Femtosecond ophthalmologic operation device and method

Abstract

The invention discloses a femtosecond ophthalmologic operation device and method, and belongs to the technical field of medical treatment. The device comprises a lever supporting assembly, an eye scanning assembly, a counterweight adjusting assembly and a pressure sensing assembly, wherein the lever supporting assembly comprises a rotatable lever arm; the eye scanning assembly comprises a scanning head used for making contact with an eyeball, and the scanning head is connected with one end of a lever arm. The counterweight adjusting assembly is connected with the other end of the lever arm, and the counterweight adjusting assembly can change the pressing force of the scanning head relative to the eyeball by adjusting the torque; the pressure sensing assembly comprises a deformable pressure sensor, the two ends of the pressure sensor are connected with the other end of the lever arm and the rack respectively, and the pressure sensor and the balance weight adjusting assembly jointly act on the torque of one end of the lever arm and are used for balancing the torque of the eye scanning assembly and the eyeball jointly acting on one end of the lever arm. The pressure of the eye scanning assembly relative to the eyeball can be accurately adjusted.

Description

Technical Field

[0001] The present invention relates to the technical field of medical field, and in particular to a femtosecond ophthalmic surgery device and method. Background Art

[0002] Lasers were invented in the 1960s. With its strong directivity, high brightness, and good monochromaticity, lasers have developed rapidly in the fields of industry, agriculture, medicine, national defense, and scientific research. In the 1990s, a new type of ultrashort and ultrafast laser, femtosecond laser, began to appear and was applied in various fields. Its pulse width is compressed to the femtosecond level, 1 femtosecond is equal to one quadrillionth of a second (1×10-1 5 seconds). Such fast pulsed lasers have the advantages of higher peak power density, extremely small heat-affected zone, and accurate ablation threshold in the fields of micro-processing in industry and medicine, which has led to its faster development.

[0003] In recent years, femtosecond laser technology has been introduced into the field of medical ophthalmology. Its application principle is to utilize its extremely short pulse width and smaller light pulse energy to obtain extremely high peak power and extremely strong focusing ability, which can complete precise cutting in biological tissues.

[0004] During femtosecond surgery, the scanning lens needs to be pressed on the eyeball to perform surgery. However, the pressure of the scanning lens on the eyeball directly determines the success and quality of the surgery. Existing surgical equipment cannot effectively control the pressure of the scanning lens relative to the eyeball, resulting in uncertainty in the surgical effect. Summary of the invention

[0005] In view of this, it is necessary to provide a femtosecond ophthalmic surgical device to solve the problem that the surgical equipment is difficult to effectively control the pressure of the scanning lens relative to the eyeball.

[0006] In a first aspect, the present invention provides a femtosecond ophthalmic surgical device, comprising:

[0007] a lever support assembly, the lever support assembly comprising a rotatable lever arm;

[0008] an eye scanning assembly, the eye scanning assembly comprising a scanning head for contacting an eyeball, the scanning head being connected to one end of the lever arm;

[0009] A counterweight adjustment component, the counterweight adjustment component is connected to the other end of the lever arm, and the counterweight adjustment component can change the pressing force of the scanning head relative to the eyeball by adjusting the torque;

[0010] A pressure sensing assembly, the pressure sensing assembly comprising a deformable pressure sensor, the two ends of the pressure sensor being respectively connected to the other end of the lever arm and the frame;

[0011] The pressure sensor and the counterweight adjustment assembly jointly act on the torque at one end of the lever arm, so as to balance the torque jointly acted on the one end of the lever arm by the eye scanning assembly and the eyeball.

[0012] Furthermore, the counterweight adjustment assembly includes a fixed counterweight block and a movable counterweight block, wherein the fixed counterweight block is fixedly connected to the other end of the lever arm; the movable counterweight block is movably connected to the other end of the lever arm, and the movable counterweight block can adjust the pressure of the scanning head relative to the eyeball by changing the distance relative to the scanning head.

[0013] Furthermore, the counterweight adjustment assembly also includes an adjustment unit, which is connected to the lever arm and arranged parallel to the lever arm, and the movable counterweight block is movably connected to the adjustment unit, and the adjustment unit can drive the movable counterweight block to move along the length direction of the lever arm.

[0014] Furthermore, the counterweight adjustment assembly includes a fixed counterweight block and a counterweight body with variable weight, the fixed counterweight block is fixedly connected to the other end of the lever arm; the counterweight body is fixedly connected to the other end of the lever arm, and the counterweight body can adjust the pressure of the scanning head relative to the eyeball by changing its own weight.

[0015] Furthermore, the counterweight adjustment assembly includes a fluid delivery unit, which is connected to the counterweight body through a pipeline, and the fluid delivery unit can change the weight of the counterweight body by increasing or decreasing the amount of fluid in the counterweight body.

[0016] Furthermore, it also includes a moving component, which includes a movable frame, a hinged part and a connecting part, the hinged part and the connecting part are connected to the frame, the lever arm is hinged to the hinged part to form a lever fulcrum, and the two ends of the pressure sensor are respectively connected to the connecting part and the other end of the lever arm.

[0017] Furthermore, the lever arm forms a first force arm between the scanning head and the lever fulcrum, and the lever arm forms a second force arm between the counterweight adjustment assembly and the lever fulcrum, and the length of the first force arm is greater than the length of the second force arm.

[0018] Furthermore, it also includes a control component, which is electrically connected to the pressure sensor and the moving component respectively. The control component triggered by the pressure sensor can control the moving component to drive the lever support component away from the human body.

[0019] Furthermore, the pressure sensor is an electronic elastic force gauge.

[0020] In a second aspect, the present invention provides a femtosecond ophthalmic surgery method, which uses the femtosecond ophthalmic surgery device described above, and comprises the following steps:

[0021] S1: Self-checking and leveling. The scanning head, the weight adjustment component and the pressure sensor component act on the two ends of the lever arm respectively to keep the lever arm balanced. The pressure sensor can detect the balance state of the lever arm.

[0022] S2: Eyeball focusing, move the lever arm so that the scanning head is aimed at the eyeball and contacts the eyeball;

[0023] S3: counterweight adjustment, by fine-tuning the counterweight adjustment assembly, the moment of the lever arm away from one end of the scanning head can be changed, thereby changing the pressure of the scanning head relative to the eyeball;

[0024] S4: Precise cutting: Under appropriate pressure, the femtosecond laser device performs precise laser cutting or repair in the target area to complete the eye surgery.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] A femtosecond ophthalmic surgical device of the present invention comprises: a lever support assembly, an eye scanning assembly, a counterweight adjustment assembly and a pressure sensing assembly. The eye scanning assembly, the counterweight adjustment assembly and the pressure sensing assembly are respectively arranged at two ends of the lever support assembly. The eye scanning assembly directly abuts against the eyeball. By changing the torque of the counterweight adjustment assembly relative to the lever arm, the abutment pressure of the eye scanning assembly relative to the eyeball can be changed, thereby achieving precise control of the abutment pressure and improving the quality of surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 It is a structural schematic diagram of the regulating unit in the present invention;

[0030] Figure 3 It is a structural schematic diagram of the counterweight body in the present invention.

[0031] Figure 4 It is a flowchart of a femtosecond ophthalmic surgery method in the present invention.

[0032] In the figure, 100, lever support assembly; 110, lever arm;

[0033] 200, eye scanning component; 210, scanning head;

[0034] 300, counterweight adjustment assembly; 310, fixed counterweight block; 320, movable counterweight block; 330, adjustment unit; 340, counterweight body;

[0035] 400, pressure sensing component; 410, pressure sensor;

[0036] 500, moving component; 510, hinged portion; 520, connecting portion. DETAILED DESCRIPTION

[0037] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0038] A femtosecond ophthalmic surgical device in this embodiment relates to the technical field of medical field. The pressure of the scanning lens on the eyeball is adjusted by the lever principle. The adjustment accuracy is large and the operation is simple, which can greatly improve the quality of the surgery.

[0039] See also Figures 1 to 4 A femtosecond ophthalmic surgical device in this embodiment includes: a lever support assembly 100, an eye scanning assembly 200, a weight adjustment assembly 300 and a pressure sensing assembly 400. The eye scanning assembly 200, the weight adjustment assembly 300 and the pressure sensing assembly 400 are respectively arranged at both ends of the lever support assembly 100. The eye scanning assembly 200 directly contacts the eyeball. By changing the torque of the weight adjustment assembly 300 relative to the lever arm 110, the pressure of the eye scanning assembly 200 relative to the eyeball can be changed, thereby achieving precise control of the pressure against the ground and improving the quality of the surgery.

[0040] The lever support assembly 100 includes a rotatable lever arm 110 , which complies with the lever principle and always maintains a balanced state.

[0041] The eye scanning assembly 200 includes a scanning head 210 for contacting the eyeball. The scanning head 210 is connected to one end of the lever arm 110 . The scanning head 210 is subjected to the reaction force F1 from the eyeball and its own weight G1 , forming a torque M1 at one end of the lever arm 110 .

[0042] The counterweight adjustment assembly 300 is connected to the other end of the lever arm 110. The counterweight adjustment assembly 300 is subjected to its own weight, and forms a moment M2 at the other end of the lever arm 110. The counterweight adjustment assembly 300 can change M1 by changing the magnitude of the moment M2. Under the premise that G1 remains unchanged, the reaction force F1 will change with the change of M2.

[0043] The pressure sensing assembly 400 includes a deformable pressure sensor 410, and both ends of the pressure sensor 410 are respectively connected to the other end of the lever arm 110 and the frame. The other end of the lever arm 110 is acted upon by a force F3 of the pressure sensor 410, forming a torque M3. The torque M3 and the torque M2 act together on the other end of the lever arm 110, and M1 acts on the opposite end of the lever arm 110. The three interact with each other to maintain balance.

[0044] M1=(G1-F1)*L1, L1 is the torque and remains unchanged.

[0045] M3=F3*L3, L3 is the torque and remains unchanged.

[0046] In a femtosecond ophthalmic surgical device, when in standby mode, the lever arm 110 is horizontally arranged and keeps balance, and M1=M2+M3.

[0047] In a femtosecond ophthalmic surgical device, when in working state, the lever arm 110 is horizontally arranged and kept balanced.

[0048] When adjusting M2 to increase, The pressure on the eyeball is reduced.

[0049] When adjusting M2 to decrease, Increased pressure on the eyeball.

[0050] When M2 remains unchanged and the human eye is overactive, causing F1 to change, The indication F3 of the pressure sensor 410 will have to change accordingly, indicating and alerting the doctor and the system.

[0051] In some embodiments, see Figure 1 and Figure 2 The weight adjustment assembly 300 includes a fixed weight block 310 and a movable weight block 320. The fixed weight block 310 is fixedly connected to the other end of the lever arm 110, and the weight of the fixed weight block 310 is G2 and remains unchanged. The movable weight block 320 is movably connected to the other end of the lever arm 110, and the weight of the movable weight block 320 is G3 and remains unchanged. The movable weight block 320 can change M2 by changing the distance relative to the scanning head 210, thereby achieving the purpose of changing M3, and then adjusting the pressure of the scanning head 210 relative to the eyeball.

[0052] M2=G2*L2+G3*Lx, L2 is a torque and remains unchanged, and the movable counterweight block 320 can move relative to the lever arm 110, thereby changing the torque Lx, thereby achieving the purpose of changing the size of M2.

[0053] In a further embodiment, the counterweight adjustment assembly 300 also includes an adjustment unit 330, which is connected to the lever arm 110 and is arranged parallel to the lever arm 110. The movable counterweight block 320 is movably connected to the adjustment unit 330. The movable counterweight block 320 can change the distance from the fulcrum by moving on the lever arm 110. According to the principle of the lever, the farther the counterweight block is from the fulcrum, the greater the torque generated. Therefore, by changing the position of the movable counterweight block 320, the force applied to the scanning head 210 can be flexibly controlled, thereby accurately adjusting the pressure of the scanning head 210 against the eyeball. By using the movable counterweight block 320 to adjust the pressure, there is no need for an additional complex electronic control system to adjust the applied pressure in real time. Accurate pressure control effect can be achieved only through simple mechanical displacement adjustment.

[0054] As one implementation, see Figure 2 The adjustment unit 330 is a screw-nut adjustment mechanism, which includes a screw and a nut slider. The movable counterweight 320 is fixedly connected to the nut slider. The screw is arranged along the length direction of the lever arm 110. Both ends of the screw are connected to the lever arm 110 through a bracket. The servo motor is connected to the screw. The rotation of the screw can push the movable counterweight 320 to move along the lever arm 110 and change the force arm Lx.

[0055] As one embodiment, the adjustment unit 330 is a gear rack mechanism, the rack is connected to the lever arm 110 through a slot, the rack is arranged along the lever arm 110, the gear is rotatably connected to the lever arm 110, and the rack is meshed with the gear. The movable counterweight 320 is fixedly connected to the rack, and the servo motor can drive the gear to rotate, thereby pushing the movable counterweight 320 to move along the lever arm 110 to change the force arm Lx.

[0056] As one embodiment, the adjustment unit 330 is a belt transmission mechanism, which is connected to the lever arm 110. The movable counterweight 320 is connected to the transmission belt of the belt transmission mechanism. The transmission belt rotates relative to each other, which can drive the movable counterweight 320 to move along the lever arm 110 and change the force arm Lx.

[0057] As one embodiment, the adjustment unit 330 is a linear motor, the frame of the linear motor is connected to the lever arm 110, and the movable counterweight block 320 is connected to the slider of the linear motor. The linear motor can drive the slider and the movable counterweight block 320 to move along the lever arm 110 to change the force arm Lx.

[0058] In some embodiments, the counterweight adjustment assembly 300 includes a fixed counterweight block 310 and a counterweight body 340 with variable weight. The fixed counterweight block 310 is fixedly connected to the other end of the lever arm 110, and the counterweight body 340 is fixedly connected to the other end of the lever arm 110. The weight of the fixed counterweight block 310 is G2 and remains unchanged. The weight of the counterweight body 340 is Gx, and the weight of Gx can be adjusted according to actual needs.

[0059] The torque M2=G2*L2+Gx*L4, L2 and L4 are both fixed lengths and remain unchanged. The size of M2 can change with the change of Gx, so as to achieve the purpose of changing M3, and then adjust the pressure of the scanning head 210 relative to the eyeball.

[0060] As a further implementation, see Figure 3 The counterweight adjustment assembly 300 includes a fluid delivery unit, which includes a pump body and a pipeline. The counterweight body 340 is a hollow container. The counterweight body 340 is fixedly connected to the lever arm 110. The pump body is connected to the interior of the counterweight body 340 through a pipeline. The pump body can input or output liquid into or out of the counterweight body 340 to change the weight of the counterweight body 340, thereby changing M2.

[0061] In some embodiments, a femtosecond ophthalmic surgical device further includes a moving assembly 500, which includes a movable frame, which is connected to a multi-axis robotic arm, and the multi-axis robotic arm can perform multi-axis movement on the frame. The hinge 510 and the connecting portion 520 are connected to the frame, and the lever arm 110 is hinged to the hinge 510 to form a lever fulcrum, and the lever arm 110 can rotate around the lever fulcrum, so that the lever arm 110 conforms to the lever principle. The two ends of the pressure sensor 410 are respectively connected to the connecting portion 520 and the other end of the lever arm 110, and the connecting portion 520 can provide a support portion for the lever arm 110 to assist the lever arm 110 in maintaining balance.

[0062] In some embodiments, see Figure 1 The lever arm 110 forms a first force arm between the scanning head 210 and the lever fulcrum, and the lever arm 110 forms a second force arm between the counterweight adjustment component 300 and the lever fulcrum. The length of the first force arm is greater than the length of the second force arm.

[0063] According to the lever principle, the longer the lever arm, the smaller the force acting on the other side. Since the first lever arm is longer than the second lever arm, when the torque changes, the first lever arm is longer and the force change is smaller, which can more accurately adjust the pressure on the eyeball and improve the sensitivity and accuracy of the adjustment.

[0064] In some embodiments, a femtosecond ophthalmic surgical device also includes a moving component 500 and a control component, which are electrically connected to the pressure sensor 410 and the moving component 500, respectively. The control component can be triggered after the pressure sensor 410 changes, and the control component can control the moving component 500 to drive the lever support component 100 away from the human body.

[0065] With the help of the pressure sensor 410, the system can sense the pressure applied to the eyeball in real time. When the pressure sensor 410 detects that it exceeds the preset safety range, the control component will immediately trigger the moving component 500 to move the lever support component 100 away from the human body to prevent excessive pressure from causing damage to the eyeball tissue. This automatic adjustment mechanism can significantly improve the safety of the surgical process and prevent accidents.

[0066] Traditional surgical devices rely on manual adjustment by doctors, which results in certain delays and errors. The automated response of the mobile component 500 and the control component can be adjusted faster and more accurately than manual operation, thus avoiding surgical risks caused by untimely human response.

[0067] If during the operation, due to misoperation or accidental excessive pressure on the device, the control system can automatically adjust the position of the device to keep it away from the eyeball to avoid damage to the fragile eyeball tissue or surrounding tissue. This can reduce the risk of complications and ensure the smooth progress of the operation.

[0068] In some embodiments, the pressure sensor 410 is an electronic elastic force gauge. The electronic elastic force gauge can provide extremely high-precision pressure measurement and can accurately sense the slight pressure changes applied to the eyeball. For femtosecond laser surgery, the eyeball is a very fragile and sensitive tissue, and slight pressure changes will have a significant impact on the surgical effect. The use of an electronic elastic force gauge can ensure accurate control of pressure during surgery, reduce errors, and avoid eyeball damage caused by excessive or insufficient pressure.

[0069] In addition, during the measurement process, the electronic elastic force gauge can deform within a certain limit to adapt to the torque change of the lever arm 110.

[0070] See also Figure 4 , a femtosecond ophthalmic surgery scanning method, comprising the following steps:

[0071] Self-checking and leveling: The pressure sensor 410 monitors the balance state of the lever arm 110 to ensure that the scanning head 210, the weight adjustment assembly 300, the pressure sensor 410 and other components are in a balanced state before the operation. The device is in an ideal working state before the operation, avoiding the initial error caused by the imbalance of the equipment and improving the stability and accuracy of the operation.

[0072] Eyeball focusing: By moving the lever arm 110 to accurately align the scanning head 210 with the eyeball and contact the surface of the eyeball, the device can quickly and accurately locate the surgical site, reducing the complex operation of adjusting the eyeball position, improving surgical efficiency and accuracy, while reducing the patient's operation time and reducing the difficulty of the surgical operation.

[0073] Counterweight adjustment: By changing the torque of the end of the lever arm 110 away from the scanning head 210, precise control of the pressure on the scanning head 210 is achieved. The counterweight adjustment assembly 300 allows the pressure applied to the eyeball to be precisely changed through subtle adjustments, avoiding damage to the eyeball due to excessive or insufficient pressure, enhancing the flexibility and accuracy of the device in applying force to the eyeball during surgery, and ensuring the safety of the surgery.

[0074] Precise cutting: Under appropriate pressure, the femtosecond laser device can perform precise laser cutting or repair in the target area, especially in corneal surgery, the device can ensure that the depth and range of laser cutting of tissues are precisely controlled. By maintaining appropriate contact pressure, the system can prevent the problem of inconsistent cutting depth due to pressure changes, thereby improving the accuracy and effect of the surgery.

[0075] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed in the present invention should be covered by the present invention.

Claims

1. A femtosecond ophthalmic surgical device, characterized in that: include: a lever support assembly, the lever support assembly comprising a rotatable lever arm; an eye scanning assembly, the eye scanning assembly comprising a scanning head for contacting an eyeball, the scanning head being connected to one end of the lever arm; A counterweight adjustment component, the counterweight adjustment component is connected to the other end of the lever arm, and the counterweight adjustment component can change the pressing force of the scanning head relative to the eyeball by adjusting the torque; A pressure sensing assembly, the pressure sensing assembly comprising a deformable pressure sensor, the two ends of the pressure sensor being respectively connected to the other end of the lever arm and the frame; The pressure sensor and the counterweight adjustment assembly jointly act on the torque at one end of the lever arm, so as to balance the torque jointly acted on the one end of the lever arm by the eye scanning assembly and the eyeball.

2. A femtosecond ophthalmic surgical device according to claim 1, characterized in that: The counterweight adjustment assembly includes a fixed counterweight block and a movable counterweight block, wherein the fixed counterweight block is fixedly connected to the other end of the lever arm; the movable counterweight block is movably connected to the other end of the lever arm, and the movable counterweight block can adjust the pressure of the scanning head relative to the eyeball by changing the distance relative to the scanning head.

3. A femtosecond ophthalmic surgical device according to claim 2, characterized in that: The counterweight adjustment assembly also includes an adjustment unit, which is connected to the lever arm and arranged parallel to the lever arm. The movable counterweight block is movably connected to the adjustment unit, and the adjustment unit can drive the movable counterweight block to move along the length direction of the lever arm.

4. The femtosecond ophthalmic surgical device according to claim 1, characterized in that: The counterweight adjustment assembly includes a fixed counterweight block and a counterweight body with variable weight, wherein the fixed counterweight block is fixedly connected to the other end of the lever arm; the counterweight body is fixedly connected to the other end of the lever arm, and the counterweight body can adjust the pressure of the scanning head relative to the eyeball by changing its own weight.

5. A femtosecond ophthalmic surgical device according to claim 4, characterized in that: The counterweight adjustment assembly includes a fluid delivery unit, which is connected to the counterweight body through a pipeline. The fluid delivery unit can change the weight of the counterweight body by increasing or decreasing the amount of fluid in the counterweight body.

6. The femtosecond ophthalmic surgical device according to claim 1, characterized in that: It also includes a moving component, which includes a movable frame, a hinged portion and a connecting portion, the hinged portion and the connecting portion are connected to the frame, the lever arm is hinged to the hinged portion to form a lever fulcrum, and the two ends of the pressure sensor are respectively connected to the connecting portion and the other end of the lever arm.

7. A femtosecond ophthalmic surgical device according to claim 6, characterized in that: The lever arm forms a first force arm between the scanning head and the lever fulcrum, and the lever arm forms a second force arm between the counterweight adjustment component and the lever fulcrum. The length of the first force arm is greater than the length of the second force arm.

8. The femtosecond ophthalmic surgical device according to claim 7, characterized in that: It also includes a control component, which is electrically connected to the pressure sensor and the moving component respectively. The control component triggered by the pressure sensor can control the moving component to drive the lever support component away from the human body.

9. The femtosecond ophthalmic surgical device according to claim 1, characterized in that: The pressure sensor is an electronic elastic force gauge.

10. A femtosecond ophthalmic surgery scanning method, characterized in that: A femtosecond ophthalmic surgical device according to any one of claims 1 to 9 is used, comprising the following steps: S1: Self-checking and leveling. The scanning head, the weight adjustment component and the pressure sensor component act on the two ends of the lever arm respectively to keep the lever arm balanced. The pressure sensor can detect the balance state of the lever arm. S2: Eyeball focusing, move the lever arm so that the scanning head is aimed at the eyeball and contacts the eyeball; S3: counterweight adjustment, by fine-tuning the counterweight adjustment assembly, the moment of the lever arm away from one end of the scanning head can be changed, thereby changing the pressure of the scanning head relative to the eyeball; S4: Precise cutting: Under appropriate pressure, the femtosecond laser device performs precise laser cutting or repair in the target area to complete the eye surgery.

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