Valve clamp
By designing a convertible drive arm and clamping arm structure, safe passage and stable clamping of the valve clip are achieved, and the problems of leaflet damage and reflux during valve clip operation in the prior art are solved, which significantly improves the clamping effect.
Patent Information
- Application Number
- CN202420897633.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-28
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-04-28
AI Technical Summary
The existing valve clip cannot be easily pulled back above the valve during operation, resulting in damage to the valve leaflets and not tightly closing the clamp, which further leads to obvious blood reflux.
A valve clip including a driving arm, a clamping arm and a push rod is designed to achieve maximum deployment and clamping of the clamping arm through the conversion of the first configuration and the second configuration, with the clip between the ventricle and the atrium. The type II structure of the clamping arm increases the storage space for the leaflets and avoids leaflet damage.
It improves the passivity and clamping effect of the valve clip, reduces leaflet damage, and significantly alleviates the symptoms of reflux.
Smart Images
Figure CN222323713U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of interventional medical devices, in particular to a valve clip. Background Art
[0002] Atrioventricular valves such as the mitral valve and tricuspid valve are one-way valves in the heart. Normal and healthy atrioventricular valves can control the flow of blood from the atria to the ventricles, while preventing blood from flowing from the ventricles to the atria. The mitral valve includes the anterior leaflet and the posterior leaflet, and the tricuspid valve includes the anterior leaflet, the posterior leaflet, and the septal leaflet. Under normal circumstances, when the left or right ventricle contracts, the edges of any two adjacent leaflets of the mitral or tricuspid valve should be completely aligned to prevent blood from flowing from the ventricles to the atria. If the adjacent leaflets of the mitral or tricuspid valve are not aligned properly, when the left or right ventricle contracts, the mitral or tricuspid valve cannot be completely closed, causing blood to flow back from the ventricles to the atria, thereby causing a series of pathophysiological changes, known as "mitral regurgitation" or "tricuspid regurgitation."
[0003] Transcatheter valve treatment technology refers to delivering the valve repair device to the mitral valve or tricuspid valve through a delivery device, and remotely controlling the function of the valve repair device in the body outside the patient's body to repair or replace the diseased mitral valve or tricuspid valve, thereby treating mitral valve or tricuspid valve regurgitation. During the treatment process, it is necessary to control the clip to pass through the gap between the leaflets, unfold the clamping mechanism, and retreat to complete the clamping. The current valve clips often do not open at an angle enough, causing the leaflets to be hung. When the clips need to be adjusted below the valve, they cannot be easily pulled back above the valve, damaging the leaflets. And because the leaflets have a certain thickness, the two mechanisms of the clips summarized in the prior art that are responsible for clamping the leaflets do not have enough space when clamping the leaflets, resulting in loose clamping and further closure causing leaflet damage, and obvious regurgitation. Utility Model Content
[0004] The purpose of the utility model is to solve the shortcomings in the prior art.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] A valve clip, comprising:
[0007] A driving arm, wherein the driving arm has an extended state and a retracted state;
[0008] A clamping arm, wherein the clamping arm has an expanded state and a clamped state;
[0009] A push rod, wherein the push rod has a manually controllable axial stroke inside the valve clip;
[0010] Also includes a first configuration and a second configuration:
[0011] First configuration: the push rod is located at the farthest end of its axial stroke, the drive arm is in a retracted state, and the clamping arm is in an extended state;
[0012] The second configuration: the push rod is located at the most proximal end of its axial stroke, the drive arm is in a retracted state, and the clamping arm is in a clamped state.
[0013] As a preferred technical solution, there are two driving arms, which are symmetrically arranged on both sides of the pushing rod, and the distal ends of the driving arms are rotationally matched with the distal ends of the pushing rod via a rotating shaft.
[0014] As a preferred technical solution, there are two clamping arms, which are symmetrically arranged on both sides of the push rod, one end of the two clamping arms are rotationally matched through a rotating shaft, and the other ends of the two clamping arms are rotationally matched with the proximal ends of the two driving arms through a rotating shaft.
[0015] As a preferred technical solution, during the movement of the push rod from the farthest end to the nearest end of its axial stroke, the drive arm undergoes a change from a contracted state to an open state to a contracted state, and the clamping arm undergoes a change from an expanded state to a clamped state.
[0016] As a preferred technical solution, when the valve clip is in a first configuration, the driving arm is in a contracted state, and the end of the clamping arm connected to the driving arm is in its distal position; when the valve clip is in a second configuration, the driving arm is in a contracted state, and the end of the clamping arm connected to the driving arm is in its proximal position; when the valve clip is at a point in the middle of the first configuration and the second configuration, the driving arm is in an open state, and the end of the clamping arm connected to the driving arm is in its farthest position from the push rod.
[0017] As a preferred technical solution, the driving arm and the clamping arm are both configured as slot-shaped structures, and the openings of the slot-shaped structures of the driving arm and the clamping arm face toward the pushing rod.
[0018] The length of the driving arm is greater than the length of the clamping arm.
[0019] As a preferred technical solution, the clamping arm is configured as a Type II structure without a groove bottom, the width of the driving arm groove structure is greater than the width of the clamping arm, and the width of the Type II structure of the clamping arm is greater than the diameter of the push rod.
[0020] As a preferred technical solution, the push rod passes through a connection point where two clamping arms rotate to fit together.
[0021] As a preferred technical solution, it also includes a barb clamp, the distal end of which is sleeved on the outside of the push rod, and the distal end of the barb clamp is arranged on the distal side of the rotational matching connection point of the two clamping arms.
[0022] The valve clip provided in the utility model enters the human body using the first configuration. In the first configuration, thanks to the ingenious design of the driving arm and the clamping arm, the clamping arm is allowed to expand to the maximum extent. The clamping arm is almost close to the push rod in the first configuration, which greatly reduces the circumscribed circle area of the clip and improves the passability of the clip. More importantly, when the user converts the clip from the first configuration of the ventricle to the second configuration to complete the clamping of the valve leaflet, if the clamping position is not ideal, it can be converted to the first configuration to withdraw or adjust the position. Since there is no protruding structure on both sides of the clip in the first configuration, the clip is withdrawn from the ventricle to the atrium without any effect on the valve leaflet, and the groove structure of the driving arm ensures the clamping effect on the heart valve, making the clamping of the heart valve by the clip more stable. The II-type structure of the clamping arm further increases the accommodation space for the valve leaflet between the clamping arm and the barbed clamp, effectively accommodating and utilizing the thickness of the valve leaflet, ensuring the clamping effect, while avoiding valve leaflet damage, and having a more outstanding effect on the relief of reflux symptoms. It makes up for the technical problems that are difficult to solve in the existing technology. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] 1-driving arm, 2-clamping arm, 3-push rod, 4-barb clamp;
[0024] Figure 1 is a structural schematic diagram of a first configuration of a valve clip provided in an embodiment;
[0025] Figure 2 is a structural schematic diagram of a second configuration of a valve clip provided in an embodiment;
[0026] Figure 3 is a schematic structural diagram of a driving arm provided in an embodiment;
[0027] Figure 4 is a schematic structural diagram of a driving arm provided in an embodiment;
[0028] Figure 5 is a schematic structural diagram of a clamping arm provided in an embodiment;
[0029] Figure 6 Schematic diagram of the structure of a clamping arm provided in an embodiment. DETAILED DESCRIPTION
[0030] In order to make the purpose, technical solution and advantages of the utility model clearer, the exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.
[0031] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.
[0032] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.
[0033] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both upper and lower orientations. The device can be oriented otherwise (rotated 90 degrees or in other directions) and the spatial relative descriptors used in the text are interpreted accordingly.
[0034] It should also be noted that in the field of interventional medical devices, the proximal end refers to the end closer to the operator, while the distal end refers to the end farther from the operator; the direction of the central axis of rotation of an object such as a cylinder or a tube is defined as the axial direction; the circumferential direction refers to the direction around the axis of an object such as a cylinder or a tube (perpendicular to the axis and perpendicular to the cross-sectional radius); the radial direction refers to the direction along the diameter or radius. It is worth noting that the "end" in the terms "proximal end", "distal end", "one end", "the other end", "first end", "second end", "initial end", "end", "two ends", "free end", "upper end", "lower end", etc. is not limited to the end, endpoint or end face, but also includes a portion extending from the end, endpoint, or end face on the element to which the end, endpoint, or end face belongs for an axial distance and / or radial distance. The above definitions are only for the convenience of expression and cannot be understood as limitations on the present utility model.
[0035] like Figure 1 , Figure 2 A valve clip is shown, comprising:
[0036] A driving arm, wherein the driving arm has an extended state and a retracted state;
[0037] A clamping arm, wherein the clamping arm has an expanded state and a clamped state;
[0038] A push rod, wherein the push rod has a manually controllable axial stroke inside the valve clip;
[0039] Also includes a first configuration and a second configuration:
[0040] First configuration: the push rod is located at the farthest end of its axial stroke, the drive arm is in a retracted state, and the clamping arm is in an extended state;
[0041] The second configuration: the push rod is located at the most proximal end of its axial stroke, the drive arm is in a retracted state, and the clamping arm is in a clamped state.
[0042] The first configuration and the second configuration can be changed repeatedly by moving the push rod forward and backward, which makes the adjustment of the clamp very convenient, provides the user with a huge error tolerance space, and allows the clamping position to be adjusted repeatedly, thereby improving the success rate of the operation.
[0043] As a preferred embodiment, the number of the driving arms is two, and the two driving arms are symmetrically arranged on both sides of the pushing rod, and the distal ends of the driving arms are rotationally matched with the distal ends of the pushing rod via a rotating shaft.
[0044] As a preferred embodiment, the number of the clamping arms is two, and the two clamping arms are symmetrically arranged on both sides of the push rod. One end of the two clamping arms is rotationally matched through a rotating shaft, and the other end of the two clamping arms is rotationally matched with the proximal ends of the two driving arms through a rotating shaft.
[0045] The clamping arm is used for clamping the heart valve, and the driving arm is used for converting the forward and backward movement of the push rod into the opening and closing movement of the clamping arm, thereby completing the clamping of the heart valve.
[0046] As a preferred embodiment, during the movement of the push rod from the farthest end to the nearest end of its axial stroke, the drive arm undergoes a change from a contracted state to an open state to a contracted state, and the clamping arm undergoes a change from an expanded state to a clamped state.
[0047] The first configuration is the basic configuration for entering the human body, and the second configuration is the final configuration for completing the clamping. Both ensure maximum control of the space required for the clip itself, making the passage and maintenance of the clip in the body safer.
[0048] As a preferred embodiment, when the valve clip is in the first configuration, the driving arm is in a contracted state, and the end of the clamping arm connected to the driving arm is in its distal position; when the valve clip is in the second configuration, the driving arm is in a contracted state, and the end of the clamping arm connected to the driving arm is in its proximal position; when the valve clip is at a point in the middle of the first configuration and the second configuration, the driving arm is in an open state, and the end of the clamping arm connected to the driving arm is in its farthest position from the push rod.
[0049] As a preferred implementation, the driving arm and the clamping arm are both configured as slot-shaped structures, and the openings of the slot-shaped structures of the driving arm and the clamping arm face toward the pushing rod.
[0050] The length of the driving arm is greater than the length of the clamping arm.
[0051] By increasing the size of the groove structure of the driving arm, possible interference between the two in the second configuration is avoided, thereby achieving full deployment of the clamping arm, and further ensuring the clamping effect by wrapping the clamping arm with the driving arm.
[0052] As a preferred embodiment, the clamping arm is configured as a II-type structure without a groove bottom, the width of the driving arm groove structure is greater than the width of the clamping arm, and the width of the clamping arm II-type structure is greater than the diameter of the push rod.
[0053] The groove structure ensures the clamping effect on the heart valve, making the clamping of the heart valve more stable. In addition, the II-type structure of the clamping arm further increases the accommodation space for the valve leaflets between the clamping arm and the barbed clamp, effectively accommodating and utilizing the thickness of the valve leaflets, ensuring the clamping effect, while avoiding valve leaflet damage, and having a more outstanding effect on relieving reflux symptoms.
[0054] As a preferred embodiment, the push rod passes through a connection point where two clamping arms are rotatably matched.
[0055] As a preferred embodiment, it also includes a barb clamp, the distal end of which is sleeved on the outside of the push rod, and the distal end of the barb clamp is arranged on the distal side of the rotational matching connection point of the two clamping arms.
[0056] Preferably, the barb clip is configured as an elastic member.
[0057] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.
Claims
1. A valve clip, characterized in that: include: A driving arm, wherein the driving arm has an extended state and a retracted state; A clamping arm, wherein the clamping arm has an expanded state and a clamped state; A push rod, wherein the push rod has a manually controllable axial stroke inside the valve clip; Also includes a first configuration and a second configuration: First configuration: the push rod is located at the farthest end of its axial stroke, the drive arm is in a retracted state, and the clamping arm is in an extended state; The second configuration: the push rod is located at the most proximal end of its axial stroke, the drive arm is in a retracted state, and the clamping arm is in a clamped state.
2. A valve clip according to claim 1, characterized in that: There are two driving arms, which are symmetrically arranged on both sides of the pushing rod. The distal ends of the driving arms are rotationally matched with the distal ends of the pushing rod via a rotating shaft.
3. A valve clip according to claim 2, characterized in that: There are two clamping arms, which are symmetrically arranged on both sides of the push rod. One end of the two clamping arms is rotationally matched through a rotating shaft, and the other end of the two clamping arms is rotationally matched with the proximal ends of the two driving arms through a rotating shaft.
4. A valve clip according to claim 2, characterized in that: During the movement of the push rod from the farthest end to the nearest end of its axial stroke, the drive arm undergoes a change from a contracted state to an open state to a contracted state, and the clamping arm undergoes a change from an expanded state to a clamped state.
5. A valve clip according to claim 4, characterized in that: When the valve clip is in the first configuration, the driving arm is in a contracted state, and the end of the clamping arm connected to the driving arm is in its distal position; when the valve clip is in the second configuration, the driving arm is in a contracted state, and the end of the clamping arm connected to the driving arm is in its proximal position; when the valve clip is at a point in the middle of the first configuration and the second configuration, the driving arm is in an open state, and the end of the clamping arm connected to the driving arm is in its farthest position from the push rod.
6. The valve clip according to claim 2, characterized in that: The driving arm and the clamping arm are both configured as slot-shaped structures, and the openings of the slot-shaped structures of the driving arm and the clamping arm face toward the pushing rod.
7. The valve clip according to claim 6, characterized in that: The length of the driving arm is greater than the length of the clamping arm.
8. The valve clip according to claim 6, characterized in that: The clamping arm is configured as a II-type structure without a groove bottom, the width of the driving arm groove structure is greater than the width of the clamping arm, and the width of the clamping arm II-type structure is greater than the diameter of the push rod.
9. The valve clip according to claim 1, characterized in that: The push rod passes through the connection point where the two clamping arms are rotatably matched.
10. The valve clip according to claim 1, characterized in that: It also includes a barb clip, the distal end of which is sleeved on the outside of the push rod, and the distal end of the barb clip is arranged on the distal side of the rotational matching connection point of the two clamping arms.