EMBOLIZATION MICROCATHETER FOR DELIVERY OF BEADS TO PERIPHERAL VESSELS
An embolization microcatheter for embolization of peripheral arteries including an elongated tubular member comprising a distal end having a length of 150-500 mm and an outer diameter of less than 0.8 mm, wherein the elongated tubular member comprises a multiplicity sections, each having a length of 5 mm -150 mm, wherein a wall of each of the multiplicity of sections comprises a braid, a polymer formed around the braid and an inner liner coating an inner surface thereof; wherein the polymer of the multiplicity sections differ; and a distal tip having a length of 1 mm - 3 mm and extending between a proximal end of a first radiopaque marker of the elongated tubular member and a distal end opening of the elongated tubular member; the wall of the distal tip is devoid of braid.
1 . An embolization microcatheter for embolization of peripheral arteries comprising:
an elongated tubular member comprising a distal end extending from a proximal marker to a distal end opening, the distal end having an outer diameter of about 0.7 mm or less,
wherein the elongated tubular member comprises a multiplicity of sections, each having a length of 5 mm -120 mm, wherein a wall of each of the multiplicity of sections comprises a braid, a polymer formed around the braid and an inner liner coating an inner surface thereof; wherein the polymer of at least some of the multiplicity sections differ and wherein a thickness of the wall is less than 100 microns;
a distal tip having a length of 0.5 mm - 3 mm and extending between a proximal end of a distal radiopaque marker of the elongated tubular member and a distal end opening of the elongated tubular member; and wherein the wall of the distal tip is devoid of braid.
2 . The embolization microcatheter according to claim 1 , wherein an inner lumen of the distal end is in a range of 0.3 mm - 0.7 mm.
3 . (canceled)
4 . The embolization microcatheter according to claim 1 , wherein an inner lumen of the distal tip is below 0.5 mm.
5 . The embolization microcatheter according to claim 1 , wherein the thickness of the is less than 90 microns.
6 . The embolization microcatheter according to claim 1 , wherein the braid is made of tungsten wires.
7 . The embolization microcatheter according to claim 1 , wherein the braid is made of wires having a diameter of 15-20 microns.
8 . The embolization microcatheter according to claim 1 , wherein the braid has a picks per inch (PPI) of 150-220.
9 . The embolization microcatheter according to claim 1 , wherein the multiplicity of sections comprises at least 5 sections.
10 . The embolization microcatheter according to claim 9 , wherein the multiplicity of sections comprises at least 9 sections.
11 . The embolization microcatheter according to claim 1 , wherein the distal most section of the multiplicity of sections has a length of 5-15 mm.
12 . The embolization microcatheter according to claim 1 , wherein the distal radiopaque marker comprises a metal marker band.
13 . The embolization microcatheter of claim 1 , wherein the distal most section of the multiplicity sections comprises a filter formed in the wall of the elongated tubular member, the filter comprising a plurality of side openings, the plurality of side opening distributed in at least 5 circumferential rings spaced apart from each other by 100 microns - 200 microns.
14 . The embolization microcatheter according to claim 13 , wherein the plurality of openings is in the form of axial slits.
15 . The embolization microcatheter according to claim 14 , wherein the axial slits have a length of about 100-150 microns and a height of about 20-40 microns.
16 . The embolization microcatheter according to claim 13 , wherein a distal most of the circumferential rings of the distal most filter section is positioned about 2-6 mm proximally to the distal end opening.
17 . The embolization microcatheter according to claim 13 , wherein the plurality of side opening is distributed in at least 8 circumferential rings.
18 . The embolization microcatheter according to claim 13 , wherein each of the circumferential rings comprises 4-8 axial slits.
19 . The embolization microcatheter according to claim 13 , wherein a proximal most circumferential ring of the at least 5 circumferential rings comprises fewer side openings than rings distal thereto.
20 . (canceled)
21 . The embolization microcatheter according to claim 19 , wherein the side openings, of the proximal most circumferential section, is circumferentially shifted relative to the side openings in its neighboring circumferential section.
22 - 39 . (canceled)