CN214807716U - Guide catheter for cerebral vascular interventional therapy through right radial artery - Google Patents
Guide catheter for cerebral vascular interventional therapy through right radial artery Download PDFInfo
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- CN214807716U CN214807716U CN202120869522.0U CN202120869522U CN214807716U CN 214807716 U CN214807716 U CN 214807716U CN 202120869522 U CN202120869522 U CN 202120869522U CN 214807716 U CN214807716 U CN 214807716U
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Abstract
The utility model discloses a through right radial artery cerebral vessels interventional therapy guide pipe, include: an inner layer having a working channel; an outer layer; and a structural retainer located between the inner layer and the outer layer, the structural retainer being bonded to the inner layer by an adhesive, the structural retainer extending helically along a length of the inner layer; wherein the inner layer, the outer layer and the structural retainer define a catheter body having a first tube segment, a second tube segment, a third tube segment and a fourth tube segment, a first included angle is formed between the first tube segment and the second tube segment and a first bend is formed that bends outward, a second included angle is formed between the second tube segment and the third tube segment and a second bend is formed that bends inward, a third included angle is formed between the third tube segment and the fourth tube segment and a third bend is formed that bends outward. The utility model discloses make and guide the integrality that the pipe can keep self structure at the propulsion in-process, it walks to comply with the blood vessel, avoids the pipe to produce and rolls over, kinks, reduces the operation degree of difficulty.
Description
Technical Field
The utility model relates to a guide catheter, in particular to a guide catheter for interventional therapy of cerebral vessels through right radial artery.
Background
The right radial artery cerebral vessel interventional therapy is an important method explored by many cerebral vessel interventional centers at present, compared with the conventional transfemoral artery access, the complications of puncture points are obviously reduced, the radial artery position is shallow and thin in inner diameter, and the artery laceration is easy to find after the puncture operation for hemostasis by compression. Puncture site bleeding complications requiring surgical intervention are as low as 0.06%. The patient comfort level is higher after the interventional therapy of radial artery approach, the strict bed-lying brake is not needed, the hospitalization time is obviously shortened, and the hospitalization cost is low.
The guide catheter can provide a path for interventional therapy of a therapeutic device, is used in coronary artery, cerebral blood vessel or peripheral blood vessel system, and is a necessary device for a balloon, a guide wire, a stent and other components to enter a target blood vessel.
However, most of the currently used cerebrovascular interventional treatment catheters are transfemoral femoral artery treatment guide catheters (such as Cordis catheters), and if the catheter is used through a radial artery, the catheter has the following defects: firstly, the operation process is complex: the Simmon tube is looped under the assistance of the loach guide wire and then is selected into the common carotid artery or the subclavian artery, then the hard guide wire is replaced, and a 4F catheter is used for assisting to send a 6F guide catheter to the common carotid artery, the internal carotid artery or the subclavian artery; secondly, the included angle between the right subclavian artery and the bilateral common carotid artery and the left subclavian artery is large, the guide catheter is not supported enough, and the guide catheter is easy to fall into the aortic arch during operation, so that operation failure is caused; thirdly, the catheter is easy to be broken at the intersection of the innominate artery and the right common carotid artery, which causes the failure of the operation and needs to puncture the femoral artery to be re-placed into the guiding catheter.
In addition, the conventional guide tube is easily bent or kinked during the advancing process, thereby increasing the difficulty of operation.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to intervene not enough that exists in material and the technique to current, provide one kind and intervene the treatment through right radial artery cerebral vessels and guide the pipe for guide the integrality that the pipe can keep self structure in advancing the in-process, avoid producing and discount, kink, drop, and reduce the operation degree of difficulty.
To the above purpose, the utility model adopts the following technical scheme:
a transright radial cerebral vascular interventional therapy guiding catheter, comprising:
an inner layer having a working channel;
an outer layer; and
a structural retainer between the inner layer and the outer layer, the structural retainer bonded to the inner layer by an adhesive, the structural retainer extending helically along a length of the inner layer;
wherein the inner layer, the outer layer, and the structural retainer define a catheter body having a first tube segment, a second tube segment, a third tube segment, and a fourth tube segment connected in series from a proximal portion to a distal portion, the first tube segment and the second tube segment forming a first angle therebetween and forming a first bend that curves outwardly, the second tube segment and the third tube segment forming a second angle therebetween and forming a second bend that curves inwardly, the third tube segment and the fourth tube segment forming a third angle therebetween and forming a third bend that curves outwardly, the first bend and the second bend having a first length therebetween, the second bend and the third bend having a second length therebetween, the third bend and a distal end of the fourth tube segment having a third length therebetween.
Further, the outer layer is configured to be heat shrunk outside of the inner layer and the structural retainer.
Further, the adhesive comprises a thermoset polyurethane adhesive.
Further, the guide catheter comprises a catheter hub connected to the catheter body, the catheter body being connected to an operation device through the catheter hub.
Further, the inner surface of the inner layer is coated with a first hydrophilic coating.
Further, the outer surface of the outer layer is coated with a second hydrophilic coating.
Further, the first included angle is 135-145 degrees, the second included angle is 40-55 degrees, the third included angle is 130-140 degrees, the first length is 1.5-2.5 cm, the second length is 2-3 cm, and the third length is 2-3 mm.
Further, the diameter of the working channel is 1.8mm, and the outer diameter of the catheter body is 2 mm.
Further, the inner layer is seamless.
Further, the structural retainer is made of a shape memory material.
Compared with the prior art, the beneficial effects of the utility model are that: the inner layer, outer layer and structural retainer together provide the catheter body with good structural integrity so that the catheter body does not bend, kink or kink as expected when passed through the vascular system under the application of a pushing or twisting force (rotational force) applied to its proximal end. Moreover, the natural bending of the catheter body can follow the running of the vascular system, so that the relevant cerebral vessels can be better passed. The catheter main body can form a loop in the aortic arch, and can enter blood vessels on each arch by keeping the natural bent shape under the assistance of the inner catheter and the guide wire without molding again, thereby reducing the operation difficulty of the operation and reducing the operation risk.
Drawings
Fig. 1 is a schematic structural view of a guide catheter according to the present invention;
fig. 2 is a schematic structural view of the catheter main body of the present invention;
fig. 3 is a longitudinal cross-sectional view of the catheter body of the present invention;
fig. 4 is a transverse cross-sectional view of the catheter body of the present invention.
Reference numerals: 100. a guide catheter; 10. a catheter body; 20. a catheter hub; 30. an operating device; 1. a first tube section; 2. a second tube section; 3. a third tube section; 4. a fourth tube section; 5. a first bend; 6. a second bend; 7. a third bend; 8. an inner layer; 9. an outer layer; 11. a structural retainer; 12. a working channel; 13. a first hydrophilic coating; 14. a second hydrophilic coating; l1, first length; l2, second length; l3, third length; theta 1 and a first included angle; theta 2 and a second included angle; theta 3 and a third included angle.
Detailed Description
For the purpose of promoting a better understanding of the objects, structures, features, and functions of the invention, reference should now be made to the drawings and detailed description of the invention.
It should be noted that the features illustrated in the drawings are not necessarily drawn to scale. Moreover, the described embodiments are only some of the described embodiments of the present invention, and not all of them. All other embodiments, which can be obtained by a person skilled in the art without any inventive work based on the described embodiments of the present invention, belong to the protection scope of the present invention.
Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another.
As shown in fig. 1 to 4, a transright radial cerebral vascular interventional therapy guiding catheter 100 according to an embodiment of the present invention includes an inner layer 8, an outer layer 9 and a structural holder 11, wherein the inner layer 8, the outer layer 9 and the structural holder 11 define a catheter main body 10. The inner layer 8, outer layer 9 and structural retainer 11 interact to provide the catheter body 10 with good structural integrity so that the catheter body 10 does not bend, kink or kink as expected when passing through the vascular system under the application of a pushing or twisting force (rotational force) applied to its proximal end.
In some embodiments, the guide catheter 100 may include, in addition to the catheter body 10, a catheter hub 20 mounted to the proximal end of the catheter body 10, and the catheter body 10 may be connected to an operation device 30, such as an operation handle, a catheter head, or a twist control, etc., through the catheter hub 20.
The inner layer 8 has a working channel 12 through which a therapeutic device (e.g., an inner catheter, guidewire, balloon, stent, or other) can be delivered to the vascular system of a patient. For example, as shown in fig. 2, located inside the catheter body 10 is a guidewire. The inner layer 8 is made of an existing material, and the material forming the inner layer 8 may be Polytetrafluoroethylene (PTFE), fluoropolymer, Perfluoroalkoxyalkane (PFA), or Fluorinated Ethylene Propylene (FEP). The inner surface of the inner layer 8 is coated with a first hydrophilic coating 13 to facilitate introduction and passage of a therapeutic device. The material of the first hydrophilic coating 13 is an existing hydrophilic coating. In some embodiments, working channel 12 is 1.8mm in diameter. The outer diameter of the catheter body 10 is 2mm (i.e. a 6F catheter). As is well known in the art, 1F-1/3 mm ≈ 0.33mm, so 6F-2 mm.
In some embodiments, the inner layer 8 may be seamless such that the working channel 12 of the catheter body 10 may be continuous along the entire length of the inner layer 8. The seamless inner layer 8 allows the therapeutic device to slide more easily within the working channel 12 than a catheter formed from multiple longitudinal tube segments mechanically connected to each other, because the seamless inner layer 8 may allow the working channel 12 to be more smooth. In addition, the seamless inner layer 8 may help distribute thrust and rotational forces along the length of the catheter, helping to promote pushability of the catheter body 10.
In some embodiments, the catheter body 10 may be advanced to a predetermined location of the patient's vasculature in cooperation with a guidewire, an inner catheter, or both, which may assist in guiding the catheter body 10 through the vasculature. For example, the working channel 12 of the catheter body 10 may be configured to receive a guidewire or an inner catheter such that the catheter body 10 may be passed through the vascular system via the guidewire or inner catheter.
The outer layer 9 is made of an existing material, for example, the material forming the outer layer 9 may be polyether block Polyamide (PEBAX), aliphatic polyamide, or the like. The outer surface of the outer layer 9 is coated with a second hydrophilic coating 14 to reduce friction between the catheter body 10 and the patient's tissue as the catheter body 10 passes through the vasculature. The material of the second hydrophilic coating 14 is an existing hydrophilic coating.
In some embodiments, the outer layer 9 is configured to be heat shrunk outside the inner layer 8 and the structural retainer 11 such that the outer layer 9 need not be attached to the outside of the inner layer 8 and the structural retainer 11 by adhesive, which facilitates reducing the wall thickness of the catheter body 10 as a whole, may increase the inner diameter of the catheter body 10 for a given outer diameter, i.e., increase the diameter of the working channel 12, allowing a greater range of medical devices to be able to pass through the working channel 12 or to more easily manipulate the medical device within the working channel 12.
The structural retainer 11 is located between the inner layer 8 and the outer layer 9, and the structural retainer 11 is bonded to the inner layer 8 by an adhesive. Wherein the adhesive may be a thermoset polyurethane adhesive. The structure retaining member 11 extends spirally along the length direction of the inner layer 8. The structural retainer 11 may be made of a shape memory material. Such as a nickel titanium alloy. The structural retention element 11 serves to increase the structural integrity of the catheter body 10 while allowing the catheter body 10 to remain relatively flexible. For example, the structural retainer 11 may be used to maintain the catheter body 10 in its cross-sectional shape or to prevent bending or kinking of the catheter body 10 as it passes through tortuous anatomy. Together, the structural retainer 11 and the inner and outer layers 8, 9 can facilitate distribution of pushing and rotational forces along the length of the catheter body 10, preventing it from bending when pushing forces are applied thereto, or preventing it from kinking when rotational forces are applied thereto.
The catheter body 10 has a first tube segment 1, a second tube segment 2, a third tube segment 3 and a fourth tube segment 4 connected in sequence from a proximal end portion to a distal end portion, the first tube segment 1 and the second tube segment 2 form a first included angle θ 1 therebetween and form a first bend 5 bent to an outer side, the second tube segment 2 and the third tube segment 3 form a second included angle θ 2 therebetween and form a second bend 6 bent to an inner side, the third tube segment 3 and the fourth tube segment 4 form a third included angle θ 3 therebetween and form a third bend 7 bent to an outer side, the first bend 5 and the second bend 6 have a first length L1 therebetween, the second bend 6 and the third bend 7 have a second length L2 therebetween, and the third bend 7 and the end of the fourth tube segment 4 have a third length L3 therebetween. The catheter body 10 is constructed so that it can substantially conform to the curvature of the vascular system and thereby better navigate the associated cerebral vasculature. In some embodiments, the first included angle θ 1 is 135-145 °, the second included angle θ 2 is 40-55 °, the third included angle θ 3 is 130-140 °, the first length L1 is 1.5-2.5 cm, the second length L2 is 2-3 cm, and the third length L3 is 2-3 mm.
After the catheter main body 10 is pushed by the inner catheter or the guide wire, a loop can be formed in the aortic arch, the operation difficulty of the operation is reduced, and the operation risk is reduced.
The above detailed description is only for the purpose of illustrating the preferred embodiments of the present invention, and not for the purpose of limiting the scope of the present invention, therefore, all the equivalent technical changes using the description and drawings of the present invention are included in the scope of the present invention.
Claims (10)
1. A transright radial cerebral vascular interventional therapy guide catheter, comprising:
an inner layer having a working channel;
an outer layer; and
a structural retainer between the inner layer and the outer layer, the structural retainer bonded to the inner layer by an adhesive, the structural retainer extending helically along a length of the inner layer;
wherein the inner layer, the outer layer, and the structural retainer define a catheter body having a first tube segment, a second tube segment, a third tube segment, and a fourth tube segment connected in series from a proximal portion to a distal portion, the first tube segment and the second tube segment forming a first angle therebetween and forming a first bend that curves outwardly, the second tube segment and the third tube segment forming a second angle therebetween and forming a second bend that curves inwardly, the third tube segment and the fourth tube segment forming a third angle therebetween and forming a third bend that curves outwardly, the first bend and the second bend having a first length therebetween, the second bend and the third bend having a second length therebetween, the third bend and a distal end of the fourth tube segment having a third length therebetween.
2. The transright radial cerebral vascular interventional therapy guiding catheter as set forth in claim 1, wherein: the outer layer is configured to be heat shrunk outside of the inner layer and the structural retainer.
3. The transright radial cerebral vascular interventional therapy guiding catheter as set forth in claim 1, wherein: the adhesive comprises a thermoset polyurethane adhesive.
4. The transright radial cerebral vascular interventional therapy guiding catheter as set forth in claim 1, wherein: the guide catheter includes a catheter hub coupled to the catheter body, the catheter body being coupled to an operating device through the catheter hub.
5. The transright radial cerebral vascular interventional therapy guiding catheter as set forth in claim 1, wherein: the inner surface of the inner layer is coated with a first hydrophilic coating.
6. The transright radial cerebral vascular interventional therapy guiding catheter as set forth in claim 1, wherein: the outer surface of the outer layer is coated with a second hydrophilic coating.
7. The transright radial cerebral vascular interventional therapy guiding catheter as set forth in claim 1, wherein: the first included angle is 135-145 degrees, the second included angle is 40-55 degrees, the third included angle is 130-140 degrees, the first length is 1.5-2.5 cm, the second length is 2-3 cm, and the third length is 2-3 mm.
8. The transright radial cerebral vascular interventional therapy guiding catheter as set forth in claim 1, wherein: the diameter of the working channel is 1.88mm, and the outer diameter of the catheter main body is 2 mm.
9. The transright radial cerebral vascular interventional therapy guiding catheter as set forth in claim 1, wherein: the inner layer is seamless.
10. The transright radial cerebral vascular interventional therapy guiding catheter as set forth in claim 1, wherein: the structural retainer is made of a shape memory material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120869522.0U CN214807716U (en) | 2021-04-25 | 2021-04-25 | Guide catheter for cerebral vascular interventional therapy through right radial artery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120869522.0U CN214807716U (en) | 2021-04-25 | 2021-04-25 | Guide catheter for cerebral vascular interventional therapy through right radial artery |
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| CN214807716U true CN214807716U (en) | 2021-11-23 |
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| CN202120869522.0U Active CN214807716U (en) | 2021-04-25 | 2021-04-25 | Guide catheter for cerebral vascular interventional therapy through right radial artery |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114306883A (en) * | 2022-01-05 | 2022-04-12 | 聚辉医疗科技(深圳)有限公司 | Method for manufacturing microcatheter and microcatheter |
| CN114504718A (en) * | 2022-02-14 | 2022-05-17 | 艾柯医疗器械(北京)有限公司 | Transcranial radial artery intracranial catheter |
-
2021
- 2021-04-25 CN CN202120869522.0U patent/CN214807716U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114306883A (en) * | 2022-01-05 | 2022-04-12 | 聚辉医疗科技(深圳)有限公司 | Method for manufacturing microcatheter and microcatheter |
| CN114504718A (en) * | 2022-02-14 | 2022-05-17 | 艾柯医疗器械(北京)有限公司 | Transcranial radial artery intracranial catheter |
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