Dual-channel dilator

Abstract

The utility model discloses a double-channel expander which comprises a pipe part, a first partition plate and a head part. A guide wire cavity is formed in the tube part, the first partition plate is arranged in the guide wire cavity and divides the guide wire cavity into a first containing cavity and a second containing cavity which are distributed in the radial direction of the guide wire cavity, the head part is arranged at one end of the tube part, and a first penetrating hole communicated with the first containing cavity and a second penetrating hole communicated with the second containing cavity are formed in the head part. According to the double-channel dilator, the hollow pipe part is used for forming the main body part of the double-channel dilator, so that the weight of the double-channel dilator is greatly reduced, the production cost of the double-channel dilator is reduced, the operation difficulty of an operator is reduced, and the working intensity of the operator is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of expander technology, specifically relating to a dual-channel expander. Background Technology

[0002] Dual-channel dilators are designed to correct inaccurate positioning during clinical surgery. When the original puncture site cannot accurately reach the lesion, the original guidewire is used as the central reference hole, and the other hole is used as the correction hole. The guidewire can be inserted into the correction hole to reposition the puncture. However, in order to increase the number of correction holes, the dilator needs to have a larger cross-section, which increases the volume and weight of the dilator, making it difficult for doctors to control the dual-channel dilator in actual use.

[0003] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0004] The purpose of this invention is to provide a dual-channel expander that solves the problem of inconvenient operation caused by the large weight of dual-channel expanders.

[0005] To achieve the above objectives, a specific embodiment of this utility model provides a dual-channel expander, including a tube, a first partition, and a head. The tube has a guide wire cavity inside, and the first partition is disposed within the guide wire cavity, dividing it into a first receiving cavity and a second receiving cavity distributed radially therein. The head is located at one end of the tube, and the head has a first through hole communicating with the first receiving cavity and a second through hole communicating with the second receiving cavity.

[0006] In one or more embodiments of this utility model, a first guide surface is provided on the side of the head near the tube, and the first guide surface is used to guide the guide wire inserted in the first accommodating cavity into the first perforation.

[0007] In one or more embodiments of this utility model, a second guide surface is provided on the side of the head near the tube, and the second guide surface is used to guide the guide wire inserted in the second accommodating cavity into the second perforation.

[0008] In one or more embodiments of this utility model, a first groove is provided on one end of the head near the tube, a first through hole is connected to the bottom of the first groove, the opening area of ​​the first groove is larger than the diameter of the first through hole, and a first guide surface is formed on the groove wall of the first groove.

[0009] In one or more embodiments of this utility model, a second groove is provided on one end of the head near the tube, a second through hole is connected to the bottom of the second groove, the opening area of ​​the second groove is larger than the diameter of the second through hole, and a second guide surface is formed on the groove wall of the second groove.

[0010] In one or more embodiments of this utility model, the first guiding surface is a curved surface.

[0011] In one or more embodiments of this utility model, the second guiding surface is a curved surface.

[0012] In one or more embodiments of the present invention, the dual-channel dilator further includes a second partition disposed within the guidewire cavity, wherein the first partition and the second partition are spaced apart and divide the guidewire cavity into a first accommodating cavity, a second accommodating cavity and a third accommodating cavity distributed radially therein.

[0013] In one or more embodiments of this utility model, the first partition and the pipe are separately arranged.

[0014] In one or more embodiments of this utility model, the second accommodating cavity and the third accommodating cavity are located on both sides of the first accommodating cavity.

[0015] In one or more embodiments of this utility model, on a plane perpendicular to the central axis of the tube, the vertical projection of the first perforation is circular, and the vertical projection of the first perforation is tangent to the vertical projection of the first partition and the vertical projection of the second partition.

[0016] In one or more embodiments of this utility model, on a plane perpendicular to the central axis of the tube, the vertical projection of the second perforation is circular, and the vertical projection of the first partition is tangent to the vertical projection of the second perforation.

[0017] In one or more embodiments of this utility model, the second partition and the pipe are separately arranged.

[0018] In one or more embodiments of this utility model, the dual-channel expander further includes a tail portion located at the end of the tube away from the head, and the tail portion is provided with a third through hole communicating with the first accommodating cavity and a fourth through hole communicating with the second accommodating cavity.

[0019] In one or more embodiments of this utility model, the dual-channel dilator further includes a second partition plate disposed in the guide wire cavity, with the two ends of the first partition plate respectively inserted into the head and the tail, and the two ends of the second partition plate respectively inserted into the head and the tail.

[0020] In one or more embodiments of this invention, the first perforation extends along a direction parallel to the central axis of the head.

[0021] In one or more embodiments of this invention, the second perforation extends along a direction parallel to the central axis of the head.

[0022] In one or more embodiments of this utility model, the third perforation extends along a direction parallel to the central axis of the tail.

[0023] In one or more embodiments of this utility model, the fourth perforation extends along a direction parallel to the central axis of the tail.

[0024] In one or more embodiments of this utility model, the central axis of the first perforation coincides with the central axis of the tube.

[0025] In one or more embodiments of this utility model, the central axis of the first perforation coincides with the central axis of the tail.

[0026] In one or more embodiments of this utility model, the central axis of the first perforation coincides with the central axis of the head.

[0027] Compared with the prior art, this utility model uses hollow tubes to form the main body of the dual-channel expander, which greatly reduces the weight of the dual-channel expander, lowers the production cost of the dual-channel expander, reduces the difficulty of operation for operators, and reduces the workload of operators. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a three-dimensional structural diagram of the dual-channel expander in one embodiment of the present invention;

[0030] Figure 2 This is an exploded structural diagram of a dual-channel expander in one embodiment of the present invention;

[0031] Figure 3 This is a side view of the dual-channel expander in one embodiment of the present invention;

[0032] Figure 4 This is an exploded view of the dual-channel expander in one embodiment of the present invention.

[0033] Figure 5 This is an exploded view of the dual-channel expander in one embodiment of the present invention from another perspective;

[0034] Figure 6 for Figure 3 Cross-sectional structure diagram at section line AA in the middle;

[0035] Figure 7 for Figure 3 Cross-sectional structure diagram at the BB section line.

[0036] Explanation of main reference numerals in the attached drawings: 1. Tube section, 11. First accommodating cavity, 12. Second accommodating cavity, 13. Third accommodating cavity, 2. First partition, 21. First insertion part, 3. Second partition, 31. Second insertion part, 4. Head, 41. First perforation, 42. Second perforation, 43. First groove, 431. First guide surface, 44. Second groove, 441. Second guide surface, 5. Tail section, 51. Third perforation, 52. Fourth perforation. Detailed Implementation

[0037] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. 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 should fall within the protection scope of this utility model.

[0038] It should be noted that the terms "first" and "second" in the following embodiments are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0039] In one embodiment, reference is made to Figures 1 to 7 As shown, this utility model provides a dual-channel expander, which includes a tube 1, a first partition 2, a second partition 3, a head 4, and a tail 5.

[0040] Specifically, tube 1 is the main body of the dual-channel expander. Tube 1 is constructed as a hollow tube, forming a guide wire cavity inside. First partition 2 and second partition 3 are disposed in the guide wire cavity and are both separate from tube 1. First partition 2 and second partition 3 both extend in a direction parallel to the central axis of tube 1, dividing the guide wire cavity into a first receiving cavity 11, a second receiving cavity 12 and a third receiving cavity 13 distributed radially, wherein the second receiving cavity 12 and the third receiving cavity 13 are located on both sides of the first receiving cavity 11. The head 4 and tail 5 are respectively disposed at both ends of the tube 1 to seal the guide wire cavity inside the tube 1. The head 4 is pointed and has a first through hole 41 and a second through hole 42. The tail 5 has a third through hole 51 and a fourth through hole 52. The first through hole 41, the first accommodating cavity 11 and the third through hole 51 are connected to form a working channel for the guide wire to pass through. The second through hole 42, the second accommodating cavity 12 and the fourth through hole 52 are connected to form another working channel for another guide wire to pass through. The third accommodating cavity 13 is relatively closed and no guide wire is passed through it. It is mainly used to reduce the space of the first accommodating cavity 11 and avoid the first accommodating cavity 11 being too large, which would increase the difficulty of passing through the guide wire.

[0041] According to the above structural design, the hollow tube 1 constitutes the main body of the dual-channel expander, which can greatly reduce the weight of the dual-channel expander, reduce the production cost of the dual-channel expander, reduce the difficulty of operation for the operator, and reduce the workload of the operator.

[0042] It is understood that in the above embodiments, the first receiving cavity 11 and the second receiving cavity 12 are used for threading the guide wire in the dual-channel expander, and the third receiving cavity 13 is not used for threading the guide wire. However, this is not a limitation on the inventive concept of this application. For example, in some alternative embodiments, the first receiving cavity 11 and the third receiving cavity 13 may be used for threading the guide wire, or the second receiving cavity 12 and the third receiving cavity 13 may be used for threading the guide wire. For another example, only the first partition 2 may be provided in the guide wire cavity to separate the first receiving cavity 11 and the second receiving cavity 12, etc.

[0043] In one embodiment, reference is made to Figure 4 , Figure 5 and Figure 7 As shown, the two ends of the first partition 2 are respectively inserted into the head 4 and the tail 5, and the two ends of the second partition 3 are also respectively inserted into the head 4 and the tail 5, so as to better fix the position of the first partition 2 and the second partition 3, and facilitate positioning when installing the first partition 2 and the second partition 3.

[0044] Furthermore, the width of both ends of the first partition 2 is reduced, forming two first insertion portions 21 at both ends, which are respectively inserted into the head 4 and the tail 5. Similarly, the width of both ends of the second partition 3 is also reduced, forming two second insertion portions 31 at both ends, which are respectively inserted into the head 4 and the tail 5.

[0045] In one embodiment, reference is made to Figures 4 to 6 As shown, the end of the head 4 near the tube 1 is constructed as a cylindrical structure, and the end away from the tube 1 is constructed as a conical structure, with a chamfered tip. The first perforation 41 extends parallel to the central axis of the head 4, and its central axis coincides with both the central axis of the head 4 and the central axis of the tube 1. The second perforation 42 also extends parallel to the central axis of the head 4, but is offset from the central axis of the head 4.

[0046] In one embodiment, reference is made to Figures 4 to 6 As shown, a first groove 43 is recessed at one end of the head 4 near the tube 1. A first guide surface 431 is formed on the groove wall of the first groove 43. The groove opening of the first groove 43 extends to the end face of the head 4, and the bottom of the first groove 43 connects to the first through hole 41. On a plane perpendicular to the central axis of the head 4, the opening area of ​​the first groove 43 is larger than the diameter of the first through hole 41, and the vertical projection of the first groove 43 can completely cover the vertical projection of the first through hole 41.

[0047] Similarly, a second groove 44 is recessed at one end of the head 4 near the tube 1. A second guide surface 441 is formed on the groove wall of the second groove 44. The groove opening of the second groove 44 extends to the end face of the head 4, and the bottom of the second groove 44 communicates with the second through hole 42. On a plane perpendicular to the central axis of the head 4, the opening area of ​​the second groove 44 is larger than the diameter of the second through hole 42, and the vertical projection of the second groove 44 can completely cover the vertical projection of the second through hole 42.

[0048] Furthermore, the first guide surface 431 and the second guide surface 441 are constructed as curved surfaces.

[0049] Preferably, the aforementioned surface is a sphere or an ellipsoid, or something similar to a sphere or an ellipsoid.

[0050] In other embodiments, the first guide surface 431 and the second guide surface 441 may also be configured as planes.

[0051] In one embodiment, reference is made to Figure 6 and Figure 7As shown, both the first perforation 41 and the second perforation 42 are constructed as circular holes. On a plane perpendicular to the central axis of the tube 1, the vertical projections of the first perforation 41 and the second perforation 42 are circular. The vertical projection of the first perforation 41 is tangent or almost tangent to the vertical projections of the first partition 2 and the second partition 3. The vertical projection of the first partition 2 is tangent or almost tangent to the vertical projection of the second perforation 42. This is to make the first partition 2 as close as possible to the periphery of the first perforation 41 and the second perforation 42, thereby reducing the space of the first receiving cavity 11 and the second receiving cavity 12 and reducing the difficulty of threading the guide wire into the first receiving cavity 11 and the second receiving cavity 12.

[0052] In one embodiment, the tube 1, head 4 and tail 5 can be fixedly connected together by welding. The outer diameter of the tube 1 is set to about 7 mm, the tube wall thickness is set to about 0.5 mm, the thickness of the first partition 2 and the second partition 3 is set to about 0.5 mm, the diameter of the first through hole 41, the second through hole 42, the third through hole 51 and the fourth through hole 52 is set to about 1.6 mm, and the total length of the dual-channel expander is set to about 250 mm.

[0053] 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, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0054] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification 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 dual-channel expander, characterized in that, include: Tube section (1), which has a guide wire cavity inside; A first partition (2) is disposed in the guide wire cavity, which divides the guide wire cavity into a first accommodating cavity (11) and a second accommodating cavity (12) distributed radially therein; The head (4) is located at one end of the tube (1). The head (4) has a first through hole (41) communicating with the first accommodating cavity (11) and a second through hole (42) communicating with the second accommodating cavity (12).

2. The dual-channel expander according to claim 1, characterized in that, The head (4) has a first guide surface (431) on the side near the tube (1), the first guide surface (431) being used to guide the guide wire inserted in the first receiving cavity (11) into the first perforation (41); and / or, The head (4) has a second guide surface (441) on the side near the tube (1). The second guide surface (441) is used to guide the guide wire inserted in the second receiving cavity (12) into the second perforation (42).

3. The dual-channel expander according to claim 2, characterized in that, The head (4) has a first groove (43) on one end near the tube (1), the first through hole (41) is connected to the bottom of the first groove (43), the opening area of ​​the first groove (43) is larger than the diameter of the first through hole (41), and the first guide surface (431) is formed on the groove wall of the first groove (43); and / or, The head (4) is provided with a second groove (44) on one end near the tube (1), the second through hole (42) is connected to the bottom of the second groove (44), the opening area of ​​the second groove (44) is larger than the aperture of the second through hole (42), and the second guide surface (441) is formed on the groove wall of the second groove (44).

4. The dual-channel expander according to claim 2, characterized in that, The first guide surface (431) is a curved surface; and / or, The second guide surface (441) is a curved surface.

5. The dual-channel expander according to claim 1, characterized in that, The dual-channel dilator further includes a second partition (3) disposed within the guidewire cavity, wherein the first partition (2) and the second partition (3) are spaced apart, dividing the guidewire cavity into a first receiving cavity (11), a second receiving cavity (12), and a third receiving cavity (13) distributed radially therein; and / or, The first partition (2) and the tube (1) are separately arranged.

6. The dual-channel expander according to claim 5, characterized in that, The second accommodating cavity (12) and the third accommodating cavity (13) are located on both sides of the first accommodating cavity (11); and / or, On a plane perpendicular to the central axis of the tube (1), the vertical projection of the first perforation (41) is circular, and the vertical projection of the first perforation (41) is tangent to the vertical projections of the first partition (2) and the second partition (3); and / or, On a plane perpendicular to the central axis of the tube (1), the vertical projection of the second perforation (42) is circular, and the vertical projection of the first partition (2) is tangent to the vertical projection of the second perforation (42); and / or, The second partition (3) and the tube (1) are separate components.

7. The dual-channel expander according to claim 1, characterized in that, The dual-channel expander also includes a tail (5) located at the end of the tube (1) away from the head (4), and the tail (5) is provided with a third through hole (51) communicating with the first accommodating cavity (11) and a fourth through hole (52) communicating with the second accommodating cavity (12).

8. The dual-channel expander according to claim 7, characterized in that, The dual-channel expander also includes a second partition (3) disposed in the guide wire cavity. The two ends of the first partition (2) are respectively inserted into the head (4) and the tail (5). The two ends of the second partition (3) are respectively inserted into the head (4) and the tail (5).

9. The dual-channel expander according to claim 7, characterized in that, The first perforation (41) extends along a direction parallel to the central axis of the head (4); and / or, The second perforation (42) extends along a direction parallel to the central axis of the head (4); and / or, The third perforation (51) extends along a direction parallel to the central axis of the tail (5); and / or, The fourth perforation (52) extends along a direction parallel to the central axis of the tail (5).

10. The dual-channel expander according to claim 7, characterized in that, The central axis of the first perforation (41) coincides with the central axis of the tube (1); and / or, The central axis of the first perforation (41) coincides with the central axis of the tail (5); and / or, The central axis of the first perforation (41) coincides with the central axis of the head (4).

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