CN112773462B - Micro-catheter capable of reducing mouth and adjusting bending - Google Patents
Micro-catheter capable of reducing mouth and adjusting bending Download PDFInfo
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- CN112773462B CN112773462B CN202110245518.1A CN202110245518A CN112773462B CN 112773462 B CN112773462 B CN 112773462B CN 202110245518 A CN202110245518 A CN 202110245518A CN 112773462 B CN112773462 B CN 112773462B
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- pipe
- guide pipe
- handles
- traction wire
- head end
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- 238000005452 bending Methods 0.000 title abstract description 10
- 230000002792 vascular Effects 0.000 claims abstract description 7
- 210000004556 brain Anatomy 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 210000004204 blood vessel Anatomy 0.000 description 7
- 208000007536 Thrombosis Diseases 0.000 description 4
- 230000001154 acute effect Effects 0.000 description 2
- 206010008118 cerebral infarction Diseases 0.000 description 2
- 208000026106 cerebrovascular disease Diseases 0.000 description 2
- 230000003073 embolic effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 206010058178 Aortic occlusion Diseases 0.000 description 1
- 241000270295 Serpentes Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000001627 cerebral artery Anatomy 0.000 description 1
- 230000002490 cerebral effect Effects 0.000 description 1
- 230000001010 compromised effect Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009424 thromboembolic effect Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/0043—Catheters; Hollow probes characterised by structural features
- A61M25/0054—Catheters; Hollow probes characterised by structural features with regions for increasing flexibility
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/0067—Catheters; Hollow probes characterised by the distal end, e.g. tips
- A61M25/0082—Catheter tip comprising a tool
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
- A61M25/0133—Tip steering devices
- A61M25/0136—Handles therefor
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Veterinary Medicine (AREA)
- Public Health (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- General Health & Medical Sciences (AREA)
- Anesthesiology (AREA)
- Hematology (AREA)
- Pulmonology (AREA)
- Biophysics (AREA)
- Surgery (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Vascular Medicine (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
The invention discloses a micro-catheter capable of necking and bending, which belongs to the technical field of medical instruments and comprises a catheter body used for conveying a bracket or a protecting device to a vascular part in a patient.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a microcatheter capable of reducing mouth and adjusting bending.
Background
Microcatheters are used to deliver stents, coils, stents or cerebral protection devices to vascular sites within a patient, where the distal embolic protection is still blank during acute occlusion of the cerebral artery, but once the distal embolic is initiated, the patient's physical health is severely compromised. The protection device in the market at present is from taking the conveying pipe, can not carry through the microcatheter, its pipe external diameter is big, and the trafficability characteristic is poor, can't be used for opening protection of acute aortic occlusion, and the pipe head end is level, scrapes down thrombus on the vascular wall easily, gets into the neurovascular distal end, causes distal end vascular jam, forms the cerebral infarction, in addition, because the pipe is through the bending plasticity of head end when tortuous blood vessel, and the bending plasticity of microcatheter head end that has loaded thromboembolic protection system is very inconvenient, or can't carry out, so a miniport, the microcatheter of adjustable bending are urgently needed to solve above-mentioned problem.
Disclosure of Invention
The invention provides a micro-catheter capable of reducing mouth and bending, which solves the problems that in the prior art, the catheter has a flat head end, thrombus on the wall of a blood vessel is easily scraped off, a remote blood vessel is blocked, a cerebral infarction is formed, and the catheter cannot be flexibly bent according to the blood vessel.
In order to achieve the above purpose, the present invention provides the following technical solutions: a collapsible, bendable microcatheter comprising a catheter body for delivering a stent or brain protection device to a vascular site within a patient, the catheter body comprising a head end, a proximal end, and a tube connecting the head end and the proximal end;
the head end comprises a plurality of blades which can be independently opened and closed, and a coil pipe is arranged in each blade;
The proximal end comprises a retractor and a plurality of handles uniformly mounted on the sides of the retractor and used for operating the retractor;
A plurality of traction wires are uniformly distributed in the tube body along the axis direction of the tube body and correspond to the positions of the blades, wherein the traction wires are distributed on the tube body;
Each traction wire is used for connecting a corresponding coil pipe and a handle, each handle is operated, the traction device is controlled to pull each traction wire, each coil pipe is driven to shrink or stretch, and corresponding blades are controlled to swing.
Preferably, the tractor comprises a circular ring arranged at one end of the pipe body far away from the head end, nuts are arranged at positions, corresponding to the handles, in the circular ring, the nuts are internally meshed with each other, a screw rod is arranged, one end of the screw rod extends out of the circular ring and is connected with the handles, the handles rotate to drive the screw rod to rotate, the other end of the screw rod is connected with the traction wire, and the screw rod rotates to retract the traction wire.
Preferably, the first guide tubes and the second guide tubes which are parallel to each other are uniformly distributed in the tube body along the axial direction of the tube body and correspond to the coiled tubes, wherein two ends of each coiled tube are respectively connected with the same ends of the first guide tubes and the second guide tubes, one end of the traction wire is connected with the screw rod, and the other end of the traction wire is connected with the nut after sequentially penetrating through the first guide tubes, the coiled tubes and the second guide tubes.
Preferably, the pipe body comprises an inner layer pipe, a middle layer pipe and an outer layer pipe from inside to outside, each first guide pipe is positioned at the inner wall of the inner layer pipe, and each second guide pipe is positioned between the inner layer pipe and the middle layer pipe.
Preferably, the coil, the first guide tube and the second guide tube are all members made of stainless steel.
Preferably, one end of each blade far away from the pipe body is folded to form a conical head end.
Preferably, the number of the blades, the first guide tube and the second guide tube of the coil pipe, and the handles are four.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, each handle is utilized to operate the tractor, so that the traction wires connected with each handle are retracted, and under the traction of the traction wires, each blade is controlled to swing, the head end can be turned towards the expected direction according to the requirement, so that the catheter is freely and flexibly pushed in a curved multi-fork blood vessel in a human body to reach a target position, in addition, one end of each blade far away from the catheter body can be synchronously retracted inwards to form a conical head end under the simultaneous operation of a plurality of handles, the problems that the catheter has large outer diameter, poor trafficability and easiness in scraping thrombus on the blood vessel wall are solved, the functionality and reliability of the device are improved, the structure is simple, the operation is flexible, and the use is convenient.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention.
In the drawings:
FIG. 1 is a schematic view of the structure of a microcatheter of the present invention;
FIG. 2 is a schematic view of the structure of the proximal end of the present invention;
FIG. 3 is a schematic view of the retractor and the retractor wires of the present invention;
FIG. 4 is a schematic view of the connection of a snake and guide tube of the invention;
FIG. 5 is a schematic view showing the structure of the head end of the microcatheter of the present invention in a tapered state;
FIG. 6 is a schematic view of the structure of the curved state of the head end of the microcatheter of the present invention;
reference numerals in the drawings: 1. a headend; 11. a blade; 12. a coil; 2. a proximal end; 21. a retractor; 21-1, a circular ring; 21-2, nuts; 21-3, a screw; 22. a handle; 3. a tube body; 31. an inner layer tube; 32. a middle layer tube; 33. an outer layer tube; 4. a traction wire; 5. a first guide tube; 6. and a second guide tube.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.
Examples: as shown in fig. 1, the micro-catheter capable of necking and bending comprises a catheter body for conveying a stent or a brain protection device to a vascular part in a patient, wherein the catheter body comprises a head end, a proximal end and a tube body for connecting the head end and the proximal end, the head end comprises a plurality of independent openable blades, each blade is internally provided with a coiled pipe, the proximal end comprises a tractor and a plurality of handles which are uniformly arranged at the edge of the tractor and are used for operating the tractor, and a plurality of traction wires are uniformly arranged in the tube body along the axial direction of the handle and at positions corresponding to the blades, wherein each traction wire is used for connecting the corresponding coiled pipe and the handles, operating each handle, controlling the tractor to pull each traction wire, driving each coiled pipe to shrink or stretch and controlling the corresponding blade to swing.
As shown in fig. 2, the tractor comprises a circular ring installed at one end of the pipe body far away from the head end, nuts are installed at positions, corresponding to all handles, of the circular ring, a screw is installed in an inner engagement mode, one end of the screw extends out of the circular ring and is connected with the handles, the handles rotate to drive the screw to rotate, the other end of the screw is connected with a traction wire, the screw rotates to retract the traction wire, the pipe body comprises an inner layer pipe, a middle layer pipe and an outer layer pipe from inside to outside, in the embodiment, first guide pipes and second guide pipes which are parallel to each other are uniformly distributed at positions, corresponding to all the coils, of the pipe body along the axial direction of the pipe body, as shown in fig. 3-4, two ends of all the coils are respectively connected with the same ends of the first guide pipes and the second guide pipes, all the first guide pipes are located at the inner wall of the inner layer pipe, all the second guide pipes are located between the inner layer pipe and the middle layer pipe, one end of the traction wire is connected with the screw, and the other end of the traction wire sequentially penetrates through the first guide pipes, the coils and the second guide pipes are connected with the nuts, and the first guide pipes and the second guide pipes are made of stainless steel materials;
in this embodiment, as shown in FIG. 1, the number of blades, first and second guide tubes of the coil, and the number of handles are four;
when the catheter is used, as shown in fig. 5, one end of each blade far away from the catheter body is folded to form a conical head end, and the specific operation process is that one handle is rotated to control the screw to rotate, wherein one end of the traction wire is connected with the nut, the other end of the traction wire is not understood, the other end of the traction wire rotates along with the screw to draw the traction wire, so that the traction wire generates a pulling force in the proximal direction, pulls the coiled catheter to shrink and fold towards the center of the catheter body, and the handles are repeatedly operated to control all the blades to fold towards the center of the catheter body, so that the head end forms the conical head end, and the problems that the catheter has large outer diameter, poor trafficability and easy scraping of thrombus on the wall of the catheter are solved;
As shown in fig. 6, one of the handles is operable to apply force to one of the coils through the traction wire, the coil contracts, and the corresponding blade is controlled to swing in one direction, so that the head end can turn in an expected direction, and the catheter is freely and flexibly pushed in a blood vessel with multiple bending branches in a human body to reach a target position, the operation is simple and flexible, and the head end can be controlled to bend in a specified direction according to requirements.
When the work is completed, the handle is rotated to reset the screw rod and the traction wire, and each blade is automatically driven to reset under the elastic action of the coil pipe.
Finally, it should be noted that: the foregoing is merely a preferred example of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A collapsible, bendable microcatheter comprising a catheter body for delivering a stent or brain protection device to a vascular site within a patient, wherein the catheter body comprises a head end, a proximal end, and a tube connecting the head end and the proximal end; the head end comprises a plurality of blades which can be independently opened and closed, and a coil pipe is arranged in each blade; the proximal end comprises a retractor and a plurality of handles uniformly mounted on the sides of the retractor and used for operating the retractor; a plurality of traction wires are uniformly distributed in the tube body along the axis direction of the tube body and correspond to the positions of the blades, wherein the traction wires are distributed on the tube body; each traction wire is used for connecting a corresponding coil pipe and a handle, each handle is operated, the traction device is controlled to pull each traction wire, each coil pipe is driven to shrink or stretch, and corresponding blades are controlled to swing;
The tractor comprises a circular ring arranged at one end, far away from the head end, of the pipe body, nuts are arranged at positions, corresponding to the handles, in the circular ring, screw rods are arranged in the nuts in a meshed mode, one end of each screw rod extends out of the circular ring and is connected with the handles, the handles rotate to drive the screw rods to rotate, the other end of each screw rod is connected with the traction wire, and the screw rods rotate to retract the traction wire;
A first guide pipe and a second guide pipe which are parallel to each other are uniformly distributed in the pipe body along the axial direction of the pipe body and correspond to each coil pipe, wherein the two ends of each coil pipe are respectively connected with the same ends of the first guide pipe and the second guide pipe, one end of a traction wire is connected with the screw rod, and the other end of the traction wire is connected with the nut after sequentially penetrating through the first guide pipe, the coil pipe and the second guide pipe;
and one end of each blade far away from the pipe body is folded to form a conical head end.
2. A collapsible, bend-adjustable microcatheter according to claim 1, wherein: the pipe body comprises an inner layer pipe, a middle layer pipe and an outer layer pipe from inside to outside, wherein each first guide pipe is positioned at the inner wall of the inner layer pipe, and each second guide pipe is positioned between the inner layer pipe and the middle layer pipe.
3. A collapsible, bend-adjustable microcatheter according to claim 1, wherein: the coiled pipe, the first guide pipe and the second guide pipe are all members made of stainless steel materials.
4. A collapsible, bend-adjustable microcatheter according to claim 1, wherein: the number of the blades, the coil pipe, the first guide pipe, the second guide pipe and the handles is four.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110245518.1A CN112773462B (en) | 2021-03-05 | 2021-03-05 | Micro-catheter capable of reducing mouth and adjusting bending |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110245518.1A CN112773462B (en) | 2021-03-05 | 2021-03-05 | Micro-catheter capable of reducing mouth and adjusting bending |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112773462A CN112773462A (en) | 2021-05-11 |
| CN112773462B true CN112773462B (en) | 2024-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110245518.1A Active CN112773462B (en) | 2021-03-05 | 2021-03-05 | Micro-catheter capable of reducing mouth and adjusting bending |
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| CN (1) | CN112773462B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114099916B (en) * | 2021-11-16 | 2024-05-03 | 环心医疗科技(苏州)有限公司 | Microcatheter |
| CN114903664A (en) * | 2022-05-26 | 2022-08-16 | 上海心玮医疗科技股份有限公司 | Telescopic conveying guide wire |
| CN117679034B (en) * | 2024-02-04 | 2024-05-03 | 北京智冉医疗科技有限公司 | Auxiliary implantation assembly and implantation system of flexible nerve electrode |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN215079283U (en) * | 2021-03-05 | 2021-12-10 | 南京鼓楼医院 | Miniature catheter capable of necking and bending |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7377906B2 (en) * | 2004-06-15 | 2008-05-27 | Biosense Webster, Inc. | Steering mechanism for bi-directional catheter |
| WO2014127780A1 (en) * | 2013-02-22 | 2014-08-28 | Ambu A/S | Means for maintaining a tensioned pull-wire in an endoscope |
| US10188833B2 (en) * | 2015-01-21 | 2019-01-29 | Medtronic Vascular, Inc. | Guide catheter with steering mechanisms |
| CN207545617U (en) * | 2017-05-08 | 2018-06-29 | 杭州唯强医疗科技有限公司 | A kind of controllable adjustable bent catheter of deflection distance |
| CN112245767A (en) * | 2020-10-30 | 2021-01-22 | 广东脉搏医疗科技有限公司 | Controllable bent catheter |
| CN112245766A (en) * | 2020-10-30 | 2021-01-22 | 广东脉搏医疗科技有限公司 | Adjustable bent sheath pipe |
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- 2021-03-05 CN CN202110245518.1A patent/CN112773462B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN215079283U (en) * | 2021-03-05 | 2021-12-10 | 南京鼓楼医院 | Miniature catheter capable of necking and bending |
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| CN112773462A (en) | 2021-05-11 |
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Effective date of registration: 20231116 Address after: 1st and 3rd Floor, Building 38, No. 356, Zhengbo Road, Lingang New Area, China (Shanghai) Pilot Free Trade Zone, Pudong New Area, Shanghai, 200000 Applicant after: Shanghai Xinwei Medical Technology Co.,Ltd. Address before: 210000, No. 321, Zhongshan Road, Nanjing, Jiangsu Province Applicant before: NANJING DRUM TOWER Hospital |
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