摘要:
Apparatus and methods are provided for delivering a stent into an ostium. The apparatus includes a catheter including a proximal end, a distal end, and proximal and distal balloons disposed adjacent one another on the distal end. The balloons are expandable independently of one another, and a stent is provided surrounding the balloons. During use, the distal end of the catheter is introduced into a main lumen, and the proximal balloon is inflated to flare a proximal portion of the stent. The distal end is then advanced into the ostium until the flared proximal portion contacts a wall of the main lumen surrounding the ostium. The distal balloon is inflated to expand a distal portion of the stent, e.g., to dilate a lesion within the branch and/or ostium. Thereafter, the balloons are collapsed, and the apparatus is withdrawn, leaving the stent within the ostium.
摘要:
Apparatus and methods are provided for use in filtering emboli from a vessel and/or performing thrombectomy and embolectomy, wherein a vascular device disposed on a guidewire comprises a support hoop disposed from a suspension strut. Alternately, a support hoop having an articulation region may be directly connected to a region proximate the distal end of the guidewire. A blood permeable sac is affixed to the support hoop to form a mouth of the blood permeable sac. The support hoop is disposed obliquely relative to the longitudinal axis of the guidewire and is capable of being properly used in a wide range of vessel diameters. The vascular device collapses during removal to prevent material from escaping from the sac. A delivery sheath and introducer sheath for use with the vascular device of the present invention are also provided.
摘要:
Apparatus (20) and methods are provided for use in filtering emboli from a vessel and/or performing thrombectomy and embolectomy, wherein a vascular device comprises one or more support hoops (24) connected near a distal end (23) of a guide wire, each support hoop (24) having an articulation region, and a blood permeable sac (28) affixed to the support hoop (24) or hoops to form a mouth of the blood permeable sac (28). The mouth of the sac (28) closes when the apparatus (20) is collapsed for removal to prevent material from escaping from the sac (28).
摘要:
Apparatus and methods for sealing a puncture through tissue or otherwise treating a body lumen of a patient. The carrier includes at least one, but not all, of the adherent layer components required to form a tacky or sticky adherent layer on the carrier. The remaining adherent layer precursor(s) are delivered to the carrier in situ to form a sticky and/or tacky adherent layer on the carrier that enhances the attachment and retention of the carrier to tissue surrounding a target treatment location in which the carrier is delivered. The carrier may include hydrogel and/or other porous material, e.g., for releasing one or more agents carried by the carrier at the treatment location.
摘要:
Apparatus (20) is provided for use in filtering emboli from a vessel (17) such as the ascending aorta, wherein a vascular device comprises a support hoop (24) having an articulation region (26) connected near a distal end (23) of an elongated member, a blood permeable sac (28) affixed to the support hoop so that the support hoop forms a mouth of the blood permeable sac, a guide wire (22), and a delivery sheath. The articulation region comprises a reduced thickness region of the support hoop that prevents kinks from forming in the support hoop when the apparatus is contracted to its delivery state, and curved regions that close the mouth of the sac to prevent material escaping from the sac when the apparatus is collapsed for removal.
摘要:
Apparatus (20) and methods are provided for use in filtering emboli from a vessel such as the ascending aorta, wherein a vascular device comprises a support hoop having an articulation (26) region connectioned near a distal end (23) of an elongated member, a blood permeable sac (28) affixed to the support hoop (24) so that the support hoop (24) forms a mouth of the blood permeable sac (28), a guide wire, and a delivery sheath. The articulation region (26) comprises a reduced thickness region of the support hoop (24) that prevents kinks from forming in the support hoop (24) when the apparatus (20) is contracted to its delivery state, and curved regions that close the mouth of the sac (28) to prevent material escaping from the sac when the apparatus is collapsed for removal.
摘要:
Methods and devices for treating a luminal pathology affecting an anatomical lumen of a patient comprising forming, in situ, a continuous cohesive layer of covalently-crosslinked hydrogel in a luminal wall of the anatomical lumen.
摘要:
Certain embodiments of the invention include forming a material in situ by introducing into a space within a patient a water soluble polymer precursor of at least about 10,000 molecular weight solubilized in a flowable aqueous solution. Functional groups on the polymer precursor undergo covalent bonding in situ to form a solid and nonbiodegradable material having a swellability less than about 20% v/v and a Young's modulus of at least about 100 kPa within about 30 seconds to about 30 minutes of initiating a chemical reaction of the functional groups to form the solid material.
摘要:
Apparatus and methods for retrieving a vascular filter from vessel from a vessel are provided wherein a retrieval adapter is delivered to a teatment site concurrently along with an interventiona ldevice to reduce the number of steps required to remove the vascular filter. The retrieval adapter also reduces the possibility of entangling the vascular filter with a stent disposed within the vessel during removal of the vascular filter. A separate retrieval catheter is also described for use in conjunction with the retrieval adapter.