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Numéro de publicationUS20010007947 A1
Type de publicationDemande
Numéro de demandeUS 09/769,312
Date de publication12 juil. 2001
Date de dépôt26 janv. 2001
Date de priorité22 oct. 1999
Autre référence de publicationUS6340364
Numéro de publication09769312, 769312, US 2001/0007947 A1, US 2001/007947 A1, US 20010007947 A1, US 20010007947A1, US 2001007947 A1, US 2001007947A1, US-A1-20010007947, US-A1-2001007947, US2001/0007947A1, US2001/007947A1, US20010007947 A1, US20010007947A1, US2001007947 A1, US2001007947A1
InventeursNozomu Kanesaka
Cessionnaire d'origineNozomu Kanesaka
Exporter la citationBiBTeX, EndNote, RefMan
Liens externes: USPTO, Cession USPTO, Espacenet
Vascular filtering device
US 20010007947 A1
Résumé
A vascular filtering device is formed of a flexible shaft having a passageway extending inside the shaft, an inflatable member communicating with the passageway and having a spiral form, and a filter member fixed to the distal end portion of the shaft. The inflatable member is attached at an inner side thereof to a distal end portion of the shaft. The filter member is attached to the shaft and fixed onto the outer side surface of the inflatable member along the entire length thereof. When the inflatable member is inflated, the filter member is enlarged to allow a blood containing debris or blood clots to flow through the filter member. Thus, the debris or blood clots are captured by the filter member. When the inflatable member is deflated, the filter member is disposed close to the side surface of the shaft. Thus, the filter member with the debris or clots can be easily removed from the blood vessel.
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Revendications(5)
What is claimed is:
1. A vascular filtering device, comprising:
a flexible shaft having a side surface, a passageway extending inside the flexible shaft, and a side opening formed in the side surface at a distal end portion of the shaft and communicating with the passageway,
an inflatable member having a spiral form and attached to the distal end portion of the shaft to communicate with the passageway through the side opening of the shaft, said inflatable member having an outer side surface, and an inner side surface entirely fixed to the side wall of the shaft, and
a filter member having a distal end sealingly fixed to the distal end portion of the shaft and an open end at a side opposite to the distal end thereof, said filter member extending along the flexible shaft and fixed onto the outer side surface of the inflatable member along an entire length thereof so that when the inflatable member is inflated, the filter member is enlarged to allow a foreign substance to enter into the filter member through the open end, and when the inflatable member is deflated, the filter member is disposed close to the side surface of the shaft.
2. A vascular filtering device according to
claim 1
, wherein said shaft is a guide shaft for allowing a vascular treatment device to be transferred in a blood vessel.
3. A vascular filtering device according to
claim 1
, wherein said filter member has a bag shape opening toward a proximal end portion of the shaft.
4. A vascular filtering device according to
claim 1
, wherein said inflatable member has a tubular shape with a hollow portion therein extending substantially throughout an entire length thereof, said hollow portion having a diameter gradually enlarging from the distal end of the shaft.
5. A vascular filtering device according to
claim 1
, wherein said shaft includes a partition wall therein, and a port in the side wall near the partition wall, said partition wall dividing the passageway into a first passageway extending from a proximal end portion of the shaft to the opening to communicate with the inflatable member, and a second passageway extending from the port to a distal end of the shaft to allow a guide wire to pass therethrough.
Description
    CROSS REFERENCE TO RELATED APPLICATION
  • [0001]
    This is a continuation in part application of Ser. No. 09/425,218 filed on Oct. 22, 1999.
  • BACKGROUND OF THE INVENTION AND RELATED ART STATEMENT
  • [0002]
    The present invention relates to a device for capturing a debris or blood clots in a blood vessel, and more particularly, it relates to a vascular filtering device for capturing and removing the debris or blood clots used in, e.g. percutaneous transluminal coronary angioplasty (PTCA) procedure.
  • [0003]
    In recent years, an inter-vascular treatment, such as PTCA, has been widely practiced for a treatment of stenosis in the artery. In the PTCA procedure, a catheter which is provided with a balloon at a distal end thereof is inserted into a blood vessel which has a stenosis, and the balloon is inflated to enlarge the stenosis. Also, after enlarging the stenosis, a stent may be provided for preventing re-stenosis.
  • [0004]
    In performing the PTCA procedure, however, it may cause other problems. Namely, debris or blood clots formed at the stenosis may be separated from the portion at the stenosis and migrate to other critical area, such as brain and pulmonary arteries, while the PTCA procedure is being performed.
  • [0005]
    In order to remove the debris or blood clots while the PTCA procedure is being performed, a device having a mesh or net may be disposed in the blood vessel, as proposed in U.S. Pat. No. 6,001,118. The net is inflated by various inflating means to catch emboli, but the net with the emboli may not be smoothly removed from the blood vessel after use.
  • [0006]
    The present invention has been made in view of the above problem, and an object of the invention is to provide a vascular filtering device for removing debris or blood clots in the blood vessel of a patient during an operation, such as balloon dilation procedure.
  • [0007]
    Another object of the invention is to provide a vascular filtering device as stated above, which can be easily delivered to a desired location in the blood vessel and removed therefrom after capturing the debris or blood clots.
  • [0008]
    A further object of the invention is to provide a vascular filtering device as stated above, which is formed easily and is used as a guide wire or tube for other procedure.
  • [0009]
    Further objects and advantages of the invention will be apparent from the following description of the invention.
  • SUMMARY OF THE INVENTION
  • [0010]
    A vascular filtering device of the invention is basically formed of a flexible shaft, an inflatable member attached to the shaft, and a filter member attached to the inflatable member and the shaft.
  • [0011]
    The flexible shaft has a side surface, a passageway extending inside the flexible shaft, and a side opening formed in the side wall at a distal end portion of the shaft to communicate with the passageway. A fluid may be supplied to the passageway from a proximal end of the shaft.
  • [0012]
    The inflatable member has a spiral or helical form and is attached to the distal end portion of the shaft to communicate with the passageway through the side opening of the shaft. The inflatable member has an outer side surface, and an inner side surface entirely fixed to the side wall of the shaft not to be separated therefrom.
  • [0013]
    The filter member has a distal end sealingly fixed to the distal end portion of the shaft and an open end at a side opposite to the distal end. The filter member extends along the flexible shaft to cover the distal end portion thereof and is fixed onto the outer side surface of the inflatable member along an entire length thereof. Thus, when the inflatable member is inflated by providing the liquid to the inflatable member through the passageway, the filter member is enlarged to allow a foreign substance, such as blood clots and debris, to enter into the filter member through the open end to capture the same. When the inflatable member is deflated by forcibly removing the liquid from the inflatable member, the filter member with the blood clots and debris is closed or disposed close to the side surface of the shaft. Thus, the filtering device can be easily removed from the blood vessel.
  • [0014]
    When the filtering device of the invention is used, the inflatable member is made in a fully deflated condition. The distal end portion of the shaft is inserted into a blood vessel from a portion used in a regular PTCA procedure, and the shaft is advanced to a desired location in the blood vessel passing through a portion to be treated later. Then, a liquid is supplied to the inflatable member through the passageway to thereby inflate the inflatable member. Accordingly, the proximal end of the filter member is opened and is held between an inner wall of the blood vessel and the inflatable member. Blood in the blood vessel flows along the inflatable member and passes through the filter member to remove a foreign substance, such as debris and blood clots.
  • [0015]
    In this condition, since the filter and the inflatable member do not block the blood flow in the blood vessel, a required PTCA procedure can be made smoothly. If debris or blood clots is formed by the PTCA procedure and flows in the blood vessel, the debris or blood clots can be captures by the filter member.
  • [0016]
    After the PTCA procedure is finished, the inflatable member is deflated by forcibly removing the liquid in the inflatable member. Then, the filter member with the debris blood clots is removed from the blood vessel together with the shaft.
  • [0017]
    In the invention, since the inflatable member is attached to both shaft and filter member along the entire inner and outer portions, when the inflatable member is inflated, the filter member can surely abuts against the inner wall of the blood vessel. When the inflatable member is forcibly deflated, the filter member is disposed close to the outer surface of the shaft with the debris or blood clots therein. Thus, the shaft with the inflatable member and the filter member can be easily removed from the blood vessel. The debris or blood clots is removed smoothly together with the filter member.
  • [0018]
    Preferably, the shaft of the filtering device is used as a guide shaft for allowing a vascular treatment device to be transferred in a blood vessel, resulting in that the guide shaft has the filtering member for capturing a foreign substance formed in the vascular treatment procedure.
  • [0019]
    In the invention, the filtering device may be transferred in the blood vessel through a guide wire. In this case, the shaft includes a partition wall in the passageway, and a port in the side wall near the partition wall. The partition wall divides the passageway into a first passageway extending from the proximal end portion of the shaft to the opening to communicate with the inflatable member, and a second passageway extending from the port to the distal end of the shaft to allow the guide wire to pass therethrough. The filtering device can be transferred to a desired location easily and rapidly through the guide wire already disposed in the blood vessel, as in the balloon catheter system.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • [0020]
    [0020]FIG. 1 is an explanatory view showing a first embodiment of a vascular filtering device of the invention placed in a blood vessel; and
  • [0021]
    [0021]FIG. 2 is an explanatory view showing a second embodiment of a vascular filtering device of the invention placed in a blood vessel.
  • DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
  • [0022]
    Hereinafter, embodiments of a vascular filtering device of the present invention will be explained with reference to the attached drawings.
  • [0023]
    As shown in FIG. 1, a first embodiment of the vascular filtering device 1 is formed of a flexible shaft 2 having a passageway 3 therein, a tube-like balloon or inflatable member 4 helically wound around a distal end portion of the shaft 2, and a filter 5 in a substantially conical shape having a distal end 7 attached to the distal end of the shaft 2.
  • [0024]
    The shaft 2 may be made of metal or plastics, and has an elongated shape with flexibility to be inserted into a blood vessel, as in a regular PTCA device. In the first embodiment, the shaft 2 is used as a guide wire for a PTCA procedure.
  • [0025]
    The passageway 3 of the shaft 2 has an open end (not shown) at a proximal end of the shaft 2, and is closed at a distal end 6. The shaft 2 has an opening 8 on the side wall at the distal end portion of the shaft to communicate with an interior of the balloon 4 for inflating and deflating the balloon 4.
  • [0026]
    The balloon 4 is hollow and is spirally or helically wound around the shaft 2 from a front end 9 at the distal end 6 of the shaft 2 to a rear end 10 thereof. The diameter of the balloon 4 is gradually enlarged from the front end 9 to the rear end 10. Also, the balloon 4 is entirely fixed to the outer surface of the shaft 2 at the inner side thereof along the entire length of the balloon 4. There is no space between the balloon 4 and the shaft 2. Therefore, the distance from the outer side of the balloon to the outer surface of the shaft 2 gradually increases from the front end 9 to the rear end 10.
  • [0027]
    The rear end 10 of the balloon 4 is sealingly connected to the opening 8 of the shaft 2, so that the passageway 3 communicates with the interior of the balloon 4. The front end 9 may also be communicated with the passageway 3.
  • [0028]
    Incidentally, the vascular filtering device 1 shown in FIG. 1 is in a condition that the balloon 4 is inflated in the blood vessel.
  • [0029]
    The filter 5 shown in section in FIG. 1 surrounds the helically wound balloon 4, and is fixed to the entire outside surface of the balloon 4. Therefore, when the balloon 4 is inflated, the filter 5 mounted on the balloon 4 is expanded to form the conical shape as shown in FIG. 1. Also, when the balloon 4 is deflated, the filter 5 attached to the balloon 4 is disposed close to the outer surface of the shaft 2.
  • [0030]
    A bottom or enlarged portion of the conical shape filter 5 is opened to have an opening 11 shown in the figure, and a periphery of the opening 8 is partly attached to the balloon 4. The filter 5 has a thickness of about 0.254 mm (0.001 inch) to 0.508 mm (0.002 inch), and includes numerous pores for allowing liquid, such as blood, to pass therethrough. The diameter of each pore is approximately 6 μm such that certain undesired substances, such as debris or blood clots, can not pass through the pores of the filter 5 while red and white blood corpuscles and so on can pass therethrough.
  • [0031]
    In use, the vascular filtering device 1 structured as described above is prepared such that the balloon 4 and the filter 5 are collapsed. In this condition, the filtering device 1 is entered into a blood vessel, e.g. vein of a foot, similar to installing a guide wire into the blood vessel. The shaft is advanced, and the balloon 4 at the distal end portion of the shaft 2 passes through a treatment portion, e.g. stenosis, by a PTCA procedure later operated. Then, a liquid is supplied to the balloon 4 through the passageway 3 to inflate the balloon 4 to set the shaft. As a result, the filter 5 is opened and is held between an inner wall of a blood vessel 12 and the balloon 4. Thus, the filter 5 is set at a downstream of the blood vessel 12 relative to the treatment portion. In this condition, since the blood flows along the path around the balloon 4 and passes through the filter 5, this condition is kept until the required operation, e.g. PTCA procedure for opening stenosis and installing a stent, is completed.
  • [0032]
    In case debris or blood clots 13 occurs at the upstream side of the blood vessel 12 during the PTCA procedure, blood containing the debris or blood clots 13 flows to the downstream of the blood vessel 12 in a direction shown by arrows in FIG. 1. Blood containing debris or blood clots 13 flows into the opening 11 of the filter 5, and flows along the helical path of the balloon 4. Blood passes through the pores of the filter 5, while the debris or blood clots 13 is caught inside the conical shaped filter 5 since they can not pass through the pores of the filter 5.
  • [0033]
    After the PTCA procedure is completed, the balloon 4 is deflated to collapse the filter 5 containing the debris or blood clots 13 therein by forcibly removing the liquid inside the balloon 4. Since the filter 5 is fixed to the outer surface of the balloon 4, when the balloon 4 is deflated, the filter 5 is also collapsed and disposed close to the shaft 2 while the debris or blood clots 13 are held between the filter and the shaft 2. Then, the vascular filtering device 1 is removed from the blood vessel 12 by pulling the vascular filtering device 1 in a direction opposite to the direction of the blood flow. Accordingly, the debris or blood clots 13 formed at the PTCA procedure can be removed from the blood vessel 12.
  • [0034]
    In the invention, when the balloon 4 is deflated, the filter 5 is collapsed to be located close to the outer surface of the shaft 2. Therefore, although the debris or blood clots 13 is caught by the filter 5, the size of the filter 5 is made small. Thus, the filtering device 1 of the invention can be removed from the blood vessel 12 smoothly.
  • [0035]
    [0035]FIG. 2 shows a second embodiment of the vascular filtering device 1′ of the invention. The vascular filtering device 1′ is designed to be delivered to the proper position in the blood vessel through a guide wire 14 already placed in the blood vessel, and has a rapid exchange system.
  • [0036]
    Namely, in the filtering device 1′, a shaft 2′ has a partition wall 15 therein to divide a passageway into an inflation passageway 3′ for inflating a balloon 4′ and a guidewire passageway 16. Also, a guidewire port 17 is provided near the partition wall 15 of the shaft, and the shaft 2′ has an opening 6′ at a distal end thereof. The guide wire 14 can pass through the guidewire port 17, the passageway 15 and the opening 6′. In the vascular filtering device 1′, the balloon 4′ has an elongated spiral shape slightly shorter than that of the balloon 4, and is communicated with the passageway 3′ at one portion.
  • [0037]
    In use, an end of the guide wire 14 is inserted into the passageway 15, and the vascular filtering device 1′ is pushed into the blood vessel 12 along the guide wire 14. After the filtering device 1′ is disposed in the proper position, the balloon 4′ is inflated to open and set the filter 5. Then, the required operation is carried out, and if debris or blood clots 13 is formed, it is captured by the filter 5. In this embodiment, in case the vascular filtering device 1′ is to be exchanged, the vascular filtering device 1′ can be removed from the blood vessel 12 over the guide wire 14 while the guide wire 14 is left in the blood vessel 12. Thereafter, another vascular filtering device 1′ can be introduced in the blood vessel 12 over the guide wire 14.
  • [0038]
    According to the present invention, since the vascular filtering device having a filter at a distal end portion thereof can be placed in the downstream of the blood vessel while a PTCA procedure is operated in an upstream of the blood vessel, even if blood containing blood clots or debris due to PTCA procedure flows to the downstream of the blood vessel, the blood clots or debris can be captured and removed by the vascular filtering device without blocking the blood flow. Thus, the debris or blood clots can be prevented from migrating to the critical area, such as brain and pulmonary arteries, during and after the PTCA procedure.
  • [0039]
    In the invention, since the balloon is firmly fixed to the shaft and the filter at the inner and outer portions thereof, the filter can be surely located in the blood vessel in use, and also, the filter with the debris or blood clots can be made compact on the shaft to be easily removed from the blood vessel.
  • [0040]
    While the invention has been explained with reference to the specific embodiments of the invention, the explanation is illustrative and the invention is limited only by the appended claims.
Référencé par
Brevet citant Date de dépôt Date de publication Déposant Titre
US766216521 mai 200316 févr. 2010Salviac LimitedEmbolic protection device
US776693411 juil. 20063 août 2010Cook IncorporatedEmbolic protection device with an integral basket and bag
US777145210 août 2010Cook IncorporatedEmbolic protection device with a filter bag that disengages from a basket
US778069324 août 2010Salviac LimitedCatheter
US778069731 janv. 200724 août 2010Salviac LimitedEmbolic protection system
US778534221 mai 200331 août 2010Salviac LimitedEmbolic protection device
US779905127 juin 200521 sept. 2010Salviac LimitedSupport frame for an embolic protection device
US783324216 nov. 2010Salviac LimitedEmbolic protection device
US783770123 nov. 2010Salviac LimitedEmbolic protection device
US784206330 nov. 2010Salviac LimitedEmbolic protection device
US784206630 nov. 2010Salviac LimitedEmbolic protection system
US784617631 janv. 20077 déc. 2010Salviac LimitedEmbolic protection system
US785070814 déc. 2010Cook IncorporatedEmbolic protection device having a reticulated body with staggered struts
US786724726 févr. 201011 janv. 2011Cook IncorporatedMethods for embolic protection during treatment of a stenotic lesion in a body vessel
US79014268 mars 2011Salviac LimitedEmbolic protection device
US79014278 mars 2011Salviac LimitedFilter element with retractable guidewire tip
US792734913 juin 200719 avr. 2011Salviac LimitedSupport frame for an embolic protection device
US79723524 nov. 20045 juil. 2011Salviac LimitedEmbolic protection system
US800279027 juin 200523 août 2011Salviac LimitedSupport frame for an embolic protection device
US80527168 nov. 2011Salviac LimitedEmbolic protection system
US805750415 nov. 2011Salviac LimitedEmbolic protection device
US810996219 juin 20067 févr. 2012Cook Medical Technologies LlcRetrievable device having a reticulation portion with staggered struts
US811411513 juin 200714 févr. 2012Salviac LimitedSupport frame for an embolic protection device
US81237761 juin 200528 févr. 2012Salviac LimitedEmbolic protection system
US815283116 nov. 200610 avr. 2012Cook Medical Technologies LlcFoam embolic protection device
US818250822 mai 2012Cook Medical Technologies LlcEmbolic protection device
US818729829 mai 2012Cook Medical Technologies LlcEmbolic protection device having inflatable frame
US82162692 nov. 200610 juil. 2012Cook Medical Technologies LlcEmbolic protection device having reduced profile
US821627010 juil. 2012Salviac LimitedEmbolic protection device
US822144617 juil. 2012Cook Medical TechnologiesEmbolic protection device
US822144813 juin 200717 juil. 2012Salviac LimitedEmbolic protection device
US822667813 juin 200724 juil. 2012Salviac LimitedEmbolic protection device
US824131920 août 200714 août 2012Salviac LimitedEmbolic protection system
US825201728 août 2012Cook Medical Technologies LlcInvertible filter for embolic protection
US825201814 sept. 200728 août 2012Cook Medical Technologies LlcHelical embolic protection device
US83288427 févr. 201111 déc. 2012Salviac LimitedFilter element with retractable guidewire tip
US837709219 févr. 2013Cook Medical Technologies LlcEmbolic protection device
US83886445 mars 2013Cook Medical Technologies LlcEmbolic protection device and method of use
US841974816 avr. 2013Cook Medical Technologies LlcHelical thrombus removal device
US843090113 juin 200730 avr. 2013Salviac LimitedEmbolic protection device
US860313113 déc. 200610 déc. 2013Salviac LimitedEmbolic protection device
US86325622 oct. 200621 janv. 2014Cook Medical Technologies LlcEmbolic protection device
US86578495 févr. 201325 févr. 2014Cook Medical Technologies LlcEmbolic protection device and method of use
US87953156 oct. 20055 août 2014Cook Medical Technologies LlcEmboli capturing device having a coil and method for capturing emboli
US884567723 déc. 201130 sept. 2014Cook Medical Technologies LlcRetrievable device having a reticulation portion with staggered struts
US885222615 juil. 20117 oct. 2014Salviac LimitedVascular device for use during an interventional procedure
US894516914 mars 20063 févr. 2015Cook Medical Technologies LlcEmbolic protection device
US913830714 sept. 200722 sept. 2015Cook Medical Technologies LlcExpandable device for treatment of a stricture in a body vessel
US92953939 nov. 201229 mars 2016Elwha LlcEmbolism deflector
US93017642 juil. 20045 avr. 2016Cook Medical Technologies LlcOccluding device and method of occluding fluid flow through a body vessel
US20030093106 *27 juin 200215 mai 2003Eamon BradyCatheter
US20030109886 *27 juin 200212 juin 2003Martin KeeganCatheter
US20030125751 *27 juin 20023 juil. 2003Patrick GriffinCatheter
US20050004598 *2 juil. 20046 janv. 2005Cook IncorporatedOccluding device and method of occluding fluid flow through a body vessel
US20050027345 *17 févr. 20043 févr. 2005Steven HoranStent delivery and deployment system
US20080262506 *20 août 200723 oct. 2008Salviac LimitedCatheter
DE102009052002B4 *5 nov. 200927 sept. 2012Acandis Gmbh & Co. KgMedizinische Vorrichtung zum Rekanalisieren von Körperhohlräumen und Set umfassend eine derartige Vorrichtung
EP2241284A115 avr. 200920 oct. 2010National University of Ireland, GalwayIntravasculature devices and balloons for use therewith
WO2010119110A115 avr. 201021 oct. 2010National University Of Ireland, GalwayIntravasculature devices and balloons for use therewith
WO2014158816A1 *4 mars 20142 oct. 2014Bayer Medical Care Inc.Catheter system with balloon-operated filter sheath and fluid flow maintenance
Classifications
Classification aux États-Unis606/200, 606/198
Classification internationaleA61F2/06, A61B17/22, A61F2/01, A61F2/02
Classification coopérativeA61F2230/0006, A61F2002/068, A61F2/01, A61B17/22032, A61F2250/0003
Classification européenneA61F2/01, A61B17/22E2
Événements juridiques
DateCodeÉvénementDescription
10 août 2005REMIMaintenance fee reminder mailed
23 janv. 2006LAPSLapse for failure to pay maintenance fees
21 mars 2006FPExpired due to failure to pay maintenance fee
Effective date: 20060122