Source: http://www.google.com/patents/US5954729?ie=ISO-8859-1&dq=6,034,652
Timestamp: 2014-10-30 14:01:12
Document Index: 5554792

Matched Legal Cases: ['art 13', 'art 17', 'art 13', 'art 19', 'art 17', 'art 19', 'art 19', 'art 17', 'art 19', 'art 17']

Patent US5954729 - Transluminal implantation device - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA device for transluminal implantation of a substantially tubular, radially expansible stent. The device includes a central tube surrounded by an outer tube axially displaceable relative to the central tube, with the radial dimensions of the tubes being such as to form an annular space therebetween capable...http://www.google.com/patents/US5954729?utm_source=gb-gplus-sharePatent US5954729 - Transluminal implantation deviceAdvanced Patent SearchPublication numberUS5954729 APublication typeGrantApplication numberUS 08/957,179Publication dateSep 21, 1999Filing dateOct 24, 1997Priority dateJun 14, 1991Fee statusPaidAlso published asUS5591172, US5759186Publication number08957179, 957179, US 5954729 A, US 5954729A, US-A-5954729, US5954729 A, US5954729AInventorsMichel Bachmann, Robert B. NisselsOriginal AssigneeSchneider (Usa) Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (7), Referenced by (39), Classifications (18), Legal Events (3) External Links: USPTO, USPTO Assignment, EspacenetTransluminal implantation deviceUS 5954729 AAbstract A device for transluminal implantation of a substantially tubular, radially expansible stent. The device includes a central tube surrounded by an outer tube axially displaceable relative to the central tube, with the radial dimensions of the tubes being such as to form an annular space therebetween capable of accommodating the stent in an unexpanded state. The outer tube is axially displaceable relative to the central tube. In one embodiment of the device, the central tube, at a distal end thereof, is provided with a section of reduced diameter at the proximal end of which there is an undercut groove forming a circumferential flange within which a proximal end of the stent rests until release of the stent by rearward displacement of the outer tube. In a modification of the device, the central tube, at its distal end, includes a sleeve slidably positioned therearound for capturing at least a proximal portion of the stent restraining the proximal portion against movement until stent deployment.
We claim: 1. A delivery system for implantation of a medical device in a vessel, comprising:a medical device; an elongate catheter having proximal and distal ends for delivering the medical device to a predetermined location in a vessel of a patient, the elongate catheter being further comprised of:an inner shaft which carries the medical device near its distal end, a middle pull back shaft arranged around the inner shaft, the medical device being carried between the inner shaft and middle pull back shaft, and an outer stiffening shaft arranged around the middle pull back shaft, the inner and outer shafts being irremovably connected at their proximal ends to prevent axial movement of the inner shaft with respect to the outer shaft, whereby the medical device is delivered at the desired site by pulling on a proximal end of the middle pull back shaft, which deploys the medical device, and where the outer stiffening shaft connection to the inner shaft prevents axial movement of the inner shaft with respect to the outer stiffening shaft, thereby preventing the distal end of the inner shaft from being urged forward during delivery and therefore allowing for more accurate placement of the medical device. 2. The delivery system of claim 1 wherein the elongate catheter is flexible, and the outer stiffening shaft is concentrically arranged around the middle shaft which is concentrically arranged around the inner shaft.
3. The delivery system of claim 1 wherein the medical device has an axial length and further wherein the inner and outer shafts are connected together far enough apart to allow the middle pull back shaft to retract a distance at least as great as the axial length of the medical device to be delivered.
4. The delivery system of claim 1 wherein the inner shaft has a lumen.
5. The delivery system of claim 1 wherein the medical device is a self-expanding stent.
6. A method of delivering a medical device using the delivery system of claim 1, comprising the steps of:providing the delivery system of claim 1, moving the distal end of the elongate catheter to a delivery site, and delivering the medical device by pulling back on the middle pull back shaft which releases the medical device, whereby the outer stiffening shaft connection to the inner shaft prevents the distal end of the inner shaft from being urged forward as the middle pull back shaft is retracted, thereby allowing for more accurate placement of the medical device. 7. A delivery system for implantation of a medical device in a vessel, comprising:a medical device; an elongate catheter means having proximal and distal ends for delivering the medical device to a predetermined location in a vessel of a patient, the elongate catheter means being further comprised of:an inner shaft which carries the medical device near its distal end, a middle pull back shaft arranged around the inner shaft, the medical device being carried between the inner shaft and middle pull back shaft, and an outer stiffening shaft arranged around the middle pull back shaft, the inner and outer shafts being irremovably connected together at their proximal ends to prevent axial movement of the inner shaft with respect to the outer shaft during delivery of the medical device to the desired site and subsequent removal of the inner and outer shafts away from the medical device, whereby the medical device is delivered at the desired site by pulling on a proximal end of the middle pull back shaft, which deploys the medical device, and where the outer stiffening shaft connection to the inner shaft prevents axial movement of the inner shaft with respect to the outer stiffening shaft, thereby preventing the distal end of the inner shaft from being urged forward during delivery and therefore allowing for more accurate placement of the medical device. 8. The delivery system of claim 7 wherein the elongate catheter is flexible, and the outer shaft is concentrically arranged around the middle shaft which is concentrically around the inner shaft.
9. The delivery system of claim 7 wherein the medical device has an axial length and further wherein the inner and outer shafts are connected together far enough apart to allow the middle pull back shaft to retract a distance at least as great as the axial length of the medical device to be delivered.
10. The delivery system of claim 7 wherein the inner shaft has a lumen.
11. The delivery system of claim 7 wherein the medical device is a self-expanding stent.
12. A method of delivering a medical device using the delivery system of claim 7, comprising the steps of:providing the delivery system of claim 7, moving the distal end of the elongate catheter to a delivery site, and delivering the medical device by pulling back on the middle pull back shaft which releases the medical device, whereby the outer stiffening shaft connection to the inner shaft prevents the distal end of the inner shaft from being urged forward as the middle pull back shaft is retracted, thereby allowing for more accurate placement of the medical device. Description
This application is a division of application Ser. No. 08/723,939, filed Sep. 26, 1996, now U.S. Pat. No. 5,759,186, which is a division of application Ser. No. 08/207,324, filed Mar. 7, 1994, now U.S. Pat. No. 5,591,172 which is a continuation-in-part of application Ser. No. 07/891,887, filed on Jun. 1, 1992 now abandoned.
BACKGROUND OF THE INVENTION The present invention relates to a device for transluminal implantation of a substantially tubular, radially expansible stent.
SUMMARY OF THE INVENTION The present invention has for its main object to solve the problems associated with implantation devices capable of providing for insertion and release of prostheses or stents of different types, for example of the type disclosed in U.S. Pat. No. 4,655,771.
BRIEF DESCRIPTION OF THE DRAWINGS The present invention will now be described by a non-limiting example with reference to the appended drawings, wherein:
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The device or delivery system, shown in FIG. 1 is generally designated 1 and the device comprises in principal at the proximal end thereof operating means generally designated 3 and at the distal end thereof implantation means generally designated 5. The implantation means 5 is in the form of elongated catheter means which comprises a central (i.e. through the lumen of the central tube 7) tube generally designated 7 surrounded by an outer tube or pull back shaft 9, said outer tube 9 at the rear or proximal end thereof being surrounded by a further outer tube or stabilizing exterior tube 11 attached to operating means 3.
Central tube 7 is shown more in detail by exploded views in FIGS. 3 and 4. Central tube 7 contains a main part 13 provided with one opening 15 for a purpose to be explained below. Furthermore, it contains a middle part 17, the rear end of which can be inserted into and attached to the main part 13. Finally, central tube 7 includes a front end part 19 having a rear end 23 of reduced diameter and having a tapered shape for insertion into and fixation to the front end of the middle part 17. The front end part 19 of the central tube 7 is provided at its distal end with hooks or extensions 25 for a purpose to be further explained below. In the embodiment shown the number of hooks 25 is three as is evident from FIG. 5. The hooks are evenly distributed around the periphery of the front end part 19.
The middle part 17 of central tube 7 is at its distal end provided with a forwardly directed circumferential flange 21 which when the front end part 19 is inserted into the front end of middle part 17 forms an undercut groove or recess that can accommodate the rear end of stent 33 in the position shown in FIG. 1, i.e. with the stent (i.e. medical device) in a contracted state.
The outer tube 9 is shown by an exploded view in FIG. 2. At the distal end thereof it is provided with a rounded collar 29 to facilitate insertion during implantation. Furthermore, it is provided with axially extending elongate radial openings 31 for a purpose that will be explained below. At the rear end thereof outer tube 9 is surrounded by a stabilizing exterior tube or stiffening shaft 11 which is attached to the operating means 3, whereas the outer tube 9 is axially displaceable within the exterior tube 11. Preferably, stabilizing tube 11 maintains a fixed position.
In regard to the design of the rear end operating means 3, generally designated 3, reference is now made to FIGS. 1 and 6. FIG. 1 is an assembly drawing of the device, whereas FIG. 6 shows an exploded view of the device. Operating means 3 comprises a main body 35 and integral therewith a rear loop handle 37. Operating means 3 further includes a moveable second loop handle 39 which is displaceable between extreme positions within the main body 35 indicated by dashed lines and full lines in FIG. 1 illustrating retracted position and forward position, respectively. The outer tube 9 is permanently attached to the front end of the moveable second loop handle 39 and is thus axially moveable forward and backward between the extreme positions by moving loop handle 39. Operating means 3 includes a front safety catch release member 41 and a rear safety catch release member 43 corresponding to the two extreme positions indicated in FIG. 1 by positions B (full lines) and A (dashed lines), respectively. Release members 41, 43 cooperate with spring elements 51 and 53, respectively, provided on the upper side of the second loop handle 39 as shown in FIG. 6. These springing elements 51, 53 cooperate with safety catches 47, 49 provided on the inside of main body 35. By pressing release members 41, 43 springing elements 51 and 53, respectively, can be released from their engagement with the respective safety catches 47, 49 so that the second loop handle 39 can be axially displaced together with the associated outer tube 9.
Finally, the main body 35 at the rear end thereof is provided with a fluid inlet 45 allowing introduction of a fluid into the instrument, such as a liquid for flushing or a contrast medium for X-ray inspection. Such fluid entering fluid inlet 45 passes through opening 15 into and through the central tube 7 or inner shaft or for the removal of contaminants at the location of stent 33 or for providing contrast for X-ray inspection.
As noted above stabilizing tube 11 maintains a fixed position with respect to operating means 3, in contrast to tube 9 being axially displaceable within tube 11. Because central tube 7 is mounted to operating means 3 in such a manner that its opening 15 is located at inlet 45 of operating means 3, tube 7 is also maintained in a fixed position with respect to operating means 3. By having both tube 7 and tube 11 fixedly or non-movably mounted to the same operating means 3 at their proximal ends (see FIGS. 1 and 6), axial movement is prevented of tube 7 with respect to tube 11. Thus, the connection of tube 11 to tube 7 (by means of their common connection to operating means 3) prevents axial movement of tube 7 with respect to tube 11, thereby preventing the distal end of tube 7 from being urged forward during delivery of stent 33.
Internal clip 59 of claw 57 serves to ensure a two-position indexing function. Sleeve 55 remains in the distal position (FIGS. 7 and 8) as long as the guide-implant or outer tube 9' has not been drawn back beyond the sleeve engaging position, a position which can only be reached by activating the second safety 43. Here clip 59 is positioned in a hole or recess 60 of central tube 7A to hold sleeve 55 in place. It is outer tube 9' which biases spring-like claw 57 into this releasable latching or locking position. A number of radial openings 62 in central tube 7A permit or enable monitoring or inspection of the positioning of the proximal end of the stent during implantation and viewing of the features of the body duct or canal before and after treatment. Additionally, openings 62 allow for an increase of flow of flushing or contrast fluid. FIGS. 9' and 10 show outer tube 9' drawn back to a position where external clip 61 engages hooking zone 63 (a recess or opening) in outer tube 9'. (Central tube 7A might be provided with a track 64 for axially or linearly guiding claw 57.) In going beyond this position, the hooking zone 63 comes alongside external clip 61 located on claw 57 of sleeve 55. Further movement of the outer tube rearwardly will cause sleeve 55 to also move rearwardly and this is shown in FIGS. 11 and 12. As outer tube 9' moves rearwardly, at hooking zone 63 the elastic effect of claw 57 causes the claw internal clip 59 to disengage from recess 60 and external clip 61 to engage outer tube 9' at zone 63. The sleeve 55 is then drawn back together with outer tube 9' until the proximal end of the stent is no longer covered by the sleeve whereupon the stent is released from device 1 for deployment. The stent, due to self-expandable and form-memory effect, disengages from the central tube and expands up against the walls of a canal or body duct to be treated. The device 1 can then be withdrawn from a patient.
Lastly, FIGS. 15 and 16 show yet an additional modification of the proximal stent capturing feature of the invention. Here at the distal end of central tube 7C cuff 71 replaces teeth 63' and surrounds the central tube and, as shown in FIG. 16, the proximal end portion of stent 33 is positioned between cuff 71 and sleeve 55. The cuff grips the stent against the inside of the sleeve. All of the other features of the device are as set forth in FIGS. 7-12.
After introducing the distal end of device 1 into the patient at the desired site or location thereof, as checked by for example an endoscope or telescope, the forward safety catch release member 41 is activated by downward movement thereof thereby releasing the safety catch 47, 51 and the second loop handle 39 with associated outer tube 9 can now be moved backward to release the stent 33 as shown in FIG. 5. During this backward movement of said handle 39, the safety catch 49, 53 arrests the movement before full release of the stent. This is a safety measure and full release is obtained by pressing release member 43. When the second loop handle 39 has reached position A in FIG. 1, the stent 33 will be fully released at the desired location and the device 1 can be retracted leaving the stent 33 inside the urethra.
It is to be noted that the present invention is in no way limited to the embodiments described above. Thus any suitable materials can be used for the different parts of the device and, furthermore, the invention is useful not only with regard to the type of stents described in U.S. Pat. No. 4,655,771, although the device described herein is particularly useful in handling such a stent. As previously noted such self-expanding stents, as disclosed herein, can be implanted in for example blood vessels or other ducts in living animal bodies.
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handles to control relative catheter component movement* Cited by examinerClassifications U.S. Classification606/108, 606/198International ClassificationA61B17/28, A61M3/02, A61B19/00, A61F2/00, A61F2/06, A61F2/84Cooperative ClassificationA61F2002/3008, A61B2017/00902, A61M3/0279, A61B2217/007, A61F2250/0098, A61F2002/9517, A61F2/95, A61B17/29European ClassificationA61F2/95, A61B17/29Legal EventsDateCodeEventDescriptionFeb 18, 2011FPAYFee paymentYear of fee payment: 12Feb 20, 2007FPAYFee paymentYear of fee payment: 8Dec 30, 2002FPAYFee paymentYear of fee payment: 4RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google