CN106823122B - Radiotherapy source applying device with expansion bracket - Google Patents
Radiotherapy source applying device with expansion bracket Download PDFInfo
- Publication number
- CN106823122B CN106823122B CN201710155548.7A CN201710155548A CN106823122B CN 106823122 B CN106823122 B CN 106823122B CN 201710155548 A CN201710155548 A CN 201710155548A CN 106823122 B CN106823122 B CN 106823122B
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- Prior art keywords
- applicator
- sleeve
- catheter
- clamping
- expansion bracket
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1001—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy using radiation sources introduced into or applied onto the body; brachytherapy
- A61N5/1014—Intracavitary radiation therapy
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1001—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy using radiation sources introduced into or applied onto the body; brachytherapy
- A61N5/1002—Intraluminal radiation therapy
- A61N2005/1003—Intraluminal radiation therapy having means for centering a radioactive source within the lumen, e.g. balloons
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Pathology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Radiology & Medical Imaging (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
The invention relates to a radiotherapy applicator with an expansion bracket, which comprises an applicator catheter; the applicator catheter passes through an applicator sleeve, two ends of the applicator catheter extend out from two ends of the applicator sleeve, and the applicator catheter shuttles in the applicator sleeve; an expansion bracket for ventilation is arranged between the applicator catheter and the applicator sleeve, and the expansion bracket is an elastic bracket which contracts when being stretched; one end of the expansion bracket is connected with the front end of the applicator catheter, the other end of the expansion bracket is connected with the applicator sleeve, and the front end of the applicator catheter is pulled to shrink when extending forwards; the beneficial effects of the invention are as follows: the elastic expansion bracket with the contractible and expandable diameter is adopted, and the expansion bracket is a reticular structure capable of circulating air, so that the obstruction of the bronchus by the catheter of the applicator can be effectively prevented, and the occurrence of pulmonary atelectasis in the treatment process caused by airway obstruction can be avoided; the catheter of the applicator is kept at the central part of the bronchus, so that the treatment effect of lung radiotherapy is improved.
Description
Technical Field
The invention belongs to a radiotherapy device, and particularly relates to a radiotherapy source applicator with an expansion bracket.
Background
When pulmonary radiotherapy is carried out, an applicator catheter is adopted to penetrate into the lung from the nasal cavity of a patient at present, the front end of the applicator catheter is usually required to be inserted into the bronchus, and when the applicator catheter is inserted into a thinner bronchus, the bronchus is blocked, and the risk of airway blockage, atelectasis and pulmonary edema exists although the radiotherapy time is only about ten minutes. If the applicator catheter is only advanced into the thicker bronchi or main bronchi, it will stick to one side of the bronchi wall, and proper dose distribution cannot be guaranteed, since the applicator catheter is a very thin tube. In pulmonary radiotherapy, the catheter of the applicator is generally required to be kept at the center of the bronchus, so that the radiotherapy dosage can be more effectively adjusted, the ideal dosage distribution is achieved, and the tumor control rate is improved.
Disclosure of Invention
The invention aims to provide a technical scheme of a radiotherapy applicator with an expansion bracket, which can prevent an applicator catheter from blocking bronchi and keep the applicator catheter at the center of the bronchi.
In order to achieve the above object, the technical scheme of the present invention is as follows: a radiation therapy applicator with an expandable stent, comprising an applicator catheter; the applicator catheter passes through an applicator sleeve, two ends of the applicator catheter extend out from two ends of the applicator sleeve, and the applicator catheter shuttles in the applicator sleeve; an expansion bracket for ventilation is arranged between the applicator catheter and the applicator sleeve, and the expansion bracket is an elastic bracket which contracts when being stretched; one end of the expansion bracket is connected with the front end of the applicator catheter, the other end of the expansion bracket is connected with the applicator sleeve, and the front end of the applicator catheter is pulled to shrink when extending forwards.
Still further, the stent is a cylindrical elastic net-shaped stent, which is contracted in outer diameter when both ends are axially stretched.
Still further, the stent is a nickel alloy wire stent.
Further, the front end of the applicator catheter is provided with a bulb connected with the expansion bracket.
Still further, a tension guide section is provided at the front end of the applicator sleeve, and the applicator sleeve is connected to the stent at the root of the tension guide section.
Further, the outer diameter of the stretching guide section is smaller than that of the applicator sleeve, and a transition conical surface is arranged at the root of the stretching guide section.
Still further, the length of the stretch guide section is no greater than the length of the stent, and the forward end of the applicator catheter extends beyond the stretch guide section.
Further, the expanded stent is in an expanded state when in a natural state, and the expanded stent is in a contracted state when the outer diameter of the expanded stent is contracted to be not more than the outer diameter of the applicator sleeve; the radiotherapy applicator with the expansion bracket is provided with a telescopic clamping piece, and the telescopic clamping piece controls the relative position between the applicator catheter and the applicator sleeve, so that the expansion bracket is kept in the expansion state or the contraction state.
Further, the telescopic clamping piece comprises a clamping sleeve and a clamping core, the front end of the clamping sleeve is fixedly connected with the rear end of the applicator sleeve, and a U-shaped clamping groove is formed in the wall of the clamping sleeve; the clamping core is sleeved on the outer diameter of the applicator catheter and fixedly connected with the applicator catheter, the rear end of the applicator catheter penetrates out of the clamping core, the outer diameter of the clamping core stretches into the clamping sleeve from the rear end of the clamping sleeve, a clamping pin is arranged on the outer diameter of the clamping core, the clamping core drives the applicator catheter to move relative to the applicator sleeve when moving in the clamping sleeve, the clamping pin moves in a U-shaped clamping groove of the clamping sleeve, and when the clamping pin moves to two ends of the U-shaped clamping groove, the expansion bracket is kept in an expansion state or a contraction state.
Further, the tail of the applicator sleeve is provided with a hanging belt, and the hanging belt is provided with a lantern ring for being sleeved and hung on the ear.
The beneficial effects of the invention are as follows: the elastic expansion bracket with the contractible and expandable diameter is adopted, and the expansion bracket is a reticular structure capable of circulating air, so that the obstruction of the bronchus by the catheter of the applicator can be effectively prevented, and the occurrence of pulmonary atelectasis in the treatment process caused by airway obstruction can be avoided; the catheter of the applicator is kept at the central part of the bronchus, so that the treatment effect of lung radiotherapy is improved.
The present invention will be described in detail with reference to the accompanying drawings and examples.
Drawings
FIG. 1 is a block diagram of the present invention with an expandable stent in an expanded state;
FIG. 2 is a block diagram of the present invention with an expandable stent in a contracted state;
FIG. 3 is an enlarged view of the structure of the expanded stent of the present invention, the expanded stent being in an expanded state;
FIG. 4 is an enlarged view of the structure of the expanded stent of the present invention, the expanded stent being in a contracted state;
FIG. 5 is an enlarged view of the telescoping clip portion of FIG. 1;
FIG. 6 is an enlarged view of the telescoping clip portion of FIG. 2;
FIG. 7 is a schematic representation of the operation of the present invention with the stent in a contracted state, and with the applicator catheter and applicator cannula inserted into the lungs;
fig. 8 is a schematic representation of the operation of the present invention with the stent in an expanded state, expanding the bronchi.
Detailed Description
Referring to fig. 1-6, a radiation therapy applicator with an expandable stent includes an applicator catheter 10; the applicator catheter passes through an applicator sleeve 20 from which two ends of the applicator catheter extend, the applicator catheter shuttled within the applicator sleeve; an air-permeable expansion stent 30 is arranged between the applicator catheter and the applicator sleeve, and the expansion stent is an elastic stent which contracts when being stretched; one end of the expansion bracket is connected with the front end of the applicator catheter, the other end of the expansion bracket is connected with the applicator sleeve, and the front end of the applicator catheter is pulled to shrink when extending forwards.
The expanded stent is a cylindrical elastic net-shaped expanded stent, and the expanded stent has a contracted outer diameter when both ends are axially stretched.
The expansion bracket is a nickel alloy wire expansion bracket.
The front end of the applicator catheter is provided with a bulb 11 connected with the expansion bracket.
The front end of the applicator sleeve is provided with a stretching guide section 21, and the applicator sleeve is connected with the expansion bracket at the root of the stretching guide section.
The outer diameter d1 of the stretching guide section is smaller than the outer diameter d2 of the applicator sleeve, and a transition conical surface 22 is arranged at the root of the stretching guide section.
The length of the stretching guide section is not greater than that of the expansion bracket, and the front end of the applicator catheter extends out of the stretching guide section.
The expansion bracket is in an expansion state when in a natural state, as shown in figure 3; the expanded stent is contracted to a contracted state when the outer diameter of the expanded stent is not larger than the outer diameter of the applicator sleeve, as shown in fig. 4; the radiation therapy applicator with an expandable stent is provided with a telescoping clip 40 which controls the relative position between the applicator catheter and applicator sleeve to maintain the expandable stent in either the expanded or contracted state.
The telescopic clamping piece comprises a clamping sleeve 41 and a clamping core 42, the front end of the clamping sleeve is fixedly connected with the rear end of the applicator sleeve, and a U-shaped clamping groove 43 is formed in the clamping sleeve wall; the clamping core is sleeved on the outer diameter of the applicator catheter and fixedly connected with the applicator catheter, the rear end of the applicator catheter penetrates out of the clamping core, the outer diameter of the clamping core stretches into the clamping sleeve from the rear end of the clamping sleeve, a clamping pin 44 is arranged on the outer diameter of the clamping core, the clamping core drives the applicator catheter to move relative to the applicator sleeve when moving in the clamping sleeve, the clamping pin moves in a U-shaped clamping groove of the clamping sleeve, and when the clamping pin moves to two ends of the U-shaped clamping groove, the expansion bracket is kept in the expansion state (shown in figure 5) or the contraction state (shown in figure 6).
The tail of the applicator sleeve is provided with a hanging belt 50 which is provided with a lantern ring 51 for hanging on the ear.
Embodiment one:
referring to fig. 1-6, a radiation therapy applicator with an expandable stent includes an applicator catheter 10; during radiotherapy, the rear end 12 of the applicator catheter is connected with a rear-loading therapeutic machine, and a guide wire with a radioactive source at the front end penetrates into the applicator catheter to reach a treatment position.
The outer diameter d3=2.5 mm of the applicator catheter, and the front end of the applicator catheter is provided with a bulb 11 with a diameter of 3.2 mm. The bulb at the front end can lead the applicator catheter to smoothly enter and exit the human body, thereby avoiding scratching organs of the human body.
An applicator sleeve 20 is sleeved outside the applicator catheter, the outer diameter d2=4.5 mm of the applicator sleeve. The front end of the applicator sleeve is provided with a section of stretching guide section 21, the outer diameter d1=2.8 mm of the stretching guide section is smaller than the outer diameter of the Yu Shiyuan applicator sleeve, and the root of the stretching guide section is provided with a transition conical surface 22.
The applicator catheter passes through the applicator sleeve, the bulb at the front end of the applicator catheter extends out from the front end of the stretching guide section of the applicator sleeve, and the rear end of the applicator catheter extends out from the rear end of the applicator sleeve. The applicator catheter can reciprocate within the applicator sleeve, causing the two ends of the applicator catheter to move telescopically beyond the two ends of the applicator sleeve.
An expansion bracket 30 is arranged between the applicator catheter and the applicator sleeve, the expansion bracket is a cylindrical elastic net-shaped expansion bracket, the expansion bracket is woven by nickel alloy wires with the diameter of 0.15mm, and the outer diameter d4=8mm of the expansion bracket in a natural state. The expansion bracket is contracted in outer diameter when the two ends are axially stretched, and can recover to a natural state after the stretching force is removed.
One end of the expansion bracket is connected with the bulb at the front end of the applicator catheter, and the metal wire of the expansion bracket is fixed on the spherical surface at the rear part of the bulb, so that the front end of the applicator catheter is prevented from entering the body. The other end of the expansion bracket is connected with the applicator sleeve, and the metal wire of the expansion bracket is fixed on the transitional conical surface at the root of the stretching guide section, so that the obstruction of the applicator catheter in and out of the body is avoided.
The length of the stretching guide section of the applicator sleeve is not greater than the length of the expansion bracket, and in the natural state of the expansion bracket, as shown in fig. 3, the stretching guide section is surrounded by the expansion bracket, and the front end of the stretching guide section is close to the front end of the applicator catheter. Because the outer diameter of the applicator catheter is smaller, the support length of the applicator catheter can be increased by stretching the guide section, and bending of the applicator catheter caused by insufficient rigidity when stretching and expanding the stent is avoided.
The expanded stent is in an expanded state when in a natural state, as shown in fig. 3. The front end of the applicator catheter is pulled to contract when extended forward, and the outer diameter of the expanded stent contracts to a contracted state when no greater than the outer diameter of the applicator sleeve, as shown in fig. 4. In this embodiment, the expanded stent is in contact with the elongate guiding section of the applicator sleeve in its contracted state.
The radiation therapy applicator with an expandable stent of this embodiment is also provided with a telescoping clip 40 that controls the relative position between the applicator catheter and the applicator sleeve to maintain the expandable stent in either the expanded or contracted state.
The telescopic clamping piece comprises a clamping sleeve 41 and a clamping core 42, the front end of the clamping sleeve is fixedly connected with the rear end of the applicator sleeve, and a U-shaped clamping groove 43 is formed in the wall of the clamping sleeve; the clamping core is sleeved on the outer diameter of the applicator catheter and fixedly connected with the applicator catheter, and the rear end of the applicator catheter penetrates out of the clamping core. The outer diameter of the clamping core extends into the clamping sleeve from the rear end of the clamping sleeve, and the clamping pin 44 is arranged on the outer diameter of the clamping core. The clamping core moves in the clamping sleeve, and the clamping pin moves in the U-shaped clamping groove of the clamping sleeve.
When the clamping core moves forwards axially, the applicator guide pipe is pushed to move forwards from the applicator sleeve, the bulb at the front end of the applicator guide pipe stretches the expansion bracket, when the clamping pin moves to the front end of the U-shaped clamping groove, the expansion bracket reaches a contracted state, at the moment, the clamping core is rotated, so that the clamping pin is clamped into the front end of the U-shaped clamping groove, and the expansion bracket is kept in the contracted state (shown in fig. 6).
When the clamping core moves backwards along the axial direction, the applicator catheter is pulled to move backwards from the applicator sleeve, the ball head at the front end of the applicator catheter is retracted from the front end of the applicator sleeve (actually, the front end of the stretching guide section), when the clamping pin moves to the rear end of the U-shaped clamping groove, the expansion bracket reaches an expansion state (namely a natural state), at the moment, the clamping core is rotated, the clamping pin is clamped into the rear end of the U-shaped clamping groove, and the expansion bracket is kept in the expansion state (shown in fig. 5).
A ring groove and a knurling section 45 which are convenient to operate are arranged at the rear end of the clamping core. A ring groove and knurled section 46 for ease of operation is provided at the front end of the ferrule.
The tail of the applicator sleeve is provided with a hanging belt 50 which is provided with a lantern ring 51 for hanging on the ear.
During pulmonary radiotherapy, the expansion bracket is kept in a contracted state by operating the expansion clamp, then the bulb at the front end of the catheter of the applicator is inserted into the bronchus 63 from the nasal cavity 61 of a patient through the respiratory tract 62, and the collar of the hanging belt is hung on the ear 64 of the patient, as shown in fig. 7. Then the telescopic clamping piece is operated to enable the expansion bracket to be in an expansion state and prop open the bronchus. Because the expansion bracket is a reticular structure capable of circulating air, the bronchus can be prevented from being blocked, and pulmonary edema of a patient can be avoided. And then the rear end of the applicator catheter is connected and then is provided with a therapeutic machine for lung radiotherapy.
Claims (6)
1. A radiation therapy applicator with an expandable stent, comprising an applicator catheter; the device is characterized in that the applicator catheter passes through an applicator sleeve, two ends of the applicator catheter extend out from two ends of the applicator sleeve, and the applicator catheter shuttles in the applicator sleeve; an expansion bracket for ventilation is arranged between the applicator catheter and the applicator sleeve, and the expansion bracket is an elastic bracket which contracts when being stretched; one end of the expansion bracket is connected with the front end of the applicator catheter, the other end of the expansion bracket is connected with the applicator sleeve, and the front end of the applicator catheter is pulled to shrink when extending forwards; the front end of the applicator catheter is provided with a ball head connected with the expansion bracket; the front end of the applicator sleeve is provided with a stretching guide section, and the applicator sleeve is connected with the expansion bracket at the root of the stretching guide section;
the expansion bracket is in an expansion state in a natural state, and the outer diameter of the expansion bracket is contracted to be not more than the outer diameter of the applicator sleeve; the radiotherapy applicator with the expansion bracket is provided with a telescopic clamping piece, and the telescopic clamping piece controls the relative position between the applicator catheter and the applicator sleeve so that the expansion bracket is kept in the expansion state or the contraction state; the telescopic clamping piece comprises a clamping sleeve and a clamping core, the front end of the clamping sleeve is fixedly connected with the rear end of the applicator sleeve, and a U-shaped clamping groove is formed in the wall of the clamping sleeve; the clamping core is sleeved on the outer diameter of the applicator catheter and fixedly connected with the applicator catheter, the rear end of the applicator catheter penetrates out of the clamping core, the outer diameter of the clamping core stretches into the clamping sleeve from the rear end of the clamping sleeve, a clamping pin is arranged on the outer diameter of the clamping core, the clamping core drives the applicator catheter to move relative to the applicator sleeve when moving in the clamping sleeve, the clamping pin moves in a U-shaped clamping groove of the clamping sleeve, and when the clamping pin moves to two ends of the U-shaped clamping groove, the expansion bracket is kept in an expansion state or a contraction state.
2. A radiation therapy applicator with an expandable stent as defined in claim 1, wherein said expandable stent is a cylindrical elastic mesh expandable stent that contracts in outer diameter when both ends are axially stretched.
3. A radiation therapy applicator with an expandable stent as defined in claim 1, wherein said expandable stent is a nickel alloy wire expandable stent.
4. A radiation therapy applicator with an expandable stent according to claim 1, wherein the outer diameter of the stretch guide section is smaller than the outer diameter of the applicator sleeve, and wherein a transition taper is provided at the root of the stretch guide section.
5. A radiation therapy applicator with an expandable stent according to claim 1, wherein the length of the elongate guiding section is no greater than the length of the expandable stent, the forward end of the applicator catheter extending beyond the elongate guiding section.
6. A radiation therapy applicator with an expandable stent as defined in claim 1, wherein a strap is provided on the tail of the applicator sleeve, said strap being provided with a collar for hooking over the ear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710155548.7A CN106823122B (en) | 2017-03-16 | 2017-03-16 | Radiotherapy source applying device with expansion bracket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710155548.7A CN106823122B (en) | 2017-03-16 | 2017-03-16 | Radiotherapy source applying device with expansion bracket |
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| Publication Number | Publication Date |
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| CN106823122A CN106823122A (en) | 2017-06-13 |
| CN106823122B true CN106823122B (en) | 2023-08-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710155548.7A Active CN106823122B (en) | 2017-03-16 | 2017-03-16 | Radiotherapy source applying device with expansion bracket |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112774018A (en) * | 2020-05-18 | 2021-05-11 | 王聪 | Conformal particle support and conveying catheter set based on portal vein |
| CN114681824B (en) * | 2022-04-06 | 2022-12-02 | 陕西省肿瘤医院 | Gynaecology is with wound of oval body back dress source ware of adorning closely |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1154256A (en) * | 1995-09-05 | 1997-07-16 | 泰尔茂株式会社 | Blood vessel dilator |
| CN201921324U (en) * | 2010-12-02 | 2011-08-10 | 西藏昌都惠恒发展有限公司 | Brach therapy device and system |
| CN207614179U (en) * | 2017-03-16 | 2018-07-17 | 中国医学科学院北京协和医院 | A kind of radiotherapy applicating device for curing with expandable stent |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8342182B2 (en) * | 2006-08-28 | 2013-01-01 | Pulmonx Corporation | Functional assessment and treatment catheters and methods for their use in the lung |
| EP2533847B1 (en) * | 2010-02-12 | 2019-12-25 | Varian Medical Systems, Inc. | Brachytherapy applicator |
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2017
- 2017-03-16 CN CN201710155548.7A patent/CN106823122B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1154256A (en) * | 1995-09-05 | 1997-07-16 | 泰尔茂株式会社 | Blood vessel dilator |
| US5827231A (en) * | 1995-09-05 | 1998-10-27 | Terumo Kabushiki Kaisha | Blood vessel dilator |
| CN201921324U (en) * | 2010-12-02 | 2011-08-10 | 西藏昌都惠恒发展有限公司 | Brach therapy device and system |
| CN207614179U (en) * | 2017-03-16 | 2018-07-17 | 中国医学科学院北京协和医院 | A kind of radiotherapy applicating device for curing with expandable stent |
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| CN106823122A (en) | 2017-06-13 |
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