Blood diversion device for carotid endarterium plaque exfoliation

Abstract

The utility model discloses a blood diversion device for carotid intimal plaque exfoliation, which comprises a connecting tube and intubation tubes arranged at two ends of the connecting tube, the intubation tubes are fixedly connected with the connecting tube, an annular positioning groove is coaxially arranged on the peripheral surface of each intubation tube, the surface of each annular positioning groove is fixedly connected with an air bag, and the air bag is fixedly connected with the connecting tube. An annular positioning groove is formed in the outer circumferential face of the cannula, an air bag is arranged at the annular positioning groove, a pressurizing cavity is coaxially formed in the cannula, and a connecting hole is formed between the pressurizing cavity and the annular positioning groove, the connecting tube is arranged at the two ends of the connecting tube respectively, the cannula is used for being inserted into a blood vessel, and the annular positioning groove is formed in the outer circumferential face of the cannula and provided with the air bag. The pressurizing cavity is formed in the cannula body, compressed air is contained in the pressurizing cavity, the compressed air is conveyed into the annular positioning groove through the connecting hole, the air bag outside the annular positioning groove is expanded, the cannula body and the blood vessel are fixed, the pressurizing cavity is formed in the cannula body, the size of the device is smaller, and operation is convenient and fast.

Description

Technical Field

[0001] The utility model relates to the technical field of intraoperative blood backflow, in particular to a blood diversion device for carotid intimal plaque exfoliation. Background Art

[0002] Carotid intimal plaques are manifestations of carotid atherosclerosis, which are prone to occur at the intersection of the common carotid artery, external carotid artery and internal carotid artery. It is currently believed to be closely related to the occurrence of ischemic stroke in the elderly. The mechanism of ischemic stroke may be: the enlargement of plaques leads to stenosis of the carotid artery, causing intracranial hypoperfusion and plaque shedding to form emboli, leading to intracranial artery embolism. Clinically, the degree of carotid stenosis and the morphological measurement of plaques are used to evaluate carotid plaques and determine their harmfulness. Doctors will decide on surgery based on the degree of vascular stenosis caused by carotid plaques, the stability of the plaques, and the patient's symptoms and basic conditions.

[0003] The surgical removal of the thickened carotid intima and sclerotic plaques is called carotid intimal plaque removal. The surgical procedure generally involves cutting the tubes at the external carotid artery and the common carotid artery, diverting the blood at the external carotid artery and the common carotid artery, and then removing the carotid intimal plaques. The existing diversion tubes are all ordinary medical diversion tubes. The two ends of the diversion tubes are inserted into the uncut external carotid artery segment and the common carotid artery segment, and then they are tightened with sutures several times and removed after the operation. The operation is time-consuming, and if the sutures are tightened too much, it is easy to damage the blood vessels, and if they are too light, it is easy to cause the diversion tube to fall off, making the operation difficult.

[0004] The patent number is CN216984977U, and the patent name is "Blood diversion device for carotid intimal atherectomy". It discloses a device that, through the principle of annular airbag expansion and diameter change, can easily fix the diversion tube inserted into the uncut external carotid artery segment and the common carotid artery segment, reduce the difficulty and time of the operation, and avoid damage to blood vessels. However, the airbag is controlled by an externally connected inflatable ball. The device is large in size and inconvenient to operate.

[0005] To this end, a blood diversion device for carotid intima-artery atherectomy is proposed. Utility Model Content

[0006] The purpose of the utility model is to provide a business-oriented and customizable dynamic data model of a workflow engine to solve the problems raised in the above-mentioned background technology.

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions: a blood diversion device for carotid intimal plaque excision surgery, comprising a connecting tube and a cannula arranged at both ends of the connecting tube, the cannula is fixedly connected to the connecting tube, the outer peripheral surface of the cannula is coaxially provided with an annular positioning groove, the surface of the annular positioning groove is fixedly connected to an airbag, the interior of the cannula is coaxially provided with a pressurizing chamber, and a connecting hole is provided between the pressurizing chamber and the annular positioning groove.

[0008] According to the above technical solution, the connecting hole is arranged inside the side wall of the insert tube, and the two ends of the connecting hole are respectively connected to the pressurizing chamber and the annular positioning groove.

[0009] According to the above technical solution, an annular groove is provided on the outer circumference of the insert tube corresponding to the annular positioning groove and between the pressurizing chamber, the annular groove is coaxially arranged with the insert tube, the connecting hole passes through the annular groove, a rotating ring is rotatably provided on the inner surface of the annular groove, and a hole for connecting the connecting hole is penetrated by the end surface of the rotating ring.

[0010] According to the above technical solution, an arc-shaped through groove is provided through the end surface of the rotating ring, and a limiting column slidably connected to the arc-shaped through groove is fixedly connected to the inner surface of the annular groove.

[0011] According to the above technical solution, a pressurizing tube connected to the pressurizing chamber is provided through the side wall of the insert tube, limiting rings are fixedly connected at both ends of the inner circumference of the pressurizing tube, a valve core is movably provided between the corresponding limiting rings on the inner surface of the pressurizing tube, an annular groove is provided on the inner circumference of the pressurizing tube, an air inlet hole is provided through the side wall of the valve core, and a spring is provided between the valve core and the pressurizing tube.

[0012] Compared with the prior art, the beneficial effects achieved by the utility model are as follows: the utility model provides a connecting tube, and cannulas are respectively provided at both ends of the connecting tube, the cannulas are used to be inserted into the blood vessel, an annular positioning groove is provided on the outer circumferential surface of the cannula, and an air bag is provided at the annular positioning groove, a pressurizing chamber is provided inside the cannula, and compressed gas is filled in the pressurizing chamber, and the compressed gas is transported to the inside of the annular positioning groove through the connecting hole, so that the air bag outside the annular positioning groove expands, and the cannula is fixed to the blood vessel, and the pressurizing chamber is provided inside the cannula, the device is smaller in size, and the operation is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0014] Figure 1 It is a schematic diagram of the main cross-sectional structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the main cross-sectional structure of the cannula of the utility model;

[0016] Figure 3 It is a left-side cross-sectional structural schematic diagram of the utility model;

[0017] Figure 4 It is a schematic diagram of the cannula structure of the utility model;

[0018] Figure 5 It is a schematic diagram of the main cross-sectional structure of the pressurized pipe of the utility model.

[0019] In the figure: 1-connecting tube, 2-insertion tube, 3-annular positioning groove, 4-air bag, 5-pressurization chamber, 6-annular groove, 7-rotating ring, 8-hole, 9-arc-shaped through groove, 10-limiting column, 11-pressurization tube, 12-limiting ring, 13-valve core, 14-annular groove, 15-air inlet, 16-spring, 17-connecting hole. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-5 The utility model provides a technical solution: a blood diversion device for carotid intimal plaque removal, comprising a connecting tube 1 and cannulas 2 arranged at both ends of the connecting tube 1, such as Figure 1 As shown, the cannula 2 is fixedly connected to the connecting tube 1, and the cannula 2 is used to be inserted into the blood vessel. The outer peripheral surface of the cannula 2 is coaxially provided with an annular positioning groove 3, and the surface of the annular positioning groove 3 is fixedly connected with an air bag 4, as shown in FIG. Figure 2 As shown, after gas is injected into the annular positioning groove 3, the airbag 4 collides under the action of air pressure, and the airbag 4 fits against the inner wall of the blood vessel to fix the cannula 2 to the blood vessel. A pressurized chamber 5 is coaxially arranged inside the cannula 2, and a connecting hole 17 is arranged between the pressurized chamber 5 and the annular positioning groove 3. The pressurized gas is pre-filled in the pressurized chamber 5, and the pressurized gas is injected into the annular positioning groove 3 through the connecting hole 17 to expand the airbag 4 to fix the cannula 2 to the blood vessel.

[0022] Specifically, if Figure 2 As shown, the connecting hole 17 is arranged inside the side wall of the insert tube 2, and both ends of the connecting hole 17 are respectively connected to the pressurizing chamber 5 and the annular positioning groove 3.

[0023] Specifically, the outer circumference of the cannula 2 is provided with an annular groove 6 between the corresponding annular positioning groove 3 and the pressurizing chamber 5. Figure 4 As shown, the annular groove 6 is coaxially arranged with the cannula 2, the connecting hole 17 passes through the annular groove 6, and a rotating ring 7 is rotatably arranged on the inner surface of the annular groove 6, as shown in FIG. Figure 3 As shown, the end face of the rotating ring 7 is penetrated by a hole 8 for connecting to the connecting hole 17. Under normal circumstances, the holes 8 and the connecting holes 17 are staggered. At this time, the connecting holes 17 are blocked by the rotating ring 7, and the pressurized gas is located inside the pressurized chamber 5. By rotating the rotating ring 7, the hole 8 is moved between the connecting holes 17 on both sides, so that the connecting holes 17 are connected. The pressurized gas inside the pressurized chamber 5 is injected into the interior of the annular positioning groove 3 through the connecting hole 17, and the airbag 4 is inflated.

[0024] Specifically, if Figure 3 As shown, the end face of the rotating ring 7 is penetrated by an arc-shaped through groove 9, and the inner surface of the annular groove 6 is fixedly connected with a limiting column 10 which is slidably connected to the arc-shaped through groove 9. The rotating ring 7 rotates inside the annular groove 6, and the rotation angle of the rotating ring 7 is limited by the limiting column 10 and the arc-shaped through groove 9. When the limiting column 10 is located at one end of the arc-shaped through groove 9, the hole 8 is exactly located between the two connecting holes 17, which is convenient for equipment operation.

[0025] Specifically, a pressurizing tube 11 connected to the pressurizing chamber 5 is provided through the side wall of the cannula 2. Figure 5 As shown, the two ends of the inner circumference of the pressurized tube 11 are respectively fixedly connected with limit rings 12, and a valve core 13 is movably arranged between the inner surface of the pressurized tube 11 and the limit rings 12. Under the action of the limit ring 12, the valve core 13 will not be separated from the pressurized tube 11, and the inner circumference of the pressurized tube 11 is provided with an annular groove 14, and the side wall of the valve core 13 is penetrated with an air inlet 15, and a spring 16 is arranged between the valve core 13 and the pressurized tube 11. Under the action of the spring 16, the valve core 13 is tightly attached to the limit ring 12 to form a one-way valve, and the gas inside the pressurized chamber 5 will not flow out of the pressurized tube 11. By injecting gas into the pressurized tube 11, the gas pushes the valve core 13 to overcome the movement of the spring 16, and after the gas enters the annular groove 14, it is injected into the pressurized chamber 5 through the air inlet 15 to complete the gas injection.

[0026] When the utility model is used, gas is injected into the pressurized tube 11. Under the action of pressure, the gas pushes the valve core 13 to overcome the movement of the spring 16. After the gas enters the annular groove 14, it is injected into the pressurized chamber 5 through the air inlet 15. After the cannula 2 is inserted into the blood vessel, the rotating ring 7 is rotated, and the hole 8 moves to between the connecting holes 17. The gas in the pressurized chamber 5 enters the annular positioning groove 3 through the connecting holes 17, so that the airbag 4 expands, and the airbag 4 is tightly attached to the inner wall of the blood vessel, thereby completing the fixation between the cannula 2 and the blood vessel.

[0027] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0028] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A blood diversion device for carotid intimal plaque removal surgery, comprising a connecting tube (1) and cannulas (2) arranged at both ends of the connecting tube (1), characterized in that: The cannula (2) is fixedly connected to the connecting tube (1); an annular positioning groove (3) is coaxially arranged on the outer circumference of the cannula (2); an air bag (4) is fixedly connected to the surface of the annular positioning groove (3); a pressurizing chamber (5) is coaxially arranged inside the cannula (2); a connecting hole (17) is arranged between the pressurizing chamber (5) and the annular positioning groove (3).

2. A blood diversion device for carotid intima-arterial plaque removal according to claim 1, characterized in that: The connecting hole (17) is arranged inside the side wall of the insert tube (2), and the two ends of the connecting hole (17) are respectively connected to the pressurizing chamber (5) and the annular positioning groove (3).

3. A blood diversion device for carotid intima-arterial plaque removal according to claim 2, characterized in that: An annular groove (6) is provided on the outer circumferential surface of the insert tube (2) corresponding to the annular positioning groove (3) and the pressure chamber (5), the annular groove (6) is coaxially arranged with the insert tube (2), the connecting hole (17) passes through the annular groove (6), a rotating ring (7) is rotatably provided on the inner surface of the annular groove (6), and a hole (8) for connecting with the connecting hole (17) is penetrated through the end surface of the rotating ring (7).

4. A blood diversion device for carotid intima-arterial plaque removal according to claim 3, characterized in that: An arc-shaped through groove (9) is provided through the end surface of the rotating ring (7), and a limiting column (10) which is slidably connected to the arc-shaped through groove (9) is fixedly connected to the inner surface of the annular groove (6).

5. A blood diversion device for carotid intima-arterial plaque removal according to claim 4, characterized in that: A pressurizing tube (11) connected to the pressurizing chamber (5) is provided through the side wall of the insertion tube (2), and limit rings (12) are fixedly connected to the two ends of the inner circumference of the pressurizing tube (11), and a valve core (13) is movably provided between the inner surface of the pressurizing tube (11) and the limit rings (12), and an annular groove (14) is provided on the inner circumference of the pressurizing tube (11), and an air inlet hole (15) is provided through the side wall of the valve core (13), and a spring (16) is provided between the valve core (13) and the pressurizing tube (11).

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