Compensated closure instrument

Abstract

The application discloses a compensation type closing device, which comprises an upper clamping arm, a lower clamping arm, a first elastic clamping piece and a second elastic clamping piece. Two ends of the first elastic clamping piece are connected to the distal ends of the upper clamping arm and the lower clamping arm respectively. Two ends of the second elastic clamping piece are connected to the proximal ends of the upper clamping arm and the lower clamping arm respectively. The first elastic clamping piece is clamped between two compensation columns. The two compensation columns are arranged between the distal ends and the proximal ends of the upper clamping arm and the lower clamping arm respectively. The first elastic clamping piece and the second elastic clamping piece are arranged along the extension direction of the upper clamping arm and the lower clamping arm. The compensation type closing device has the advantages of small volume and easy capturing of target tissues.

Description

Technical Field

[0001] This invention relates to a medical device, and more particularly to a compensatory closure device. Background Technology

[0002] Closure devices are a type of medical device used clinically to clamp tissues to prevent or treat certain diseases. For example, the left atrial appendage of a patient with atrial fibrillation needs to be clamped to prevent stroke. In patients with valvular regurgitation, the base of the valve leaflets can be clamped to reduce regurgitation. Existing closure devices consist of an upper clamping arm, a lower clamping arm, and a spring that applies clamping force to the two clamping arms. The spring is perpendicular to the plane formed by the upper and lower clamping arms, resulting in a large size and difficulty in capturing the target tissue. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a compensatory closure device that is small in size and easy to capture target tissue.

[0004] The present invention provides a compensating closure device comprising an upper clamping arm, a lower clamping arm, a first elastic clamping member, and a second elastic clamping member. The two ends of the first elastic clamping member are respectively connected to the distal ends of the upper clamping arm and the lower clamping arm, and the two ends of the second elastic clamping member are respectively connected to the proximal ends of the upper clamping arm and the lower clamping arm. The first elastic clamping member is clamped between two compensating posts, which are respectively located between the distal and proximal ends of the upper and lower clamping arms. The first and second elastic clamping members are arranged along the extending direction of the upper and lower clamping arms.

[0005] The present invention provides a compensating closure device, wherein the first elastic clamping member includes a first U-shaped arm, and the two ends of the first U-shaped arm are respectively connected to a first straight arm; the second elastic clamping member includes a second U-shaped arm, and the two ends of the second U-shaped arm are respectively connected to a second straight arm; the ends of the two first straight arms are respectively connected to the distal ends of the upper clamping arm and the lower clamping arm; the ends of the two second straight arms are respectively connected to the proximal ends of the upper clamping arm and the lower clamping arm; and the two first straight arms are clamped between the two compensating columns.

[0006] The present invention provides a compensating closure device, wherein the upper clamping arm and the lower clamping arm each include a closure panel, and the closure panel is provided with a first spine, a second spine and a third spine arranged sequentially from the distal end to the proximal end. The two first straight arms of the first elastic clamping member are respectively connected to the two first spines, the two second straight arms of the second elastic clamping member are respectively connected to the two third spines, and the two compensating columns are respectively provided on the two second spines.

[0007] The present invention provides a compensating closure device, wherein the first straight arm is rotatably connected to the first spine, and the second straight arm is rotatably connected to the third spine.

[0008] The present invention provides a compensating closure device, wherein a first through hole is provided on the first spine, a second through hole is provided on the third spine, a first rotating shaft is provided at the end of the first straight arm, a second rotating shaft is provided at the end of the second straight arm, the first rotating shaft passes through the first through hole and is fixed by a pressure-recessed round tube, and the second rotating shaft passes through the second through hole and is fixed by a pressure-recessed round tube.

[0009] The present invention provides a compensating closure device, wherein a first through hole is provided on the first spine, a second through hole is provided on the third spine, a first ring is provided at the end of the first straight arm, a second ring is provided at the end of the second straight arm, the first ring is riveted to the first through hole by a rivet, and the second ring is riveted to the second through hole by a rivet.

[0010] The present invention provides a compensating closure device, wherein the first elastic clamping member and the second elastic clamping member are located on the same side of the upper clamping arm and the lower clamping arm.

[0011] The present invention provides a compensating closure device, wherein the first elastic clamping member and the second elastic clamping member are located on opposite sides of the upper clamping arm and the lower clamping arm, respectively.

[0012] The difference between this invention's compensating closure device and existing technologies lies in that the distal ends of the upper and lower clamping arms are held by a first elastic clamping member, while the proximal ends are held by a second elastic clamping member. Furthermore, the first elastic clamping member is positioned between two compensating posts, effectively compensating for the attenuation of closure force caused by the longer length of the first elastic clamping member. Simultaneously, because the second elastic clamping member is shorter, it exerts a large closure force on the proximal ends of the upper and lower clamping arms, making it difficult to open the proximal ends of the clamping arms and potentially causing severe injury to the closed tissue. Through the compensating action of the compensating posts, the excessive closure force exerted by the second elastic clamping member on the proximal ends of the clamping arms is effectively distributed, achieving a reasonable balance between the closure forces at the proximal and distal ends of the clamping arms. Sufficient closure force can be generated using a relatively thin second elastic clamping member, minimizing the weight and size of the closure device and achieving safe and effective tissue closure. When in use, this compensating closure device opens from the distal end of the clamping arms, forming a V-shape, making it easy to capture tissue targets such as the left atrial appendage.

[0013] The invention will now be further described with reference to the accompanying drawings. Attached Figure Description

[0014] Figure 1 This is a front view of a first embodiment of the compensating closure device of the present invention;

[0015] Figure 2 This is a rear view of Embodiment 1 of the compensating closure device of the present invention;

[0016] Figure 3 This is a front view of Embodiment 2 of the compensating closure device of the present invention;

[0017] Figure 4 This is a rear view of Embodiment 2 of the compensating closure device of the present invention;

[0018] Figure 5 This is a front view of Embodiment 3 of the compensating closure device of the present invention;

[0019] Figure 6 This is a rear view of Embodiment 3 of the compensating closure device of the present invention;

[0020] Figure 7 This is a front view of Embodiment 4 of the compensating closure device of the present invention;

[0021] Figure 8 This is a rear view of Embodiment 4 of the compensating closure device of the present invention;

[0022] Figure 9 This is a front view of the upper clamping arm in this invention;

[0023] Figure 10 This is a front view of the lower clamping arm in this invention;

[0024] Figure 11 This is a top view of the upper clamping arm in this invention;

[0025] Figure 12 This is a left view of the upper clamping arm in this invention;

[0026] Figure 13 This is a perspective view of the first embodiment of the elastic clamping member in this invention;

[0027] Figure 14 This is a front view of the first embodiment of the elastic clamping member in this invention;

[0028] Figure 15 This is a perspective view of Embodiment 1 of the second elastic clamping member in this invention;

[0029] Figure 16 This is a front view of Embodiment 1 of the second elastic clamping member in this invention;

[0030] Figure 17 This is a front view of Embodiment 2 of the first elastic clamping member in this invention;

[0031] Figure 18 This is a front view of Embodiment 2 of the second elastic clamping member in this invention;

[0032] Figure 19 This is a schematic diagram of the structure of the indented circular tube in this invention;

[0033] Figure 20 For along Figure 19 View A in the middle;

[0034] Figure 21This is a schematic diagram of the rivet structure in this invention;

[0035] Figure 22 This is a diagram showing the riveting state of the rivets in this invention. Detailed Implementation

[0036] like Figure 1 As shown, and in combination Figure 2-8 As shown, the compensating closure device of the present invention includes an upper clamping arm 121, a lower clamping arm 122, a first elastic clamping member 111, and a second elastic clamping member 112. The two ends of the first elastic clamping member 111 are respectively connected to the distal ends of the upper clamping arm 121 and the lower clamping arm 122, and the two ends of the second elastic clamping member 112 are respectively connected to the proximal ends of the upper clamping arm 121 and the lower clamping arm 122. The first elastic clamping member 111 is clamped between two compensating posts 131, which are respectively located between the distal and proximal ends of the upper clamping arm 121 and the lower clamping arm 122. The first elastic clamping member 111 and the second elastic clamping member 112 are arranged along the extending direction of the upper clamping arm 121 and the lower clamping arm 122.

[0037] like Figure 13 As shown, and in combination Figure 14 , 17 As shown, the first elastic clamping member 111 includes a first U-shaped arm 116, with a first straight arm 115 connected to each end of the first U-shaped arm 116. The second elastic clamping member 112 includes a second U-shaped arm 118, with a second straight arm 117 connected to each end of the second U-shaped arm 118. The ends of the two first straight arms 115 are connected to the distal ends of the upper clamping arm 121 and the lower clamping arm 122, respectively. The ends of the two second straight arms 117 are connected to the proximal ends of the upper clamping arm 121 and the lower clamping arm 122, respectively. The two first straight arms 115 are clamped between the two compensating columns 131.

[0038] The first elastic clamping member 111 and the second elastic clamping member 112 can be manufactured from elastic materials such as medical nickel-titanium alloy or medical stainless steel through heat treatment.

[0039] like Figure 9 As shown, and in combination Figure 10-12 As shown, both the upper clamping arm 121 and the lower clamping arm 122 include a closed panel 126. The closed panel 126 is provided with a first spine 141, a second spine 142 and a third spine 143 arranged sequentially from the distal end to the proximal end. The two first straight arms 115 of the first elastic clamping member 111 are respectively connected to the two first spines 141. The two second straight arms 117 of the second elastic clamping member 112 are respectively connected to the two third spines 143. The two compensation columns 131 are respectively provided on the two second spines 142.

[0040] The upper clamping arm 121 and the lower clamping arm 122 can be manufactured from commonly used medical materials such as medical stainless steel and medical nickel-titanium alloy through casting, machining, and other methods. In the attached drawing, the upper clamping arm 121 and the lower clamping arm 122 are mirror images. In actual applications, the upper clamping arm 121 and the lower clamping arm 122 may not necessarily be mirror images and can be completely identical structures.

[0041] The present invention provides a compensating closure device, wherein the first straight arm 115 is rotatably connected to the first spine 141, and the second straight arm 117 is rotatably connected to the third spine 143.

[0042] like Figure 1 As shown, and in combination Figure 2-4 As shown in Figures 13-16 and 19-20, the first spinal column 141 has a first through hole 124, the third spinal column 143 has a second through hole 125, the end of the first straight arm 115 has a first rotating shaft 114, the end of the second straight arm 117 has a second rotating shaft 113, the first rotating shaft 114 passes through the first through hole 124 and is fixed by a pressure tube 150, and the second rotating shaft 113 passes through the second through hole 125 and is fixed by a pressure tube 150.

[0043] like Figure 5 As shown, and in combination Figure 6-8 17-18, 21-22, wherein the first spine 141 has a first through hole 124, the third spine 143 has a second through hole 125, the end of the first straight arm 115 has a first ring 180, the end of the second straight arm 117 has a second ring 181, the first ring 180 is riveted to the first through hole 124 by a rivet 200, and the second ring 181 is riveted to the second through hole 125 by a rivet 200.

[0044] like Figure 1 As shown, and in combination Figure 2 , 5 As shown in Figures 6 and 7, the first elastic clamping member 111 and the second elastic clamping member 112 are located on the same side of the upper clamping arm 121 and the lower clamping arm 122.

[0045] like Figure 1As shown, the first elastic clamping member 111 and the second elastic clamping member 112 are assembled on the same side of the upper clamping arm 121 and the lower clamping arm 122. The first rotating shaft 114 of the first elastic clamping member 111 passes through the first through hole 124 and is fixed by a dented tube 150. The second rotating shaft 113 of the second elastic clamping member 112 passes through the second through hole 125 and is fixed by a dented tube 150. Finally, the first straight arm 115 of the first elastic clamping member 111 is respectively clamped between the two compensating columns 131. 131 has three functions: First, it ensures that the upper clamping arm 121, the lower clamping arm 122, and the first elastic clamping member 111 are on the same plane or that the planes on which they are located are parallel, thus preventing the upper clamping arm 121 and the lower clamping arm 122 from intersecting and affecting the closure effect; second, it effectively compensates for the phenomenon that the distal end of the clamping arm is weak due to the excessive length of the first straight arm 115 of the first elastic clamping member 111; third, it effectively disperses the excessive closing force exerted by the second elastic clamping member 112 on the proximal end of the closing panel 126, thereby preventing tissue injury. The pressure tube 150 can be a commonly used medical material such as medical stainless steel tube or medical nickel-titanium alloy tube.

[0046] like Figure 5 As shown, the first elastic clamping member 111 and the second elastic clamping member 112 are assembled on the same side of the upper clamping arm 121 and the lower clamping arm 122 in the following manner: the first ring 180 of the first elastic clamping member 111 and the second ring 181 of the second elastic clamping member 112 are respectively riveted to the first through hole 124 and the second through hole 125 with rivets 200.

[0047] like Figure 3 As shown, and in combination Figure 4 , 7 As shown in Figures 8 and 9, the first elastic clamping member 111 and the second elastic clamping member 112 are located on opposite sides of the upper clamping arm 121 and the lower clamping arm 122, respectively.

[0048] like Figure 3 As shown, the first elastic clamping member 111 and the second elastic clamping member 112 are assembled on opposite sides of the upper clamping arm 121 and the lower clamping arm 122 in the following manner: the first rotating shaft 114 of the first elastic clamping member 111 and the second rotating shaft 113 of the second elastic clamping member 112 are fixed with a pressure tube 150.

[0049] like Figure 7 As shown, the first elastic clamping member 111 and the second elastic clamping member 112 are assembled on opposite sides of the upper clamping arm 121 and the lower clamping arm 122 in the following manner: the first ring 180 of the first elastic clamping member 111 and the second ring 181 of the second elastic clamping member 112 are respectively riveted to the first through hole 124 and the second through hole 125 with rivets 200. The rivets can be drive rivets, and their material can be medical-grade stainless steel. Figure 21 As shown, and in combination Figure 22As shown, rivet 200 includes rivet head 160, rivet core 190 and rivet core head 170.

[0050] The distal ends of the upper clamping arm 121 and the lower clamping arm 122 of the present invention are clamped by the first elastic clamping member 111, and the proximal ends are clamped by the second elastic clamping member 112. The first elastic clamping member 111 is clamped between two compensating posts 131, which effectively compensates for the attenuation of the closing force caused by the long length of the first elastic clamping member 111. At the same time, because the second elastic clamping member 112 is relatively short, the closing force generated on the proximal ends of the upper clamping arm 121 and the lower clamping arm 122 is very large, making it difficult for the proximal ends of the clamping arms to open and severely injuring the closed tissue. Through the compensating effect of the compensating posts 131, the excessive closing force of the second elastic clamping member 112 on the proximal ends of the clamping arms is effectively decomposed, so that the closing forces at the proximal and distal ends of the clamping arms tend to be reasonably balanced. Sufficient closing force can be generated with a relatively thin second elastic clamping member 112, minimizing the mass and size of the closing device and achieving safe and effective closure of tissue. When using the compensating closure device of this invention, it opens from the distal end of the clamp arm, forming an overall V-shape, which makes it easy to capture tissue targets such as the left atrial appendage.

[0051] In use, the compensating closure device is delivered to the root of the left atrial appendage using a dedicated delivery device (not shown in the figure). The delivery device lever is engaged, opening the head end of the device. Since the head end of the delivery device is fixed together with the upper clamping arm 121 and lower clamping arm 122 of the compensating closure device, the device is opened. The posture of the compensating closure device is adjusted to clinical requirements. The delivery device lever is released, and after confirming the closure position and posture are correct, the release button at the tail end of the delivery device is engaged to separate the compensating closure device from the delivery device. The compensating closure device then closes the target tissue and is withdrawn from the delivery device.

[0052] The advantages of this invention are as follows:

[0053] 1. When opened, it is V-shaped, meaning the distal opening makes it easy to capture target tissues such as the left atrial appendage.

[0054] Second, the distal opening can reduce wear on the target tissue, such as the left atrial appendage and adjacent tissues, and improve the clinical safety of the product from a structural perspective.

[0055] Third, the compensating structural design can effectively reduce the weight of the product and minimize the weight of the closure device. Because the closing force of the first straight arm 115 of the first elastic clamping member 111 acts on the upper clamping arm 121 and lower clamping arm 122 at the distal end, while the closing force of the first elastic clamping member 111 is generated by the first U-shaped arm 116, acting from the proximal end of the first straight arm 115 to the distal end, the closing force is significantly attenuated. To achieve effective closure at the distal end, the first straight arm 115 of the first elastic clamping member 111 needs to be lengthened and thickened, and the first U-shaped arm 116 of the first elastic clamping member 111 needs to be thickened to ensure sufficient distal closing force. This significantly increases the weight and volume of the closure device. The intervention of the compensating column 131 effectively compensates for the attenuation of closing force caused by the longer first straight arm 115 of the first elastic clamping member 111. Meanwhile, because the second straight arm 117 of the second elastic clamp 112 is relatively short, it generates a large closing force on the proximal ends of the upper clamp arm 121 and the lower clamp arm 122, making it difficult for the proximal ends of the clamp arms to open and severely injuring the closed tissue. Through the compensating effect of the compensating column 131, the excessive closing force of the second elastic clamp 112 on the proximal ends of the clamp arms is effectively decomposed, so that the closing forces at the proximal and distal ends of the clamp arms tend to be reasonably balanced. Sufficient closing force can be generated with a relatively thin elastic clamp, minimizing the mass and size of the closure device and achieving safe and effective closure of the tissue clamped between the closure panels 126.

[0056] Fourth, the first rotating shaft 114 of the first elastic clamping member 111 can rotate freely in the first through hole 124, and the second rotating shaft 113 of the second elastic clamping member 112 can rotate freely in the second through hole 125. The closing panel 126 can dynamically distribute the closing force of the first elastic clamping member 111 and the second elastic clamping member 112 according to the tissue clamped therein. The advantages of this distribution are obvious. It can ensure that the tissue between the closing panels 126 is completely closed and overcome the risk of tissue injury due to excessive local force.

[0057] Fifth, the first elastic clamping member 111, the second elastic clamping member 112, the upper clamping arm 121, and the lower clamping arm 122 are in the same extending direction, which minimizes the volume of the closure.

[0058] 6. The first elastic clamping member 111 and the second elastic clamping member 112 act on the distal and proximal ends of the upper clamping arm 121 and the lower clamping arm 122, respectively, to ensure the effective closure of the entire closed panel 126.

[0059] VII. Based on actual clinical needs, in different products, the distance between the two first through holes 124 can be adjusted by the height of the first spine 141 to ensure that the closing force at the distal end of the closing panel 126 meets the actual requirements. Similarly, the distance between the two second through holes 125 can also be adjusted by the height of the second spine 142 to ensure that the closing force at the proximal end of the closing panel 126 meets the actual requirements. The advantages of this design are obvious: even the thinnest tissue can obtain sufficient clamping force, the effective clamping tissue types of the closing device are expanded, and the clinical application range is more extensive, such as clamping valve leaflets.

[0060] 8. Adjusting the relative position of the compensation column 131, such as its height relative to the closing panel 126 and its distance relative to the first through hole 124, can effectively distribute the closing force at the proximal and distal ends of the closing panel 126, thereby more flexibly meeting clinical needs.

[0061] 9. The cross-sections of the first elastic clamping member 111 and the second elastic clamping member 112 can be arbitrarily selected without causing the closed panel 126 to intersect, thus reducing the processing difficulty.

[0062] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A compensating closure device, characterized in that: The device includes an upper clamping arm, a lower clamping arm, a first elastic clamping member, and a second elastic clamping member. The two ends of the first elastic clamping member are respectively connected to the distal ends of the upper and lower clamping arms, and the two ends of the second elastic clamping member are respectively connected to the proximal ends of the upper and lower clamping arms. The first elastic clamping member clamps between two compensating posts, which are respectively located between the distal and proximal ends of the upper and lower clamping arms. The first and second elastic clamping members are arranged along the extending direction of the upper and lower clamping arms. The first elastic clamping member includes a first U-shaped arm, with a first straight arm connected to each end of the first U-shaped arm. The second elastic clamping member includes a second U-shaped arm... The first clamping arm has two first straight arms connected to its ends. The ends of the first two straight arms are connected to the distal ends of the upper clamping arm and the lower clamping arm, respectively. The ends of the second two straight arms are connected to the proximal ends of the upper clamping arm and the lower clamping arm, respectively. The two first straight arms are clamped between the two compensation columns. The upper clamping arm and the lower clamping arm each include a closed panel. The closed panel is provided with a first spine, a second spine, and a third spine arranged sequentially from the distal end to the proximal end. The two first straight arms of the first elastic clamping member are connected to the two first spines, respectively. The two second straight arms of the second elastic clamping member are connected to the two third spines, respectively. The two compensation columns are respectively located on the two second spines.

2. The compensating closure device according to claim 1, characterized in that: The first straight arm is rotatably connected to the first spine, and the second straight arm is rotatably connected to the third spine.

3. The compensating closure device according to claim 2, characterized in that: The first spinal column has a first through hole, and the third spinal column has a second through hole. The end of the first straight arm has a first pivot, and the end of the second straight arm has a second pivot. The first pivot passes through the first through hole and is fixed by a dented tube. The second pivot passes through the second through hole and is fixed by a dented tube.

4. The compensating closure device according to claim 2, characterized in that: The first spine has a first through hole, the third spine has a second through hole, the end of the first straight arm has a first ring, the end of the second straight arm has a second ring, the first ring is riveted to the first through hole by a rivet, and the second ring is riveted to the second through hole by a rivet.

5. The compensating closure device according to claim 3 or 4, characterized in that: The first elastic clamping member and the second elastic clamping member are located on the same side of the upper clamping arm and the lower clamping arm.

6. The compensating closure device according to claim 3 or 4, characterized in that: The first elastic clamping member and the second elastic clamping member are located on opposite sides of the upper clamping arm and the lower clamping arm, respectively.

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