A femtosecond laser cataract surgery instrument and application method

Abstract

The invention relates to a femtosecond laser cataract surgical instrument and an application method. The instrument comprises a support, a femtosecond laser generator is arranged on the support, and a suction pipe, an operating handle is arranged at the tail end of the suction pipe and is connected to a negative pressure generator, and an arc-shaped suction head with an opening facing downward is arranged at the front end of the suction pipe; an opening is arranged on the upper surface of the suction head, a first reflecting mirror is arranged at the opening, a focus indicating unit indicating the current focus position of the femtosecond laser generator is arranged on the support, and a control unit for controlling the operation of the femtosecond laser generator and the negative pressure generator is arranged on the operating handle; ultrasonic energy does not need to be applied, cleaning is relatively thorough, large-scale fragments are not formed so that the fragments are difficult to clean, the instrument has good adaptability to the lenses of patients in different conditions, does not need to perform complex calculations on the precision of nuclear fragmentation, and the improvement of the suction head is very small, the cost can be controlled within an acceptable range, and the industry problems encountered in the current femtosecond laser cataract surgery are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of ophthalmic surgical instruments, and more specifically, to a femtosecond laser cataract surgical instrument and an application method thereof. Background Art

[0002] The working principle of femtosecond cataract surgery is to use femtosecond laser to cut the cornea to form an incision, then perform continuous manual circular capsulotomy on the lens capsule, remove the anterior capsule, chop the nucleus into small pieces and remove them by ultrasonic emulsification, and finally implant an artificial lens from the incision. Compared with traditional cataract surgery methods, the advantages of femtosecond cataract surgery are mainly reflected in two aspects: 1. The surgery is more precise. Due to the precision of femtosecond laser, the surgical incision is small and neat, which greatly improves the accuracy and safety of the surgery; 2. The surgery causes little damage and has good results. The patient recovers quickly after the surgery and can return to daily life faster.

[0003] In actual clinical operation, since the fragmentation of the nucleus still requires the help of ultrasonic energy to a certain extent, it will still cause certain damage to the human eye, and the number of fragments after ultrasonic fragmentation is large, and it is easy to have a lot of residual fragments; and the technology currently under research completely relies on femtosecond laser for fragmentation of the nucleus. Due to the differences in the conditions of the lens nucleus of patients, it still faces great difficulties in clinical practice (each patient needs to be tested multiple times, and a targeted and accurate fragmentation plan is issued, and femtosecond laser debugging is required);

[0004] Chinese patent application number CN201610092343.4 provides a femtosecond laser cataract emulsification treatment system, which achieves nucleus fragmentation during suction by integrating a femtosecond laser generator inside the suction tip. However, this theoretical concept is difficult to implement. The main reason is that the application of femtosecond laser requires high focusing accuracy and a relatively stable output environment. Integrating it into the suction tip requires too high precision control, and the equipment manufacturing cost will be very high. There is a need for a low-cost femtosecond laser cataract surgical instrument and application method that can reduce the differential interference of the patient's lens nucleus and completely rely on femtosecond laser for nucleus fragmentation. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a femtosecond laser cataract surgical instrument and an application method of the femtosecond laser cataract surgical instrument in view of the above-mentioned defects of the prior art.

[0006] The technical solution adopted by the present invention to solve the technical problem is:

[0007] A femtosecond laser cataract surgical instrument is constructed, comprising a support, on which a femtosecond laser generator is arranged, and a suction pipe, wherein the tail end of the suction pipe is provided with an operating handle and connected to a negative pressure generator, and the front end of the suction pipe is provided with an arc-shaped suction head with an opening facing downward; an opening is provided on the upper surface of the suction head, and a first reflecting mirror is provided at the opening, the first reflecting mirror is used to reflect the femtosecond laser beam entering through the opening into the inner hole of the suction head for nucleus fragmentation, and at the same time, the lower end of the first reflecting mirror extends into the inner hole of the suction head and forms a suction gap with the inner wall of the inner hole; a focus indicating unit indicating the current focus position of the femtosecond laser generator is provided on the support, and the focus indicating unit includes a plurality of indicator beam generators obliquely downward, and the intersection of the beams emitted by the plurality of indicator beam generators is the focus of the femtosecond laser generator; a control unit for controlling the operation of the femtosecond laser generator and the negative pressure generator is provided on the operating handle.

[0008] The femtosecond laser cataract surgical instrument of the present invention is characterized in that a second reflector is provided at the front end of the inner hole of the suction head, the first reflector reflects the femtosecond laser beam in a direction toward the second reflector, and the second reflector reflects the femtosecond laser beam in a direction toward the suction gap.

[0009] The femtosecond laser cataract surgical instrument described in the present invention is characterized in that the first reflector is in the shape of a triangular leg, and one of the right-angled sides closes the opening, the other right-angled side is close to the second reflector, and the hypotenuse is provided with a reflective coating; the lower end portion of the first reflector and the inner wall of the inner hole form the suction gap.

[0010] In the femtosecond laser cataract surgical instrument of the present invention, the second reflector is a plane mirror and is fixedly arranged obliquely at the bend of the inner hole of the suction head.

[0011] The femtosecond laser cataract surgical instrument of the present invention is characterized in that the upper surface of the first reflector is lower than the edge of the opening.

[0012] The femtosecond laser cataract surgical instrument of the present invention is characterized in that the edge of the opening is provided with a conical surface.

[0013] The femtosecond laser cataract surgical instrument of the present invention, wherein the focus indication unit comprises a bracket for fixing a plurality of indication beam generators, and a manipulator for adjusting the deflection and lifting of the bracket is arranged on the bracket.

[0014] A femtosecond laser cataract surgery instrument application method is applied to the femtosecond laser cataract surgery instrument as described above, wherein the method comprises the following steps:

[0015] After the femtosecond laser generator completes the lens nucleus pre-chopping operation, the focus of the femtosecond laser generator moves to a first position close to the edge of the lens nucleus;

[0016] Insert the suction tube through the opening of the cornea and move it around the first position, sucking up the broken nucleus several times during the movement;

[0017] The lens fragments after pre-cleavage are sucked and moved to the focal position indicated by the opening and the focal indication unit. The femtosecond laser generator is controlled by the control unit to operate. The emitted laser beam is reflected by the first reflector to cleave the lens fragments sucked into the inner hole of the suction head. The cleaved materials are sucked away through the suction gap.

[0018] The focus of the femtosecond laser generator is moved to a second position close to the edge of the lens nucleus, and the suction tube is moved with the second position as the center, and the above suction and fragmentation operation is repeated during the movement;

[0019] The focus of the femtosecond laser generator is moved to a third position close to the edge of the lens nucleus, and the suction tube is moved with the third position as the center, and the above suction and fragmentation operation is repeated multiple times during the movement;

[0020] The focus of the femtosecond laser generator is moved to a fourth position close to the center of the lens nucleus, and the suction tube is moved with the fourth position as the center, and the above-mentioned suction and fragmentation operation is repeated during the movement;

[0021] The focus of the femtosecond laser generator is moved to the fifth position close to the edge of the lens nucleus, and the suction tube is moved with the fifth position as the center, and the above-mentioned suction and fragmentation operation is performed multiple times during the movement.

[0022] The beneficial effects of the present invention are as follows: after the femtosecond laser generator completes the pre-cleavage operation of the lens, the focus of the femtosecond laser generator moves to a first position close to the edge of the lens nucleus; the suction tube is inserted from the opening of the cornea and moved with the first position as the center, and the suction and nucleus breaking operation is performed multiple times during the movement; the lens fragments after the pre-cleavage are sucked and moved to the focal position indicated by the opening and the focus indication unit, and the operation of the femtosecond laser generator is controlled by the control unit, and the emitted laser beam is reflected by the first reflecting mirror to break the lens fragments sucked into the inner hole of the suction head, and the broken nucleus material is sucked away through the suction gap; the focus of the femtosecond laser generator moves to a first position close to ... into the opening of the cornea and the suction tube is moved to a first position close to the lens nucleus; the suction tube is inserted into the opening of the cornea and the suction tube is moved to a first position close to the lens nucleus; the suction tube is inserted into the opening of the cornea and the suction tube is moved to a first position close to the lens nucleus; the suction tube is inserted into the opening of the cornea and the suction tube is moved to a first position close to the lens nucleus; the suction tube is inserted into the opening of the cornea and the suction tube is moved to a first position close The focus of the femtosecond laser generator is moved to a second position close to the edge of the lens nucleus, the pipette moves with the second position as the center, and the above-mentioned suction and nucleus fragmentation operation is performed multiple times during the movement; the focus of the femtosecond laser generator is moved to a third position close to the edge of the lens nucleus, the pipette moves with the third position as the center, and the above-mentioned suction and nucleus fragmentation operation is performed multiple times during the movement; the focus of the femtosecond laser generator is moved to a fourth position close to the center of the lens nucleus, the pipette moves with the fourth position as the center, and the above-mentioned suction and nucleus fragmentation operation is performed multiple times during the movement; the focus of the femtosecond laser generator is moved to a fifth position close to the edge of the lens nucleus, the pipette moves with the fifth position as the center, and the above-mentioned suction and nucleus fragmentation operation is performed multiple times during the movement;

[0023] By applying the method of the present application, there is no need to apply ultrasonic energy, thus avoiding the damage caused by ultrasonic energy. The cleaning is relatively thorough and no large-scale fragments are formed that make the fragments difficult to clean. It has good adaptability to the lenses of patients in different conditions, does not require complex calculations of the accuracy of nucleus fragmentation (the lenses of patients in different conditions are different), and the improvement to the suction tip will be very small, and the cost can be controlled within an acceptable range, thereby solving the industry problems encountered in current femtosecond laser cataract surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work:

[0025] Figure 1 It is a schematic diagram of the structure of a femtosecond laser cataract surgery instrument according to a preferred embodiment of the present invention;

[0026] Figure 2 It is an enlarged cross-sectional view of a femtosecond laser cataract surgery instrument suction head according to a preferred embodiment of the present invention;

[0027] Figure 3 It is a schematic diagram of the focus position distribution of a femtosecond laser cataract surgery instrument in a preferred embodiment of the present invention;

[0028] Figure 4 It is a flow chart of the application method of the femtosecond laser cataract surgical instrument according to the preferred embodiment of the present invention. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will be described clearly and completely in combination with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are partial embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention.

[0030] The femtosecond laser cataract surgery instrument of the preferred embodiment of the present invention is as follows Figure 1 See also Figure 2 and Figure 3 , including a support 1, on which a femtosecond laser generator 2 is arranged, and also including a straw 3, the tail end of the straw 3 is provided with an operating handle 30 and is connected to a negative pressure generator 4, and the front end of the straw 3 is provided with an arc-shaped suction head 5 with an opening facing downward; an opening 50 is provided on the upper surface of the suction head 5, and a first reflector 51 is provided at the opening 50, and the first reflector 51 is used to reflect the femtosecond laser beam entering through the opening 50 into the inner hole of the suction head 5 for nuclear fragmentation, and at the same time, the lower end of the first reflector 51 extends into the inner hole of the suction head 5 and forms a suction gap 52 with the inner wall of the inner hole; a focus indicating unit 6 indicating the current focus position of the femtosecond laser generator 2 is arranged on the support 1, and the focus indicating unit 6 includes a plurality of indicator beam generators 60 obliquely downward, and the intersection of the beams emitted by the plurality of indicator beam generators 60 is the focus of the femtosecond laser generator 2; a control unit 31 for controlling the operation of the femtosecond laser generator 2 and the negative pressure generator 4 is arranged on the operating handle 30;

[0031] After the femtosecond laser generator 2 completes the lens pre-cleavage operation (the previous corneal opening, femtosecond laser capsulotomy, capsulorhexis, and pre-cleavage operations adopt the existing technology, which will not be described in detail), the focus of the femtosecond laser generator 2 moves to the first position 80 close to the edge of the lens nucleus;

[0032] Insert the suction tube 3 through the opening of the cornea and move it around the first position 80, and perform multiple suction and nucleus crushing operations during the movement; suck the lens fragments after pre-cleavage, move to the opening 50 and the focus position indicated by the focus indication unit 6, and control the operation of the femtosecond laser generator 2 through the control unit 31, and the emitted laser beam is reflected by the first reflector 51 to crush the lens fragments sucked into the inner hole of the suction head 5, and the crushed materials are sucked away through the suction gap 52;

[0033] The focus of the femtosecond laser generator 2 is moved to a second position 81 close to the edge of the lens nucleus, and the suction tube is moved with the second position as the center, and the above-mentioned suction and fragmentation operation is performed multiple times during the movement;

[0034] The focus of the femtosecond laser generator 2 is moved to a third position 82 close to the edge of the lens nucleus, and the suction tube is moved with the third position as the center, and the above-mentioned suction and fragmentation operation is repeated multiple times during the movement;

[0035] The focus of the femtosecond laser generator 2 is moved to a fourth position 83 close to the center of the lens nucleus, and the suction tube is moved with the fourth position as the center, and the above suction and fragmentation operation is performed multiple times during the movement;

[0036] The focus of the femtosecond laser generator 2 is moved to a fifth position 84 close to the edge of the lens nucleus, and the suction tube is moved with the fifth position as the center, and the above suction and fragmentation operation is repeated multiple times during the movement;

[0037] By using the method of the present application, there is no need to apply ultrasonic energy, thus avoiding the damage caused by ultrasonic energy. The cleaning is relatively thorough and no large-scale fragments are formed, which makes it difficult to clean the fragments. The method has good adaptability to the lenses of patients in different situations, and does not require complex calculations of the accuracy of nucleus fragmentation (different lenses of patients in different situations). Moreover, the improvement of the suction head will be very small, and the cost can be controlled within an acceptable range, thereby solving the industry problems encountered in the current femtosecond laser cataract surgery.

[0038] It should be noted that the above five positions can be increased or decreased according to actual needs, and the positions can also be adjusted in sequence;

[0039] Preferably, a second reflector 53 is provided at the front end of the inner hole of the suction tip 5, the first reflector 51 reflects the direction of the femtosecond laser beam toward the second reflector 53, and the second reflector 53 reflects the direction of the femtosecond laser beam toward the suction gap 52; the purpose of adopting this design is to add a layer of core crushing operation, so that the core crushing can be more delicate in the narrow space of the inner hole of the suction tip, and the second reflector 53 is also used to prevent the suction gap 52 from being blocked; preferably, the second reflector 53 is a plane mirror and is fixedly arranged obliquely at the bend of the inner hole of the suction tip.

[0040] Preferably, the first reflector 51 is in the shape of a supporting triangle, and one of the right-angled sides closes the opening 50, the other right-angled side is close to the second reflector 53, and the hypotenuse is provided with a reflective coating; the lower end of the first reflector 51 and the inner wall of the inner hole form a suction gap 52; the structure is simple and the layout is reasonable, which can effectively reduce the production cost; preferably, the upper surface of the first reflector is lower than the edge of the opening, and the edge of the opening is provided with a conical surface, which is convenient for rapid alignment with the indicated intersection of the focus indication unit 6; in addition, the design of the suction gap 52 also makes it possible that the suction force at the suction gap is greater than the suction force at the front end opening of the suction head 5, that is, the main core crushing and debris suction site is transferred to the inside of the suction head, thereby reducing damage to the eyes; preferably, a cutting knife can also be arranged at the lower end of the first reflector 51 to assist in physical core crushing.

[0041] Preferably, the focus indication unit includes a bracket 9 for fixing multiple indication beam generators, and a manipulator 10 for adjusting the deflection and lifting of the bracket is provided on the support 1; when the femtosecond laser generator 2 moves, the deflection and lifting movement of the bracket 9 are adjusted by the manipulator 10 to quickly adjust the indication intersection position of the focus indication unit 6; the manipulator 10 can adopt the existing technology and will not be elaborated on.

[0042] A femtosecond laser cataract surgery instrument application method is applied to the femtosecond laser cataract surgery instrument as described above, such as Figure 4 See also Figure 3 , the method comprises the following steps:

[0043] S01: after the femtosecond laser generator completes the lens nucleus pre-chopping operation, the focus of the femtosecond laser generator moves to a first position close to the edge of the lens nucleus;

[0044] S02: insert the suction tube through the opening of the cornea and move it around the first position, sucking up the broken nucleus several times during the movement;

[0045] The lens fragments after pre-cleavage are sucked and moved to the focal position indicated by the opening and the focal indication unit. The femtosecond laser generator is controlled by the control unit to operate. The emitted laser beam is reflected by the first reflector to cleave the lens fragments sucked into the inner hole of the suction head. The cleaved materials are sucked away through the suction gap.

[0046] S03: The focus of the femtosecond laser generator is moved to a second position close to the edge of the lens nucleus, and the suction tube is moved with the second position as the center, and the above suction and fragmentation operation is repeated during the movement;

[0047] S04: the focus of the femtosecond laser generator is moved to a third position close to the edge of the lens nucleus, and the suction tube is moved with the third position as the center, and the above suction and fragmentation operation is repeated multiple times during the movement;

[0048] S05: the focus of the femtosecond laser generator is moved to a fourth position close to the center of the lens nucleus, and the suction tube is moved with the fourth position as the center, and the above suction and fragmentation operation is repeated during the movement;

[0049] S06: The focus of the femtosecond laser generator is moved to the fifth position close to the edge of the lens nucleus, and the suction tube is moved with the fifth position as the center. The above-mentioned suction and fragmentation operation is performed multiple times during the movement.

[0050] By applying the method of the present application, there is no need to apply ultrasonic energy, thus avoiding the damage caused by ultrasonic energy. The cleaning is relatively thorough and no large-scale fragments are formed that make the fragments difficult to clean. It has good adaptability to the lenses of patients in different conditions, does not require complex calculations of the accuracy of nucleus fragmentation (the lenses of patients in different conditions are different), and the improvement to the suction tip will be very small, and the cost can be controlled within an acceptable range, thereby solving the industry problems encountered in current femtosecond laser cataract surgery.

[0051] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A femtosecond laser cataract surgical instrument, comprising a support, on which a femtosecond laser generator is arranged, characterized in that: It also includes a straw, the tail end of which is provided with an operating handle and connected to a negative pressure generator, and the front end of the straw is provided with an arc-shaped suction head with an opening facing downward; an opening is provided on the upper surface of the suction head, and a first reflector is provided at the opening, the first reflector is used to reflect the femtosecond laser beam entering the opening into the inner hole of the suction head for core fragmentation, and at the same time, the lower end of the first reflector extends into the inner hole of the suction head and forms a suction gap with the inner wall of the inner hole; a focus indication unit indicating the current focus position of the femtosecond laser generator is provided on the support, and the focus indication unit includes a plurality of indicator beam generators obliquely downward, and the intersection of the beams emitted by the plurality of indicator beam generators is the focus of the femtosecond laser generator; a control unit for controlling the operation of the femtosecond laser generator and the negative pressure generator is provided on the operating handle; a second reflector is provided at the front end of the inner hole of the suction head, the first reflector reflects the femtosecond laser beam in a direction toward the second reflector, and the second reflector reflects the femtosecond laser beam in a direction toward the suction gap.

2. The femtosecond laser cataract surgery instrument according to claim 1, characterized in that: The first reflector is in the shape of a supporting triangle, with one right-angled side closing the opening, the other right-angled side close to the second reflector, and the hypotenuse is provided with a reflective coating; the lower end of the first reflector and the inner wall of the inner hole form the suction gap.

3. The femtosecond laser cataract surgery instrument according to claim 2, characterized in that: The second reflector is a plane mirror and is fixedly arranged obliquely at the bend of the inner hole of the suction head.

4. The femtosecond laser cataract surgery instrument according to claim 2, characterized in that: An upper surface of the first reflector is lower than an edge of the opening.

5. The femtosecond laser cataract surgery instrument according to claim 4, characterized in that: The edge of the opening is provided with a tapered surface.

6. The femtosecond laser cataract surgery instrument according to claim 1, characterized in that: The focus indication unit comprises a bracket for fixing a plurality of indication light beam generators, and a manipulator for adjusting the deflection and lifting of the bracket is arranged on the bracket.

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