Sheath tube of multi-conveying system

Abstract

The utility model discloses a sheathing canal of a multi-conveying system, which comprises a main body tube provided with an intracavitary section inserted into a blood vessel cavity when in use; the main body tube is provided with three selectable independent cavities, the input port of one cavity is set as a third input end, the input ports of the other two cavities are set as a first input end and a second input end, and the first input end, the second input end and the third input end are all exposed outside the body; the intracavitary section is provided with a left output end and a right output end which respectively correspond to the input end I and the input end II, the input end I and the left output end form a passage, the input end II and the right output end form another passage, and the left output end and the right output end respectively correspond to the positions of a left common carotid artery and a right common carotid artery in an operation; the third input end is used for guiding the supporting guide wire to be inserted into the cavity corresponding to the third input end so as to fix the main body pipe. The purpose of placing the brain protection umbrellas on the two sides at the same time is achieved, the use range of the sheathing canal is expanded, and operation efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of surgical instrument technology, specifically, a sheath used in endovascular treatment procedures. Background Technology

[0002] During endovascular treatment, the procedure may cause atherosclerotic plaques or thrombi to become free in the bloodstream and travel to the distal end of the vessel. Aortic dilatation often involves the supra-aortic branches, requiring reconstruction during endovascular treatment to isolate the dilated vessel lumen. These branches, which involve both common carotid arteries, are common sites of atherosclerotic plaques and thrombi, making them susceptible to tissue debris traveling to the brain during endovascular procedures, potentially leading to iatrogenic ischemic stroke. Before aortic arch reconstruction, neuroprotective devices should be placed in the distal ends of both common carotid arteries to intercept larger plaques or thrombi, protecting cerebral vessels from embolism and reducing the incidence of stroke.

[0003] However, currently used single-delivery system sheaths in clinical practice can only sequentially place cerebral protective umbrellas at the distal end of the patient's carotid artery, which cannot meet the requirements for simultaneous endovascular procedures with multiple guidewires and catheters, thus failing to shorten the time required for cerebral protective umbrella placement. While clinically used single-delivery sheaths have an inner diameter sufficient to accommodate catheters for simultaneous bilateral cerebral protective umbrella placement, the insertion of multiple catheters into a single delivery system can interfere with endovascular procedures, preventing the achievement of the goal of simultaneous bilateral cerebral protective umbrella placement. Utility Model Content

[0004] The purpose of this invention is to provide a sheath with a multi-delivery system to achieve the goal of simultaneously placing a brain protection umbrella on both sides, thereby expanding the scope of application of the sheath and improving surgical efficiency.

[0005] The purpose of this utility model is achieved as follows: a sheath for a multi-delivery system, comprising a main tube having an intraluminal segment for insertion into a blood vessel lumen during use;

[0006] From a cross-sectional perspective, the main tube has three selectable independent cavities, one of which has an input port designated as input port three, and the other two cavities have input ports designated as input port one and input port two, respectively. Input port one, input port two and input port three are all exposed outside the body.

[0007] The intracavitary segment is provided with a left output end and a right output end corresponding to input end one and input end two, respectively. Input end one, the cavity corresponding to input end one, and the left output end form a pathway to accommodate the passage of the brain protection umbrella. Input end two, the cavity corresponding to input end two, and the right output end form another pathway to accommodate the passage of the brain protection umbrella. Furthermore, the left output end and the right output end are oriented towards the left common carotid artery and the right common carotid artery, respectively, during the operation.

[0008] The third input terminal is used to guide the insertion of the support wire into the cavity corresponding to the third input terminal to fix the main tube.

[0009] Furthermore, the end of the cavity segment is marked with a radiopaque point.

[0010] Furthermore, the input terminal is configured as an epitaxial tube structure based on the end extension of the main tube.

[0011] Furthermore, the input terminal is connected to an input tee tube for injecting necessary drugs or contrast agents during the procedure.

[0012] Furthermore, the second input terminal is configured as an extension tube structure based on the extension of the end of the main tube.

[0013] Furthermore, the second input terminal is connected to the second input tee tube for injecting necessary drugs or contrast agents during the procedure.

[0014] Furthermore, the outer diameter of the intraluminal segment matches the lumen of the blood vessel.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. Three independent delivery ends are set inside the sheath. Each independent delivery end can be operated in the blood vessel lumen simultaneously through the operation of guide wire and catheter, so as to achieve the goal of placing the brain protection umbrella on both sides at the same time, expand the scope of use of the sheath, and improve the efficiency of surgery.

[0017] 2. The sheath tube constitutes the following three delivery systems:

[0018] One of the delivery systems is used to insert a support guide wire to fix the position of the sheath;

[0019] The other two delivery systems are used to insert guidewires and catheters, superselecting the left and right common carotid arteries, for bilateral simultaneous insertion of brain protection devices (brain protection umbrellas), solving the problem that a single delivery system can only insert brain protection devices sequentially. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a cross-sectional schematic diagram of the present invention.

[0022] Figure 3 This is a schematic diagram of the surgical steps of this utility model. Detailed Implementation

[0023] The following will refer to the appendix in the embodiments of this utility model. Figure 1-3The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] like Figure 1 As shown, a sheath for a multi-delivery system is proposed, comprising a main tube 2 having an intraluminal section 1 that is inserted into a blood vessel lumen during use. The outer diameter of the intraluminal section 1 matches the blood vessel lumen for smooth insertion. The outer diameter of the intraluminal section 1 is relatively small, while the portion of the main tube 2 outside the blood vessel lumen can be relatively large.

[0025] Based on cross-sectional observation, the main tube 2 has three selectable independent cavities (which can be circular). The input port of one cavity is set as input end 3 5, and the input ports of the other two cavities are set as input end 1 3 and input end 2 4. The part of the main tube 2 outside the blood vessel cavity is set with input end 1 3, input end 2 4 and input end 3 5. Input end 1 3, input end 2 4 and input end 3 5 are all exposed outside the body.

[0026] The aforementioned intracavitary segment 1 is provided with a left output end 9 and a right output end 10 corresponding to input end 3 and input end 4, respectively. Input end 3, the corresponding cavity (corresponding to input end 3), and left output end 9 form a pathway for the passage of a brain protection umbrella. Input end 4, the corresponding cavity (corresponding to input end 4), and right output end 10 form another pathway for the passage of a brain protection umbrella. Both pathways can accommodate guide wires and catheters to be passed through, so as to place the graft (brain protection umbrella) into the target location in the blood vessel. Furthermore, the left output end 9 and right output end 10 are oriented towards the left common carotid artery and the right common carotid artery, respectively, during the operation, so as to introduce the brain protection umbrella (or other grafts) into the left common carotid artery and the right common carotid artery, respectively.

[0027] Both the left output end 9 and the right output end 10 are perforated and can be located on the side wall of the cavity section 1 of the main tube 2.

[0028] The aforementioned input terminal 3.5 is used to guide the insertion of the support guidewire into the cavity corresponding to the input terminal 3.5 to fix the main tube 2. A guidewire insertion end 8 is opened at the corresponding position of the main tube 2 to facilitate the insertion of the support guidewire, lock the position of the support guidewire, and thus fix the position of the sheath. Other methods for locking the support guidewire are not excluded here.

[0029] Therefore, based on the above scheme, it can be seen that the sheath constitutes the following three delivery systems:

[0030] The first delivery system (input end 3 5 and guide wire insertion end 8) is used to insert the support guide wire to fix the position of the sheath tube;

[0031] Delivery systems two and three insert guidewires and catheters with an outer diameter of 3Fr (1mm) to superselect (medical term, understood here as selection) the left and right common carotid arteries for simultaneous bilateral insertion of brain protection devices, solving the problem that a single delivery system can only insert brain protection devices sequentially.

[0032] As a size scheme, such as Figure 2 As shown, the inner diameter of input end 3 and input end 4 is 3Fr (1mm), and both can deliver the grafts required for endovascular treatment through catheters and guidewires with a diameter of 3Fr or less.

[0033] The inner diameter of input terminal 35 is 0.89 mm, used for direct feeding of support guide wires with a diameter of 0.89 mm (0.035 inches).

[0034] To assist in the positioning process of the sheath within the body, the end of the aforementioned intraluminal segment 1 is provided with a radiopaque marker 11 for radiopaque positioning.

[0035] The aforementioned input terminal 3 is configured as an extended tube structure (circular tube) based on the outer end of the main tube 2, and is connected to an input three-way connector 7 for injecting necessary intraoperative drugs or contrast agents; the aforementioned input terminal 4 is configured as an extended tube structure (circular tube) based on the outer end of the main tube 2, and is connected to an input three-way connector 6 for injecting necessary intraoperative drugs or contrast agents. Necessary intraoperative drugs or contrast agents can be injected through the aforementioned input three-way connector 7 and input three-way connector 6.

[0036] The inner diameter of the luminal segment 1 should be no less than 6.5Fr (2.16mm). The preferred outer diameter of this sheath is between 7Fr and 8Fr (2.33mm-2.66mm), and the preferred inner diameter is between 6.5Fr and 7Fr (2.145mm-2.33mm). In specific applications of this catheter sheath, the combination of outer and inner diameters can be 7Fr:6.5Fr, 8Fr:6.5Fr, 8Fr:7Fr, etc. (Fr is a weight, a unit of measurement). In specific examples of this sheath, the effective length of the luminal segment 1 is preferably 50-90mm, and can be 50mm, 60mm, 70mm, 80mm, 90mm, etc.

[0037] It is worth mentioning that, as long as the structure remains unchanged, any variation in the dimensions listed above is within the scope of protection of this patent.

[0038] In this embodiment, while maintaining the use of a single sheath and without enlarging the outer diameter of the sheath, three independent delivery ends are set inside the sheath. Each independent delivery end can be operated simultaneously in the blood vessel lumen through the operation of guidewires and catheters to place a brain protection umbrella (i.e., a brain protection device), thereby expanding the scope of use of the sheath and improving surgical efficiency.

[0039] comprehensive Figure 1 , 3 As shown, during the procedure, in accordance with the clinical standard operating procedure for endovascular interventional therapy, the left radial artery was punctured using guidewire and X-ray imaging technology. The guidewire and sheath were then inserted sequentially. The imaging point marker 11 at the output end of the sheath was tracked by X-ray to determine that the imaging point marker 11 entered the aortic arch and was located between the opening of the left common carotid artery 200 and the opening of the left subclavian artery. This determined the appropriate position for the output end of the sheath to enter the aortic arch 100. The support guidewire delivered by input terminal 35 is inserted into the proximal end for support (fixing the position of the entire sheath). Then, guidewires are introduced into input terminals 1-3 and 2-4 respectively. The guidewires are output from the left output terminal 9 and the right output terminal 10 respectively, and aligned with the left common carotid artery 200 and the right common carotid artery 300 respectively. The required first brain protection device 400 and second brain protection device 500 are delivered into the left common carotid artery 200 and the right common carotid artery 300 respectively using a catheter along the guidewire. After imaging confirms that the catheter has been delivered to the predetermined position at the distal end of the left common carotid artery 200 and the right common carotid artery 300, the catheter is withdrawn, and the first brain protection device 400 and the second brain protection device 500 (brain protection umbrella) are released into the left common carotid artery 200 and the right common carotid artery 300 respectively.

[0040] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In this utility model, it should also be noted that the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to fixed connection, detachable connection, integral molding connection, mechanical connection, or indirect connection through intermediate connecting parts. The specific meaning of the terms in this utility model can be understood according to the specific circumstances.

[0041] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0042] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A sheath for a multi-delivery system, characterized in that, Includes a main tube (2), which has an intraluminal segment (1) that is inserted into the lumen of a blood vessel during use; Based on cross-sectional observation, the main tube (2) has three selectable independent cavities, one of which has an input port designated as input port three (5), and the other two cavities have input ports designated as input port one (3) and input port two (4), and the input ports one (3), two (4) and three (5) are all exposed outside the body; The intracavitary segment (1) is provided with a left output end (9) and a right output end (10) corresponding to the input end one (3) and the input end two (4) respectively. The input end one (3), the cavity corresponding to the input end one (3) and the left output end (9) form a passage for the brain protection umbrella to pass through. The input end two (4), the cavity corresponding to the input end two (4) and the right output end (10) form another passage for the brain protection umbrella to pass through. The left output end (9) and the right output end (10) are respectively facing the left common carotid artery and the right common carotid artery during the operation. The input terminal three (5) is used to guide the support guide wire to the cavity corresponding to the input terminal three (5) to fix the main tube (2).

2. The sheath of a multi-conveying system according to claim 1, characterized in that, The end of the cavity section (1) is marked with a radiopaque point (11).

3. The sheath of a multi-conveying system according to claim 1, characterized in that, The input terminal (3) is configured as an extension tube structure based on the extension of the end of the main tube (2).

4. The sheath of a multi-conveying system according to claim 3, characterized in that, The input terminal (3) is connected to the input three-way tube (7) for injecting necessary drugs or contrast agents during the operation.

5. The sheath of a multi-conveying system according to claim 1, characterized in that, The input terminal 2 (4) is configured as an extension tube structure based on the extension of the end of the main tube (2).

6. The sheath of a multi-delivery system according to claim 5, characterized in that, The second input terminal (4) is connected to the second input tee (6) for injecting necessary drugs or contrast agents during the procedure.

7. A sheath for a multi-delivery system according to any one of claims 1-6, characterized in that, The outer diameter of the intraluminal segment (1) matches the lumen of the blood vessel.

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