US20090270909A1 - Back-loading catheter - Google Patents
Back-loading catheter Download PDFInfo
- Publication number
- US20090270909A1 US20090270909A1 US12/498,115 US49811509A US2009270909A1 US 20090270909 A1 US20090270909 A1 US 20090270909A1 US 49811509 A US49811509 A US 49811509A US 2009270909 A1 US2009270909 A1 US 2009270909A1
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- United States
- Prior art keywords
- guidewire
- lumen
- distal
- main body
- proximal
- Prior art date
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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
- A61F2/01—Filters implantable into blood vessels
- A61F2/011—Instruments for their placement or removal
-
- 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
- A61F2/01—Filters implantable into blood vessels
- A61F2002/018—Filters implantable into blood vessels made from tubes or sheets of material, e.g. by etching or laser-cutting
-
- 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
- A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
- A61F2230/0004—Rounded shapes, e.g. with rounded corners
- A61F2230/0008—Rounded shapes, e.g. with rounded corners elliptical or oval
-
- 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
- A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2230/0063—Three-dimensional shapes
- A61F2230/0073—Quadric-shaped
- A61F2230/008—Quadric-shaped paraboloidal
Abstract
A catheter provided with a collapsible inner lumen within a main body. The catheter can deploy a distal protection device using a guidewire which is threaded through the inner lumen, the inner lumen collapsing upon retrieval of the device into the catheter main body.
Description
- This Application is a continuation of U.S. application Ser. No. 10/863,726, filed Jun. 8, 2004, which is a continuation of U.S. application Ser. No. 10/369,406, filed Feb. 14, 2003, now U.S. Pat. No. 6,793,648, issued Sep. 21, 2004, which is a continuation of U.S. application Ser. No. 09/631,482, filed Aug. 3, 2000, now U.S. Pat. No. 6,527,746, issued Mar. 4, 2003, hereby incorporated herein by reference.
- The present invention relates to medical treatment apparatus, such as distal protection devices, deployed in a vessel of the body. In one of its more particular aspects this invention relates to the retrieval of such devices. More specifically, the invention relates to a catheter designed for ready retrieval of medical devices.
- Any intervention into the human vasculature that uses a guidewire or medical device attached to a guidewire may require back-loading the catheter during the course of the medical procedure. Back loading a guidewire into a catheter from the distal end of the catheter to an exit port positioned proximal from the distal end of the catheter can be difficult without a guiding means. To facilitate back-loading, a guidewire lumen, separate from the catheter main body, may be used. Such a separate lumen can run from proximate the distal end of the catheter to a desired exit location proximate the guidewire entry location.
- Medical apparatus, such as distal protection devices, are utilized in both over-the-wire and rapid exchange type catheters. While, typically, there are no unique problems encountered during deployment of such devices, problems can be encountered during device retrieval after an interventional procedure.
- During the course of a medical procedure, the need may arise to capture debris, such as grumous matter, emboli, thrombi from the affected vessel. Filters of various types have found use, for example, in trapping blood clots and other debris released into the blood stream. Filters are traps that have been designed to be used to collect dislodged matter such as described above. They serve to provide protection from distal embolization that might result in a major adverse coronary event or other acute complication. Embolization of debris which might be released during such procedures and the resulting sequellae have been described in reports documenting major adverse cardiac event rates. Such events include acute myocardial infarction, revascularization and even death.
- In order to address such acute embolic-related complications, distal filtration and protection devices have been developed. Such devices have been designed to work with existing interventional modalities. Such devices provide debris-filtering protection during invasive procedures and are intended to prevent complications of particulate embolization.
- Such distal filtration and protection devices are typically deployed at a location along a vessel of the body at a desired location. Such deployment is performed by extending the device outwardly from the distal end of a catheter. In order to facilitate deployment, the device to be deployed typically has components made from a shape-memory or highly elastic material. Consequently, they are able to be collapsed within the catheter and, upon being urged outwardly beyond the distal end of the catheter, they reassume their uncollapsed shape.
- Once in place, the protection device performs the function of filtering debris as discussed above. Retrieval of a debris-filled filter offers unique problems.
- Since the retrieval of a distal protection device requires a minimum inside diameter to remove the device filled with captured debris, it can be difficult to retrieve a device into a recovery catheter. In order to facilitate back-loading, a separate guidewire lumen may be used. Such a lumen must be configured, however, to be retracted within the catheter main body to afford access to the distal protection device during retrieval. If the lumen does not move, or allow retrieval of the distal protection device into the catheter main body, the captured debris will not be properly retrieved into the distal end of the recovery catheter.
- Alternatively, debris may be removed from the distal protection device by means of suction while the distal protection device is still deployed in the vasculature. Suction through the catheter main body could aspirate captured debris from the distal protection device using a syringe or similar device attached to the proximal end of the catheter. Since the main body could be sealed off from the guidewire lumen, pressure losses would not occur resulting in decreased aspiration performance.
- No device has yet been developed which is effective to accomplish debris removal in a simple manner.
- It is an object of the present invention to provide a catheter in which the removal of debris can be accomplished in a simple, effective manner.
- Another object of the invention is to facilitate retrieval of a distal protection device or other medical apparatus.
- Another object of the invention is to simplify back-loading a guidewire and device carried by the guidewire into a large inside diameter catheter.
- Another object of this invention is to facilitate effective aspiration from a filter deployed in a body vessel.
- Other objects and advantages of the present invention will become apparent from the following DETAILED DESCRIPTION OF THE INVENTION.
- The catheter of the present invention, in one embodiment, is provided with a collapsible inner lumen which can be used to back-load a guidewire or a device having been deployed on a guidewire. The catheter comprises a catheter main body which is equipped, in that embodiment, with a collapsible inner lumen. The inner lumen is adapted to receive the guidewire. The guidewire may be fed, external of the patient being treated, into the lumen through the distal end of the lumen. The guidewire was previously inserted into the patient mounting a medical device such as a distal protection device. Following its use to capture debris, the protection device is retrieved. Upon retrieval the inner lumen collapses, allowing the filter basket containing debris to be received into the catheter main body.
- The collapsible inner lumen can serve as a guidewire conduit extending from the distal end of the catheter main body to a proximal location at the exit port.
- It may be appropriate to aspirate through the catheter to remove debris from the filter basket prior to retrieval. Having the inner lumen of the present invention communicating with, and sealed at, the exit port, the present catheter has been found to be an effective way of preventing pressure losses during aspiration, since the lumen is isolated from the interior of the main body of the catheter.
- The inner lumen of this embodiment of the catheter of the present invention can be constructed from a variety of thin-walled flexible tubing materials such as thin-walled polytetrafluoroethylene tubing. The thin-walled tubing to be used as the inner lumen of the present invention should collapse when subjected to a minimal axial force, yet should have sufficient axial strength to prevent kinking during back-loading a guidewire. The minimal axial force for collapsing the inner lumen has been found to fall in the range of about 100 grams to about 500 grams.
- The inner lumen can be recessed within the distal end of the catheter main body for about 15-40 cm in the proximal direction in a rapid exchange version. The inner lumen, in this embodiment, is fixed at a proximal end, and can be free floating or attached at the distal end, as desired.
- In operation, a distal protection device such as a filter basket is pulled into the distal end of the catheter main body, and the inner lumen collapses under minimal force for retrieval.
- In another embodiment of the present invention, the inner lumen is also fixed at a proximal end. As in the first embodiment discussed above, it can be free-floating or attached at its distal end. In this embodiment, however, the lumen does not collapse when subjected to a minimal axial force. Rather, a wall of the lumen is provided with a series of axially extending perforations. When the guidewire is withdrawn to retract, for example, a filter basket, the guidewire “cuts” the inner lumen axially along the line of perforation. The guidewire rides up the slit thereby formed, and the filter basket is retracted into the catheter main body passing alongside the inner lumen external with respect thereto.
- A further embodiment of the invention includes an inner lumen which is not fixed at its proximal end with respect to the catheter main body. Rather, in this embodiment, the inner lumen is retractable through the exit port, in effect, to withdraw the distal end thereof to recess it within the catheter main body. Such retraction can be accomplished by retracting the guidewire external to the patient being treated.
- The present invention is thus an improved catheter for back-loading a device such as a filter having previously been deployed on a guidewire in vasculature of an individual. More specific features and advantages obtained in view of those features will become apparent with reference to the DETAILED DESCRIPTION OF THE INVENTION, appended claims, and accompanying drawing figures.
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FIG. 1 is a fragmentary perspective view of an inner lumen as used in combination with a distal protection device in accordance with the present invention; -
FIG. 2 is a detailed perspective view of the inner lumen/distal protection device ofFIG. 1 as employed in a first embodiment of the invention prior to recovery of the distal protection device; -
FIG. 3 is a perspective view of the embodiment ofFIG. 1 in a recovered position; -
FIG. 4 is a detailed perspective view of the inner lumen/distal protection device ofFIG. 1 as employed in a second embodiment of the invention prior to recovery of the distal protection device; -
FIG. 5 is a perspective view of the embodiment ofFIG. 4 in a recovered position; -
FIG. 6 is a detailed perspective view of the inner lumen/distal protection device ofFIG. 1 as employed in a third embodiment of the invention prior to recovery of the distal protection device; and -
FIG. 7 is a perspective view of the embodiment ofFIG. 6 in a recovered position. - Referring now to the drawing figures wherein like reference numerals denote like elements throughout the several views,
FIG. 1 illustrates afilter basket 32, of a type known in the prior art, having a definedopen mouth 33 into which grumous material and the like can be caught during the performance of a medical procedure in vasculature of a patient. It will be understood that, while the invention is described herein with respect to positioning of a distal protection device in the vascular of an individual patient, the invention's scope extends beyond this specific application. -
FIG. 1 illustrates filterbasket 32 attached to aguidewire 26 by means of connection means. That figure illustrates adistal connector 34 which, typically, would be affixed at a defined axial point alongguidewire 26. In most applications, this point of affixation would be proximate thedistal end 28 ofguidewire 26.FIG. 1 also illustratesguidewire 26 passing through atube 38 carried byfilter basket 32. - At the proximal or open end of
filter basket 32, it is secured to guidewire 26 byproximal connector 36. Whileconnector 36 can be rigidly connected to guidewire 26 at a defined axial location, it will be understood that, in some applications, it can be allowed to float alongguidewire 26. -
Guidewire 26, it will be understood, passes into the vasculature of the patient through a location of access. When it is appropriate to removefilter basket 32 from the anatomy of the patient, it would, typically, be filled with grumous material, emboli and/or other anatomical debris. It is, of course, desirable, and even essential, that such debris not be allowed to be redeposited within the vasculature. Various procedures have been used over the years to ensure compliance with these necessities. - The present invention is an improved catheter which can be used for back-loading a device such as a
filter basket 32 into a recovery catheter to withdraw the distal protection device from the patient's vasculature. In order to facilitate this effort, thedistal end 20 of aninner lumen 18 is fed over the guidewire at the point of access on the patient. While not essential, thedistal end 20 of theinner lumen 18 can extend at least a short distance outwardly from adistal end 14 of a cathetermain body 12. By so constructing the catheter in accordance with the present invention, guidewire 26 can be more easily fed intoinner lumen 18. -
FIG. 2 illustrates a cathetermain body 12 fed into the vasculature to a point where adistal end 20 oflumen 18 is closelyproximate filter basket 32 andproximal connector 36 therefor. With the cathetermain body 12 at this location, the individual performing the procedure can then withdrawguidewire 26, by grasping and drawingguidewire 26 at itsproximal end 30, and retractingfilter basket 32 into large inside diameter cathetermain body 12. -
FIG. 2 illustratesproximal end 22 ofinner lumen 18 fixedly connected to wall 15 defining cathetermain body 12 atexit port 24 and in communication with the outside of cathetermain body 12 throughport 24. It is in this manner that guidewire 26 is accessible to the surgeon or other person performing the procedure. - As will be able to be seen, however,
distal end 20 oflumen 18, while having served an important function inpositioning recovery catheter 10 for retraction offilter basket 32 into cathetermain body 12, can to one degree or another obstruct retrieval offilter basket 32. The present invention, therefore, contemplates, in the embodiment ofFIGS. 2 and 3 , alumen 18 wherein at least a portion oflumen 18 at thedistal end 20 thereof is corrugated or accordion-like in construction.Inner lumen 18 can be made from a variety of thin-walled, flexible tubing materials. One particularly appropriate material is polytetrafluoroethylene. Such a material enablesdistal end 20 oflumen 18 to collapse when subjected to a minimal axial force such as that brought to bear upon it byfilter basket 32. It is envisioned thatdistal end 20 oflumen 18 should be sufficiently strong so as to prevent kinking, but sufficiently weak so as to collapse when an axial force of between 100 grams and 500 grams is brought to bear. - While the embodiment illustrated in
FIGS. 2 and 3 and described to this point specifically employs corrugations or accordion-like folds, it will be understood that this embodiment need not specifically employ such structure. In a preferred embodiment of the invention, theinner lumen 18 can merely be formed of a material that satisfies the desirable dictates for the invention but does not specifically have corrugations or accordion-like folds. That is, thewall defining lumen 18 can merely be sufficiently weak so as to collapse when subjected to the axial force brought to bear upon it byfilter basket 32. - As seen in
FIG. 3 , a sufficient axial dimension oflumen 18 is provided with corrugation or accordion-like structure so thatfilter basket 32 can be housed within cathetermain body 12 and be substantially fully retracted in a proximal direction whereindistal end 28 ofguidewire 26 is in a proximal direction fromdistal end 14 ofmain body 12. Withfilter basket 32 in this position, aspiration by suction can be applied to catheter main body to remove the debris frombasket 32. In order to facilitate such aspirationproximal end 22 oflumen 18 can be sealed and thereby isolated fromchannel 17 withinmain body 12 atexit port 24. - In this embodiment of the invention, the
distal end 20 oflumen 18 defines a wall which is circumferentially continuous throughout a full 360°. Initially, that axial position is proximatedistal end 14 ofmain body 12. As previously discussed, that location can be either slightly proximal or distal with respect todistal end 14 ofmain body 12. After lumen 18 collapses, however, that point becomes recessed within cathetermain body 12 to a location illustrated at 41. Thus, filterbasket 32 is able to be fully housed within cathetermain body 12. - Referring to
FIGS. 4 and 5 , a second embodiment of the invention is illustrated. The embodiment ofFIGS. 4 and 5 is quite similar to that ofFIGS. 2 and 3 . In this embodiment, however,inner lumen 18′ does not collapse. Still anchored and sealed atexit port 24 at itsproximal end 22′,lumen 18′ does, nevertheless, allow for an apparent axial movement of the axial point at which lumen 18′ is circumferentially continuous through a full 360°. This is accomplished by defining an axially extending line ofperforation 21 indistal end 20′ oflumen 18′. Asguidewire 26 is retracted to drawfilter basket 32 intomain body 12 ofcatheter 10, engagement offastener 36 withdistal end 20′ oflumen 18′ will causeperforation line 21 to fracture and progressively defineslot 40. As continued pressure is applied to drawfilter basket 32 intochannel 17 withinmain body 12,proximal fastener 36, attached to proximal end offilter basket 32, will ride externally alongdistal end 20′ oflumen 18′ asslot 40 is progressively opened.Filter basket 32 will then move inward withinchannel 17 in a proximal direction with respect todistal end 20′ oflumen 18′ until it achievesposition 41, the adjusted location at which lumen 18′ is circumferentially continuous through a full 360°. Withfilter basket 32 at this position, it will be fully housed within cathetermain body 12. -
FIGS. 6 and 7 illustrate a third embodiment in accordance with the present invention. In this embodiment,lumen 18″ is not fixed atexit port 24. Rather,proximal end 22″ oflumen 18″ extends through, and is slidable with respect to,port 24. As in the case of the first two embodiments,distal end 20″ oflumen 18″ is initially located axially proximatedistal end 14 ofmain body 12. Upon engagement ofproximal connector 36 withdistal end 20″ oflumen 18″,lumen 18″ can be manually retracted throughexit port 24. This will enable filterbasket 32 to be fully housed withinchannel 17 inmain body 12, as illustrated inFIG. 7 . Again, while the circumferentially continuous through 360° location of the wall oflumen 18″ was initially proximatedistal end 14 ofmain body 12,FIG. 7 illustrates that axial point now being recessed withinmain body 12 toaxial location 41. - While not essential to the invention,
inner lumen 18″, in this embodiment, can be provided with astop 44 for limiting the distance to whichfilter basket 32 can be retracted.Stop 44 can comprise an annular bead formed about the outer wall oflumen 18″. Positioning ofstop 44 is, of course, at a location with respect todistal end 20″ oflumen 18″ so that full housing offilter basket 32 will be permitted. -
Lumen 18″ can, if desired, also be provided with a second stop (not shown). Such a second stop can be provided at an axial location along lumen 18″ so that it is external to exitport 24. Such a stop would limit the ability to insertlumen 18″ beyond a desired position within cathetermain body 12. - In the case of all embodiments described, sealing of
lumen exit port 24 can be provide in order to enable aspiration of debris fromfilter basket 32 as previously discussed. In the two embodiments ofFIGS. 2-5 , such sealing and isolation of the lumen atexit port 24 is accomplished by integrally moldingproximal end exit port 24. In the embodiment ofFIGS. 6-7 , such seal can take the form of any appropriate mechanical seal atexit port 24. - It will be understood that this disclosure, in many respects, is only illustrative. Changes may be made in details, particularly in matters of shape, size, material, and arrangement of parts without exceeding the scope of the invention. Accordingly, the scope of the invention is as defined in the language of the appended claims.
Claims (17)
1. A system for use with a filter, comprising:
a catheter including an elongate shaft;
the elongate shaft having a proximal end, a distal end, and a side wall defining a shaft lumen;
a tubular member having a first end in fluid communication with an opening in the side wall of the elongate shaft, and a second end disposed within the shaft lumen;
the tubular member defining a guidewire lumen; and
the guidewire lumen being in communication with a distal guidewire port defined by the second end of the tubular member.
2. A system for delivering a filter, comprising;
a catheter including an elongate shaft;
the elongate shaft having a proximal end, a distal end, and a side wall defining a shaft lumen;
a tubular member having a first end in fluid communication with an opening in the side wall of the elongate shaft, and a second end disposed within the shaft lumen;
the tubular member defining a guidewire lumen; and
the guidewire lumen being in communication with a distal guidewire port defined by the distal end of the tubular member.
3. The system of claim 2 , wherein the distal guidewire port is disposed proximally of the distal end of the elongate shaft, and the proximal guidewire port is disposed proximally of the distal guidewire port.
4. The system of claim 3 , wherein the proximal guidewire port and the distal guidewire port are separated by a longitudinal distance.
5. The system of claim 4 , wherein a longitudinal distance between the proximal guidewire port and the distal guidewire port is less than about 55 centimeters.
6. The system of claim 4 , wherein a longitudinal distance between the proximal guidewire port and the distal guidewire port is less than about 45 centimeters.
7. The system of claim 4 , wherein a longitudinal distance between the proximal guidewire port and the distal guidewire port is less than about 35 centimeters.
8. The system of claim 2 , further including a filter disposed within a distal portion of the shaft lumen.
9. The system of claim 2 , further including a filter disposed within a distal portion of the shaft lumen and a guidewire extending from the filter through the guidewire lumen.
10. A system for delivering a filter, comprising;
a catheter including a main body;
the main body having a proximal end, a distal end, and a wall defining a main body lumen;
a tubular member having a first end in fluid communication with an opening in the wall of the main body, and a second end disposed within the main body lumen;
the tubular member defining a guidewire lumen; and
the guidewire lumen being in communication with a distal guidewire port defined by the distal end of the tubular member.
11. The system of claim 10 , wherein the distal guidewire port is disposed proximally of the distal end of the main body, and the proximal guidewire exit port is disposed proximally of the distal guidewire port.
12. The system of claim 11 , wherein the proximal guidewire exit port and the distal guidewire port are separated by a longitudinal distance.
13. The system of claim 12 , wherein a longitudinal distance between the proximal guidewire exit port and the distal guidewire port is less than about 55 centimeters.
14. The system of claim 12 , wherein a longitudinal distance between the proximal guidewire exit port and the distal guidewire port is less than about 45 centimeters.
15. The system of claim 12 , wherein a longitudinal distance between the proximal guidewire exit port and the distal guidewire port is less than about 35 centimeters.
16. The system of claim 10 , further including a filter disposed within a distal portion of the main body lumen.
17. The system of claim 10 , further including a filter disposed within a distal portion of the main body lumen and a guidewire extending from the filter through the guidewire lumen.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US12/498,115 US20090270909A1 (en) | 2000-08-03 | 2009-07-06 | Back-loading catheter |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/631,482 US6527746B1 (en) | 2000-08-03 | 2000-08-03 | Back-loading catheter |
US10/369,406 US6793648B2 (en) | 2000-08-03 | 2003-02-14 | Back-loading catheter |
US10/863,726 US7572271B2 (en) | 2000-08-03 | 2004-06-08 | Back-loading catheter |
US12/498,115 US20090270909A1 (en) | 2000-08-03 | 2009-07-06 | Back-loading catheter |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/863,726 Continuation US7572271B2 (en) | 2000-08-03 | 2004-06-08 | Back-loading catheter |
Publications (1)
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US20090270909A1 true US20090270909A1 (en) | 2009-10-29 |
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US10/369,406 Expired - Lifetime US6793648B2 (en) | 2000-08-03 | 2003-02-14 | Back-loading catheter |
US10/863,726 Expired - Fee Related US7572271B2 (en) | 2000-08-03 | 2004-06-08 | Back-loading catheter |
US12/498,115 Abandoned US20090270909A1 (en) | 2000-08-03 | 2009-07-06 | Back-loading catheter |
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US10/369,406 Expired - Lifetime US6793648B2 (en) | 2000-08-03 | 2003-02-14 | Back-loading catheter |
US10/863,726 Expired - Fee Related US7572271B2 (en) | 2000-08-03 | 2004-06-08 | Back-loading catheter |
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US8460372B2 (en) | 2006-11-07 | 2013-06-11 | Dc Devices, Inc. | Prosthesis for reducing intra-cardiac pressure having an embolic filter |
US8740962B2 (en) | 2006-11-07 | 2014-06-03 | Dc Devices, Inc. | Prosthesis for retrieval and deployment |
US8882697B2 (en) | 2006-11-07 | 2014-11-11 | Dc Devices, Inc. | Apparatus and methods to create and maintain an intra-atrial pressure relief opening |
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US9775636B2 (en) | 2013-03-12 | 2017-10-03 | Corvia Medical, Inc. | Devices, systems, and methods for treating heart failure |
US10413284B2 (en) | 2006-11-07 | 2019-09-17 | Corvia Medical, Inc. | Atrial pressure regulation with control, sensing, monitoring and therapy delivery |
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US7491216B2 (en) | 1997-11-07 | 2009-02-17 | Salviac Limited | Filter element with retractable guidewire tip |
EP1028670B1 (en) * | 1997-11-07 | 2008-01-02 | Salviac Limited | An embolic protection device |
US6918921B2 (en) * | 1999-05-07 | 2005-07-19 | Salviac Limited | Support frame for an embolic protection device |
DE20080298U1 (en) * | 1999-05-07 | 2001-12-20 | Salviac Ltd | Embolic protection device |
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Also Published As
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CA2354224A1 (en) | 2002-02-03 |
US6527746B1 (en) | 2003-03-04 |
US20040225259A1 (en) | 2004-11-11 |
JP2002102232A (en) | 2002-04-09 |
EP1177777A3 (en) | 2004-03-03 |
US20030125667A1 (en) | 2003-07-03 |
ATE431727T1 (en) | 2009-06-15 |
US6793648B2 (en) | 2004-09-21 |
US7572271B2 (en) | 2009-08-11 |
EP1177777B1 (en) | 2009-05-20 |
DE60138743D1 (en) | 2009-07-02 |
ES2324150T3 (en) | 2009-07-31 |
EP1177777A2 (en) | 2002-02-06 |
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