Thrombus negative pressure suction device and system
By designing a thrombus negative pressure aspiration device with multiple syringes and control valves, the problem of reduced negative pressure caused by syringe leakage was solved, achieving continuous and efficient thrombus aspiration, reducing the risk of thrombus dislodgement, and improving the success rate of the operation.
Patent Information
- Application Number
- CN202520260003.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-18
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-02-18
AI Technical Summary
Existing syringes are prone to air leakage during prolonged negative pressure aspiration, which reduces the negative pressure and makes it impossible to continuously aspirate thrombi, leading to thrombus detachment and escape.
Design a thrombus negative pressure aspiration device, using at least two syringes and a control valve. The control valve switches the connection state between different syringes and the aspiration catheter to ensure that the distal end of the aspiration catheter always maintains a high negative pressure.
By switching syringes to maintain high negative pressure, thrombi are continuously aspirated, reducing the risk of thrombus detachment and escape, improving the success rate of the surgery and reducing the operation time.
Smart Images
Figure CN223715773U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to medical instrument technical field, concretely relates to a thrombus negative pressure suction device and system. BACKGROUND
[0002] The key to treat acute ischemic stroke is to open the occluded blood vessel as soon as possible, reduce mortality and disability rate. There are many treatment methods for acute intracranial blood vessel occlusion, including suction thrombectomy and stent thrombectomy. Suction thrombectomy can significantly improve the clinical prognosis of patients with acute intracranial blood vessel occlusion, and its technical requirements are relatively simple. As long as the suction catheter is guided to the closed place, negative pressure suction can be carried out, the occluded blood vessel can be opened in the shortest time, and the cerebral perfusion of ischemic disease is restored, so it is widely applied. Moreover, when using the same suction catheter, the greater the negative pressure generated at the proximal end of the thrombus, the greater the force to remove the thrombus, and in principle, it is easier to deform and remove the thrombus.
[0003] The syringe is a commonly used suction negative pressure device, which has the advantages of: more convenient to use, no need to carry, connect, open the device and other operations, lower cost, etc. However, when the thrombus is stuck in the suction catheter port during the operation, it needs to be suctioned for a longer time to deform the thrombus, and finally the thrombus is suctioned into the suction catheter, or the thrombus is continuously sucked out of the body together with the suction catheter. However, when the syringe maintains a long time of negative pressure suction, air leakage is easy to occur with the passage of time, the negative pressure will gradually decrease, and even the negative pressure may decrease to a certain extent and cannot continue to suck the thrombus, resulting in thrombus shedding and escape. UTILITY MODEL CONTENTS
[0004] Therefore, the technical problem to be solved by the utility model is that the syringe in the prior art is easy to leak air when maintaining a long time of negative pressure suction, the negative pressure will gradually decrease, and even the negative pressure may decrease to a certain extent and cannot continue to suck the thrombus, resulting in thrombus shedding and escape, so as to provide a thrombus negative pressure suction device and system.
[0005] To solve the above technical problems, the technical scheme of the utility model is as follows:
[0006] On the one hand, the utility model provides a kind of thrombus negative pressure suction device, comprising: syringe, the syringe is at least provided two;Control valve, at least three connecting heads are provided, one connecting head is used to be connected with the proximal end of suction catheter, and at least two of the remaining connecting heads are respectively connected with syringe;The control valve can be switched to different states to keep different syringes and suction catheters in communication or isolation.
[0007] Further, the injector comprises a first injector and a second injector; the control valve has a first connecting head, a second connecting head and a third connecting head; the first connecting head is used for connecting with a proximal end of the suction catheter; the second connecting head is connected with the first injector; the third connecting head is connected with the second injector; the control valve can be switched to a first state to keep the first injector and the suction catheter in communication and keep the second injector and the suction catheter isolated, or be switched to a second state to keep the first injector and the suction catheter isolated and keep the second injector and the suction catheter in communication.
[0008] Further, the control valve is a plug valve; a male luer connector on the plug valve is used as the first connecting head; two female luer connectors on the plug valve are used as the second connecting head and the third connecting head respectively.
[0009] Further, the injector comprises a core rod, an outer sleeve and a sealing ring; the core rod is pluggably arranged in the outer sleeve, and the sealing ring is arranged at an end of the core rod located in the outer sleeve; when the core rod is pulled outwards, a sealed negative pressure space is formed between the outer sleeve and the end of the core rod.
[0010] Further, a first locking member is arranged on a side wall of the outer sleeve; a second locking member matched with the first locking member is arranged on the core rod; after the core rod is pulled outwards to a target position, the first locking member and the second locking member are locked with each other to limit the core rod from being pulled inwards.
[0011] Further, the first locking member is a locking column arranged on an inner side wall of the outer sleeve; the second locking member is a clamping groove arranged on an outer side wall of the core rod; after the core rod is pulled outwards to the target position, the locking column is clamped into the clamping groove.
[0012] Further, a scale mark is arranged on an outer side wall of the outer sleeve; a position of the first locking member corresponds to a maximum scale of the scale mark.
[0013] In another aspect, the utility model also provides a thrombus negative pressure suction system, including the thrombus negative pressure suction device of any one of the above, still include suction catheter;One of the connecting heads of the control valve is connected with the proximal end of the suction catheter.
[0014] The technical scheme of the utility model has the following advantages:
[0015] The thrombus negative pressure suction device provided by the utility model can switch to another syringe to continue suctioning immediately through the control valve if one syringe causes the negative pressure to drop due to liquid entering or air leakage during thrombus suctioning, so that the distal end of the suction catheter can always maintain high negative pressure through back-and-forth switching, thereby continuously attracting thrombus, reducing the risk of thrombus escape, reducing the operation time and improving the operation success rate. BRIEF DESCRIPTION OF DRAWINGS
[0016] In order to more clearly illustrate the technical scheme in the specific embodiment of the utility model or the prior art, the drawings needed to be used in the specific embodiment or the prior art description will be briefly introduced as follows, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.
[0017] Figure 1 It is a schematic view of the thrombus negative pressure suction device in the embodiment of the utility model;
[0018] Figure 2 It is a schematic view of the control valve in the thrombus negative pressure suction device in the embodiment of the utility model;
[0019] Figure 3 It is a schematic view of the syringe in the thrombus negative pressure suction device in the embodiment of the utility model.
[0020] EXPLANATION OF REFERENCE NUMERALS:
[0021] 1, control valve; 2, first syringe; 3, second syringe; 4, first connecting head; 5, second connecting head; 6, third connecting head; 7, valve body; 8, valve core; 9, outer sleeve; 10, core rod; 11, sealing ring; 12, first locking part. DETAILED DESCRIPTION
[0022] The technical scheme of the utility model will be described clearly and completely in combination with the drawings, and obviously, the described embodiments are some embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.
[0023] In the description of the utility model, it needs to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicating or implying that the indicated device or element must have a specific orientation, a specific orientation and operation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" and "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0024] In the description of the utility model, it needs to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicating or implying that the indicated device or element must have a specific orientation, a specific orientation and operation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" and "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0025] In addition, the technical features involved in the different embodiments of the utility model described below can be combined with each other as long as there is no conflict.
[0026] As Figure 1 As shown in the figure, the embodiment provides a thrombus negative pressure suction device, comprising: a syringe, the syringe is provided with at least two, for example, two syringes can be provided, or more than two syringes can be provided;Control valve 1 has at least three connecting heads, one of which is used to be connected with the proximal end of the suction catheter, and at least two of the remaining connecting heads are connected with the syringe respectively;For example, the control valve 1 can have three connecting heads, or more than three connecting heads, the number of connecting heads is one more than the number of syringes, so that each connecting head is connected with a syringe except the connecting head used to be connected with the suction catheter. The control valve 1 can be switched to different states to keep different syringes in communication or isolation with the suction catheter, for example, the control valve 1 can be a plug valve, or other electronic control valve 1. When in use, the control valve 1 can keep one syringe in communication with the suction catheter, and the remaining syringes are in a blocked state.
[0027] The thrombus negative pressure suction device provided by the embodiment can keep the distal end of the suction catheter in high negative pressure at all times by switching back and forth when one syringe causes the negative pressure to drop due to liquid entering or air leakage during thrombus suction, so as to continuously attract thrombus, reduce the risk of thrombus escape, reduce the operation time and improve the operation success rate.
[0028] Preferably, two injectors are provided, namely a first injector 2 and a second injector 3; the control valve 1 has three connecting heads, namely a first connecting head 4, a second connecting head 5 and a third connecting head 6; the first connecting head 4 is used to connect with the proximal end of the aspiration catheter; the second connecting head 5 is connected with the first injector 2; the third connecting head 6 is connected with the second injector 3; the control valve 1 can be switched to a first state to keep the first injector 2 and the aspiration catheter in communication and keep the second injector 3 and the aspiration catheter isolated, or switched to a second state to keep the first injector 2 and the aspiration catheter isolated and keep the second injector 3 and the aspiration catheter in communication.
[0029] As shown in Figure 2 , the control valve 1 is a plug valve, which can be a plug valve in the prior art, and the valve body 7 is provided with a connecting screw port, and the type of the screw port can be a male Luer connector and a female Luer connector. The inside of the valve body 7 is provided with a valve core 8, and the outside of the valve body 7 is provided with a rotary knob switch, which can control the opening or closing of the valve core 8 inside. The male Luer connector on the plug valve serves as the first connecting head 4; the two female Luer connectors on the plug valve serve as the second connecting head 5 and the third connecting head 6, respectively. When installed, the male Luer connector on the plug valve is connected with the aspiration catheter, and the female Luer connectors on the plug valve are connected with the first injector 2 and the second injector 3. When thrombus aspiration is performed, if the first injector 2 causes the negative pressure to drop due to liquid inflow or air leakage, the rotary knob switch on the valve body 7 can be turned to immediately switch to the second injector 3 for continuous aspiration.
[0030] As shown in Figure 3 , the injector includes a core rod 10, an outer sleeve 9 and a sealing ring 11; for example, the injector can adopt an existing injector, the core rod 10 is pluggably arranged in the outer sleeve 9, and a plurality of side wings can be arranged at intervals along the circumferential direction of the core rod 10. The sealing ring 11 is arranged at the end of the core rod 10 located in the outer sleeve 9, and the outer side wall of the sealing ring 11 and the inner side wall of the outer sleeve 9 are in close contact with each other to ensure the sealing effect; when the core rod 10 is pulled outwards, a sealed negative pressure space is formed between the outer sleeve 9 and the end of the core rod 10.
[0031] The side wall of the outer sleeve 9 is provided with a first locking piece 12; the core rod 10 is provided with a second locking piece matched with the first locking piece 12, and the first locking piece 12 and the second locking piece are locked with each other after the core rod 10 is pulled out to a target position, so as to limit the core rod 10 from being pulled in. For example, the first locking piece 12 and the second locking piece can adopt a locking structure of a locking column and a clamping groove, or other clamping structures, as long as the relative fixation between the core rod 10 and the outer sleeve 9 can be realized. In this way, the core rod 10 does not need to be pulled out all the time during suction, and the use is more convenient and labor-saving.
[0032] For example, the first locking piece 12 can be a locking column arranged on the inner side wall of the outer sleeve 9; the second locking piece can be a clamping groove arranged on the outer side wall of the core rod 10, for example, the clamping groove can be arranged on the side wing of the core rod 10. In the initial state, the locking column is located between two adjacent side wings. When the core rod 10 is pulled out to the target position, the core rod 10 can be rotated to align the side wing with the clamping groove with the locking column, and then the locking column is clamped into the clamping groove.
[0033] For another example, the first locking piece 12 can also be a first protrusion arranged on the inner side wall of the outer sleeve 9, and the end of the first protrusion away from the outer sleeve 9 is a curved surface structure; the second locking piece can be a second protrusion arranged on the outer side wall of the core rod 10, and the side of the second protrusion away from the core rod 10 is an inclined surface, and the distance between the inclined surface and the core rod 10 gradually decreases in the direction away from the sealing ring 11. When the core rod 10 is pulled out to approach the target position, the first protrusion slides along the inclined surface of the second protrusion, and until the core rod 10 is pulled out to the target position, the first protrusion slides off the inclined surface of the second protrusion, and at this time, the side wall of the second protrusion abuts against the first protrusion.
[0034] The outer side wall of the outer sleeve 9 is provided with a scale mark, for example, the maximum scale mark can be 60ml, and the position of the first locking piece 12 can correspond to the maximum scale of the scale mark.
[0035] On the other hand, the utility model also provides a kind of thrombus negative pressure suction system, including the thrombus negative pressure suction device of any one described above, still including suction catheter;One of the connection head of the control valve 1 is connected with the proximal end of the suction catheter.
[0036] In summary, compared with using a single syringe to suck, the thrombus negative pressure suction device in the present application can switch the syringe back and forth to suck, thereby stably and continuously providing negative high pressure to the distal end of the suction catheter, continuously attracting thrombus, reducing the risk of thrombus falling off and escaping, and improving the success rate of surgery.
[0037] Compared with the use of a suction pump for suction, the thrombus negative pressure suction device in the application is more simple, convenient and economical, reduces the operation time of the operator, and also reduces the medical cost of the patient.
[0038] Obviously, the above embodiments are only examples for clearly illustrating, but not limitation to the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments need not and cannot be exhausted. The obvious changes or variations derived therefrom are still within the protection scope of the utility model.
Claims
1. A thrombus negative pressure aspiration device, characterized by, The application relates to a negative pressure thrombus suction device. The application comprises: a syringe, which is provided with at least two; a control valve (1) having at least three connecting heads, one of which is used for being connected with the proximal end of a suction catheter, and the remaining two are respectively connected with the syringes; the control valve (1) can be switched to different states to keep different syringes in communication or isolation with the suction catheter.
2. The negative pressure thrombus suction device according to claim 1, wherein the syringe comprises a first syringe (2) and a second syringe (3); the control valve (1) has a first connecting head (4), a second connecting head (5) and a third connecting head (6); the first connecting head (4) is used for being connected with the proximal end of the suction catheter; the second connecting head (5) is connected with the first syringe (2); the third connecting head (6) is connected with the second syringe (3); the control valve (1) can be switched to a first state to keep the first syringe (2) in communication with the suction catheter and the second syringe (3) in isolation with the suction catheter, or be switched to a second state to keep the first syringe (2) in isolation with the suction catheter and the second syringe (3) in communication with the suction catheter.
3. The negative pressure thrombus suction device according to claim 2, wherein the control valve (1) is a plug valve; the male luer connector on the plug valve is used as the first connecting head (4); the two female luer connectors on the plug valve are respectively used as the second connecting head (5) and the third connecting head (6).
4. The negative pressure thrombus suction device according to claim 1, wherein the syringe comprises a plunger (10), a sleeve (9) and a sealing ring (11); the plunger (10) is pluggably arranged in the sleeve (9), and the sealing ring (11) is arranged at the end of the plunger (10) located in the sleeve (9); when the plunger (10) is pulled outwards, a sealed negative pressure space is formed between the sleeve (9) and the end of the plunger (10).
5. The negative pressure thrombus suction device according to claim 4, wherein a first locking member (12) is arranged on the side wall of the sleeve (9); a second locking member is arranged on the plunger (10) and matched with the first locking member (12); after the plunger (10) is pulled outwards to a target position, the first locking member (12) and the second locking member are locked with each other to limit the plunger (10) from being pulled inwards.
6. The negative pressure thrombus suction device according to claim 5, wherein the first locking member (12) is a locking column arranged on the inner side wall of the sleeve (9); the second locking member is a clamping groove arranged on the outer side wall of the plunger (10); after the plunger (10) is pulled outwards to the target position, the locking column is clamped into the clamping groove.
7. The negative pressure thrombus suction device according to claim 5, wherein a scale mark is arranged on the outer side wall of the sleeve (9); the position of the first locking member (12) corresponds to the maximum scale of the scale mark.
8. A thrombus negative pressure aspiration system, characterized by, The thrombus negative pressure suction device according to any one of claims 1-7, further comprising a suction catheter; One of the connecting heads of the control valve (1) is connected with the proximal end of the suction catheter.