CN111887972A - Freezing sacculus pipe of refrigeration uniformity - Google Patents
Freezing sacculus pipe of refrigeration uniformity Download PDFInfo
- Publication number
- CN111887972A CN111887972A CN202010806030.7A CN202010806030A CN111887972A CN 111887972 A CN111887972 A CN 111887972A CN 202010806030 A CN202010806030 A CN 202010806030A CN 111887972 A CN111887972 A CN 111887972A
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- CN
- China
- Prior art keywords
- fluid injection
- injection element
- element tube
- circle structure
- freezing
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- 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.)
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/02—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by cooling, e.g. cryogenic techniques
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00053—Mechanical features of the instrument of device
- A61B2018/00214—Expandable means emitting energy, e.g. by elements carried thereon
- A61B2018/0022—Balloons
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00053—Mechanical features of the instrument of device
- A61B2018/00273—Anchoring means for temporary attachment of a device to tissue
- A61B2018/00279—Anchoring means for temporary attachment of a device to tissue deployable
- A61B2018/00285—Balloons
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00315—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for treatment of particular body parts
- A61B2018/00345—Vascular system
- A61B2018/00404—Blood vessels other than those in or around the heart
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/02—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by cooling, e.g. cryogenic techniques
- A61B2018/0212—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by cooling, e.g. cryogenic techniques using an instrument inserted into a body lumen, e.g. catheter
Abstract
The invention relates to a freezing sacculus catheter with uniform refrigeration, belonging to the technical field of medical instruments; the device comprises a tubular fluid injection element tube, wherein a freezing saccule wrapping the tail end of the fluid injection element tube is arranged on the periphery of the tail end of the fluid injection element tube, and a single-circle structure is arranged at the tail end of the fluid injection element tube around the fluid injection element tube; and the semi-circular pipe wall outside the single-circle structure fluid injection element pipe is provided with an injection hole with the injection range reaching the inner surface of the freezing saccule. The fluid injection element tube is wound in a single-turn mode, and the injection hole has certain directionality on a single-turn structure; compared with the prior product, the freezing range of the wall of the freezing saccule is enlarged by changing the length, the shape, the area and the like of the injection hole; due to the design of the single-ring structure, the fluid injection element pipe is smaller in rigidity and smaller in axial outer contour, and the raw material cost and the processing operation cost of a product are reduced.
Description
Technical Field
The invention relates to a freezing balloon catheter with uniform refrigeration, and belongs to the technical field of medical instruments.
Background
In the process of clinically adopting a freezing balloon technology to isolate pulmonary veins to treat atrial fibrillation diseases, an irreversible ablation focus needs to be formed at the position of the pulmonary vein opening through freezing ablation, so that abnormal electric signals in the pulmonary veins cannot be conducted to the left atrium. In order to completely isolate the abnormal electrical signal conduction between the pulmonary vein and the left atrium, it is necessary that the lesion formed in the pulmonary vein is a continuous transmural lesion that wraps around the inner wall of the pulmonary vein. However, in the process of performing cryoablation on the pulmonary vein at present, since the fitting state between the balloon and the inner wall of the pulmonary vein cannot be accurately known, a doctor can only judge the fitting state between the balloon and the inner wall of the pulmonary vein by experience, and the condition of poor fitting state is very easy to occur; once the balloon is not well attached to the inner wall of the pulmonary vein, the flowing blood can form a rush between the balloon and the inner wall of the pulmonary vein, the cooling speed of the inner wall of the pulmonary vein can be greatly reduced, and the formed ablation focus has the defects that the treatment requirements cannot be met, such as discontinuity, poor wall penetration and the like.
The first generation of cryoballoon products as shown in fig. 1 had a fluid injection element tube 2 wound around the shaft in a single-turn configuration. The surface of the single-ring structure is provided with a plurality of injection holes 3 vertical to the axial direction, and refrigerant is injected into the inner cavity of the freezing saccule 1 through the injection holes 3, so that the freezing saccule wall I4 in the corresponding range is cooled, and further the cryoablation treatment of the inner wall of the pulmonary vein is realized. The structure enables the cooling range of the freezing sacculus wall 4 to be limited (limited to the circular range of the sacculus surface), so that the freezing sacculus is required to be controlled to be bent in the treatment process to ensure the concentricity of the cooling range, and the sacculus wall in the cooling range is tightly attached to the inner wall of the pulmonary vein, so that the purpose of cryoablation treatment is achieved. This freezing mechanism increases the difficulty, duration and X-ray radiation dose of the procedure. As shown in fig. 2 for the disadvantages of the first generation product, the second generation freezing balloon fluid injection element tube 5 is wound on the shaft by a multi-turn structure, and the injection hole 3 has a spatial structure in the axial direction, so that the range of cooling the second generation balloon wall 6 is increased (compared with the annular range of freezing the first generation product). This configuration ameliorates the disadvantages of the first generation products and increases the efficiency of the procedure to some extent. However, the structure has certain limitations, the rigidity of the tail end (spiral structure) of the second 5 fluid injection element tube is overlarge, the profile of the axial outer contour section is larger, the processing difficulty and raw material loss of the product are increased, and the freezing range is still limited.
Disclosure of Invention
The invention aims to solve the technical problems of increasing the range of a frozen balloon wall, reducing the rigidity of a fluid injection element and reducing the axial outer profile section of the tail end of the fluid injection element.
In order to solve the above problems, the technical solution of the present invention is to provide a freezing balloon catheter with uniform refrigeration, which comprises a tubular fluid injection element tube, wherein a freezing balloon wrapping the end of the fluid injection element tube is arranged on the periphery of the end of the fluid injection element tube, and a single circle structure is arranged at the end of the fluid injection element tube around the fluid injection element tube; and the semi-circular pipe wall outside the single-circle structure fluid injection element pipe is provided with an injection hole with the injection range reaching the inner surface of the freezing saccule.
Preferably, the single circle structure formed at the end of the fluid injection element tube body is arranged on a circular plane of a virtual circle, and the circular plane of the virtual circle is perpendicular to the central axis of the fluid injection element tube body which does not form the single circle structure.
Preferably, a single circle structure formed at the end of the tube body of the fluid injection element tube is arranged on a spiral line, and a spiral central axis formed by the spiral line is parallel to a central axis of the tube body of the fluid injection element tube which does not form the single circle structure.
Preferably, the tube wall of the tube body of the fluid injection element tube of the single-circle structure is divided into an outer arc surface of the tube body and an inner arc surface of the tube body by an arc surface which is parallel to the central axis of the single-circle structure and passes through the central axis of the tube body of the fluid injection element tube of the single-circle structure.
Preferably, injection holes are uniformly formed in the arc surface of the outer side of the pipe body.
Preferably, the injection hole injection direction arranged on the circular arc surface outside the tube body of the fluid injection element tube with the single circle structure is set from 0 degree to 180 degrees.
Preferably, the opening shape of the injection hole is a rectangle or a long waist.
Preferably, the length direction of the rectangular opening of the injection hole is parallel to the central axis of the single circle structure.
Preferably, the length direction of the long waist-shaped opening of the injection hole is parallel to the central axis of the single circle structure.
Compared with the prior art, the invention has the following beneficial effects:
the fluid injection element is wound in a single-turn mode, and the injection hole has certain directivity on a single-turn structure; compared with the prior product, the freezing range of the wall of the freezing saccule is enlarged by changing the length, the shape, the area and the like of the injection hole. Compared with the existing product, the novel liquid injection device has the advantages that the refrigerating range is larger, the whole front hemisphere of the balloon can be uniformly refrigerated, and meanwhile, due to the design of the single-ring structure, the rigidity of the liquid injection element is smaller, the axial outer contour profile is smaller, and the raw material cost and the processing operation cost of the product are reduced.
Drawings
FIG. 1 is a schematic view of a first generation cryoballoon in current use;
FIG. 2 is a schematic view of a second generation cryoballoon in current use;
FIG. 3 is a schematic view of a uniformly refrigerated cryoballoon catheter of the present invention;
FIG. 4 is an enlarged partial schematic view of the fluid injection member of the present invention;
fig. 5 is a schematic view of a uniformly refrigerated cryoballoon catheter according to a second embodiment of the present invention;
FIG. 6 is an enlarged partial schematic view of a fluid injection device according to a second embodiment of the present invention;
reference numerals: 1. freezing the balloon; 2. a fluid injection element tube I; 3. an injection hole; 4. freezing the first sacculus wall; 5. a second fluid injection element tube; 6. freezing the second balloon wall; 7. a fluid injection element tube III; 8. freezing the balloon wall III; 9. a rectangular opening;
Detailed Description
In order to make the invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings:
as shown in fig. 1-6, the invention provides a freezing balloon catheter with uniform refrigeration, which comprises a tubular fluid injection element tube, wherein a freezing balloon 1 wrapping the tail end of the fluid injection element tube is arranged on the periphery of the tail end of the fluid injection element tube, and a single-circle structure is arranged at the tail end of the fluid injection element tube around the fluid injection element tube; the semi-circular pipe wall outside the single-circle structure fluid injection element pipe is provided with an injection hole 3 with the injection range reaching the inner surface of the freezing saccule. The single circle structure formed at the tail end of the fluid injection element tube body is arranged on a circular plane of a virtual circle, and the circular plane of the virtual circle is perpendicular to the central axis of the fluid injection element tube body which does not form the single circle structure. Or a single circle structure formed at the tail end of the fluid injection element tube body is arranged on a spiral line, and a spiral central axis formed by the spiral line is parallel to the central axis of the fluid injection element tube body which does not form the single circle structure. The pipe wall of the pipe body of the fluid injection element pipe with the single circle structure is divided into an outer circular arc surface and an inner circular arc surface by the circular arc surface which is parallel to the central axis of the single circle structure and passes through the central axis of the pipe body of the fluid injection element pipe with the single circle structure. The outer circular arc surface of the tube body is evenly provided with injection holes 3. The injection direction of the injection hole 3 arranged on the arc surface at the outer side of the tube body of the fluid injection element tube with the single circle structure is arranged from 0 degree to 180 degrees. The injection holes are distributed on the whole outer side arc surface. The opening of the injection hole 3 is rectangular or long waist-shaped. The length direction of the rectangular opening 9 of the injection hole is parallel to the central axis of the single circle structure. The length direction of the long waist-shaped opening of the injection hole is parallel to the central axis of the single circle structure.
Example 1
As shown in fig. 3 and 4, in the cryoballoon according to the present invention, the fluid injection element tube three 7 is wound in a single-turn structure, and the injection holes 3 formed in the surface of the single-turn structure of the fluid injection element tube are oriented in a range of 180 ° in the axial direction parallel to the central axis of the single-turn structure. The design ensures that the refrigerant is not limited to the same direction when entering the freezing saccule through the injection hole 3 of the fluid injection element, the freezing range of the freezing saccule is enlarged, the full cooling of the three 8 frozen saccule walls, namely the front hemisphere of the freezing saccule, is realized, meanwhile, the rigidity of the fluid injection element is smaller, the profile of the axial outer contour is smaller, and the cost of raw materials and the processing operation cost are reduced.
Example 2
As shown in fig. 5 and 6, the injection hole of the fluid injection element tube iii 7 may have a rectangular shape with a rectangular opening 9, and the long side thereof coincides with the axial direction. The injection hole structure can increase the injection range of the refrigerant in the axial direction, and the effect of full cooling of the front hemisphere is realized.
While the invention has been described with respect to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. Those skilled in the art can make various changes, modifications and equivalent arrangements, which are equivalent to the embodiments of the present invention, without departing from the spirit and scope of the present invention, and which may be made by utilizing the techniques disclosed above; meanwhile, any changes, modifications and variations of the above-described embodiments, which are equivalent to those of the technical spirit of the present invention, are within the scope of the technical solution of the present invention.
Claims (9)
1. A freezing balloon catheter with uniform refrigeration comprises a tubular fluid injection element tube, wherein a freezing balloon wrapping the tail end of the fluid injection element tube is arranged on the periphery of the tail end of the fluid injection element tube, and a single-circle structure is arranged at the tail end of a tube body of the fluid injection element tube around the tube body of the fluid injection element tube; the method is characterized in that: and the semi-circular pipe wall outside the single-circle structure fluid injection element pipe is provided with an injection hole with the injection range reaching the inner surface of the freezing saccule.
2. A uniform refrigerated freezing balloon catheter as recited in claim 1 wherein: the single circle structure formed at the tail end of the fluid injection element tube body is arranged on a circular plane of a virtual circle, and the circular plane of the virtual circle is perpendicular to the central axis of the fluid injection element tube body which does not form the single circle structure.
3. A uniform refrigerated freezing balloon catheter as recited in claim 1 wherein: the single-circle structure formed at the tail end of the fluid injection element tube body is arranged on a spiral line, and the spiral central axis of the single-circle spiral line is parallel to the central axis of the fluid injection element tube body which does not form the single-circle structure.
4. A uniform refrigerated freezing balloon catheter as recited in claim 3 wherein: the pipe wall of the pipe body of the fluid injection element pipe with the single circle structure is divided into an outer circular arc surface of the pipe body and an inner circular arc surface of the pipe body by an circular arc surface which is parallel to the central axis of the single circle structure and passes through the central axis of the pipe body of the fluid injection element pipe with the single circle structure.
5. A uniform refrigerated freezing balloon catheter as recited in claim 4 wherein: and injection holes are uniformly formed in the arc surface on the outer side of the pipe body.
6. A uniform refrigerated freezing balloon catheter as recited in claim 5 wherein: the injection hole injection direction arranged on the arc surface of the outer side of the pipe body of the fluid injection element pipe with the single circle structure is arranged from 0 degree to 180 degrees.
7. A uniform refrigerated freezing balloon catheter as recited in claim 6 wherein: the opening of the injection hole is rectangular or long waist-shaped.
8. A uniform refrigerated freezing balloon catheter as recited in claim 7 wherein: the length direction of the rectangular opening of the injection hole is parallel to the central axis of the single circle structure.
9. A uniform refrigerated freezing balloon catheter as recited in claim 7 wherein: the length direction of the long waist-shaped opening of the injection hole is parallel to the central axis of the single circle structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010806030.7A CN111887972A (en) | 2020-08-12 | 2020-08-12 | Freezing sacculus pipe of refrigeration uniformity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010806030.7A CN111887972A (en) | 2020-08-12 | 2020-08-12 | Freezing sacculus pipe of refrigeration uniformity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111887972A true CN111887972A (en) | 2020-11-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010806030.7A Pending CN111887972A (en) | 2020-08-12 | 2020-08-12 | Freezing sacculus pipe of refrigeration uniformity |
Country Status (1)
| Country | Link |
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| CN (1) | CN111887972A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114288007A (en) * | 2021-12-31 | 2022-04-08 | 心诺普医疗技术（北京）有限公司 | Fluid injection device and cryoballoon catheter |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102245258A (en) * | 2008-11-12 | 2011-11-16 | 美敦力 | Coolant injection tube |
| US20150313661A1 (en) * | 2011-07-11 | 2015-11-05 | C2 Therapeutics, Inc. | Focal ablation assembly |
| US20160074090A1 (en) * | 2012-01-27 | 2016-03-17 | Medtronic Cryocath Lp | Balloon design to enhance cooling uniformity |
| CN207785273U (en) * | 2017-09-05 | 2018-08-31 | 康沣生物科技(上海)有限公司 | A kind of cryoablation conduit with pusher |
| CN110461229A (en) * | 2017-03-27 | 2019-11-15 | 美敦力 | Use condenser type or the freezing sacculus Exposure Assessment of resistance sensor |
| US20200113626A1 (en) * | 2012-02-24 | 2020-04-16 | Isolase Ltd. | Ablation techniques for the treatment of atrial fibrillation |
-
2020
- 2020-08-12 CN CN202010806030.7A patent/CN111887972A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102245258A (en) * | 2008-11-12 | 2011-11-16 | 美敦力 | Coolant injection tube |
| US20150313661A1 (en) * | 2011-07-11 | 2015-11-05 | C2 Therapeutics, Inc. | Focal ablation assembly |
| US20160074090A1 (en) * | 2012-01-27 | 2016-03-17 | Medtronic Cryocath Lp | Balloon design to enhance cooling uniformity |
| US20200113626A1 (en) * | 2012-02-24 | 2020-04-16 | Isolase Ltd. | Ablation techniques for the treatment of atrial fibrillation |
| CN110461229A (en) * | 2017-03-27 | 2019-11-15 | 美敦力 | Use condenser type or the freezing sacculus Exposure Assessment of resistance sensor |
| CN207785273U (en) * | 2017-09-05 | 2018-08-31 | 康沣生物科技(上海)有限公司 | A kind of cryoablation conduit with pusher |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114288007A (en) * | 2021-12-31 | 2022-04-08 | 心诺普医疗技术（北京）有限公司 | Fluid injection device and cryoballoon catheter |
| CN114288007B (en) * | 2021-12-31 | 2022-09-30 | 心诺普医疗技术（北京）有限公司 | Fluid injection device and cryoballoon catheter |
| WO2023124070A1 (en) * | 2021-12-31 | 2023-07-06 | 心诺普医疗技术（北京）有限公司 | Fluid jet device and cryoballoon catheter |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: Room 201, building 4, No. 590, Ruiqing Road, Zhangjiang hi tech industry east district, Pudong New Area, Shanghai 200120 Applicant after: Shanghai Xinwei Medical Technology Co.,Ltd. Address before: Room 201, building 4, No. 590, Ruiqing Road, Zhangjiang hi tech industry east district, Pudong New Area, Shanghai 200120 Applicant before: SHANGHAI HEARTCARE MEDICAL TECHNOLOGY Co.,Ltd. |
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| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20210610 Address after: 200131 building 10, No. 860, Xinyang Road, Lingang New District, China (Shanghai) pilot Free Trade Zone, Pudong New Area, Shanghai Applicant after: Shanghai Weiqi Medical Instrument Co.,Ltd. Address before: Room 201, building 4, No. 590, Ruiqing Road, Zhangjiang hi tech industry east district, Pudong New Area, Shanghai 200120 Applicant before: Shanghai Xinwei Medical Technology Co.,Ltd. |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201106 |