Ophthalmologic operation cutting probe

Abstract

The invention provides an ophthalmologic operation cutting probe, and relates to the technical field of medical instruments. The ophthalmologic operation cutting probe comprises a cutting inner tube, a cutting outer tube, a linear driving part, a cutting base and a mounting base, the cutting base is mounted on the mounting base, and the linear driving piece is arranged in the mounting base; the linear driving piece comprises a magnet yoke, a permanent magnet, a driving base, a driving coil and a flexible supporting piece, the magnet yoke is arranged in the mounting base, the permanent magnet is arranged on the inner wall of the magnet yoke, the driving base is inserted into the permanent magnet, the driving coil is wound on the driving base, and the flexible supporting piece is arranged at the end, protruding out of the magnet yoke, of the driving base; the end, away from the driving base, of the flexible supporting piece is connected with the mounting base. The cutting outer pipe is fixedly inserted into the end, away from the mounting base, of the cutting base, one end of the cutting inner pipe is inserted into the cutting outer pipe, and the other end of the cutting inner pipe is in transmission connection with the driving base. The technical effect of improving the cutting effect is achieved.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically, to an ophthalmic surgical cutting probe. Background Technology

[0002] Microsurgery typically utilizes optical magnification equipment and microsurgical instruments to perform delicate procedures, cutting or removing tissues from various locations. For example, minimally invasive ophthalmic surgery involves cutting and removing tissues such as the lens, cortex, vitreous fragments, vitreous fluid, and detached retina. Vitrectomy is currently the most effective method for complex posterior segment surgeries (such as vitreous hemorrhage, vitreous opacity, retinal detachment, and macular holes). Vitreous fluid is a transparent, viscoelastic, filamentous material that fills the posterior segment of the eye and adheres to the retina. Extreme care must be taken during cutting and removal to avoid traction on the retina, which could lead to tears or detachment.

[0003] Current cutting probes are all gas-driven (such as compressed air or nitrogen), commonly using a single-path principle where gas pushes the diaphragm forward and a spring mechanically pushes it backward; or a dual-path principle where gas pushes the diaphragm forward and backward separately. Gas-driven principles require hospitals to have a compressed air system or nitrogen cylinders. The gas-driven diaphragm stops by impacting the front and rear walls, generating significant noise and vibration, affecting the surgical environment and intraoperative handheld precision. Furthermore, current cutting probes are all in open-loop control mode, meaning that the gas-driven diaphragm reciprocates, causing the inner cutting tube to perform a guillotine-like reciprocating cutting motion within the outer cutting tube. The direction of gas exchange is controlled by a high-speed solenoid valve within the main unit. This high-speed solenoid valve opens and closes by using magnetic attraction when energized and a spring pushing it back when de-energized. The time difference between the electromagnetic response and the spring mechanical response creates the concept of duty cycle (the ratio of the solenoid valve's opening and closing to the entire cycle). When the duty cycle control of the high-speed solenoid valve is asymmetrical (not meeting 50 / 50), it will affect the movement stroke of the inner cutting tube at the distal end of the cutting probe within the outer cutting tube. If the movement stroke is insufficient, that is, the inner and outer cutting tubes cannot produce effective cutting (like the two blades of scissors not closing, with no shearing effect), there may be a scenario where the probe only aspirates without cutting, which can easily cause intraocular traction and, in severe cases, damage intraocular tissues. Summary of the Invention

[0004] The purpose of this invention is to provide an ophthalmic surgical cutting probe to alleviate the technical problem of poor cutting effect in the prior art.

[0005] In a first aspect, embodiments of the present invention provide an ophthalmic surgical cutting probe, including an inner cutting tube, an outer cutting tube, a linear drive, a cutting base, and a mounting base; The cutting base is mounted on the mounting base, and the linear drive component is disposed inside the mounting base; The linear drive member includes a yoke, a permanent magnet, a drive base, a drive coil, and a flexible support member. The yoke is disposed within the mounting base, the permanent magnet is disposed on the inner wall of the yoke, the drive base is inserted into the permanent magnet, the drive coil is wound around the drive base, the flexible support member is disposed at one end of the drive base protruding from the yoke, and the end of the flexible support member away from the drive base is connected to the mounting base; The cutting outer tube is fixedly inserted at one end of the cutting base away from the mounting base, and one end of the cutting inner tube is inserted into the cutting outer tube, and the other end is in transmission connection with the drive base.

[0006] Combined with the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect. Wherein, a central support shaft is provided in the middle of the yoke, and the drive base is sleeved on the central support shaft.

[0007] Combined with the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect. Wherein, the longitudinal section of the yoke is in a mountain shape.

[0008] Combined with the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect. Wherein, the ophthalmic surgical cutting probe further includes a drive shaft for connecting the cutting inner tube, and an installation channel is formed on the drive base, that the drive shaft is inserted into the installation channel; One end of the drive shaft is provided with a connection seat for connecting the cutting inner tube.

[0009] Combined with the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect. Wherein, a magnetic conduction seat is installed at the end of the drive base, the flexible support member is located between the magnetic conduction seat and the yoke, and an excitation coil is wound around the magnetic conduction seat; The installation channel is formed on the magnetic conduction seat, and there is a gap between the drive shaft and the installation channel.

[0010] Combined with the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect. Wherein, a magnetic isolation pad is provided between the magnetic conduction seat and the drive base.

[0011] Combined with the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect. Wherein, a first support seat for supporting the drive shaft is provided on the cutting base, and a sealing ring is provided between the drive shaft and the first support seat.

[0012] In conjunction with the first aspect, the present invention provides one possible implementation of the first aspect, wherein the aforementioned mounting channel extends through the drive base and the magnetic yoke, the mounting base is provided with a second support for supporting the drive shaft, and a sealing ring is provided between the drive shaft and the second support.

[0013] In conjunction with the first aspect, the present invention provides a possible implementation of the first aspect, wherein the drive shaft has a suction channel, the second support is connected to a suction pipe, and the suction pipe communicates with the suction channel.

[0014] In conjunction with the first aspect, the present invention provides a possible implementation of the first aspect, wherein the mounting base is provided with a position sensor for detecting the position of the drive base.

[0015] Beneficial effects: This invention provides an ophthalmic surgical cutting probe, including an inner cutting tube, an outer cutting tube, a linear drive, a cutting base, and a mounting base. The cutting base is mounted on the mounting base, and the linear drive is disposed within the mounting base. The linear drive includes a magnetic yoke, a permanent magnet, a drive base, a drive coil, and a flexible support. The magnetic yoke is disposed within the mounting base, the permanent magnet is disposed on the inner wall of the magnetic yoke, the drive base is inserted into the permanent magnet, the drive coil is wound around the drive base, and the flexible support is disposed at one end of the drive base protruding from the magnetic yoke. The end of the flexible support away from the drive base is connected to the mounting base. The outer cutting tube is fixedly inserted at the end of the cutting base away from the mounting base, one end of the inner cutting tube is inserted into the outer cutting tube, and the other end is connected to the drive base for transmission.

[0016] Specifically, during use, the drive coil is energized, allowing the drive base and the drive coil to move axially relative to the permanent magnet. The drive base drives the inner cutting tube to reciprocate within the outer cutting tube, thus performing tissue cutting. Simultaneously, adjusting the current in the drive coil adjusts the moving distance of the inner cutting tube, ensuring effective cutting force for both the inner and outer cutting tubes. Furthermore, by energizing the drive coil, the drive base drives the inner cutting tube to move smoothly and steadily, without abnormal vibration or noise, and without affecting the surgical environment or intraoperative handheld precision. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 A schematic diagram of an ophthalmic surgical cutting probe provided in an embodiment of the present invention; Figure 2 This is a first-direction cross-sectional view of an ophthalmic surgical cutting probe provided in an embodiment of the present invention; Figure 3 for Figure 2 A magnified view of a section at point A in the middle; Figure 4 This is a second-direction cross-sectional view of an ophthalmic surgical cutting probe provided in an embodiment of the present invention.

[0019] icon: 100 - Cut the inner tube; 200 - Cut outer tube; 300-Linear drive component; 310-Magnetic yoke; 311-Central support shaft; 320-Permanent magnet; 330-Drive base; 340-Drive coil; 350-Flexible support component; 360-Drive shaft; 361-Suction channel; 370-Mounting channel; 380-Connecting seat; 400 - Cutting base; 410 - First support base; 500 - Mounting base; 510 - Second support base; 610 - Magnetic base; 620 - Excitation coil; 630 - Magnetic shielding pad; 700 - Suction tubing; 800 - Position sensor. Detailed Implementation

[0020] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0025] See Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this embodiment provides an ophthalmic surgical cutting probe, including an inner cutting tube 100, an outer cutting tube 200, a linear drive 300, a cutting base 400, and a mounting base 500; the cutting base 400 is mounted on the mounting base 500, and the linear drive 300 is disposed within the mounting base 500; the linear drive 300 includes a magnetic yoke 310, a permanent magnet 320, a drive base 330, a drive coil 340, and a flexible support 350, the magnetic yoke 310 being disposed within the mounting base 500, and the permanent magnet 320 being disposed within the mounting base 500. On the inner wall of the magnetic yoke 310, the drive base 330 is inserted into the permanent magnet 320, the drive coil 340 is wound around the drive base 330, and the flexible support 350 is set at one end of the drive base 330 that protrudes from the magnetic yoke 310. The end of the flexible support 350 away from the drive base 330 is connected to the mounting base 500. The cutting outer tube 200 is fixedly inserted into the end of the cutting base 400 away from the mounting base 500, one end of the cutting inner tube 100 is inserted into the cutting outer tube 200, and the other end is connected to the drive base 330 for transmission.

[0026] Specifically, during use, the drive coil 340 is energized, allowing the drive base 330 and the drive coil 340 to move axially relative to the permanent magnet 320. The drive base 330 drives the inner cutting tube 100 to reciprocate within the outer cutting tube 200, thereby performing tissue cutting. Simultaneously, adjusting the current in the drive coil 340 adjusts the moving distance of the inner cutting tube 100, ensuring effective cutting force between the inner cutting tube 100 and the outer cutting tube 200. Furthermore, energizing the drive coil 340 causes the drive base 330 to drive the inner cutting tube 100 to move smoothly and steadily, without abnormal vibration or noise, and without affecting the surgical environment or intraoperative handheld precision.

[0027] The permanent magnet 320 is fixed by the yoke 310, which can reduce magnetic leakage. The drive base 330 is wound with a drive coil 340. When the drive coil 340 is energized, the drive base 330 and the drive coil 340 can move along the axial direction of the mounting base 500, thereby driving the inner tube 100 to move along its own axial direction, so that the cutting edge at the front end of the inner tube 100 and the cutting edge of the outer tube 200 cooperate to complete the cutting operation.

[0028] It should be noted that the cutting base 400 is detachably mounted on the mounting base 500. A slot is provided at one end of the mounting base 500, into which the cutting base 400 can be inserted. A sealing ring is provided between the cutting base 400 and the mounting base 500. With this design, the cutting base 400, the inner cutting tube 100, and the outer cutting tube 200 can be made disposable, which facilitates disassembly and avoids cross-contamination.

[0029] The outer cutting tube 200 is fixedly inserted into the front end of the cutting base 400, and the outer end of the cutting base 400 is detachably inserted into the mounting base 500. The inner cutting tube 100 is inserted into the outer cutting tube 200 and passes through the cutting base 400. A sealing ring is provided between the inner cutting tube 100 and the cutting base 400.

[0030] The flexible support 350 can be made of flexible materials, such as silicone rubber, fluororubber and other polymer materials, or it can be made of high fatigue resistance metal wire, such as titanium alloy, piano wire, nickel titanium alloy and so on.

[0031] See Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in an optional embodiment, a central support shaft 311 is provided in the middle of the magnetic yoke 310, and the drive base 330 is loosely fitted on the central support shaft 311.

[0032] Specifically, a central support shaft 311 is provided in the middle of the yoke 310. The drive base 330 is sleeved on the central support shaft 311. Through the setting of the central support shaft 311, the magnetic field uniformity is further improved, enabling the drive base 330 to move smoothly and preventing the drive base 330 from moving erratically.

[0033] Among them, the longitudinal section of the yoke 310 is mountain-shaped.

[0034] See Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown in

[0035] Specifically, an installation channel 370 is provided on the drive base 330, and the drive shaft 360 is inserted into the installation channel 370. The drive shaft 360 can be fixedly inserted into the installation channel 370. When the drive base 330 moves, it can带动 the drive shaft 360 to move synchronously, so that the drive shaft 360带动 the cutting inner tube 100 to move through the connecting seat 380.

[0036] See Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown in

[0037] Specifically, a magnetic guide seat 610 is installed at the end of the drive base 330. The flexible support member 350 is located between the magnetic guide seat 610 and the yoke 310. An exciting coil 620 is wound around the magnetic guide seat 610; an installation channel 370 is provided on the magnetic guide seat 610, and there is a gap between the drive shaft 360 and the installation channel 370.

[0038] Among them, after the exciting coil 620 is powered on, the magnetic guide seat 610 can adsorb the drive shaft 360. At this time, the cutting inner tube 100 can perform cutting operations. When the exciting coil 620 is powered off, the magnetic guide seat 610 cannot adsorb the drive shaft 360. At this time, the movement of the drive base 330 will not带动 the cutting inner tube 100 to move.

[0039] A magnetic shielding pad 630 is provided between the magnetic conductor base 610 and the drive base 330. The magnetic shielding pad 630 is provided to prevent the excitation coil 620 from affecting the drive base 330.

[0040] It should be noted that when the magnetic base 610 is used, there is a gap between the drive shaft 360 and the mounting channel 370. The drive shaft 360 is movably inserted into the mounting channel 370. That is, when the excitation coil 620 is not energized, the drive base 330 and the magnetic base 610 cannot drive the drive shaft 360 to move synchronously when they move synchronously. When the excitation coil 620 on the magnetic base 610 is energized, the drive base 330 and the magnetic base 610 can drive the drive shaft 360 to move synchronously when they move synchronously.

[0041] See Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in an optional embodiment, the cutting base 400 is provided with a first support 410 for supporting the drive shaft 360, and a sealing ring is provided between the drive shaft 360 and the first support 410.

[0042] Specifically, when there is a gap between the drive shaft 360 and the mounting channel 370, a first support 410 for supporting the drive shaft 360 is provided on the cutting base 400. A sealing ring is provided between the first support 410 and the drive shaft 360. When the drive base 330 drives the drive shaft 360 to move, the drive shaft 360 needs to overcome the friction between itself and the sealing ring.

[0043] To facilitate the connection between the drive shaft 360 and the cutting inner tube 100, the first support 410 and the cutting base 400 are both configured as separate structures.

[0044] See Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in the optional embodiment, the installation channel 370 passes through the drive base 330 and the magnetic yoke 310. The installation base 500 is provided with a second support seat 510 for supporting the drive shaft 360, and a sealing ring is provided between the drive shaft 360 and the second support seat 510.

[0045] Specifically, when there is a gap between the drive shaft 360 and the mounting channel 370, the mounting channel 370 can pass through the drive base 330 and the magnetic yoke 310, so that the end of the drive shaft 360 away from the cutting inner tube 100 can be inserted into the second support 510 at the tail end of the mounting base 500. A sealing ring is provided between the drive shaft 360 and the second support 510. When the drive base 330 drives the drive shaft 360 to move, the drive shaft 360 needs to overcome the friction between itself and the sealing ring.

[0046] See Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in the optional embodiment, the drive shaft 360 has a suction channel 361, and the second support 510 is connected to a suction pipe 700, which is connected to the suction channel 361.

[0047] Specifically, the drive shaft 360 has a hollow structure, and a suction channel 361 is formed inside the drive shaft 360. The suction channel 361 can communicate with the inside of the cutting inner tube 100. A suction pipe 700 is connected to the second support 510, and the suction pipe 700 is connected to the suction channel 361. With this setting, the external negative pressure equipment can establish a negative pressure environment inside the cutting inner tube 100, so as to realize the work of simultaneous suction and cutting.

[0048] See Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in an optional embodiment, a position sensor 800 for detecting the position of the drive base 330 is provided inside the mounting base 500.

[0049] Specifically, a position sensor 800 is installed inside the mounting base 500. When the drive base 330 moves back and forth, the position sensor 800 can detect the position change of the drive base 330, thereby forming a closed-loop control.

[0050] In addition, a magnetic base 610 is provided at the front end of the drive base 330, and the position sensor 800 can also indirectly detect the position of the drive base 330 by detecting the position of the magnetic base 610.

[0051] It should be noted that the ophthalmic surgical cutting probe provided in this embodiment is electromagnetically driven, eliminating the need for a hospital's compressed air system or nitrogen cylinders, thus reducing the hardware requirements for surgery, making it easy to carry, and suitable for use in remote areas and regions with limited medical resources. Furthermore, the alternating positive and negative current signals passing through the drive coil 340 generate magnetic force, which interacts with the permanent magnet 320 to cause the drive base 330 to reciprocate. Without a physical collision limiting structure, this reduces noise generation and handle vibration, making the surgeon's grip more stable and reliable.

[0052] In addition, the ophthalmic surgical cutting probe provided in this embodiment has a position sensor 800, which can obtain the movement stroke of the drive shaft 360 in real time, realize closed-loop control of the reciprocating motion stroke, thereby ensuring that each reciprocating motion of the cutting inner tube 100 can produce an effective cutting effect, improve control stability, and reduce surgical risks.

[0053] It should also be noted that the cutting base 400, inner cutting tube 100, and outer cutting tube 200 are separate from the mounting base 500. The inner cutting tube 100 and outer cutting tube 200 are in direct contact with the human eye and are single-use parts. The drive structure inside the mounting base 500 is reusable, thereby reducing the generation of plastic medical waste, making it more low-carbon and environmentally friendly, and significantly reducing the manufacturing cost of the cutting probe, making it more accessible to all.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An ophthalmic surgical cutting probe, characterized in that, Comprising: A cutting inner tube (100), a cutting outer tube (200), a linear drive (300), a cutting base (400) and a mounting base (500); The cutting base (400) is mounted on the mounting base (500), and the linear drive (300) is arranged within the mounting base (500); The linear drive (300) includes a yoke (310), a permanent magnet (320), a drive base (330), a drive coil (340) and a flexible support (350). The yoke (310) is arranged within the mounting base (500), the permanent magnet (320) is arranged on the inner wall of the yoke (310), the drive base (330) is inserted into the permanent magnet (320), the drive coil (340) is wound around the drive base (330), the flexible support (350) is arranged at one end of the drive base (330) protruding from the yoke (310), and the end of the flexible support (350) away from the drive base (330) is connected to the mounting base (500); The cutting outer tube (200) is fixedly inserted at one end of the cutting base (400) away from the mounting base (500), and one end of the cutting inner tube (100) is inserted into the cutting outer tube (200), and the other end is in transmission connection with the drive base (330).

2. The ophthalmic surgical cutting probe according to claim 1, characterized in that, A central support shaft (311) is provided in the middle of the yoke (310), and the drive base (330) is sleeved on the central support shaft (311) loosely.

3. The ophthalmic surgical cutting probe according to claim 2, characterized in that, The longitudinal section of the yoke (310) is in a mountain shape.

4. The ophthalmic surgical cutting probe according to claim 1, characterized in that, It further includes a drive shaft (360) for connecting the cutting inner tube (100). An installation channel (370) is formed on the drive base (330), and the drive shaft (360) is inserted into the installation channel (370); One end of the drive shaft (360) is provided with a connecting seat (380) for connecting the cutting inner tube (100).

5. The ophthalmic surgical cutting probe according to claim 4, characterized in that, A magnetic conduction seat (610) is mounted at the end of the drive base (330). The flexible support (350) is located between the magnetic conduction seat (610) and the yoke (310), and an exciting coil (620) is wound around the magnetic conduction seat (610); The installation channel (370) is formed on the magnetic conduction seat (610), and there is a gap between the drive shaft (360) and the installation channel (370).

6. The ophthalmic surgical cutting probe according to claim 5, characterized in that, A magnetic isolation pad (630) is provided between the magnetic conduction seat (610) and the drive base (330).

7. The ophthalmic surgical cutting probe according to claim 5, characterized in that, A first support seat (410) for supporting the drive shaft (360) is provided on the cutting base (400), and a sealing ring is provided between the drive shaft (360) and the first support seat (410).

8. The ophthalmic surgical cutting probe according to claim 5, characterized in that, The mounting channel (370) passes through the drive base (330) and the magnetic yoke (310). The mounting base (500) is provided with a second support seat (510) for supporting the drive shaft (360). A sealing ring is provided between the drive shaft (360) and the second support seat (510).

9. The ophthalmic surgical cutting probe according to claim 8, characterized in that, The drive shaft (360) has a suction channel (361) inside, and a suction pipe (700) is connected to the second support (510), and the suction pipe (700) is connected to the suction channel (361).

10. The ophthalmic surgical cutting probe according to claim 1, characterized in that, The mounting base (500) is equipped with a position sensor (800) for detecting the position of the drive base (330).

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