CN219178786U - Test equipment - Google Patents

Abstract

The utility model provides a test device for testing the anchoring force of a heart valve, which is provided with a test shaft, comprises an annular model and a test device, wherein the annular model is used for fixing the heart valve and enabling the center of the heart valve to be positioned on the test shaft; testing the connecting piece; a test wire connected to the test connector and having a plurality of connection points for connecting to the heart valve, the plurality of connection points being uniformly distributed along a circumference of the test shaft; and the dynamometer is used for applying pulling force to the test connecting piece. Aims to solve the problem of uneven stress in the heart valve testing process.

Description

Test equipment

Technical Field

The utility model relates to the technical field of medical instrument testing equipment, in particular to testing equipment for testing heart valves.

Background

The heart contains four chambers, the Right Atrium (RA), right Ventricle (RV), left Atrium (LA), and Left Ventricle (LV). The valve separating the atrium from the ventricle is called the atrioventricular valve, which acts as a one-way valve, ensuring the normal flow of blood in the heart chamber. When the atrioventricular valve is problematic, it cannot function normally, resulting in improper closure. Insufficiency of the heart valve can have serious consequences for the patient, often resulting in heart failure, reduced blood flow, reduced blood pressure, and/or reduced oxygen flow to human tissue. For example, the atrioventricular valve between the left ventricle and the left atrium is known as the mitral valve, and mitral insufficiency can cause blood to flow from the left atrium back into the pulmonary veins, causing congestion. Severe valve insufficiency, if left untreated, can lead to permanent disability or death.

Transcatheter valve replacement surgery is a procedure that employs catheter intervention to compress a prosthetic valve in vitro into a delivery system, deliver it to the annulus of a human body along a vascular path or puncture tip, and releasably secure the prosthetic valve at the annulus to replace the native valve. Compared with the surgical operation, the catheter valve replacement operation does not need an external circulation auxiliary device, has small wound and quick recovery of patients, and can obviously improve the hemodynamic index of the patients after the operation. On the other hand, transcatheter valve replacement surgery does not have the process of suturing a prosthetic valve to the heart tissue, and good fixation of the valve at the annulus is a recognized problem with valve design.

Anchoring force is one of the important quantitative indicators for evaluating the valve fixation, and generally refers to the maximum external force required for the valve to fall off from the effective implantation site. For another quantitative evaluation index of the valve, radial supporting force, mature testing equipment exists in foreign markets, and new attempts are made in China, such as a testing experiment platform for radial force of a bracket, which is mentioned in patent CN 214893810U. In contrast, the anchoring force test has no marketable device at present, and in the product design stage, the anchoring force is generally tested by directly pulling out the valve, but the fluctuation of the test result is quite large, mainly because the valve is easy to incline when being pulled by uneven pulling force, and once the valve is inclined, a larger error occurs in the measurement result.

Disclosure of Invention

Accordingly, the present utility model is directed to a testing device for a heart valve, which is designed to solve the problem of uneven stress during the testing process of the heart valve.

The utility model provides a test device for testing the anchoring force of a heart valve, having a test shaft, comprising:

an annulus model for securing the heart valve with the heart valve centered on the test axis;

testing the connecting piece;

a test wire connected to the test connector and having a plurality of connection points for connecting to the heart valve, the plurality of connection points being uniformly distributed along a circumference of the test shaft;

and the dynamometer is used for applying pulling force to the test connecting piece.

In an embodiment, the test connector comprises a plurality of test blocks, the plurality of test blocks are sequentially and detachably connected along the test shaft, any one of the test blocks is connected with at least one test line, and the end part of the test line, which is away from the test block, is the connection point.

In one embodiment, the test blocks are provided with first connection bits for connecting adjacent test blocks and second connection bits matched with the first connection bits, the first connection bits and the second connection bits are positioned at two opposite ends of the test blocks, and a plurality of the test blocks are mutually matched and connected end to end through the first connection bits and the second connection bits of the adjacent two test blocks.

In one embodiment, the valve annulus model further comprises a base for fixing the valve annulus model and a top beam for connecting two opposite sides of the base, wherein the base is internally provided with a containing cavity, and the top beam is provided with a limit hole penetrating along the test shaft and used for limiting the test connecting piece.

In an embodiment, one end of the test connecting piece, which is away from the accommodating cavity, is provided with the connecting rod extending along the test shaft, the connecting rod penetrates through the limiting hole from the accommodating cavity to be connected with the dynamometer, and the connecting rod is in clearance fit with the limiting hole.

In an embodiment, the device further comprises a fixing piece for fixing the annular model, a plurality of evenly distributed fixing holes are formed in the periphery of the base, the fixing piece can penetrate through the fixing holes in an adjustable mode to be abutted to the annular model, the fixing piece is fixed in the accommodating cavity together, and the fixing piece is in threaded fit with the fixing holes.

In an embodiment, the relation between the number of test blocks N and the number of wavebars of the heart valve a is:

when an odd factor other than 1 exists in A, N can take the odd factor of A;

and/or, when an even factor exists for a, N may be one-half of the even factor for a, or N is the even factor for a.

In one embodiment, the test connector has a connection portion for connecting the test wire, the connection portion being centered on the test shaft.

In an embodiment, the connecting portion is formed by a connecting hole, two test wires are integrally formed and pass through the connecting hole to be connected with the test connecting piece, and the test connecting piece is further provided with a notch communicated with the connecting hole for placing the test wires.

In one embodiment, the top beam is arc-shaped protruding in a direction away from the receiving cavity.

According to the testing equipment provided by the utility model, the heart valve is fixed in the annular model, the annular model is arranged at the center of the base, so that the heart valve is also positioned at the center of the base, the central shaft of the testing connecting piece is limited at the center of the limiting hole by the limiting hole of the top beam, and the central points of the limiting hole, the testing connecting piece and the heart valve are positioned on the central shaft, so that the stress of each stress point of the heart valve is conveniently concentrated; each test connecting piece corresponds to two test wires, and the connecting point at one end of each test wire or the stress points at two ends of each test wire correspond to the uniformly distributed stress points of the heart valve, so that the stress of the heart valve is concentrated on the central shaft; in order to enable the heart valve to bear force evenly in the circumferential direction, a plurality of test wires and a plurality of test connecting pieces corresponding to the test wires are required to be connected, first connecting positions and second connecting positions which are coaxially arranged at two ends of the test connecting pieces can be matched with each other, the plurality of test connecting pieces can be detachably connected in an end-to-end mode, central shafts of the plurality of test connecting pieces are mutually overlapped after connection, the fact that the stress on a plurality of positions of the heart valve in the circumferential direction can be always concentrated on the central shaft is guaranteed, the stress on the heart valve is even, stress points can be flexibly increased and decreased, and test equipment can adapt to heart valves of various types by selecting the connecting quantity of the test connecting pieces.

The testing device provided by the utility model has the following main beneficial effects:

1. the centers of the heart valve, the accommodating cavity and the limiting hole are positioned on the test shaft, so that the traction force of the heart valve under the test wire 30 is concentrated on the test shaft, and the referenceability of the test result is improved;

2. the plurality of test blocks are sequentially and detachably connected along the test shaft, so that the test equipment can flexibly adjust heart valves with different wave rod numbers;

3. the central axis of the test connecting piece is limited on the test shaft by the limiting hole, so that the direction deviation of the traction force of the test connecting piece on the heart valve is reduced, and the accuracy of the anchoring force test of the heart valve is ensured.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic perspective view of a test apparatus according to a first embodiment of the present utility model.

Fig. 2 is a schematic perspective view of the test block of fig. 1.

Fig. 3 is a schematic view of the test apparatus of fig. 1 without an annulus model.

FIG. 4 is a schematic diagram of the test apparatus of FIG. 1 without test connectors.

Fig. 5 is a schematic diagram of a distribution of stress points for the heart valve of fig. 1 with 3 stress points.

Fig. 6 is a schematic diagram of a distribution of stress points for the heart valve of fig. 1 with 9 stress points.

Fig. 7 is a schematic diagram of a distribution of stress points for the heart valve of fig. 1 with 6 stress points.

Reference numerals illustrate: 10. an annulus model; 10a, heart valve; 10b, a test shaft; 20. testing the connecting piece; 21. a test block; 211. a first connection location; 212. a second connection location; 22. a connection part; 23. a notch; 30. a test line; 40. a base; 41. a fixing hole; 50. a top beam; 51. a limiting hole; 60. and a fixing piece.

Detailed Description

Specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art without making any inventive effort, are intended to be within the scope of the present utility model.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the terms described above will be understood to those of ordinary skill in the art in a specific context.

The terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," and the like are used as references to orientations or positional relationships based on the orientation or positional relationships shown in the drawings, or the orientation or positional relationships in which the inventive product is conventionally disposed in use, merely for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore are not to be construed as limiting the utility model.

The terms "first," "second," "third," and the like, are merely used for distinguishing between similar elements and not necessarily for indicating or implying a relative importance or order.

The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a list of elements does not include only those elements but may include other elements not expressly listed.

Referring to fig. 1 to 4, one embodiment of the present utility model provides a test apparatus for testing the anchoring force of a heart valve 10a, having a test shaft 10b (shown in phantom in fig. 2), comprising:

an annulus model 10 for fixing a heart valve 10a with the center of the heart valve 10a on a test axis 10b, the heart valve 10a having a plurality of stress points uniformly distributed in the circumferential direction;

a test connection 20;

a test wire 30 connected to the test connector 20 and having a plurality of connection points for connecting the heart valve 10a, the plurality of connection points being uniformly distributed along the circumferential direction of the test shaft 10b, the connection points corresponding to the stress points;

a load cell (not shown) for applying a pulling force to the test connection 20.

Specifically, the number of stress points of the heart valve 10a in the circumferential direction depends on the number of the waverods, and the stress points preferably fall at the wave crests of the waverods, the number of the waverods of the existing heart valve 10a is usually a multiple of 3 or a multiple of 4 or a multiple of 5 or a multiple of 7, for example, 6 waves, 8 waves, 9 waves, 10 waves, 12 waves, 16 waves or 18 waves, when the number of the waverods of the heart valve 10a is a multiple of 4, the stress points of the heart valve 10a are arranged in pairs, specifically, each pair of stress points is provided with one stress point on each of opposite sides of the heart valve 10a, at least two pairs of stress points are provided, and the distances between two adjacent stress points in the circumferential direction of the heart valve 10a are equal; the connection points of the test wires 30 correspond to the stress points of the heart valve 10a, and the number of the test blocks 21 is selected according to the number of the test wires 30, so that the corresponding relation among the test blocks 21, the test wires 30 and the heart valve 10a can be flexibly adjusted when different types of heart valves 10a are tested. When the number of the wave bars of the heart valve 10a is a multiple of 3 or a multiple of 5 or a multiple of 7, the stress points are the multiples of 3 or a multiple of 5 or a multiple of 7 of the number of the wave bars of the heart valve 10a, and are equally arranged along the circumferential direction of the heart valve 10a.

In this embodiment, the test connector 20 includes a plurality of test blocks 21, the plurality of test blocks 21 are detachably connected in sequence along the test axis 10b, at least one test wire 30 is connected to any one of the test blocks 21, and a connection point is formed at an end of the test wire 30 facing away from the test block 21.

Specifically, the plurality of test blocks 21 are detachably connected, and the plurality of test blocks 21 each extend along the test axis 10b, so that the connection point of each test line 30 on the plurality of test blocks 21 is located on the test axis 10b. Any one test block 21 can be correspondingly connected with two test lines 30, and the connection points of the two test lines 30 connected with the same test block 21 are connected with two adjacent stress points or two stress points which are oppositely arranged; any test block 21 may be connected to any test wire 30.

In this embodiment, one end of the test block 21 facing away from the connecting rod has a first connection bit 211 connected to adjacent test blocks 21 and a second connection bit 212 matched with the first connection bit 211, and the plurality of test blocks 21 are mutually matched and connected end to end through the first connection bit 211 and the second connection bit 212 of the adjacent two test blocks 21.

Specifically, the first connecting position 211 may be formed by arranging a groove at one end of the test block 21 deviating from the connecting rod, the axial direction of the groove coincides with the test shaft 10b, threads or clamping positions are arranged on the inner wall of the groove, meanwhile, one end of the connecting rod far away from the first connecting position 211 is provided with the second connecting position 212, or the outer sides of the connecting rod are respectively provided with the second connecting position 212, threads or clamping positions matched with the first connecting position 211 are arranged on the second connecting position 212, so that two adjacent test blocks 21 can be fixed in an end-to-end connection manner through the first connecting position 211 and the second connecting position 212, after the plurality of test blocks 21 are connected, the plurality of test shafts 10b coincide with each other, uneven traction distribution of external tensile force to the heart valve 10a is further avoided, the heart valve 10a is easy to incline and side turn over, and accuracy of test results is ensured.

In this embodiment, the test apparatus further comprises a base 40 for securing the annulus model 10 and a cap 50 coupled to opposite sides of the base 40, the base 40 defining a receiving cavity therein, the cap 50 having a limiting aperture 51 extending through along the test axis 10b for defining the test connector 20.

In particular, at least one of the test blocks 21 of the test connection 20, which is furthest from the heart valve 10a, has a test end for exerting a tensile force, which test end is preferably located on a connecting rod, by means of which a load cell or other form of force testing device is connected, the value of the tensile force to which the heart valve 10a is subjected can be obtained, and the magnitude of its anchoring force can be derived. The annular model 10 can simulate the heart environment to fix the heart valve 10a, so that the test form of the heart valve 10a is more similar to the form of the heart valve after being implanted into a human body, and the test result has more reference value. The heart valve 10a is fixed in the middle of the valve annulus model 10, the valve annulus model 10 is fixed in the center of the accommodating cavity formed by the base 40, the top beam 50 spans across the accommodating cavity, two ends of the top beam 50 are connected to two opposite sides of the base 40, a limiting hole 51 is formed in the center of the top beam 50, a connecting rod on one test block 21 farthest from the heart valve 10a of the test connecting piece 20 extends out of the limiting hole 51, and the centers of the heart valve 10a, the valve annulus model 10, the accommodating cavity and the limiting hole 51 are all located on the test shaft 10b, so that the heart valve 10a is guaranteed to be concentrated on the test shaft 10b under the traction force of the test wire 30. Further, the test wire 30 may be one or more of nylon or stainless steel, and the length of the test wire 30 needs to be estimated approximately according to the position of the limiting hole 51 at the center of the top beam 50 right above the base 40 from the heart valve 10a, so that the midpoint of the tensioned test wire 30 is located on the test shaft 10b and is sufficiently spaced from the limiting hole 51.

In this embodiment, the end of the test connector 20 facing away from the accommodating cavity has a connecting rod extending along the test shaft 10b, and the connecting rod passes through the limiting hole 51 from the accommodating cavity to be connected with the dynamometer, and the connecting rod is in clearance fit with the limiting hole 51.

Specifically, a certain gap exists between the limiting hole 51 and the connecting rod, so that the limiting hole 51 can limit the test connecting piece 20 on the central axis of the limiting hole 51, the central axis coincides with the test shaft 10b, the connecting rod can movably enter and exit in the limiting hole 51, and interference on testing of a tensile force value caused by contact friction between the connecting rod and the inner wall of the limiting hole 51 is avoided.

In this embodiment, the fixing member 60 for fixing the annular model 10 is further included, a plurality of evenly distributed fixing holes 41 are formed around the base 40, and the fixing member 60 adjustably penetrates through the fixing holes 41 to abut against the annular model 10, so that the fixing member 60 is jointly fixed in the accommodating cavity, and the fixing member 60 is in threaded fit with the fixing holes 41.

Specifically, the fixing members 60 extend from the base 40 to the annular model 10, so as to realize the relative fixation between the base 40 and the annular model 10, and the annular model 10 is limited in the center of the accommodating cavity by adjusting the lengths of the plurality of evenly distributed fixing members 60 extending to the annular model 10 to be equal. Further, a plurality of fixing holes 41 are uniformly distributed in the circumferential direction of the base 40, and the fixing members 60 extend to the annular model 10 through the fixing holes 41, so that an operator can control the length of the fixing members 60 extending into the accommodating cavity from the outer side of the base 40. Preferably, the fixing piece 60 is in threaded fit with the fixing hole 41, the length of the fixing piece 60 extending into the accommodating cavity can be measured by controlling the number of turns of the fixing piece 60 screwed into the fixing hole 41, the plurality of fixing pieces 60 can be ensured to limit the limiting valve ring model 10 in the center of the base 40 in the accommodating cavity and the center is positioned on the test shaft 10b, the direction deviation of the traction force of the test connecting piece 20 on the heart valve 10a is reduced, and the accuracy of the anchoring force test of the heart valve 10a is ensured.

In the present embodiment, the relationship between the number N of test blocks 21 and the number a of wavebars of the heart valve 10a is:

when an odd factor other than 1 exists in A, N can take the odd factor of A;

and/or, when an even factor exists for a, N may be one-half of the even factor for a, or N is the even factor for a.

Specifically, when there is an odd number of the number a of the stems of the heart valve 10a that is not 1 in the factors of the number a of the stems, the number N of the test blocks 21 may take any odd factor of the number a of the stems of the heart valve 10a other than 1, and the optional minimum odd factor is greater than 1 to ensure that the heart valve 10a is uniformly stressed.

For example, when the number a of the wavebars of the heart valve 10a has a factor of 3, 5, 7, or 9, it means that the wavebars of the heart valve 10a can be divided into 3, 5, 7, or 9 equal parts according to the number, each wavebar equal part has at least one stress point, and in this embodiment, it is preferable that each wavebar equal part is provided with one stress point, and the stress points are connected to two adjacent test wires 30, and the test wires 30 connected to the wavebars of the two adjacent equal parts are connected to the same test block 21, i.e. the number N of the test blocks 21 is 3, 5, 7, or 9.

Referring to fig. 5 and 6, a circle in the drawings represents a wave beam, numerals in the circle represent serial numbers of the wave beam, the circle is a dotted line to indicate that the wave beam is not provided with a stress point, and the circle is a solid line to indicate that the wave beam is provided with a stress point. When the number a of the wavebars of the heart valve 10a is 18, the odd factors 3 and 9 exist in 18, the wavebars of the heart valve 10a can be divided into 3 equal parts or 9 equal parts, stress points can be set on each equal part to connect the test lines 30, the test lines 30 connected on two adjacent stress points are connected with the same test block 21, or any stress point is connected with only one test line 30 and one test block 21, and the number of the test blocks 21 is 3 or 9. Fig. 5 is a schematic diagram of distribution of stress points in which the heart valve 10a of the 18-wave beam is provided with 3 stress points, and fig. 6 is a schematic diagram of distribution of stress points in which the heart valve 10a of the 18-wave beam is provided with 9 stress points.

In addition, when there is an even number in the factors of the number a of the poles of the heart valve 10a and two test lines 30 are simultaneously satisfied to connect one test block 21 correspondingly, the number N of the test blocks 21 may be one half of the even number of the poles of the heart valve 10a, and the optional minimum even number is preferably greater than 2 to ensure that the heart valve 10a is uniformly stressed. When there is an even number in the factors of the number a of the wavebars of the heart valve 10a and one test line 30 is correspondingly connected to one test block 21, the number N of the test blocks 21 may be the even number of the number a of the wavebars of the heart valve 10a, and the optional minimum even number is preferably greater than 2, so as to ensure that the heart valve 10a is uniformly stressed.

For example, when the number a of the wavebars of the heart valve 10a has a factor of 4, 6 or 8, it means that the wavebars of the heart valve 10a can be equally divided into 4 equal parts, 6 equal parts or 8 equal parts according to the number, each equal part is provided with a stress point, each stress point is connected with one test wire 30, and two test wires 30 connected with the stress points on the two oppositely arranged wavebars are connected with the same test block 21, i.e. the number N of the test blocks 21 is 2, 3 or 4; alternatively, each test line 30 is connected to one test block 21 individually, i.e. the number of test blocks 21 has a value N of 4 or 6 or 8.

Referring to fig. 7, when the number a of the wavebars of the heart valve 10a is 18, even factors 6 and 18 exist in 18, the wavebars of the heart valve 10a may be divided into 6 equal parts, one stress point may be set on each equal part to connect with the test line 30, or stress points are set on each wavebar, the test lines 30 connected with two stress points oppositely set are connected with the same test block 21, and the number of the test blocks 21 is 3 or 9. Alternatively, only one test wire 30 and one test block 21 are connected to any one stress point, and the number of the test blocks 21 is 6 or 18. Fig. 7 is a schematic diagram of distribution of stress points of the heart valve 10a with 6 stress points of the 18 wave beam.

In summary, when the number of the wavebars of the heart valve 10a is 18, the wavebars of the heart valve 10a may be divided into 3 equal parts (six wavebars of each equal part), may be divided into 9 equal parts (two wavebars of each equal part), may be divided into 6 equal parts (three wavebars of each equal part), may be divided into 18 equal parts (one wavebar of each equal part), the more the number of the test blocks 21, the more stress points in the circumferential direction of the heart valve 10a, the more uniform the stress distribution, the less the number of the test blocks 21, the shorter the length of the test connection piece 20 sleeved in the direction of the test shaft 10b, and the simpler the structure, and the stress condition of the heart valve 10a may be flexibly set according to the needs in actual operation by those skilled in the art.

In the present embodiment, the test block 21 has a connection portion 22 for connecting the test wire 30, and the center of the connection portion 22 is located on the test shaft 10b.

Specifically, when both ends of the test wire 30 are connected to the heart valve 10a, the test wire 30 is movably connected to the center of the connecting portion 22, and the middle points of the test wires 30 naturally fall at the center of the connecting portion 22 according to the balance between the test wire 30 and the two stress points, the plurality of test wires 30 transmit the stress of the stress points uniformly distributed on the heart valve 10a to the test shaft 10b, and when an external pulling force is applied to the test block 21 along the test shaft 10b, the anchoring force of the heart valve 10a can be tested.

In the present embodiment, the connection portion 22 is formed of a connection hole, and the two test wires 30 are integrally formed and connected to the test block 21 through the connection hole.

Specifically, the round hole-shaped connecting hole has the advantages of simple structure and capability of enabling the test wires 30 to freely move, after the two test wires 30 integrally penetrate through the connecting hole, two connecting points of the two test wires 30 are connected to the heart valve 10a, the two connecting points of the two test wires 30 are held by the heart valve 10a and tend to be balanced, the test wires 30 can move at the connecting hole in the process of forming the balance, the test wires 30 and the heart valve 10a naturally form a stable balanced state, and the midpoint of the test wires 30 naturally falls at the connecting hole.

In this embodiment, the test block 21 further has a notch 23 communicating with the connection hole for placing the test wire 30 therein.

Specifically, due to limitations of the test apparatus, the test wire 30 is usually connected to the heart valve 10a and fixed, and then the valve annulus model 10 is placed in the accommodating cavity of the base 40, at this time, the end portion of the test wire 30 is not convenient to penetrate into the connecting hole, and the limitation of the operation space can be avoided by placing the test wire 30 into the connecting hole from the opening 23.

In this embodiment, the top beam 50 is arcuate in shape protruding away from the receiving cavity.

Specifically, since the test connector 20 can be detachably connected to a plurality of test blocks 21 to generate a height change, in order to ensure that a sufficient space exists in the base 40 to accommodate the length of the test blocks 21, the top beam 50 is configured in an arc shape with its protruding direction away from the accommodating cavity, so that the distance between the limiting hole 51 and the annular valve model 10 is prevented from being too short, and limitation is generated on the number of the test blocks 21.

According to the testing equipment provided by the utility model, the heart valve 10a is fixed in the annular model 10, the annular model 10 is arranged at the center of the base 40, so that the heart valve 10a is also positioned at the center of the base 40, the limiting hole 51 of the top beam 50 limits the testing shaft 10b of the testing block 21 at the center of the limiting hole 51, and the center points of the limiting hole 51, the testing block 21 and the heart valve 10a are all positioned on the testing shaft 10b, so that the stress of each stress point of the heart valve 10a is conveniently concentrated; each test block 21 corresponds to two test wires 30, and the connection points at two ends of each test wire 30 correspond to stress points uniformly distributed on the heart valve 10a, so that the stress of the heart valve 10a is concentrated on the test shaft 10b; in order to make heart valve 10a evenly bear force in the circumference, need connect a plurality of test lines 30 and a plurality of test pieces 21 that correspond with test line 30, the coaxial first hookup location 211 and the second hookup location 212 that set up in test piece 21 both ends can mutually support for can detachably end to end between a plurality of test pieces 21 to the test axle 10b of a plurality of test pieces 21 coincide each other after connecting, guarantee that heart valve 10 a's a plurality of places atress in the circumference can concentrate on test axle 10b all the time, heart valve 10 a's atress is even, can increase and decrease the stress point in a flexible way, test equipment also can adapt to heart valve 10a of various models through the connection quantity of selecting test piece 21.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present utility model should be included in the present utility model. Accordingly, the scope of the utility model should be assessed as that of the appended claims.

Claims (10)

1. Test apparatus for testing the anchoring force of a heart valve (10 a), having a test shaft (10 b), characterized in that it comprises:

-an annulus model (10) for securing the heart valve (10 a) with the heart valve (10 a) centered on the test axis (10 b);

a test connection (20);

a test wire (30) connected to the test connector (20) and having a plurality of connection points for connecting the heart valve (10 a), the plurality of connection points being uniformly distributed along the circumference of the test shaft (10 b);

and a load cell for applying a tensile force to the test connection (20).

2. Test apparatus according to claim 1, wherein said test connection (20) comprises a plurality of test blocks (21), a plurality of said test blocks (21) being detachably connected in sequence along said test axis (10 b), any one of said test blocks (21) being connected to at least one of said test lines (30), the end of said test line (30) facing away from said test block (21) being said connection point.

3. Test device according to claim 2, wherein the test blocks (21) have a first connection bit (211) for connecting adjacent test blocks and a second connection bit (212) cooperating with the first connection bit (211), the first connection bit (211) and the second connection bit (212) being located at opposite ends of the test blocks (21), a plurality of the test blocks (21) being connected end to end by the first connection bit (211) and the second connection bit (212) of adjacent two of the test blocks (21) cooperating with each other.

4. A test apparatus as claimed in claim 3, further comprising a base (40) for securing the annulus mould (10) and a cap (50) connecting opposite sides of the base (40), the base (40) defining a receiving cavity therein, the cap (50) having a limiting aperture (51) extending through the test shaft (10 b) for defining the test connector (20).

5. Test device according to claim 4, characterized in that the end of the test connection piece (20) facing away from the receiving cavity has a connecting rod extending along the test axis (10 b), which connecting rod is connected from the receiving cavity through the limiting aperture (51) with the load cell, which connecting rod is in clearance fit with the limiting aperture (51).

6. The test device according to claim 4, further comprising a fixing member (60) for fixing the annular model (10), wherein a plurality of evenly distributed fixing holes (41) are formed around the base (40), the fixing member (60) is adjustably penetrated into the fixing holes (41) to abut against the annular model (10), and the fixing member (60) is jointly fixed in the accommodating cavity, and the fixing member (60) is in threaded fit with the fixing holes (41).

7. The test device according to claim 2, wherein the relation between the number of test blocks (21) N and the number of wavebars of the heart valve (10 a) a is:

when an odd factor other than 1 exists in A, N can take the odd factor of A;

and/or, when an even factor exists for a, N may be one-half of the even factor for a, or N is the even factor for a.

8. Test device according to claim 1, characterized in that the test connection (20) has a connection (22) for connecting the test line (30), the center of the connection (22) being located on the test shaft (10 b).

9. Test device according to claim 8, wherein the connection portion (22) is formed by a connection hole through which two test wires (30) are integrally formed and connected to the test connection member (20), the test connection member (20) further having a slit (23) communicating with the connection hole for the insertion of the test wires (30).

10. Test device according to claim 4, characterized in that the top beam (50) is arc-shaped protruding in a direction away from the receiving chamber.

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