CN117504089A - medical catheter - Google Patents
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- CN117504089A CN117504089A CN202210900598.4A CN202210900598A CN117504089A CN 117504089 A CN117504089 A CN 117504089A CN 202210900598 A CN202210900598 A CN 202210900598A CN 117504089 A CN117504089 A CN 117504089A
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- 230000003014 reinforcing effect Effects 0.000 claims abstract description 101
- 239000011148 porous material Substances 0.000 claims abstract description 13
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- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000002654 heat shrinkable material Substances 0.000 claims description 3
- 239000012943 hotmelt Substances 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 9
- 238000013461 design Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 5
- 230000036314 physical performance Effects 0.000 abstract description 4
- 210000004204 blood vessel Anatomy 0.000 description 5
- 239000004677 Nylon Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 4
- 238000007917 intracranial administration Methods 0.000 description 4
- 229920001778 nylon Polymers 0.000 description 4
- 230000000704 physical effect Effects 0.000 description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 description 3
- 239000004814 polyurethane Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000002560 therapeutic procedure Methods 0.000 description 3
- 229920002614 Polyether block amide Polymers 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
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- 239000000806 elastomer Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- WAIPAZQMEIHHTJ-UHFFFAOYSA-N [Cr].[Co] Chemical class [Cr].[Co] WAIPAZQMEIHHTJ-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
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- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000013152 interventional procedure Methods 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 210000005036 nerve Anatomy 0.000 description 1
- 229910001000 nickel titanium Inorganic materials 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
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- 229920000570 polyether Polymers 0.000 description 1
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- 229920000098 polyolefin Polymers 0.000 description 1
- 229920006124 polyolefin elastomer Polymers 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/0043—Catheters; Hollow probes characterised by structural features
- A61M25/0045—Catheters; Hollow probes characterised by structural features multi-layered, e.g. coated
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biophysics (AREA)
- Pulmonology (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
The present invention provides a medical catheter comprising: an outer layer and a reinforcing layer; the reinforcing layer has pores through which the outer layer penetrates and wraps the reinforcing layer to be fitted with each other, and a radial position of the reinforcing layer is defined by the outer layer. So configured, by defining the radial position of the reinforcing layer in the outer layer, the stability of the catheter in the process is improved; meanwhile, on the basis of not affecting the physical performance and clinical safety of the catheter, the wall thickness of the catheter is reduced, and the design of large wall and thin cavity is achieved.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a medical catheter.
Background
Interventional therapy is currently a popular treatment for many diseases because of its small surgical side effects compared to traditional surgical therapies. In all interventional procedures, the medical catheter is the foundation stone for which the procedure was successfully performed. Which serves as a pathway in surgery to enable a physician to deliver a particular medical device to a designated location and to treat a patient.
Taking intracranial nerve interventional therapy as an example, the characteristics of intracranial blood vessels determine that a medical catheter serving the intracranial blood vessels needs to be provided with a soft head end so as to avoid damaging the intracranial blood vessels; existing catheters generally have three layers of inner, reinforcing and outer layers, and factors affecting the softness of the catheter are: the hardness of the inner layer, the strength of the reinforcing layer wire material, the covering density and the strength of the outer layer; meanwhile, according to the existing clinical feedback analysis, a doctor prefers to use a catheter with a large inner cavity and a small wall thickness in an interventional operation, so that the doctor can convey a large-size medical instrument to treat by utilizing the inner cavity of the catheter under the condition that the outer diameter of the catheter is limited by the blood vessel size of a patient in the clinical operation process, and in addition, the conveying performance of the medical instrument in the catheter can be optimized by the design of the large inner cavity.
In summary, the medical catheter needs to have the following characteristics: (1) having a soft head end; (2) the cavity is large-wall thin. Catheters currently on the market are designed to have extremely large lumen space and extremely thin wall thickness under vessel specification limitations in order to meet the clinical needs of doctors. The extremely thin wall thickness results in poor physical support of the catheter itself and is extremely pliable, while the reinforcing layer of the coil structure results in a low peak tensile test value of the catheter itself, which in turn results in a clinically significant number of distal fracture events. This presents a significant challenge to the manufacturing process of the product, as well as to the quality of the finished product.
Disclosure of Invention
The invention aims to provide a medical catheter, which solves the problems that the existing catheter cannot simultaneously meet the requirements of a large-wall thin structure and good physical properties of a cavity, and solves the problem that the instability of a processing technology in the prior art affects the quality of a finished product.
In order to achieve the above object, the present invention provides a medical catheter comprising: an outer layer and a reinforcing layer;
the reinforcing layer has pores through which the outer layer penetrates and wraps the reinforcing layer to be fitted with each other, and a radial position of the reinforcing layer is defined by the outer layer.
Optionally, the ratio of the first thickness of the reinforcing layer in the radial direction to the second thickness of the outer layer in the radial direction is 0.2 to 0.9.
Optionally, the ratio of the first thickness of the reinforcing layer in the radial direction to the second thickness of the outer layer in the radial direction is 0.35-0.9.
Optionally, the ratio of the first thickness of the reinforcing layer in the radial direction to the second thickness of the outer layer in the radial direction is 0.5 to 0.75.
Optionally, the inner edge of the reinforcing layer is flush with the inner surface of the outer layer.
Optionally, the radial distance of the inner edge of the reinforcing layer from the inner surface of the outer layer is greater than 0.
Optionally, the radial distance between the central line of the thickness of the reinforcing layer in the radial direction and the inner surface of the outer layer is Y, the second thickness of the outer layer in the radial direction is L, and the first thickness of the reinforcing layer in the radial direction is 2D, so that D/L is less than or equal to Y/L <0.86.
Optionally, Y/L is more than or equal to 0.35 and less than or equal to 0.65.
Optionally, Y/L is more than or equal to 0.49 and less than or equal to 0.51.
Optionally, the outer layer penetrates through the pores and encapsulates the reinforcing layer after being hot-melted.
Optionally, the reinforcement layer includes any one of a braided structure, a coil, or a cut tube.
Optionally, the medical catheter further comprises an inner layer, an outer surface of the inner layer abutting an inner surface of the outer layer.
Optionally, the medical catheter further comprises a film layer, wherein the film layer is coated on the outer surface of the outer layer, and inward extrusion force is applied to the outer layer, so that the inner surface of the outer layer is attached to the outer surface of the inner layer.
Optionally, the medical catheter uses a film layer in the preparation process, the film layer is coated on the outer surface of the outer layer, and inward extrusion force is applied to the outer layer, so that the inner surface of the outer layer is attached to the outer surface of the inner layer, and the film layer is removed after the preparation is completed.
Optionally, the outer layer is made of a hot-melt material; the film layer is made of a heat-shrinkable material.
In summary, the present invention provides a medical catheter, comprising: an outer layer and a reinforcing layer; the reinforcing layer has pores through which the outer layer penetrates and wraps the reinforcing layer to be fitted with each other, and a radial position of the reinforcing layer is defined by the outer layer.
So configured, by defining the radial position of the reinforcing layer in the outer layer, the stability of the catheter in the process is improved; meanwhile, on the basis of not affecting the physical performance and clinical safety of the catheter, the wall thickness of the catheter is reduced, and the design of large wall and thin cavity is achieved.
Drawings
FIG. 1 is a schematic view of a medical catheter according to an embodiment of the present invention;
FIG. 2 is a schematic view of another embodiment of a medical catheter according to the present invention;
FIG. 3 is a schematic view showing the ratio of the thickness of the reinforcing layer to the thickness of the outer layer in the embodiment of the present invention when the ratio exceeds the thickness ratio range;
FIG. 4 is a schematic diagram of an embodiment of the present invention when the Y/L exceeds the position scale range;
FIG. 5 is a schematic diagram of an embodiment of the present invention when the Y/L is below the position scale range.
Wherein, each reference sign is explained as follows:
11-an outer layer; 12-a reinforcing layer; 13-inner layer.
Detailed Description
The invention will be described in further detail with reference to the drawings and the specific embodiments thereof in order to make the objects, advantages and features of the invention more apparent. It should be noted that the drawings are in a very simplified form and are not drawn to scale, merely for convenience and clarity in aiding in the description of embodiments of the invention. Furthermore, the structures shown in the drawings are often part of actual structures. In particular, the drawings are shown with different emphasis instead being placed upon illustrating the various embodiments.
As used in this specification, the singular forms "a," "an," and "the" include plural referents, the term "or" is generally used in the sense of comprising "and/or" and the term "several" is generally used in the sense of comprising "at least one," the term "at least two" is generally used in the sense of comprising "two or more," and the term "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying any relative importance or number of technical features indicated. Thus, features defining "first," "second," "third," and "third" may include one or at least two such features, either explicitly or implicitly, "one end" and "another end" and "proximal" and "distal" generally refer to the corresponding two portions, including not only the endpoints, where "proximal" generally represents the direction of approach to the physician during the procedure and "distal" generally represents the direction of approach to the lesion during the procedure. The terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. Furthermore, as used in this specification, an element disposed on another element generally only means that there is a connection, coupling, cooperation or transmission between the two elements, and the connection, coupling, cooperation or transmission between the two elements may be direct or indirect through intermediate elements, and should not be construed as indicating or implying any spatial positional relationship between the two elements, i.e., an element may be in any orientation, such as inside, outside, above, below or on one side of the other element unless the context clearly indicates otherwise. The terms "upper", "lower", "top" and "bottom" are generally relative positional relationships arranged in the direction of gravity; the term "vertical, vertical direction" generally refers to a direction along the force of gravity that is generally perpendicular to the ground, and "horizontal, horizontal direction" generally refers to a direction parallel to the ground; the specific meaning of the above terms in this specification will be understood by those of ordinary skill in the art in view of the specific circumstances.
The invention aims to provide a medical catheter, which solves the problems that the existing catheter cannot simultaneously meet the requirements of a large-wall thin structure and good physical properties of a cavity, and solves the problem that the instability of a processing technology in the prior art affects the quality of a finished product.
The following description refers to the accompanying drawings.
Referring to fig. 1-2, the present invention provides a medical catheter, comprising: an outer layer 11 and a reinforcing layer 12; the reinforcing layer 12 has pores through which the outer layer 11 penetrates and wraps the reinforcing layer 12 to be fitted to each other, and the radial position of the reinforcing layer 12 is defined by the outer layer 11. In the example shown in fig. 1 to 5, the radial direction is the up-down direction, and the axial direction is the left-right direction. The outer layer 11 penetrates through the pores and wraps the reinforcing layer 12 to form a mutually embedded structure, in the same catheter, the inner side edge of the reinforcing layer 12 can be flush with the inner surface of the outer layer 11, a certain radial distance can also be formed between the inner side edge of the reinforcing layer 12 and the inner surface of the outer layer 11, the radial position of the reinforcing layer 12 is limited by the embedded structure formed by the penetration of the outer layer 11 through the pores and wrapping, and wires in the reinforcing layer 12 do not extend in the axial direction of the outer layer 11, but extend in the direction with an included angle with the axial direction of the outer layer 11. The position ratio of the reinforcing layer 12 in the outer layer 11 and the thickness ratio of the reinforcing layer 12 and the outer layer 11 in the radial direction are controlled to solve the problems of wire leakage and the like in the production process of the catheter, so that the stability of the production process of the catheter is improved, and meanwhile, the design effect of large wall thickness of a catheter cavity is met on the premise that the physical performance and clinical safety of the catheter are not affected, and the catheter simultaneously meets the large wall thickness of the cavity and good physical properties.
As an alternative embodiment, the ratio of the first thickness of the reinforcing layer 12 in the radial direction to the second thickness of the outer layer 11 in the radial direction is 0.2 to 0.9, wherein the first thickness refers to the distance between the outer surface and the inner surface of the reinforcing layer 12, and the second thickness refers to the distance between the outer surface and the inner surface of the outer layer 11. Further, when the first thickness of the reinforcing layer 12 in the radial direction and the second thickness of the outer layer 11 in the radial direction are both small, the thickness ratio can be adjusted to be in the range of 0.35 to 0.9. Further, when the first thickness of the reinforcing layer 12 in the radial direction and the second thickness of the outer layer 11 in the radial direction are both large, the thickness ratio can be adjusted to be in the range of 0.5 to 0.75. It should be noted that the thickness ratio range is affected by the materials of the outer layer 11 and the reinforcing layer 12, and different materials are adapted to different thickness ratio ranges, but it is required that when the thickness ratio range is within the above thickness ratio range, the reinforcing layer 12 is not easy to leak wires and can balance softness and support better.
Referring to fig. 1 and 3, the inner edge of the reinforcing layer 12 is flush with the inner surface of the outer layer 11 and the outer surface of the inner layer 13. In the example shown in fig. 1, the inner surface of the outer layer 11 abuts against the outer surface of the inner layer 13, the inner edge of the reinforcing layer 12 is flush with the inner surface of the outer layer 11, meanwhile, the inner edge of the reinforcing layer 12 and the outer surface of the inner layer 13 are also on the same plane, and the ratio of the first thickness of the reinforcing layer 12 in the radial direction to the second thickness of the outer layer 11 in the radial direction is in a proper ratio range, so that unqualified phenomena such as yarn leakage and the like of the reinforcing layer 12 cannot occur; in the example shown in fig. 3, the ratio of the first thickness of the reinforcing layer 12 in the radial direction to the second thickness of the outer layer 11 in the radial direction is 0.95, and when the ratio exceeds the upper limit value of the thickness ratio range, all the materials of the outer layer 11 penetrate through the pores of the reinforcing layer 12 in the processing process, so that a part of the reinforcing layer 12 is exposed out of the outer surface of the outer layer 11, and unacceptable phenomena such as silk leakage and the like occur, and meanwhile, the thickness ratio of the reinforcing layer 12 is too large, so that the flexibility of the catheter is insufficient and the blood vessel is easy to be scratched or scratched; in other embodiments, the ratio of the first thickness of the reinforcing layer 12 in the radial direction to the second thickness of the outer layer 11 in the radial direction is 0.1, which is lower than the lower limit of the thickness ratio range, results in insufficient support and collapse resistance of the catheter as a whole, and is easily retracted or collapsed during delivery and treatment.
Referring to fig. 2, the radial distance between the inner edge of the reinforcing layer 12 and the inner surface of the outer layer 11 is greater than 0. It should be noted that, whether the inner edge of the reinforcing layer 12 is flush with the inner surface of the outer layer 11 or the radial distance is greater than 0, the ratio of the first thickness of the reinforcing layer 12 in the radial direction to the second thickness of the outer layer 11 in the radial direction needs to be in the range of 0.2 to 0.9.
Referring to fig. 2 and fig. 4 to 5, the radial distance between the center line of the thickness of the reinforcing layer 12 in the radial direction and the inner surface of the outer layer 11 is Y, the second thickness of the outer layer 11 in the radial direction is L, and the first thickness of the reinforcing layer 12 in the radial direction is 2D, so D/L is less than or equal to Y/L <0.86. The thickness centerline of the reinforcing layer 12 in the radial direction is defined as the radial distance from the point on the thickness centerline to the inner side edge of the reinforcing layer 12 and the radial distance from the outer side edge of the reinforcing layer 12 are equal. In the example shown in fig. 1, D/l=y/L, that is, when the inner edge of the reinforcing layer 12 is flush with the inner surface of the outer layer 11, the ratio of the radial distance from the thickness centerline of the reinforcing layer 12 in the radial direction to the inner surface of the outer layer 11 to the second thickness of the outer layer 11 in the radial direction is also within a suitable range of positional ratios; meanwhile, in the examples of fig. 2 and fig. 4 to 5, the ratio of the first thickness of the reinforcing layer 12 in the radial direction to the second thickness of the outer layer 11 in the radial direction is in the range of 0.2 to 0.9. In the example shown in fig. 4, Y/L exceeds the upper limit value of the position ratio range, which results in that a part of the reinforcing layer 12 is exposed outside the outer surface of the outer layer 11, and a failure phenomenon such as yarn leakage is caused; in the example shown in fig. 5, Y/L is lower than the lower limit value of the position ratio range, causing the inner edge of the reinforcing layer 12 to be located outside the inner surface of the outer layer 11, and the portion of the inner edge of the reinforcing layer 12 beyond the inner surface of the outer layer 11 is free from the filling of the outer layer 11 material in consideration of the influence of the fluidity of the outer layer 11 material, thereby increasing the wall thickness of the catheter and failing to achieve the design effect of the large wall thickness of the lumen.
Further, when both 2D and L are small, that is, the first thickness of the reinforcing layer 12 in the radial direction and the second thickness of the outer layer 11 in the radial direction are small, for example, when the reinforcing layer 12 having a thickness of 0.001 inch needs to be incorporated into the outer layer 11 having a thickness of 0.002 inch, the ratio of the radial distance Y from the center line of the thickness of the reinforcing layer 12 in the radial direction to the inner surface of the outer layer 11 to the second thickness L of the outer layer 11 in the radial direction should be controlled within the range of 0.35 to 0.65; further, when both 2D and L are large, that is, the first thickness of the reinforcing layer 12 in the radial direction and the second thickness of the outer layer 11 in the radial direction are large, for example, when the reinforcing layer 12 having a thickness of 0.0045 inches needs to be incorporated into the outer layer 11 having a thickness of 0.005 inches, the ratio of the radial distance Y from the center line of the thickness of the reinforcing layer 12 in the radial direction to the inner surface of the outer layer 11 to the second thickness L of the outer layer 11 in the radial direction should be controlled within the range of 0.49 to 0.51. It should be noted that the position ratio range is affected by the materials and thicknesses of the outer layer 11 and the reinforcing layer 12, and different materials and thicknesses are adapted to different position ratio ranges, but it is required to satisfy that when the position ratio range is located, the reinforcing layer 12 is not easy to leak wires and can achieve the technical effects of large wall thickness of the catheter lumen.
As an alternative embodiment, the outer layer 11 penetrates the pores and encapsulates the reinforcing layer 12 after being heat-fused. So configured, the outer layer 11 flows into the pores of the reinforcing layer 12 and is wrapped to form a mutually embedded structure after being heated and melted. It should be noted that, in some other embodiments, the structure of the outer layer 11 and the reinforcing layer 12 that are mutually embedded may be implemented by a method such as condensation shrinkage or chemical agent soaking, and the present invention is not limited thereto, and those skilled in the art can configure this according to practical situations.
As a preferred embodiment, the reinforcing layer 12 comprises any one of a woven structure, a coil, or a cut tube. The reinforcing layer 12 is a braided structure, coil or cut tube made of one or more filiform materials of stainless steel, nickel titanium alloy, cobalt chromium alloy, high polymer, and the first thickness of the reinforcing layer 12 in the radial direction may vary in the range of 0.001 to 0.0045 inches, taking into account the material and structure. Of course, in some other examples, the material and structure of the reinforcing layer 12 may be other reasonable forms, and those skilled in the art may choose suitable materials and structures according to practical situations, which the present invention is not limited to.
Referring to fig. 1 to 5, the medical catheter further comprises an inner layer 13, and an outer surface of the inner layer 13 abuts against an inner surface of the outer layer 11. The inner layer 13 is made of one or more materials selected from nylon elastomer Pebax, nylon, polyurethane PU, polytetrafluoroethylene PTFE, high density polyethylene HDPE, nylon elastomer Pebax mixed with an additive for reducing friction coefficient, polyolefin elastomer, etc., and the person skilled in the art can select the material adapted according to different uses of the catheter, which is not limited in the present invention.
Further, the medical catheter further comprises a film layer, wherein the film layer is coated on the outer surface of the outer layer 11, and inward extrusion force is applied to the outer layer 11, so that the inner surface of the outer layer 11 is attached to the outer surface of the inner layer 13. So configured, the film layer coated on the outer surface of the outer layer 11 is shrunk by heat, and applies inward extrusion force to the outer layer 11, so that the inner surface of the outer layer 11 is attached to the outer surface of the inner layer 13; at the same time, the outer layer 11 melts when it is heated and penetrates the pores of the reinforcing layer 12 to form a mutually embedded structure. In the examples shown in fig. 1 to 5, the film layer is not shown, and it will be understood by those skilled in the art that the film layer is a film-like structure that is wrapped around the outer surface of the outer layer 11 and has a heat-shrinkable property.
As an alternative embodiment, the membrane layer may be removed after the medical catheter is manufactured; in other embodiments, the film layer may also remain on the outer surface of the medical catheter as part of the medical catheter after the medical catheter is manufactured. The film layer can be configured by those skilled in the art according to practical situations, and the present invention is not limited thereto.
As an alternative example, the outer layer 11 is made of a hot-melt material; the film layer is made of a heat-shrinkable material. The outer layer 11 is made of one or more of polyether block polyamide, nylon, polytetrafluoroethylene, polyolefin, polyurethane and other materials with hot melting characteristics, and the second thickness of the outer layer 11 in the radial direction varies between 0.002 and 0.005 inch in consideration of the difference of the materials; the film layer is made of a pipe material with heat shrinkage characteristics. In other examples, the outer layer 11 and the film layer may be made of other materials having the same characteristics, and those skilled in the art may configure this according to the actual situation, which is not limited by the present invention.
In summary, the present invention provides a medical catheter comprising: an outer layer and a reinforcing layer; the reinforcing layer has pores through which the outer layer penetrates and wraps the reinforcing layer to be fitted with each other, and a radial position of the reinforcing layer is defined by the outer layer.
So configured, by defining the radial position of the reinforcing layer in the outer layer, the stability of the catheter in the process is improved; meanwhile, on the basis of not affecting the physical performance and clinical safety of the catheter, the wall thickness of the catheter is reduced, and the design of large wall and thin cavity is achieved.
The above description is only illustrative of the preferred embodiments of the present invention and is not intended to limit the scope of the present invention, and any alterations and modifications made by those skilled in the art based on the above disclosure shall fall within the scope of the appended claims.
Claims (15)
1. A medical catheter, comprising: an outer layer and a reinforcing layer;
the reinforcing layer has pores through which the outer layer penetrates and wraps the reinforcing layer to be fitted with each other, and a radial position of the reinforcing layer is defined by the outer layer.
2. The medical catheter of claim 1, wherein a ratio of a first thickness of the reinforcing layer in a radial direction to a second thickness of the outer layer in a radial direction is 0.2 to 0.9.
3. The medical catheter of claim 2, wherein a ratio of a first thickness of the reinforcing layer in a radial direction to a second thickness of the outer layer in a radial direction is 0.35 to 0.9.
4. The medical catheter of claim 2, wherein a ratio of a first thickness of the reinforcing layer in a radial direction to a second thickness of the outer layer in a radial direction is 0.5 to 0.75.
5. The medical catheter of claim 1, wherein an inner edge of the reinforcing layer is flush with an inner surface of the outer layer.
6. The medical catheter of claim 1, wherein the inner edge of the reinforcing layer is radially spaced from the inner surface of the outer layer by a distance greater than 0.
7. The medical catheter of claim 6, wherein a radial distance between a centerline of a thickness of the reinforcing layer in a radial direction and an inner surface of the outer layer is Y, a second thickness of the outer layer in a radial direction is L, and a first thickness of the reinforcing layer in a radial direction is 2D, such that D/L is less than or equal to Y/L <0.86.
8. The medical catheter of claim 7, wherein 0.35 +.y/L +.0.65.
9. The medical catheter of claim 7, wherein 0.49 +.y/L +.0.51.
10. The medical catheter of claim 1, wherein the outer layer penetrates the aperture and encapsulates the reinforcing layer after being heat fused.
11. The medical catheter of claim 1, wherein the reinforcement layer comprises any one of a braided structure, a coil, or a cut tube.
12. The medical catheter of claim 1, further comprising an inner layer, an outer surface of the inner layer abutting an inner surface of the outer layer.
13. The medical catheter of claim 12, further comprising a film layer that wraps around the outer surface of the outer layer and applies an inward compressive force to the outer layer to conform the inner surface of the outer layer to the outer surface of the inner layer.
14. The medical catheter of claim 12, wherein the medical catheter is manufactured using a film layer that is wrapped around the outer surface of the outer layer and applies an inward compressive force to the outer layer to conform the inner surface of the outer layer to the outer surface of the inner layer, and wherein the film layer is removed after the manufacturing process is completed.
15. The medical catheter of claim 13 or 14, wherein the outer layer is made of a hot melt material; the film layer is made of a heat-shrinkable material.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210900598.4A CN117504089A (en) | 2022-07-28 | 2022-07-28 | medical catheter |
| PCT/CN2023/105470 WO2024022041A1 (en) | 2022-07-28 | 2023-07-03 | Medical catheter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210900598.4A CN117504089A (en) | 2022-07-28 | 2022-07-28 | medical catheter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117504089A true CN117504089A (en) | 2024-02-06 |
Family
ID=89705288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210900598.4A Pending CN117504089A (en) | 2022-07-28 | 2022-07-28 | medical catheter |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN117504089A (en) |
| WO (1) | WO2024022041A1 (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101849825B (en) * | 2009-03-30 | 2014-03-26 | 上海微创医疗器械（集团）有限公司 | Weaving silk strengthening tube and electrophysiology conduit using same |
| JP5814530B2 (en) * | 2010-09-08 | 2015-11-17 | 株式会社カネカ | Medical catheter |
| JP6201367B2 (en) * | 2013-03-27 | 2017-09-27 | 住友ベークライト株式会社 | Medical device and method for manufacturing medical device |
| EP3120890B1 (en) * | 2014-03-18 | 2020-03-25 | Terumo Kabushiki Kaisha | Catheter |
| CN107376101B (en) * | 2017-02-24 | 2024-03-08 | 苏州恒瑞迪生医疗科技有限公司 | Microcatheter for Transcatheter Arterial Chemoembolization (TACE) |
| CN112972864A (en) * | 2019-12-16 | 2021-06-18 | 上海微创医疗器械（集团）有限公司 | Medical catheter |
| CN216148806U (en) * | 2020-11-12 | 2022-04-01 | 深圳市业聚实业有限公司 | Medical catheter |
-
2022
- 2022-07-28 CN CN202210900598.4A patent/CN117504089A/en active Pending
-
2023
- 2023-07-03 WO PCT/CN2023/105470 patent/WO2024022041A1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024022041A1 (en) | 2024-02-01 |
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