CN114246637A - Intracranial thrombus suction catheter device - Google Patents
Intracranial thrombus suction catheter device Download PDFInfo
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- CN114246637A CN114246637A CN202210019803.6A CN202210019803A CN114246637A CN 114246637 A CN114246637 A CN 114246637A CN 202210019803 A CN202210019803 A CN 202210019803A CN 114246637 A CN114246637 A CN 114246637A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/22—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/22—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for
- A61B2017/22079—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for with suction of debris
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Abstract
The invention relates to an intracranial thrombus aspiration catheter device, and belongs to the technical field of medical instruments. Comprises a suction catheter body and a handle; the suction catheter body comprises an outer layer pipe and an inner layer pipe; a liquid inflow channel is arranged in the pipe wall of the inner layer pipe and is communicated with the pipe cavity of the inner layer pipe; the handle is a three-way Y-shaped handle; the handle is provided with a suction port and an injection communicating interface which are connected with an external negative pressure source. The invention can change the flow state of liquid in the tube body, change the internal structure of the liquid, reduce the viscosity and density of blood, reduce the viscosity of the tube to the fluid, increase the direct suction force or impact force to thrombus and accelerate the thrombus extraction process. The invention is suitable for patients with different blood viscosities; the direct suction force to the thrombus is larger; the positioning is easier; the contrast agent can be injected simultaneously during suction, so that the thrombus extraction condition can be judged in real time; shorten the time of suction and operation and reduce the excessive blood loss of patients.
Description
Technical Field
The invention relates to an intracranial thrombus aspiration catheter device, and belongs to the technical field of medical instruments.
Background
rt-PA thrombolytic by intravenous injection is the only currently proven effective acute treatment for cerebral infarction. However, the intravenous thrombolytic therapy has long time, great damage to ischemic brain tissue and bleeding risk, and very low recanalization rate; the recanalization rate of basilar artery thrombolysis is only about 30%, the recanalization rate of lesion thrombolysis at the tail end of carotid artery is only 6%, and the recanalization rate of common carotid artery thrombolysis is only about 27%. And the time window for intravenous thrombolysis is only about 4 hours. From the above, the single use of venous thrombolysis for cerebral artery occlusion is far from sufficient, and the single use of venous thrombolysis is not enough to meet the actual clinical requirements.
The mechanical thrombus extraction is to convey a thrombus extractor to a lesion position and then extract thrombus out of a body through a sheath tube, and the mechanical thrombus extraction comprises the following methods: the method has the advantages that thrombus removal is thorough, but the injury to the vascular wall is excessive, so that various complications are easily caused; the method has the advantages that the operation difficulty is high, the laser energy is ineffective when the laser energy is too low, the blood vessel is damaged when the energy is too high, and various inflammations are caused; although the operation is simple, the thrombus-capturing net cannot be used in intracranial stenotic vessels due to large volume, and the time consumption is relatively long.
The suction thrombus is a novel thrombus extraction means at present, the time from femoral artery puncture to reperfusion can be reduced, the whole operation time is shortened, and the damage to the vascular wall is reduced. However, the aspiration and thrombus removal have some problems, due to the limitation of the inner diameter of the catheter, the blood viscosity is high, and the thrombus is large or hard, the disposable aspiration thrombus is time-consuming during aspiration, the thrombus is broken, the thrombus cannot be extracted, the blood flow does not flow during aspiration, whether the thrombus is completely extracted cannot be judged, a contrast medium needs to be injected for judgment, and when the contrast medium is injected, if the thrombus is not completely extracted, the thrombus can be displaced along with the injection pressure of the contrast medium and even run to other positions, so that the thrombus removal difficulty and the position uncertainty of the thrombus are caused, and the postoperative recovery of a patient is influenced or other complications are caused. The technical field needs to solve the problems of improving the suction force of the suction catheter, namely, rapidly taking thrombus without adding any other instruments, and avoiding the problem that the thrombus is displaced to other blood vessels due to the injection of contrast medium because whether the thrombus is taken out or not cannot be judged.
Disclosure of Invention
The invention aims to solve the defects of insufficient suction force and the like in the conventional suction plug and solve the technical problems that the suction and the injection of a contrast medium cannot be simultaneously carried out and the condition of thrombus extraction cannot be judged in the prior art.
In order to solve the problems, the technical scheme adopted by the invention is to provide an intracranial thrombus aspiration catheter device; comprises a suction catheter body and a handle; the suction catheter body comprises an outer layer pipe and an inner layer pipe; a liquid inflow channel is arranged in the pipe wall of the inner layer pipe and is communicated with the pipe cavity of the inner layer pipe; the handle is a three-way Y-shaped handle; the handle is provided with a suction port and an injection communicating interface which are connected with an external negative pressure source.
Preferably, one end of the handle, which is far away from the suction catheter, is provided with an injection communicating interface, the other end of the handle is connected with the suction catheter, and a liquid inflow port is arranged at the connecting part; the injection liquid communication interface is connected with the liquid inflow channel through a liquid inflow port.
Preferably, one end of the suction catheter body, which is close to the operator, is provided with a proximal end supporting liquid passing section, and a liquid inflow channel is arranged in the tube wall of the inner layer tube of the suction catheter, which is provided with the proximal end supporting liquid passing section.
Preferably, the end of the suction catheter body far away from the operator is provided with a distal flexible section, and the suction catheter of the distal flexible section consists of an outer layer tube and an inner layer tube.
Preferably, the liquid inflow channel arranged in the tube wall of the inner tube is parallel to the central axis of the suction catheter body.
Preferably, the number of the liquid inflow passages arranged in the pipe wall of the inner layer pipe is set to be more than or equal to 1.
Preferably, a liquid inflow port for communicating a liquid inflow channel in the tube wall of the inner tube with the tube cavity of the inner tube is arranged on the tube wall of the inner tube at the joint of the proximal supporting liquid-passing section and the distal flexible section.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, according to the liquid flow principle and the fluid viscosity principle of the pipeline, the flow state of the liquid in the pipe body is changed, other liquid is added to change the internal structure of the fluid, the viscosity and the density of blood are reduced, the viscosity of the catheter to the fluid is reduced, the direct suction force or the impact force to thrombus is increased, and the thrombus extraction process is accelerated.
The beneficial effects are that: 1. the blood concentration and viscosity during suction can be reduced, the flow state of fluid in the catheter during suction is changed, and the suction speed is higher; 2. can be suitable for patients with different blood viscosities; 3. the suction catheter with the same inner diameter has larger direct suction force on thrombus; 4. the near end has stronger support and is easier to put in place; 5. the contrast agent can be injected simultaneously during suction, so that the thrombus extraction condition can be judged in real time; 6. the suction and operation time is shortened, and the excessive blood loss of the patient is reduced; 7. the rapid thrombus removal is realized under the condition that any other instruments are not added as much as possible.
Drawings
FIG. 1 is a schematic structural view of an intracranial thrombus aspiration catheter device of the present invention;
FIG. 2 is an enlarged view of a portion A of FIG. 1;
FIG. 3 is an enlarged view of a portion B of FIG. 1;
FIG. 4 is an enlarged view of a portion of FIG. 1 at C;
FIG. 5 is an enlarged partial cross-sectional view taken at E-E in FIG. 1;
FIG. 6 is an enlarged partial cross-sectional view taken at F-F in FIG. 1;
reference numerals: 1. a suction port; 2. an injection communicating port; a Y-shaped handle; 4. the proximal end supports a liquid passing section; 5. a distal flexible segment; 6. a liquid flow inlet; 7. an outer tube; 8. an inner layer tube; 9. a reinforcing layer; 10. the liquid flows into the channel.
Detailed Description
In order to make the invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings:
1-6, the present invention provides an intracranial thrombus aspiration catheter device; comprises a suction catheter body and a handle 3; the suction catheter body comprises an outer layer pipe 7 and an inner layer pipe 8; a liquid inflow channel 10 is arranged in the pipe wall of the inner layer pipe 8, and the liquid inflow channel 10 is communicated with the pipe cavity of the inner layer pipe 8; the handle is a three-way Y-shaped handle 3; the handle 3 is provided with a suction port 1 connected with an external negative pressure source and an injection communicating interface 2. One end of the handle far away from the suction catheter is provided with an injection communicating interface 2, the other end of the handle is connected with the suction catheter, and a liquid inflow port 6 is arranged at the connecting part; the injection liquid communication port 2 is connected to the liquid inflow channel 10 through the liquid inflow port 6. The end of the suction catheter body close to the operator is provided with a near-end supporting liquid passing section 4, and a liquid inflow channel 10 is arranged in the tube wall of the inner layer tube 8 of the suction catheter, which is provided with the near-end supporting liquid passing section 4. The end of the suction catheter body far away from the operator is provided with a far-end flexible section 5, and the suction catheter of the far-end flexible section 5 consists of an outer layer tube 7 and an inner layer tube 8. The inner tube 8 has a liquid inflow passage 10 formed in the wall thereof in parallel with the central axis of the suction catheter body. The number of the liquid inflow passages 10 provided in the wall of the inner tube is set to 1 or more. The tube wall of the inner tube 8 at the joint of the proximal supporting liquid-passing section 4 and the distal flexible section 5 is provided with a liquid inflow port 6 for communicating a liquid inflow channel 10 in the tube wall of the inner tube 8 with the tube cavity of the inner tube 8.
The invention relates to a using process of an intracranial thrombus aspiration catheter device, which comprises the following steps: the suction port 1 is connected with an external negative pressure source; the injection liquid communication interface 2 can be connected with the external liquid through a needleless connector or directly. When in suction, the injector is used simultaneously, and liquid such as physiological saline, thrombolytic reagent or developing agent is injected to the far end of the suction cavity through the injection liquid communication interface 2 and the liquid inflow channel 10, so that the blood outflow condition and the thrombus extraction condition are judged, or only contrast agent is injected after the suction is stopped. 1) During suction, the physiological saline, thrombolytic drugs and the like can be injected from the far end through the injection or self-suction of the inner tube liquid inflow channel 10, so that the blood viscosity in the inner tube can be reduced, the flow state of fluid flowing in the catheter can be changed, the high blood viscosity and the blood viscosity of the catheter wall can be reduced, and the direct suction force to thrombus can be increased; 2) when the thrombus can not be determined to be extracted, the position of the thrombus can be judged by injecting a contrast medium through the inner-layer tube liquid inflow channel 10, and a doctor judges whether to continuously suck or stop sucking so as to avoid other postoperative complications caused by the fact that the thrombus is shifted to other blood vessels due to injection of the contrast medium when the thrombus is not completely extracted; and can accelerate the operation process. 3) The invention increases the pushing performance of the catheter under the condition of not reducing the diameter of the suction cavity, so that the catheter can smoothly reach the position of lesion.
The main structure of the invention mainly comprises two parts: the suction catheter comprises a suction catheter body and a three-way Y-shaped handle, wherein the suction catheter is similar to a common braided tube at present in structure and comprises an inner layer tube and an outer layer tube;
the invention has the characteristics on the structural design that: 1. the coaxial multi-channel design of a large inner cavity; 2. the external liquid inflow channel can be directly connected with the suction channel; 3. the inflow liquid channel is arranged at the proximal end supporting section of the inner layer tube of the braided tube; 4. the liquid inflow channel is connected with the outside and the suction cavity; 5. the liquid inflow channel can be composed of 1-6 channels at the inner layer pipe; 6. the suction catheter is designed into a proximal supporting liquid-passing section and a distal flexible section, the length of the proximal supporting section is 1200mm, the length of the distal flexible section is 50-300mm, and the total length is 1500 mm; 7. the liquid inflow channel is connected with the outside through an extension section; 8. the liquid injected into the suction cavity through the liquid inflow channel is physiological saline, thrombolytic drugs, contrast agents and other liquids capable of reducing blood viscosity.
Example 1.
1. The self-suction catheter consists of a three-way Y-shaped handle and a suction catheter, and the suction catheter is of a coaxial multi-cavity structure; the suction catheter body comprises an outer layer pipe 7, a reinforcing layer 9 and an inner layer pipe 8; a reinforcing layer 9 is arranged between the outer layer pipe 7 and the inner layer pipe 8;
2. the suction catheter consists of a near-end liquid-flowing supporting section and a far-end flexible section;
3. the near end is communicated with a liquid inflow port on the extension section of the braided tube of the suction catheter through a Y-shaped handle side hole;
4. the liquid inflow channel is provided with 2 channels in the inner layer pipe and is respectively communicated with the inner cavity of the suction catheter at the joint of the support section and the flexible section;
5. the length of the proximal supporting liquid passage is 1200mm, and the length of the distal flexible section is 50 mm;
example 2.
1. The self-suction catheter consists of a three-way Y-shaped handle and a suction catheter, and the suction catheter is of a coaxial multi-cavity structure;
2. the suction catheter consists of a near-end liquid-flowing supporting section and a far-end flexible section;
3. the near end is communicated with a liquid inflow port on the extension section of the braided tube through a Y-shaped handle side hole;
4. the liquid inflow channel is provided with 3 channels in the inner layer pipe and is respectively communicated with the inner cavity of the suction catheter at the joint of the support section and the flexible section;
5. the length of the proximal supporting liquid passage is 1000mm, and the length of the distal flexible section is 300 mm;
example 3.
1. The self-suction catheter consists of a three-way Y-shaped handle and a suction catheter, and the suction catheter is of a coaxial multi-cavity structure;
2. the suction catheter consists of a near-end liquid-flowing supporting section and a far-end flexible section;
3. the near end is communicated with a liquid inflow port on the extension section of the braided tube through a Y-shaped handle side hole;
4. the liquid inflow channel is provided with 5 channels in the inner layer pipe and is respectively communicated with the inner cavity of the suction catheter at the joint of the support section and the flexible section;
5. the proximal supporting channel has a length of 700mm and the distal flexible section has a length of 200 mm.
While the invention has been described with respect to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. Those skilled in the art can make various changes, modifications and equivalent arrangements, which are equivalent to the embodiments of the present invention, without departing from the spirit and scope of the present invention, and which may be made by utilizing the techniques disclosed above; meanwhile, any changes, modifications and variations of the above-described embodiments, which are equivalent to those of the technical spirit of the present invention, are within the scope of the technical solution of the present invention.
Claims (7)
1. An intracranial thrombus aspiration catheter device; the method is characterized in that: comprises a suction catheter body and a handle; the suction catheter body comprises an outer layer pipe and an inner layer pipe; a liquid inflow channel is arranged in the pipe wall of the inner layer pipe and is communicated with the pipe cavity of the inner layer pipe; the handle is a three-way Y-shaped handle; the handle is provided with a suction port and an injection communicating interface which are connected with an external negative pressure source.
2. An intracranial thrombectomy catheter device as recited in claim 1, wherein: one end of the handle, which is far away from the suction catheter, is provided with an injection communicating interface, the other end of the handle is connected with the suction catheter, and a liquid inflow port is arranged at the connecting part; the injection liquid communication interface is connected with the liquid inflow channel through a liquid inflow port.
3. An intracranial thrombectomy catheter device as recited in claim 2, wherein: one end of the suction catheter body, which is close to an operator, is provided with a near-end supporting liquid passing section, and a liquid inflow channel is arranged in the tube wall of the inner layer tube of the suction catheter, which is provided with the near-end supporting liquid passing section.
4. An intracranial thrombectomy catheter device according to claim 3, wherein: the end of the suction catheter body, which is far away from an operator, is provided with a far-end flexible section, and the suction catheter of the far-end flexible section consists of an outer layer tube and an inner layer tube.
5. An intracranial thrombectomy catheter device as recited in claim 4, wherein: the liquid inflow channel arranged in the tube wall of the inner tube is parallel to the central axis of the suction catheter body.
6. An intracranial thrombectomy catheter device according to claim 5, wherein: the number of liquid inflow channels arranged in the pipe wall of the inner layer pipe is more than or equal to 1.
7. An intracranial thrombectomy catheter device according to claim 6, wherein: and a liquid inflow port for communicating a liquid inflow channel in the tube wall of the inner tube with the tube cavity of the inner tube is arranged on the tube wall of the inner tube at the joint of the near-end supporting liquid-passing section and the far-end flexible section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210019803.6A CN114246637A (en) | 2020-11-05 | 2020-11-05 | Intracranial thrombus suction catheter device |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011220923.XA CN112370116A (en) | 2020-11-05 | 2020-11-05 | Self-suction type intracranial thrombus suction catheter device |
| CN202210019803.6A CN114246637A (en) | 2020-11-05 | 2020-11-05 | Intracranial thrombus suction catheter device |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011220923.XA Division CN112370116A (en) | 2020-11-05 | 2020-11-05 | Self-suction type intracranial thrombus suction catheter device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114246637A true CN114246637A (en) | 2022-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011220923.XA Pending CN112370116A (en) | 2020-11-05 | 2020-11-05 | Self-suction type intracranial thrombus suction catheter device |
| CN202210019803.6A Pending CN114246637A (en) | 2020-11-05 | 2020-11-05 | Intracranial thrombus suction catheter device |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011220923.XA Pending CN112370116A (en) | 2020-11-05 | 2020-11-05 | Self-suction type intracranial thrombus suction catheter device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023236743A1 (en) * | 2022-06-10 | 2023-12-14 | 上海博畅医疗科技有限公司 | Medical catheter |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113729855B (en) * | 2021-08-30 | 2023-11-14 | 浙江清华柔性电子技术研究院 | Interventional combined ultrasonic thrombolysis device |
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| CN2889337Y (en) * | 2006-02-16 | 2007-04-18 | 微创医疗器械(上海)有限公司 | Microtube |
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2020
- 2020-11-05 CN CN202011220923.XA patent/CN112370116A/en active Pending
- 2020-11-05 CN CN202210019803.6A patent/CN114246637A/en active Pending
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| CN102319097A (en) * | 2011-08-04 | 2012-01-18 | 东莞永胜医疗制品有限公司 | Thrombus aspiration catheter and method of use thereof |
| JP2013154171A (en) * | 2012-01-26 | 2013-08-15 | Covidien Lp | Thrombectomy catheter system |
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| WO2023236743A1 (en) * | 2022-06-10 | 2023-12-14 | 上海博畅医疗科技有限公司 | Medical catheter |
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| CN112370116A (en) | 2021-02-19 |
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