US20030065376A1 - Stent body sock - Google Patents

Stent body sock Download PDF

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Publication number
US20030065376A1
US20030065376A1 US09/970,458 US97045801A US2003065376A1 US 20030065376 A1 US20030065376 A1 US 20030065376A1 US 97045801 A US97045801 A US 97045801A US 2003065376 A1 US2003065376 A1 US 2003065376A1
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US
United States
Prior art keywords
stent
retaining sleeve
delivery system
attached
stent delivery
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.)
Abandoned
Application number
US09/970,458
Inventor
Jan Seppala
Fernando DiCaprio
Raed Rizq
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Boston Scientific Scimed Inc
Original Assignee
Boston Scientific Scimed Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Boston Scientific Scimed Inc filed Critical Boston Scientific Scimed Inc
Priority to US09/970,458 priority Critical patent/US20030065376A1/en
Assigned to SCIMED LIFE SYSTEMS, INC. reassignment SCIMED LIFE SYSTEMS, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DICAPRIO, FERNANDO, RIZQ, RAED, SEPPALA, JAN
Publication of US20030065376A1 publication Critical patent/US20030065376A1/en
Application status is Abandoned legal-status Critical

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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/95Instruments specially adapted for placement or removal of stents or stent-grafts
    • A61F2/958Inflatable balloons for placing stents or stent-grafts
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/95Instruments specially adapted for placement or removal of stents or stent-grafts
    • A61F2/958Inflatable balloons for placing stents or stent-grafts
    • A61F2002/9583Means for holding the stent on the balloon, e.g. using protrusions, adhesives or an outer sleeve

Abstract

A stent delivery system which includes a stent delivery catheter, the stent delivery catheter having a stent mounting region, the stent mounting region having an inflatable portion. A stent is disposed about the stent mounting region, the stent having an unexpanded position and an expanded position. At least one stent retaining sleeve is also included having first and second ends, the first end being attached to the stent delivery catheter, the at least one stent retaining sleeve disposed about at least a portion of the stent in the unexpanded position, the stent retaining sleeve being constructed and arranged to retract toward the attached first end when the stent is expanded.

Description

    CROSS-REFERENCE TO RELATED APPLICATIONS
  • Not Applicable [0001]
  • STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH
  • Not Applicable [0002]
  • BACKGROUND OF THE INVENTION
  • It is well understood that stents which are not properly secured or retained to the catheter may slip and either be lost or be deployed in the wrong location or partially deployed. Traditionally, in order to provide proper securement of the stent on the catheter the stent is crimped to a predetermined area of the catheter. [0003]
  • In the past, crimping has been done by hand or by a crimping apparatus, often resulting in the application of undesired uneven forces to the stent. Such a stent must either be discarded or re-crimped. Stents which have been crimped multiple times can suffer from fatigue and may be scored or otherwise marked which can cause thrombosis. A poorly crimped stent can also damage the underlying balloon. [0004]
  • Stents and stent delivery assemblies are utilized in a number of medical procedures and situations, and as such their structure and function are well known. A stent is a generally cylindrical prosthesis introduced via a catheter into a lumen of a body vessel in a configuration having a generally reduced diameter and then expanded to the diameter of the vessel. In its expanded configuration, the stent supports and reinforces the vessel walls while maintaining the vessel in an open, unobstructed condition. [0005]
  • The present invention avoids these problems by providing stent retaining sock(s) or sleeves which are capable of securing a stent to the catheter without the need to crimp the stent into place. The sock(s) may be utilized with nearly any type of stent. Both self-expanding and inflation expandable stents are well known and widely available in a variety of designs and configurations. Self-expanding stents must be maintained under a contained sheath or sock(s) in order to maintain their reduced diameter configuration during delivery of the stent to its deployment site. Inflation expandable stents are crimped to their reduced diameter about the delivery catheter, then maneuvered to the deployment site and expanded to the vessel diameter by fluid inflation of a balloon positioned between the stent and the delivery catheter. The present invention is particularly concerned with delivery and deployment of inflation expandable stents, although it is generally applicable to self-expanding stents when used with balloon catheters. [0006]
  • In advancing an inflation expandable stent through a body vessel to the deployment site, there are a number of important considerations. The stent must be able to securely maintain its axial position on the delivery catheter without translocating proximally or distally and especially without becoming separated from the catheter. The stent, particularly its distal and proximal ends, must be protected to prevent distortion of the stent and to prevent abrasion and/or reduce trauma of the vessel walls. It is also important to prevent stent flaring during bending and tracking of the stent. [0007]
  • In light of the above, it would be desirable to employ a stent covering which functions to help retain the stent on the catheter but which could optionally be left on the catheter during stent delivery so as to avoid damaging the stent or causing undesirable movement of the stent during sheath retraction. It would be desirable to provide for a covering which is flexible and which sufficiently covers a stent so as to prevent stent elements from protruding outward from the catheter and interfering with a vessel wall prior to delivery. It would also be desirable to provide a covering which does not increase the profile of the stent delivery catheter beyond its profile without the covering. [0008]
  • Inflation expandable stent delivery and deployment assemblies are known which utilize restraining means that overlie the stent during delivery. U.S. Pat. No. 4,950,227 to Savin et al., relates to an inflation expandable stent delivery system in which a sleeve overlaps the distal or proximal margin (or both) of the stent during delivery. During inflation of the stent at the deployment site, the stent margins are freed of the protective sleeve(s). U.S. Pat. No. 5,403,341 to Solar, relates to a stent delivery and deployment assembly which uses retaining sheaths positioned about opposite ends of the compressed stent. The retaining sheaths of Solar are adapted to tear under pressure as the stent is radially expanded, thus releasing the stent from engagement with the sheaths. U.S. Pat. No. 5,108,416 to Ryan et al., describes a stent introducer system which uses one or two flexible end caps and an annular socket surrounding the balloon to position the stent during introduction to the deployment site. [0009]
  • Other patents which describe socks or sleeves, and material used therefor, include Blaeser et al. U.S. Pat. No. 5,944,726 issued Aug. 31, 1999; Dusbabek et al. U.S. Pat. No. 5,968,069, issued Oct. 19, 1999; and Cornelius et al., U.S. Pat. No. 6,068,634, issued May 30, 2000. In addition, co-pending applications, Ser. Nos. 08/701,979; 08/702,149; 09/273,520; 09/549,286; 09/552,807; 09/668,496; 09/664,267, and 09/664,268 all relate to stent retaining sleeves or socks. [0010]
  • All US patents, applications and all other published documents mentioned anywhere in this application are incorporated herein by reference in their entirety. [0011]
  • BRIEF SUMMARY OF THE INVENTION
  • This invention provides an improvement over the prior art, by providing a stent delivery system which includes one or more stent retaining sleeves or socks which are constructed and arranged to retract off of the stent when the stent is expanded. The sleeves of the present invention are capable of retaining and immobilizing a non-crimped or crimped stent on the catheter surface by completely covering all or only a portion of the stent, the sleeves are readily retracted from off of the stent to provide for safe and effective stent release. [0012]
  • The invention may utilize a single sock or sleeve which either retracts proximally or distally, or two sleeves which each cover one end of the stent and retract axially away from each other. The socks or sleeves may be ribbed or accordion; have holes or perforations or be made of two or more materials to construct one or two socks which retract off of the stent when the stent is expanded, as disclosed in the incorporated co-pending applications set forth above. The sleeve or sleeves may be composed of an elastic polymer, a non-elastic polymer or a combination thereof.[0013]
  • BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
  • A detailed description of the invention is hereafter described with specific reference being made to the drawings in which: [0014]
  • FIG. 1 is a side view of the stent delivery system showing a single sleeve attached proximally of the stent; [0015]
  • FIG. 2 is a side view of the stent delivery system showing a single sleeve attached distally of the stent; [0016]
  • FIG. 3 is a side view of the stent delivery system showing both a proximal and distal socks, each attached on the proximal and distal sides of the stent, respectively; [0017]
  • FIG. 4 is a side view of the embodiment of FIG. 3 with ribbed socks; [0018]
  • FIG. 5 is a side view of a perforated sock, and FIG. 6 is a side view of a striped sock.[0019]
  • DETAILED DESCRIPTION OF THE INVENTION
  • While this invention may be embodied in many different forms, there are shown in the drawings and described in detail herein specific preferred embodiments of the invention. The present disclosure is an exemplification of the principles of the invention and is not intended to limit the invention to the particular embodiments illustrated. [0020]
  • FIG. 1 shows a first embodiment of a stent delivery system, indicated generally at [0021] 10, which includes a stent 12 mounted upon a stent delivery catheter 14. FIG. 1 shows the stent delivery system prior to stent delivery. The stent delivery catheter 14 includes a catheter shaft 16 with and inflatable portion or balloon 18. A stent retaining sleeve 20 is engaged at a proximal portion 22 of the catheter shaft 16 adjacent to the balloon 18. The sleeve 20 extends distally over the stent 12 when in the unexpanded position. When the balloon 18 is expanded and the stent 12 expands from the unexpanded state to the expanded state, the sleeve 20 will be retracted proximally off of the stent 12 thereby allowing the stent to deploy.
  • FIG. 2, on the other hand, depicts the stent delivery system [0022] 10 having a sleeve 20 secured to a distal portion 24 of the catheter shaft 16. In the embodiment shown in FIG. 2, the sleeve 20 is retracted distally when the stent 12 is expanded from the unexpanded state to the expanded state.
  • FIG. 3, shows an embodiment wherein the stent delivery system employs a pair of sleeves [0023] 20. One of the sleeves 20 is engaged at the proximal portion 22 and one sleeve 20 is engaged to the distal portion 24. Unlike many prior cases, the present sleeves are constructed to cover not only the very ends of the stent 12, but as shown they may have sufficient length to overlay the entire stent or significant portions thereof. Alternatively, the sleeves 20 may be configured to overlap one another.
  • In FIG. 4 an alternative embodiment of the system [0024] 10 shown in FIG. 3 is shown. As illustrated in FIG. 4, the sleeves 20 may be provided with an corrugated or ribbed configuration. Such a ribbed configuration may be used for sleeve(s) 20 as shown in FIGS. 1-3 to provide the sleeve with the desired characteristics discussed above.
  • In FIG. 5 another alternative embodiment is shown. In FIG. 5, it may be seen that the sleeve [0025] 20 is equipped with a plurality of holes 28. The holes 28 may be provided to the sleeves 20 illustrated in FIGS. 1-3 to provide the sleeves 20 with the ability to retract off of the stent as desired.
  • In FIG. 6 yet another alternative embodiment is shown, wherein the sleeve is composed of a combination of a first material [0026] 30 and at least one additional material 32. As illustrated the materials 30 and 32 may be configured in the sleeve 20 to provide a stripped configuration. Such a sleeve may be used in any of the embodiments shown in FIGS. 1-3. In addition to being directed to the embodiments described above and claimed below, the present invention is further directed to embodiments having different combinations of the features described above and claimed below. As such, the invention is also directed to other embodiments having any other possible combination of the dependent features claimed below.
  • The above examples and disclosure are intended to be illustrative and not exhaustive. These examples and description will suggest many variations and alternatives to one of ordinary skill in this art. All these alternatives and variations are intended to be included within the scope of the attached claims. Those familiar with the art may recognize other equivalents to the specific embodiments described herein which equivalents are also intended to be encompassed by the claims attached hereto. [0027]

Claims (10)

1. A stent delivery system comprising:
a stent delivery catheter, the stent delivery catheter having a stent mounting region, the stent mounting region having an inflatable portion;
a stent disposed about the stent mounting region, the stent having an unexpanded position and an expanded position;
at least one stent retaining sleeve having first and second ends, the first end being attached to the stent delivery catheter, the at least one stent retaining sleeve disposed about at least a portion of the stent in the unexpanded position, the stent retaining sleeve being constructed and arranged to retract toward the attached first end when the stent is expanded.
2. The stent delivery system of claim 1 wherein the at least one stent retaining sleeve is ribbed.
3. The stent delivery system of claim 1 wherein the at least one stent retaining sleeve is pleated.
4. The stent delivery system of claim 1 wherein the at least one stent retaining sleeve has a plurality of openings.
5. The stent delivery system of claim 1 wherein the at least one stent retaining sleeve is comprised of at least two materials.
6. The stent delivery system of claim 5 wherein the at least one stent retaining sleeve is comprised of alternating strips of the at least two materials.
7. The stent delivery system of claim 1 wherein the first end is attached proximally of the stent.
8. The stent delivery system of claim 1 wherein the first end is attached distally of the stent.
9. The stent delivery system of claim 1 wherein the at least one stent retaining sleeve comprises proximal and distal stent retaining sleeves, each having first and second ends, the first end of the proximal stent retaining sleeve being attached to the stent delivery catheter proximally of the stent and the first end of the distal stent retaining sleeve being attached to the stent delivery catheter distally of the stent.
10. The stent delivery system of claim 9 wherein the proximal and distal stent retaining sleeves overlap.
US09/970,458 2001-10-02 2001-10-02 Stent body sock Abandoned US20030065376A1 (en)

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US09/970,458 US20030065376A1 (en) 2001-10-02 2001-10-02 Stent body sock

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US09/970,458 US20030065376A1 (en) 2001-10-02 2001-10-02 Stent body sock
US11/181,533 US8206431B2 (en) 2000-10-05 2005-07-14 Stent body sock

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US11/181,533 Active 2026-02-18 US8206431B2 (en) 2000-10-05 2005-07-14 Stent body sock

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060015171A1 (en) * 2004-07-16 2006-01-19 Armstrong Joseph R Deployment system for intraluminal devices
US20060079955A1 (en) * 2004-10-07 2006-04-13 Scimed Life Systems, Inc. Non-shortening helical stent
US20070016280A1 (en) * 2005-07-14 2007-01-18 Cappella, Inc. Delivery System And Method Of Use For Deployment Of Self-Expandable Vascular Device

Families Citing this family (10)

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CA2604081C (en) 2005-05-25 2013-11-26 Chestnut Medical Technologies, Inc. System and method for delivering and deploying a self-expanding device within a vessel
US8267985B2 (en) 2005-05-25 2012-09-18 Tyco Healthcare Group Lp System and method for delivering and deploying an occluding device within a vessel
US8273101B2 (en) 2005-05-25 2012-09-25 Tyco Healthcare Group Lp System and method for delivering and deploying an occluding device within a vessel
AU2008250552B2 (en) 2007-05-15 2012-03-08 Jenavalve Technology Inc. Handle for manipulating a catheter tip, catheter system and medical insertion system for inserting a self-expandable heart valve stent
US9138315B2 (en) * 2007-04-13 2015-09-22 Jenavalve Technology Gmbh Medical device for treating a heart valve insufficiency or stenosis
EP2254527A1 (en) * 2008-03-27 2010-12-01 NFocus Neuromedical, Inc. Friction-release distal latch implant delivery system and components
DE102008021066A1 (en) * 2008-04-26 2009-10-29 Biotronik Vi Patent Ag Stent fixation system
US9675482B2 (en) 2008-05-13 2017-06-13 Covidien Lp Braid implant delivery systems
US20120071912A1 (en) * 2010-09-17 2012-03-22 Campbell Carey V Expandable medical devices
US9155647B2 (en) 2012-07-18 2015-10-13 Covidien Lp Methods and apparatus for luminal stenting

Citations (9)

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US4950227A (en) * 1988-11-07 1990-08-21 Boston Scientific Corporation Stent delivery system
US5108416A (en) * 1990-02-13 1992-04-28 C. R. Bard, Inc. Stent introducer system
US5403341A (en) * 1994-01-24 1995-04-04 Solar; Ronald J. Parallel flow endovascular stent and deployment apparatus therefore
US5919170A (en) * 1993-02-01 1999-07-06 Mentor Corporation Urinary catheter
US5944726A (en) * 1996-08-23 1999-08-31 Scimed Life Systems, Inc. Stent delivery system having stent securement means
US5968069A (en) * 1996-08-23 1999-10-19 Scimed Life Systems, Inc. Stent delivery system having stent securement apparatus
US5980530A (en) * 1996-08-23 1999-11-09 Scimed Life Systems Inc Stent delivery system
US6221097B1 (en) * 1999-03-22 2001-04-24 Scimed Life System, Inc. Lubricated sleeve material for stent delivery
US6387118B1 (en) * 2000-04-20 2002-05-14 Scimed Life Systems, Inc. Non-crimped stent delivery system

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US5445646A (en) * 1993-10-22 1995-08-29 Scimed Lifesystems, Inc. Single layer hydraulic sheath stent delivery apparatus and method
US5534007A (en) * 1995-05-18 1996-07-09 Scimed Life Systems, Inc. Stent deployment catheter with collapsible sheath
US6395008B1 (en) 1996-08-23 2002-05-28 Scimed Life Systems, Inc. Stent delivery device using stent cups and mounting collars
US5980565A (en) * 1997-10-20 1999-11-09 Iowa-India Investments Company Limited Sandwich stent
US6306163B1 (en) * 1998-08-04 2001-10-23 Advanced Cardiovascular Systems, Inc. Assembly for collecting emboli and method of use
US6964676B1 (en) 2000-04-14 2005-11-15 Scimed Life Systems, Inc. Stent securement system
US6432130B1 (en) 2000-04-20 2002-08-13 Scimed Life Systems, Inc. Fully sheathed balloon expandable stent delivery system
US6607552B1 (en) 2000-09-18 2003-08-19 Scimed Life Systems, Inc. Rolling socks
US6565595B1 (en) 2000-09-18 2003-05-20 Scimed Life Systems, Inc. Two component sleeves
US6554841B1 (en) 2000-09-22 2003-04-29 Scimed Life Systems, Inc. Striped sleeve for stent delivery

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4950227A (en) * 1988-11-07 1990-08-21 Boston Scientific Corporation Stent delivery system
US5108416A (en) * 1990-02-13 1992-04-28 C. R. Bard, Inc. Stent introducer system
US5919170A (en) * 1993-02-01 1999-07-06 Mentor Corporation Urinary catheter
US5403341A (en) * 1994-01-24 1995-04-04 Solar; Ronald J. Parallel flow endovascular stent and deployment apparatus therefore
US5944726A (en) * 1996-08-23 1999-08-31 Scimed Life Systems, Inc. Stent delivery system having stent securement means
US5968069A (en) * 1996-08-23 1999-10-19 Scimed Life Systems, Inc. Stent delivery system having stent securement apparatus
US5980530A (en) * 1996-08-23 1999-11-09 Scimed Life Systems Inc Stent delivery system
US6068634A (en) * 1996-08-23 2000-05-30 Scimed Life Systems, Inc. Stent delivery system
US6221097B1 (en) * 1999-03-22 2001-04-24 Scimed Life System, Inc. Lubricated sleeve material for stent delivery
US6387118B1 (en) * 2000-04-20 2002-05-14 Scimed Life Systems, Inc. Non-crimped stent delivery system

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060015171A1 (en) * 2004-07-16 2006-01-19 Armstrong Joseph R Deployment system for intraluminal devices
WO2006019626A3 (en) * 2004-07-16 2008-01-03 Gore Enterprise Holdings Inc Deployment system for intraluminal devices
AU2005275353B2 (en) * 2004-07-16 2010-03-04 W. L. Gore & Associates, Inc. Deployment system for intraluminal devices
US8308789B2 (en) * 2004-07-16 2012-11-13 W. L. Gore & Associates, Inc. Deployment system for intraluminal devices
US20060079955A1 (en) * 2004-10-07 2006-04-13 Scimed Life Systems, Inc. Non-shortening helical stent
US7914570B2 (en) 2004-10-07 2011-03-29 Boston Scientific Scimed, Inc. Non-shortening helical stent
US20070016280A1 (en) * 2005-07-14 2007-01-18 Cappella, Inc. Delivery System And Method Of Use For Deployment Of Self-Expandable Vascular Device

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US20050251243A1 (en) 2005-11-10
US8206431B2 (en) 2012-06-26

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AS Assignment

Owner name: SCIMED LIFE SYSTEMS, INC., MINNESOTA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SEPPALA, JAN;RIZQ, RAED;DICAPRIO, FERNANDO;REEL/FRAME:012562/0066;SIGNING DATES FROM 20011212 TO 20011219

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION