spatz FGIA Ltd | Check valve with docking station for gastrointestinal balloon. |
GB201714337D0 (en) * | 2017-09-06 | 2017-10-18 | Univ Southampton | Stent with streamlined side holes |
CN112469371A (en) | 2018-07-29 | 2021-03-09 | Bvw控股公司 | Biliary tract stent |
US11065438B2 (en) * | 2019-02-07 | 2021-07-20 | Synecor Llc | Systems and methods for transseptal delivery of percutaneous ventricular assist devices and other non-guidewire based transvascular therapeutic devices |
US11129968B2 (en) * | 2019-09-13 | 2021-09-28 | Ethicon, Inc. | Methods of making and implanting barbed microcatheters having fluid egress openings for infusing therapeutic fluids |
WO2024015301A1 (en) | 2022-07-11 | 2024-01-18 | Bvw Holding Ag | Anti-fouling stent |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3938529A (en) * | 1974-07-22 | 1976-02-17 | Gibbons Robert P | Indwelling ureteral catheter |
US4230123A (en) * | 1978-10-31 | 1980-10-28 | Hawkins Jr Irvin F | Needle sheath complex and process for decompression and biopsy |
US4382445A (en) * | 1980-12-04 | 1983-05-10 | Cosmos Research Associates | Physiological fluid shunt system and improvements therefor |
US4462402A (en) * | 1982-11-15 | 1984-07-31 | Minnesota Mining And Manufacturing Company | Method and anchor for anchoring |
US4531933A (en) * | 1982-12-07 | 1985-07-30 | C. R. Bard, Inc. | Helical ureteral stent |
DE3314755A1 (en) * | 1983-04-23 | 1984-11-08 | Medizin-Technische Werkstätte Arzt- und Krankenhausbedarf Wolfgang Haag, 4230 Wesel | Endoprosthesis to be implanted with a duodenoscope, especially as transpapillary bile duct drain, in the form of a drainage tube provided with drainage holes in the wall |
JPS60187737U (en) * | 1984-05-23 | 1985-12-12 | オリンパス光学工業株式会社 | Indwelling tube guide device |
US4643716A (en) * | 1984-09-26 | 1987-02-17 | The Kendall Company | Multi-size ureteral stent |
US4699611A (en) * | 1985-04-19 | 1987-10-13 | C. R. Bard, Inc. | Biliary stent introducer |
SE459473B (en) * | 1987-02-13 | 1989-07-10 | Stig Bengmark | HOSE DEVICE, SPECIFICALLY BEFORE ADMINISTRATION OF FOODS DIRECTLY IN THE GAS |
US4913683A (en) * | 1988-07-05 | 1990-04-03 | Medical Engineering Corporation | Infusion stent system |
JPH0228247U (en) * | 1988-08-11 | 1990-02-23 | ||
US4957479A (en) * | 1988-10-17 | 1990-09-18 | Vance Products Incorporated | Indwelling ureteral stent placement apparatus |
US4950228A (en) * | 1990-01-10 | 1990-08-21 | Knapp Jr Peter M | Ureteral stent |
-
1990
- 1990-04-04 US US07/504,575 patent/US5052998A/en not_active Expired - Lifetime
-
1991
- 1991-03-27 JP JP3507601A patent/JP3050597B2/en not_active Expired - Fee Related
- 1991-03-27 CA CA002078211A patent/CA2078211C/en not_active Expired - Fee Related
- 1991-03-27 EP EP91908114A patent/EP0523176B1/en not_active Expired - Lifetime
- 1991-03-27 AT AT91908114T patent/ATE184493T1/en not_active IP Right Cessation
- 1991-03-27 DE DE69131614T patent/DE69131614T2/en not_active Expired - Fee Related
- 1991-03-27 WO PCT/US1991/002048 patent/WO1991015254A1/en active IP Right Grant
- 1991-03-27 AU AU76751/91A patent/AU647119B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP0523176A4 (en) | 1993-09-15 |
ATE184493T1 (en) | 1999-10-15 |
DE69131614D1 (en) | 1999-10-21 |
WO1991015254A1 (en) | 1991-10-17 |
CA2078211A1 (en) | 1991-10-05 |
US5052998A (en) | 1991-10-01 |
AU647119B2 (en) | 1994-03-17 |
DE69131614T2 (en) | 2000-05-31 |
JP3050597B2 (en) | 2000-06-12 |
JPH05505747A (en) | 1993-08-26 |
EP0523176A1 (en) | 1993-01-20 |
EP0523176B1 (en) | 1999-09-15 |
AU7675191A (en) | 1991-10-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2078211C (en) | Indwelling stent and method of use | |
US5269802A (en) | Prostatic stent | |
US8979870B2 (en) | Distal release retrieval assembly and related methods of use | |
EP0525110B1 (en) | Device for the treatment of constricted vessels | |
US20180235651A1 (en) | Radial cutter implant | |
KR100276151B1 (en) | System for catheter fixation | |
US8343170B2 (en) | Method and device for extracting objects from the body | |
EP3328317B1 (en) | Retracting or/and supporting periurethral tissue | |
US8603187B2 (en) | Device for dilating the urethra of the body of a patient and device for removing prostate tissue | |
US8287602B2 (en) | Urinary stent | |
CN115666355A (en) | Device for treating benign prostatic hyperplasia and associated lower urinary tract symptoms | |
Kirchheim et al. | Transurethral urethrotomy under vision | |
US20210059704A1 (en) | Urethral implant delivery system and method | |
JP6984953B2 (en) | Urinary stent | |
Durano et al. | A new alternative treatment for entrapped stone basket in the distal ureter | |
Laugier et al. | Endoscopic treatment in chronic pancreatitis | |
EP2211765B1 (en) | Vein filter | |
KR100560607B1 (en) | A medical device for removing alien substance | |
CN113693680A (en) | Biliary stent | |
Hatfield | Endoscopic Therapy in Chronic Pancreatitis | |
Vitale | Therapeutic ERCP |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |