CN1214903A - Cataract ultrasonic emulsifying instrument - Google Patents
Cataract ultrasonic emulsifying instrument Download PDFInfo
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- CN1214903A CN1214903A CN 97119026 CN97119026A CN1214903A CN 1214903 A CN1214903 A CN 1214903A CN 97119026 CN97119026 CN 97119026 CN 97119026 A CN97119026 A CN 97119026A CN 1214903 A CN1214903 A CN 1214903A
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Abstract
The present invention relates to an improvement on ultrasonic emulsifier for cataract, and is characterized by that said invented complete machine adopts a single-chip computer to control liquid-crystal display of Chinese character man-machine interface, and includes a high-efficiency miniature ultrasonic transducer which is connected with a replaceable two-stage stepped variable amplitude and hyperboloid-transient variable amplitude bar (therapeutic needle), an ultrasonic power supply formed from switch power amplification circuit, frequency automatic tracking and constant power control and an injection pumping and backflow protection system formed from peristaltic pump, solenoid valve and vacuity-measuring circuit. Said invention is compact in structure, high in electroacoustic conversion efficiency and intellectualization, stable and reliable in operation and convenient for maintenance.
Description
The invention belongs to ophthalmology microsurgery equipment, relate to a kind of improvement of cataract ultrasonic emulsification instrument and perfect.
The operation principle that ultrasonic emulsification instrument is dispeled cataract tissue is: drive ultrasonic transducer with the power source of ultrasound signal, electric energy is changed into the mechanical energy of the small amplitude of high speed, by the horn cumulative amplitude is amplified again, cataract tissue in the eyeball is produced " cutting effect " and " cavitation effect ", make it broken, emulsifying sucking-off afterwards is external.(cooperate the implantable artificial crystal then, make the patient recover vision).With in the traditional capsule, the outer pioneering operation of capsule compares, the ultrasonic emulsification treatment has that otch is little, post-operative complication reaches advantages such as vision restoration is fast less.This treatment also is applicable to the cataract immature phase, makes the early treatment become possibility.
The existing import of overseas-built cataract ultrasonic emulsification instrument China, the development of China still belongs to blank.Yet there is following shortcoming in external existing cataract ultrasonic emulsification instrument: the adverse effect that at first is " cavitation effect ", because used ultrasonic frequency (about 40kHz) on the low side, uncontrollable " cavitation effect " can cause the disturbance of ophthalmic, make the tissue that has been broken vertically away from operating head, lowered pumping efficiency; The sight line that may block the doctor owing to " cavitation effect " caused bubble influences operation again, and " cavitation effect " also brings power dissipation thereupon.Secondly, the electro-acoustic conversion efficiency of complete machine is on the low side, makes its required electrical power bigger than normal, and improvements are all wanted in the circuit aspect of ultrasonic transducer structure and main frame in the handle.
The objective of the invention is to improve and improve prior art and product, provide a kind of highly effective and safe reliable cataract ultrasonic emulsification instrument.Specifically adopt higher supersonic frequency (50kHz); improve pumping efficiency; improve and improve the design of ultrasonic transducer and control circuit; handle is compact overall structure; the electro-acoustic conversion efficiency height; there is power upscale protection function in the ultrasonic generator system, and injection and suction system have vacuum detecting and back flow protection function.
Cataract ultrasonic emulsification instrument of the present invention is made up of handle and main frame two large divisions.In the said handle ultrasonic transducer is arranged, filling line and aspiration, comprise ultrasonic generator and ultrasonic power upscale protection circuit in the said main frame, improvements of the present invention are that characteristics are that vibration transmission rod and front shroud in the handle is integral, ultrasonic transducer and taper knob are flexible coupling with screw thread and soft washer, aspiration vertically runs through the whole ultrasonic transducer, and the treatment syringe needle of handle front end is that profile is step-like tubulose horn; Said main frame comprises a control display circuit of being made up of single chip machine controlling circuit and liquid crystal display interface; one by said single chip machine controlling circuit peristaltic pump and drive circuit thereof; injection and suction system that injection valve, reflux inlet and drive circuit thereof and vacuum measurement circuit are formed, one by said single chip machine controlling circuit, vacuum measurement circuit and be connected across inject the backflow branch road of controlling by said reflux inlet between path and the suction path forms vacuum detecting and back flow protection system.
The present invention is further detailed explanation below in conjunction with the accompanying drawing illustrated embodiment.
Fig. 1. be operation principle block diagram of the present invention
Fig. 2. be handle arrangement sketch map of the present invention.
Fig. 3. be that the present invention treats the needle head structure sketch map.
Fig. 4. be Single-chip Controlling of the present invention and display circuit.
Fig. 5. be peristaltic pump drive circuit figure of the present invention.
Fig. 6. be electromagnetic valve driver circuit diagram of the present invention.
Fig. 7. be vacuum measurement circuit diagram of the present invention.
Fig. 1 shows that system of the present invention forms the operation principle block diagram of structure.Below in conjunction with Fig. 1 cataract ultrasonic emulsification instrument complete machine composition structure of the present invention is described.It among Fig. 1 host machine part.Host machine part comprises a control display circuit by single chip machine controlling circuit 14 and liquid crystal display interface 13, a ultrasonic generator system 15 that comprises that ultrasonic signal circuit, silicon-controlled voltage regulation circuit, switch power device amplifying circuit, matching network and automatic frequency tracking circuit are formed; An injected system of forming by said single chip machine controlling circuit 14, injection valve 3, injection valve driver 12, three-way device 2 and injection liquid bottle 1; One by single chip machine controlling circuit 14, peristaltic pump 8, catcher 9, three-way device 5 and 6 and the suction system formed of vacuum measurement circuit 7; A back flow protection system that forms by reflux inlet 4 and reflux inlet driver 11, single chip machine controlling circuit 14 and vacuum measurement circuit 7; A ultrasonic power upscale protection circuit (not shown), a foot switch 16 is connected with single chip machine controlling circuit 14.
Shown in Figure 2 is handle 10 structural representations of the present invention.Transducer 100 wherein is power ultrasonic transducers of an efficient miniaturization, its structure is such: front shroud 110 is one with vibration transmission rod 111, vertically run through a hollow aspiration 116, the back segment 117 of front shroud is little than the diameter in stage casing, with back segment 117 on suit dead ring 140, between 130, two piezoceramics crystals 130 of two piezoceramics crystals of suit on the dead ring 140, the positive plate 150 that links to each other with positive pole is arranged again.The front/rear end of two piezoceramics crystals 130 is parallel to each other, and it is vertical with the longitudinal axis of front shroud 110, its front end face is close to the rear end face 115 in front shroud stage casing, rear end face is close to the negative plate 151 that links to each other with negative pole, and with negative plate 151, positive plate 150 and piezoceramics crystal 130 115 are fixed together to back end with back shroud 120; Taper knob is by remote holder sleeve 160, and defensive position sleeve 170 and spacer shell 180 are formed.There is convex shoulder 113 front portion in front shroud 110 stage casings, the front/rear end of this convex shoulder 113 respectively has a soft washer 146 and 145, the soft washer 145 of convex shoulder 113 and front end face thereof is embedded in the front port of remote holder sleeve 160, reuse defensive position sleeve 170 is locked convex shoulders 113 through the soft washer 146 of convex shoulder rear end face, thereby front shroud 110 and remote holder sleeve 160 and defensive position sleeve 170 are fused.Be connected with filling line 161 on the remote holder sleeve 160, an end cap 171 is equipped with in the rear end of defensive position sleeve 170, and aspiration 116 and contact conductor are bored a hole and mistake.The front portion of remote holder sleeve, a protective sleeve 181 is screwed in the leading section of spacer shell 180.
Shown in Figure 3, it is that horn 20 is the ladder tubulose that the present invention treats syringe needle, and active section adopts secondary ladder luffing, the front and back diameter is respectively D1 and D2, and the transition face between the secondary ladder is a hyperboloid 202, that is to say, this curved surface is a hyperbola by the intersection of axis profile.The horn of ladder luffing can obtain maximum amplification when work, make the horn top that enough amplitudes be arranged, and the hyperboloid transition has improved fatigue resistance.For being suitable for different requirements, the treatment syringe needle is that horn top 201 can be made into different angles.Ultrasonic transducer 100 is threaded with horn 20 usefulness, the front end of transducer front shroud 110 is flat screw 112, the flat double-screw bolt 203 of horn rear end is screwed in the said flat screw, and the end face that guarantees the two fits tightly and do not interspace, and vertical with the longitudinal axis of front shroud 110.This syndeton has been eliminated because of existing air-gap to cause the loss that ultrasonic reflections produces.
The work process of cataract ultrasonic emulsification instrument of the present invention is described below in conjunction with Fig. 1.Inject path among the figure, injecting liquid bottle 1 joins by liquid injection pipe and three-way device 2, the input of one termination injection valve 3 of three-way device 2, the other end connects the input of reflux inlet 4, the injection path mouth of the outfan of injection valve 3 and ultrasonic handpiece 10 joins, the control end of reflux inlet 4 and injection valve 3 links to each other with the control signal end of single chip machine controlling circuit 14 with injection valve driver 12 by reflux inlet driver 11 respectively, and single chip machine controlling circuit 14 links to each other with liquid crystal display 13.Injection valve here and reflux inlet can be used electromagnetic valve.When main frame was in function of injecting, single chip machine controlling circuit 14 control reflux inlets 4 cut out, and when foot switch 16 is stepped on, open injection valve 3, implement function of injecting.Injecting the size of flow regulates by regulating the height that injects liquid bottle 1.
In suction channel, with silicon rubber hose one of peristaltic pump 8 is terminated to catcher 9, the other end of peristaltic pump 8 is received an end of three-way device 6, the other end of three-way device 6 is received the joint of the suction path 117 of ultrasonic handpiece 10, the 3rd terminates to an end of three-way device 5, the other end of three-way device 5 links to each other with the outfan of reflux inlet 4, and the 3rd end links to each other with the input of vacuum measurement circuit 7, and single chip machine controlling circuit 14 is received in the measurement output of vacuum measurement circuit 7.When adjusting main frame and being in injections/pumping function, step on foot switch 16, single chip machine controlling circuit 14 control injection valves 3 are opened, and reflux inlet 4 cuts out, and control peristaltic pump 8 simultaneously and form suction according to the flow that sets and move.The liquid that peristaltic pump 8 aspirates out is sent into catcher 9.
The electrode input of the ultrasonic handpiece 10 in the ultrasonic transducer system links to each other with the high frequency outfan of ultrasonic generator 15, the power control input end of ultrasonic generator 15 links to each other with single chip machine controlling circuit 14, be in injection/suction/ultrasound functions when adjusting main frame, when stepping on foot switch 16, single chip machine controlling circuit 14 control ultrasonic generators 15 output ultrasonic powers are to ultrasonic handpiece, implement simultaneously to inject and pumping function, thereby inject simultaneously/aspirate/the ultrasound functions operation, can implement the treatment operation.
In the host machine part of the present invention, injection and suction system and vacuum detecting and back flow protection system are mutually related, and finish jointly that injection, suction, vacuum detect automatically and the back flow protection function, and the work of assurance is safe and reliable.Referring to Fig. 1; the back flow protection circuit is by single chip machine controlling circuit 14; vacuum measurement circuit 7, reflux inlet 4 and injection valve 3 are formed; vacuum measurement circuit 7 is connected with single chip machine controlling circuit 14; three-way device 5 vacuum measurement circuit 7 in the suction path are connected; the backflow branch road that reflux inlet 4 is controlled is connected across and injects between path and the suction path, and promptly the two ends of reflux inlet 4 link to each other with the three-way device 5 of the three-way device 2 that injects path with suction one vacuum measurement path respectively.In the process of vacuuming operation is arranged, the instantaneous vacuum value Pd that single chip machine controlling circuit 14 is measured in the suction path by vacuum measurement circuit 7, and Pd compared with vacuum preset value P0, then with the control signal of comparative result, the opening and closing of control injection valve 3 and reflux inlet 4.If Pd is less than P0, then the closing volume valve 4, and system is in normal operating conditions; If Pd greater than P0, then closes injection valve 3, open reflux inlet 4 simultaneously, the injection path is communicated with suction path, the vacuum in the suction path returns to normal value very soon.Because engine control system of the present invention has this vacuum degree control and back flow protection function, thereby has avoided the danger because of the too high harmed eye tissue of vacuum in the suction path.
The characteristics of host machine part electric wiring of the present invention below are described.
Single-chip Controlling display circuit of the present invention mainly is made up of single chip machine controlling circuit, key control circuit, liquid crystal control display module and controlled quentity controlled variable interface circuit.Its principle is seen accompanying drawing 4: single chip machine controlling circuit 14, peripheral circuit is 32,34,36, is respectively address latch, address decoder and can rewrites program storage device.Button 35 sends control signal to button controller 33, button controller 33, liquid crystal control display module 13, single-chip microcomputer is according to button controller 33 resulting key assignments and the related data (comprising foot switch status signal, vacuum signal, power signal etc.) gathered by controlled quentity controlled variable interface circuit 39, handle the back to the different control signal of complete machine output, send display control module 13 with each demonstration amount simultaneously, show by display 37 at last.
Fig. 5 is peristaltic pump drive circuit figure of the present invention, three tunnel control signal Pa of controlled by single chip microprocessor circuit 14 outputs, Pb, Pc respectively with open-collector reverser U41, U42, the input of U43 links to each other, the outfan of this reverser is connecting resistance R41 respectively, and R42 links to each other with power supply+V41 behind the R43, U41, U42, the outfan of U43 again respectively with resistance R 44, R45, R46 links to each other, R44, R45, the other end of R46 respectively with large power triode BG41, BG42, the base stage of BG43 links to each other, BG41, BG42, the grounded emitter of BG43, colelctor electrode meets diode D41 respectively, and D42 meets power supply+V42 behind the D43, BG41, BG42, the colelctor electrode of BG43 again respectively with the A of motor, B, one end of C three phase windings links to each other, another termination power+V42 of three phase windings.Motor adopts the work of three-phase six-beat system in the embodiment of the invention, generates control impuls and control step motor speed by single chip machine controlling circuit 14, and motor drives Wriggling Pump Head and makes peristaltic pump work.
The injection valve of the embodiment of the invention and reflux inlet adopt the electromagnetic valve of same model.Fig. 6 is a driving circuit for electromagnetic valve of the present invention: the control signal Pe of single chip machine controlling circuit 14 outputs links to each other with the input of open-collector reverser U51, link to each other with power supply+V51 behind the outfan connecting resistance R51 of U51, the outfan connecting resistance R52 of U51, the other end of R52 links to each other with the base stage of large power triode BG51, the grounded emitter of BG51, colelctor electrode meets power supply+V51 after meeting diode D51 respectively, the colelctor electrode of BG51 links to each other with the end of electromagnetic valve winding G, meets power supply+V51 behind the other end connecting resistance R53 of electromagnetic valve winding G.
Fig. 7 is a vacuum measurement circuit of the present invention: wherein operational amplifier adopts two cell modulars, and promptly operational amplifier U61, U62, U63 have A respectively, two groups of identical modules of structure of B.The input in the same way 5 of operational amplifier U63:B is connected with the negative end of resistance R 61 and Zener diode D61, another termination power+V61 of R61, and the other end ground connection of D61, the reverse input end 6 of U63:B links to each other with outfan 7.1 foot of pressure transducer Ps connects the outfan 7 of U63:B, the 3 foot ground connection of Ps, and 2 feet are received the input in the same way 3 of operational amplifier U61:A, are connected resistance R 62 between the reverse input end 2 of U61:A and the outfan 7.4 feet of pressure transducer Ps are received the input in the same way 5 of operational amplifier U61:B, are connected resistance R 63 between the reverse input end 6 of U61:B and the outfan 7.Be connected adjustable resistance KRw between the reverse input end 2 and 6 of operational amplifier U61:A and U61:B.The outfan 1 connecting resistance R64 of operational amplifier U61:A, the reverse input end 2 of another termination operational amplifier U62:A of R64.The outfan 7 connecting resistance R65 of operational amplifier U61:B, the input in the same way 3 of another termination operational amplifier U62:A of resistance R 65, resistance R 66 1 end ground connection, the input in the same way 3 of another termination operational amplifier U62:A.Be connected resistance R 67 between the reverse input end 2 of operational amplifier U62:A and the outfan 1, the outfan 1 of operational amplifier U62:A connects the input in the same way 5 of operational amplifier U62:B, is connected between the reverse input end 6 of operational amplifier U62:B and the outfan 7.The output signal Pd of operational amplifier U62:B is sent to the vacuum measurement end of single chip machine controlling circuit 14, thereby forms the vacuum measurement circuit.
Power upper limit holding circuit among another patent CN1134269A of the power upper limit holding circuit that the present invention is used and the inventor is basic identical.
Through the cataract ultrasonic emulsification instrument of the present invention of Improvement and perfection, has following characteristics and remarkable Effect.
(1) the present invention adopts higher supersonic frequency (50kHz), has reduced emulsion process In " cavitation effect " disturbance of bringing, and increased the cutting effect that instantaneous acceleration is brought, Thereby improved pumping efficiency, also avoided because of " cavitation effect " caused problems.
(2) ultrasonic transducer in the handle of the present invention adopts and tightens rear cover plate structure, and vibration passes Pass bar and front shroud is made of one, no air gap fits tightly between treatment syringe needle and ultrasonic transducer , transducer and taper knob are flexible coupling, and draft tube vertically runs through transducer, thereby ensures high Electro-acoustic conversion efficiency, ultrasonic energy can effectively transmit, and has reduced the heating loss, can Effectively work for a long time.
(3) the ultrasonic power amplifier adopts the Switch power amplifier, has matching network, automatic frequency tracking to close power upper limit control, guarantees that transducer always works in resonant condition, has improved the conversion efficiency of complete machine.
(4) adopt Single-chip Controlling, liquid crystal display Hanzify interface, the vacuum measurement that the ultrasonic generator system closes in the suction system has realized Single-chip Controlling, has improved job stability and reliability.
(5) ultrasonic generator has the power upper limit defencive function, and injection and suction system have self check and back flow protection function, have improved the security reliability of complete machine.
Claims (6)
1. cataract ultrasonic emulsification instrument, form by handle and main frame two large divisions, in the said handle ultrasonic transducer is arranged, filling line and aspiration, said main frame comprises ultrasonic generator and ultrasonic power upscale protection circuit, it is characterized in that vibration transmission rod and the front shroud in the handle is integral, and ultrasonic transducer and taper knob are flexible coupling with screw thread and soft washer, aspiration vertically runs through the whole ultrasonic transducer, and the treatment syringe needle of handle front end is that profile is step-like tubulose horn; Said main frame comprises a control display circuit of being made up of single chip machine controlling circuit and liquid crystal display interface, an injection and a suction system of being made up of said single chip machine controlling circuit, peristaltic pump and drive circuit thereof, injection valve and reflux inlet and driver thereof and vacuum measurement circuit; One by said single chip machine controlling circuit, vacuum measurement circuit and be connected across vacuum detecting and the back flow protection system that the backflow branch road controlled by said reflux inlet between path and the suction path is formed of injecting.
2. cataract ultrasonic emulsification instrument as claimed in claim 1, it is characterized in that the transition face between the treatment wire tip profile ladder of said handle front end is a hyperboloid, the treatment syringe needle is screwed in the flat screw of transducer front shroud front end with the flat double-screw bolt of its back segment, the two fits tightly, and this binding face is vertical with the longitudinal axis of handle front shroud.
3. cataract ultrasonic emulsification instrument as claimed in claim 1, it is characterized in that front shroud 110 and vibration transmission rod 111 are one, vertically run through a hollow aspiration 116, the rear end 117 of front shroud is little than the diameter in stage casing, suit dead ring 140 on back segment 117, two piezoceramics crystals 130 of suit on dead ring 140 again, between two piezoceramics crystals 130 positive plate 150 that links to each other with positive pole is arranged, the front/rear end of two piezoceramics crystals 130 is parallel to each other, and it is vertical with the longitudinal axis of front shroud 110, its front end face is close to the rear end face 115 in front shroud stage casing, rear end face is close to the negative plate 151 that links to each other with negative pole, and with negative plate 151, positive plate 150 and piezoceramics crystal 130 115 are fixed together to back end with back shroud 120; Taper knob is by remote holder sleeve 160, defensive position sleeve 170 and spacer shell 180 are formed, there is convex shoulder 113 front portion in front shroud 110 stage casings, the front/rear end of this convex shoulder 113 respectively has a soft washer 146 and 145, the soft washer 145 of convex shoulder 113 and front end face thereof is embedded in the front port of remote holder sleeve 160, reuse defensive position sleeve 170 is locked convex shoulders 113 through the soft washer 146 of convex shoulder rear end face, thereby front shroud 110 and remote holder sleeve 160 and defensive position sleeve 170 are fused; Be connected with on the remote holder sleeve 160 and inject path 161, there is an end cap 171 rear end of back sleeve 170, and aspiration and contact conductor are bored a hole and mistake, the front portion of remote holder sleeve, and a protective sleeve 181 is screwed in the leading section of spacer shell 180.
4. the described cataract ultrasonic emulsification instrument of claim 1 is characterized in that the three tunnel control signal Pas of peristaltic pump drive circuit by single chip machine controlling circuit 14 outputs, Pb, Pc respectively with open-collector reverser U41, U42, the input of U43 links to each other, and the outfan of this reverser is connecting resistance R41 respectively, R42 links to each other U41 with power supply+V41 behind the R43, U42, the outfan of U43 again respectively with resistance R 44, R45, R46 links to each other, R44, R45, the other end of R46 respectively with large power triode BG41, BG42, the base stage of BG43 links to each other, BG41, BG42, the grounded emitter of BG43, colelctor electrode meets diode D41 respectively, and D42 meets power supply+V42 behind the D43, BG41, BG42, the colelctor electrode of BG43 again respectively with the A of motor, B, one end of C three phase windings links to each other, another termination power+V42 of three phase windings.
5. cataract ultrasonic emulsification instrument as claimed in claim 1 is characterized in that operational amplifier used in the vacuum measurement circuit adopts two cell modulars, and promptly operational amplifier U61, U62, U63 have A respectively, two groups of identical unit modules of structure of B; The input in the same way 5 of operational amplifier U63:B is connected with the negative end of resistance R 61 and Zener diode D61, another termination power+V61 of R61, and the other end ground connection of D61, the reverse input end 6 of U63:B links to each other with outfan 7; 1 foot of pressure transducer Ps connects the outfan 7 of U63:B, the 3 foot ground connection of Ps, and 2 feet are received the input in the same way 3 of operational amplifier U61:A, are connected resistance R 62 between the reverse input end 2 of U61:A and the outfan 7; 4 feet of pressure transducer Ps are received the input in the same way 5 of operational amplifier U61:B, are connected resistance R 63 between the reverse input end 6 of U61:B and the outfan 7; Be connected adjustable resistance KRw between the reverse input end 2 and 6 of operational amplifier U61:A and U61:B; The outfan 1 connecting resistance R64 of operational amplifier U61:A, the reverse input end 2 of another termination operational amplifier U62:A of R64; The outfan 7 connecting resistance R65 of operational amplifier U61:B, the input in the same way 3 of another termination operational amplifier U62:A of resistance R 65, resistance R 66 1 end ground connection, the input in the same way 3 of another termination operational amplifier U62:A; Be connected resistance R 67 between the reverse input end 2 of operational amplifier U62:A and the outfan 1, the outfan 1 of operational amplifier U62:A connects the input in the same way 5 of operational amplifier U62:B, is connected between the reverse input end 6 of operational amplifier U62:B and the outfan 7; The output signal Pd of operational amplifier U62:B is sent to the vacuum measurement end of single chip machine controlling circuit 14.
6. cataract ultrasonic emulsification instrument as claimed in claim 1; it is characterized in that vacuum measurement circuit 7 is connected the input vacuum measurement signal of telecommunication in vacuum detecting and the back flow protection system with single chip machine controlling circuit 14; three-way device 5 in the suction path is connected with vacuum measurement circuit 7 and imports vacuum detection physical quantity signal; the backflow branch road that reflux inlet 4 is controlled is connected across and injects between path and the suction path, and promptly the two ends of reflux inlet 4 link to each other with the three-way device 5 of the three-way device 2 that injects path with suction one vacuum measurement path respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97119026A CN1110292C (en) | 1997-10-16 | 1997-10-16 | Cataract ultrasonic emulsifying instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97119026A CN1110292C (en) | 1997-10-16 | 1997-10-16 | Cataract ultrasonic emulsifying instrument |
Publications (2)
| Publication Number | Publication Date |
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| CN1214903A true CN1214903A (en) | 1999-04-28 |
| CN1110292C CN1110292C (en) | 2003-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97119026A Expired - Fee Related CN1110292C (en) | 1997-10-16 | 1997-10-16 | Cataract ultrasonic emulsifying instrument |
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| CN (1) | CN1110292C (en) |
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| CN101632610B (en) * | 2009-08-06 | 2011-07-06 | 张毓笠 | Intelligent ophthalmic ultrasonic emulsification apparatus |
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| CN101711711A (en) * | 2008-09-30 | 2010-05-26 | 株式会社尼德克 | Ultrasonic operation device |
| CN102215795A (en) * | 2008-11-14 | 2011-10-12 | 博士伦公司 | Ophthalmic surgical cassettes for ophthalmic surgery |
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