A femtosecond lens separation shovel with a U-shaped bending structure

Abstract

The present invention discloses a femtosecond lens separation shovel with a U-shaped bending structure, which includes a handle and a separation shovel integrally formed with the handle; the separation shovel includes a linear portion, a U-shaped portion and an arc-shaped portion connected in sequence, the linear portion is coaxially connected to the handle, and the linear portion and the arc-shaped portion are smoothly connected to the two ends of the U-shaped portion respectively; the cross-sections of the linear portion, the U-shaped portion and the arc-shaped portion are all circular, and the cross-sectional diameter gradually decreases from the linear portion to the arc-shaped portion. The present invention uses a U-shaped portion with a U-shaped geometric transition structure to transition between the linear portion and the arc-shaped portion of the separation shovel, which can effectively avoid the linear end from contacting the cornea when the lens separation shovel enters the cornea, thereby stimulating the patient's corneal wound; and can expand the surgical operation space.

Description

Technical Field

[0001] The invention belongs to the technical field of medical instruments, and relates to auxiliary instruments for all-femtosecond laser surgery, and in particular to a femtosecond lens separation shovel with a U-shaped bending structure. Background Art

[0002] Myopia is a type of refractive error. When the eye is in a relaxed state, parallel light rays enter the eye and focus in front of the retina, which results in the inability to form a clear image on the retina, which is called myopia. In recent years, the incidence of myopia in my country has shown a clear upward trend. Myopia has become a major public health issue affecting the eye health of Chinese people, especially young people. This most common type of ophthalmic disease is listed as one of the three major diseases in the world. The incidence of myopia in the Chinese population is about 33%, which is 1.5 times the world average (22% of the total population).

[0003] The all-femtosecond laser surgery is one of the most advanced corneal refractive surgery modes in the world, which has brought the safety and accuracy of myopia correction to a new level. The main technical core is to accurately position the laser in the corneal stroma, make the corneal mechanism lens and then remove it, thereby changing the refractive power of the cornea.

[0004] The all-femtosecond laser surgery is mainly divided into two steps. The first step is to scan the corneal stroma with a femtosecond laser to make a corneal stroma lens; the second step is to separate the prepared corneal stroma lens with surgical instruments and remove it from a 3-4mm incision to complete the surgery. Due to the unique light explosion effect of the femtosecond laser, many explosion points appear between the corneal stroma layers after the laser scanning is completed, but there is still unbroken tissue between the points, which is called "bridge-like tissue". These bridge-like tissues need to be further separated gently and well by surgical instruments. Therefore, good laser scanning quality and mature lens separation technology are the key factors for the success of the surgery.

[0005] Application number CN201120223177.X discloses a corneal interlayer lens separator for all-femtosecond laser surgery, comprising a separation hook handle, a front portion of the separation hook and a rear portion of the separation hook that are connected as one body; the rear portion of the separation hook is inserted into one end of the separation hook handle and coaxially fixed; the bending angle between the front portion of the separation hook and the rear portion of the separation hook is 90° to 130°; the front portion of the separation hook is flat and slender, and the end working portion is flat and spoon-shaped.

[0006] Application number CN2018220811031 discloses a full-femtosecond separator, including a separation hook handle, with the rear of the separation hook connected to both ends of the separation hook handle, and the end of the rear of the separation hook away from the separation hook handle is the front of the separation hook, and the front of the separation hook is in the shape of a flat soup spoon.

[0007] Therefore, existing all-femtosecond separation instruments are usually single-hook structures, and the end in contact with the cornea is rounded and blunt or flat and round. The existing all-femtosecond separation instruments have at least the following technical defects in clinical use: 1) The arc end of the existing separator is too long, which means that during surgery, the eyelid opener needs to be pressed down to obtain enough space to insert the lens cut out of the cornea by the laser. This situation causes inconvenience to the surgical process and easily increases the risk of surgery; 2) The round shovel end of the existing separator is a round and blunt structure, resulting in a small contact area with the cornea, which is easy to tear or pierce the cornea and cause medical accidents; and because ophthalmic surgery needs to be performed under a high-power magnifying glass, the end of the flat structure is easy to block the doctor's line of sight, affecting the surgery; furthermore, the flat structure itself has a large area and a large periphery. When separating the matrix lens, a slightly larger movement can easily scratch the corneal stroma, causing tissue edema, and high requirements for the operator's use; 3) The handle is relatively simple, and anti-slip patterns are directly set throughout the handle; however, when the separator is held in hand for operation, the position where the handle contacts the base of the thumb increases unnecessary resistance due to the presence of the anti-slip patterns; and the separation operation is very delicate, and the hands are prone to sweating, and the anti-slip effect of the anti-slip patterns after sweating is very limited.

[0008] In summary, designing and optimizing the lens separator used in all-femtosecond laser surgery to make it more operationally safe is of great significance for improving the quality of all-femtosecond laser surgery. Summary of the invention

[0009] The purpose of the present invention is to provide a femtosecond lens separation shovel with a U-shaped bending structure to improve the operational safety through structural optimization, in order to solve the problems of great surgical difficulty and low safety factor caused by the unreasonable design of the lens separator used in the above-mentioned existing all-femtosecond laser surgery.

[0010] In order to achieve the above object, the present invention adopts the following technical solutions.

[0011] The femtosecond lens separation shovel with a U-shaped bending structure provided by the present invention comprises a handle and a separation shovel integrally formed with the handle; the separation shovel comprises a linear portion, a U-shaped portion and an arc-shaped portion connected in sequence, the linear portion is coaxially connected to the handle, and the linear portion and the arc-shaped portion are smoothly connected to the connection positions of the two ends of the U-shaped portion respectively; the cross-sections of the linear portion, the U-shaped portion and the arc-shaped portion are all circular, and the cross-sectional diameter gradually decreases from the linear portion to the arc-shaped portion.

[0012] Furthermore, the linear portion, U-shaped portion and arc-shaped portion all have gradually changing diameters and become gradually thinner; the maximum cross-sectional diameter of the linear portion is 1 to 1.5 mm; the minimum cross-sectional diameter of the arc-shaped portion is 0.25 to 0.35 mm; in a further preferred implementation, the maximum cross-sectional diameter of the linear end is 1 mm; the minimum cross-sectional diameter of the arc-shaped portion is 0.3 mm.

[0013] Furthermore, the length of the linear portion is 9 to 10 mm. In a further preferred implementation, the length of the linear portion is 9 mm.

[0014] Furthermore, the U-shaped portion includes an arc segment and a first connecting portion and a second connecting portion located at both ends of the arc segment and smoothly connected to the linear portion and the arc portion respectively; the radius of the arc segment is 0.2-0.3 mm, and the arc is 80-120°. The vertical distance between the outer bottom end of the U-shaped portion and the axis of the linear portion is 0.5-2 mm.

[0015] Furthermore, the arc-shaped portion is in the shape of a circular arc, with an arc length of 8 to 9 mm and an arc angle of 50 to 90°.

[0016] Furthermore, the handle is cylindrical in structure and is designed with at least two regularly arranged annular concave-convex patterns; each annular concave-convex pattern is composed of a number of equally spaced annular grooves arranged along the axial direction of the handle. The grooves are 1 to 2 mm wide and 0.5 to 1 mm deep.

[0017] Compared with the prior art, the femtosecond lens separation shovel with a U-shaped bending structure provided by the present invention has the following beneficial effects:

[0018] (1) The present invention uses a U-shaped portion with a U-shaped geometric transition structure to transition between the linear portion and the arc portion of the separation shovel, which can effectively prevent the linear end of the lens separation shovel from contacting the cornea when entering the cornea, thereby irritating the patient's corneal wound; and can also expand the surgical operation space;

[0019] (2) The end of the arc-shaped portion of the present invention is a tapered structure with a gradually changing diameter, which makes it easier to perform surgical operations without affecting the doctor's field of vision;

[0020] (3) The present invention shortens the length of the linear part and the arc-shaped part of the separation shovel while ensuring the surgical operation space. The shortened length of the linear part makes it easier for the doctor to hold it, and the shortened length of the arc-shaped part makes it easier to insert it into the patient's eyeball, avoiding contact with other parts of the patient's eye to cause surgical risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 The femtosecond lens separation shovel with a U-shaped bending structure is a three-dimensional diagram;

[0023] Figure 2The main view is of a femtosecond lens separation shovel with a U-shaped bending structure;

[0024] Figure 3 Schematic diagram of the separation shovel structure ( Figure 2 (enlarged view of part A in the middle). DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0026] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0028] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the invention product is usually placed when in use, or the orientation or positional relationship commonly understood by those skilled in the art, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Example

[0031] The femtosecond lens separation shovel with a U-shaped bending structure improved in this embodiment, refer to Figure 1-2 As shown, it comprises a handle 1 and a separation shovel 2 integrally formed with the handle.

[0032] The handle is cylindrical in structure and is designed with at least two regularly arranged annular concave-convex patterns; each annular concave-convex pattern is composed of a number of equally spaced annular grooves arranged along the axial direction of the handle. The groove width is 1 to 2 mm and the depth is 0.5 to 1 mm. Figure 1 and Figure 2 As shown, in this embodiment, the total length of the handle is 80 mm, and the surface is smooth metallic silver-white. The handle is designed with two regularly arranged annular concave-convex patterns, and each section is provided with an annular groove with a width of 1 mm and a depth of 0.5 mm, so as to prevent slipping through the annular concave-convex pattern without affecting the doctor's hand feeling.

[0033] like Figures 1 to 3 As shown, the separation shovel 2 includes a linear portion 21, a U-shaped portion 22 and an arc-shaped portion 23 connected in sequence, the linear portion 21 is coaxially connected to the handle, and the linear portion 21 and the arc-shaped portion 23 are smoothly connected to the two ends of the U-shaped portion respectively; the cross-sections of the linear portion 21, the U-shaped portion and the arc-shaped portion are all circular, and the cross-sectional diameter gradually decreases from the linear portion to the arc-shaped portion.

[0034] The diameters of the linear portion, the U-shaped portion and the arc-shaped portion are gradually changing and becoming thinner; the maximum cross-sectional diameter of the linear portion is 1 to 1.5 mm; the minimum cross-sectional diameter of the arc-shaped portion is 0.25 to 0.35 mm. In this embodiment, the maximum cross-sectional diameter of the linear end is 1 mm; the minimum cross-sectional diameter of the arc-shaped portion is 0.3 mm. In this way, it is easier to perform surgery without affecting the doctor's field of vision.

[0035] The length of the linear portion is 9 to 10 mm. In this embodiment, the length of the linear portion is 9 mm; compared with the traditional transparent separator for femtosecond surgery, the length of the linear portion is shortened, which is convenient for doctors to hold. The linear portion is connected to the handle by interference fit.

[0036] The U-shaped portion includes an arc segment 221 and a first connection portion 222 and a second connection portion 223 (both the first connection portion and the second connection portion are polished and smooth) located at both ends of the arc segment and smoothly connected to the linear portion and the arc portion respectively; the radius of the arc segment is 0.2-0.3 mm, and the curvature is 80-120°. The vertical distance between the outer bottom end of the U-shaped portion and the axis of the linear portion is 0.5-2 mm. In this embodiment, the radius of the arc segment is 0.2 mm, the curvature is 107°, and the vertical distance between the outer bottom end of the U-shaped portion and the axis of the linear portion is 0.75 mm. The geometric turning structure of the U-shaped portion prevents the linear portion from contacting the cornea when the instrument enters the cornea, and the operating space is larger. And because the vertical distance between the outer bottom end of the U-shaped portion and the axis of the linear portion is only 0.5-2 mm, shortening this distance can reduce the contact between the instrument and other parts of the patient's eye, causing surgical risks.

[0037] The arc-shaped portion is in an arc shape, and its arc bending direction is away from the linear portion. The arc length of the arc-shaped portion is 8 to 9 mm, and the arc angle is 50 to 90 degrees. This size conforms to most corneal shapes and is convenient for doctors to perform surgical operations. In this embodiment, the arc length of the arc-shaped portion is 8.5 mm, and the arc angle is 60 degrees.

[0038] The separation shovel is made of (stainless steel) material, which is more durable while ensuring lightness and has better biocompatibility; and the design process of the separation shovel can be modeled using parametric design software, and different types of instruments with different parameters can be provided for different types of patients. The handle is made of (stainless steel or 3D printing) material, and the handle part is replaced with 3D printing material, which can not only greatly save production costs, but also can be customized according to the doctor's habits.

[0039] The method of using the femtosecond lens separation shovel with a U-shaped bending structure is as follows: during the all-femtosecond surgery, the laser scans twice, the first scan cuts out the corneal lens, the second laser scan cuts out a small opening for the instrument to be inserted, and then the separation shovel is replaced, and the separation shovel handle 1 is held under a high-power magnifying glass, so that the separation shovel directly contacts the cornea of ​​the eye, and the arc-shaped part of the separation shovel is used to separate the corneal lens, and then tweezers are used to remove it. Due to the setting of the U-shaped part with optimized size, it can effectively avoid the linear end from contacting the cornea, irritating the patient's corneal wound, and improving the patient's experience; and it can expand the doctor's surgical operation space.

[0040] The present invention is not limited to the above-mentioned optional implementation modes. Anyone can derive other various forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, all technical solutions that fall within the scope defined by the claims of the present invention fall within the protection scope of the present invention.

Claims

1. A femtosecond lens separation shovel with a U-shaped bending structure, characterized in that: The invention comprises a handle (1) and a separation shovel (2) integrally formed with the handle; the separation shovel (2) comprises a linear portion (21), a U-shaped portion (22) and an arc-shaped portion (23) connected in sequence, the linear portion (21) being coaxially connected to the handle, and the linear portion (21) and the arc-shaped portion (23) are smoothly connected to the two ends of the U-shaped portion respectively; the cross-sections of the linear portion (21), the U-shaped portion and the arc-shaped portion are all circular, and the cross-sectional diameters gradually decrease from the linear portion to the arc-shaped portion; the U-shaped portion comprises an arc segment (221) and a first connecting portion (222) and a second connecting portion (223) located at the two ends of the arc segment and smoothly connected to the linear portion and the arc-shaped portion respectively; the radius of the arc segment is 0.2-0.3 mm, and the arc is 80-120°; the vertical distance between the outer bottom end of the U-shaped portion (22) and the axis of the linear portion (21) is 0.5-2 mm.

2. The femtosecond lens separation shovel with a U-shaped bending structure according to claim 1, characterized in that: The linear portion (21), the U-shaped portion (22) and the arc-shaped portion (23) all have gradually changing diameters and gradually become thinner; the maximum cross-sectional diameter of the linear portion (21) is 1 to 1.5 mm; and the minimum cross-sectional diameter of the arc-shaped portion (23) is 0.25 to 0.35 mm.

3. The femtosecond lens separation shovel with a U-shaped bending structure according to claim 1 or 2, characterized in that: The linear portion (21) has a length of 9 to 10 mm.

4. The femtosecond lens separation shovel with a U-shaped bending structure according to claim 1 or 2, characterized in that: The arc-shaped portion (23) is in the shape of an arc, with an arc length of 8 to 9 mm and an arc angle of 50 to 90°.

5. The femtosecond lens separation shovel with a U-shaped bending structure according to claim 1, characterized in that: The handle (1) is an overall cylindrical structure and is designed with at least two sections of annular concave-convex patterns; each section of the annular concave-convex pattern is composed of a number of equally spaced annular grooves (11) arranged along the axial direction of the handle.

6. The femtosecond lens separation shovel with a U-shaped bending structure according to claim 5, characterized in that: The groove (11) has a width of 1 to 2 mm and a depth of 0.5 to 1 mm.

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