CN111251615B - OCT catheter tip preparation method - Google Patents
OCT catheter tip preparation method Download PDFInfo
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- CN111251615B CN111251615B CN202010069705.4A CN202010069705A CN111251615B CN 111251615 B CN111251615 B CN 111251615B CN 202010069705 A CN202010069705 A CN 202010069705A CN 111251615 B CN111251615 B CN 111251615B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00147—Holding or positioning arrangements
- A61B1/00154—Holding or positioning arrangements using guiding arrangements for insertion
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
- A61B5/0062—Arrangements for scanning
- A61B5/0066—Optical coherence imaging
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C61/00—Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor
- B29C61/02—Thermal shrinking
- B29C61/025—Thermal shrinking for the production of hollow or tubular articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/52—Joining tubular articles, bars or profiled elements
- B29C66/522—Joining tubular articles
- B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
Abstract
The application discloses a preparation method of an OCT (optical coherence tomography) catheter tip, which comprises the following steps: preprocessing, namely, thermally shrinking the diameter of one end of the imaging window tube to a preset value; and welding integration, namely welding the end part of the imaging window tube after being thermally contracted with the far-end identification tube into a whole. The application provides a preparation method of an OCT catheter tip, which is characterized in that the diameter of one end of an imaging window tube is thermally shrunk to be consistent with that of a far-end identification tube through pretreatment, then the pretreated end part of the imaging window tube is welded with the far-end identification tube to be integrated, and meanwhile, the diameter of the inner wall of a butt joint is ensured to be consistent and smooth after welding, so that the OCT catheter tip can be smoothly carried out when penetrating into or withdrawing from a guide wire, thereby greatly winning the operation time and reducing the possible risks of the operation.
Description
Technical Field
The application relates to the technical field of optical interference tomography, in particular to a method for preparing an OCT (optical coherence tomography) catheter tip.
Background
The Optical Coherence Tomography (OCT) technique is a new biomedical Optical imaging method, which can provide high resolution images (axial resolution 5-10 μm, transverse resolution 20-40 μm) of the cross section of blood vessels through an endoscopic imaging catheter. The optical imaging probe is a key component of the endoscopic imaging catheter, and the optical performance of the optical imaging probe directly influences imaging indexes such as resolution, imaging depth, contrast and the like of an image. In order to realize clear scan of the OCT on the narrow tissue in the human body, the imaging probe must be ensured to smoothly pass through the curved narrow lesion and rotate to scan, so the technical difficulty is miniaturization of the OCT endoscopic imaging probe.
When the OCT catheter tip is manufactured, a section of blue Pebax tube (a far-end identification tube) is required to be connected to the tail end of the imaging window tube to serve as a mark. The existing operation generally adopts the following modes: and (4) coating ultraviolet glue on the outer surface of the far-end identification tube by an operator, penetrating the far-end identification tube into the imaging window tube, and irradiating and curing by using an ultraviolet lamp.
This approach has the following disadvantages: the uv gel increases the risk of adverse blood contact due to direct contact of the tip with the blood of the human body. In addition, because the tip is formed by curing two kinds of pipes with ultraviolet glue, the tip is hard and the end surface is not smooth, so that the risk of adverse effect on blood vessels is increased.
Disclosure of Invention
In view of the above, the present application provides a method for manufacturing an OCT catheter tip, which includes pre-treating to thermally shrink a diameter of one end of the imaging window tube to be consistent with a diameter of a distal marker tube, and then welding and integrating the end of the imaging window tube after pre-treating with the distal marker tube, and simultaneously ensuring that an inner wall of a butt joint is consistent and smooth after welding, so that the OCT catheter tip can be smoothly performed when penetrating or withdrawing a guide wire, thereby greatly winning operation time and reducing possible risks of the operation.
To achieve the above object, according to one aspect of the present application, there is provided a method of preparing an OCT catheter tip.
The application provides a preparation method of an OCT (optical coherence tomography) catheter tip, which comprises the following steps:
preprocessing, namely, thermally shrinking the diameter of one end of the imaging window tube to a preset value;
and welding integration, namely welding the end part of the imaging window tube after being thermally contracted with the far-end identification tube into a whole.
In this application, in the preliminary treatment, include, will imaging window pipe box locates on the first dabber, then locates the pyrocondensation pipe box imaging window pipe pending one end and first dabber are gone up, then will overlap and be equipped with the imaging window pipe and the first dabber section of pyrocondensation pipe heat, through the pyrocondensation pipe is heated the shrink and is conducted heat and give imaging window pipe makes the imaging window pipe box is equipped with the internal diameter of the one end of pyrocondensation pipe with the diameter of first dabber is unanimous, removes the pyrocondensation pipe at last.
In the present application, the length of the first mandrel is not less than 2 times the length of the imaging window tube.
In the present application, the imaging window tube is composed of a transparent block polyetheramide elastomer, the outer diameter of the imaging window tube is 0.6 to 2mm, and the wall thickness of the imaging window tube is 0.05 to 0.2 mm.
In the present application, the heat shrinkable tube is made of a fluoropolymer resin, the outer diameter of the heat shrinkable tube is 0.64 to 3mm, the shrinkage ratio of the heat shrinkable tube is (1.4 to 2.5):1, and the shrinkage ratio of the heat shrinkable tube is preferably 1.4: 1.
In the application, the imaging window tube and the first mandrel section sleeved with the heat shrinkable tube are placed into a hole of a mold of a heat welding machine for heating, wherein the heating temperature is 190-210 ℃, the heating time is 5-15s, the heating temperature is preferably 200 ℃, and the heating time is preferably 10 s.
In this application, among the welding integration, include, wear all to overlap imaging window pipe and distal end sign pipe after the preliminary treatment and locate the second spindle, distal end sign pipe terminal surface with the terminal surface after imaging window pipe handles meets, then distal end sign pipe meets with imaging window pipe department of meeting cover and is equipped with the pyrocondensation pipe, will overlap and be equipped with the imaging window pipe and the distal end sign pipe of pyrocondensation pipe heat, through the shrink and the heat transfer effect of pyrocondensation pipe form a whole with distal end sign pipe and imaging window pipe heat-fusion welding, later remove the pyrocondensation pipe, follow imaging window pipe and distal end sign pipe after welding take off on the second spindle, OCT pipe point of tip preparation is accomplished.
In this application, the diameter of first dabber with the internal diameter of distal end sign pipe is the same, the external diameter of distal end sign pipe with the tip external diameter after the formation of image window pipe preliminary treatment is the same.
In this application, the diameter of the second mandrel is smaller than the diameter of the distal marker tube.
In the application, the imaging window tube and the far-end identification tube section sleeved with the heat shrinkage tube are placed into a mold hole of a thermal welder for heating, the heating temperature is 200-230 ℃, the heating time is 15-30s, the heating temperature is preferably 215 ℃, and the heating time is preferably 20 s.
In the present application, the distal marker tube is composed of a blue block polyetheramide elastomer, the outer diameter of the distal marker tube is 0.46-1.86mm, and the wall thickness of the distal marker tube is 0.05-0.2 mm.
In the application, in welding integration, the heat shrink tube completely covers the distal end identification tube, and the heat shrink tube covers a part of the imaging window tube.
According to the OCT catheter tip preparation method, one end of the imaging window tube is preprocessed through the heat shrink tube and the first mandrel, the diameter of one end of the imaging window tube is consistent with that of the far-end identification tube, accurate butt joint in the hot-melting welding process is guaranteed, meanwhile, the diameter of the inner wall of a butt joint is guaranteed to be consistent and smooth after the hot-melting welding, the OCT catheter tip can be smoothly conducted when penetrating into or withdrawing from a guide wire, operation time is greatly gained, and risks possibly existing in the operation are reduced.
According to the OCT catheter tip preparation method, the imaging window tube and the far-end identification tube form a whole by adopting a hot-melt butt joint preparation mode, OCT catheter tip preparation is achieved, the far-end identification tube fixed by ultraviolet glue is abandoned fundamentally, a structure that the imaging window tube and the far-end identification tube are overlapped is replaced, the end face is melted into a circular face by a tangent plane, so that tip hardness is remarkably reduced, the end face is smooth, safe and reliable, and the risk of damage to blood vessels caused by the OCT catheter tip in the operation process is greatly reduced. The preparation method is simple, easy to operate, safe, reliable and capable of realizing batch production.
Drawings
The drawings are included to provide a further understanding of the application and are not to be construed as limiting the application. Wherein:
figure 1 is a schematic diagram of the OCT catheter tip pretreatment stage according to the present application.
Figure 2 is a schematic illustration of OCT catheter tip weld integration according to the present application.
Figure 3 is a schematic structural view of an OCT catheter tip according to the present application.
List of reference numerals
1-a first mandrel, 2-an imaging window tube, 3-a distal end identification tube, 4-a heat shrink tube, and 5-a second mandrel.
Detailed Description
The following description of the exemplary embodiments of the present application, taken in conjunction with the accompanying drawings, includes various details of the embodiments of the application for the understanding of the same, which are to be considered exemplary only. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the present application. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.
Referring to fig. 1-3, the present application provides a method for preparing an OCT catheter tip, comprising the steps of:
the method comprises the following steps: preprocessing, namely, thermally shrinking the diameter of one end of the imaging window tube 2 to a preset value;
step two: and welding integration, namely welding the end part of the imaging window tube 2 after thermal shrinkage and the far-end identification tube 3 into a whole.
The diameter of one end of the imaging window tube 2 is thermally shrunk to be consistent with that of the far-end identification tube 3 through pretreatment, then the end of the imaging window tube 2 after pretreatment is welded and integrated with the far-end identification tube 3, and meanwhile, the diameter of the inner wall of the butt joint part is guaranteed to be consistent and smooth after welding, so that the tip of the OCT catheter can be smoothly carried out when penetrating into or withdrawing from a guide wire, the operation time is greatly gained, and the possible risks of the operation are reduced.
In this application, in the preliminary treatment, include, will on first dabber 1 is located to formation of image window pipe 2 covers, then locate 4 covers of pyrocondensation pipe on 2 pending one ends of formation of image window pipe and first dabber 1, then will overlap and be equipped with the formation of image window pipe 2 and the 1 section of first dabber of pyrocondensation pipe 4 heat, through pyrocondensation pipe 4 is heated the shrink and is conducted heat for formation of image window pipe 2 makes the formation of image window pipe 2 covers the internal diameter of the one end of pyrocondensation pipe 4 with the diameter of first dabber 1 is unanimous, removes pyrocondensation pipe 4 at last.
Adopt pyrocondensation pipe 4 and first dabber 1 to carry out the preliminary treatment to imaging window pipe 2 one end, the diameter that obtains imaging window pipe 2's one end is unanimous with distal end sign pipe 3 diameter, has guaranteed like this to dock accurately in the welding integration in-process, guarantees after the hot melt welding simultaneously that the butt joint department inner wall diameter is unanimous and smooth for OCT catheter point end can go on smoothly when penetrating or withdrawing from the seal wire, has won the operation time greatly and has reduced the risk that the operation probably exists.
The first mandrel 1 may have a hollow cylindrical tube structure.
In the present application, the length of the first mandrel 1 is not less than 2 times the length of the imaging window tube 2.
The length of the first mandrel 1 may be 2 times, 3 times, 4 times, 5 times and n times (n >2) the length of the imaging window tube 2.
In the present application, the imaging window tube 2 is made of a transparent block polyetheramide elastomer, the outer diameter of the imaging window tube 2 is 0.6 to 2mm, and the wall thickness of the imaging window tube 2 is 0.05 to 0.2 mm.
In the present application, the heat shrinkable tube 4 is made of a fluoropolymer resin, the outer diameter of the heat shrinkable tube 4 is 0.64 to 3mm, the shrinkage ratio of the heat shrinkable tube 4 is (1.4 to 2.5):1, and the shrinkage ratio of the heat shrinkable tube 4 is preferably 1.4: 1.
In the application, the imaging window tube 2 and the first mandrel 1 section which are sleeved with the heat shrinkable tube 4 are placed into a mold hole of a thermal welding machine for heating, the heating temperature is 190-.
In this application, among the welding integration, include, wear all to overlap imaging window pipe 2 and distal end sign pipe 3 after the preliminary treatment and locate on second dabber 5, distal end sign pipe 3 terminal surface with the terminal surface after imaging window pipe 2 handles meets, then distal end sign pipe 3 meets with imaging window pipe 2 department of meeting and overlaps and be equipped with pyrocondensation pipe 4, will overlap and be equipped with imaging window pipe 2 and distal end sign pipe 3 of pyrocondensation pipe 4 heat, through pyrocondensation pipe 4's shrink and heat transfer effect form a whole with distal end sign pipe 3 and imaging window pipe 2 hot melt welding, later remove pyrocondensation pipe 4, will weld imaging window pipe 2 after and distal end sign pipe 3 follow take off on the second dabber 5, the most advanced preparation of OCT pipe is accomplished.
The second mandrel 5 may be a hollow cylindrical tube structure.
In the present application, the diameter of the first mandrel 1 is the same as the inner diameter of the distal marker tube 3; the outer diameter of the far-end identification tube 3 is the same as that of the end part of the imaging window tube 2 after pretreatment.
In the present application, the diameter of the second mandrel 5 is smaller than the diameter of the distal marker tube 3.
In the application, the imaging window tube 2 and the far-end identification tube 3, on which the heat shrinkable tube 4 is sleeved, are placed in a mold hole of a heat welding machine for heating, wherein the heating temperature is 200-230 ℃, the heating time is 15-30s, the heating temperature is preferably 215 ℃, and the heating time is preferably 20 s.
In the present application, the distal marker tube 3 is made of a blue block polyether amide elastomer, the outer diameter of the distal marker tube 3 is 0.46 to 1.86mm, and the wall thickness of the distal marker tube 3 is 0.05 to 0.2 mm.
In the present application, in the welding integration, the heat shrinkable tube 4 completely covers the distal end identification tube 3, and the heat shrinkable tube 4 covers a part of the imaging window tube 2.
Example 1
Arranging an imaging window pipe on a first mandrel (the length of the first mandrel is 2 times of the length of the imaging window pipe), then arranging a heat-shrinkable pipe on one end to be processed of the imaging window pipe and the first mandrel, then arranging the imaging window pipe and a first mandrel section which are sleeved with the heat-shrinkable pipe in a hole of a mold of a heat welding machine for heating, wherein the heating temperature is 190 ℃, the heating time is 5s, the imaging window pipe is heated to shrink through the heat-shrinkable pipe and conducts heat to the imaging window pipe, the inner diameter of one end, provided with the heat-shrinkable pipe, of the imaging window pipe is consistent with the diameter of the first mandrel, and finally, the heat-shrinkable pipe and the first mandrel are removed.
Sleeving a pretreated imaging window tube and a far-end identification tube on a second mandrel, connecting the end face of the far-end identification tube with the pretreated end face of the imaging window tube, sleeving a heat-shrinkable tube at the joint of the far-end identification tube and the imaging window tube, placing the imaging window tube sleeved with the heat-shrinkable tube and the far-end identification tube in a mold hole of a heat welding machine for heating at 200 ℃ for 15s, carrying out heat fusion welding on the far-end identification tube and the imaging window tube to form a whole through the contraction and heat transfer action of the heat-shrinkable tube, removing the heat-shrinkable tube, taking the imaging window tube and the far-end identification tube which are subjected to heat fusion welding off the second mandrel, completing the manufacture of the tip end of the OCT catheter, enabling the joint of the imaging window tube and the far-end identification tube to be smooth, and enabling the end face of one end of the far-end identification tube, which is far away from the imaging window tube, to be smooth, details of the parameters are shown in table 1.
The first mandrel and the second mandrel are both of solid cylindrical structures, and the length of the first mandrel is the same as that of the second mandrel.
The diameter of the first mandrel is 0.4mm, and the diameter of the second mandrel is 0.35 mm. The internal diameter of one end of the imaging window tube after pretreatment is 0.4mm, the external diameter is 0.5mm, the internal diameter of the other end is 0.5mm, and the external diameter is 0.6 mm. The outer diameter of the heat shrinkable tube is 0.7 mm. The inner diameter of the far-end identification tube is 0.4mm, and the outer diameter of the far-end identification tube is 0.5 mm. After the welding integration process, the inner diameter of the far-end identification tube is 0.35mm, and the outer diameter is 0.45 mm. The imaging window pipe with the internal diameter of the one end that the distal end sign pipe meets is 0.35mm, and the external diameter is 0.45mm, keeps away from the internal diameter of distal end sign pipe one end is 0.5mm, and the external diameter is 0.6 mm.
The imaging window tube is made of a transparent block polyether amide elastomer (Pebax), the far-end identification tube is made of a blue block polyether amide elastomer (Pebax), the heat-shrinkable tube is made of fluoropolymer resin, and the shrinkage ratio of the heat-shrinkable tube is 1.4: 1.
Examples 2 to 10 and comparative examples 1 to 2 were different from example 1 in the pretreatment temperature and time and the temperature and time of weld integration, and specific parameters are shown in table 1.
Comparative example 3 is different from example 1 in that a heat shrinkable tube is not used in the welding-integration process of example 3, and specific parameters are shown in table 1.
Comparative example 4
Taking the imaging window tube and the far-end identifier which are the same as those in the embodiment 1, coating ultraviolet glue on the outer surface of the far-end identifier tube, sleeving the imaging window tube into the far-end identifier tube, overlapping the far-end identifier tube and the imaging window tube, and irradiating and curing the ultraviolet glue by using an ultraviolet lamp to obtain the tip of the OCT catheter, wherein the specific parameters are shown in the table 1.
Table 1 shows the parameters of the examples and the OCT catheter tip prepared in comparative examples
And (3) knotting: the OCT catheter tip prepared by the OCT catheter tip preparation method provided by the application has the advantages that the bonding position of the imaging window tube and the distal end identification tube is smooth, the hardness of the tip is low, the OCT catheter tip can be smoothly carried out when a guide wire is inserted into or withdrawn from the OCT catheter tip, the operation time is greatly saved, and the possible risks of the operation are reduced. And this application has given up the fixed distal end sign pipe of ultraviolet glue, has replaced the structure that imaging window pipe and distal end sign pipe overlapped mutually, and the terminal surface is melted into the disc by the tangent plane moreover to make sharp rigidity show the reduction, terminal surface slick and sly, safe and reliable, let OCT catheter point greatly reduced in the operation process probably cause the risk of harm to the blood vessel. In addition, the preparation method is simple, easy to operate, safe, reliable and capable of realizing batch production.
Although the embodiments of the present application have been described above with reference to the accompanying drawings, the present application is not limited to the above-described embodiments and application fields, and the above-described embodiments are illustrative, instructive, and not restrictive. Those skilled in the art, having the benefit of this disclosure, may effect numerous modifications thereto and changes may be made without departing from the scope of the invention as defined by the appended claims.
Claims (11)
1. A method for preparing an OCT catheter tip is characterized by comprising the following steps:
preprocessing, namely, thermally shrinking the diameter of one end of the imaging window tube to a preset value;
welding integration, namely welding the end part of the imaging window tube after being thermally contracted with a far-end identification tube into a whole;
in the pretreatment, the imaging window pipe is sleeved on a first mandrel, then a heat-shrinkable pipe is sleeved on one end to be treated of the imaging window pipe and the first mandrel, then the imaging window pipe sleeved with the heat-shrinkable pipe and the first mandrel section are heated, the heat-shrinkable temperature is 190-;
In the welding integration, the imaging window tube and the far-end identification tube which are preprocessed penetrate through and are sleeved on a second mandrel, the end face of the far-end identification tube is connected with the processed end face of the imaging window tube, then a heat-shrinkable tube is sleeved at the joint of the far-end identification tube and the imaging window tube, the imaging window tube and the far-end identification tube which are sleeved with the heat-shrinkable tube are heated, the heating temperature is 200-230 ℃, the heating time is 15-30s, the far-end identification tube and the imaging window tube are welded into a whole through the contraction and heat transfer effects of the heat-shrinkable tube, then the heat-shrinkable tube is removed, the imaging window tube and the far-end identification tube which are welded are taken down from the second mandrel, and the tip end of the OCT catheter is manufactured;
in the welding integration, the heat shrink tube completely covers the far-end identification tube, and the heat shrink tube covers part of the imaging window tube, so that the end face of the far-end identification tube is melted into a circular face from a tangent plane;
the imaging window tube is composed of a transparent block polyether amide elastomer;
the far-end identification tube is composed of a blue block polyether amide elastomer;
the wall thickness of the imaging window tube is 0.05-0.2 mm;
The wall thickness of the far-end marking tube is 0.05-0.2 mm.
2. The method of claim 1, wherein the length of the first mandrel is not less than 2 times the length of the imaging window tube.
3. The method of claim 2, wherein the outside diameter of the imaging window tube is 0.6-2 mm.
4. The method of claim 1, wherein the heat shrinkable tube is made of a fluoropolymer resin, and has an outer diameter of 0.64-3mm and a shrinkage ratio of (1.4-2.5): 1.
5. The method of claim 1, wherein the heat shrinkable tube is made of a fluoropolymer resin, and has an outer diameter of 0.64 to 3mm and a shrinkage ratio of 1.4: 1.
6. The method of claim 1, wherein the imaging window tube and the first mandrel segment with the heat shrinkable tube are placed in a thermowelder mold hole for heating at 200 ℃ for 10 s.
7. The method of claim 1, wherein the diameter of the first mandrel is the same as the inner diameter of the distal marker tube, and the outer diameter of the distal marker tube is the same as the outer diameter of the end of the imaging window tube after pretreatment.
8. The method of claim 1, wherein the diameter of the second mandrel is less than the diameter of the distal marker tube.
9. The method of claim 1, wherein the imaging window tube and the distal marker tube segment sleeved with the heat shrink tube are placed into a mold hole of a thermal welder for heating.
10. The method of claim 1, wherein the imaging window tube and the distal marker tube segment sleeved with the heat shrinkable tube are placed in a hole of a thermowelder mold and heated at 215 ℃ for 20 s.
11. The method of claim 1, wherein the outer diameter of the distal marker tube is 0.46-1.86 mm.
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| CN2019113563411 | 2019-12-25 | ||
| CN201911356341 | 2019-12-25 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102488955A (en) * | 2011-12-07 | 2012-06-13 | 湖南埃普特医疗器械有限公司 | Balloon guide catheter, and preparation method thereof |
| WO2014100211A1 (en) * | 2012-12-20 | 2014-06-26 | Volcano Corporation | Distal catheter tip formation |
| CN105147336A (en) * | 2015-10-28 | 2015-12-16 | 上海爱声生物医疗科技有限公司 | Intravascular ultrasound catheter and rapid forming method thereof |
| CN208511683U (en) * | 2018-03-29 | 2019-02-19 | 苏州恒瑞迪生医疗科技有限公司 | A kind of microtubular |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010063648A (en) * | 2008-09-11 | 2010-03-25 | Nippon Sherwood Medical Industries Ltd | Distal-end flexible medical tube |
| US20160114130A1 (en) * | 2014-10-24 | 2016-04-28 | Boston Scientific Scimed, Inc. | Medical device including a marker element |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102488955A (en) * | 2011-12-07 | 2012-06-13 | 湖南埃普特医疗器械有限公司 | Balloon guide catheter, and preparation method thereof |
| WO2014100211A1 (en) * | 2012-12-20 | 2014-06-26 | Volcano Corporation | Distal catheter tip formation |
| CN105147336A (en) * | 2015-10-28 | 2015-12-16 | 上海爱声生物医疗科技有限公司 | Intravascular ultrasound catheter and rapid forming method thereof |
| CN208511683U (en) * | 2018-03-29 | 2019-02-19 | 苏州恒瑞迪生医疗科技有限公司 | A kind of microtubular |
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