Closed tip dynamic microvalve protection device
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
A61M-029/00
A61F-002/01
A61B-017/221
A61B-017/00
출원번호
US-0259293
(2014-04-23)
등록번호
US-9770319
(2017-09-26)
발명자
/ 주소
Pinchuk, Bryan
Jaroch, David Benjamin
Chomas, James E.
Arepally, Aravind
출원인 / 주소
SUREFIRE MEDICAL, INC.
대리인 / 주소
Gordon & Jacobson, P.C.
인용정보
피인용 횟수 :
0인용 특허 :
121
초록▼
An endovascular microvalve device for use in a vessel during a therapy procedure includes an outer catheter, an inner catheter displaceable within the outer catheter, and a filter valve coupled to the distal ends of the inner and outer catheters. The valve is constructed of a braid of elongate first
An endovascular microvalve device for use in a vessel during a therapy procedure includes an outer catheter, an inner catheter displaceable within the outer catheter, and a filter valve coupled to the distal ends of the inner and outer catheters. The valve is constructed of a braid of elongate first filaments coupled together at their proximal ends in a manner that the first filaments are movable relative to each other along their lengths. A filter is provided to the braid formed by electrostatically depositing or spinning polymeric second filaments onto the braided first filaments. The lumen of the inner catheter delivers a therapeutic agent beyond the valve. The device is used to provide a therapy in which a therapeutic agent is infused into an organ.
대표청구항▼
1. An endovascular microvalve device for temporary use in a vessel during an intravascular procedure, comprising: a) a flexible outer catheter having a proximal end and a distal end;b) a flexible inner catheter having a proximal end and a distal end with an orifice, the inner catheter extending thro
1. An endovascular microvalve device for temporary use in a vessel during an intravascular procedure, comprising: a) a flexible outer catheter having a proximal end and a distal end;b) a flexible inner catheter having a proximal end and a distal end with an orifice, the inner catheter extending through and longitudinally displaceable relative to the outer catheter; andc) a filter valve having a proximal end and distal end, the proximal end of the filter valve coupled to the distal end of the outer catheter, and the distal end of the filter valve coupled to the inner catheter adjacent the distal end of the inner catheter, such that longitudinal displacement of the inner catheter relative to the outer catheter moves the filter valve from a non-deployed configuration to a deployed configuration, the filter valve having a proximal portion and distal portion, and a maximum diameter of the filter valve being defined between the proximal and distal portions, the proximal portion exerting an increased radial force relative to the distal portion, and the distal portion comprising a porous polymeric material defining a pore size not exceeding 500 μm wherein: once said filter valve is in said deployed state in the vessel, said filter valve is adapted to be dynamically movable depending on a local fluid pressure about said filter valve, such that,when the fluid pressure is higher on a proximal side of the filter valve, the filter valve assumes a first configuration with a first maximum diameter smaller than the diameter of the vessel such that fluid flow about the filter valve is permitted, andwhen said fluid pressure is higher on a distal side of the filter valve, the higher fluid pressure causes the filter valve to assume a second configuration with a second maximum diameter relatively larger than the first maximum diameter and in which the filter valve is adapted to contact the vessel wall. 2. An endovascular microvalve device according to claim 1, wherein: the proximal portion includes a filamentary braid, and the distal portion is constructed without a filamentary braid. 3. An endovascular microvalve device according to claim 2, wherein: the porous polymeric material of the distal portion is a membranous material. 4. An endovascular microvalve device according to claim 3, wherein: the proximal portion includes a porous polymeric membranous material. 5. An endovascular microvalve device according to claim 1, wherein: each of the proximal and distal portions have a filamentary braid, wherein the filamentary braid of the proximal portion has a different structural property than the filamentary braid of the distal portion. 6. An endovascular microvalve device according to claim 5, wherein: wherein the porous polymeric material changes shape and moves with the filamentary braid as fluid pressure conditions about said filter valve change. 7. An endovascular microvalve device according to claim 1, wherein: the proximal portion includes a filamentary braid with first filaments, and the distal portion includes a filamentary braid with second filaments, wherein the first filaments have an increased radial spring force relative to the second filaments. 8. An endovascular microvalve device according to claim 1, wherein: the proximal portion includes a filamentary braid with first filaments and a polymeric coating, and the distal portion includes a filamentary braid with second filaments, wherein the first filaments and the polymeric coating together have an increased radial spring force relative to the second filaments and the porous polymeric material. 9. An endovascular microvalve device according to claim 1, wherein: the filter valve in the deployed configuration forms a substantially oblong spherical or frustoconical shape. 10. An endovascular microvalve device according to claim 1, wherein: the distal end of the inner catheter has a first radiopaque marker, the distal end of the outer catheter has a second radiopaque marker, and the inner catheter includes a third radiopaque marker longitudinally offset from the first radiopaque marker, wherein the relative positions of the first, second and third radiopaque marker indicates the configuration of the filter valve. 11. An endovascular microvalve device according to claim 1, wherein: the porous polymeric material is homogenous over the filter valve. 12. An endovascular microvalve device according to claim 1, wherein: the porous polymeric material is heterogeneously disposed over the filter valve. 13. An endovascular microvalve device according to claim 12, wherein: the porous polymeric material has smaller pores at a proximal portion of the filter valve. 14. An endovascular microvalve device according to claim 12, wherein: the filter valve further includes a non-porous membrane over a proximal portion of the filter valve. 15. An endovascular microvalve device according to claim 1, wherein: in a non-deployed configuration, the filter valve includes a distal face that is convex in shape, and in a deployed configuration, the distal face of the filter valve is planar or concave. 16. An endovascular microvalve device according to claim 1, wherein: in a non-deployed configuration, the filter valve tapers distally over at least 50% of its length, and in a deployed configuration, the distal end of the filter valve has a maximum diameter of the filter valve. 17. An endovascular microvalve device according to claim 1, wherein: the filter valve includes a braid of filaments having a variable braid angle. 18. An endovascular microvalve device according to claim 17, wherein: the braid angle is smaller across a proximal portion of the filter valve and larger across a distal portion of the filter valve. 19. An endovascular microvalve device for temporary use in a vessel during an intravascular procedure, comprising: a) a flexible outer catheter having a proximal end and a distal end;b) a flexible inner catheter having a proximal end and a distal end with an orifice, the inner catheter extending through and longitudinally displaceable relative to the outer catheter; andc) a filter valve having a proximal end and distal end, the proximal end of the filter valve coupled to the distal end of the outer catheter, and the distal end of the filter valve coupled to the inner catheter adjacent the distal end of the inner catheter, such that longitudinal displacement of the inner catheter relative to the outer catheter moves the filter valve from a non-deployed configuration to a deployed configuration, the filter valve including, i) a plurality of elongate first filaments in a braid, each of said first filaments having a diameter of 0.025 mm to 0.127 mm, the first filaments having a proximal end, a distal end, and a length extending therebetween, the proximal ends secured relative to each other on the outer catheter such that the first filaments define a round configuration between their secured proximal ends on the outer catheter,the distal ends secured relative to each other on the inner catheter proximal of the orifice, such that the first filaments define a round configuration between their secured distal ends on the inner catheter,the first filaments along the lengths between the secured proximal and distal ends not bonded to each other such that the first filaments are movable relative to each other, andthe first filaments movable into a collapsed non-deployed configuration relative to each other, and expandable from the non-deployed configuration into a radially-expanded deployed configuration by retraction of the inner catheter relative to the outer catheter, andii) a filter comprising a polymeric coating on said braided first filaments between said proximal and distal ends of said first filaments, said filter defining a pore size not exceeding 500 μm,wherein once said filter valve is in said deployed state in the vessel, said filter valve is adapted to be dynamically movable depending on a local fluid pressure about said filter valve, such thatwhen the fluid pressure is higher on a proximal side of the filter valve, the filter valve assumes a first configuration with a first maximum diameter smaller than the diameter of the vessel such that fluid flow about the filter valve is permitted, andwhen said fluid pressure is higher on a distal side of the filter valve, the higher fluid pressure causes the filter valve to assume a second configuration with a second maximum diameter relatively larger than the first maximum diameter and in which the filter valve is adapted to contact the vessel wall, andwherein the polymeric coating onto the first filaments of the filter valve constrains the polymeric coating to change shape and move with the first filaments as fluid pressure conditions about the filter valve change. 20. An endovascular microvalve device according to claim 19, wherein: the filter valve in the deployed configuration forms a substantially oblong frustoconical or oblong spherical shape. 21. An endovascular microvalve device according to claim 19, wherein: the filter is homogenous over the filter valve. 22. An endovascular microvalve device according to claim 19, wherein: the filter is heterogeneously disposed over the filter valve. 23. An endovascular microvalve device according to claim 22, wherein: the filter further includes a non-porous membrane over a proximal portion of the filter valve. 24. An endovascular microvalve device according to claim 19, wherein: the filter has smaller pores at a proximal portion of the filter valve. 25. An endovascular microvalve device according to claim 19, wherein: in a non-deployed configuration, a distal face of the filter valve is convex, and in a deployed configuration, the face of the filter valve is planar or concave. 26. An endovascular microvalve device according to claim 19, wherein: in a non-deployed configuration, the filter valve tapers distally over at least 50% of its length, and in a deployed configuration, the distal end of the filter valve has a maximum diameter of the filter valve. 27. An endovascular microvalve device according to claim 19, wherein: the first filaments in the braid have a variable braid angle. 28. An endovascular microvalve device according to claim 27, wherein: the braid angle is smaller across a proximal portion of the filter valve and larger across a distal portion of the filter valve.
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