Posterior capsule polishing device used in cataract treatment operation process

Abstract

The invention relates to the field of medical equipment, in particular to a posterior capsular membrane polishing device used in a cataract treatment surgery process, which comprises an operating end and a host end, the operating end comprises a pen type scour, a miniature brushless motor and a pressure sensor are arranged in the front end, and a hollow motor shaft is connected with an injector needle consisting of a polishing head, a needle stem and a needle seat; the flusher is provided with anti-slip lines, a rotation control key and a flow speed control key; the main machine end comprises a water supply end (a water pump and a water tank) and a control end, the water pump conveys normal saline to the polishing head, the control end achieves rotating speed / flow speed control, and the flow speed supports multi-gear self-definition. The pressure sensor monitors a force value, and when the force value exceeds the standard, sound-light alarm and shutdown protection are triggered. According to the device, polishing and flushing are synchronized, the accuracy and safety are improved, and iatrogenic injuries are reduced. According to the equipment, precise speed control, stable operation, multifunctional polishing and safety monitoring are achieved, cleaning thoroughness is improved, and the iatrogenic injury risk is reduced.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and more specifically to a posterior capsule polishing device used in cataract surgery. Background Technology

[0002] Cataracts, the leading cause of blindness worldwide, continue to rise in incidence with an aging population, severely impacting patients' visual health and quality of life, often necessitating cataract surgery. While other treatments exist (such as medication), cataract surgery remains the only universally recognized and most effective solution. With advancements in medical technology, cataract surgery has shifted from traditional "sight-restoring surgery" to "refractive surgery," demanding increasing precision and minimally invasive techniques in clinical practice. In recent years, advanced refractive lenses such as multifocal intraocular lenses and continuous-range intraocular lenses have been widely used clinically, significantly improving postoperative visual quality. However, secondary cataracts remain a key factor leading to postoperative visual decline, with an incidence exceeding 50%. Therefore, reducing the risk of secondary cataracts remains a crucial clinical issue that urgently needs to be addressed in the field of cataract surgery.

[0003] The most economical and practical strategy for preventing secondary cataracts is the traditional intraoperative posterior capsular polishing (PCV). During cataract surgery, the surgeon holds a syringe and uses saline solution to flush away the cortical material from the posterior capsule. After some cortex has detached, the syringe plunger is manually pulled back, increasing the internal space and creating suction. This suction forces any remaining detached cortex through the needle into the syringe barrel. This process is repeated until all remaining cortex is completely removed from the capsule.

[0004] However, this traditional intraoperative posterior capsule polishing method requires the surgeon to use one hand to hold the needle in place throughout the procedure. Therefore, the syringe plunger must be operated entirely with the surgeon's other hand. This leads to problems such as either excessively high water flow rate causing capsule damage or insufficient flow rate resulting in inadequate flushing force, failing to remove the cortical material from the posterior capsule surface. It also makes it impossible to precisely adjust the saline flow rate, volume, and flushing force according to the amount, size, and stubbornness of the cortical material to be removed. Furthermore, the limited internal space of the syringe restricts the amount of saline solution available for polishing. The surgeon must repeatedly draw water during polishing, which is time-consuming and laborious, significantly reducing polishing efficiency, increasing the risk of infection, and affecting surgical outcomes. Most alarmingly, prolonged exertion can easily cause tremors in the surgeon's hand, leading to needle deviation and iatrogenic damage such as posterior capsule rupture, severely impacting postoperative prognosis and potentially causing medical disputes.

[0005] To address the shortcomings of traditional polishing methods, those skilled in the art have continuously designed various devices to perform safer polishing of the posterior capsule surface during cataract surgery. For example, CN219461647U, "An Infusion-Aspiration Capsular Polisher for Cataract Surgery," utilizes an infusion bottle to increase the volume of saline solution. Doctors generally do not need to repeatedly draw water during polishing; even if a larger volume of water is required, simply adding more bottles significantly reduces the polishing time and the risk of infection for the patient. However, this device still faces many unresolved problems during use: (1) Although this device has an added liquid control switch, it essentially relies solely on gravity-driven water flow for flushing. While the flow rate is not high enough to damage the capsule, it becomes somewhat ineffective when encountering more stubborn cortical tissue. In other words, this device still cannot precisely adjust the flow rate and flushing force of the saline solution as needed. (2) During the polishing process, the doctor still needs to manually operate the syringe piston, which increases the doctor's workload and surgical risks; (3) The polishing method is limited. When dealing with stubborn skin, the surgery needs to be interrupted to replace the mechanical polishing instrument, which prolongs the operation time and increases the risk of infection.

[0006] Therefore, as cataract surgery trends towards "precision, minimally invasiveness, safety, efficiency, and intelligence," posterior capsule polishing, a crucial step in ensuring postoperative outcomes, has significant technical deficiencies that fall short of clinical needs. Current technology cannot meet the stringent requirements of high-end refractive lenses for posterior capsule cleanliness, nor can it completely eliminate the safety risks associated with manual operation. This results in some patients still facing problems such as a high incidence of secondary cataracts and poor postoperative visual recovery. Summary of the Invention

[0007] The purpose of this invention is to address the shortcomings of existing technologies by providing a device for posterior capsular fluid flow polishing after cataract surgery. By optimizing the device structure, upgrading the control method, and supplementing safety monitoring functions, it achieves "precision, stability, and multi-functionality" in posterior capsular polishing. While improving the thoroughness of residual cortical removal, it minimizes the risk of iatrogenic damage, providing a more reliable guarantee for the patient's postoperative visual quality, and meeting the current technological development needs of cataract refractive surgery.

[0008] The objective of this invention is achieved through the following approach: A posterior capsule polishing device for cataract surgery includes a main unit and an operating unit. The operating unit includes a pen-type brush, the head of which is provided with a syringe needle, and a water supply pipe is provided inside the pen-type brush. One end of the water supply pipe is connected to the syringe needle, and the other end is located at the tail of the pen-type brush. The main unit includes a control unit and a water supply unit. The water supply unit includes a water tank for holding physiological saline and a water pump for providing power to the physiological saline. The water outlet pipe of the water pump is located at the tail of the pen-type flusher and is connected to the water supply pipe of the pen-type flusher. The control terminal includes a control circuit board with a water supply signal output terminal that is electrically connected to the control terminal of the water pump. The water supply signal input terminal of the control circuit board is electrically connected to the flow rate control button on the pen-type flushing device, which allows the operator to control the flow rate of saline solution ejected from the syringe needle with one hand during cataract surgery.

[0009] Preferably, the front end of the pen-type flusher is further provided with a miniature brushless motor. The motor shaft of the miniature brushless motor is a hollow motor shaft. The hollow motor shaft extends out of the front end of the pen-type flusher and is fixedly connected to the syringe needle. The water supply pipe of the pen-type flusher passes through the hollow motor shaft and communicates with the syringe needle. The tip of the syringe needle is provided with a polishing head. The polishing head is provided with a guide hole for water outlet, and the outer surface of the polishing head is provided with protrusions for mechanical polishing. The control circuit board also has a rotation signal output terminal, which is electrically connected to the control terminal of the miniature brushless motor. The rotation signal input terminal of the control circuit board is connected to the rotation control button on the pen-type brush, which is used by the operator to control the rotation speed of the polishing head during cataract surgery.

[0010] Preferably, the outlet of the polishing head guide hole on the syringe needle is located around the water outlet end face of the polishing head, so that the saline solution ejected by the polishing head forms a spiral water flow as the polishing head rotates.

[0011] Preferably, there are multiple guide holes around the water outlet end face of the polishing head, and they are evenly distributed.

[0012] Preferably, the syringe needle is a straight needle or a curved needle, the polishing head is loosely fitted at the tip of the syringe needle, and the guide hole of the polishing head extends in a spiral shape inside the polishing head.

[0013] Preferably, the outer wall of the miniature brushless motor of the pen-type brusher is slidably fitted with the inner wall of the pen-type brusher, and a pressure sensor is abutted at the tail of the miniature brushless motor. The pressure sensor has a circular hole in the middle to make way for the water supply pipe of the pen-type brusher, and the water supply pipe of the pen-type brusher passes through the circular hole and communicates with the syringe needle.

[0014] Preferably, the pen-type brush has an anti-slip textured surface.

[0015] Preferably, the rotation control button is used to switch the speed of the motor rotation.

[0016] Preferably, the flow rate control button is used to control multiple flow rates of the water, and the multiple flow rates can be customized via an LCD screen.

[0017] The beneficial effects of this invention include the following: A posterior capsule polishing device for cataract surgery includes a main unit and an operating unit. The operating unit includes a pen-type brush, the head of which is provided with a syringe needle, and a water supply pipe is provided inside the pen-type brush. One end of the water supply pipe is connected to the syringe needle, and the other end is located at the tail of the pen-type brush. This invention discloses a posterior capsule polishing device for cataract surgery, comprising a main unit and an operating unit. The operating unit adopts a pen-type brush design, which conforms to ergonomic principles, adapts to the operator's hand grip posture, effectively reduces hand fatigue during prolonged surgical procedures, and ensures stable control of the pen-type brush. This allows for precise guidance of the syringe needle at the head of the brush to the target area of ​​the posterior capsule to be polished, directly solving the risk of accidental damage to intraocular tissues caused by unstable grip and positioning deviations in existing instruments (such as syringes), thus improving the accuracy and safety of surgical procedures. Simultaneously, the pen-type brush integrates a water delivery tube. Furthermore, one end of the water delivery tube is sealed and connected to the syringe needle, while the other end extends to the tail of the pen-type flushing device to form an external port. This built-in sealed connection structure avoids the water delivery tube from being exposed and coming into contact with the surgical environment, preventing external contaminants from adhering to the tube and causing saline contamination, thus meeting the stringent requirements of ophthalmic surgery for a sterile environment. On the other hand, the external port at the tail can be quickly connected to the water supply structure at the main unit and form a stable connection, effectively avoiding the problem of saline delivery interruption or leakage caused by loose connections in existing exposed tubes. This ensures that the flushing solution can be accurately and continuously applied to the target area through the syringe needle during the posterior capsule polishing process, guaranteeing the continuity and effectiveness of the polishing operation.

[0018] The main unit includes a control unit and a water supply unit. The water supply unit includes a water tank for holding physiological saline and a water pump for providing power to the physiological saline. The water outlet pipe of the water pump is located at the tail of the pen-type flusher and is connected to the water supply pipe of the pen-type flusher. The main unit of this invention includes a water supply end and a control end. The water supply end adopts a combination structure of "water tank + water pump". The water tank serves as a dedicated storage container for physiological saline. Its volume can be designed according to the routine duration of clinical surgery and the fluid supply requirements, ensuring that sufficient physiological saline can be provided for a single posterior capsule polishing surgery. This directly solves the problem that existing small fluid storage devices (such as syringes) need to replenish fluid midway due to insufficient fluid supply, which is time-consuming, laborious, and may even lead to surgical interruption, thus ensuring the continuity of surgical operation. Meanwhile, the water pump in this invention, as an active power source for fluid supply, breaks through the technical limitations of traditional instruments that rely on gravity for fluid supply (pressure weakens as the fluid level drops) or manual injection (pressure is unstable as the hand force changes). It can provide continuous and controllable stable power for the delivery of saline, ensuring that the saline is delivered to the syringe needle at a preset pressure through the water pump outlet pipe and the pen-type flushing device delivery pipe. This not only avoids the problem of insufficient flushing force that is easily caused when using an infusion bottle, but also avoids the problem of damage to the capsule caused by excessive flushing force when using a syringe.

[0019] The control terminal includes a control circuit board with a water supply signal output terminal that is electrically connected to the control terminal of the water pump. The water supply signal input terminal of the control circuit board is electrically connected to the flow rate control button on the pen-type flushing device, which allows the operator to control the flow rate of saline solution ejected from the syringe needle with one hand during cataract surgery.

[0020] The control terminal of this invention is based on a control circuit board. By "electrically connecting the water supply signal output terminal to the water pump control terminal", a channel for transmitting control signals to the power execution unit is constructed. This ensures that the control circuit board can accurately output regulation signals to change the water pump operating parameters (such as speed), providing a stable technical basis for flow rate regulation. Simultaneously, by electrically connecting the water supply signal input terminal to the flow rate control button of the pen-type flusher, the flow rate adjustment unit is directly integrated into the pen-type flusher held by the operator, forming a complete control chain of "operation terminal button input - control circuit board signal processing - water pump power adjustment - real-time flow rate change". This design allows the operator to control the flow rate in real time with just one hand, without having to change the hand position during surgery or rely on an assistant for adjustment. This effectively avoids instrument positioning deviation and surgical interruption caused by hand coordination or position changes. Moreover, the control circuit board can precisely convert the button input signal, causing the water pump output power to change accordingly. This allows for fine-tuning of the flow rate of saline from the syringe needle, meeting the needs of low-flow-rate flushing in sensitive areas of the posterior capsule (such as near the iris) to avoid tissue damage, and high-flow-rate flushing in areas with more residual lens epithelial cells to improve cleaning effect, significantly improving the safety and therapeutic effect of the surgical procedure.

[0021] Preferably, the front end of the pen-type flusher is further provided with a miniature brushless motor. The motor shaft of the miniature brushless motor is a hollow motor shaft. The hollow motor shaft extends out of the front end of the pen-type flusher and is fixedly connected to the syringe needle. The water supply pipe of the pen-type flusher passes through the hollow motor shaft and communicates with the syringe needle. The tip of the syringe needle is provided with a polishing head. The polishing head is provided with a guide hole for water outlet, and the outer surface of the polishing head is provided with protrusions for mechanical polishing. The pen-type flushing device of this invention integrates a miniature brushless motor at its front end. Its hollow motor shaft serves as both a "power output" and a "water delivery channel," fixing the syringe needle and providing rotational power to drive the polishing head, while also allowing the water delivery tube to pass through for saline delivery. This compact and highly integrated structure avoids the space constraints caused by multiple components. Furthermore, the protrusions on the outer surface of the polishing head, driven by the motor, utilize mechanical friction to remove residual lens epithelial cells from the posterior capsule, overcoming the shortcomings of traditional liquid flushing methods that are insufficient for thorough cleaning. Simultaneously, the internal drainage holes of the polishing head synchronously spray saline, enabling real-time flushing of polishing debris (preventing postoperative inflammation) and cooling of the polishing area (preventing excessive temperature generated by friction from damaging intraocular tissues).

[0022] The control circuit board also has a rotation signal output terminal, which is electrically connected to the control terminal of the miniature brushless motor. The rotation signal input terminal of the control circuit board is connected to the rotation control button on the pen-type brush, which is used by the operator to control the rotation speed of the polishing head during cataract surgery.

[0023] The control circuit board in this invention features a rotation signal output terminal, electrically connected to the control terminal of the miniature brushless motor. Simultaneously, the rotation signal input terminal is connected to the rotation control button on the pen-type brusher, establishing a complete control chain: "operator button input - control circuit board signal processing - motor speed adjustment - polishing head speed change." During surgery, the operator does not need to move their hand or operate additional equipment; they can precisely adjust the speed of the miniature brushless motor via the control circuit board by operating the rotation control button on the pen-type brusher with one hand, thereby controlling the rotation speed of the polishing head. Specifically, the speed can be lowered for sensitive areas of the posterior capsule (such as near the macula) to avoid tissue damage, while the speed can be increased for areas with more residual lens epithelial cells to improve removal efficiency, overcoming the shortcomings of traditional fixed-speed devices that either fail to clean thoroughly or easily damage tissue. Furthermore, the one-handed adjustment design ensures continuous surgical operation, avoiding positioning deviations or surgical delays caused by mid-operative equipment adjustments.

[0024] Preferably, the outlet of the polishing head guide hole on the syringe needle is located around the water outlet end face of the polishing head, so that the saline solution ejected by the polishing head forms a spiral water flow as the polishing head rotates.

[0025] In this invention, the guide hole outlet of the polishing head on the syringe needle is located around the water outlet face. Combined with the rotation of the polishing head with the miniature brushless motor, the saline solution is ejected in a spiral water flow. This water flow can evenly cover the entire polishing area as the polishing head rotates. Compared with traditional single-direction water flow, this significantly expands the rinsing range and enhances the local rinsing force, more efficiently removing lens epithelial cell debris generated by mechanical polishing, and completely solving the problem of postoperative inflammation caused by residual debris. At the same time, the gentle vortex formed by the spiral water flow avoids the direct impact of traditional direct water flow on delicate intraocular tissues (such as corneal endothelium and iris), greatly reducing the risk of tissue damage caused by excessively strong water flow.

[0026] Preferably, there are multiple guide holes around the water outlet end face of the polishing head, and they are evenly distributed.

[0027] In this invention, multiple evenly distributed guide holes are arranged around the water outlet face of the polishing head. Physiological saline can be simultaneously output through these multiple guide holes. Combined with the rotation of the polishing head, this significantly improves the uniformity and coverage density of the spiral water flow, completely avoiding the problems of concentrated water flow and localized water imbalance caused by traditional single-outlet methods. Furthermore, the evenly distributed guide hole layout allows the water flow to form a stable and symmetrical scouring field in the polishing area. This not only comprehensively envelops the polishing area, efficiently removing lens epithelial cell debris generated by mechanical polishing and preventing postoperative inflammation caused by localized residues, but also evenly disperses the water flow impact force across multiple outlets, preventing damage to delicate intraocular tissues such as the corneal endothelium and iris due to localized water flow concentration. Simultaneously, the multi-outlet design increases the saline delivery rate per unit time, ensuring efficient coordination between water scouring and the mechanical movement of the polishing head, avoiding problems such as insufficient fluid supply affecting cleaning efficiency.

[0028] Preferably, the syringe needle is a straight needle or a curved needle, the polishing head is loosely fitted at the tip of the syringe needle, and the guide hole of the polishing head extends in a spiral shape inside the polishing head.

[0029] The syringe needle in this invention features a multi-option design, allowing for both straight and curved needles, thus solving the problem of traditional single-type needles being unable to reach certain areas. Straight needles facilitate precise access to the central region of the posterior capsule, while curved needles can accommodate the needs of operating on concealed areas around the posterior capsule, significantly improving the instrument's applicability to various surgical scenarios. This polishing head, loosely fitted onto the needle tip, utilizes only the scouring force generated by the water flow and the rotational pushing force of the water flow for polishing. Compared to syringe needles where the polishing head is fixed to the needle tip, the polishing force is relatively gentle.

[0030] Furthermore, the guide holes of the polishing head are all designed as spiral-shaped through holes inside the polishing head. This not only actively guides the saline solution to form a spiral jet, but also uses the thrust of the water flow to rotate the polishing head that is fitted with the needle tip. It can form a spiral water jet for polishing without the need for motor power. At the same time, the protrusions of the polishing head can be used for gentler mechanical polishing. It can even be combined with the rotation of the motor shaft to further enhance the water flow's ability to entrain and carry away debris (only applicable to straight needles). This solves the defects of traditional straight-hole water flow, such as "weak entrainment force and easy debris residue", and improves the cleaning effect.

[0031] Furthermore, by altering the density and height of the protrusions on the polishing head, as well as the diameter and number of the guide holes, and even the helical angle, various polishing heads adaptable to different needs can be created. These can then be mounted on syringe needles to form different types of syringe needles. During surgery, simply changing the syringe needle can meet different polishing requirements, offering convenience and speed. This significantly improves the clinical versatility and flexibility of the polishing device, adapting to differences in the amount of residual epithelial cells in the posterior capsule and the sensitivity of different patients.

[0032] Preferably, the outer wall of the miniature brushless motor of the pen-type brusher is slidably fitted with the inner wall of the pen-type brusher, and a pressure sensor is abutted at the tail of the miniature brushless motor. The pressure sensor has a circular hole in the middle to make way for the water supply pipe of the pen-type brusher, and the water supply pipe of the pen-type brusher passes through the circular hole and communicates with the syringe needle.

[0033] In this invention, the pen tip of the pen-type brusher is also equipped with a pressure sensor. A miniature brushless motor is radially positioned within the internal space between the pressure sensor and the pen tip, allowing the outer wall of the miniature brushless motor to slide against the inner wall of the pen-type brusher, with the motor tail abutting against the pressure sensor, thus establishing a complete mechanism of "pressure transmission - real-time monitoring". When the polishing head contacts the rear capsule, the reaction force of the rear capsule on the polishing head pushes the syringe needle and the hollow motor axially to move towards the motor tail. The motor slides along the inner wall of the pen-type brusher and squeezes the pressure sensor. The high-precision pressure sensor can collect the contact pressure signal in real time (which can be fed back to the operator through the control terminal), solving the problem of overpressure damage caused by the traditional "judging pressure by experience". This provides the operator with a precise basis for adjusting the polishing intensity (for example, an LCD screen can be set at the pen tip or the main unit to display the pressure, or multiple pressure thresholds can be set, automatically cutting off power and water when the threshold is exceeded, or reducing the water flow / motor speed, etc.). Meanwhile, the circular hole in the middle of the pressure sensor makes way for the water delivery pipe, preventing the sensor from obstructing the water delivery line, ensuring smooth delivery of saline solution, and not affecting the original function of "polishing and rinsing at the same time".

[0034] Preferably, the pen-type brush has an anti-slip textured surface.

[0035] The pen-shaped flushing device of this invention features an anti-slip textured design, which increases the friction between the hand (including surgical gloves) and the outer wall of the flushing device. Even if the operator holds it for a long time and their hands are slightly sweaty, they can still hold the instrument stably, avoiding slippage that could lead to positioning deviation of the polishing head. This reduces the risk of accidentally touching the corneal endothelium, iris, and other delicate intraocular tissues from the source, while ensuring polishing accuracy. Furthermore, the stable grip reduces hand muscle tension, lowers operator fatigue, and ensures smooth operation throughout the entire procedure.

[0036] Preferably, the rotation control button is used to switch the speed of the motor rotation.

[0037] In this invention, the operator can use the rotary control button to control the motor to quickly switch between multiple rotation speeds according to actual needs for polishing.

[0038] Preferably, the flow rate control button is used to control multiple flow rates of the water, and the multiple flow rates can be customized via an LCD screen.

[0039] In this invention, the flow rate control button allows for multi-level adjustment of the water flow, solving the problem of poor adaptability of a single flow rate. For sensitive areas of the posterior capsule (such as near the macula), a low-speed water flow can be selected to avoid tissue damage, while for areas with more residual lens epithelial cells, a high-speed water flow can be selected to improve cleaning efficiency. Simultaneously, it supports custom setting of multiple flow rate parameters via the main unit's LCD screen. Operators can preset precise flow rate levels based on differences in surgical type (such as complex cataract polishing or routine cataract polishing), patient posterior capsule thickness / sensitivity, etc., overcoming the limitations of traditional fixed-speed settings that cannot meet personalized surgical needs.

[0040] In summary, the advantages of this invention are as follows: ① The posterior capsule polishing device of the present invention integrates all core functional components such as water delivery tube, miniature brushless motor (including hollow motor shaft), pressure sensor, and polishing head into a pen-type flushing device. The hollow motor shaft cleverly combines the dual functions of "power output (driving the polishing head to rotate)" and "water delivery channel (supplying physiological saline)". It provides rotational power to the syringe needle to drive the polishing head, and also allows the water delivery tube to pass through to achieve stable delivery of physiological saline. This avoids the operation restrictions caused by multiple components occupying space. The operator does not need to transfer their hands or rely on assistants. The entire process can be completed with one hand, avoiding positioning deviation and surgical interruption caused by the coordination of two hands.

[0041] ② The pen-type flushing device of this invention is ergonomically designed to fit the natural grip posture of the hand. The anti-slip texture on the outer wall increases the friction between the hand (including surgical gloves) and the instrument, effectively reducing hand fatigue during long-term surgery. Furthermore, the water supply pipe, motor, and other components are all built-in, which avoids the contamination of saline solution caused by the exposed pipes coming into contact with the surgical environment, meeting the sterile requirements of ophthalmic surgery. It also reduces the risk of delivery interruption or leakage caused by loose connections of traditional exposed pipes. Moreover, all core operating controls (such as water flow rate adjustment, motor speed control, polishing mode switching, etc.) are integrated into the pen-type flushing device. Operators do not need to transfer their hands or rely on assistants. They can complete the entire process with one hand, completely avoiding the problems of instrument positioning deviation and surgical interruption caused by two-handed coordination.

[0042] ③ The pressure sensor of the present invention has a specially designed water pipe with a round hole in the middle. While monitoring the polishing contact pressure in real time, it does not obstruct the flow of water. The polishing head is fitted with the syringe needle and supports the flexible selection of straight / curved needles. It can quickly change polishing heads of different specifications according to surgical needs, and can accurately reach different areas such as the center and periphery of the posterior capsule, significantly improving structural flexibility and clinical adaptability.

[0043] ④ This invention utilizes a synergistic design of "mechanical + water flow." The raised outer surface of the polishing head mechanically removes residual lens epithelial cells, effectively removing residual lens epithelial cells from the posterior capsule. An internal guide hole simultaneously sprays physiological saline, creating a spiral water flow as the polishing head rotates. Compared to traditional straight-hole water flow, the spiral water flow utilizes centrifugal force and vortex effect to expand the scouring coverage area, increase local shear force, and enhance the ability to peel away residual cortex. It also disperses the impact force of the water flow, avoiding damage to delicate intraocular tissues such as the corneal endothelium and iris caused by direct water flow.

[0044] ⑤ This invention constructs a fully controllable system encompassing "pressure, rotation speed, and flow rate." The pressure sensor can collect polishing contact pressure signals in real time (via feedback from the host unit), preventing overpressure damage caused by traditional "pressure judgment based on experience." The rotation control button supports rapid switching between multiple motor rotation speeds, precisely adapting to different scenarios such as initial light cleaning, deep residue prevention, and stubborn residue removal, meeting diverse needs without frequent instrument changes. The flow rate control button allows for multi-level adjustment and supports customizing flow rate parameters for each level via the LCD screen. Combined with active liquid supply from the water pump (replacing traditional gravity or manual injection), it ensures stable saline delivery pressure, completely avoiding flow rate fluctuations caused by traditional hand-operated syringes. The LCD screen can also display parameters such as current flow rate, polishing head pressure, and water tank level in real time, allowing operators to intuitively control the operation rhythm and further improving the accuracy of function control.

[0045] ⑥ In terms of the power system, the device of this invention uses a water pump for active fluid supply instead of traditional gravity-based fluid supply (where pressure weakens as the fluid level drops) or manual injection (where pressure is unstable due to variations in hand pressure). Combined with precise signal transmission from the control circuit board, this provides continuous and stable power for the delivery of physiological saline, ensuring controllable flushing results. In terms of the drive system, a miniature brushless motor replaces traditional non-powered polishing, and with precise speed adjustment, it solves the technical defects of traditional instruments, such as "unstable power and uncontrollable polishing effect." Simultaneously, the design of real-time multi-parameter display, one-button switching between multiple modes, and customizable multi-level adjustment eliminates the need for frequent equipment adjustments or instrument changes, significantly shortening surgical time and reducing operational complexity. By efficiently removing residual lens epithelial cells, it effectively reduces the risk of posterior cataracts, improves postoperative prognosis, and provides a safer and more efficient operating tool for clinical practice while retaining the convenience and economy of "intraoperative posterior capsular polishing."

[0046] Glossary Needle stem: Generally refers to the long, thin tubular part in a syringe needle that connects the needle tip to the needle hub, serving as a channel for liquid flow. Its length and diameter vary depending on the application (such as the surgical site, required flow rate, etc.). In this invention, however, it refers to the long, thin tubular part used to connect the polishing head and the needle hub.

[0047] Needle hub: This usually refers to the part of a syringe where the needle connects to the syringe body. It is typically designed with an anti-slip or snap-fit ​​structure to ensure the needle is securely mounted on the syringe, preventing it from falling off or leaking during use. In this invention, however, it refers to the part that fits onto the motor shaft of a miniature brushless motor, fixing the syringe needle to the motor shaft.

[0048] Needle tip: The front end of the needle is usually polished to make it sharp and pointed, so as to smoothly pierce human tissue or cavity (such as the peripapillary region in cataract surgery) and reduce resistance and damage during puncture. The polishing head described in this invention is actually a specially designed polishing head set at the needle tip of a syringe needle (it can also be understood that the syringe needle of this invention is actually a specially designed polishing head set at the needle tip of a syringe needle). This polishing head has multiple guide holes along its axis. Water is ejected from these guide holes of the polishing head. Under the action of centrifugal force generated by the rotation of the polishing head, the water flow changes from a straight water flow to a rotating water flow (i.e., a spirally ejected water flow). Attached Figure Description

[0049] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the pen-type flushing device in this invention; Figure 3This is a schematic diagram A (including a cross-sectional view of AA) of a polishing head that is loosely fitted onto the syringe needle in an embodiment of the present invention; wherein, Figure 3 (a) in the figure is a cross-sectional view of the polishing head along direction A, used to show the internal structure of the polishing head. Figure 3 (b) in the diagram is a schematic diagram of the external structure of the polishing head; Figure 4 This is a schematic diagram of the control terminal in this invention; Figure 5 This is a three-dimensional schematic diagram of the present invention; Figure 6 This is a schematic diagram of the syringe needle in the pen-type flusher of the present invention; Figure 7 This is a schematic diagram of the spiral water flow exiting the polishing head in this invention; Figure 8 This is a schematic diagram of a spiral water jet ejected from a bent needle in an embodiment of the present invention; Figure 9 This is a schematic diagram of the bent needle head in an embodiment of the present invention; Figure 10 This is a schematic diagram of the structure of the needle seat, needle shaft, and polishing head mounting post on the bent needle head in an embodiment of the present invention; 1. Pen-type flusher; 2. Syringe needle; 3. Polishing head; 4. Anti-slip texture; 5. Flow rate control button; 6. Rotation control button; 7. Signal cable; 8. Water outlet pipe; 9. LCD screen; 10. Water tank; 11. Saline bottle; 12. Sterile interface; 13. Miniature brushless motor; 14. Pressure sensor; 15. Control circuit board; 16. Water suction pipe; 17. Water pump; 18. Needle holder; 19. Hollow motor shaft; 20. Needle seat; 21. Water delivery pipe; 22. Protrusion; 23. Polishing head mounting post; 24. Guide hole; 25. Polishing head rotation mating hole. Detailed Implementation

[0050] like Figures 1 to 10 As shown, several embodiments of the technical solution of the present invention are as follows: Example 1 (Controllable DC water output) A posterior capsule polishing device for cataract surgery includes a main unit and an operating unit. The operating unit includes a pen-type brush 1. The head (i.e., the pen tip) of the pen-type brush 1 is provided with a syringe needle 2, and the pen-type brush 1 is provided with a water supply pipe 21. One end of the water supply pipe 21 is connected to the syringe needle 2, and the other end is located at the tail of the pen-type brush 1. The pen-type brush 1 is designed with anti-slip texture 4.

[0051] The main unit includes a control unit and a water supply unit. The water supply unit includes a water tank 10 for holding physiological saline and a water pump 17 for providing power to the physiological saline. The water outlet pipe 8 of the water pump 17 is located at the tail of the pen-type flusher 1 and is connected to the water delivery pipe 21 of the pen-type flusher 1. The water supply end also includes a saline bottle 11 and a sterile interface 12 for achieving a detachable and sealed connection between the saline bottle 11 and the water tank 10. The sealing and sterility of the sterile interface effectively prevents external environmental microorganisms from entering the saline delivery path, avoiding contamination of the saline during replenishment and ensuring the sterility of the saline used in surgery. The control terminal includes a control circuit board 15, which has a water supply signal output terminal. This output terminal is electrically connected to the control terminal of the water pump 17 at the water supply terminal via a signal line 7. The water supply signal input terminal of the control circuit board 15 is electrically connected to the flow rate control button 5 on the pen-type flushing device 1, allowing the operator to adjust the multiple flow rates of the saline solution ejected from the syringe needle 2 with one hand during cataract surgery. This invention, through the flow rate control button equipped with a pen-type flusher, allows operators to customize the flow rate of each setting through the equipment control system to meet the rinsing needs of different residual leather. Combined with the stable output of the water pump, it completely replaces the manual control of the traditional hand-pressed syringe and avoids flow rate fluctuations.

[0052] It is worth noting that in this embodiment, the water pump 17 is located inside the water supply housing. During use, the saline solution in the saline bottle 11 flows directionally into the water tank 10 through the sterile interface 12, continuously replenishing the water tank 10 with saline solution, so that the pump pipe 16 of the water pump 17 is submerged in the saline solution in the water tank 10. At this time, the water pump 17 starts, stably extracting the saline solution stored in the water tank 10 and supplying it to the pen-type flushing device 1.

[0053] Operators can operate the device via the LCD screen 9 located on the outside of the main unit (LCD screen 9 is a touch control screen), such as customizing multiple flow rates and displaying real-time status information, including real-time water flow rate, real-time polishing head pressure value, real-time water tank level, and custom settings, allowing doctors to intuitively control the operation rhythm and further improving the accuracy of water flow control.

[0054] Example 2 (Controllable mechanical polishing + DC water output) Based on Embodiment 1, the pen-type flusher 1 is further provided with a miniature brushless motor 13 inside the front end. The motor shaft of the miniature brushless motor 13 is a hollow motor shaft 19. The hollow motor shaft 19 extends out of the front end of the pen-type flusher 1 and is fixedly connected to the syringe needle 2. The water supply pipe 21 of the pen-type flusher 1 passes through the hollow motor shaft 19 and communicates with the syringe needle 2. The tip of the syringe needle 2 is provided with a polishing head 3. The polishing head 3 is provided with a guide hole 24 for water outlet. The outer surface of the polishing head 3 is provided with a protrusion 22 for mechanical polishing. The control circuit board 15 also has a rotation signal output terminal, which is electrically connected to the control terminal of the miniature brushless motor 13. The rotation signal input terminal of the control circuit board 15 is connected to the rotation control button 6 on the pen-type brusher 1, which is used by the operator to control the rotation speed of the polishing head 3 during cataract surgery. For example, switching between low-speed, medium-speed, and high-speed rotation gears of the miniature brushless motor 13.

[0055] It is worth noting that in this embodiment, the syringe needle 2 also includes a needle shaft 18 and a needle seat 20. The needle seat 20 is disposed at one end of the needle shaft 18 and is used to sleeve onto the hollow motor shaft 19, so that the syringe needle 2 is fixedly connected to the hollow motor shaft 19. The other end of the needle shaft 18 is provided with a polishing head mounting post 23. The polishing head 3 is circumferentially fixed on the polishing head mounting post 23 (hollow post), and the guide holes 24 inside the polishing head 3 are all connected to the needle shaft 18. In this way, the rotational force of the micro brushless motor 13 can be transmitted from the hollow motor shaft 19 to the needle seat 20 and the needle shaft 18, and finally make the polishing head 3 rotate. At the same time, the saline solution can also be smoothly ejected from the guide holes 24 of the polishing head 3.

[0056] Example 3 (Controllable spiral water flow output) Because the shear force of direct water flow is weak and its rinsing coverage is limited, it has poor ability to peel off residual cortex, making it difficult to completely remove tightly attached or scattered cortex, which can easily create a risk for secondary cataracts. Therefore, we have made further improvements based on Example 2: The polishing head 3 on the syringe needle 2 has multiple guide holes 24 (e.g., 3) evenly distributed. The outlets of these guide holes 24 are evenly distributed around the water outlet end face of the polishing head 3. The polishing head 3 is rotated by the micro brushless motor 13, so that the saline solution ejected by the polishing head 3 forms a spiral water flow with the rotation of the polishing head 3, so as to ensure that the rinsing force is uniform during the polishing process.

[0057] Note that the syringe needle 2 in Examples 1, 2, and 3 can only be a straight needle.

[0058] Example 4 (Gentle spiral water flow output) Based on embodiment 3, the syringe needle 2 is a straight needle or a curved needle, and the polishing head 3 is loosely fitted at the tip of the syringe needle 2 (that is, the polishing head 3 is rotatably fitted at the tip of the syringe needle 2), and the guide hole 24 of the polishing head 3 extends in a spiral shape inside the polishing head 3.

[0059] In this embodiment, the tip of the syringe needle 2 is provided with a polishing head mounting post 23, while the interior of the polishing head 3 is provided with a polishing head rotation fitting hole 25. The polishing head 3 is loosely fitted onto the syringe needle 2, which means that the polishing head mounting post 23 is rotatably mounted in the polishing head rotation fitting hole 25. If the polishing head mounting post 23 is regarded as a structure similar to a "shaft", the polishing head rotation fitting hole 25 provided in the space at the tail of the polishing head is the part that mates with the "shaft" (polishing head mounting post 23) and allows rotation, similar to the fitting relationship between a "shoulder sleeve" and a "shaft" in machinery. In practical applications, in order to make the rotation of the polishing head 3 smoother, a miniature ball bearing can even be provided between the polishing head mounting post 23 and the polishing head rotation fitting hole 25.

[0060] This structure utilizes the water flow force generated when saline flows through the drainage hole to directly drive the polishing head 3 to rotate around the syringe needle 2, thereby achieving mechanical polishing through the protrusions 22 on the outer surface of the polishing head 3. At the same time, it can also use a gentler spiral water flow for rinsing. This method does not require additional active drive from the micro brushless motor 13. The polishing and rinsing intensity can be adjusted solely by the water flow rate. It is gentler when applied to the posterior capsule and can accurately meet the needs of removing moderately stubborn cortical tissue, avoiding excessive manipulation that could damage the tissue.

[0061] It should be noted that in this embodiment, the outlet of the guide hole 24 of the polishing head 3 must be located around the water outlet end face of the polishing head 3, and not at the center of the end face. If the outlet of the guide hole is located at the center of the end face, the saline solution will only form a single-direction direct current when ejected, and cannot form a spiral water flow by means of the rotation of the polishing head 3 (or the guiding effect of the water flow itself through the spiral groove hole). Therefore, the function of "gentle water flow rinsing and gentle mechanical polishing in synergy" cannot be achieved, nor can the effect of uniformly covering the polishing area and efficiently removing debris be achieved. Therefore, this embodiment can only be implemented based on embodiment 3.

[0062] Example 5 (Pressure Monitoring) Based on embodiment 4, the outer wall of the miniature brushless motor 13 of the pen-type brusher 1 slides against the inner wall of the pen-type brusher 1. A pressure sensor 14 is abutted against the tail of the miniature brushless motor 13. The pressure sensor 14 has a circular hole in the middle to make way for the water supply pipe 21 of the pen-type brusher 1. The water supply pipe 21 of the pen-type brusher 1 passes through the circular hole and communicates with the syringe needle 2. In this way, when the polishing head 3 is subjected to pressure, the pressure is transmitted through the syringe needle 2 to the hollow motor shaft 19 of the miniature brushless motor 13, and then to the body of the miniature brushless motor 13, causing the miniature brushless motor 13 to squeeze the pressure sensor 14. The pressure sensor 14 collects the pressure signal in real time and transmits it to the control circuit board 15 and the LCD screen 9 for water flow and motor control, as well as for display to the operator.

[0063] In other words, the high-precision pressure sensor installed at the front end of the pen-type flushing device in this embodiment can monitor the force applied by the polishing head to the posterior capsule in real time. This design enables a variety of functions that greatly improve surgical outcomes and efficiency. For example, an LCD screen can be installed on the pen tip or the main unit to display the pressure, and multiple pressure thresholds can be set. When the force exceeds the limit, not only will an audible and visual alarm be triggered to promptly remind the doctor to avoid excessive contact, but the device will also automatically cut off the power and water supply, or reduce the water flow / motor speed, etc.

[0064] In practical applications, the posterior capsule polishing device produced is a combination of the five embodiments described above. This allows operators to perform corresponding operations according to different scenario requirements, maximizing the device's adaptability. For example, for initial cleaning scenarios, direct current or spiral water flow polishing can be used to avoid excessive operation and tissue damage; for stubborn lens epithelial cell residue scenarios, physical rotational polishing can be switched to enhance the mechanical removal effect; for scenarios requiring deep cleaning and preventing debris residue, a curved needle head can be switched, and the motor speed can be reduced to zero, using a gentler spiral water flow for polishing to improve cleaning thoroughness.

[0065] In summary, the safety, adequacy, and efficiency of posterior capsular polishing directly affect the fit between the intraocular lens and the capsular region, thereby determining the effectiveness of postoperative complication control. Therefore, the posterior capsular polishing device described in this invention represents a significant improvement over traditional posterior capsular polishing techniques and is of great importance in enhancing the quality of cataract surgery.

[0066] The integrated posterior capsule polishing technology solution developed in this invention, which combines "precise speed control + stable operation + multi-mode polishing + safety monitoring", solves the pain points of traditional technologies such as uncontrollable flow rate, easy operation tremors, difficulty in cleaning stubborn cortex, and lack of safety warnings. At the same time, it takes into account surgical efficiency and aseptic requirements, making it the best choice for current cataract surgery auxiliary equipment.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications made to the present invention by those skilled in the art without departing from the spirit of the present invention shall fall within the protection scope of the present invention.

Claims

1. A posterior capsule polishing device for use in cataract surgery, characterized in that, Includes a host end and an operation end. The operation end includes a pen-type flusher (1). The head of the pen-type flusher (1) is provided with a syringe needle (2), and the pen-type flusher (1) is provided with a water supply pipe (21). One end of the water supply pipe (21) is connected to the syringe needle (2), and the other end is located at the tail of the pen-type flusher (1). The main unit includes a control unit and a water supply unit. The water supply unit includes a water tank (10) for holding physiological saline and a water pump (17) for providing power to the physiological saline. The outlet pipe (8) of the water pump (17) is located at the tail of the pen-type flusher (1) and is connected to the water delivery pipe (21) of the pen-type flusher (1). The control terminal includes a control circuit board (15), which has a water supply signal output terminal that is electrically connected to the control terminal of the water pump (17). The water supply signal input terminal of the control circuit board (15) is electrically connected to the flow rate control button (5) on the pen-type flusher (1), which is used by the operator to control the flow rate of saline from the syringe needle (2) with one hand during cataract surgery.

2. The posterior capsule polishing apparatus according to claim 1, characterized in that, The pen-type flusher (1) is also equipped with a miniature brushless motor (13) inside the front end. The motor shaft of the miniature brushless motor (13) is a hollow motor shaft (19). The hollow motor shaft (19) extends out of the front end of the pen-type flusher (1) and is fixedly connected to the syringe needle (2). The water supply pipe (21) of the pen-type flusher (1) passes through the hollow motor shaft (19) and communicates with the syringe needle (2). The tip of the syringe needle (2) is equipped with a polishing head (3). The polishing head (3) is equipped with a guide hole for water outlet. The outer surface of the polishing head (3) is equipped with a protrusion (22) for mechanical polishing. The control circuit board (15) is also provided with a rotation signal output terminal, which is electrically connected to the control terminal of the micro brushless motor (13). The rotation signal input terminal of the control circuit board (15) is connected to the rotation control button (6) provided on the pen brush (1), which is used by the operator to control the rotation speed of the polishing head (3) during the cataract treatment surgery.

3. The posterior capsule polishing apparatus according to claim 2, characterized in that, The outlet of the guide hole of the polishing head (3) on the syringe needle (2) is set around the water outlet end face of the polishing head (3), so that the saline solution ejected by the polishing head (3) forms a spiral water flow as the polishing head (3) rotates.

4. The posterior capsule polishing apparatus according to claim 3, characterized in that, There are multiple guide holes around the water outlet end face of the polishing head (3), and they are evenly distributed.

5. The posterior capsule polishing apparatus according to claim 2, characterized in that, The syringe needle (2) is a straight needle or a curved needle. The polishing head (3) is loosely fitted at the tip of the syringe needle (2), and the guide hole of the polishing head (3) extends in a spiral shape inside the polishing head (3).

6. The posterior capsule polishing apparatus according to claim 2 or 3, characterized in that, The outer wall of the miniature brushless motor (13) of the pen-type brusher (1) slides with the inner wall of the pen-type brusher (1). A pressure sensor (14) is abutted at the tail of the miniature brushless motor (13). The pressure sensor (14) has a round hole in the middle for making way for the water supply pipe (21) of the pen-type brusher (1). The water supply pipe (21) of the pen-type brusher (1) passes through the round hole and communicates with the syringe needle (2).

7. The posterior capsule polishing apparatus according to claim 3, characterized in that, The pen-type brush (1) has an anti-slip texture (4) on its exterior.

8. The posterior capsule polishing apparatus according to claim 2, characterized in that, The rotary control button (6) is used to switch the speed of the motor rotation.

9. The posterior capsule polishing apparatus according to claim 1, characterized in that, The flow rate control button (5) is used to control multiple flow rates of water, which can be customized through an LCD screen (9).

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