US20150150589A1 - Catheter for removing foreign body in blood vessel - Google Patents
Catheter for removing foreign body in blood vessel Download PDFInfo
- Publication number
- US20150150589A1 US20150150589A1 US14/556,827 US201414556827A US2015150589A1 US 20150150589 A1 US20150150589 A1 US 20150150589A1 US 201414556827 A US201414556827 A US 201414556827A US 2015150589 A1 US2015150589 A1 US 2015150589A1
- Authority
- US
- United States
- Prior art keywords
- catheter
- capturing
- tube
- blood vessel
- unit
- 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
Links
- 210000004204 blood vessel Anatomy 0.000 title claims description 63
- 238000005520 cutting process Methods 0.000 claims abstract description 78
- 239000000126 substance Substances 0.000 claims abstract description 70
- 230000003247 decreasing effect Effects 0.000 claims abstract description 7
- 239000003550 marker Substances 0.000 claims description 7
- 208000007536 Thrombosis Diseases 0.000 description 31
- 239000000463 material Substances 0.000 description 21
- 229910001285 shape-memory alloy Inorganic materials 0.000 description 14
- 229910045601 alloy Inorganic materials 0.000 description 9
- 239000000956 alloy Substances 0.000 description 9
- 230000002093 peripheral effect Effects 0.000 description 8
- 238000009987 spinning Methods 0.000 description 8
- KHYBPSFKEHXSLX-UHFFFAOYSA-N iminotitanium Chemical compound [Ti]=N KHYBPSFKEHXSLX-UHFFFAOYSA-N 0.000 description 5
- 229910001000 nickel titanium Inorganic materials 0.000 description 5
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 3
- 239000000806 elastomer Substances 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- -1 polyethylene Polymers 0.000 description 3
- 208000037260 Atherosclerotic Plaque Diseases 0.000 description 2
- 208000031481 Pathologic Constriction Diseases 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 2
- 239000013013 elastic material Substances 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000001727 in vivo Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 239000004945 silicone rubber Substances 0.000 description 2
- 208000037804 stenosis Diseases 0.000 description 2
- 230000036262 stenosis Effects 0.000 description 2
- 241000217377 Amblema plicata Species 0.000 description 1
- 229910000925 Cd alloy Inorganic materials 0.000 description 1
- 229910000531 Co alloy Inorganic materials 0.000 description 1
- 229910017535 Cu-Al-Ni Inorganic materials 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229910004353 Ti-Cu Inorganic materials 0.000 description 1
- 206010053648 Vascular occlusion Diseases 0.000 description 1
- 239000002872 contrast media Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- 230000002792 vascular Effects 0.000 description 1
- 208000021331 vascular occlusion disease Diseases 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/3205—Excision instruments
- A61B17/3207—Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions
- A61B17/320758—Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions with a rotating cutting instrument, e.g. motor driven
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B17/221—Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/3205—Excision instruments
- A61B17/3207—Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions
- A61B17/320725—Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions with radially expandable cutting or abrading elements
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/3205—Excision instruments
- A61B17/3207—Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions
- A61B17/32075—Pullback cutting; combined forward and pullback cutting, e.g. with cutters at both sides of the plaque
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B2017/22001—Angioplasty, e.g. PCTA
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B2017/22072—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for with an instrument channel, e.g. for replacing one instrument by the other
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B2017/22072—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for with an instrument channel, e.g. for replacing one instrument by the other
- A61B2017/22078—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for with an instrument channel, e.g. for replacing one instrument by the other for rotating the instrument within a channel, e.g. an optical fibre
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B2017/22079—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for with suction of debris
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B17/221—Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions
- A61B2017/2212—Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions having a closed distal end, e.g. a loop
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B17/221—Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions
- A61B2017/2215—Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions having an open distal end
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/3205—Excision instruments
- A61B17/3207—Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions
- A61B2017/320716—Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions comprising means for preventing embolism by dislodged material
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/3205—Excision instruments
- A61B17/3207—Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions
- A61B2017/320733—Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions with a flexible cutting or scraping element, e.g. with a whip-like distal filament member
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/3205—Excision instruments
- A61B17/3207—Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions
- A61B17/320758—Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions with a rotating cutting instrument, e.g. motor driven
- A61B2017/320766—Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions with a rotating cutting instrument, e.g. motor driven eccentric
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/3205—Excision instruments
- A61B17/3207—Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions
- A61B17/320758—Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions with a rotating cutting instrument, e.g. motor driven
- A61B2017/320775—Morcellators, impeller or propeller like means
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2217/00—General characteristics of surgical instruments
- A61B2217/002—Auxiliary appliance
- A61B2217/005—Auxiliary appliance with suction drainage system
Landscapes
- Health & Medical Sciences (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Medical Informatics (AREA)
- Animal Behavior & Ethology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Molecular Biology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Surgical Instruments (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
A capturing unit provided on a distal end of a second tube can be deformed into a contracted state and an expanded state, in which the capturing unit is deployed to form a capturing chamber. The capturing chamber has an opening area decreased as it goes from a distal end opening of the capturing chamber toward a proximal end opening of the capturing chamber. A third tube rotatable relative to the second tube and a cutting unit provided on a distal end of the third tube for cutting a foreign substance are arranged in a second lumen. In the expanded state of the capturing unit, the cutting unit is arranged more toward the proximal end opening of the capturing chamber than the distal end opening.
Description
- This application is based upon and claims the benefit of priority from U.S. Provisional Patent Application No. 61/911,022 filed on Dec. 3, 2013; the entire contents of which are incorporated herein by reference.
- The present invention relates to a catheter for removing foreign body in blood vessel, and more particularly, to a catheter for removing foreign body in blood vessel, which captures/crushes a foreign substance, such as thrombus, which embolizes a blood vessel and is adhered on a blood vessel wall, and thus allows the foreign substance to be effectively sucked and removed through the catheter to the outside of the body.
- To reperfuse a blood vessel, in which stenosis or occlusion is caused due to atheromatous plaque or thrombus, an occlusion substance within the blood vessel has to be removed. A balloon catheter in which a foreign substance removing filter, such a annular wire or a mesh is stored in a catheter tube, or various apparatuses, in which a metal wire is expanded in a coil shape or in three dimensional directions so that thrombus is caught or scrapped by the metal wire, thereby removing the thrombus, have been previously proposed. Even in the case of the catheter having such a foreign substance removing filter, it is difficult to capture all fragments of atheromatous plaque or thrombus peeled from a blood vessel wall, and in addition, there are problems in that in a case of a large thrombus or the like, the thrombus is clogged in the catheter or does not enter the catheter, or the like. If such thrombus, which cannot be recovered and is freed, enters a peripheral vascular, there is a risk of causing peripheral vascular occlusion or the like. Therefore, development of an apparatus in which thrombus removed by a balloon or the like can be reliably and effectively recovered, is strongly required.
- Previously, as a suction catheter, which sucks and removes thrombus present in a blood vessel for treating stenosis due to the thrombus, a suction catheter has been known, which has an outer tube and an inner tube and in which a suction device is connected to a proximal end of the inner tube and an elastic deformable portion formed to be deformable into a contracted state and an expanded state is arranged on a distal end thereof, so that the suction device sucks and removes a foreign substance, such as thrombus, from the elastic deformable portion in the expanded state where a suction port thereof is expanded in a tapered shape (e.g., see Patent Document 1). Also, an apparatus has been known, in which, on an distal end of a catheter having a suction device, a propeller rotatably supported in the catheter is arranged, and when thrombus is sucked into a tip portion of the catheter by the suction device, the thrombus is crushed by the propeller and then is sucked and removed (e.g., see Patent Document 2).
- Patent Document 1: JP 2009-66178 A
- Patent Document 2: JP 2-61315 U
- However, in the suction catheter disclosed in
Patent Document 1, there has been a problem in that a larger thrombus than an opening of the inner tube cannot be satisfactorily sucked and removed. Also, in the catheter ofPatent Document 2, although the sucked thrombus is crushed by the propeller, a large thrombus, which cannot be sucked through an opening of the catheter, cannot be cut by the propeller, because a location of an end of the propeller coincides with a location of the distal end of the catheter as viewed along a tube axis of the catheter. Even if a portion of the thrombus has been sucked in the tip portion of the catheter, the cutting process has to be sequentially performed from the sucked portion, as a result of which there is a possibility that much time is taken to cut the entire thrombus. - The present invention has been made keeping in mind the above problems, and an object of the invention is to provide a catheter for removing foreign body in blood vessel, in which a foreign substance in vivo, such as thrombus, can be nodulized to be effectively sucked and removed.
- The above object of the present invention is achieved by the following configurations:
- (1) A catheter for removing foreign body in blood vessel, including:
- a tube that has a lumen; and
- a capturing unit that is provided on a distal end of the tube and that can have a contracted state, in which the capturing unit is contracted, and an expanded state, in which the capturing unit is expanded to form a capturing chamber;
- wherein the catheter is characterized by further including:
- a power transmitting member that is arranged in the lumen and that can rotate relative to the tube; and
- a cutting unit that is provided on a distal end of the power transmitting member for cutting a foreign substance flowed into the capturing unit;
- wherein the capturing chamber has an opening area decreased gradually from a distal end opening of the capturing chamber toward a proximal end opening of the capturing chamber; and
- in the expanded state of the capturing unit, the cutting unit is arranged more toward the proximal end opening of the capturing chamber than the distal end opening of the capturing chamber.
- (2) The catheter for removing foreign body in blood vessel according to (1), characterized in that:
- the power transmitting member is another tube having a lumen; and
- a guide wire can be inserted through the lumen of said another tube.
- (3) The catheter for removing foreign body in blood vessel according to (1) or (2), characterized in that:
- the power transmitting member is another tube having a lumen; and
- a guide unit which guides a foreign substance into the capturing chamber can be inserted through the lumen of said another tube.
- (4) The catheter for removing foreign body in blood vessel according to (3), characterized in that:
- a radiographic marker is provided to check a distance between the guide unit and the cutting unit visually.
- (5) The catheter for removing foreign body in blood vessel according to any one of (1) to (4), characterized in that:
- the cutting unit is a foldable propeller-shaped member.
- (6) The catheter for removing foreign body in blood vessel according to (5), characterized in that:
- unevenness is formed on an inner surface of the capturing chamber along a circumferential direction thereof.
- (7) The catheter for removing foreign body in blood vessel according to any one of (1) to (4), characterized in that:
- the cutting unit is an expandable meshed member.
- (8) The catheter for removing foreign body in blood vessel according to any one of (1) to (7), characterized in that:
- the power transmitting member is movable relative to the tube only toward a distal end thereof.
- According to the catheter for removing foreign body in blood vessel of the present invention as described in (1), because the capturing chamber has an opening area decreased as it goes from a distal end opening of the capturing chamber toward a proximal end opening of the capturing chamber and also, in the expanded state of the capturing unit, the cutting unit is arranged more toward the proximal end opening of the capturing chamber than the distal end opening of the capturing chamber, a foreign substance, such as thrombus, can be guided from the distal end opening having a large opening area in the capturing chamber toward the proximal end opening having a small opening area, and thus can be effectively condensed in the proximal end opening. Also, by cutting the foreign substance, which has been condensed in the proximal end opening of the capturing chamber, by the cutting unit, the foreign substance can be effectively nodulized. Therefore, a large foreign substance, which would not be previously sucked into a catheter, can be also nodulized to be effectively sucked and removed. In addition, because the cutting unit is arranged more toward the proximal end opening of the capturing chamber than the distal end opening of the capturing chamber, the cutting unit is not exposed in a blood vessel upon cutting, thereby ensuring safety.
- According to the catheter for removing foreign body in blood vessel of the present invention as described in (2), because the power transmitting member is another tube having a lumen, through which a guide wire can be inserted, the catheter can be directed by the guide wire to be reliably guided to a site, where the foreign substance is generated.
- According to the catheter for removing foreign body in blood vessel of the present invention as described in (3), because the power transmitting member is another tube having a lumen, through which a guide unit for guiding a foreign substance into the capturing chamber can be inserted, the foreign substance can be effectively guided and condensed into the capturing chamber by the guide unit.
- According to the catheter for removing foreign body in blood vessel of the present invention as described in (4), because a radiographic marker is provided to allow a distance between the guide unit and the cutting unit to be seen by eyes, contact between the cutting unit and a balloon can be prevented, thereby avoiding damage of the guide unit by the cutting unit.
- According to the catheter for removing foreign body in blood vessel of the present invention as described in (5), because the cutting unit is a foldable propeller-shaped member, even a large foreign substance can be sucked and removed by reliably cutting and nodulizing the foreign substance by the propeller-shaped member.
- According to the catheter for removing foreign body in blood vessel of the present invention as described in (6), because unevenness is formed on an inner surface of the capturing chamber along a circumferential direction thereof, the foreign substance can be ground and crushed by the unevenness formed on the inner surface of the capturing chamber and the propeller-shaped member, thereby effectively nodulizing the foreign substance.
- According to the catheter for removing foreign body in blood vessel of the present invention as described in (7), because the cutting unit is an expandable meshed member, even a large foreign substance can be sucked and removed by reliably cutting and nodulizing the foreign substance by the meshed member.
- According to the catheter for removing foreign body in blood vessel of the present invention as described in (8), because the power transmitting member is movable relative to the tube only toward a distal end thereof, the power transmitting member is moved relative to the tube toward the distal end side thereof after cutting the foreign substance, so that the nodulized foreign substance can be effectively sucked from the proximal end opening of the capturing chamber. Also, during insertion into the blood vessel, movement of the power transmitting member relative to the tube toward the proximal end side thereof is restricted, so that when inserting the tube, a location of the power transmitting member is restricted, thereby allowing an easy insertion of the tube.
-
FIG. 1 is an explanatory view showing a configuration of a first embodiment of a catheter for removing foreign body in blood vessel according to the present invention. -
FIG. 2 is an enlarged perspective view of a capturing unit, which is in a contracted state, and a cutting unit, which is received in the capturing unit in a contracted state, of the catheter for removing foreign body in blood vessel shown inFIG. 1 . -
FIG. 3 is a top view ofFIG. 2 . -
FIG. 4 is an enlarged top view of the capturing unit and the cutting unit, which are in an expanded state. -
FIG. 5A and 5B are perspective views of a cutting unit.FIG. 5A is in a contracted state, according to a second embodiment, andFIG. 5B is a perspective view of the cutting unit, which is in an expanded state. -
FIG. 6 is an enlarged top view of a capturing unit and the cutting unit, which are in an expanded state, according to the second embodiment. -
FIG. 7A and 7B are perspective views of a cutting unit.FIG. 7A is in a contracted state, according to a third embodiment, andFIG. 7B is a perspective view of the cutting unit, which is in an expanded state. -
FIG. 8 is an enlarged top view of a capturing unit and the cutting unit, which are in an expanded state, according to the third embodiment. - Each of embodiments of a catheter for removing foreign body in blood vessel according to the present invention will be now described in detail on the basis of the drawings.
-
FIG. 1 is a configuration view of a catheter for removing foreign body in blood vessel according to a first embodiment of the present invention. As shown inFIG. 1 , the catheter for removing foreign body inblood vessel 10 has a sheath 11, a capturingunit 12 and acutting unit 13. - The sheath 11 includes a
first tube 21 having a first lumen 22 and asecond tube 23 having asecond lumen 24 and has a double lumen structure in which thesecond tube 23 is inserted through the first lumen 22 of thefirst tube 21 and thus is adapted to be movable in first lumen 22 in an axial direction of thefirst tube 21. - The first and
second tubes second lumens 22 and 24 are likewise formed to have a substantially uniform inner diameter over a longitudinal direction thereof. - An
operation unit 30 is provided on a proximal end side of thesecond tube 23. Theoperation unit 30 is provided with afirst port 25 and asecond port 26. Thefirst port 25 is communicated with thesecond lumen 24 and provided on an axis of the sheath 11 (second tube 23), and also has an opening fluid-tightly occluded by a valve body, not shown, formed of silicone rubber or the like. Athird tube 41 as described below is inserted in thefirst port 25 to extend through the valve body and then to be inserted through thesecond lumen 24. - The
second port 26 is communicated with thesecond lumen 24 and formed to extend from thesecond tube 23 in a direction intersecting the axis of the sheath 11. Other devices (not shown), such as a syringe, is connected to thesecond port 26 to impart a suction force to thesecond lumen 24, so that aforeign substance 2, such as thrombus formed within ablood vessel 1, are sucked and removed through thesecond port 26 to the outside of a body. - Referring to
FIGS. 2 and 4 , the capturingunit 12 is provided on a distal end of thesecond tube 23 and adapted to be deformable into a contracted state (seeFIGS. 2 and 3 ), in which the capturing unit is received in the first lumen 22, and an expanded state (seeFIGS. 1 and 4 ), in which the capturing unit is deployed in a generally umbrella shape by a self-restoring force to form a capturingchamber 12A. - The capturing
unit 12 has a plurality of generally triangle column-shaped frame portions 31 (16 pieces in the embodiment shown in the drawings) made of a shape memory alloy (for example, Ni—Ti alloy), in which the expanded state is shape-memorized, and a plurality of sheet portions 32 (16 pieces in the embodiment shown in the drawings) formed in a membrane shape for connecting theadjacent frame portions 31 to each other and being deployable in an umbrella shape in accordance with expansion of theframe portions 31. - The
frame portions 31 are arranged at substantially equal intervals in a circumferential direction and extend in an axial direction in a state where proximal end sides 31 a of theframe portions 31 are fixed on an outer periphery of a tip of thesecond tube 23 and distal end sides 31 b of theframe portions 31 are opened. In the contracted state, in which frame portions are received in the first lumen 22, eachframe portion 31 is pushed and contracted against the restoring force, by which the shape memory alloy is to be expanded, because an outer peripheral surface of eachframe portion 31 is abutted to and constrained by an inner peripheral surface (first lumen 22) of thefirst tube 21. Namely, the capturingunit 12 in the contracted state forms a generally cylinder because the distal end sides 31 b of the plurality offrame portions 31 are aligned on a circumference. Theframe portions 31 in the contracted state are arranged so that oneridge 31 c of three ridges, which extend along an axial direction of thesecond tube 23, protrudes toward an inner surface of the cylinder. Therefore, on an inner surface of the capturingunit 12, unevenness along a circumferential direction thereof is formed. Also, theframe portions 31 in a natural state, in which constraint by the first lumen 22 is released, are deployed by the self-restoring force to become the expanded state. - The
sheet portions 32, which have a foldable flexibility, extend in the axial direction of thesecond tube 23 and also are fixed on lateral surfaces of theadjacent frame portions 31. In addition, proximal end sides of thesheet portions 32 are fixed on the outer periphery of the tip of thesecond tube 23. The foldedsheet portions 32 are deployed in an umbrella shape when theframe portions 31 become the expanded state, and thus cover between theadjacent frame portions 31 in a membrane shape. - Thus, in the contracted state (see
FIGS. 2 and 3 ), in which the capturing unit is received in the first lumen 22, the capturingunit 12 is adapted so that the distal end sides 3 lb of the plurality offrame portions 31 are gathered in a circumference shape against the restoring force of the shape memory alloy and thesheet portions 32 are folded, thereby becoming a generally cylindrical shape. Then, when the capturingunit 12, which has been received in the first lumen 22 in the contracted state, is pushed out from an opening 22 a on a distal end of the first lumen 22, constraint thereof by the first lumen 22 is released and thus the plurality offrame portions 31 are deployed in a generally umbrella shape by spacing the distal end sides 3 lb from each other by the self-restoring force, thereby forming the capturingchamber 12A (seeFIG. 4 ). - Meanwhile, it is not necessary for the
frame portions 31 to be made of a shape memory alloy, in which the expanded state is shape-memorized, and accordingly, thesheet portions 32 may be formed by a balloon. In this case, in a state, where a fluid has not been introduced into the balloon, the balloon is folded and also theframe portions 31 are also contracted so that the capturingunit 12 exhibits the contracted state, whereas in a state, where the fluid has been introduced into the balloon, the balloon is inflated and thus theframe portions 31 are also deployed in accordance with expansion of the balloon, as a result which thecapturing unit 12 forms the capturingchamber 12A. - As shown in
FIG. 1 , the capturingchamber 12A is adapted to have an opening area gradually decreased as it goes from a distal end opening 33 of the capturingchamber 12A toward a proximal end opening 34 of the capturingchamber 12A. Meanwhile, a shape of the capturingchamber 12 shown in the drawings is formed in a tapered shape, in which theframe portions 31 have a linear shape, but the present invention is not limited thereto, and accordingly, a middle part in axial direction of theframe portions 31 may be formed in a shape, which is convex or concave toward an inner wall of theblood vessel 1, and in this case, the shape of the capturingchamber 12A becomes a bowl shape or a trumpet shape. - The cutting
unit 13 is intended to nodulize theforeign substance 2, which has been flowed into the capturingchamber 12A, by cutting, crushing or grinding, and is provided on a distal end of thethird tube 41 as shown inFIGS. 1 to 4 and arranged in the capturingchamber 12A more toward the proximal end opening 34 than thedistal end opening 33. As used herein, the term ‘to nodulize’ means cutting, crushing or grinding theforeign substance 2, such as thrombus, to have a size suitable to be sucked and removed through thesecond lumen 24 without causing clogging. - The
third tube 41, which has athird lumen 42, is inserted into thesecond lumen 24 through the valve body (not shown) of thefirst port 25 and rotatable relative to thesecond tube 23, and also is arranged to be axially movable by a predetermined distance only toward a distal end side thereof. Thethird tube 41 is provided on a proximal end side thereof with a spinningrod 43 for operating the cutting unit 13 (seeFIG. 1 ), and by rotating or axially pushing and pulling the spinningrod 43, the cuttingunit 13 is rotated or translated relative to thesecond tube 23. Namely, thethird tube 41 serves as a power transmitting member for rotating and moving the cuttingunit 13. - The cutting
unit 13 according to the present embodiment has a plurality of blades 44 (8 pieces in the embodiment shown in the drawings), which have one ends 44 a on proximal end sides thereof fixed on a distal end of thethird tube 41 and the other ends 44 b on distal end sides thereof being opened, and are arranged at substantially equal intervals in a circumferential direction to take a propeller shape, and also extend in an axial direction. - Each
blade 44 has an arc-shaped cross-section shape, which is swelled outward, i.e., toward an inner peripheral surface of the capturingchamber 12A, and is formed of a shape memory alloy (for example, Ni—Ti alloy), in which an expanded state thereof is shape-memorized. Theblades 44 in a natural state are urged by a restoring force of the shape memory alloy, so that the other ends 44 b on the distal end sides of theblades 44 are flared in a direction spaced away from each other, i.e., eachblade 44 is radially flared. Further, when being received in the capturingunit 12, an outer peripheral surface of eachblade 44 is abutted to and constrained by theframe portions 31, and thus becomes a contracted state (seeFIGS. 2 and 3 ), in which the other ends 44 b on the distal end sides thereof are aligned on a circumference against the restoring force of the shape memory alloy. - Namely, the
blades 44 become a contracted state when having been received in the contracted capturingunit 12, and the plurality ofblades 44 are aligned in a cylinder shape (seeFIG. 2 ). In addition, if the capturingunit 12 is expanded to form the capturingchamber 12A, theblades 44 are also released from constraint thereof by theframe portions 31 and are flared by the restoring force of the shape memory alloy to become a deployed state (seeFIG. 4 ). - As shown in
FIG. 1 , aguide wire 50, which is provided on a tip end thereof with aballoon 52 as a guide unit, is inserted through thethird lumen 42 of thethird tube 41. Theballoon 52 serves to guide theforeign substance 2 to the capturingchamber 12A and can be expanded/contracted by a liquid(such as a contrast medium) supplied from alumen 51 of theguide wire 50. Meanwhile, it is not necessary to provide theballoon 52 on theguide wire 50, and accordingly, a balloon catheter other than theguide wire 50 may be employed. - The
balloon 52 is formed of a general material, such as polyamide elastomer. Theballoon 52 has an outer surface covered with awire material 53, which is a protection member for protecting theballoon 52 from theblades 44 and the like. Preferably, thewire material 53 is formed of Ni—Ti alloy or the like having an X-ray contrast property to allow a location thereof in vivo to be checked from the outside of a body under X-ray illumination, and serves as a radiographic marker. However, thewire material 53 is not necessary to be made of a metal, and accordingly may be made of a resin. - In addition, the
blades 44 are likewise preferably formed of alloy, such as Ni—Ti alloy, having an X-ray contrast property to serve as a radiographic marker. Therefore, locations of theballoon 52 and theblades 44 can be checked from the outside of the body, and thus when theforeign substance 2, such as thrombus is nodulized by theblades 44 while being condensed in the capturingchamber 12A by theballoon 52 as described below, interference between theballoon 52 and theblades 44 can be prevented. - Meanwhile, the radiographic markers are not limited to the
balloon 52 or theblades 44, and accordingly, rings (not shown) or the like formed of a material having an X-ray contrast property may be arranged at suitable locations. - Alternatively, Ni—Ti alloy may be substituted with a superelastic alloy, such as Au—Cd alloy, Cu—Al—Ni alloy, Ni—Ti—Co alloy, or Ni—Ti—Cu alloy, which all have an X-ray contrast property.
- In addition, the guide unit provided on the tip end of the
guide wire 50 is not limited to theballoon 52, and for example, a thrombus capturing instrument made of a wire material formed in a coil shape (see JP 2010-188068 A) or the like may be employed. - Next, a method of using the catheter for removing foreign body in
blood vessel 10 will be described. - First, as shown in
FIG. 1 , theguide wire 50 is inserted through theblood vessel 1 and the contractedballoon 52 provided on the tip of theguide wire 50 is inserted to a location, where is located beyond a site to be treated, in which theforeign substance 2, such as thrombus, exists, - Subsequently, in a state where the contracted capturing
unit 12 is received in the first lumen 22, and also the contracted cuttingunit 13 is received in the capturingunit 12, the first, second andthird tubes blood vessel 1 along theguide wire 50, and then, distal ends of the first, second andthird tubes unit 12 and the cuttingunit 13, which all are received in the first lumen 22 to be in the contracted state, are positioned in front of theforeign substance 2. - When the capturing
unit 12 and the cuttingunit 13 are pushed out from the distal end of thefirst tube 21 by operating theoperation unit 30 of thesecond tube 23 and the spinningrod 43 of thethird tube 41, as shownFIGS. 1 and 4 , the capturingunit 12 are deployed in a generally umbrella shape by the restoring force of theframe portions 31 made of the shape memory alloy to form the capturingchamber 12A, and also theblades 44 made of the shape memory alloy are flared by the restoring force thereof so that the cuttingunit 13 becomes a deployed state. - Then, after a fluid is supplied from the
lumen 51 of theguide wire 50 to inflate theballoon 52, theguide wire 50 is retracted so that theforeign substance 2, such as thrombus, is guided into the capturingchamber 12A by theballoon 52. Because the capturingchamber 12A has an opening area gradually decreased as it goes from the distal end opening 33 of the capturingchamber 12A toward the proximal end opening 34 of the capturingchamber 12A, theforeign substance 2 is effectively condensed in the proximal end opening 34 side of the capturingchamber 12A, i.e., in the vicinity of theblades 44. - At this time, when the spinning
rod 43 is rotated, theforeign substance 2 is cut by therotating blades 44 and also ground between theframe portions 31 of the capturingchamber 12A and theblades 44 to be nodulized. Because unevenness is formed on the inner surface of the capturingchamber 12A by theridges 31 c of the triangle column-shapedframe portions 31, a resistance is applied to theforeign substance 2 by the unevenness so that theforeign substance 2 can be reliably nodulized without rotating together with theblades 44. Meanwhile, the spinningrod 43 may be manually rotated, but may be rotated by a power, such as a motor. - After the
foreign substance 2 has been nodulized by theblades 44, other devices, such as a syringe, connected to thesecond port 26, are activated to build a negative pressure inside thesecond lumen 24, so that the nodulizedforeign substance 2 is sucked and removed from thesecond port 26 to the outside of the body. At this time, by operating the spinningrod 43 to move theblades 44 in a direction toward a distal end thereof and thus to widen a gap between a distal end-side opening of thesecond lumen 24 and theblades 44, a relatively largeforeign substance 2 can be also effectively sucked and removed. - In addition, as an alternative method, the
blades 44 may be moved to a base of the second tube 23 (the vicinity of the first port 25) and then the foreign substance may be sucked and removed from thesecond port 26. In this case, thethird tube 41 has to be provided to be axially movable toward a proximal end side of thesecond tube 23 as well. - After suction and removal of the
foreign substance 2 is ended, the capturing unit 12 (capturingchamber 12A) and the cuttingunit 13, which are in the expanded state, are retracted into the first lumen 22 of thefirst tube 21 to become the contracted state against the restoring force of each thereof, and then the first, second andthird tubes blood vessel 1 and also after flatting theballoon 52, theguide wire 50 together with theballoon 52 is withdrawn from theblood vessel 1. - Meanwhile, although the
foreign substance 2, such as thrombus, is guided into the capturingchamber 12A by theballoon 52 in the foregoing description, theballoon 52 is not used, but theforeign substance 2 may be guided into the capturingchamber 12A by only suction from thesecond port 26. In this case, theballoon 52 is not required and also theguide wire 50 can be omitted. - As described above, according to the catheter for removing foreign body in
blood vessel 10 of the present embodiment, the capturingunit 12 is provided on the distal end of thesecond tube 23 and the capturingunit 12 can be deformed into a contracted state and an expanded state in which the capturingchamber 12A having an opening area decreased as it goes from the distal end opening 33 toward theproximal end opening 34, is formed. Because thethird tube 41, which is rotatable relative to thesecond tube 23, and the cuttingunit 13, which is provided on the distal end of thethird tube 41 and arranged on the proximal end opening 34 side of the capturingchamber 12A to cut theforeign substance 2 captured in the capturingchamber 12A, are disposed in thesecond lumen 24, theforeign substance 2, such as thrombus, can be guided from thedistal end opening 33 having a large opening area toward theproximal end opening 34 having a small opening area, and thus can be effectively condensed in theproximal end opening 34. Also, by cutting or grinding theforeign substance 2, which has been condensed in the proximal end opening 34 of the capturingchamber 12A, by the cuttingunit 13, theforeign substance 2 can be effectively nodulized. Therefore, a largeforeign substance 2, which would not be previously sucked into a catheter, can be also effectively sucked and removed. In addition, because thecutting unit 13 is arranged more toward the proximal end opening 34 of the capturingchamber 12A than the distal end opening 33 of the capturingchamber 12A, the cuttingunit 13 is not exposed in theblood vessel 1 upon cutting, thereby ensuring safety. - Also, because the power transmitting members is the
third tube 41 having thethird lumen 42 through which theguide wire 50 can be inserted, the catheter for removing foreign body inblood vessel 10 can be directed by theguide wire 50 to be reliably guided to a site, where the foreign substance is generated. - In addition, because the
balloon 52 for guiding theforeign substance 2 into the capturingchamber 12A can be inserted through thethird tube 41, theforeign substance 2 can be effectively guided and condensed into the capturingchamber 12A by theballoon 52. Meanwhile, theballoon 52 may be provided on theguide wire 50 as described above, and also, after other guide wires not having a balloon are used instead of theguide wire 50, a typical balloon catheter may be used. - Further, because as the radiographic makers, which allows a distance between the
balloon 52 and the cuttingunit 13 to be seen by eyes, thewire material 53 and theblades 44 are formed of materials having an X-ray contrast property, theballoon 52 and theblades 44 can be operated while checking locations thereof from the outside of the body, thereby preventing contact between the cuttingunit 13 and theballoon 52 and thus avoiding damage of theballoon 52 by the cuttingunit 13. - Further, because the
cutting unit 13 is the plurality offoldable blades 44, even a largeforeign substance 2 can be reliably sucked and removed by cutting and nodulizing theforeign substance 2 by theblades 44. - Further, because unevenness along a circumferential direction is formed on the inner surface of the capturing
chamber 12A by the triangle column-shapedframe portions 31, theforeign substance 2 can be ground and crushed by the unevenness formed on the inner surface of the capturingchamber 12A and theblades 44, thereby effectively nodulizing theforeign substance 2. - In addition, because the
third tube 41 can be moved relative to thesecond tube 23 only toward the distal end side thereof, thethird tube 41 is moved relative to thesecond tube 23 toward the distal end side thereof after nodulizing theforeign substance 2, so that the nodulizedforeign substance 2 can be effectively sucked from the proximal end opening 34 of the capturingchamber 12A. Also, during insertion into theblood vessel 1, movement of thethird tube 41 relative to thesecond tube 23 toward the proximal end side thereof is restricted, so that when inserting thesecond tube 23 into theblood vessel 1, a location of thethird tube 41 is restricted, thereby allowing an easy insertion of the second tube. Meanwhile, thethird tube 41 may be configured to be movable relative to thesecond tube 23 toward the distal end side and the proximal end side. - Next, a second embodiment of a catheter for removing foreign body in blood vessel will be described with reference to
FIGS. 5 and 6 . Meanwhile, in an catheter for removing foreign body in blood vessel according to each of the following embodiments, a cutting unit is only different from that in the catheter for removing foreign body in blood vessel according to the first embodiment and the other portions are identical to those in the catheter for removing foreign body in blood vessel according to the first embodiment of the present invention, and accordingly, the cutting unit will be only illustrated and described. -
FIG. 5A is a perspective view of a cutting unit, which is in a contracted state, according to the second embodiment,FIG. 5B is a perspective view of the cutting unit, which is in an expanded state, andFIG. 6 is an enlarged top view of a capturing unit and the cutting unit, which are in an expanded state, according to the second embodiment. - As shown in
FIGS. 5 and 6 , the cuttingunit 13 of the catheter for removing foreign body inblood vessel 10 according to the second embodiment has acylindrical base portion 61 fixed on a distal end of athird tube 41 and a plurality of propellers 62 (4 pieces in the embodiment shown in the drawings) provided on an outer peripheral surface of thecylindrical base portion 61 at equal intervals along a circumferential direction thereof. - The
propellers 62 are formed of a shape memory alloy, in which an expanded state, where the propellers extend radially outward from thecylindrical base portion 61, is shape-memorized, and are deformable into a contracted state, in which, as shown inFIG. 5A , the propellers are constrained and received in a capturingunit 12 and folded along the outer peripheral surface of thecylindrical base portion 61, and an expanded state, in which, as shown inFIG. 5B , the propellers are radially deployed by a restoring force of the shape memory alloy. Meanwhile, thepropellers 62 are preferably formed of an elastic material having an X-ray contrast property, so that a function of a radiographic marker can be imparted thereto. - As shown in
FIG. 6 , when the capturingunit 12, which has been pushed out from a distal end opening 22 a of a first lumen 22, is expanded to form a capturingchamber 12A, thepropellers 62, which have been received in the capturingunit 12 in the contracted state, are flared by the restoring force of the shape memory alloy to become the expanded state. - Then, by operating a spinning
rod 43 to rotate thepropellers 62, aforeign substance 2, such as thrombus, condensed in the capturingchamber 12A is cut and nodulized and then sucked and removed from asecond port 26 to the outside of the body. - As described above, according to the catheter for removing foreign body in
blood vessel 10 of the present embodiment, because thecutting unit 13 is thefoldable propellers 62, even a largeforeign substance 2 can be reliably sucked and removed by reliably cutting and nodulizing theforeign substance 2 by thepropellers 62. - Next, a third embodiment of a catheter for removing foreign body in blood vessel according to the present invention will be described with reference to
FIGS. 7 and 8 . - As shown in
FIGS. 7 and 8 , the cuttingunit 13 of the present embodiment is formed of ameshed member 65. Themeshed member 65 is constituted of a plurality ofwire materials 66 fixed on a distal end of athird tube 41 and extending in an axial direction and ring-shapedwire materials 67 coupled to the plurality ofwire materials 66 at predetermined intervals. Meanwhile, lengths of the ring-shapedwire materials 67 are set to have the shortest length in ring-shapedwire materials 67 arranged on end sides of thewire materials 66 and to be gradually lengthened as they go toward the middle part in an axial direction of thewire materials 66. - The
wire materials 66 are formed of a shape memory alloy, which is shape-memorized to have a generally elliptical shape in a natural state, and are deformable into an contracted state, in which, as shown inFIG. 7A , thewire materials 66 become a linear state to form a meshed cylinder, and an expanded state, in which, as shown inFIG. 7B , due to a restoring force of the shape-memorizedwire materials 66, the middle part in the axial direction thereof is swelled radially outward. Meanwhile, themeshed member 65 is preferably formed of an elastic material having an X-ray contrast property, so that a function of a radiographic marker can be imparted thereto. - When a capturing
unit 12 is pushed out from a distal end opening 22 a of the first lumen 22, the plurality ofwire materials 66 constituting themeshed member 65 are released from constraint by the first lumen 22, and thus the middle part thereof is swelled radially outward by the self-restoring thereof to be deformed into a generally elliptical shape, thereby forming a capturingchamber 12A. - Then, by operating a spinning
rod 43 to rotate themeshed member 65, aforeign substance 2, such as thrombus, condensed in the capturingchamber 12A is cut and nodulized by the meshedmember 65 and then sucked and removed from asecond port 26 to the outside of the body. - As described above, according to the catheter for removing foreign body in
blood vessel 10 of the present embodiment, because thecutting unit 13 is the expandablemeshed member 65, even a largeforeign substance 2 can be reliably sucked and removed by reliably cutting and nodulizing theforeign substance 2 by the meshedmember 65. - Meanwhile, the present invention is not limited to each of the foregoing embodiments, and accordingly, appropriate changes, modifications or the like thereof can be made.
- For examples, a vibration generating member may be provided on the capturing
unit 12, the cuttingunit 13, theballoon 52 and the like, so that the vibration generating member can generate a vibration by operation of a user. In this case, due to the vibration of the vibration generating member, a vibration can be applied to the foreign substance flowed into the capturingchamber 12A, so that the foreign substance becomes smaller pieces to easily flow. - In addition, the sheath 11 is not necessary to include the
first tube 21 having the first lumen 22 and thesecond tube 23 having thesecond lumen 24, but may be constituted of only thesecond tube 23 having thesecond lumen 24, and thus, a member corresponding to thefirst tube 21 having the first lumen 22 may be separately prepared during surgery and also may be employed as a guiding catheter used in other treatments. Therefore, for example, when a stent or the like is indwelled after removing a foreign substance, an operation can be performed with the guiding catheter remained. - More specifically, if the guiding catheter is used instead of the
first tube 21 of the sheath 11, when the sheath 11 is withdrawn, the second andthird tubes - 2 Foreign substance
- 10 Catheter for removing foreign body in blood vessel
- 11 Sheath
- 12 Capturing unit
- 12A Capturing chamber
- 13 Cutting unit
- 21 First tube
- 22 First lumen
- 22 a Opening
- 23 Second tube (Tube)
- 24 Second lumen
- 33 Distal end opening
- 34 Proximal end opening
- 41 Third tube (Power transmitting member)
- 42 Third lumen
- 44 Blade (Cutting unit, Propeller-shaped member)
- 50 Guide wire
- 52 Balloon (Guide unit)
- 53 Wire material (Protection member)
- 62 Propeller (Cutting unit, Propeller-shaped member)
- 65 Meshed member (Cutting unit)
Claims (8)
1. A catheter for removing foreign body in blood vessel, comprising:
a tube that has a lumen; and
a capturing unit that is provided on a distal end of the tube and that has a contracted state, in which the capturing unit is contracted, and an expanded state, in which the capturing unit is expanded to form a capturing chamber;
wherein the catheter further comprise:
a power transmitting member that is arranged in the lumen and that rotates relative to the tube; and
a cutting unit that is provided on a distal end of the power transmitting member for cutting a foreign substance flowed into the capturing unit;
wherein the capturing chamber has an opening area decreased gradually from a distal end opening of the capturing chamber toward a proximal end opening of the capturing chamber; and
in the expanded state of the capturing unit, the cutting unit is arranged more toward the proximal end opening of the capturing chamber than the distal end opening of the capturing chamber.
2. The catheter for removing foreign body in blood vessel according to claim 1 ,
wherein the power transmitting member is another tube having a lumen; and
a guide wire is configured to be inserted through the lumen of said another tube.
3. The catheter for removing foreign body in blood vessel according to claim 1 ,
wherein the power transmitting member is another tube having a lumen; and
a guide unit which guides a foreign substance into the capturing chamber is configured to be inserted through the lumen of said another tube.
4. The catheter for removing foreign body in blood vessel according to claim 3 ,
wherein a radiographic marker is provided to check a distance between the guide unit and the cutting unit visually.
5. The catheter for removing foreign body in blood vessel according to claim 1 ,
wherein the cutting unit is a foldable propeller-shaped member.
6. The catheter for removing foreign body in blood vessel according to claim 5 ,
wherein unevenness is formed on an inner surface of the capturing chamber along a circumferential direction thereof.
7. The catheter for removing foreign body in blood vessel according to claim 1 ,
wherein the cutting unit is an expandable meshed member.
8. The catheter for removing foreign body in blood vessel according to claim 1 ,
wherein the power transmitting member is movable relative to the tube only toward a distal end thereof.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/556,827 US20150150589A1 (en) | 2013-12-03 | 2014-12-01 | Catheter for removing foreign body in blood vessel |
US16/130,516 US11426192B2 (en) | 2013-12-03 | 2018-09-13 | Catheter for removing foreign body in blood vessel |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201361911022P | 2013-12-03 | 2013-12-03 | |
US14/556,827 US20150150589A1 (en) | 2013-12-03 | 2014-12-01 | Catheter for removing foreign body in blood vessel |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US16/130,516 Continuation US11426192B2 (en) | 2013-12-03 | 2018-09-13 | Catheter for removing foreign body in blood vessel |
Publications (1)
Publication Number | Publication Date |
---|---|
US20150150589A1 true US20150150589A1 (en) | 2015-06-04 |
Family
ID=52013854
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/556,827 Abandoned US20150150589A1 (en) | 2013-12-03 | 2014-12-01 | Catheter for removing foreign body in blood vessel |
US16/130,516 Active 2036-03-23 US11426192B2 (en) | 2013-12-03 | 2018-09-13 | Catheter for removing foreign body in blood vessel |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US16/130,516 Active 2036-03-23 US11426192B2 (en) | 2013-12-03 | 2018-09-13 | Catheter for removing foreign body in blood vessel |
Country Status (3)
Country | Link |
---|---|
US (2) | US20150150589A1 (en) |
EP (1) | EP2881047A1 (en) |
JP (2) | JP6352642B2 (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20160256181A1 (en) * | 2015-03-06 | 2016-09-08 | Covidien Lp | Morcellator concept for tonsillectomy |
CN108542438A (en) * | 2018-05-10 | 2018-09-18 | 温州市人民医院 | One kind being used for Minimally Invasive Surgery clot processing unit |
US20180353727A1 (en) * | 2017-06-13 | 2018-12-13 | Kawasumi Laboratories, Inc. | Medical device |
CN109965920A (en) * | 2017-12-27 | 2019-07-05 | 中南大学湘雅医院 | A kind of thoracic surgery system |
WO2019173509A1 (en) | 2018-03-06 | 2019-09-12 | Viant As&O Holdings, Llc | Expandable reamer cutting head |
WO2019236239A2 (en) | 2018-06-04 | 2019-12-12 | Efremkin Pavel V | Devices and methods for intrabody surgery |
CN110934682A (en) * | 2019-12-12 | 2020-03-31 | 成都大学附属医院 | Special scissors for ostomy bag and using method thereof |
WO2020114180A1 (en) * | 2018-12-05 | 2020-06-11 | 上海蓝脉医疗科技有限公司 | Thrombus extraction device and method |
CN112472227A (en) * | 2020-11-27 | 2021-03-12 | 浙江海洋大学 | Cleaning device with function of imitating human hand grasping thrombus and cholesterol deposition |
CN114209392A (en) * | 2021-11-26 | 2022-03-22 | 上海玮琅医疗科技有限公司 | Double-guide-wire thrombus cutting and thrombus capturing bracket assembly |
EP3801312A4 (en) * | 2018-06-04 | 2022-06-01 | Pavel V. Efremkin | Devices and methods for intrabody surgery |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2019062932A (en) * | 2016-02-23 | 2019-04-25 | テルモ株式会社 | Medical device and treatment method |
KR102084618B1 (en) * | 2018-08-29 | 2020-03-04 | 계명대학교 산학협력단 | A boring device to pass true lumen of chronic total occlusion lesion |
US11253287B2 (en) | 2018-10-04 | 2022-02-22 | Neuravi Limited | Retrograde blood flow occlusion flushing device |
JP2020062317A (en) | 2018-10-19 | 2020-04-23 | 朝日インテック株式会社 | catheter |
US11172946B2 (en) | 2018-10-26 | 2021-11-16 | Progressive NEURO, Inc. | Apparatus, system, and method for vasculature obstruction removal |
CA3119221A1 (en) | 2018-11-13 | 2020-05-22 | Anaconda Biomed, Sl | A thrombectomy system and methods of extracting a thrombus from a thrombus site in a blood vessel of a patient |
US11253279B2 (en) | 2018-11-15 | 2022-02-22 | Progressive NEURO, Inc. | Apparatus, system, and method for vasculature obstruction removal |
US11197685B2 (en) | 2018-11-15 | 2021-12-14 | Progressive NEURO, Inc. | Apparatus, system, and method for vasculature obstruction removal |
JP2022516963A (en) | 2019-01-08 | 2022-03-03 | プログレッシブ ニューロ アイエヌシー | Devices, systems and methods for removing vasculature obstructions |
CN109771092B (en) * | 2019-03-26 | 2019-11-12 | 李莹 | A kind of vena cave implantation thrombus filter |
WO2020247016A1 (en) * | 2019-06-04 | 2020-12-10 | Efremkin Pavel V | Laser device for vascular and intrabody surgery and method of use |
US20240148530A1 (en) | 2021-03-30 | 2024-05-09 | SB-Kawasumi Laboratories, Inc. | Placement device |
US11944343B2 (en) | 2021-05-05 | 2024-04-02 | Covidien Lp | Aspiration catheter including mechanical cutter |
WO2023150730A2 (en) * | 2022-02-03 | 2023-08-10 | Shifamed Holdings, Llc | Thrombus removal systems and associated methods |
CN117137575A (en) * | 2023-09-06 | 2023-12-01 | 上海心玮医疗科技股份有限公司 | Flaring suction catheter with bolt cutting function |
Citations (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4811735A (en) * | 1987-07-30 | 1989-03-14 | Kensey Nash Corporation | Stone destroying catheter and method of use |
US5318576A (en) * | 1992-12-16 | 1994-06-07 | Plassche Jr Walter M | Endovascular surgery systems |
US5320627A (en) * | 1991-01-09 | 1994-06-14 | Endomedix Corporation | Method and device for intracorporeal device for intracorporeal morselling of tissue and/or calculi during endoscopic surgical procedures |
US5836868A (en) * | 1992-11-13 | 1998-11-17 | Scimed Life Systems, Inc. | Expandable intravascular occlusion material removal devices and methods of use |
US5891153A (en) * | 1997-12-23 | 1999-04-06 | Peterson; Randy | Auger nucleus extracted for cataracts |
US5897567A (en) * | 1993-04-29 | 1999-04-27 | Scimed Life Systems, Inc. | Expandable intravascular occlusion material removal devices and methods of use |
US20020019640A1 (en) * | 1997-07-24 | 2002-02-14 | Rex Medical | Breast surgery method and apparatus |
US20020151917A1 (en) * | 2001-04-12 | 2002-10-17 | Scimed Life Systems, Inc. | Ablation system with catheter clearing abrasive |
US6808531B2 (en) * | 2001-04-17 | 2004-10-26 | Scimed Life Systems, Inc. | In-stent ablative tool |
US6958069B2 (en) * | 2001-01-17 | 2005-10-25 | Mark LoGuidice | Instruments and methods for use in laparoscopic surgery |
US20080033467A1 (en) * | 2006-06-08 | 2008-02-07 | Olympus Medical Systems Corp. | Calculus crushing apparatus and medical procedure using endoscope |
US20090292307A1 (en) * | 2008-05-22 | 2009-11-26 | Nasser Razack | Mechanical embolectomy device and method |
US20110257674A1 (en) * | 2008-11-26 | 2011-10-20 | Cook Incorporated | Vascular occlusion device |
US8088140B2 (en) * | 2008-05-19 | 2012-01-03 | Mindframe, Inc. | Blood flow restorative and embolus removal methods |
US20140052103A1 (en) * | 2012-08-14 | 2014-02-20 | W. L. Gore & Associates, Inc. | Devices and systems for thrombus treatment |
Family Cites Families (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4611594A (en) * | 1984-04-11 | 1986-09-16 | Northwestern University | Medical instrument for containment and removal of calculi |
DE8813144U1 (en) | 1988-10-19 | 1988-12-15 | Guenther, Rolf W., Prof. Dr., 5100 Aachen, De | |
US5011488A (en) * | 1988-12-07 | 1991-04-30 | Robert Ginsburg | Thrombus extraction system |
US4927426A (en) * | 1989-01-03 | 1990-05-22 | Dretler Stephen P | Catheter device |
DE8910603U1 (en) * | 1989-09-06 | 1989-12-07 | Guenther, Rolf W., Prof. Dr. | |
US5092839A (en) * | 1989-09-29 | 1992-03-03 | Kipperman Robert M | Coronary thrombectomy |
US5190561A (en) * | 1991-01-23 | 1993-03-02 | Surgical Innovations, Inc. | Tissue and organ extractor |
US5263959A (en) * | 1991-10-21 | 1993-11-23 | Cathco, Inc. | Dottering auger catheter system and method |
US5971938A (en) * | 1996-04-02 | 1999-10-26 | Hart; Charles C. | Access device with expandable containment member |
US6800083B2 (en) * | 2001-04-09 | 2004-10-05 | Scimed Life Systems, Inc. | Compressible atherectomy burr |
US20030014074A1 (en) * | 2001-07-11 | 2003-01-16 | Daniel Cherfas | Method of destroying formations in a body |
US7153320B2 (en) * | 2001-12-13 | 2006-12-26 | Scimed Life Systems, Inc. | Hydraulic controlled retractable tip filter retrieval catheter |
US8070761B2 (en) * | 2003-04-10 | 2011-12-06 | Boston Scientific Scimed, Inc. | Vessel occluding material extractor |
US7377925B2 (en) * | 2003-09-16 | 2008-05-27 | Minimally Invasive Devices, Llc | Fragmentation and extraction basket |
US8475487B2 (en) * | 2005-04-07 | 2013-07-02 | Medrad, Inc. | Cross stream thrombectomy catheter with flexible and expandable cage |
US7837702B2 (en) * | 2005-12-21 | 2010-11-23 | Nexeon Medsystems, Inc. | Interventional catheter for retrograde use having embolic protection capability and methods of use |
US9149609B2 (en) * | 2006-10-16 | 2015-10-06 | Embolitech, Llc | Catheter for removal of an organized embolic thrombus |
JP2009066178A (en) | 2007-09-13 | 2009-04-02 | Goodman Co Ltd | Suction catheter |
US8613717B2 (en) * | 2007-12-20 | 2013-12-24 | Angiodynamics, Inc. | Systems and methods for removing and fragmenting undesirable material within a circulatory system |
JP5385302B2 (en) | 2007-12-26 | 2014-01-08 | ラザラス エフェクト, インコーポレイテッド | Recovery system and method of use |
JP4510125B1 (en) | 2009-02-20 | 2010-07-21 | 株式会社ウィルファイン | Intravascular thrombus trap |
WO2010102307A1 (en) * | 2009-03-06 | 2010-09-10 | Lazarus Effect, Inc. | Retrieval systems and methods for use thereof |
US8795304B2 (en) * | 2009-06-18 | 2014-08-05 | Cardiovascular Systems, Inc. | Atherectomy device, system and method having a bi-directional distal expandable ablation element |
US10039900B2 (en) * | 2010-09-07 | 2018-08-07 | Angiodynamics, Inc. | Fluid delivery and treatment device and method of use |
US8858497B2 (en) * | 2010-09-07 | 2014-10-14 | Angio Dynamics, Inc. | Device and method for removing material from a hollow anatomical structure |
EP2670318A1 (en) * | 2011-02-01 | 2013-12-11 | Curtiss T. Stinis | Vascular plaque removal systems, devices, and methods |
US9055964B2 (en) * | 2011-03-15 | 2015-06-16 | Angio Dynamics, Inc. | Device and method for removing material from a hollow anatomical structure |
US11026708B2 (en) * | 2011-07-26 | 2021-06-08 | Thrombx Medical, Inc. | Intravascular thromboembolectomy device and method using the same |
-
2014
- 2014-02-03 JP JP2014018855A patent/JP6352642B2/en active Active
- 2014-11-28 EP EP14195415.6A patent/EP2881047A1/en not_active Withdrawn
- 2014-12-01 US US14/556,827 patent/US20150150589A1/en not_active Abandoned
-
2018
- 2018-06-07 JP JP2018109612A patent/JP2018134534A/en active Pending
- 2018-09-13 US US16/130,516 patent/US11426192B2/en active Active
Patent Citations (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4811735A (en) * | 1987-07-30 | 1989-03-14 | Kensey Nash Corporation | Stone destroying catheter and method of use |
US5320627A (en) * | 1991-01-09 | 1994-06-14 | Endomedix Corporation | Method and device for intracorporeal device for intracorporeal morselling of tissue and/or calculi during endoscopic surgical procedures |
US5836868A (en) * | 1992-11-13 | 1998-11-17 | Scimed Life Systems, Inc. | Expandable intravascular occlusion material removal devices and methods of use |
US5318576A (en) * | 1992-12-16 | 1994-06-07 | Plassche Jr Walter M | Endovascular surgery systems |
US5897567A (en) * | 1993-04-29 | 1999-04-27 | Scimed Life Systems, Inc. | Expandable intravascular occlusion material removal devices and methods of use |
US20020019640A1 (en) * | 1997-07-24 | 2002-02-14 | Rex Medical | Breast surgery method and apparatus |
US5891153A (en) * | 1997-12-23 | 1999-04-06 | Peterson; Randy | Auger nucleus extracted for cataracts |
US6958069B2 (en) * | 2001-01-17 | 2005-10-25 | Mark LoGuidice | Instruments and methods for use in laparoscopic surgery |
US20020151917A1 (en) * | 2001-04-12 | 2002-10-17 | Scimed Life Systems, Inc. | Ablation system with catheter clearing abrasive |
US6808531B2 (en) * | 2001-04-17 | 2004-10-26 | Scimed Life Systems, Inc. | In-stent ablative tool |
US20080033467A1 (en) * | 2006-06-08 | 2008-02-07 | Olympus Medical Systems Corp. | Calculus crushing apparatus and medical procedure using endoscope |
US8088140B2 (en) * | 2008-05-19 | 2012-01-03 | Mindframe, Inc. | Blood flow restorative and embolus removal methods |
US20090292307A1 (en) * | 2008-05-22 | 2009-11-26 | Nasser Razack | Mechanical embolectomy device and method |
US20110257674A1 (en) * | 2008-11-26 | 2011-10-20 | Cook Incorporated | Vascular occlusion device |
US20140052103A1 (en) * | 2012-08-14 | 2014-02-20 | W. L. Gore & Associates, Inc. | Devices and systems for thrombus treatment |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20160256181A1 (en) * | 2015-03-06 | 2016-09-08 | Covidien Lp | Morcellator concept for tonsillectomy |
US20180353727A1 (en) * | 2017-06-13 | 2018-12-13 | Kawasumi Laboratories, Inc. | Medical device |
US11298504B2 (en) * | 2017-06-13 | 2022-04-12 | Kawasumi Laboratories, Inc. | Medical device |
CN109965920A (en) * | 2017-12-27 | 2019-07-05 | 中南大学湘雅医院 | A kind of thoracic surgery system |
WO2019173509A1 (en) | 2018-03-06 | 2019-09-12 | Viant As&O Holdings, Llc | Expandable reamer cutting head |
EP3745970A4 (en) * | 2018-03-06 | 2021-11-24 | Viant AS&O Holdings, LLC, | Expandable reamer cutting head |
US11083470B2 (en) * | 2018-03-06 | 2021-08-10 | Viant As&O Holdings Llc | Expandable reamer cutting head |
CN108542438A (en) * | 2018-05-10 | 2018-09-18 | 温州市人民医院 | One kind being used for Minimally Invasive Surgery clot processing unit |
WO2019236239A3 (en) * | 2018-06-04 | 2020-07-30 | Efremkin Pavel V | Devices and methods for intrabody surgery |
WO2019236239A2 (en) | 2018-06-04 | 2019-12-12 | Efremkin Pavel V | Devices and methods for intrabody surgery |
EP3801312A4 (en) * | 2018-06-04 | 2022-06-01 | Pavel V. Efremkin | Devices and methods for intrabody surgery |
WO2020114180A1 (en) * | 2018-12-05 | 2020-06-11 | 上海蓝脉医疗科技有限公司 | Thrombus extraction device and method |
CN110934682A (en) * | 2019-12-12 | 2020-03-31 | 成都大学附属医院 | Special scissors for ostomy bag and using method thereof |
CN112472227A (en) * | 2020-11-27 | 2021-03-12 | 浙江海洋大学 | Cleaning device with function of imitating human hand grasping thrombus and cholesterol deposition |
CN112472227B (en) * | 2020-11-27 | 2022-03-25 | 浙江海洋大学 | Cleaning device with function of imitating human hand grasping thrombus and cholesterol deposition |
CN114209392A (en) * | 2021-11-26 | 2022-03-22 | 上海玮琅医疗科技有限公司 | Double-guide-wire thrombus cutting and thrombus capturing bracket assembly |
Also Published As
Publication number | Publication date |
---|---|
JP2015107301A (en) | 2015-06-11 |
US11426192B2 (en) | 2022-08-30 |
EP2881047A1 (en) | 2015-06-10 |
JP6352642B2 (en) | 2018-07-04 |
JP2018134534A (en) | 2018-08-30 |
US20190008550A1 (en) | 2019-01-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US11426192B2 (en) | Catheter for removing foreign body in blood vessel | |
US10729459B2 (en) | Flow restoration systems and methods for use | |
JP7280996B2 (en) | medical device | |
US10939932B1 (en) | Expandable surgical devices and methods for making and using them | |
CN107126244B (en) | Extraction system and method of use | |
US9855071B2 (en) | Thrombectomy catheter system with reference member | |
EP2384151B1 (en) | Blood clot removal device | |
EP2741691B1 (en) | Cutting device | |
US6290710B1 (en) | Embolic protection device | |
CN105662533B (en) | Blood vessel thrombus taking device with spiral structure and thrombus therapeutic instrument thereof | |
US20220378463A1 (en) | Intravascular catheter having an expandable incising portion and embolic protection device | |
JP2018143577A (en) | Medical device, medical system, and treatment method | |
JP2018033491A (en) | Medical device and treatment method | |
WO2014178197A1 (en) | Hollow elongated body | |
JP5622989B2 (en) | Medical instruments | |
JP7137933B2 (en) | filter device | |
JP2015037492A (en) | Suction catheter and suction apparatus | |
JP2019170521A (en) | Medical care basket-shaped treatment instrument | |
US20220378566A1 (en) | Intravascular catheter having an expandable incising portion and embolic protection device | |
JP2022142878A (en) | Medical device system and treatment method |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: KAWASUMI LABORATORIES, INC., JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:YAMANOUCHI, DAI;REEL/FRAME:034290/0176 Effective date: 20141029 Owner name: YAMANOUCHI, DAI, WISCONSIN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:YAMANOUCHI, DAI;REEL/FRAME:034290/0176 Effective date: 20141029 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |