Measuring device for internal arteriovenous fistula external support operation

Abstract

The invention discloses a measuring device for an arteriovenous internal fistula external support operation, which comprises a body and a plurality of measuring parts, the plurality of measuring parts are arranged at intervals along the circumferential direction of the body, and each measuring part is connected with the body; the measuring part is provided with a measuring port, the measuring port penetrates through the measuring part in the thickness direction of the measuring part, and the opening direction of the measuring port is the same as the extending direction of the measuring part; the number of the measuring parts is n, and the first measuring part, the second measuring part... the nth measuring part are sequentially arranged in the circumferential direction of the body. And from the first measuring part, the second measuring part to the nth measuring part, the opening sizes of the measuring ports of the measuring parts are gradually increased. The measuring device can be applied to an internal arteriovenous fistula external support stent operation, can measure the radial size of an internal arteriovenous fistula or a blood vessel, can select a support stent matched with the radial size of the internal arteriovenous fistula, is convenient to measure, can be quickly matched with the internal arteriovenous fistula and the support stent, and is convenient to use. And the operation efficiency can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a measuring device for arteriovenous fistula external support stent surgery. BACKGROUND

[0002] A well-functioning vascular access is the lifeline of hemodialysis patients. Domestic and foreign guidelines and expert consensus unanimously recommend autologous arteriovenous fistula (Arteriovenous Fistula, AVF) as the preferred vascular access for hemodialysis patients. In arteriovenous fistula surgery, a support stent is usually implanted to assist arteriovenous fistula maturation. Due to individual differences, the arteriovenous vessels of different people are different in thickness, and the arteriovenous vessels of different body parts are also different in thickness. The size of the arteriovenous fistula constructed is different, and different sizes of support stents are needed to adapt. At present, there is no measuring tool specially serving arteriovenous fistula external support stent surgery, which has a great influence on the efficiency of the operation. SUMMARY

[0003] The present application provides a measuring device for arteriovenous fistula external support stent surgery to be applied to arteriovenous fistula external support stent surgery and improve the efficiency of the operation.

[0004] The measuring device for arteriovenous fistula external support stent surgery provided by the present application comprises a body and a plurality of measuring portions, the plurality of measuring portions are arranged at intervals along the circumference of the body, and each measuring portion is connected to the body. The measuring portion has a measuring port which penetrates the measuring portion in the thickness direction of the measuring portion, and the opening direction of the measuring port is the same as the extension direction of the measuring portion. The number of measuring portions is n, and the first, second, …, and n-th measuring portions are arranged in sequence along the circumference of the body; the opening size of the measuring port of each measuring portion increases from the first measuring portion, the second measuring portion, …, to the n-th measuring portion.

[0005] In a specific implementation scheme, the measuring portion comprises a support and two measuring pieces, the first end of the support is connected to the body, and the second end of the support is connected to the two measuring pieces, respectively. The two measuring pieces are arranged at intervals, and the interval between the two measuring pieces forms the measuring port.

[0006] In a specific implementation scheme, the two measuring pieces are arranged in parallel.

[0007] In a specific implementation scheme, the two measuring pieces are symmetrically arranged on both sides of the support in the circumferential direction of the body.

[0008] In a specific implementation scheme, the shape of the measuring port is U-shaped.

[0009] In a specific implementation, the measuring portions extend radially along the body.

[0010] In a specific implementation, the included angles of adjacent measuring portions are the same.

[0011] In a specific implementation, the number of measuring portions is n, the body is a regular n-polygon, and each measuring portion is connected to a corner of the body.

[0012] In a specific implementation, the measuring portions are in the same plane as the body.

[0013] In a specific implementation, the body is provided with a positioning hole, which is concentric with the body; the positioning hole has a first positioning opening and a second positioning opening, which respectively extend radially along the body to the inside of the body, and the first positioning opening and the second positioning opening are spaced apart in the circumferential direction of the body; in the radial direction of the body, the first positioning opening corresponds to the position of the first measuring portion, and the second positioning opening corresponds to the position of the nth measuring portion; the opening size of the first positioning opening is smaller than that of the second positioning opening.

[0014] Compared with the prior art, the application has the following advantages: The measuring device for arteriovenous fistula external support stent surgery provided by the application can measure the radial size of the arteriovenous fistula or blood vessel through the measuring port of the measuring part in actual application. Specifically, the radial size of the arteriovenous fistula or blood vessel can be visually estimated and placed in the measuring port of one of the plurality of measuring parts. If the opening size of the measuring port of the measuring part is much larger than the radial size of the arteriovenous fistula or blood vessel, the measuring part with a smaller measuring port opening size is replaced for continuous measurement. Until the opening size of the measuring port of a certain measuring part is basically the same as the radial size of the arteriovenous fistula or blood vessel, the certain measuring part can be called a “matched measuring part”. The opening size of the “matched measuring part” can be determined as the radial size of the arteriovenous fistula or blood vessel. The radial size of the support stent is selected through the measuring port of the measuring part. Specifically, if the external support stent (the stent is sleeved outside the arteriovenous fistula) is needed to be selected, the radial size of the external support stent should be larger than the radial size of the arteriovenous fistula and the arterial and venous blood vessels for constructing the arteriovenous fistula. Therefore, the external support stent with a radial size that is suitable can be selected through the measuring part with a larger opening size than the opening size of the measuring port of the “matched measuring part”. If the internal support stent (the stent is placed inside the arteriovenous fistula) is needed to be selected, the radial size of the internal support stent should be smaller than the radial size of the arteriovenous fistula and the arterial and venous blood vessels for constructing the arteriovenous fistula. Therefore, the internal support stent with a radial size that is suitable can be selected through the measuring part with a smaller opening size than the opening size of the measuring port of the “matched measuring part”. Thus, the radial size of the arteriovenous fistula or blood vessel can be measured, and the support stent with a radial size that is suitable for the arteriovenous fistula can be selected. The measurement is convenient, and the arteriovenous fistula and the support stent can be quickly matched, which is beneficial to improve the operation efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The structure schematic diagram of the measuring device for arteriovenous fistula external support stent surgery provided by the application is shown. Figure 2 The partial structure schematic diagram of the measuring device for arteriovenous fistula external support stent surgery provided by the application is shown.

[0016] Reference signs: 1-body; 11-positioning hole; 12-first positioning port; 13-second positioning port; 121-first straight edge; 122-second straight edge; 123-third straight edge; 2-measuring part; 21-measuring port; 22-supporting part; 23-measuring part. DETAILED DESCRIPTION

[0017] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings. However, the exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein. The same reference numerals in the figures denote the same or similar structures, and therefore repeated descriptions of them will be omitted. The terms expressing position and direction described in the embodiments of this application are illustrative based on the accompanying drawings, but changes can be made as needed, and all such changes are included within the scope of protection of this application. The accompanying drawings of the embodiments of this application are only for illustrating relative positional relationships and do not represent actual scale.

[0018] Specific details are set forth in the following description to aid in understanding this application; however, embodiments of this application can be implemented in various ways other than those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the embodiments of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0019] As one possible application scenario, the measuring device provided in this application for arteriovenous fistula external stent surgery can be applied in the field of hemodialysis, specifically in arteriovenous fistula external stent surgery, enabling the measurement of the radial dimensions of the artery, vein, arteriovenous fistula, and stent. The stent can be an external or internal stent.

[0020] First refer to Figure 1 , Figure 1 A schematic diagram of the measuring device for arteriovenous fistula external support stent surgery provided in this application is shown. Figure 1 As shown, the measuring device for arteriovenous fistula external support stent surgery provided in this application embodiment may include a main body 1 and multiple measuring parts 2. See also Figure 1 In the coordinate system, the x-axis represents the circumferential direction of the body 1, and the y-axis represents the radial direction of the body 1. Multiple measuring units 2 are spaced apart along the circumferential direction of the body 1, and each measuring unit 2 is connected to the body 1.

[0021] The measuring unit 2 has a measuring port 21 that penetrates the measuring unit 2 in the thickness direction, and the opening direction of the measuring port 21 is the same as the extension direction of the measuring unit 2. There are n measuring units 2, arranged sequentially along the circumference of the main body 1, with the 1st, 2nd...nth measuring units. From the 1st measuring unit, 2nd measuring unit... to the nth measuring unit, the opening size of the measuring port 21 of each measuring unit 2 increases progressively. That is, the measuring unit 2 with the smallest opening size of the measuring port 21 is the 1st measuring unit, and the measuring unit 2 with the largest opening size of the measuring port 21 is the nth measuring unit.

[0022] The measuring device for arteriovenous fistula external support stent surgery provided in this application embodiment (hereinafter referred to as "this measuring device") can, in practical application, first measure the radial dimension of the arteriovenous fistula or blood vessel through the measuring port 21 of the measuring unit 2. Specifically, the radial dimension of the arteriovenous fistula or blood vessel can be estimated visually and placed into the measuring port 21 of one of the multiple measuring units 2. If the opening size of the measuring port 21 of the measuring unit 2 is much larger than the radial dimension of the arteriovenous fistula or blood vessel, then the measuring unit 2 with a smaller opening size of the measuring port 21 is replaced and the measurement continues until the opening size of the measuring port 21 of a certain measuring unit 2 is basically the same as the radial dimension of the arteriovenous fistula or blood vessel. This certain measuring unit 2 can be called the "matching measuring unit", and the opening size of the "matching measuring unit" can be identified as the radial dimension of the arteriovenous fistula or blood vessel. Then, the radial dimension of the support stent is screened through the measuring port 21 of the measuring unit 2. Specifically, if an external support stent (a stent fitted outside the arteriovenous fistula) is to be selected, the radial dimension of the external support stent should be greater than the radial dimension of the arteriovenous fistula and the arterial and venous vessels that construct the arteriovenous fistula. In this case, the external support stent with a radial dimension that is compatible can be screened through the measuring unit 2, whose measuring port 21 has an opening size larger than that of the measuring port 21 of the "matching measuring unit". If an internal support stent (a stent placed inside the arteriovenous fistula) is to be selected, the radial dimension of the internal support stent should be smaller than the radial dimension of the arteriovenous fistula and the arterial and venous vessels that construct the arteriovenous fistula. In this case, the internal support stent with a radial dimension that is compatible can be screened through the measuring unit 2, whose measuring port 21 has an opening size smaller than that of the measuring port 21 of the "matching measuring unit". This allows for the measurement of the radial dimensions of arteriovenous fistulas or blood vessels, and the selection of a support stent that matches the radial dimensions of the arteriovenous fistula. This not only makes measurement convenient, but also enables rapid adaptation of the arteriovenous fistula and support stent, which helps improve surgical efficiency.

[0023] exist Figure 1 In the possible implementation shown, there are 6 measuring units 2, arranged sequentially along the circumference of the main body 1, with the 1st, 2nd...6th measuring units, and the opening size of the measuring port 21 of each measuring unit 2 increasing from the 1st measuring unit to the 6th measuring unit. Figure 1 Of the two measuring units 2 marked in the diagram, the measuring unit 2 located below has a smaller measuring port 21 opening size, and is the first measuring unit; the measuring unit 2 located above has a larger measuring port 21 opening size, and is the sixth measuring unit. In practical applications, for example, if the aforementioned "matching measuring unit" is the third measuring unit, then the fourth, fifth, or sixth measuring unit can be used to select the radially sized external support bracket, and the first or second measuring unit can be used to select the radially sized internal support bracket.

[0024] In one possible implementation, the measuring unit 2 may include a support member 22 and two measuring members 23. The first end of the support member 22 is connected to the body 1, and the two measuring members 23 are respectively connected to the second end of the support member 22. The two measuring members 23 are spaced apart, and the gap between the two measuring members 23 forms a measuring port 21. Specifically, the two measuring members 23 may be arranged in parallel, or symmetrically arranged on both sides of the support member 22 in the circumferential direction of the body 1. More specifically, the shape of the measuring port 21 may be U-shaped, which better matches the shape of arteriovenous fistulas or blood vessels, as well as the support stent, enabling more accurate and efficient measurement and screening.

[0025] In a specific implementation, the measuring part 2 can extend radially along the body 1. The included angle between adjacent measuring parts 2 can be the same, or in other words, the interval between adjacent measuring parts 2 can be the same, that is, multiple measuring parts 2 can be arranged at equal intervals, which facilitates molding.

[0026] In specific implementation, the number of measuring parts 2 is n, and the shape of the body 1 can be a regular n-gon, with each measuring part 2 connected to one corner of the body 1. For example, the number of measuring parts 2 is 6, the shape of the body 1 is a regular hexagon, and each measuring part 2 is connected to one corner of the body 1. Alternatively, the number of measuring parts 2 is 6, and the shape of the body 1 can be circular. As mentioned above, the measuring parts 2 extend radially along the body 1, and the included angle between adjacent measuring parts 2 is the same, in which case the included angle between adjacent measuring parts 2 is 60°.

[0027] In practical implementation, the measuring part 2 and the main body 1 can be located on the same plane, and the axial direction of the main body 1 is the thickness direction of the measuring part 2. This facilitates the integral molding of the measuring part 2 and the main body 1, and also facilitates actual measurement operations.

[0028] Figure 2 A partial structural schematic diagram of the measuring device for external support stent surgery of arteriovenous fistulas provided in this application is shown. (Combined with...) Figure 1 and Figure 2As shown, the body 1 may be provided with a positioning hole 11, which may be concentrically arranged with the body 1. The positioning hole 11 has a first positioning opening 12 and a second positioning opening 13, which extend radially into the body 1 and are spaced apart circumferentially on the body 1. In the radial direction of the body 1, the first positioning opening 12 corresponds to the position of the first measuring part, and the second positioning opening 13 corresponds to the position of the nth measuring part, and the opening size of the first positioning opening 12 is smaller than the opening size of the second positioning opening 13. This allows for the quick identification of the measuring part 2 with the smallest opening size (the first measuring part) and the measuring part 2 with the largest opening size (the nth measuring part) through the first positioning opening 12 and the second positioning opening 13, which have different opening sizes. This also facilitates the quick identification of other measuring parts 2, thereby enabling efficient measurement operations. In addition, the measuring device can be indirectly picked up for measurement operations by means of an auxiliary device. The auxiliary device can be inserted into the positioning hole 11 and cooperate with the first positioning port 12 and / or the second positioning port 13 to fix the measuring device.

[0029] In specific implementation, the first positioning port 12 may include a first straight edge 121, a second straight edge 122, and a third straight edge 123. The first straight edge 121 and the second straight edge 122 are respectively connected to the two ends of the third straight edge 123, and the first straight edge 121 and the second straight edge 122 are respectively perpendicular to the third straight edge 123. The third straight edge 123 is perpendicular to the radial direction of the body 1, and the first straight edge 121 and the second straight edge 122 are respectively parallel to the radial direction of the body 1. Thus, the shape of the first positioning port 12 can be a rectangle with one side missing, which facilitates the use of this measuring device in conjunction with auxiliary devices.

[0030] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited to the above embodiments. Obviously, those skilled in the art can make various modifications and variations to this application without departing from the scope and spirit of this application. If these modifications and variations fall within the scope of the claims of this application and their equivalents, then the intent of this application also includes these modifications and variations.

Claims

1. A measuring device for arteriovenous fistula external support stent surgery, characterized in that, It includes a main body and multiple measuring units, the multiple measuring units being arranged at circumferential intervals along the main body, and each measuring unit being connected to the main body; The measuring part has a measuring port that penetrates the measuring part in the thickness direction, and the opening direction of the measuring port is the same as the extension direction of the measuring part. The number of measuring parts is n, and the first, second...nth measuring parts are arranged sequentially along the circumference of the body; from the first measuring part, the second measuring part... to the nth measuring part, the opening size of the measuring port of each measuring part increases.

2. The measuring device for arteriovenous fistula external support stent surgery according to claim 1, characterized in that, The measuring unit includes a support member and two measuring members. The first end of the support member is connected to the main body, and the two measuring members are respectively connected to the second end of the support member. The two measuring members are spaced apart, and the gap between the two measuring members forms the measuring port.

3. The measuring device for arteriovenous fistula external support stent surgery according to claim 2, characterized in that, The two measuring elements are arranged in parallel.

4. The measuring device for arteriovenous fistula external support stent surgery according to claim 3, characterized in that, The two measuring elements are symmetrically arranged on both sides of the support member in the circumferential direction of the body.

5. The measuring device for arteriovenous fistula external support stent surgery according to claim 3 or 4, characterized in that, The measuring port is U-shaped.

6. The measuring device for arteriovenous fistula external support stent surgery according to claim 1, characterized in that, The measuring section extends radially along the body.

7. The measuring device for arteriovenous fistula external support stent surgery according to claim 1, characterized in that, The included angles of adjacent measuring units are the same.

8. The measuring device for arteriovenous fistula external support stent surgery according to claim 1, characterized in that, The number of measuring parts is n, and the shape of the body is a regular n-sided polygon, with each measuring part connected to one corner of the body.

9. The measuring device for arteriovenous fistula external support stent surgery according to claim 1, characterized in that, The measuring part and the main body are located on the same plane.

10. The measuring device for arteriovenous fistula external support stent surgery according to claim 1, characterized in that, The main body is provided with a positioning hole, which is concentrically arranged with the main body; The positioning hole has a first positioning opening and a second positioning opening, the first positioning opening and the second positioning opening extend radially into the body of the body, and the first positioning opening and the second positioning opening are spaced apart in the circumferential direction of the body. In the radial direction of the body, the first positioning port corresponds to the position of the first measuring part, and the second positioning port corresponds to the position of the nth measuring part; The opening size of the first positioning port is smaller than the opening size of the second positioning port.

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