CN113384803A - Guide extension catheter - Google Patents
Guide extension catheter Download PDFInfo
- Publication number
- CN113384803A CN113384803A CN202110658062.1A CN202110658062A CN113384803A CN 113384803 A CN113384803 A CN 113384803A CN 202110658062 A CN202110658062 A CN 202110658062A CN 113384803 A CN113384803 A CN 113384803A
- Authority
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- China
- Prior art keywords
- catheter
- distal
- push rod
- guide extension
- inlet port
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 229920000642 polymer Polymers 0.000 claims description 22
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 8
- 230000002209 hydrophobic effect Effects 0.000 claims description 4
- 238000012800 visualization Methods 0.000 claims description 4
- 239000004677 Nylon Substances 0.000 claims description 3
- 239000004813 Perfluoroalkoxy alkane Substances 0.000 claims description 3
- 229920001903 high density polyethylene Polymers 0.000 claims description 3
- 239000004700 high-density polyethylene Substances 0.000 claims description 3
- 229910001000 nickel titanium Inorganic materials 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 229920011301 perfluoro alkoxyl alkane Polymers 0.000 claims description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229920002725 thermoplastic elastomer Polymers 0.000 claims description 3
- 229910001256 stainless steel alloy Inorganic materials 0.000 claims description 2
- 210000004351 coronary vessel Anatomy 0.000 description 11
- 238000000034 method Methods 0.000 description 6
- 230000017531 blood circulation Effects 0.000 description 5
- 238000013146 percutaneous coronary intervention Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 210000004204 blood vessel Anatomy 0.000 description 2
- 230000003902 lesion Effects 0.000 description 2
- 208000031481 Pathologic Constriction Diseases 0.000 description 1
- 210000001367 artery Anatomy 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000747 cardiac effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002594 fluoroscopy Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000004165 myocardium Anatomy 0.000 description 1
- HLXZNVUGXRDIFK-UHFFFAOYSA-N nickel titanium Chemical compound [Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni] HLXZNVUGXRDIFK-UHFFFAOYSA-N 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- HWLDNSXPUQTBOD-UHFFFAOYSA-N platinum-iridium alloy Chemical group [Ir].[Pt] HWLDNSXPUQTBOD-UHFFFAOYSA-N 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 230000036262 stenosis Effects 0.000 description 1
- 208000037804 stenosis Diseases 0.000 description 1
- 230000002966 stenotic effect Effects 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical group [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 230000002792 vascular Effects 0.000 description 1
Images
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
-
- 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
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/0102—Insertion or introduction using an inner stiffening member, e.g. stylet or push-rod
-
- 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
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
- A61M25/0111—Aseptic insertion devices
Abstract
The invention provides a guide extension catheter, which comprises a push rod and a distal catheter arranged at the distal end of the push rod; the far-side catheter comprises a conveying channel, the conveying channel comprises an inlet port and a push-out port, the inlet port is arranged at the near end of the conveying channel, the push-out port is arranged at the far end of the conveying channel, the inlet port is of a structure with gradually changed thickness, and the inner diameter of one end, close to the push rod, of the inlet port is larger than that of one end, far away from the push rod. The guide extension catheter designs the entrance port of the distal catheter into a flaring shape, and increases the inner diameter of the lumen of the entrance port as much as possible on the premise of ensuring that the outer diameter of the entrance port can smoothly pass through the guide catheter, so that the interventional coronary device can more easily enter the lumen, and the interventional coronary device is effectively prevented from being caught, clamped or stuck on the entrance port of the distal catheter.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a guide extension catheter.
Background
Percutaneous Coronary Intervention (PCI) refers to a treatment method for improving the perfusion of the blood flow of the cardiac muscle by opening the narrow or even occluded Coronary artery lumen through the cardiac catheter technique. The treatment method has the advantages of short treatment course, small wound, remarkable curative effect and the like, and is developed rapidly in recent years.
Some lesions are often encountered in PCI surgery in tortuous, calcified or severely stenotic vessels, and even if the balloon is pre-expanded sufficiently, it is difficult for the general interventional coronary device to reach the lesion site, and at this time, the supporting force provided by the guiding catheter is insufficient, and it is necessary to adopt a guiding extension catheter technology to provide additional supporting force for the guiding extension catheter, and the guiding extension catheter is deployed in the inner cavity of the guiding catheter and extends from the distal end of the guiding catheter to the distal side into the coronary artery. The small size allows the guiding extension catheter to be placed deeper into the coronary artery and with less potential for injury than the guiding catheter. During operation, the guide extension catheter provides additional supporting force for the guide catheter, and can play a good auxiliary role in delivering the interventional coronary device. In the case of difficult stenosis or transradial access, the use of a guiding extension catheter reduces the risk of the guiding catheter disengaging from the opening of the coronary ostia during treatment. However, because of the small size of the guide extension catheter, it presents certain difficulties in receiving an interventional coronary device. For example, an interventional coronary device (such as a stent) may become lodged on the entry port of a guide extension catheter, causing the stent to fall out.
Therefore, it is an urgent technical problem to be solved by those skilled in the art to provide a guiding and extending catheter which can facilitate the interventional coronary device to enter the guiding and extending catheter and prevent the interventional coronary device from being caught, clipped or stuck on the entrance port of the guiding and extending catheter.
Disclosure of Invention
In order to solve the above technical problems, the present invention provides a guiding extension catheter, which designs an entrance port of a distal catheter into a flared shape, and increases the inner diameter of the lumen of the entrance port as much as possible while ensuring that the outer diameter of the entrance port can smoothly pass through the guiding catheter, so that an interventional coronary device can more easily enter the lumen, and the interventional coronary device is effectively prevented from being caught, clamped, or stuck on the entrance port of the distal catheter.
The invention provides a guide extension catheter, which comprises a push rod and a distal catheter arranged at the distal end of the push rod; the far-side catheter comprises a conveying channel, the conveying channel comprises an inlet port and a push-out port, the inlet port is arranged at the near end of the conveying channel, the push-out port is arranged at the far end of the conveying channel, the inlet port is of a structure with gradually changed thickness, and the inner diameter of one end, close to the push rod, of the inlet port is larger than that of one end, far away from the push rod.
Preferably, the junction of the inlet port and the delivery channel is in smooth transition.
Preferably, the inlet port is of a trumpet-shaped configuration.
Preferably, the inlet port is a horn-shaped structure with a bevel, and the distal end of the push rod is connected with the tip side of the bevel.
Preferably, the distal catheter is provided with a through hole for communicating the inside of the distal catheter with the outside of the distal catheter.
Preferably, the tube wall of the distal catheter comprises a first polymer layer, a middle supporting layer and a second polymer layer which are sequentially arranged from inside to outside; the middle supporting layer is of a net structure or a spiral coil structure.
Preferably, a visualization structure is provided on the outer wall of the distal catheter or in the intermediate support layer.
Preferably, the first polymer layer is made of one or more of polytetrafluoroethylene, perfluoroalkoxyalkane, or high-density polyethylene; and/or the middle support layer is made of stainless steel or nickel-titanium alloy; and/or the second polymer layer is made of a thermoplastic elastomer or nylon.
Preferably, the exterior of the second polymer layer is further coated with a hydrophilic coating or a hydrophobic coating.
Preferably, the outer wall of the push rod is provided with a metering scale.
Preferably, the proximal end of the push rod is provided with a handle.
Compared with the prior art, the guide extension catheter provided by the invention has the advantages that the inlet port is designed into a structure with gradually-changed thickness, and the inner diameter of one end, close to the push rod, of the inlet port is larger than that of one end, far away from the push rod, of the inlet port, so that the inlet port of the far-side catheter is in a flaring shape with gradually-changed caliber, the inner diameter of a tube cavity of the inlet port is effectively increased on the premise that the outer diameter of the far-side catheter can smoothly pass through the guide catheter, an interventional coronary artery device can conveniently and smoothly enter a conveying channel of the far-side catheter, the interventional coronary artery device is prevented from being caught, clamped or clamped on the inlet port of the far-side catheter, and smooth operation is guaranteed.
When the interventional coronary artery guiding device is used, the guiding extension catheter provided by the invention is pushed through the guiding catheter along the guide wire until the distal end part of the distal catheter reaches the distal end part of the guiding catheter under the pushing of the push rod so as to enter the target position of a blood vessel, then the interventional coronary artery guiding device is sent into the guiding catheter along the guide wire until the interventional coronary artery guiding device reaches the entrance port of the distal catheter of the guiding extension catheter, and the interventional coronary artery guiding device easily enters the conveying channel of the distal catheter under the guiding of the entrance port and is pushed out from the push-out port of the distal catheter so as to reach the treatment position.
Drawings
FIG. 1 is a schematic view of a guide extension catheter according to the present invention;
FIG. 2 is a schematic view of one configuration of the access port of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2;
FIG. 4 is a schematic view of one configuration of the access port of the present invention;
wherein 1-push rod, 2-distal catheter, 21-entry port, 22-delivery channel, 23-push out port, 31-first polymer layer, 32-middle support layer, 33-second polymer layer, 4-handle, 5-guide catheter.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the present application will be clearly and completely described below with reference to specific embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
As shown in fig. 1 to 4, the present invention provides a guide extension catheter, including a push rod 1, and a distal catheter 2 disposed at a distal end of the push rod 1; the distal catheter 2 comprises a conveying channel 22, the conveying channel 22 comprises an inlet port 21 and an ejecting port 23, the inlet port 21 is arranged at the proximal end of the conveying channel 22, the ejecting port 23 is arranged at the distal end of the conveying channel 22, the inlet port 21 is of a gradually-thick structure, and the inner diameter of one end, close to the push rod 1, of the inlet port 21 is larger than that of one end, far away from the push rod 1, of the inlet port 21.
Compared with the prior art, the guide extension catheter provided by the invention has the advantages that the inlet port 21 is designed into a structure with gradually-changed thickness, and the inner diameter of one end, close to the push rod 1, of the inlet port 21 is larger than that of one end, far away from the push rod 1, of the inlet port 21 of the far-side catheter 2, so that the inlet port 21 of the far-side catheter 2 is in a flaring shape with gradually-changed caliber, the inner diameter of the lumen of the inlet port 21 is effectively increased on the premise that the outer diameter of the far-side catheter 2 can smoothly pass through the guide catheter, an interventional coronary artery device can conveniently and smoothly enter the conveying channel 22 of the far-side catheter 2, the interventional coronary artery device is prevented from being caught, clamped or clamped on the inlet port 21 of the far-side catheter 2, and the smooth operation is guaranteed.
When in use, the guiding extension catheter provided by the invention is pushed to pass through the guiding catheter 5 along the guide wire until the distal end part of the distal catheter 2 reaches the distal end part of the guiding catheter 5 under the pushing of the push rod 1, and then enters the target position of a blood vessel, then the interventional coronary device is sent into the guiding catheter 5 along the guide wire until the distal end part reaches the entrance port 21 of the distal catheter 2, because the entrance port 21 of the distal catheter 2 is of a structure with gradually changed thickness, on one hand, the interventional coronary device can be favorably inserted into the guiding catheter 5 (namely directly inserted into the guiding catheter 5) by utilizing the gradient of the entrance port 21 without adjusting the entrance angle, on the other hand, the interventional coronary device can be prevented from being blocked when being inserted into the guiding catheter 5 blindly, therefore, the interventional coronary device can easily enter the conveying channel 22 of the distal catheter 2 under the guiding of the entrance port 21, and is further pushed out from the push-out port 23 of the distal catheter 2 to the treatment site.
Preferably, the junction of the inlet port 21 and the delivery channel 22 transitions smoothly. The smooth transition connection mode can effectively reduce the resistance of the interventional coronary device moving from the inlet port 21 to the conveying channel 22, and the interventional coronary device can enter the conveying channel 22 of the distal catheter 2 more conveniently, so that the interventional coronary device is prevented from being stumbled, clamped or stuck on the inlet port 21 of the distal catheter 2.
Preferably, the inlet port 21 is of a trumpet-shaped configuration.
Preferably, the inlet port 21 is of a bell-shaped configuration with a beveled mouth, and the distal end of the push rod 1 is connected to the tip side of the beveled mouth. The bevel opening is arranged to play a certain guiding and guiding role for the interventional coronary device to move to the inlet port 21, so that the interventional coronary device smoothly enters the conveying channel 22 through the inlet port 21 under the guiding of the tip side of the bevel opening, and the rapid exchange of instruments is realized.
Preferably, the distal catheter 2 is provided with a through hole for communicating the inside of the distal catheter 2 with the outside of the distal catheter 2.
In use, since the distal catheter 2 is a hollow structure with a closed periphery, when the distal catheter is extended into a target position, blood flow at the distal side of the extension catheter may be guided in the middle section, which may cause a condition of insufficient blood flow in the artery at the distal side of the extension catheter. In order to solve the problem, the through hole can be arranged on the far-side catheter 2, the inside and the outside of the far-side catheter 2 are communicated through the through hole, the blood flow on the inner side and the outer side of the far-side catheter 2 is ensured, and the blood flow blockage in the operation process is prevented.
In particular, the through-hole may be circular, oval, elongated, or any other shape suitable for the purpose of the present invention.
Preferably, the outer wall of the distal catheter 2 or an intermediate support layer is provided with a visualization structure. The arrangement of the developing structure can facilitate the clear observation and judgment of the position of the distal catheter 2 in the operation when X-ray fluoroscopy is used.
Specifically, the development structure is a tantalum ring or a platinum iridium ring or other developed metal ring or polymer ring, etc.
Preferably, the visualization structure is provided on the distal end or ejection port 23 of the delivery channel 22.
Preferably, the wall of the distal catheter 2 comprises a first polymer layer 31, a middle support layer 32 and a second polymer layer 33 which are arranged from inside to outside in sequence; the intermediate support layer 32 is a mesh structure or a spiral coil structure.
When the middle support layer 32 is a mesh structure, the middle support layer 32 is coated outside the first polymer layer 31; when the intermediate support layer 32 is a spiral coil structure, the intermediate support layer 32 is wrapped around the outside of the first polymer layer 31.
The middle support layer 32 can provide enough support force for the distal catheter 2, so that the distal catheter has excellent bending resistance, and the distal catheter can conveniently and smoothly pass through the narrow part of the vascular access, thereby being beneficial to the smooth operation.
Preferably, the distal end of the push rod 1 may be inserted directly into the wall of the distal catheter 2, may be located between the second polymer layer 33 and the intermediate support layer 32, or between the first polymer layer 31 and the intermediate support layer 32, or may be directly attached to the intermediate support layer 32.
Preferably, the first polymer layer 31 is made of one or more of polytetrafluoroethylene, perfluoroalkoxyalkane, or high-density polyethylene; and/or the intermediate support layer 32 is made of stainless steel or nitinol; and/or the second polymer layer 33 is made of a thermoplastic elastomer or nylon.
Preferably, the exterior of the second polymer layer 33 is further coated with a hydrophilic coating or a hydrophobic coating.
The arrangement of the hydrophilic coating or the hydrophobic coating can effectively reduce the friction force of the outer wall of the distal catheter 2 and improve the pushing performance of the distal catheter.
Preferably, the outer wall of the push rod 1 is provided with a metering scale. The arrangement of the metering scales can be used for positioning the pushing depth of the distal catheter 2 in the operation process, and the ray radiation amount of an operator in the operation process is reduced.
Preferably, the proximal end of the push rod 1 is provided with a handle 4.
In particular, the handle 4 may be made of medical grade plastic by injection molding. The handle 4 is arranged to facilitate the operator to control the guiding extension catheter.
In the present invention, proximal refers to the end near the operator.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A guide extension catheter comprising a push rod, and a distal catheter disposed at a distal end of the push rod;
the far-side catheter comprises a conveying channel, the conveying channel comprises an inlet port and a push-out port, the inlet port is arranged at the near end of the conveying channel, the push-out port is arranged at the far end of the conveying channel, the inlet port is of a structure with gradually changed thickness, and the inner diameter of one end, close to the push rod, of the inlet port is larger than that of one end, far away from the push rod.
2. The guide extension catheter of claim 1, wherein the inlet port is a trumpet-type structure.
3. The guide extension catheter of claim 2, wherein the access port is a flared structure with a beveled mouth, the distal end of the push rod being connected to a tip side of the beveled mouth.
4. The guide extension catheter of any one of claims 1-3, wherein the distal catheter is provided with a through hole for communicating an interior of the distal catheter with an exterior of the distal catheter.
5. The guide extension catheter of claim 4, wherein the wall of the distal catheter comprises a first polymer layer, an intermediate support layer, and a second polymer layer arranged in sequence from inside to outside;
the middle supporting layer is of a net structure or a spiral coil structure.
6. The guide extension catheter of claim 4, wherein a visualization structure is provided on an outer wall of the distal catheter or in an intermediate support layer.
7. The guide extension catheter of claim 6, wherein the first polymer layer is made of one or more of polytetrafluoroethylene, perfluoroalkoxyalkane, or high density polyethylene;
and/or the middle support layer is made of stainless steel or nickel-titanium alloy;
and/or the second polymer layer is made of a thermoplastic elastomer or nylon.
8. The guide extension catheter of claim 6, wherein the exterior of the second polymer layer is further coated with a hydrophilic coating or a hydrophobic coating.
9. The guide extension catheter of claim 4, wherein the push rod is provided with a gauge scale on an outer wall thereof.
10. The guide extension catheter of claim 4, wherein the proximal end of the push rod is provided with a handle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110658062.1A CN113384803A (en) | 2021-06-11 | 2021-06-11 | Guide extension catheter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110658062.1A CN113384803A (en) | 2021-06-11 | 2021-06-11 | Guide extension catheter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113384803A true CN113384803A (en) | 2021-09-14 |
Family
ID=77620853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110658062.1A Pending CN113384803A (en) | 2021-06-11 | 2021-06-11 | Guide extension catheter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113384803A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11660420B2 (en) | 2018-09-17 | 2023-05-30 | Seigla Medical, Inc. | Catheters and related devices and methods of manufacture |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206491909U (en) * | 2016-11-09 | 2017-09-15 | 恩脉（上海）医疗科技有限公司 | One kind guides extension conduit |
| US20170312479A1 (en) * | 2016-04-29 | 2017-11-02 | Medtronic, Inc. | Interventional medical systems and improved assemblies thereof and associated methods of use |
| CN108025160A (en) * | 2015-09-23 | 2018-05-11 | 美敦力瓦斯科尔勒公司 | Guiding extension conduit with fill openings |
| CN110917465A (en) * | 2019-12-31 | 2020-03-27 | 科睿驰（深圳）医疗科技发展有限公司 | Guide extension catheter |
| US20210113812A1 (en) * | 2019-10-22 | 2021-04-22 | Biosense Webster (Israel) Ltd. | Flared insert member for use with catheter assembly |
-
2021
- 2021-06-11 CN CN202110658062.1A patent/CN113384803A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108025160A (en) * | 2015-09-23 | 2018-05-11 | 美敦力瓦斯科尔勒公司 | Guiding extension conduit with fill openings |
| US20170312479A1 (en) * | 2016-04-29 | 2017-11-02 | Medtronic, Inc. | Interventional medical systems and improved assemblies thereof and associated methods of use |
| CN206491909U (en) * | 2016-11-09 | 2017-09-15 | 恩脉（上海）医疗科技有限公司 | One kind guides extension conduit |
| US20210113812A1 (en) * | 2019-10-22 | 2021-04-22 | Biosense Webster (Israel) Ltd. | Flared insert member for use with catheter assembly |
| CN110917465A (en) * | 2019-12-31 | 2020-03-27 | 科睿驰（深圳）医疗科技发展有限公司 | Guide extension catheter |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11660420B2 (en) | 2018-09-17 | 2023-05-30 | Seigla Medical, Inc. | Catheters and related devices and methods of manufacture |
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Application publication date: 20210914 |