Three-legged aortic valve forceps

Abstract

The three-legged aortic valve forceps comprise three supporting arms and an outer ring, the supporting arms are elastic and can be folded inwards, measuring rings are connected to the outer sides of the supporting arms in a sleeving mode, grabbing parts are arranged at the lower ends of the supporting arms, the upper ends of the supporting arms are fixedly connected, the lower sides of the supporting arms are separated and unfolded outwards, and the outer ring is arranged on the outer ring. The valve leaflet clamping device has the advantages that the valve leaflet can be rapidly and safely clamped and fixed, and the inner diameter of a prosthesis for replacing the aorta wall can be measured in an auxiliary mode.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a three-legged aortic valve clamp. Background Technology

[0002] For patients with aortic insufficiency and aneurysm (i.e., dilation of the aortic wall), it is generally not attempted to replace the aortic valve with an artificial valve. Instead, efforts are made to structurally preserve the patient's own aortic valve because its hemodynamics are superior to any artificial valve. The aortic valve is a so-called leaflet valve, consisting of three leaflets.

[0003] During aortic valve reconstruction, the affected portion of the aortic wall is removed, but the valve and annulus are preserved, and the entire valve assembly is implanted into a tubular prosthesis. The challenge lies in determining the size (i.e., diameter) of the prosthesis, as it cannot be too large or too small. To date, due to the lack of tools to measure the correct diameter, the size of the prosthesis has been estimated by the surgeon based on experience. Three-armed forceps are known, whose three arms can move side by side in the same plane. However, while such forceps are suitable for some surgeries, they are not suitable for aortic valve reconstruction because they cannot grasp the valve leaflets. Utility Model Content

[0004] This invention addresses the problem of determining the size (i.e., diameter) of the prosthesis during aortic valve reconstruction, as existing three-arm forceps are unsuitable for aortic valve reconstruction because they cannot grasp the valve leaflets. It provides a three-legged aortic valve clamp.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: a three-legged aortic valve clamp, comprising three arms and an outer ring, the arms being elastic and retractable inward, the measuring ring being fitted around the outside of the arms, the lower end of the arms being provided with a gripping part, the upper end of the arms being fixedly connected, and the lower sides of the arms being separated and unfolded outward.

[0006] As an improvement, the gripping part is a 120° arc segment from the longitudinal view of the support arm. The gripping part has two clamping surfaces. When the three support arms are closed, each clamping surface cooperates with the clamping surface of the gripping part of the adjacent support arm.

[0007] As an improvement, the outer ring is polygonal, the outer side of the support arm rests against the inside of the measuring ring, and the outer ring can move outside the support arm to retract the support arm.

[0008] As an improvement, the outer side of the support arm has a linear array of several grooves, and the upper side of the support arm is provided with a raised top block.

[0009] The advantages of this utility model are as follows: This utility model provides an aortic valve clamp that can be used with a surgical instrument kit (measuring ring) for aortic valve reconstruction. These instruments can quickly and safely clamp and fix the valve leaflets and can assist in measuring the inner diameter of the prosthesis that replaces the aortic wall. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model.

[0011] Figure 2 This is a schematic diagram of the gripping part of this utility model.

[0012] Figure 3 This is a schematic diagram of the single support arm structure of this utility model.

[0013] Figure 4 This is a schematic diagram of the structure of this utility model in use.

[0014] As shown in the figure: 1. Support arm; 2. Outer ring; 3. Grip part; 4. Clamping surface; 5. Protruding top block; 6. Groove. Detailed Implementation

[0015] The present invention will now be described in further detail with reference to the accompanying drawings.

[0016] Combined with appendix Figure 1-4 A three-legged aortic valve clamp includes three arms 1 and an outer ring 2. The arms 1 are elastic and can be retracted inward. The outer ring 2 is sleeved on the outside of the arms 1. The lower end of the arms 1 is provided with a gripping part 3. The upper end of the arms 1 is fixedly connected. The lower sides of the arms 1 are separated and unfold outward.

[0017] From the longitudinal perspective of the support arm 1, the gripping part 3 forms a 120° arc segment. The gripping part 3 has two clamping surfaces 4. When the three support arms 1 are closed, each clamping surface 4 cooperates with the clamping surface 4 of the gripping part 3 of the adjacent support arm 1.

[0018] Aortic valve clips typically have a length of about 16 to 22 centimeters. When the three arms 1 are in the closed state, the gripping part 3 defines a hemisphere with a diameter of about 15 millimeters, and the gripping part 3 itself has a height of about 10 millimeters.

[0019] The outer ring 2 is polygonal in shape and serves as a locking device for the three support arms 1. Its limit displacement range is between the protruding top block 5 and the gripping part 3. The outer side of the support arm 1 rests against the inside of the measuring ring, and the outer ring 2 can move outside the support arm 1 to retract the support arm 1.

[0020] The outer side of the support arm 1 has a linear array of several grooves 6, and the upper side of the support arm 1 is provided with a protruding top block 5.

[0021] In a specific implementation case, one valve leaflet can first be grasped and clamped, and the two arms 1 of grasping the leaflet can be fixed relative to each other. Then, the other two leaflets can be grasped and clamped. After all three leaflets have been grasped, the three arms can be fixed by moving the outer ring 2. Then, the operator can measure the inner diameter of the required prosthesis by measuring the grasping part 3 of the aortic valve clamp with the measuring ring.

[0022] In this embodiment, the corresponding instrument kit includes a series of measuring rings with 10 different outer diameters. In use, the measuring rings are fitted onto the fixed leaflets, and the operator can check the inner diameter of the prosthesis to ensure optimal implantation of the valve device. The measuring rings do not need to have a continuous circumference, but may have slits to allow them to be fitted onto the valve from the side.

[0023] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A three-legged aortic valve clamp, characterized in that: It includes three support arms (1) and an outer ring (2). The outer ring (2) is sleeved on the outside of the support arm (1). The lower end of the support arm (1) is provided with a gripping part (3). The upper end of the support arm (1) is fixedly connected. The lower sides of the support arm (1) are separated and unfold outward. The outer ring (2) is polygonal, the outer side of the support arm (1) rests against the inside of the measuring ring, and the outer ring (2) can move outside the support arm (1) to retract the support arm (1); The outer side of the support arm (1) has a number of grooves (6) arranged in a straight line, and the upper side of the support arm (1) is provided with a protruding top block (5).

2. The three-legged aortic valve clamp according to claim 1, characterized in that: The gripping part (3) forms a 120° arc segment from the longitudinal perspective of the support arm (1). The gripping part (3) has two clamping surfaces (4). When the three support arms (1) are closed, each clamping surface (4) cooperates with the clamping surface (4) of the gripping part (3) of the adjacent support arm (1).

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