CN112842617A - Processing technology of film type embolism filter screen - Google Patents
Processing technology of film type embolism filter screen Download PDFInfo
- Publication number
- CN112842617A CN112842617A CN202110061917.2A CN202110061917A CN112842617A CN 112842617 A CN112842617 A CN 112842617A CN 202110061917 A CN202110061917 A CN 202110061917A CN 112842617 A CN112842617 A CN 112842617A
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- Prior art keywords
- filter screen
- film
- fan
- framework
- shaped film
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/01—Filters implantable into blood vessels
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/01—Filters implantable into blood vessels
- A61F2002/016—Filters implantable into blood vessels made from wire-like elements
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2240/00—Manufacturing or designing of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2240/001—Designing or manufacturing processes
Abstract
The invention relates to a processing technology of a film type embolism filter screen, which comprises the steps of manufacturing a non-closed circular metal filter screen framework; manufacturing a metal reed winding pipe for enhancing the developing effect; sleeving the spring winding pipe on a circular ring structure of the filter screen framework, and then utilizing a heat shrink pipe to heat-shrink and fix the unclosed part of the filter screen framework so as to form a complete filter screen framework; selecting a polymer film according to the size of the filter screen framework, and cutting the polymer film into a fan shape with an adaptive size; uniformly punching holes on the surface of the fan-shaped film; symmetrically folding the fan-shaped film, and overlapping and thermally welding and fixing two sides of the fan-shaped film to form a conical funnel-shaped film filter screen; and (3) turning the edge of the conical opening end of the film filter screen from outside to inside to wrap the reed winding pipe, and bonding and fixing the edge and the film filter screen through glue. The advantages are that: the manufactured finished filter screen can effectively capture scraps or emboli in blood vessels, and the filter screen cannot cause artificial embolism due to redundancy after being released; the contracted filter screen can not be deformed.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a processing technology of a film type embolism filter screen.
Background
The human blood contains a coagulation system and an anticoagulation system. Under normal conditions, the two keep dynamic balance to ensure the normal flow of blood in blood vessels, and thrombus can not be formed, and under special conditions, such as the blood vessels are injured due to sclerosis, stenosis and the like, and the blood is sticky, the balance can be broken, so that people are in a 'thrombus-prone state'. The thrombus can not flow in the artery vessel regularly, and the thrombus can flow to any part of the human body along with the blood flowing in the artery vessel. If the cerebral arterial blood vessel stays in the cerebral arterial blood vessel, the cerebral arterial blood is prevented from flowing normally, namely cerebral thrombosis, so that ischemic stroke attack is caused. When coronary artery blood vessels of the heart are clogged, myocardial infarction is induced, and there are lower limb arterial thrombosis, lower limb deep vein thrombosis, pulmonary embolism and the like.
With the social development, the incidence of vascular occlusive diseases (thrombosis) such as arteriosclerosis and stenosis has been increasing in the medical field due to the influence of factors such as unhealthy eating habits and high working pressure caused by the aging of the population and the improvement of physical life.
Thrombosis, which is a serious symptom in most cases, such as hemiplegia and aphasia caused by cerebral infarction; severe precordial angina caused by myocardial infarction and severe chest pain, dyspnea, hemoptysis and other symptoms caused by pulmonary infarction; thrombosis of the lower limbs can cause pain in both legs, or a feeling of coolness and intermittent claudication. More severe cardiac, cerebral and pulmonary infarctions can also trigger sudden death.
The common thrombus filtering/taking-out device has simple structural design and convenient use, but has the following problems: firstly, the fallen fragments and micro thrombus cannot be completely collected; ② there is a risk of causing secondary distal embolism.
The thrombus filtering devices are generally: the metal framework and the film are formed, the film adopts a spraying technology, and the process of spraying the film is very harsh and needs a plurality of processing steps. If the film is punched after being formed, a special laser-beam drilling machine (the requirement on equipment is very high) is needed, and the hole is punched on the three-dimensional film structure, so that the uniformity and the shape of the size of the hole diameter are difficult to ensure, and even burrs, fins, fusing and the like can be caused.
In order to solve the above problems, the applicant has designed and developed a "funnel-shaped" thrombus filtering device using a special folding for capturing and removing thrombus and impurities in the body.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a processing technology of a film type embolism filter screen, which effectively overcomes the defects of the prior art.
The technical scheme for solving the technical problems is as follows:
a processing technology of a film type embolism filter screen comprises the following steps:
firstly, manufacturing a non-closed circular metal filter screen framework;
step two, manufacturing a metal reed pipe for enhancing the development effect;
sleeving the spring winding pipe on a circular ring structure of the filter screen framework, and then utilizing a heat-shrinkable pipe to thermally shrink and fix the unclosed part of the filter screen framework so as to form a complete filter screen framework;
selecting a polymer film according to the size of the filter screen framework, and cutting the polymer film into a fan shape with an adaptive size;
fifthly, uniformly punching holes on the surface of the fan-shaped film;
step six, symmetrically folding the fan-shaped film, and overlapping and thermally welding and fixing two sides of the fan-shaped film to form a conical funnel-shaped film filter screen;
and step seven, the edge of the conical opening end of the film filter screen is rolled from outside to inside to wrap the reed pipe, and the edge of the reed pipe and the film filter screen are bonded and fixed through glue.
On the basis of the technical scheme, the invention can be further improved as follows.
Furthermore, the filter screen framework is formed by weaving nickel-titanium alloy wires.
Further, the developing coil spring tube is made of platinum-iridium alloy, tantalum or other metals for enhancing the developing performance of X-ray transmission lines.
Further, the polymer film is a medical polyurethane film.
Further, in the sixth step, the thermal welding temperature is 60-65 ℃ and the time is 40-60 s.
The invention has the beneficial effects that: the filter screen finished product can effectively capture scraps or emboli in blood vessels and remove the scraps or emboli out of the body, and after the filter screen is fully released in the blood vessels, the filter screen cannot cause artificial embolism due to redundancy; impurities or emboli are collected in the filter screen pocket, and the filter screen is not deformed when being contracted.
Drawings
FIG. 1 is a schematic structural diagram of a membrane filter in the membrane type embolic filter processing process of the present invention.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
Examples
The processing technology of the membrane type embolism filter screen of the embodiment comprises the following steps:
firstly, manufacturing a non-closed circular metal filter screen framework;
step two, manufacturing a metal reed pipe for enhancing the development effect;
sleeving the spring winding pipe on a circular ring structure of the filter screen framework, and then utilizing a heat-shrinkable pipe to thermally shrink and fix the unclosed part of the filter screen framework so as to form a complete filter screen framework;
selecting a polymer film according to the size of the filter screen framework, and cutting the polymer film into a fan shape with an adaptive size;
fifthly, uniformly punching holes on the surface of the fan-shaped film;
step six, symmetrically folding the fan-shaped film, and overlapping and thermally welding and fixing two sides of the fan-shaped film to form a conical funnel-shaped film filter screen, wherein the thermal welding temperature is 60-65 ℃, and the duration is 40-60 s;
and step seven, the edge of the conical opening end of the film filter screen is rolled from outside to inside to wrap the reed pipe, and the edge of the reed pipe and the film filter screen are bonded and fixed through glue.
In this embodiment, the surface of the fan-shaped film is uniformly perforated, and this operation is performed by laser drilling.
Also, special attention is paid to: the filtering holes are not opened within the range of 1-2cm from the edge of the fan-shaped film close to the arc (namely the opening edge after the film filter screen is formed) to the center point of the fan-shaped film.
It should be noted that: the fan-shaped film is just one example, and may be cut into films of other shapes (not necessarily conical filter pockets, but also other non-standard shapes of filter screens), and then folded to form film filter screen members of other shapes.
Preferably, the filter screen framework is formed by weaving nickel-titanium alloy wires.
The unclosed part of the filter screen framework can be firmly fixed through riveting or bonding.
Preferably, the developing coil spring is made of platinum-iridium alloy, tantalum or other radiopaque metals.
In the sixth step, the two sides of the fan-shaped film can be fixed by ultrasonic welding or laser welding after being overlapped.
In the seventh step, the edges of the film and the body thereof can be fixed to each other by thermal welding, ultrasonic welding or laser welding after wrapping.
Preferably, the polymer film is a medical polyurethane film.
The filter screen structure prepared by the process of the embodiment is shown in fig. 1, can effectively capture scraps or emboli in blood vessels in clinical experiments and remove the scraps or emboli out of the bodies of the blood vessels, and after the filter screen is fully released in the blood vessels, the filter screen can not cause artificial embolism due to redundancy; impurities or emboli are collected in the net bag of the film filter screen, and the contracted filter screen can not deform.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. A processing technology of a film type embolism filter screen is characterized by comprising the following steps:
firstly, manufacturing a non-closed circular metal filter screen framework;
step two, manufacturing a metal reed pipe for enhancing the development effect;
sleeving the spring winding pipe on a circular ring structure of the filter screen framework, and then utilizing a heat-shrinkable pipe to thermally shrink and fix the unclosed part of the filter screen framework so as to form a complete filter screen framework;
selecting a polymer film according to the size of the filter screen framework, and cutting the polymer film into a fan shape with an adaptive size;
fifthly, uniformly punching holes on the surface of the fan-shaped film;
step six, symmetrically folding the fan-shaped film, and overlapping and thermally welding and fixing two sides of the fan-shaped film to form a conical funnel-shaped film filter screen;
and step seven, the edge of the conical opening end of the film filter screen is rolled from outside to inside to wrap the reed pipe, and the edge of the reed pipe and the film filter screen are bonded and fixed through glue.
2. The process of claim 1 wherein the membrane type embolic filter is: the filter screen framework is formed by weaving nickel-titanium alloy wires.
3. The process of claim 1 wherein the membrane type embolic filter is: the developing coil spring tube is made of platinum-iridium alloy, tantalum or other metals for enhancing the developing performance of X-ray transmission lines.
4. A process according to any one of claims 1 to 3, wherein: the polymer film is a medical polyurethane film.
5. The temperature according to any one of claims 1 to 3: a processing technology of a film type embolism filter screen is characterized in that: in the sixth step, the thermal welding temperature is 60-65 ℃ and the time is 40-60 s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110061917.2A CN112842617A (en) | 2021-01-18 | 2021-01-18 | Processing technology of film type embolism filter screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110061917.2A CN112842617A (en) | 2021-01-18 | 2021-01-18 | Processing technology of film type embolism filter screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112842617A true CN112842617A (en) | 2021-05-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110061917.2A Pending CN112842617A (en) | 2021-01-18 | 2021-01-18 | Processing technology of film type embolism filter screen |
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| Country | Link |
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| CN (1) | CN112842617A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040225321A1 (en) * | 2003-05-07 | 2004-11-11 | Scimed Life Systems, Inc. | Filter membrane with increased surface area |
| CN105455878A (en) * | 2016-01-26 | 2016-04-06 | 加奇生物科技（上海）有限公司苏州分公司 | Catching device |
-
2021
- 2021-01-18 CN CN202110061917.2A patent/CN112842617A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040225321A1 (en) * | 2003-05-07 | 2004-11-11 | Scimed Life Systems, Inc. | Filter membrane with increased surface area |
| CN105455878A (en) * | 2016-01-26 | 2016-04-06 | 加奇生物科技（上海）有限公司苏州分公司 | Catching device |
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