Cutting handle and vitrectomy equipment

Abstract

The invention provides a cutting handle and vitrectomy equipment, and relates to the technical field of medical instruments.The cutting handle comprises a holding part, an outer needle, an inner needle and a driving unit, and the outer needle is connected to the far end of the holding part; a notch is formed in the side wall of the outer needle; the inner needle is positioned inside the outer needle; a cutter is arranged on the side wall of the far end of the inner needle; and the driving unit is located in the holding part, is connected with the near end of the inner needle and is used for driving the inner needle to rotate, so that a cutting action is formed when the cutter passes through the incision. Different from front-back reciprocating motion in the prior art, the rotary cutting scheme is adopted in the scheme, the high-speed rotary motion (clockwise or anticlockwise) direction is a single direction, and energy loss generated in the reciprocating motion process of starting, stopping and restarting of a moving part is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a cutting handle and a vitrectomy device. Background Art

[0002] Microsurgery usually uses optical magnification equipment and microsurgical instruments to perform delicate operations to cut or remove tissues in different parts. For example, in minimally invasive ophthalmic surgery, tissues such as the lens, cortex, broken nucleus, vitreous humor, and detached retina are cut and removed. Vitrectomy is currently the most effective method for complex posterior segment surgeries (such as vitreous hemorrhage, vitreous opacities, retinal detachment, macular holes, etc.). The vitreous humor is a transparent, viscoelastic, filamentous material that fills the posterior segment of the eye and is attached to the retina. During the cutting and removal process, great care must be taken to avoid pulling on the retina and causing damage such as holes and detachment.

[0003] The vitrectomy handle used in existing vitrectomies is generally pneumatically reciprocatingly driven, with a pneumatic diaphragm dividing the internal space of the handle to form two front and rear chambers. The air guide channel is also located inside the handle. The diseased tissue is cut by alternately ventilating the two chambers to drive the inner and outer cutting needles to move relative to each other. At the same time, a Venturi pump or peristaltic pump is used to suction and remove diseased tissue debris.

[0004] The main disadvantages of existing handles are: the current handles all adopt a guillotine-type reciprocating cutting form, which requires alternately inflating the front and rear sides of the pneumatic diaphragm to push the diaphragm forward and backward. The pneumatic diaphragm has movement steps such as starting, moving, stopping, reverse starting, reverse movement, and reverse stopping. This will consume too much energy to maintain high-frequency reciprocating motion. Summary of the invention

[0005] The object of the present invention is to provide a cutting handle and a vitrectomy device to alleviate the technical problem of high energy consumption in the cutting action of the existing cutting devices.

[0006] In a first aspect, the present invention provides a cutting handle, comprising:

[0007] Grip part;

[0008] An outer needle, the outer needle being connected to the distal end of the gripping portion; a side wall of the outer needle having a cutout;

[0009] An inner needle, the inner needle being located inside the outer needle; a cutter being arranged on a distal side wall of the inner needle;

[0010] A driving unit is located in the holding portion and is connected to the proximal end of the inner needle, and is used to drive the inner needle to rotate so that the cutter forms a cutting action when passing through the incision.

[0011] Furthermore, the grip portion has a first chamber, an air inlet channel and an air outlet channel inside, the inlet of the air inlet channel is connected to the outside, the outlet of the air inlet channel is connected to the first chamber, the inlet of the air outlet channel is connected to the first chamber, and the outlet of the air outlet channel is connected to the outside;

[0012] The driving unit comprises:

[0013] A driving shaft, the driving shaft is connected to the proximal end of the inner needle, and the two are coaxially arranged;

[0014] A rotating impeller is connected to the driving shaft and is located in the first chamber. The gas flowing through the air inlet channel, the first chamber and the air outlet channel in sequence can drive the rotating impeller to rotate.

[0015] Furthermore, the gripping portion is provided with:

[0016] Two rotary bearings are located on both sides of the rotary impeller axially, and the driving shaft is connected to the rotary bearings.

[0017] Furthermore, the gripping portion is provided with:

[0018] A second chamber, the second chamber is located in front of the first chamber; the gap between the outer wall of the inner needle and the inner wall of the outer needle forms a flow guide channel; and / or a flow guide channel connected to the outer wall of the inner needle is provided inside the inner needle; the flow guide channel is connected to the second chamber;

[0019] a suction channel, wherein an inlet of the suction channel is in communication with the second chamber, and an outlet of the suction channel is in communication with the outside;

[0020] A centrifugal impeller is arranged inside the second chamber. The centrifugal impeller is connected to the driving shaft and the two are coaxial. The rotating centrifugal impeller is used to guide the fluid from the guide channel to the suction channel.

[0021] Furthermore, a third chamber is provided inside the gripping portion, a tachometer is connected to the driving shaft, and the tachometer is located in the third chamber; and a reflective structure is provided on the tachometer.

[0022] The third chamber is provided with an optical signal emitting unit and an optical signal receiving unit both facing the tachometer. The optical signal emitting unit can generate an optical signal. The counting is completed by monitoring the optical signal received by the optical signal receiving unit which is periodically reflected by the rotating reflective structure.

[0023] Furthermore, a flow regulating mechanism is provided on the gripping portion, and the flow regulating mechanism is used to regulate the flow of the suction channel.

[0024] Furthermore, the flow regulating mechanism includes:

[0025] a valve body, the valve body being located in the suction passage;

[0026] A control part, wherein a part of the control part is located outside the gripping part and a part of the control part is connected to the valve body, and the valve body is driven to move relative to the suction channel through the gripping part to change the effective flow cross-sectional area of ​​the suction channel.

[0027] Furthermore, the gripping portion comprises a rear shell and a middle portion connected in sequence, the proximal end of the middle portion has a rear groove, and the rear shell blocks the rear groove;

[0028] The rear groove has a support sleeve inside, and the outer wall of the support sleeve is sealed and connected to the inner wall of the rear groove; the axial gap between the support sleeve and the distal end surface of the rear groove forms the first chamber;

[0029] The proximal end surface of the support sleeve is provided with a receiving groove; a sealing cover is provided inside the middle part, and the sealing cover blocks the opening of the receiving groove from the proximal end, and the sealing cover and the receiving groove form a third chamber.

[0030] In a second aspect, the present invention provides a vitrectomy device comprising the above-mentioned cutting handle.

[0031] Further, including:

[0032] A control unit, the control unit comprising:

[0033] An air intake interface, the air intake interface is communicated with the air intake channel;

[0034] An air outlet interface, the air outlet interface is communicated with the air outlet channel;

[0035] A liquid circuit interface, the liquid circuit interface being in communication with the suction channel;

[0036] A circuit interface is electrically connected to the optical signal transmitting unit and the optical signal receiving unit.

[0037] The present invention has at least the following advantages or beneficial effects:

[0038] The cutting handle provided by the present invention comprises: a gripping portion, an outer needle, an inner needle and a driving unit, wherein the outer needle is connected to the distal end of the gripping portion; a cut is provided on the side wall of the outer needle; the inner needle is located inside the outer needle; a cutter is provided on the distal side wall of the inner needle; the driving unit is located inside the gripping portion, and the driving unit is connected to the proximal end of the inner needle, and is used to drive the inner needle to rotate, so that the cutter forms a cutting action when passing through the cut.

[0039] Different from the back-and-forth reciprocating motion in the prior art, the rotary cutting scheme adopted in this scheme has a high-speed rotary motion (clockwise or counterclockwise) in a single direction, avoiding the energy loss caused by the reciprocating motion process of the moving parts starting-stopping-restarting. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0041] Figure 1 A schematic diagram of a cutting handle provided by an embodiment of the present invention;

[0042] Figure 2 for Figure 1 Sectional view along the A-A direction;

[0043] Figure 3 for Figure 2 A partial enlarged view of position B in the middle;

[0044] Figure 4 for Figure 2 A partial enlarged view of the C position in the middle;

[0045] Figure 5 for Figure 2 A partial enlarged view of the D position in the middle;

[0046] Figure 6 A schematic diagram of a rotating impeller of a cutting handle provided in an embodiment of the present invention;

[0047] Figure 7 A schematic diagram of a centrifugal impeller of a cutting handle provided in an embodiment of the present invention;

[0048] Figure 8 A schematic diagram of an inner needle of a cutting handle provided in an embodiment of the present invention;

[0049] Fig. 9 A schematic diagram of a vitrectomy apparatus provided for an embodiment of the present invention.

[0050] icon:

[0051] 10 - cutting handle; 11 - rear shell; 12 - middle part; 13 - front shell; 14 - front pressure cover; 15 - first sealing material; 16 - first chamber; 17 - second chamber; 18 - third chamber;

[0052] 20 - control unit; 21 - frame; 22 - adjustment knob; 23 - display screen; 24 - air inlet interface; 25 - air outlet interface; 26 - circuit interface; 27 - liquid circuit interface;

[0053] 31 - first air pipe; 32 - second air pipe; 33 - electric cable; 34 - liquid pipe;

[0054] 100 - drive unit; 101 - drive shaft; 102 - rotating impeller; 103 - rotating bearing; 104 - support sleeve; 105 - first seal; 106 - second seal; 107 - air inlet channel; 108 - air outlet channel; 113 - air outlet; 114 - air inlet; 121 - first shaft groove; 122 - impeller base; 123 - fan blade structure;

[0055] 201 - centrifugal impeller; 202 - suction channel; 211 - side retaining ring; 212 - centrifugal blade; 213 - second shaft groove;

[0056] 301 - tachometer; 302 - cover; 303 - optical signal transmitting unit; 304 - optical signal receiving unit;

[0057] 401 - outer needle; 402 - inner needle; 4021 - thread; 403 - cutter; 404 - third sealing element;

[0058] 501 - regulating knob; 502 - rotating shaft; 503 - fourth sealing member; 504 - fifth sealing member; 505 - valve body. DETAILED DESCRIPTION

[0059] 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.

[0060] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0061] 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.

[0062] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting 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.

[0063] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0064] 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 or an electrical connection; it can be a direct connection, or it can be indirectly connected 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.

[0065] The cutting handle 10 provided by the present invention is used for cutting and aspirating intraocular vitreous body, membrane, blood and lens.

[0066] The specific structure includes:

[0067] like Figure 1 As shown, the grip portion is the part that the user holds with the palm of his hand when using.

[0068] like Figure 5 As shown, the distal end of the gripping portion is fixedly connected to an outer needle 401, and the outer needle 401 is tubular; the side wall of the outer needle 401 has an incision; the inner needle 402 is located inside the outer needle 401, and the inner needle 402 can rotate relative to the outer needle 401, and a cutter 403 is provided on the distal side wall of the inner needle 402, and the cutter 403 cooperates with the incision to cut the tissue structure.

[0069] like Figure 2As shown, the cutting handle 10 includes a driving unit 100, the driving unit 100 is located in the gripping portion, and the driving unit 100 is connected to the proximal end of the inner needle 402, and is used to drive the inner needle 402 to rotate, so that the cutter 403 forms a cutting action when passing through the incision. The driving unit 100 can be electric or pneumatic. In this embodiment, the driving unit 100 is pneumatic. It should be noted that the proximal end mentioned in this article is the end close to the user, and the distal end is the end close to the patient.

[0070] Different from the back-and-forth reciprocating motion in the prior art, the rotary cutting scheme adopted in this scheme has a high-speed rotary motion (clockwise or counterclockwise) in a single direction, avoiding the energy loss caused by the reciprocating motion process of the moving parts starting-stopping-restarting.

[0071] In the prior art, usually the inner and outer cutting needles are composed of two metal circular tubes of different sizes. The distal end of the metal tube is laser cut and capped to form two notches at the distal end of the metal tube to simulate a blade. Under the condition that the outer needle 401 remains stationary, the inner needle 402 moves back and forth in a straight line, so that the notches of the two move in a "guillotine" manner to cut the intraocular tissue. The metal tube is usually made of stable metal materials such as stainless steel, nickel-titanium alloy, etc. that are biocompatible. In this embodiment, the inner needle 402 is in the form of a solid metal rod or a braided tube. Compared with the existing inner needle 402 that constructs a diversion channel through the hollow structure of the inner needle 402, in this solution, Figure 5 As shown, constructing a flow guide channel with the gap between the inner diameter of the outer needle 401 and the outer diameter of the inner needle 402 can increase the flow cross-sectional area, thereby improving the suction efficiency.

[0072] The distal end of the inner needle 402 is connected to the cutter 403 by welding, riveting or bonding, and the proximal end is also fixed to the drive shaft 101 by welding, mortise and tenon, snap-fit ​​or threading. When the drive shaft 101 rotates at high speed, the rotational torque is transmitted to the distal cutter 403, driving the cutter 403 to perform high-speed rotary cutting motion (10W-20WRPM), thereby realizing the cutting function of the intraocular tissue.

[0073] like Figure 1 As shown, the gripping portion includes a rear shell 11, a middle portion 12 and a front shell 13 connected in sequence, the proximal end and the distal end of the middle portion 12 respectively have a rear groove and a front groove, and the rear shell 11 blocks the rear groove. Figure 3 As shown, a first chamber 16 is formed between the support sleeve 104 in the rear groove and the rear groove. Figure 2 As shown, the distal end opening of the front groove is blocked by a front gland 14, and a first sealing material 15 is provided between the front gland 14 and the side wall of the front groove. The front shell 13 is buckled and covered on the outer side of the front gland 14.

[0074] like Figure 3As shown, the drive unit 100 is located inside the middle part 12 of the handle, the rear groove of the middle part 12 and the rear shell 11 form a cavity, the first chamber 16 is separated in the cavity by the support sleeve 104, and then the third chamber 18 is formed by the assembly groove on the support sleeve 104 and the cover 302; the front groove of the middle part 12 and the front shell 13 form a cavity, and the cavity has a front gland 14 for blocking the front groove. After the front gland 14 blocks the front groove, a second chamber 17 is formed in the front groove. The center of the middle part 12 is penetrated by a drive shaft 101, and the rotary impeller 102 in the drive unit 100 is installed on the drive shaft 101. The rotary impeller 102 is located in the first chamber 16, and is supported by rotary bearings 103 on both sides. The rotary bearing 103 at the far end is installed on the middle part 12, and a second seal 106 is located at the far end to form a sealing structure to prevent gas from leaking to the far second chamber 17. The proximal rotating bearing 103 is installed on the support sleeve 104. The support sleeve 104 has an annular groove structure at the distal end, and a first sealing member 105 is installed inside. Figure 2 As shown, the compressed air (nitrogen or other inert gas) in the system passes through the air inlet 114 on the rear shell 11 of the grip portion, passes through the air inlet channel 107, and blows toward the rotating impeller 102 from a direction perpendicular to the drive shaft 101, driving the rotating impeller 102 to rotate at a high speed, with a speed of up to 100.000-200.000RPM (Revolutions Per Minute). Then, the gas passes through the gap of the proximal rotating bearing 103 in a direction parallel to the drive shaft 101, and is discharged from the handle through the air outlet channel 108, the inclined hole on the cover 302, and the air outlet 113.

[0075] like Figure 6 As shown, the rotating impeller 102 includes an impeller base 122, a blade structure 123 and a first shaft groove 121. The rotating impeller 102 is an open structure on both sides, and the drive shaft 101 passes through the impeller base 122. The blade structure 123 is blown by the gas in the vertical direction to rotate at a high speed. The first shaft groove 121 is used to fit with the protruding structure on the drive shaft 101, so that the two rotate together.

[0076] In order to reduce the friction resistance and heat generated during high-speed rotation, the rotating impeller 102 can be made of ceramic material to improve wear resistance and heat dissipation capacity. It can also be made of fluorinated plastic materials such as PTFE to improve its own self-lubricating properties to reduce resistance and friction. The fan blade structure 123 has a certain rotation angle and can realize the functions of forward and reverse rotation, thereby preventing the cutting tube from being blocked.

[0077] like Figure 3As shown, the gripping portion is provided with: a second chamber 17 and a suction channel 202, and the second chamber 17 is located at the distal end of the first chamber 16. In this embodiment, the gap between the outer wall of the inner needle 402 and the inner wall of the outer needle 401 forms a guide channel, and the guide channel is connected to the second chamber 17. In another feasible scheme, the inner needle 402 is provided with a guide channel connected to the outer wall of the inner needle 402. In this scheme, the distal outer wall of the inner needle 402 has an inlet connected to the guide channel, and the cut tissue enters the guide channel inside the inner needle 402 from the incision of the outer needle 401; in another feasible scheme, the above two situations can be met at the same time, that is, there is a gap between the inner needle 402 and the outer needle 401 to form a guide channel, and the inner needle 402 also has a guide channel, and the cut tissue can flow into the second chamber 17 from the two guide channels.

[0078] The inlet of the suction channel 202 is connected to the second chamber 17, and the outlet of the suction channel 202 is connected to the outside through an interface; a centrifugal impeller 201 is arranged inside the second chamber 17, and the centrifugal impeller 201 is connected to the driving shaft 101, and the two are coaxial, and the rotating centrifugal impeller 201 is used to guide the fluid from the guide channel to the suction channel 202.

[0079] In this embodiment, the suction action is achieved by the centrifugal impeller 201 inside the handle, rather than relying on the pump body outside the handle. Specifically, the rotating impeller 102 drives the centrifugal impeller 201 while rotating at high speed. The rotation direction of the blades on the centrifugal impeller 201 is opposite to the rotation direction of the blade structure 123 of the rotating impeller 102, which plays a role in balancing and reducing vibration. In combination with the unidirectional rotation movement, it can effectively reduce noise. And, as Figure 8 As shown, the outer wall of the inner needle 402 has a thread 4021 that spirals along its length, and the rotating inner needle 402 can guide the liquid to the proximal side. Compared with the current mainstream suction form through an external Venturi pump or a peristaltic pump, the high-speed rotary cutting handle has a built-in high-speed suction impeller, which is equivalent to building a centrifugal pump into the handle, which can greatly improve the suction efficiency. At the same time, the suction centrifugal pump is located inside the handle, closer to the working target position (the patient's eyes), and is equipped with a flow rate control mechanism, which can make feedback adjustments more quickly, making the suction flow characteristics more stable, reducing the fluid fluctuations (pulsation) generated during the suction process, and enhancing safety performance.

[0080] like Figure 7As shown, the centrifugal impeller 201 includes a side retaining ring 211, centrifugal blades 212 and a second shaft groove 213. The second shaft groove 213 is used to fit with the protrusion on the drive shaft 101. The centrifugal blades 212 rotate as the drive shaft 101 rotates at high speed. The centrifugal blades 212 generate a high centrifugal force under high-speed rotation, so that the whole realizes the function of a centrifugal pump, thereby realizing the high-speed suction function of the intraocular fluid (perfusion fluid, vitreous body, etc.).

[0081] It should be noted that the rotation direction of the centrifugal blades 212 is opposite to the rotation direction of the blade structure 123 of the rotating impeller 102, which can play a balancing role during the rotation process and reduce the vibration and noise of the overall rotation motion.

[0082] The centrifugal impeller 201 is a semi-closed structure as a whole, and the side retaining ring 211 is installed at the proximal end of the rotary cutting handle to prevent the backflow of the liquid and guide the liquid into the suction channel 202.

[0083] The material of the centrifugal impeller 201 can be high-strength, wear-resistant, self-lubricating plastics such as PTFE, POM, PeeK, etc., and ceramics, aluminum alloys, etc., which have good heat dissipation performance and are wear-resistant can also be selected. When the centrifugal impeller 201 is sucking intraocular fluid (vitreous body, perfusion fluid, physiological saline, etc.), the high-speed flowing liquid can take away the heat generated by the centrifugal impeller 201, playing a cooling role.

[0084] like Figure 4 As shown, a third chamber 18 is provided inside the gripping portion, a tachometer 301 is connected to the driving shaft 101, and the tachometer 301 is located in the third chamber 18; the surface of the tachometer 301 can be a continuous and non-reflective dark surface, and the reflective structure can include two symmetrical reflecting surfaces arranged at 180° positions on both sides of the tachometer 301; an optical signal emitting unit 303 and an optical signal receiving unit 304 are provided inside the third chamber 18, both facing the tachometer 301, and the optical signal emitting unit 303 can generate an optical signal, and when the optical signal is irradiated to the dark surface of the tachometer 301, no signal is returned; when the optical signal is irradiated to the reflective surface of the tachometer 301, a reflected signal is generated and received by the optical signal receiving unit 304.

[0085] The tachometer 301 is installed at the proximal end of the drive shaft 101 and rotates together with the rotating impeller 102. The tachometer 301 includes a continuous non-reflective dark surface, and two symmetrical reflective surfaces are symmetrically arranged at 180° on both sides of the tachometer 301 for counting reflected light signals. Of course, the number of grids and angles of the reflective surfaces can be adjusted according to the specific optical fiber position. The optical signal transmitting unit 303 and the optical signal receiving unit 304 can both be optical fiber cables 33, and the two optical fiber cables 33 form a cable 33, and the cable 33 is connected to the control unit 20 in the surgical device.

[0086] like Figure 4 As shown, the optical signal is injected into the tachometer 301 at the proximal end of the third chamber 18 through the optical fiber cable 33. The input signal is a continuous optical signal. When the optical signal is irradiated to the dark surface of the tachometer 301, no signal is returned. When the optical signal is irradiated to the reflective surface of the tachometer 301, a reflection signal is generated, and the reflection signal is a discontinuous pulse signal. When the tachometer 301 rotates one circle, two reflected pulse signals are generated. Based on this principle, the rotation speed of the current drive shaft 101 is counted. The feedback signal is transmitted back to the control unit 20 along the cable 33, thereby realizing the rotation speed monitoring and regulation of the rotary cutting handle.

[0087] The grip portion is provided with a flow regulating mechanism, and the flow regulating mechanism is used to regulate the flow of the suction channel 202 .

[0088] like Figure 4 As shown, specifically, the flow regulating mechanism includes: a valve body 505 and a control part, the valve body 505 is located in the suction channel 202, a part of the control part is located outside the gripping part, and a part is connected to the valve body 505, and the valve body 505 is driven by the gripping part to move relative to the suction channel 202 to change the effective flow cross-sectional area of ​​the suction channel 202.

[0089] Specifically, the valve body 505 may have a through hole, and the axial direction of the through hole is in the same plane as the axial direction of the suction channel 202; the valve body 505 may be driven to rotate by the grip portion to change the parallelism between the through hole and the suction channel 202. The control portion includes a control knob 501 and a rotating shaft 502, the control knob 501 is connected to the valve body 505 through the rotating shaft 502, and in order to avoid leakage, a fourth sealing member 503 is provided between the outer wall of the rotating shaft 502 and the hole wall of the middle part 12, and a fifth sealing member 504 is also provided between the valve body 505 and the inner wall of the suction channel 202, wherein the fourth sealing member 503 and the fifth sealing member 504 prevent liquid from leaking from the position of the control knob 501. The main function of the valve body 505 is to provide damping or throttling, and to achieve the regulation of the suction flow by changing the cross-sectional size of the suction channel 202. Common implementation methods include mechanical methods such as baffles, latches, ball valves, or electronic methods such as pressure and flow sensors. In this case, a mechanical ball valve is used as an example. The control knob 501 can be set to different gears, and the opening and closing stroke angle of the ball valve is controlled by switching between different gears. When the through hole is parallel to the suction channel 202, the flow of the handle is the largest; when the through hole is perpendicular to the suction channel 202, the flow of the handle is the smallest, which is 0. By controlling the different angles and positions of the valve body 505, the gear control of the suction flow can be achieved.

[0090] The front shell 13 has a through hole through which the outer needle 401 passes, and a third sealing member 404 is arranged in the hole and is arranged around the outer needle 401. The third sealing member 404 may be a sealing ring.

[0091] In summary, the high-speed rotary cutting handle 10 provided by the present invention achieves cutting of intraocular tissues through high-speed rotary motion, and has the following advantages:

[0092] 1. The rotation speed is 100.000-200.000RPM (Revolutions Per Minute). The higher cutting speed can reduce the traction on fragile tissues (such as retina) during the cutting process and has higher safety performance.

[0093] 2. The direction of high-speed rotation (clockwise or counterclockwise) is single direction, which avoids the energy loss caused by the reciprocating motion process of starting-stopping-restarting of moving parts.

[0094] 3. The rotating impeller 102 rotates at high speed while driving the centrifugal impeller 201. The rotation direction of the blades on the centrifugal impeller 201 is opposite to that of the blades on the driving impeller, which plays a role in balancing and reducing vibration. Combined with the unidirectional rotation movement, it can effectively reduce noise.

[0095] 4. Compared with the current mainstream suction form through external Venturi pump or peristaltic pump, the high-speed rotary cutting handle has a built-in high-speed suction impeller, which is equivalent to building a centrifugal pump into the handle, which can greatly improve the suction efficiency. At the same time, the suction centrifugal pump is located inside the handle, closer to the working target position (patient's eyes), and is equipped with a damping control unit, which can make feedback adjustments more quickly, making the suction flow characteristics more stable, reducing the fluid fluctuations (pulsation) generated during the suction process, and enhancing safety performance.

[0096] 5. Different from the existing method of constructing a liquid diversion channel with the inner hole of the inner needle 402, the present invention constructs a diversion channel with the cavity between the inner needle 402 and the outer needle 401, which has a higher cross-sectional area and can improve the suction efficiency.

[0097] The vitrectomy device provided by the present invention comprises the cutting handle 10 mentioned above.

[0098] like Fig. 9 As shown, the device includes a control unit 20, and the control unit 20 includes: an external frame 21, and an adjustment knob 22, a display screen 23, an air inlet interface 24, an air outlet interface 25, a circuit interface 26 and a liquid circuit interface 27 arranged on the external frame 21. The air inlet interface 24 is connected to the air inlet channel 107 through a tube body; the air outlet interface 25 is connected to the air outlet channel 108 through a tube body; the liquid circuit interface 27 is connected to the suction channel 202 tube body; the circuit interface 26 is connected to the optical signal transmitting unit 303 and the optical signal receiving unit 304 through a cable 33. The frame 21 contains electronic components such as a control circuit board, and an external gas source provides compressed air or nitrogen. At the same time, it is connected to the fluid control unit 20, which can realize the regulation of parameters such as pressure and flow of gas and liquid (not shown in the figure). The control unit 20 is connected to the handle through a first air pipe 31, a second air pipe 32, a liquid pipe 34 and a cable 33.

[0099] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements 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. A cutting handle, characterized in that: include: Grip part; An outer needle (401), the outer needle (401) being connected to the distal end of the gripping portion; a side wall of the outer needle (401) having a cutout; An inner needle (402), the inner needle (402) being located inside the outer needle (401); a cutter (403) being provided on a distal side wall of the inner needle (402); A driving unit (100), wherein the driving unit (100) is located in the holding portion and connected to the proximal end of the inner needle (402), and is used to drive the inner needle (402) to rotate so that the cutter (403) forms a cutting action when passing through the incision.

2. The cutting handle according to claim 1, characterized in that: The grip portion has a first chamber (16), an air inlet channel (107) and an air outlet channel (108) inside, the inlet of the air inlet channel (107) is connected to the outside, the outlet of the air inlet channel (107) is connected to the first chamber (16), the inlet of the air outlet channel (108) is connected to the first chamber (16), and the outlet of the air outlet channel (108) is connected to the outside; The driving unit (100) comprises: A driving shaft (101), the driving shaft (101) is connected to the proximal end of the inner needle (402), and the two are coaxially arranged; A rotating impeller (102), the rotating impeller (102) is connected to the driving shaft (101), and the rotating impeller (102) is located in the first chamber (16), and the gas flowing through the air inlet channel (107), the first chamber (16) and the air outlet channel (108) in sequence can drive the rotating impeller (102) to rotate.

3. The cutting handle according to claim 2, characterized in that: The gripping portion is internally provided with: Two rotary bearings (103) are located on both axial sides of the rotary impeller (102), and the drive shaft (101) is connected to the rotary bearings (103).

4. The cutting handle according to claim 3, characterized in that: The gripping portion is internally provided with: a second chamber (17), the second chamber (17) being located in front of the first chamber (16); a gap between the outer wall of the inner needle (402) and the inner wall of the outer needle (401) forming a flow guiding channel; and / or a flow guiding channel communicating with the outer wall of the inner needle (402) is provided inside the inner needle (402); the flow guiding channel is in communication with the second chamber (17); A suction channel (202), wherein the inlet of the suction channel (202) is in communication with the second chamber (17), and the outlet of the suction channel (202) is in communication with the outside; A centrifugal impeller (201) is arranged inside the second chamber (17); the centrifugal impeller (201) is connected to the drive shaft (101) and the two are coaxial; the rotating centrifugal impeller (201) is used to guide the fluid from the guide channel to the suction channel (202).

5. The cutting handle according to claim 4, characterized in that: A third chamber (18) is provided inside the grip portion, a tachometer (301) is connected to the drive shaft (101), and the tachometer (301) is located in the third chamber (18); the tachometer (301) has a reflective structure; The third chamber (18) is provided with a light signal emitting unit (303) and a light signal receiving unit (304) both facing the tachometer (301); the light signal emitting unit (303) is capable of generating a light signal, and counting is completed by monitoring the light signal periodically reflected by the rotating reflective structure and received by the light signal receiving unit (304).

6. The cutting handle according to claim 4, characterized in that: The gripping portion is provided with a flow regulating mechanism, and the flow regulating mechanism is used to regulate the flow of the suction channel (202).

7. The cutting handle according to claim 6, characterized in that: The flow regulating mechanism comprises: a valve body (505), the valve body (505) being located in the suction channel (202); A control part, a part of which is located outside the gripping part, and a part of which is connected to the valve body (505), and the valve body (505) is driven by the gripping part to move relative to the suction channel (202) to change the effective flow cross-sectional area of ​​the suction channel (202).

8. The cutting handle according to claim 5, characterized in that: The gripping portion comprises a rear shell (11) and a middle portion (12) which are connected in sequence, the proximal end of the middle portion (12) having a rear groove, and the rear shell (11) blocks the rear groove; A support sleeve (104) is provided inside the rear groove, and the outer wall of the support sleeve (104) is sealedly connected to the inner wall of the rear groove; the axial gap between the support sleeve (104) and the distal end surface of the rear groove forms the first chamber (16); The proximal end surface of the support sleeve (104) is provided with a receiving groove; a cover (302) is provided inside the middle part (12), and the cover (302) blocks the opening of the receiving groove from the proximal end, and the cover (302) and the receiving groove form a third chamber (18).

9. A vitrectomy device, characterized in that Comprising the cutting handle as described in claim 5.

10. The vitrectomy device of claim 9, wherein: include: A control unit (20), the control unit (20) comprising: An air intake interface (24), the air intake interface (24) being in communication with the air intake passage (107); An air outlet interface (25), the air outlet interface (25) being in communication with the air outlet channel (108); A liquid circuit interface (27), the liquid circuit interface (27) being in communication with the suction channel (202); A circuit interface (26), the circuit interface (26) being electrically connected to the optical signal transmitting unit (303) and the optical signal receiving unit (304).

Images