A disposable fluid cartridge assembly for an ophthalmic surgical system
Patent Information
- Application Number
- CN202611529585.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-09-30
- Publication Date
- 2026-11-03
AI Technical Summary
During phacoemulsification cataract surgery, the aspiration port of the emulsification needle is easily blocked by obstructions, causing a sudden release of negative pressure, resulting in a sharp drop in anterior chamber pressure and enophthalmos, which increases the difficulty of the operation and the operation time.
It adopts a disposable fluid box assembly and uses a purely mechanical differential pressure kinetic energy generation mechanism to drive the linkage rod. Through the change of negative pressure intensity in the negative pressure docking seat, the negative pressure suction flow rate and the liquid supply replenishment flow rate are synchronously adjusted. Combined with the two-stage displacement structure of slip ring and stress ball plate, the negative pressure and liquid supply pipeline are adjusted in linkage. LED warning and pressure relief button are set to deal with blockage.
Maintaining stable intraocular pressure prevents anterior chamber collapse, reduces operational difficulty and surgical risks, increases the probability of clearing stubborn blockages, and reduces costs and reliability issues.
Smart Images
Figure CN123023949A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of ophthalmic surgical tools, specifically a disposable fluid cartridge assembly for ophthalmic surgical systems. Background Technology
[0002] Phacoemulsification cataract surgery is currently the mainstream surgical method for treating cataracts. During the procedure, an irrigation system continuously infuses the anterior chamber of the eye with infusion fluid to maintain its fullness. Simultaneously, a negative pressure aspiration system removes the phacoemulsified lens nucleus and infusion fluid. Maintaining a balance between infusion and aspiration flow is crucial for stabilizing intraocular pressure and ensuring surgical safety. However, in actual surgery, the aspiration port of the phacoemulsification needle is easily blocked by obstructions such as lens nucleus. When the obstruction is suddenly aspirated and cleared under negative pressure, the accumulated negative pressure in the tubing is released instantaneously, causing a surge phenomenon with a large flow rate. This can lead to a sudden drop in anterior chamber pressure, enophthalmos, and in severe cases, damage to the corneal endothelium, posterior lens capsule, or suspensory ligaments. In addition, some stubborn obstructions are large enough to be aspirated into the aspiration port of the phacoemulsification needle, continuously blocking the port. This requires the surgeon to manually adjust the suction angle or use other instruments for removal, increasing the difficulty of the operation and the surgical time. Summary of the Invention
[0003] This application provides a disposable fluid cartridge assembly for ophthalmic surgical systems, the main purpose of which is to achieve flow balance between perfusion and aspiration, maintain stable intraocular pressure, and ensure surgical safety.
[0004] To achieve the above objectives, embodiments of this application provide a disposable fluid cartridge assembly for an ophthalmic surgical system, including a fluid cartridge and a holder disposed on the fluid cartridge. The holder is provided with a fluid supply circulation mechanism and a negative pressure suction mechanism. The fluid supply circulation mechanism is used to connect an external fluid supply source to the fluid supply interface of an emulsifying needle. The negative pressure suction mechanism is used to connect the suction interface of the emulsifying needle to a negative pressure source. The holder is also provided with a negative pressure docking seat, a linkage drive mechanism, a negative pressure path adjustment mechanism, and a fluid supply path adjustment mechanism. The negative pressure docking seat is connected to the negative pressure liquid suction mechanism. The negative pressure docking seat is provided with a differential pressure kinetic energy generating mechanism, which is used to generate a displacement driving force according to the negative pressure intensity in the negative pressure docking seat. The linkage drive mechanism includes a linkage rod, one end of which is connected to the differential pressure kinetic energy generating mechanism to move axially under the drive of the differential pressure kinetic energy generating mechanism; The negative pressure passage adjustment mechanism is connected in series in the pipeline of the negative pressure liquid suction mechanism and is driven by the linkage rod, and is used to adjust the flow area of the pipeline of the negative pressure liquid suction mechanism under the drive of the linkage rod. The liquid supply passage adjustment mechanism is connected in series in the pipeline of the liquid supply circulation mechanism and is driven by the linkage rod, and is used to adjust the flow area of the pipeline of the liquid supply circulation mechanism under the drive of the linkage rod. The negative pressure channel adjustment mechanism and the liquid supply channel adjustment mechanism are linked by the linkage rod to synchronize the negative pressure suction flow rate and the liquid supply replenishment flow rate.
[0005] In one feasible embodiment, the differential pressure kinetic energy generating mechanism includes an outer cylinder, a slip ring, a stress spherical plate, a stop frame, and a spring; the outer cylinder is fixed to the side wall of the negative pressure docking seat, and a damping communication hole is provided at the outer end of the outer cylinder, which connects the outside world with the inner cavity of the outer cylinder; the slip ring is slidably disposed in the inner cavity of the outer cylinder, and a stop frame for limiting the slip ring is also provided in the inner cavity of the outer cylinder; the stress spherical plate is disposed on the inner side of the slip ring, and the stress spherical plate protrudes away from the inner cavity of the negative pressure docking seat in its natural state, and can change its shape under the action of pressure difference; the spring is disposed in the outer cylinder and is used to provide a restoring elastic force to the slip ring; the end of the linkage rod is fixedly connected to the middle of the stress spherical plate.
[0006] In one feasible implementation, the linkage rod has a first-stage displacement and a second-stage displacement. In the first-stage displacement, the slip ring slides along the inner cavity of the outer cylinder toward the negative pressure docking seat, driving the linkage rod to move, thereby driving the negative pressure passage adjustment mechanism and the liquid supply passage adjustment mechanism to adjust the flow area of the pipeline. In the second-stage displacement, the stress spherical plate undergoes a shape change under the action of a continuously increasing pressure difference, changing from bulging outward to bulging inward, driving the linkage rod to continue moving, so that the negative pressure passage adjustment mechanism and the liquid supply passage adjustment mechanism completely block the corresponding pipeline.
[0007] In one feasible implementation, the linkage drive mechanism further includes an LED warning light, which is configured to cooperate with the linkage rod to be illuminated when the linkage rod reaches the trigger position of the second stage displacement.
[0008] In one feasible implementation, the negative pressure passage adjustment mechanism includes a negative pressure flow rate control unit, which includes a first intercepting end piece, a second intercepting end piece, and a first central rotating block. The first and second intercepting end pieces are respectively fixedly disposed at the two end interfaces of the negative pressure liquid suction mechanism pipeline, and the first central rotating block is rotatably disposed between the first and second intercepting end pieces. The first, second, and first central rotating blocks are respectively provided with a plurality of first arc-shaped through holes arranged in a circumferential direction. The outer wall of the first central rotating block is connected to a first driving member disposed on the linkage rod, so that the movement of the linkage rod drives the first central rotating block to rotate, thereby changing the overlapping area of the first arc-shaped through holes on the first central rotating block with the first arc-shaped through holes on the first and second intercepting end pieces.
[0009] In one feasible embodiment, the liquid supply passage adjustment mechanism includes a liquid supply flow rate control component, which includes an isolation frame, a liquid supply flow rate control unit, and a second driving member. The isolation frame is disposed in the pipeline of the liquid supply circulation mechanism, and the liquid supply flow rate control unit is disposed within the isolation frame. The liquid supply flow rate control unit includes a third intercepting end plate, a fourth intercepting end plate, and a second central rotating block. The third intercepting end plate, the fourth intercepting end plate, and the second central rotating block are respectively provided with a plurality of second arc-shaped through holes arranged in a circumferential direction. The second driving member is disposed at the end of the linkage rod, and the outer wall of the second central rotating block is connected to the second driving member for transmission, so that the movement of the linkage rod drives the second central rotating block to rotate, thereby changing the overlapping area of the second arc-shaped through holes.
[0010] In one feasible implementation, the linkage rod is connected to the corresponding central rotating block via a gear and rack transmission structure or a friction wheel transmission structure.
[0011] In one feasible implementation, the liquid supply circulation mechanism includes an external liquid supply inlet pipe and an emulsifying needle liquid supply pipe; the outer end of the external liquid supply inlet pipe is used to connect to an external liquid supply source, and the inner end of the external liquid supply inlet pipe is connected to the liquid supply path adjustment mechanism; one end of the emulsifying needle liquid supply pipe is connected to the liquid supply path adjustment mechanism, and the other end of the emulsifying needle liquid supply pipe is used to connect to the liquid supply interface of the emulsifying needle.
[0012] In one feasible implementation, the liquid supply channel regulating mechanism is further connected to a connecting pipe, and a valve is provided on the connecting pipe; the connecting pipe is used to replenish liquid to the pipeline of the negative pressure liquid suction mechanism in the suction-only working mode to prevent air from entering the pipeline; the valve is used to disconnect the connecting pipe in other working modes.
[0013] In one feasible implementation, the fluid box is provided with a pressure relief button and a drain plug; the pressure relief button is used to connect the inner cavity of the fluid box with the outside atmosphere under external force operation, so as to release pressure and reset the differential pressure kinetic energy generating mechanism; the drain plug is located at the bottom of the fluid box and is used to discharge waste liquid in the fluid box.
[0014] This application provides a disposable fluid cartridge assembly for ophthalmic surgical systems, which, compared with the prior art, has the following advantages: First, the present invention uses a purely mechanical differential pressure kinetic energy generating mechanism as the driving source. It directly drives the linkage rod to move by utilizing the change in negative pressure intensity in the negative pressure docking seat. It does not require active electronic components such as pressure sensors, controllers, and electric control valves. It has a simple structure, low cost, and high reliability. It is particularly suitable for disposable fluid box assemblies, avoiding the cost and reliability problems caused by integrating electronic components in disposable consumables. Secondly, the present invention connects the negative pressure passage adjustment mechanism and the liquid supply passage adjustment mechanism simultaneously through the linkage rod, so that the negative pressure suction flow rate and the liquid supply replenishment flow rate form a synchronous linkage relationship. When the blockage causes the negative pressure to rise, the linkage rod narrows the negative pressure passage and reduces the suction flow rate to prevent over-suction, while simultaneously reducing the perfusion flow rate of the liquid supply passage, so that the perfusion and suction are always matched, effectively maintaining the stability of intraocular pressure and avoiding anterior chamber collapse. Third, the differential pressure kinetic energy generating mechanism of the present invention is provided with a damping connecting hole. After the blockage is cleared by itself, due to the capillary damping effect, the reset process of the slip ring and the linkage rod is carried out slowly, and the negative pressure passage gradually restores the flow area, effectively avoiding the surge over-suction caused by the full opening of the negative pressure passage at the moment of clearing. Fourth, the differential pressure kinetic energy generating mechanism of the present invention adopts a two-stage displacement structure with a slip ring and a stress ball plate. In the first stage, the flow rate is adjusted by the movement of the slip ring to deal with ordinary blockages. In the second stage, the stress ball plate changes shape under continuous high pressure differential to completely block the pipeline and trigger an LED warning, so that the operator can identify stubborn blockages in time. After complete blockage, the blockage loses the negative pressure adsorption force and is in a free state, which is convenient for the operator to observe and handle. Fifth, the present invention is equipped with a pressure relief button on the fluid box. After confirming a stubborn blockage, the operator can operate the pressure relief button to connect the inner cavity of the fluid box with the atmosphere. After the pressure difference kinetic energy generating mechanism is depressurized and reset, the device automatically resumes perfusion and aspiration. Since the position and posture of the blockage change after losing adsorption, it can enter the aspiration port at different angles and shapes when adsorbed again. Thus, a second adsorption attempt on stubborn blockage can be achieved without additional instruments, which significantly improves the probability of clearing stubborn blockage and reduces the operator's operating burden and surgical risks. Attached Figure Description
[0015] Figure 1A three-dimensional structural schematic diagram of a disposable fluid cartridge assembly for an ophthalmic surgical system provided in an embodiment of this application is shown; Figure 2 This illustration shows a top view of a disposable fluid cartridge assembly for an ophthalmic surgical system provided in an embodiment of this application. Figure 3 A schematic diagram of the pressure relief button provided in an embodiment of this application is shown; Figure 4 A schematic diagram of the structure of the central support rod provided in an embodiment of this application is shown; Figure 5 A schematic diagram of the differential pressure kinetic energy generating mechanism provided in an embodiment of this application is shown; Figure 6 This paper shows a schematic diagram of the position of the linkage rod provided in an embodiment of this application; Figure 7 A schematic diagram of the flow rate control unit provided in an embodiment of this application is shown; Figure 8 A schematic diagram of the liquid supply flow rate control component provided in an embodiment of this application is shown; Figure 9 A schematic diagram of the flow rate control unit provided in an embodiment of this application is shown.
[0016] In the diagram: 10. Fluid box; 20. Card holder; 30. Liquid supply circulation mechanism; 40. Negative pressure suction mechanism; 50. Negative pressure docking seat; 60. Linkage drive mechanism; 70. Negative pressure path adjustment mechanism; 80. Liquid supply path adjustment mechanism; 11. Card slot; 12. Negative pressure external interface; 13. Pressure relief button; 14. Drainage seal; 15. Central support rod; 31. External liquid supply inlet pipe; 32. Emulsifying needle liquid supply pipe; 41. Negative pressure reversing connection pipe; 51. Differential pressure kinetic energy generation mechanism; 52. Liquid collection pipe; 511. Outer cylinder; 512. Damping connecting hole; 513. Slip ring; 514. Stress 515. Spherical plate, 516. Stop frame, 61. Spring, 62. LED light, 63. Linkage rod, 71. First driving component, 71. Negative pressure flow rate control unit, 711. First intercepting end plate, 712. Second intercepting end plate, 713. First central rotating block, 714. First arc-shaped through hole, 81. Connecting pipe, 811. Valve, 82. Liquid supply flow rate control assembly, 821. Isolation frame, 822. Flow rate control unit, 823. Second driving component, 8221. Third intercepting end plate, 8222. Fourth intercepting end plate, 8223. Second central rotating block, 8224. Second arc-shaped through hole. Detailed Implementation
[0017] To better understand the technical solutions provided in the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.
[0018] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The term "two or more" includes two or more cases.
[0019] like Figures 1 to 9 As shown, this embodiment provides a disposable fluid cartridge assembly for ophthalmic surgical systems, used for perfusion and aspiration during phacoemulsification cataract surgery. The assembly includes a fluid cartridge 10 and a retainer 20 disposed on the top end face of the fluid cartridge 10. The top end face of the retainer 20 integrates a fluid supply circulation mechanism 30, a negative pressure aspiration mechanism 40, a negative pressure docking seat 50, a linkage drive mechanism 60, a negative pressure path adjustment mechanism 70, and a fluid supply path adjustment mechanism 80.
[0020] The fluid supply and circulation mechanism 30 is located on the top right side of the holder 20. It is used to connect the external fluid supply bag and to the fluid supply interface of the emulsification needle to infuse the anterior chamber of the eye with infusion fluid to maintain the anterior chamber filling. The negative pressure suction mechanism 40 is arranged horizontally to the side of the fluid supply and circulation mechanism 30. Its right end is connected to the suction interface of the emulsification needle, and its left end is connected to the negative pressure docking seat 50. It is used to suction out the emulsified lens nucleus and infusion fluid by negative pressure.
[0021] The negative pressure docking seat 50 is located on the left side of the top end face of the card holder 20 and communicates with the left end of the negative pressure suction mechanism 40. The linkage drive mechanism 60 is located on the card holder 20 between the negative pressure docking seat 50 and the liquid supply path adjustment mechanism 80. The negative pressure path adjustment mechanism 70 is located in the middle of the linkage drive mechanism 60, and the negative pressure suction mechanism 40 passes through the negative pressure path adjustment mechanism 70. The liquid supply path adjustment mechanism 80 is located on the top end face of the card holder 20 and is connected to the liquid supply circulation mechanism 30.
[0022] like Figure 1 and Figure 3 As shown, in some examples, the fluid box 10 is a hollow box with a slot 11 located in the middle of its left side for snapping the entire fluid box assembly into place on the corresponding mounting position of the ophthalmic surgical equipment. The top left side of the fluid box 10 protrudes, and a negative pressure external interface 12 is located on the top surface of the protrusion for connecting to an external negative pressure pump pipeline. A pressure relief button 13 is located on the side wall of the protrusion, allowing the inner cavity of the fluid box 10 to communicate with the outside atmosphere under external force. A drain seal 14 is located at the bottom right side of the fluid box 10 for draining waste fluid accumulated inside after use.
[0023] Multiple sets of equidistant central support rods 15 are provided in the inner cavity of the fluid box 10. The central support rods 15 are connected between the relative inner walls of the fluid box 10 to maintain the stability of the box shape and prevent the box from deforming under negative pressure and affecting the internal flow path.
[0024] like Figure 2 As shown, in some examples, the fluid supply circulation mechanism 30 includes an external fluid supply inlet tube 31 and an emulsifying needle fluid supply tube 32. The outer end of the external fluid supply inlet tube 31 is used to connect to an external fluid supply bag or fluid supply device, and the inner end of the external fluid supply inlet tube 31 is connected to the inner cavity of the cylinder in the fluid supply path adjustment mechanism 80. One end of the emulsifying needle fluid supply tube 32 extends into the inner cavity of the cylinder in the fluid supply path adjustment mechanism 80, and the other end is connected to the fluid supply interface of the emulsifying needle. The infusion fluid enters the fluid supply path adjustment mechanism 80 through the external fluid supply inlet tube 31, and is then delivered to the emulsifying needle through the emulsifying needle fluid supply tube 32, ultimately being injected into the anterior chamber of the eye.
[0025] like Figures 2 to 4 As shown, the negative pressure aspiration mechanism 40 includes a negative pressure reversing connecting tube 41. Since the negative pressure aspiration mechanism 40 passes through the negative pressure channel adjustment mechanism 70, the tube section after passing through the negative pressure channel adjustment mechanism 70 is configured as the negative pressure reversing connecting tube 41. One end of the negative pressure reversing connecting tube 41 is connected to the negative pressure channel adjustment mechanism 70, and the other end is connected to the negative pressure docking seat 50. The liquid and tissue debris aspirated by the emulsification needle enter the negative pressure docking seat 50 via the negative pressure aspiration mechanism 40, the negative pressure channel adjustment mechanism 70, and the negative pressure reversing connecting tube 41.
[0026] The negative pressure docking seat 50 includes a seat body with a liquid collecting pipe 52 at its bottom end. The liquid collecting pipe 52 passes through the top wall of the fluid box 10, and its two ends are connected to the inner cavity of the seat body and the inner cavity of the fluid box 10, respectively. Liquid entering the negative pressure docking seat 50 flows into the inner cavity of the fluid box 10 through the liquid collecting pipe 52 for temporary storage. A differential pressure kinetic energy generating mechanism 51 is provided on the side wall of the negative pressure docking seat 50. The differential pressure kinetic energy generating mechanism 51 is used to generate kinetic energy based on the negative pressure intensity inside the seat body to drive the linkage rod 62 to move.
[0027] like Figure 5 and Figure 6 As shown, the differential pressure kinetic energy generating mechanism 51 includes an outer cylinder 511, a damping connecting hole 512, a slip ring 513, a stress spherical plate 514, a stop frame 515, and a spring 516.
[0028] The outer cylinder 511 is fixedly fastened to the side wall of the negative pressure docking seat 50, and the length direction of the outer cylinder 511 is parallel to the length direction of the linkage rod 62. A through damping connecting hole 512 is opened at the center of the outer end of the outer cylinder 511. The damping connecting hole 512 is a capillary hole that slowly connects the outside atmosphere with the inner cavity of the outer cylinder 511.
[0029] The slip ring 513 is disposed in the inner cavity of the outer cylinder 511 and can slide along the length of the inner cavity of the outer cylinder 511. The stress spherical plate is a sheet-like member capable of elastic deformation. The stress spherical plate is disposed on the inner side of the slip ring and is linked to the slip ring. In its natural state, the stress spherical plate protrudes away from the inner cavity of the negative pressure docking seat, and can switch its shape between protruding outward and protruding inward under the action of pressure difference. The stress spherical plate 514 is disposed in its natural state to protrude away from the inner cavity of the negative pressure docking seat 50.
[0030] A stop frame 515 is disposed within the inner cavity of the outer cylinder 511, located at the limit position of the slip ring 513's movement toward the negative pressure docking seat 50, to prevent the slip ring 513 from moving out of the outer cylinder 511. A spring 516 is disposed between the stop frame 515 and the slip ring 513, to provide a restoring force to the slip ring 513 in a direction away from the negative pressure docking seat 50. The left end of the linkage rod 62 is fixedly connected to the middle position of the stress spherical plate 514.
[0031] like Figure 8 As shown, in some examples, the linkage drive mechanism 60 includes a sliding outer cover, an LED light 61, a linkage rod 62, and a first drive member 63. The sliding outer cover is mounted on the card holder 20, and the linkage rod 62 is slidably disposed inside the sliding outer cover. The LED light 61 is disposed on the outside of the sliding outer cover and is configured to cooperate with the linkage rod 62. When the linkage rod 62 reaches the trigger position of the second stage displacement, the LED light 61 is turned on by a sliding switch.
[0032] The first driving component 63 is located in the middle of the linkage rod 62. The movement of the linkage rod 62 drives the first driving component 63 to move synchronously, thereby driving the negative pressure passage regulating mechanism 70 to achieve flow regulation. The first driving component 63 and the negative pressure passage regulating mechanism 70 can be connected by a gear and rack transmission, or by a friction wheel and friction plate transmission.
[0033] like Figure 6 and Figure 7 As shown, in some examples, the negative pressure channel adjustment mechanism 70 includes a protective cover that is fastened to the outside of the sliding outer cover. The front and rear ends of the protective cover are respectively connected to one end of the negative pressure suction mechanism 40 and one end of the negative pressure reversing connecting pipe 41. A negative pressure flow rate control unit 71 is provided in the inner cavity of the protective cover, and both the negative pressure suction mechanism 40 and the negative pressure reversing connecting pipe 41 are connected to the negative pressure flow rate control unit 71.
[0034] The negative pressure flow rate control unit 71 includes a first intercepting end piece 711 and a second intercepting end piece 712 located at both ends of the protective cover. A rotatable first central rotating block 713 is disposed between the first intercepting end piece 711 and the second intercepting end piece 712. The first intercepting end piece 711, the second intercepting end piece 712, and the first central rotating block 713 are each provided with a first arc-shaped through hole 714. Multiple first arc-shaped through holes 714 are arranged circumferentially, for example, three. The first intercepting end piece 711 and the second intercepting end piece 712 are fixedly disposed, and the outer wall of the first central rotating block 713 is connected to the first driving member 63 via a transmission connection.
[0035] The movement of the linkage rod 62 drives the first driving member 63 to move, which in turn drives the first central rotating block 713 to rotate. The rotation of the first central rotating block 713 can change the overlapping area of the multiple first arc-shaped through holes 714 on the first central rotating block 713 and the multiple first arc-shaped through holes 714 on the first intercepting end plate 711 and the second intercepting end plate 712, thereby adjusting the flow area of the negative pressure pipeline. The first arc-shaped through holes 714 on the first intercepting end plate 711 and the second intercepting end plate 712 and the first arc-shaped through holes 714 on the first central rotating block 713 have a completely non-overlapping fully closed state, so as to completely seal the negative pressure pipeline during the second stage displacement.
[0036] like Figure 8 and Figure 9As shown, in some examples, the liquid supply path regulating mechanism 80 includes a connecting pipe 81 and a liquid supply flow rate control component 82. The connecting pipe 81 is connected to the casing of the liquid supply flow rate control component 82, and a valve 811 is provided on the connecting pipe 81. The function of the connecting pipe 81 is to be used when the device is only performing a single suction function. Because air must be prevented from entering the pipeline, liquid needs to be continuously supplied to the pipeline through the connecting pipe 81 during the suction-only phase to prevent air from entering the pipeline. In the two working modes of simultaneous delivery and suction and flushing only, the connecting pipe 81 can be closed by the valve 811.
[0037] The liquid supply flow rate control assembly 82 includes a cylindrical cover, and an isolation frame 821 is disposed in the inner cavity of the cylindrical cover. An external liquid supply inlet pipe 31 is connected to the inner cavity of the cylindrical cover, a connecting pipe 81 is connected to the inner cavity of the cylindrical cover, and an emulsifying needle liquid supply pipe 32 passes through the inner cavity of the cylindrical cover and is connected to the inner cavity of the isolation frame 821. The inner cavity of the isolation frame 821 communicates with the inner cavity of the cylindrical cover.
[0038] A liquid supply flow rate control unit 822 is provided at the connection port between the emulsification needle supply tube 32 and the inner cavity of the isolation frame 821. The end of the linkage rod 62 extends to the lower part of the inner cavity of the sleeve, and a second driving member 823 is provided at the end of the linkage rod 62, which extends into the inner cavity of the isolation frame 821.
[0039] The liquid supply flow rate control unit 822 specifically includes a third intercepting end piece 8221 fixed on the communication port between the isolation frame 821 and the inner cavity of the shroud, and a fourth intercepting end piece 8222 fixed on the connection port between the emulsifying needle supply tube 32 and the isolation frame 821. A second central rotating block 8223 is disposed between the third intercepting end piece 8221 and the fourth intercepting end piece 8222, and the second central rotating block 8223 is rotatable. The outer wall of the second central rotating block 8223 is connected to the second driving member 823 through a transmission, which can be achieved by a gear or friction wheel structure.
[0040] Second arc-shaped through holes 8224 are provided on the third intercepting end piece 8221, the fourth intercepting end piece 8222, and the second central rotating block 8223. Multiple second arc-shaped through holes 8224 are arranged circumferentially. The configuration of the second arc-shaped through holes 8224 is the same as that of the first arc-shaped through holes 714. The three second arc-shaped through holes 8224 on the third intercepting end piece 8221, the fourth intercepting end piece 8222, and the second central rotating block 8223 are also completely non-overlapping, the purpose of which is to completely stop the liquid supply during the second stage of displacement.
[0041] The work process is as follows: Normal working status In normal perfusion and aspiration operation mode, the perfusion fluid enters the emulsification needle and is injected into the anterior chamber of the eye through the external supply inlet pipe 31, the supply path adjustment mechanism 80, and the emulsification needle supply pipe 32, maintaining anterior chamber filling. Simultaneously, the external negative pressure pump creates negative pressure within the fluid box 10 and the negative pressure docking seat 50 via the negative pressure external interface 12. The emulsification needle draws out the perfusion fluid and emulsified lens tissue from the anterior chamber, which then flows through the negative pressure suction mechanism 40, the negative pressure path adjustment mechanism 70, and the negative pressure reversing connection pipe 41 into the negative pressure docking seat 50, and then flows into the fluid box 10 through the collection pipe 52. At this time, the negative pressure intensity within the negative pressure docking seat 50 is within the normal range, the differential pressure kinetic energy generation mechanism 51 does not activate, the linkage rod 62 is in its initial position, and both the negative pressure path adjustment mechanism 70 and the supply path adjustment mechanism 80 are fully open.
[0042] Phase 1 response to initial congestion When the aspiration port of the emulsifying needle is blocked by obstructions such as lens nuclei, the negative pressure pump continues to operate, and the pressure inside the fluid box 10 and the negative pressure docking seat 50 connected to it gradually decreases. Since the damping connecting hole 512 is a capillary, outside air is slowly introduced, creating a pressure difference between the inner cavity of the outer cylinder 511 and the negative pressure docking seat 50. Under the action of this pressure difference, the slip ring 513 overcomes the elastic force of the spring 516 and moves towards the inner cavity of the negative pressure docking seat 50, simultaneously driving the linkage rod 62, which is fixedly connected to the middle of the stress spherical plate 514, to move in the same direction.
[0043] The movement of the linkage rod 62 drives the first central rotating block 713 in the negative pressure passage adjustment mechanism 70 to rotate via the first driving component 63. This reduces the overlapping area of the first arc-shaped through hole 714, thereby narrowing the flow area of the negative pressure pipeline, reducing the negative pressure suction flow rate, and preventing instantaneous large-flow over-suction caused by negative pressure accumulation when blockages are suddenly cleared. Simultaneously, the second driving component 823 at the end of the linkage rod 62 drives the second central rotating block 8223 in the liquid supply passage adjustment mechanism 80 to rotate, reducing the overlapping area of the second arc-shaped through hole 8224, decreasing the amount of liquid supplied to the eyeball, and correspondingly maintaining intraocular pressure within a reasonable range. Through the above-mentioned linkage adjustment, the negative pressure suction flow rate and the liquid supply replenishment flow rate change synchronously, preventing the eyeball from becoming sunken or experiencing overpressure.
[0044] Slow reset after the blockage clears itself After a period of time, if the blockage is cleared by the negative pressure, the blockage will enter the negative pressure suction mechanism 40 and the negative pressure reversing connecting pipe 41 from the emulsification needle, and finally enter the negative pressure docking seat 50. At this time, the negative pressure intensity in the negative pressure docking seat 50 begins to recover, but due to the capillary damping effect of the damping connecting hole 512, the elimination of the pressure difference between the inner cavity of the outer cylinder 511 and the negative pressure docking seat 50 is slow. The slip ring 513 slowly resets under the action of the spring 516, and the reset of the linkage rod 62 is also slow. At the same time, the negative pressure passage adjustment mechanism 70 gradually restores the flow area of the negative pressure passage. Through the slow pressure relief characteristic of the damping connecting hole 512, the surge and over-suction caused by the instantaneous full opening of the negative pressure passage after the blockage is cleared can be effectively avoided, further preventing the eyeball from sinking.
[0045] Phase 2 Response to Persistent Congestion If the blockage is large enough, it is difficult for the emulsifying needle to draw it back in. The blockage continues to block the suction port of the emulsifying needle, and the negative pressure continues to increase. This further increases the negative pressure in the cavity of the fluid box 10, and further reduces the pressure inside the negative pressure docking seat 50. The slip ring 513 continues to slide until it reaches its limit position against the stop frame 515, driving the linkage rod 62 to complete the first stage of displacement. Due to the stubborn blockage and the continued increase in negative pressure, the pressure difference will eventually drive the stress ball plate 514 to deform. The end of the stress ball plate 514 that protrudes outward will become concave and bulge inward, that is, it will switch from the default outward bulge to inward bulge, thereby driving the linkage rod 62 to perform the second stage of displacement.
[0046] The second-stage displacement drives the negative pressure channel adjustment mechanism 70 and the liquid supply channel adjustment mechanism 80, causing both the first arc-shaped through-hole 714 and the second arc-shaped through-hole 8224 to reach a completely closed state without overlap, thereby completely sealing the negative pressure pipeline and the liquid inlet pipeline. Simultaneously, the second-stage movement of the linkage rod 62 triggers a photoelectric or sliding switch, illuminating the LED light 61 as a warning. At this point, the staff knows that the emulsification needle has encountered a stubborn blockage and cannot be drawn back. Both liquid supply and aspiration stop, and the blockage loses its negative pressure adsorption force, naturally becoming unrestrained and suspended in the eyeball. The staff can then confirm the current situation.
[0047] Manual pressure relief and secondary adsorption After confirming the stubborn blockage, the staff can operate the pressure relief button 13 by rotating or pressing it to connect the external air pressure with the inner cavity of the fluid box 10. After connection, the pressure in the inner cavity of the fluid box 10 and the negative pressure docking seat 50 returns to atmospheric pressure, and the deformation of the stress spherical plate 514 naturally recovers, returning to its initial outward convex shape, driving the linkage rod 62 to reset. After reset, the negative pressure passage adjustment mechanism 70 and the liquid supply passage adjustment mechanism 80 return to the fully open state, and the equipment performs flushing and suction again. Because the position and posture of the blockage change after losing negative pressure adsorption, when it is adsorbed again, its shape, adsorption position, and angle of entry into the channel are different from those of the first adsorption. Therefore, this adsorption can attempt to adsorb the blockage again without other actions or additional equipment, increasing the probability of stubborn blockages being adsorbed and reducing the operational burden on the staff.
[0048] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.
Claims
1. A disposable fluid cartridge assembly for an ophthalmic surgical system, comprising a fluid cartridge and a holder disposed on the fluid cartridge, wherein the holder is provided with a fluid supply and circulation mechanism and a negative pressure suction mechanism, the fluid supply and circulation mechanism being used to connect an external fluid supply source to the fluid supply interface of an emulsifying needle, and the negative pressure suction mechanism being used to connect the suction interface of the emulsifying needle to a negative pressure source, characterized in that: The card holder is also equipped with a negative pressure docking seat, a linkage drive mechanism, a negative pressure passage adjustment mechanism, and a liquid supply passage adjustment mechanism. The negative pressure docking seat is connected to the negative pressure liquid suction mechanism. The negative pressure docking seat is provided with a differential pressure kinetic energy generating mechanism, which is used to generate a displacement driving force according to the negative pressure intensity in the negative pressure docking seat. The linkage drive mechanism includes a linkage rod, one end of which is connected to the differential pressure kinetic energy generating mechanism to move axially under the drive of the differential pressure kinetic energy generating mechanism; The negative pressure passage adjustment mechanism is connected in series in the pipeline of the negative pressure liquid suction mechanism and is driven by the linkage rod, and is used to adjust the flow area of the pipeline of the negative pressure liquid suction mechanism under the drive of the linkage rod. The liquid supply passage adjustment mechanism is connected in series in the pipeline of the liquid supply circulation mechanism and is driven by the linkage rod, and is used to adjust the flow area of the pipeline of the liquid supply circulation mechanism under the drive of the linkage rod. The negative pressure channel adjustment mechanism and the liquid supply channel adjustment mechanism are linked by the linkage rod to synchronize the negative pressure suction flow rate and the liquid supply replenishment flow rate. The differential pressure kinetic energy generating mechanism includes an outer cylinder, a slip ring, a stress spherical plate, a stop frame, and a spring; The outer cylinder is fixed to the side wall of the negative pressure docking seat, and a damping communication hole is provided at the outer end of the outer cylinder, which connects the outside world with the inner cavity of the outer cylinder. The slip ring is slidably disposed in the inner cavity of the outer cylinder. The inner cavity of the outer cylinder is also provided with a stop frame for limiting the slip ring. The stress ball plate is disposed on the inner side of the slip ring. The stress ball plate protrudes to the side away from the inner cavity of the negative pressure docking seat in its natural state and can change shape under the action of pressure difference. The spring is disposed inside the outer cylinder and is used to provide a restoring force to the slip ring; The end of the linkage rod is fixedly connected to the middle of the stress spherical plate.
2. The disposable fluid cartridge assembly for ophthalmic surgical systems according to claim 1, characterized in that, The linkage has a first-stage displacement and a second-stage displacement; During the first stage of displacement, the slip ring slides along the inner cavity of the outer cylinder toward the negative pressure docking seat, driving the linkage rod to move, thereby driving the negative pressure passage adjustment mechanism and the liquid supply passage adjustment mechanism to adjust the flow area of the pipeline; During the second stage of displacement, the stress spherical plate undergoes a shape change under the action of a continuously increasing pressure difference, changing from bulging outward to bulging inward, which drives the linkage rod to continue moving, so that the negative pressure passage adjustment mechanism and the liquid supply passage adjustment mechanism completely block the corresponding pipeline.
3. The disposable fluid cartridge assembly for ophthalmic surgical systems according to claim 2, characterized in that, The linkage drive mechanism also includes an LED warning light, which is configured in conjunction with the linkage rod to be illuminated when the linkage rod reaches the trigger position of the second stage displacement.
4. The disposable fluid cartridge assembly for ophthalmic surgical systems according to claim 1, characterized in that, The negative pressure channel adjustment mechanism includes a negative pressure flow rate control unit, which includes a first intercepting end plate, a second intercepting end plate, and a first central rotating block. The first intercepting end piece and the second intercepting end piece are respectively fixedly disposed at the two ends of the negative pressure liquid suction mechanism pipeline, and the first middle rotating block is rotatably disposed between the first intercepting end piece and the second intercepting end piece; The first intercepting end piece, the second intercepting end piece, and the first central rotating block are each provided with a plurality of first arc-shaped through holes arranged in a circumferential direction; The outer wall of the first central rotating block is connected to the first driving member on the linkage rod so that the movement of the linkage rod drives the first central rotating block to rotate, thereby changing the overlapping area of the first arc-shaped through hole on the first central rotating block and the first arc-shaped through hole on the first intercepting end piece and the second intercepting end piece.
5. The disposable fluid cartridge assembly for ophthalmic surgical systems according to claim 1, characterized in that, The liquid supply path adjustment mechanism includes a liquid supply flow rate control component, which includes an isolation frame, a liquid supply flow rate control unit, and a second driving component. The isolation frame is disposed in the pipeline of the liquid supply circulation mechanism, and the liquid supply flow rate control unit is disposed within the isolation frame; The liquid supply flow rate control unit includes a third intercepting end plate, a fourth intercepting end plate, and a second central rotating block. The third intercepting end plate, the fourth intercepting end plate, and the second central rotating block are respectively provided with a plurality of second arc-shaped through holes arranged in a circumferential direction. The second driving member is disposed at the end of the linkage rod, and the outer wall of the second central rotating block is connected to the second driving member for transmission, so as to drive the second central rotating block to rotate by the movement of the linkage rod, thereby changing the overlapping area of the second arc-shaped through hole.
6. The disposable fluid cartridge assembly for ophthalmic surgical systems according to claim 5, characterized in that, The linkage rod is connected to the corresponding first central rotating block and / or second central rotating block via a gear and rack transmission structure or a friction wheel transmission structure.
7. The disposable fluid cartridge assembly for ophthalmic surgical systems according to claim 1, characterized in that, The liquid supply circulation mechanism includes an external liquid supply inlet pipe and an emulsification needle liquid supply pipe; The outer end of the external liquid supply inlet pipe is used to connect to an external liquid supply source, and the inner end of the external liquid supply inlet pipe is connected to the liquid supply passage adjustment mechanism. One end of the emulsifying needle supply tube is connected to the supply channel adjustment mechanism, and the other end of the emulsifying needle supply tube is used to connect to the supply interface of the emulsifying needle.
8. The disposable fluid cartridge assembly for ophthalmic surgical systems according to claim 1, characterized in that, The liquid supply channel regulating mechanism is also connected to a connecting pipe, and a valve is installed on the connecting pipe; The connecting tube is used to replenish liquid into the pipeline of the negative pressure liquid suction mechanism in the suction-only working mode to prevent air from entering the pipeline; The valve is used to disconnect the connecting pipe in other operating modes.
9. The disposable fluid cartridge assembly for ophthalmic surgical systems according to claim 1, characterized in that, The fluid box is equipped with a pressure relief button and a drain seal; The pressure relief button is used to connect the inner cavity of the fluid box to the outside atmosphere under external force operation, so as to release pressure and reset the differential pressure kinetic energy generating mechanism; The drain plug is located at the bottom of the fluid box and is used to drain the waste liquid inside the fluid box.