Mitral valve measuring device

Abstract

The utility model discloses a mitral valve measuring device which comprises a chordae tendineae length measuring rod, a chordae tendineae length identification frame, a valve leaflet height measuring rod, a valve leaflet height identification handle, an elastic clamping strip and a fixing nail column. A leaflet height measuring rod is hinged to one end, away from the chordae tendineae length measuring rod, of the chordae tendineae length marking frame, the swing angle of the leaflet height measuring rod is 90 degrees, and the chordae tendineae length measuring rod, the first handle, the first scale marks and the chordae tendineae length marking frame are arranged, so that the first handle is held to measure the chordae tendineae length. The chordae tendineae length measuring rod can extend into the left ventricle through the mitral valve opening, the width of the chordae tendineae length identification frame is gradually reduced from one end close to the valve leaflet height measuring rod to the other end, the chordae tendineae length identification frame can better fit the mitral valve leaflet, and it is guaranteed that the valve leaflet is measured in a natural state when extending. Through the chordae tendineae length identification frame, naked eyes can be assisted in observing readings on the first scale marks, and errors are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of mitral valve measurement, and particularly relates to a mitral valve measurement device. Background Art

[0002] The mitral valve, also known as the atrioventricular valve, consists of two leaflets, the anterior and posterior leaflets, located between the left atrium and the left ventricle. Its function is like that of a valve. When blood flows from the left atrium to the left ventricle, the mitral valve will automatically close. It is the boundary marker between the inflow tract and the outflow tract of the left ventricle. Sometimes, small accessory leaflets may appear between the two leaflets. The mitral valve consists of leaflets, chordae tendineae, papillary muscles, and the structures around the valve. Its chordae tendineae are respectively connected to the anterior and posterior papillary muscles. The outlet is the aortic orifice, and a semicircular aortic valve is attached to its periphery. When measuring the mitral valve, two-dimensional ultrasound can display the mitral valve leaflets, protruding into the left atrium across the mitral valve annulus. M-mode ultrasound can display the prolapsed posterior leaflet, showing a hammock-like change or an inverted question mark. However, there is an error between the two-dimensional ultrasound detection method of the mitral valve and the actual size under direct vision of the mitral valve.

[0003] Chinese Patent Publication No. CN217938479U discloses a mitral valve measurement device, which has a simple structure and strong practicability. It can conveniently, quickly, and accurately measure the height of the mitral valve leaflets and the length of the chordae tendineae in the left ventricular filling state, solving the problem of the lack of a proper tool in previous direct vision measurements, and providing help for cardiac surgeons to select the most suitable mitral valve annuloplasty ring and artificial chordae tendineae. However, the above technology has the following disadvantages:

[0004] 1. Since the leaflet height measuring handle is a multi-section telescopic measuring handle, incomplete extension will occur when stretching the leaflet height measuring handle.

[0005] 2. There is a visual error when observing the leaflet height measuring handle with the naked eye, resulting in measurement errors.

[0006] Therefore, this application provides a mitral valve measurement device to solve the above problems. Content of the Utility Model

[0007] The purpose of the utility model is to provide a mitral valve measurement device to solve the problems in the above technology, that is, since the leaflet height measuring handle is a multi-section telescopic measuring handle, incomplete extension will occur when stretching the leaflet height measuring handle, and there is a visual error when observing the leaflet height measuring handle with the naked eye, resulting in measurement errors.

[0008] To achieve the above purpose, the solution of the utility model to solve the above technical problems is as follows:

[0009] A mitral valve measuring device includes a chordae tendineae length measuring rod, a chordae tendineae length marking frame, a leaflet height measuring rod, a leaflet height marking handle, an elastic clamping strip and a fixing nail column. A chordae tendineae length marking frame is slidably sleeved on the outer side of the middle part of the chordae tendineae length measuring rod. One end of the chordae tendineae length marking frame far from the chordae tendineae length measuring rod is hinged with a leaflet height measuring rod. The swinging angle of the leaflet height measuring rod is 90°. A leaflet height marking handle with adjustable position is arranged on the leaflet height measuring rod. An elastic clamping strip is fixed on the chordae tendineae length marking frame through a fixing nail column. The elastic clamping strip is in clamping fit with the leaflet height measuring rod in the vertical state.

[0010] As a further scheme of the utility model, the leaflet height marking handle includes a sliding connection part slidably sleeved on the outer side of the leaflet height measuring rod. An arc-shaped strip is fixedly connected to one side of the sliding connection part.

[0011] As a further scheme of the utility model, the lower part of one side of the chordae tendineae length marking frame facing the arc-shaped strip is designed as an arc-shaped depression.

[0012] As a further scheme of the utility model, a first handle is fixedly connected to the top end of the chordae tendineae length measuring rod. A first scale marking is arranged on the outer wall of the leaflet height measuring rod.

[0013] As a further scheme of the utility model, a base is fixed at the bottom end of the chordae tendineae length measuring rod. An adaptation groove is opened on one side of the base facing the leaflet height measuring rod.

[0014] As a further scheme of the utility model, a second handle is fixedly connected to the end of the leaflet height measuring rod far from the chordae tendineae length marking frame. A second scale marking is arranged on the outer wall of the leaflet height measuring rod.

[0015] As a further scheme of the utility model, the elastic clamping strip is in a "U" - shaped structure. Two arc - shaped grooves are opened on each adjacent side of the elastic clamping strip. Semi - moon pieces are fixedly connected to both ends of the elastic clamping strip. Guide plates are fixedly connected to the ends of the semi - moon pieces far from the elastic clamping strip. And the leaflet height measuring rod is clamped between the two semi - moon pieces.

[0016] As a further scheme of the utility model, the fixing nail column is composed of a column head part and a narrow - diameter part which are fixedly connected to each other. The narrow - diameter part of the fixing nail column is located between the relative arc - shaped grooves.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. For this mitral valve measuring device, through the setting of the chordae tendineae length measuring rod, the first handle, the first scale mark, and the chordae tendineae length marking frame, when holding the first handle, the chordae tendineae length measuring rod can be inserted into the left ventricle through the mitral valve opening. The width of the chordae tendineae length marking frame decreases from one end close to the leaflet height measuring rod to the other end, which can better fit the mitral valve leaflets, ensuring that the leaflets are extended to the natural state for measurement. Through the chordae tendineae length marking frame, it can assist in visually observing the readings on the first scale mark, reducing errors and improving the accuracy of chordae tendineae length measurement;

[0019] 2. For this mitral valve measuring device, through the setting of the elastic strip, the fixing nail post, the semi - lunar pieces, and the guide plate, when lifting the leaflet height measuring rod upward, the leaflet height measuring rod squeezes the two guide plates, causing the two ends of the elastic strip to move away from each other. Until the leaflet height measuring rod is embedded between the two semi - lunar pieces, the elastic strip resets, and the two semi - lunar pieces clamp and fix the leaflet height measuring rod, playing a role in positioning the leaflet height measuring rod, which is beneficial for observing the chordae tendineae length measurement value;

[0020] 3. For this mitral valve measuring device, through the setting of the leaflet height measuring rod, the second handle, the second scale mark, and the leaflet height marking handle, when holding the second handle and swinging the leaflet height measuring rod by 90°, one side of its tail end fits against the inner wall of the chordae tendineae length marking frame. In this way, the leaflet height measuring rod can be kept parallel to the chordae tendineae length marking frame, restricting the maximum swing angle of the leaflet height measuring rod, which is beneficial for measurement. The arc - shaped strip can better fit the mitral valve leaflets, ensuring that the leaflets are extended to the natural state for measurement. Through the arc - shaped strip, it can assist in visually observing the readings on the second scale mark, reducing errors and improving the accuracy of leaflet height measurement. Brief Description of the Drawings

[0021] The following further describes the present utility model in conjunction with the drawings and embodiments:

[0022] Figure 1 It is the front structural diagram of a mitral valve measuring device of the present utility model;

[0023] Figure 2 It is the front cross - sectional view of a mitral valve measuring device of the present utility model;

[0024] Figure 3 It is the internal structural cross - sectional view of the chordae tendineae length marking frame in a mitral valve measuring device of the present utility model;

[0025] Figure 4 It is the top - view structural diagram of a mitral valve measuring device of the present utility model;

[0026] Figure 5 It is the structural diagram of the elastic strip in a mitral valve measuring device of the present utility model;

[0027] Figure 6 This is a structural diagram of the leaflet height identification handle in a mitral valve measuring device of the present utility model.

[0028] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0029] 1. Chordae tendineae length measuring rod; 11. First handle; 12. First scale mark; 13. Base; 14. Adaptation groove; 2. Chordae tendineae length identification frame; 3. Leaflet height measuring rod; 31. Second handle; 32. Second scale mark; 4. Leaflet height identification handle; 41. Sliding connection part; 42. Arc-shaped strip; 5. Elastic clamping strip; 51. Arc-shaped groove; 52. Semilunar piece; 53. Guide plate; 6. Fixed nail post. Specific embodiments

[0030] The present utility model will be further described below in conjunction with embodiments.

[0031] Please refer to Figures 1-6 , the present utility model provides a mitral valve measuring device, including a chordae tendineae length measuring rod 1, a chordae tendineae length identification frame 2, a leaflet height measuring rod 3, a leaflet height identification handle 4, an elastic clamping strip 5 and a fixed nail post 6. The structure is simple and the operation is fast. The bottom end of the chordae tendineae length measuring rod 1 is fixed with a base 13, and an adaptation groove 14 is opened on one side of the base 13 facing the leaflet height measuring rod 3;

[0032] Specifically, during measurement, the adaptation groove 14 can be clamped on the top of the papillary muscle for fixation and placed for sliding to ensure the accuracy of measurement.

[0033] Further, a chordae tendineae length identification frame 2 is slidably sleeved on the outer side of the middle part of the chordae tendineae length measuring rod 1. The top end of the chordae tendineae length measuring rod 1 is fixedly connected with a first handle 11, and a first scale mark 12 is arranged on the outer wall of the leaflet height measuring rod 3;

[0034] Specifically, holding the first handle 11, the chordae tendineae length measuring rod 1 can be inserted into the left ventricle through the mitral valve opening, and the first scale mark 12 is convenient for reading the chordae tendineae length.

[0035] Further, the lower part of one side of the chordae tendineae length identification frame 2 facing the arc-shaped strip 42 is designed as an arc-shaped depression;

[0036] Specifically, the width of the chordae tendineae length identification frame 2 decreases from the end close to the leaflet height measuring rod 3 to the other end, which can better fit the mitral valve leaflet, ensure that the leaflet is measured in a natural state of extension. Through the chordae tendineae length identification frame 2, it can assist the naked eye to observe the reading on the first scale mark 12, reduce errors, and improve the accuracy of chordae tendineae length measurement.

[0037] Further, one end of the chord length identification frame 2 away from the chord length measuring rod 1 is hinged with a leaflet height measuring rod 3, and the swinging angle of the leaflet height measuring rod 3 is 90°;

[0038] Specifically, after the leaflet height measuring rod 3 swings 90°, one side of its tail end fits against the inner wall of the chord length identification frame 2, so that the leaflet height measuring rod 3 can be kept parallel to the chord length identification frame 2, restricting the maximum swinging angle of the leaflet height measuring rod 3 and facilitating the measurement.

[0039] Further, one end of the leaflet height measuring rod 3 away from the chord length identification frame 2 is fixedly connected with a second handle 31, and a second scale identification 32 is arranged on the outer wall of the leaflet height measuring rod 3;

[0040] Specifically, operating the second handle 31 can not only lift and lower the chord length identification frame 2, but also operate the leaflet height measuring rod 3 to swing, and the second scale identification 32 is convenient for reading the leaflet height.

[0041] Further, a leaflet height identification handle 4 with adjustable position is arranged on the leaflet height measuring rod 3. The leaflet height identification handle 4 includes a sliding connection part 41 slidably sleeved on the outer side of the leaflet height measuring rod 3, and an arc-shaped strip 42 is fixedly connected to one side of the sliding connection part 41;

[0042] Specifically, the arc-shaped strip 42 can better fit the mitral valve leaflet, ensuring that the leaflet is measured in a natural state of extension. Through the arc-shaped strip 42, it is possible to assist the naked eye in observing the reading on the second scale identification 32, reducing errors and improving the accuracy of leaflet height measurement.

[0043] Further, an elastic clamping strip 5 is fixed on the chord length identification frame 2 through a fixing nail post 6. The elastic clamping strip 5 is in clamping fit with the leaflet height measuring rod 3 in a vertical state. The elastic clamping strip 5 has a "U" - shaped structure. Two arc-shaped grooves 51 are opened on each adjacent side of the elastic clamping strip 5. Both ends of the elastic clamping strip 5 are fixedly connected with semi - moon pieces 52, and the leaflet height measuring rod 3 is clamped between the two semi - moon pieces 52;

[0044] Specifically, when the leaflet height measuring rod 3 is lifted upwards, the leaflet height measuring rod 3 squeezes the two guide plates 53, causing the two ends of the elastic clamping strip 5 to move away from each other. Until the leaflet height measuring rod 3 is embedded between the two semi - moon pieces 52, the elastic clamping strip 5 resets, and the two semi - moon pieces 52 clamp and fix the leaflet height measuring rod 3, playing a role in positioning the leaflet height measuring rod 3.

[0045] Further, the fixing nail post 6 is composed of a post head part and a narrow-diameter part which are fixedly connected to each other. The part between the opposite arc-shaped grooves 51 is the narrow-diameter part of the fixing nail post 6;

[0046] Specifically, one end of the narrow-diameter part of the fixing nail post 6, which is far away from the post head part, is fixedly welded to the chord length marking frame 2, and the elastic clamping strip 5 can be pressed by the post head part, playing a role in positioning the elastic clamping strip 5.

[0047] Working principle: During use, hold the first handle 11, insert the chord length measuring rod 1 into the left ventricle through the mitral valve opening, fix the lower end fitting groove 14 on the top of the papillary muscle, inject normal saline into the left ventricle through the mitral valve opening until the left ventricle is filled and the mitral valve is in a closed state with the valve leaf fully extended. Then, hold the second handle 31, rotate the valve leaf height measuring rod 3 by 90°, slide and adjust the valve leaf height measuring rod 3 to make it located at the height of the mitral valve leaf coaptation area. The chord length can be obtained by reading the scale on the chord length measuring rod 1. After that, push the valve leaf height marking handle 4 to make its tip located at the mitral valve annulus, and the valve leaf height can be obtained by reading the scale on the valve leaf height measuring rod 3.

Claims

1. A mitral valve measuring device, characterized in that: The invention comprises a chord length measuring rod (1), a chord length marking frame (2), a leaflet height measuring rod (3), a leaflet height marking handle (4), an elastic clamping strip (5) and a fixed nail column (6); the chord length marking frame (2) is provided on the sliding sleeve of the middle outer side of the chord length measuring rod (1); the leaflet height measuring rod (3) is hingedly connected to the end of the chord length marking frame (2) away from the chord length measuring rod (1); the swing angle of the leaflet height measuring rod (3) is 90°; the leaflet height measuring rod (3) is provided with a leaflet height marking handle (4) whose position can be adjusted; the chord length marking frame (2) is fixed with an elastic clamping strip (5) via a fixed nail column (6); the elastic clamping strip (5) is clamped and matched with the leaflet height measuring rod (3) in a vertical state.

2. A mitral valve measuring device according to claim 1, characterized in that: The leaflet height marking handle (4) comprises a sliding connection portion (41) slidably sleeved on the outside of the leaflet height measuring rod (3), and an arc-shaped strip (42) is fixedly connected to one side of the sliding connection portion (41).

3. A mitral valve measuring device according to claim 2, characterized in that: The lower part of the tendon length identification frame (2) facing the arc strip (42) is designed as an arc-shaped depression.

4. A mitral valve measuring device according to claim 1, characterized in that: A first handle (11) is fixedly connected to the top end of the tendon length measuring rod (1), and a first scale mark (12) is arranged on the outer wall of the leaflet height measuring rod (3).

5. The mitral valve measuring device according to claim 1, characterized in that: A base (13) is fixed to the bottom end of the tendon length measuring rod (1), and an adapting groove (14) is provided on a side of the base (13) facing the leaflet height measuring rod (3).

6. The mitral valve measuring device according to claim 1, characterized in that: One end of the leaflet height measuring rod (3) away from the chordae tendineae length marking frame (2) is fixedly connected to a second handle (31), and a second scale mark (32) is provided on the outer wall of the leaflet height measuring rod (3).

7. A mitral valve measuring device according to claim 6, characterized in that: The elastic clip (5) is in a "U"-shaped structure, and two arc-shaped grooves (51) are provided on adjacent sides of the elastic clip (5). Both ends of the elastic clip (5) are fixedly connected to a half-moon piece (52), and one end of the half-moon piece (52) away from the elastic clip (5) is fixedly connected to a guide plate (53), and a leaflet height measuring rod (3) is clamped between the two half-moon pieces (52).

8. A mitral valve measuring device according to claim 7, characterized in that: The fixing nail column (6) is composed of a column head and a narrow diameter portion fixed to each other, and the narrow diameter portion of the fixing nail column (6) is located between the arc-shaped grooves (51).

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