Thrombus aspiration catheter
The design of the thrombus aspiration catheter, which combines a double-layer structure with a combination of rigid and flexible materials, solves the problems of easy twisting and inability to conduct synchronous angiography during insertion, and enables real-time monitoring of the thrombus aspiration process and reduces blood waste.
Patent Information
- Application Number
- CN202422618651.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2025-10-24
- Estimated Expiration
- 2034-10-29
AI Technical Summary
Existing thrombus aspiration catheters are prone to kinking or twisting during insertion into the coronary artery ostium, and angiography cannot be performed simultaneously during aspiration to check the aspiration effect, resulting in blood waste.
A double-layered thrombus aspiration catheter was designed. The inner tube is used for thrombus aspiration, while the outer tube contains a drug delivery lumen that allows for the infusion of contrast agents for real-time angiography during aspiration. The outer tube design, which combines rigid and soft segments, provides support to ensure the catheter is successfully inserted into the blood vessel.
This allows for simultaneous angiography during thrombus aspiration, reducing blood waste, simplifying catheter insertion, and ensuring a smooth procedure.
Smart Images
Figure CN223464079U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of thrombus suction catheter, especially a thrombus suction catheter. BACKGROUND
[0002] At present, in clinic, the most commonly used method for treating acute ST segment elevation myocardial infarction is to carry out emergency PCI, and emergency PCI is also called emergency percutaneous coronary intervention. During the operation, the patient with heavy thrombus load can be subjected to thrombus suction. In the past, the head of the suction catheter was implanted into the proximal end of the occluded blood vessel, and a negative pressure syringe was connected to the tail. After the head of the suction catheter was in place, the valve was opened, and the thrombus in the coronary artery was sucked by using negative pressure, so as to achieve the purpose of removing the thrombus.
[0003] During the clinical operation of thrombus suction, there may be some problems. First, the pipe body of the suction catheter is relatively soft, especially the large-diameter suction catheter, which is prone to folding or twisting during the process of being sent into the specified coronary orifice along the guide pipe. Second, the suction effect cannot be checked at the same time during the suction process. If the suction effect is determined through angiography, the suction catheter needs to be completely withdrawn from the guide pipe, which is complicated. Since the existing suction catheter is a single pipe, the suction effect cannot be checked at the same time during the suction process. If 200 milliliters of blood is required to be sucked according to the specified operation specification, i.e. 4 tubes of 50 milliliters of blood, but most of the thrombus of the patient is often in the first two tubes of blood, and the blood sucked by the last two tubes is invalid suction, resulting in waste of the patient's blood.
[0004] The utility model is proposed in view of the deficiencies of the prior art. UTILITY MODEL CONTENT
[0005] The utility model aims at solving at least one of the above technical problems, and proposes a thrombus suction catheter.
[0006] The utility model solves the technical problems by adopting the technical scheme of:
[0007] A thrombus suction catheter, comprising a pipe body, the pipe body comprising an inner layer pipe and an outer layer pipe arranged outside the inner layer pipe, a thrombus suction cavity is arranged in the inner layer pipe, a drug delivery cavity is arranged between the inner layer pipe and the outer layer pipe, the thrombus suction cavity and the drug delivery cavity respectively extend from the proximal end of the pipe body to the distal end of the pipe body, and drug output ports in communication with the drug delivery cavity are arranged on the upper and lower sidewalls of the outer layer pipe close to the distal end of the pipe body.
[0008] The thrombus suction catheter as described above, the inner layer tube is provided with a thrombus input port at the distal end of the tube body, a suction device interface at the proximal end of the tube body, the thrombus input port, the thrombus suction cavity and the suction device interface are communicated, and the suction device interface is used for connecting an external suction device; the outer layer tube is provided with a drug input port communicated with the drug delivery cavity, and the drug input port is arranged close to the proximal end of the tube body.
[0009] The thrombus suction catheter as described above, from the proximal end of the tube body to the distal end of the tube body, the drug input port is located in front of the suction device interface, and a connecting tube is arranged at the drug input port, and the connecting tube is used for connecting an external drug delivery device.
[0010] The thrombus suction catheter as described above, the outer layer tube is provided with a guide wire exchange tube, the guide wire exchange tube is arranged close to the distal end of the tube body, the guide wire exchange tube is located on one side of the thrombus input port and away from the drug output port, and the guide wire exchange tube is provided with a guide wire exchange cavity located outside the tube body.
[0011] The thrombus suction catheter as described above, the guide wire exchange tube is provided with a mark section, the mark section is arranged close to the end of the guide wire exchange tube, from the proximal end of the tube body to the distal end of the tube body, the mark section is located in front of the thrombus input port, and the mark section is arranged as a radio-opaque section.
[0012] The thrombus suction catheter as described above, the outer layer tube comprises a soft suction section and a hard tube body section connected with each other, the hard tube body section is located between the soft suction section and the drug input port, the soft suction section is arranged close to the distal end of the tube body, and the hardness of the hard tube body section is greater than that of the soft suction section.
[0013] The thrombus suction catheter as described above, the hard tube body section of the outer layer tube is arranged as a PA / HDPE composite material layer, the soft suction section of the outer layer tube is arranged as a polyamide-polyether block copolymer layer, and the hard tube body section of the outer layer tube is connected with the soft suction section of the outer layer tube.
[0014] The thrombus suction catheter as described above, the inner layer tube is arranged as a polyamide-polyether block copolymer layer.
[0015] The thrombus suction catheter as described above, the inner diameter of the thrombus suction cavity at the distal end of the tube body is greater than the inner diameter of the thrombus suction cavity at the proximal end of the tube body.
[0016] The thrombus suction catheter as described above, the inner diameter of the thrombus suction cavity gradually increases from the proximal end of the tube body to the distal end of the tube body.
[0017] Compared with the prior art, the thrombus suction catheter has the advantages that:
[0018] 1、the thrombus aspiration catheter in the utility model can directly input contrast medium into the inside of blood vessel in the thrombus aspiration process through the drug delivery cavity, and the thrombus position in coronary blood vessel can be radiographed while the thrombus is aspirated, so as to facilitate the synchronous viewing of the thrombus aspiration effect in the coronary blood vessel in the thrombus aspiration process, thereby adjusting the extraction amount of patient blood, reducing the waste of patient blood, and the contrast medium can be injected into the coronary blood vessel without completely withdrawing the aspiration catheter from the guide tube, and the operation is simple;
[0019] 2、the thrombus aspiration catheter in the utility model is provided with the soft aspiration section and the hard pipe body section in the outer tube, the hard pipe body section is hardened, the hardness of the hard pipe body section is greater than that of the soft aspiration section, the hard pipe body section can provide sufficient support force for the soft aspiration section, so as to avoid that the thrombus aspiration catheter is easily folded or twisted when being manually sent into the blood vessel by medical staff, reduce the difficulty of manually inserting the thrombus aspiration catheter into the target blood vessel, thereby facilitating the delivery of the thrombus aspiration catheter to the thrombus position in the coronary blood vessel, and guaranteeing the smooth progress of the thrombus aspiration operation.
[0020] The utility model will be further described below in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS
[0021] Figure 1 It is the stereogram of the thrombus aspiration catheter of the utility model Figure 1 .
[0022] Figure 2 It is the enlarged view of A part in the utility model Figure 1 .
[0023] Figure 3 It is the B-B sectional view in the utility model Figure 2 .
[0024] Figure 4 It is the internal structure diagram of A part after enlargement in the utility model Figure 1 .
[0025] Figure 5 It is the internal structure diagram of C part after enlargement in the utility model (hides external aspiration equipment and external drug delivery equipment) Figure 1 .
[0026] Figure 6 It is the stereogram of the thrombus aspiration catheter of the utility model Figure 2 . DETAILED DESCRIPTION
[0027] The embodiments of the utility model will be described in detail below in combination with the drawings.
[0028] As Figure 1The utility model provides a kind of thrombus suction catheter as shown in 6, the utility model provides a kind of thrombus suction catheter, including pipe body 100, the pipe body 100 includes inner tube 110 and outer tube 120, the outer tube 120 is arranged at the outside of the inner tube 110, the inner tube 110 is equipped with thrombus suction cavity 111, the thrombus suction cavity 111 is used for thrombus to pass, and the thrombus suction cavity 111 both ends can be communicated outside, drug delivery cavity 121 is equipped between the inner tube 110 and outer tube 120, the drug delivery cavity 121 is used for delivery contrast medium, and the drug delivery cavity 121 both ends can be communicated outside, the thrombus suction cavity 111 and drug delivery cavity 121 respectively from the proximal end 101 of the pipe body 100 extend to the distal end 102 of the pipe body 100, in actual application, the proximal end 101 of the pipe body 100 is equivalent to the operating end of operator, and the proximal end 101 of the pipe body 100 is left outside human body when operating, the distal end 102 of the pipe body 100 is equivalent to one end of intervention human body and into to the thrombus position in coronary vessel;The upper and lower two side walls of the outer tube 120 close to the distal end 102 are equipped with drug output port 122 communicated with the drug delivery cavity 121;Through the drug delivery cavity 121, contrast medium can be directly input to the inside of coronary vessel during thrombus suction process, and thrombus position in coronary vessel can be radiographed while sucking thrombus, to facilitate synchronous viewing thrombus suction effect in coronary vessel during thrombus suction process, to adjust the extraction amount of patient blood, reduce patient blood waste, and without needing to inject contrast medium into blood vessel by completely withdrawing suction catheter from guide tube, simple operation is achieved.In addition, contrast medium is delivered to thrombus position in human coronary vessel by the drug output port 122, and contrast medium is not suitable for excess, and excess contrast medium can cause patient to appear arrhythmia such as palpitation, chest distress, therefore, two drug output ports 122 are respectively arranged in the upper and lower two side walls of the outer tube 120 close to the distal end 102 of the pipe body 100, the drug output port 122 in the upper and lower two side walls of the outer tube 120 respectively corresponds to the inner wall of blood vessel on both sides of thrombus suction catheter, to improve radiography effect, and reduce risk to patient on the basis of realizing coronary angiography purpose.
[0029] In the present embodiment, as Figure 4 and Figure 5As shown, the inner layer tube 110 is provided with a thrombus input port 112 at the distal end 102 of the tube body 100, and a suction device interface 113 at the proximal end 101 of the tube body 100, the thrombus input port 112, the thrombus suction cavity 111 and the suction device interface 113 are in communication, and the suction device interface 113 is used to connect an external suction device 200; the external suction device 200 includes a first syringe, when the distal end 102 of the tube body 100 enters the thrombus position in the blood vessel, the medical staff can generate negative pressure in the thrombus suction cavity 111 through the first syringe, so that the thrombus in the blood vessel can enter the thrombus suction cavity 111 through the thrombus input port 112, and the thrombus moves along the thrombus suction cavity 111 from the distal end 102 of the tube body 100 to the proximal end 101 of the tube body 100 under the suction force, and finally the thrombus enters the first syringe and is separated from the human body.
[0030] In this embodiment, as shown in Figure 1 and Figure 5 As shown, the outer side of the outer layer tube 120 is provided with a drug input port 123 in communication with the drug delivery cavity 121, and the drug input port 123 is arranged close to the proximal end 101 of the tube body 100; the drug input port 123 can be connected to an external drug delivery device 300, and the external drug delivery device 300 includes a second syringe, when the distal end 102 of the tube body 100 enters the thrombus position in the blood vessel and the thrombus is aspirated by the external suction device 200, the medical staff can inject contrast medium into the drug delivery cavity 121 through the second syringe, and the contrast medium is delivered along the drug delivery cavity 121 from the proximal end 101 of the tube body 100 to the distal end 102 of the tube body 100, and enters the thrombus position in the blood vessel through the drug output port 122, so that the medical staff can directly view the thrombus aspiration effect through the corresponding medical imaging technology, which is beneficial to the medical staff to adjust the amount of blood drawn from the patient, reduce the waste of blood of the patient, and the thrombus aspiration catheter of this embodiment can perform angiography on the thrombus position in the blood vessel while aspirating the thrombus, without the need to completely withdraw the aspiration catheter from the guide tube to inject contrast medium into the coronary blood vessel, and the operation is simple.
[0031] It should be noted that in the actual thrombus aspiration process, the flow directions of the substances in the thrombus suction cavity 111 and the drug delivery cavity 121 are opposite.
[0032] In some embodiments, as shown in Figure 5As shown, the drug input port 123 is located on the front side of the suction device interface 113, i.e. the suction device interface 113 is close to the proximal end 101 of the tube body 100, and the suction device interface 113 is between the drug input port 123 and the proximal end 101 of the tube body 100, by staggering the drug input port 123 and the suction device interface 113, the thrombus suction action and the contrast agent injection action are avoided from affecting each other, and the safety of thrombus suction is ensured; further, the drug input port 123 is provided with a connecting pipe 130, and the connecting pipe 130 is used to connect an external drug delivery device 300; by connecting the external drug delivery device 300 through the connecting pipe 130, it is beneficial to manually inject contrast agent without affecting the normal suction of thrombus, thereby ensuring the safety of the patient's operation.
[0033] Further, in the present embodiment, as shown in Figure 1 and Figure 4 As shown, the outer layer pipe 120 is provided with a guide wire exchange pipe 140 outside, the guide wire exchange pipe 140 is close to the distal end 102 of the tube body 100, and the guide wire exchange pipe 140 is located on the side of the thrombus input port 112 and away from the drug output port 122, and the guide wire exchange pipe 140 is provided with a guide wire exchange cavity 141 outside the tube body 100. Both ends of the guide wire exchange cavity 141 can be communicated with the outside for the guide wire to pass through, and the guide wire exchange pipe 140 is used to guide the thrombus suction catheter to pass along the guide wire into the thrombus position in the blood vessel. During the thrombus suction process, under the guidance of fluoroscopy or X-ray, the guide wire is first confirmed to be accurately placed in the target blood vessel, and then the thrombus suction catheter is gently and slowly inserted along the guide wire through the guide wire exchange cavity 141. A channel is established from the puncture site to the thrombus position or through the thrombus position to the distal end 102, so as to provide a clear path and direction for the subsequent suction catheter to be inserted into the thrombus position in the target blood vessel, and therefore by providing the guide wire exchange pipe 140 outside the outer layer pipe 120, it is beneficial to realize the accurate sending of the suction catheter along the guide wire into the thrombus position in the blood vessel.
[0034] Further, in the present embodiment, as shown in Figure 1 and Figure 4As shown, the guide wire exchange tube 140 is provided with a marker segment 150, which is arranged near the end of the guide wire exchange tube 140, from the proximal end 101 of the tube body 100 to the distal end 102 of the tube body 100, the marker segment 150 is located on the front side of the thrombus input port 112, that is, when the thrombus suction catheter is sent into the target blood vessel along the guide wire, the marker segment 150 reaches the thrombus position first compared with the thrombus input port 112, the marker segment 150 is arranged as a radiopaque segment, which refers to a part of the tube body 100 composed of a substance or material that cannot be visible or has a very low degree of visibility under X-ray or other radioactive ray irradiation. Optionally, the radiopaque segment is arranged as a coating containing a radiopaque substance, which clearly shows the condition of the thrombus suction catheter in the blood vessel under X-ray or other radioactive ray irradiation, which helps medical staff to observe and monitor the position and shape of the thrombus suction catheter in the blood vessel.
[0035] In some embodiments, as shown, Figure 6 As shown, in order to improve the stability of the thrombus suction catheter sent into the blood vessel along the guide wire, the outer layer tube 120 includes a soft suction segment 160 and a hard tube body segment 170 connected together, the hard tube body segment 170 is located between the soft suction segment 160 and the drug input port 123, the soft suction segment 160 is arranged near the distal end 102 of the tube body 100, and the hardness of the hard tube body segment 170 is greater than that of the soft suction segment 160. Generally, the thrombus suction catheter is manually sent into the target blood vessel along the guide wire, so it needs to be gently and slowly sent into the thrombus suction catheter by medical staff, which requires high skill of medical staff, if the medical staff pushes the thrombus suction catheter with greater force or faster, it will cause the thrombus suction catheter to be easily folded or twisted. The thrombus suction catheter of the present embodiment is provided with the soft suction segment 160 and the hard tube body segment 170 in the tube body 100, and the hard tube body segment 170 is hardened, so that the hardness of the hard tube body segment 170 is greater than that of the soft suction segment 160. The hard tube body segment 170 can provide sufficient support force for the soft suction segment 160 to avoid the thrombus suction catheter being easily folded or twisted when manually sent into the blood vessel by medical staff, which reduces the difficulty of manually inserting the thrombus suction catheter into the target blood vessel, thereby facilitating the thrombus suction catheter to be delivered to the thrombus position in the blood vessel, and ensuring the smooth progress of the thrombus suction operation.
[0036] In some embodiments, the soft suction segment 160 is arranged at the distal end 102 of the tube body 100, the hard tube body segment 170 is arranged at the proximal end 101 of the tube body 100, and the soft suction segment 160 and the hard tube body segment 170 are arranged in a ratio of 2:5 in the tube body 100.
[0037] Further, in the embodiment, the hard tube body section 170 of the outer layer tube 120 is provided as a PA / HDPE composite material layer, which is a composite of polyamide and high-density polyethylene. The PA / HDPE composite material layer has excellent mechanical properties, good wear resistance, barrier properties, and processing performance, etc., which is conducive to improving the support force on the soft suction section 160. The soft suction section 160 of the outer layer tube 120 is provided as a polyamide-polyether block copolymer layer. The polyamide-polyether block copolymer layer enables the soft suction section 160 to have sufficient strength while also having good flexibility, facilitating the passage of the soft suction section 160 through a complex blood vessel environment. The polyamide-polyether block copolymer layer has good biological safety, which can reduce the irritation and damage to the inner wall of the blood vessel and reduce the risk of infection for the patient. Further, the hard tube body section 170 of the outer layer tube 120 is connected to the soft suction section 160 of the outer layer tube 120. Preferably, the outer layer tube 120 is integrally formed to avoid gaps in the outer layer tube 120, which can cause the drug delivery lumen 121 to leak contrast medium and affect the health and safety of the patient. The outer layer tube 120 also maintains a smooth outer wall without assembly structures to avoid damaging the inner wall of the blood vessel when the thrombus aspiration catheter is inserted into the blood vessel.
[0038] Further, in the embodiment, the inner layer tube 110 is provided as a polyamide-polyether block copolymer layer. Since the inner layer tube 110 is arranged inside the outer layer tube 120, the support force requirement for the inner layer tube 110 is relatively small relative to the outer layer tube 120. In the manufacture of the thrombus aspiration catheter, the inner layer tube 110 is integrally formed as a polyamide-polyether block copolymer layer to facilitate the integral formation of the inner layer tube 110.
[0039] In some embodiments, the inner diameter of the thrombus aspiration lumen 111 at the distal end 102 of the tube body 100 is larger than the inner diameter of the thrombus aspiration lumen 111 at the proximal end 101 of the tube body 100. By arranging the inner diameter of the thrombus aspiration lumen 111 at the distal end 102 of the tube body 100 to be relatively large, the contact area for aspirating the thrombus can be increased, avoiding the thrombus from being blocked or escaping in the inner layer tube 110, and improving the aspiration effect of the thrombus, thereby solving the problem of thrombus load. By arranging the inner diameter of the thrombus aspiration lumen 111 at the proximal end 101 of the tube body 100 to be relatively small, the thrombus can be aspirated into the external aspiration device 200 faster under the same aspiration pressure, thereby improving the aspiration efficiency of the thrombus.
[0040] In the embodiment, since the pipe body 100 is a double-layer pipe structure, preferably, the inner layer pipe 110 is an integrally formed structure, and the inner diameter of the thrombus suction cavity 111 gradually increases from the proximal end 101 of the pipe body 100 to the distal end 102 of the pipe body 100, so that the inner diameter of the thrombus suction cavity 111 linearly changes, and correspondingly, the outer wall diameter of the inner layer pipe 110 linearly changes along the length direction of the inner layer pipe 110, so as to avoid the outer side of the inner layer pipe 110 from having a convex structure, and to facilitate the smooth delivery of the contrast agent in the drug delivery cavity 121.
[0041] The above is only used for further illustrating the technical content of the present application by means of the embodiments, so as to make the reader more easily understand, but does not represent that the embodiments of the present application are limited to this, and any technical extension or re-creation made according to the present application is protected by the present application. The protection scope of the present application is subject to the claims.
Claims
1. A thrombus aspiration catheter, characterized in that, The application relates to a drug delivery catheter, which comprises a catheter body (100), wherein the catheter body (100) comprises an inner layer pipe (110) and an outer layer pipe (120) arranged outside the inner layer pipe (110), a thrombus suction cavity (111) is arranged in the inner layer pipe (110), a drug delivery cavity (121) is arranged between the inner layer pipe (110) and the outer layer pipe (120), the thrombus suction cavity (111) and the drug delivery cavity (121) respectively extend from a proximal end (101) of the catheter body (100) to a distal end (102) of the catheter body (100), and drug output ports (122) in communication with the drug delivery cavity (121) are arranged on the upper and lower side walls of the outer layer pipe (120) close to the distal end (102) of the catheter body (100).
2. A thrombus suction catheter as defined in claim 1, wherein, The inner layer pipe (110) is provided with a thrombus input port (112) located at the distal end (102) of the catheter body (100) and a suction device interface (113) located at the proximal end (101) of the catheter body (100), the thrombus input port (112), the thrombus suction cavity (111) and the suction device interface (113) are in communication, and the suction device interface (113) is used for connecting an external suction device (200). The outer side of the outer layer pipe (120) is provided with a drug input port (123) in communication with the drug delivery cavity (121), and the drug input port (123) is arranged close to the proximal end (101) of the catheter body (100).
3. A thrombus suction catheter as defined in claim 2, wherein, From the proximal end (101) of the catheter body (100) to the distal end (102) of the catheter body (100), the drug input port (123) is located in front of the suction device interface (113), and a connecting pipe (130) is arranged at the drug input port (123), wherein the connecting pipe (130) is used for connecting an external drug delivery device (300).
4. A thrombus suction catheter as defined in claim 2, wherein, The outer side of the outer layer pipe (120) is provided with a guide wire exchange pipe (140), the guide wire exchange pipe (140) is arranged close to the distal end (102) of the catheter body (100), the guide wire exchange pipe (140) is located on one side of the thrombus input port (112) and away from the drug output port (122), and a guide wire exchange cavity (124) located outside the catheter body (100) is arranged in the guide wire exchange pipe (140).
5. A thrombus suction catheter as defined in claim 4, wherein, A mark section (150) is arranged in the guide wire exchange pipe (140), the mark section (150) is arranged close to the end of the guide wire exchange pipe (140), from the proximal end (101) of the catheter body (100) to the distal end (102) of the catheter body (100), the mark section (150) is located in front of the thrombus input port (112), and the mark section (150) is arranged as a radio-opaque section.
6. A thrombus suction catheter as defined in claim 2, wherein, The outer layer tube (120) comprises a soft suction section (160) and a hard body section (170) connected together, the hard body section (170) is located between the soft suction section (160) and the drug input port (123), the soft suction section (160) is arranged close to the distal end (102) of the tube body (100), and the hardness of the hard body section (170) is greater than that of the soft suction section (160).
7. A thrombus suction catheter as defined in claim 6, wherein, The hard body section (170) of the outer layer tube (120) is arranged as a PA / HDPE composite material layer, the soft suction section (160) of the outer layer tube (120) is arranged as a polyamide-polyether block copolymer layer, and the hard body section (170) of the outer layer tube (120) is connected with the soft suction section (160) of the outer layer tube (120).
8. The thrombus suction catheter of claim 1, wherein, The inner layer tube (110) is arranged as a polyamide-polyether block copolymer layer.
9. A thrombus suction catheter according to any one of claims 1-8, characterized in that The inner diameter of the thrombus suction cavity (111) at the distal end (102) of the tube body (100) is greater than the inner diameter of the thrombus suction cavity (111) at the proximal end (101) of the tube body (100).
10. A thrombus suction catheter as defined in claim 9, wherein, The inner diameter of the thrombus suction cavity (111) gradually increases from the proximal end (101) of the tube body (100) to the distal end (102) of the tube body (100).