DE2363192A1 - ULTRASONIC DEVICE FOR EYE SURGERY - Google Patents

Description

■■ '· ■ Γ-.f;

1-Mikhail M. Krasnov ^{ρ 54 715}

2. VjaSeslav E. Bocarov

3. Irina P. Golyamina

4. Vladimir I. Kovalkov

2. VjaSeslav E. Bocarov ~

3. Irina P. Goljamina ¹⁹ · ^Dec · ^{1s /: f}

L / Br Moscow / USSR

GSRiI PURE TO EYE SURGERY

The present invention relates to surgical devices and refers to eye surgery, particularly ultrasound equipment for eye surgery.

The present device is ^designed for performing various operations in ophthalmology: all variants of bacryoeystorhinostomy, reselction of the orbital wall, operations related to glaucoma, secondary cataracts, detachment of the retina and the like.

Various types of devices are used in ophthalmic surgery to make cuts · They are all rod-shaped and terminate with an effective end piece that is tapered as required. The ineffective part of the device leaves

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to place oneself in the hand of the Ch.iiur.gen, de en power through, the device is transferred to the tissue for its cutting. Here the force turns out to be quite great and effective excessive trauma to those adjacent to the cut zone Tissues

The devices are also widely used in eye surgery for coagulation of the eye skin with the help of high-frequency currents, i.e. by means of diathermocoagulation. With these. one of the electrodes of an electrical circuit fed by a high-frequency generator occurs as an effective end piece on. Disadvantages of diathermocoagulation are excessive inflammation and partial death (Uecrosis) of the eye skin at the point of coagulation.

In eye surgery, an ultrasonic device for coagulation of the eyeball is known which is composed of a Eesonanz- -Ultraschallwandler of electrical oscillations into mechanical, which is electrically coupled to a generator and mechanically contacted with a • Kesonanzwellenleiter concentrator ^m i * an effective tail . All these ropes are in one in the form of a rod-shaped «! Hand tool designed housing included. A similar device is described, for example, in a contribution by DB Karlin in "American Journal of Ophthalmology", 68, NI (1969), pages 84 to 91. A core laminated from nickel plates is used as the ultrasonic transducer.

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Head concentrator with the effective end piece is rigidly coupled to the converter. There is one used to derive an im Converters developed excess heat required water cooling system. The resonance vibrations of the transducer are generated by a generator flowing through its winding Alternating current excited. . The generator provides a conventional, is a push-pull amplifier fed by any known alternating current generator, the frequency of which is adjusted to resonance of the converter is tuned by hand. It is worked in the permanent oscillation state. By winding the In addition to the alternating current, the converter has a bias -Direct current, the source of which is an additional part of the generator.

The device mentioned has a number of disadvantages. Thus, the water cooling of the converter makes it necessary to increase the size of the device and complicates it Construction. The oversizing of the device makes it difficult the surgeon to perform microsurgical operations while the presence of the water pipes the possibility limited by manipulation. The increase in the size of the device and the complication of the generator also arise from the need to apply the bias current. As a result of a relatively high Impedance of the converter, its supply voltage is not high,

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which in turn creates special protection for requires the surgeon. The one-piece vibration system (Transducer 7 / waveguide end piece) robs the surgeon of oils To change the shape of the effective end piece, to replace it when it is worn, the gain factor for the amplitude of the waveguide concentrator to vary, The thermal effect, which the ultrasound always has during coagulation of the eye skin, has an extremely disadvantageous effect Accompanied # -This by heating the end piece and the adjacent tissue layers due to a dissipation of the ultrasonic energy-induced effect occurs despite the water cooling of the converter in appearance, the implementation of the operations is made possible by the need to tune the generator on the resonance frequency of the vibration system, which is under the influence of the acoustic load and the heating changes · If there is a need for a short-term Application of the ultrasound makes it difficult to precisely dose the effect »

The purpose of the present invention is to overcome the disadvantages mentioned above.

The present invention has for its object to provide an ultrasound apparatus for ophthalmic surgery, which has such a set of features relating to the execution of its components, which makes it possible overheating at the point of exposure of the device to

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to eliminate the eye, the short-term exposure to exactly dose to simplify the construction and the dimensions to reduce the size of the device, to improve occupational safety when handling it during the execution of the operations, to enable its use in various operations, namely: in the dacryocystorhinostomy, a resection the orbital wall, in those associated with glaucoma Operations, secondary cataract, retinal detachment, the surgeon (or his assistant) the Necessity to control the operating condition of the generator to save during the operation »

This task is achieved in that in the ultrasonic device according to the invention for eye surgery in the form of a rod-shaped hand tool, in which a resonance ultrasonic transducer of electrical vibrations in mechanical in the form of a core with an excitation winding is housed in the housing of the ultrasonic head, which is electrically coupled to a generator and mechanically ontact with one end of the main waveguide concentrator and the effective end piece _K. stands, the following totality of sow elements

The generator contains a pulse modulator and a self-excited generator with a current feedback that is applied to the excitation winding of the resonance ultrasonic transducer are connected in such a way that an operating state of the device with high amplitudes of ultra-short pulses

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as well as an automatic adjustment of the generator to a,

Resonance can be guaranteed with changing loads, [

while the core of the transducer is made of a magnetostrictive ferrite is carried out and has inserts placed directly at its ends in the form of permanent magnets, and in the housing an additional resonance waveguide concentration

fofPo ⁵ Ir ^{1631 is / has the} required amplification factor

¹ den -

and its a ^e lnde is coupled by means of a screw connection to the second end of the main waveguide concentrator, wherein the second projecting from the body of the head end of the additional wavelength eit he concentrator in the form of an effective end piece has.

For cutting the bone tissue of the eye socket, the additional waveguide concentrator can be an exponential one Have shape, and to improve the cutting quality of the device, the effective end piece must be in the form of an operating bakryocystorhinostomy and resection of bone tissue the eye socket provided saw.

For the production of a chorioretinal connection in the case of a detachment of the retina, it makes sense that the additional Waveguide concentrator has a Gaussian shape and the effective end piece in the form of a for operation because of the Retinal detachment provided sphere is executed.

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_N for performing operations in a secondary glaucoma and cataracts, it is useful that the additional waveguide concentrator having a expotentielle, katenoidale or (iaußsche shape and the effective Bndstück in shape is performed a needle.

For phacoemulsification during operations because of the

It is beneficial when cataracts. 3 additional shaft ends it he concentrator has a two-stage form, wherein

Each stage is designed in the form of equiaxed circular cylinders, the diameter of which, starting at the main waveguide r-concentrator, decreases, _un ^ 'in the axial direction of the second stage, a channel is executed, which has an output on the outer cylinder surface in the zone of an assembly for shifts comprising the additional waveguide concentrator, and the effective end piece in the form of i carried out one for the operations of a Phakoemulsif ication provided, communicating with the channel of the last stage Eohres having a tapered end and a lumen _s t, where the end of the Eohres for shredding and emulsifying the lens of the eye, while the channel and the cavity are provided for the continuous introduction of a liquid into the outer chamber of the eye for the filling thereof and for the rinsing out of the lens masses.

Such an embodiment of an ultrasound device for eye surgery, namely using a generator Pulse modulator, gives the possibility to use the device in

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Driven to work by ultra-short pulses with a high amplitude, which occur as single pulses as well as pulses with a repetition frequency of 1 / s. Such an operation makes it possible to obtain a sufficient degree of coagulation for the eye skin with minimal heat generation, which drastically reduces the burn reaction of the eye skin at the coagulation site, the degree of the action of the ultrasound being independent of the compressive force of the device in relation to the sclera. Uninterrupted operation of the generator is also provided. The current feedback ensures that the generator's frequency is automatically matched to the variable resonance frequency of the oscillating system, which saves the surgeon the need to monitor the operation of the device. The use of a magnetostrictive ferrite as the material for the core of the ultrasonic transducer leads to an increase in the efficiency of the transducer and a reduction in its impedance _} which in turn allows water cooling to be abandoned, thereby simplifying the construction of the device and reducing its dimensions, thereby reducing manipulation with this is facilitated, as well as to lower the supply voltage for the device noticeably and to make it safer in this way. The inserts in the form of permanent magnets in the ferrite core dispense with the use of a gate magnetization direct current, which simplifies the generator circuit and meets the requirements.

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loosened on the winding of the transducer · The use of the additional detachable waveguide concentrator with the required effective end piece allows the device to be used for various eye operations - dacryocystorhinostomy, Resection of the ocular wall of the eye, operations

and

Use set skin detachment for "glaucoma, cataracts" and replace it when worn. This additional waveguide concentrator enables the overall gain factor for the amplitude to be increased. The selection of the form of the former corresponds to the conditions / various operations in relation to the required vibration amplitude, the influence of the acoustic load, the ratio of longitudinal to transverse vibrations (maintaining longitudinal stability). The shape of the effective end piece corresponds directly to the tasks of an operation, namely, the incision, the tissue coagulation, the action on localized areas of tissue, the comminution and rinsing of the lens of the eye.

The invention is described below with reference to the description

i of exemplary embodiments as well as the enclosed

Drawings explained in more detail. Eg shows:

1 shows the block diagram of an ultrasound device according to the invention for eye surgery;

Fig * 2 the inventive ultrasound device for the eye

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in
surgery oiine generator general view;

2 shows the same in longitudinal section;

Pig. 4- the additional waveguide concentrator of the

in the device according to the invention according to Fig.l and 2 exponential form

with a .Endstück in the form of a saw in partially cut Opinion,

Fig. 5 dsB. additional waveguide concentrator of the device according to the invention according to FIGS. 1 and 2 Gaussian shape with an end piece in the form of a sphere _{in a} partially sectioned view,

6 shows the additional waveguide concentrator in a catenoidal manner Shape with an end piece in the form of a! Rebuke

in partially sectioned view,

Fig. 7 shows the additional waveguide concentrate or more exponentially Shape with an end piece in the shape of a needle

in a partially cut view,

8 shows the additional Gaussian waveguide concentrator Shape with an end piece in the shape of a needle

in partially sectioned view,

9 shows the additional waveguide concentrator in a stepwise form with an inner channel and an end piece in the form of a hollow tube in ^a longitudinal section;

10 shows the ultrasonic transducer of the invention Device according to Fig. 1 and 2 with an end piece made of a magneto-

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strict ferrite with inserts in the form of permanent magnets C as a whole);

11 shows the basic circuit of the generator according to FIG FIG. 12 shows the overall view of the generator according to FIG. 1.

The } ultrasound device for eye surgery

in the form of a rod-shaped hand tool contains one with an ultrasound head 1 electrically coupled to a generator 2 (FIG. 1). In the housing 5 (Fig. 2) of the ultrasound head 1 are Openings 4 carried out for cooling. The housing 5 has a connected to this by means of very cave connections 5 and 6 Front part 7 or rear part in the form of a cover 8.

In the housing 3 (Fig. 3) of the ultrasound head 1 is a Resonans ultrasonic waveform of electrical oscillations in mechanical, the electrical with the generator 2 (Fig.l) with the help a cable IO (FIG. 3) sealed in an opening of the cover 8 by means of a rubber liner 11 and coupled

mechanically brought to one end of the transition (main) waveguide
-Concentrator 12 contact,. will. The transition waveguide

-Concentrator 12 is connected to the housing 3 by means of a rubber seal $ 1 in the assembly for shifts the waveguide concentrate ors 12 connected, made of a titanium alloy, has an exponential shape and a half-wavelength and is at its second end by means of a screw

to the
identified compound 14 at one end of said additional resonant waveguide concentrate ors fixed 15, which made of a titanium alloy ISTF ^ twa a half-wave length and ^de ™ ER

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has necessary gain factor for the implitude. The second end protruding from the housing 5 of the head 1 of the additional waveguide concentrator 15 has the shape of an effective end piece 16 »The additional waveguide -Concentrator 15 (Fig. 5 and 4) has the described Variant an exponential shape with an effective tail 16 in the form of a saw and is used to carry out Operations on the bone tissue of the eye socket are planned.

The addition © used for conducting operations at yuetz skin reading Delta and glaucoma surgeries optic concentrator 1? (Figo 5) has a Gaussian form j where. the effective collar 18 is guided in the form of a sphere intended to maintain an ohorioretinal connection when reading the retina

In some types of ion Glaukomoperat as well as in the operations due © ines secondary cataract © the additional waveguide concentrator eist 19 (FIG _o 6) has a shape katenoidale ₉ ._._ "lestalt the effective end piece 20 in (a

as a singriff in a 2rabecular zone in ^ 7 operations

/ Glaucoma and for cutting through secondary cataracts provided Hadel is executed * For glaucoma operations as well as for the operations because of the secondary cataract, an additional waveguide concentrator 21 (Fig. 2) exponent in the 11th form with an effective end piece 22 in the form of a needle Glaucoma surgery an additional Weiienleiter concentrator

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23 (Fig. 8) Gaussian shape with an effective end piece 24 used in the form of a needle

For phacoemulsification during operations because of Cataract exhibits the additional waveguide concentrator 25 (Fig. 9) has a two-stage shape, each of which Stage in the form of two equiaxed circular cylinders 26 and is executed, the diameter of which, starting with the transition waveguide concentrate or 12 »(Fig.3) decreases. In the cylinder 27 (Fig. 9), a channel 28 is executed in the axial direction, the an output on the outer cylindrical surface of cylinder 26 in the assembly for displacements of the waveguide concentrator 25 has. The effective end piece 29 is generally in the form of a drill executed with a beveled end 30, the cavity 31 is connected to the channel 28. At the end of 30 years of drilling serves to crush and embed the lens of the eye while the channel 28 and the cavity 31 for continuous introduction a liquid into the Yorderkaimer of the eye for the purpose of their filling and rinsing of eye lens masses provided are. At the point of the exit of the channel 28 on the surface of the cylinder 26 there is a nozzle 32 for Connection of a hose supplying the liquid, which, for the sake of clarity, is ■: in

the drawing is not shown.

The core 33 (Fig. 10) of the resonance ultrasonic transducer is in all of the design variants described above

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of the device for performing all of the above operations is made of a magnetostrictive ferrite and has inserts in the form of permanent magnets 34 located directly at its ends. An excitation winding 35 is wound onto the core 33.

The generator 2 (Fig. 1) includes a supply part, the outputs of which are connected to a self-excited generator 37 and a pulse modulator 38 connected to the winding 35 Qj'ig.llJues converter 9 with the help of the cable via a to the _operator ^light aÖ £ §ui | ln ^{d designed} in the form of a foot lever switch 39 of the ultrasound head 1 are coupled.

The primary winding 40 of the power transformer of the Feed part 36 is via a common switch 41 and one Fuse 42 connected to the AC mains. The secondary winding 43 of the power transformer becomes the tube heater in the self-energized generator 37, the taps are used the secondary winding 44 are connected to a changeover switch 45 used to regulate the amplitude of the device a semiconductor rectifier 46 connected in a bridge circuit, the anodes of the pentodes 47 (drilling) of the self-excited generator 37 and, via a filter 48, the shields feeds these tubes. The secondary circuit 49 of the power transformer is connected to a rectifier diode 50, of which via a switch 51 of the modulator 38 the Collectors of the transistors 52 of the modulator 38 fed

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will.

The self-excited generator 37 is designed in a second act circuit with pentodes 47, the anodes of which are coupled to two taps of the primary winding 53 of the output transformer, the secondary winding 54 of which via the contacts of a relay 33 to a plug 5 & to connect the with the excitation winding 35 of the in Fig 11 ultrasound head 1 coupled cable 10 is switched on. A matching capacitance is connected in parallel to winding 35, which compensates for the inductance of the head. The secondary winding 59 of the stepping transformer forms a circuit with a variable capacitance 6, the frequency of which is tuned to the oscillation resonance of the ultrasound head 1. A voting indicator is indicated by the reference numeral 61. The grid circle is connected to the grid of the pentodes 47 via coupling capacitors 62.

The pulse modulator 38 includes one with transistors 52 equipped multivibrator. A resistor set 63 as well as a Changeover switches 64 make it possible to regulate the current pulse duration in the collector circuits of the transistors. In the collector circuit one of the transistors is the coil of the relay 55, via which the excitation winding 35 is connected to the output of the self-excited Generator 37 is connected. In the circuit of the

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Pulse modulator 38 go aaeh, capacitors 65 and a resistor 66 a «

A filter capacitance 67 is located parallel to the pulse modulator 38. The filter 48 includes a capacitance 68 and a capacitance Resistor 69 on «in circuit of rectifier 4-6 a capacity 70 «

In Fig. 11, resistors 71 appear as lead resistors the grid of the pentodes 47 on «In Kelh © with the Indicators 61 are a semiconductor diode 72 and a resistor 73 «,

On the front panel of the generator 2 (Fig. "12) there is a Stecfcsr 56 for jtasehluß ines © with the ultrasonic probe 1 connected to the cable 10 (Figo H) _9, a toggle switch 74 (Figo 12) of the common switch 41 (Fig« Xl) ₈ A toggle switch 75 (Fig. 12) of the switch 51 (Fig. 11) of the modulator 38 (Fig. 11) is a button 76 (Fig. 12) of the variable capacitance 60 (Fig. H) ₅ © In the tuning indicator 61 (Fig. 12) ), a handle 77 (Fig * 12) of the switch 45 (Figo U), a handle 78 (Pig12) of the switch 64 (Pig.11) of the modulator 38 *

The preparation of the ultrasonic device according to the invention for ophthalmic surgery ^{u nd} its operation and in the operations - proceed as follows, see

Depending on ^ oa. the type of surgery will be sent to the Transition waveguide concentrator 12 (Fig. 3) of the ultra

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schalliopfes 1 by means of a screw connection 14- the respective additional waveguide concentrator with dsm required effective end piece according to FIGS. 4 to 9 tightly connected. The generator 2 is switched on with the help of the toggle switch *}% (Pig · 12) and the required amplitude value is set within the limits of 50 to 100 µm by means of the handle 77. In dependence of. the type of operation is activated by means of toggle switch 75. Impulse or continuous operation set. In pulse mode, the selected pulse duration is set from 0.05 to 0.8 s using handle 78. The pulse repetition rate is equal to l / s. By using the switch 39 (Pig.11) in the form of a foot lever, the ultrasound head 1,. is closed, the generator 2 (Pig 11) is set to the resonance frequency of the ultrasound head 1 (from 25 to 100 kHz) according to the indicator 61 by turning the handle 76 (Fig. 12). With such a setting, the current in the excitation winding of the ultrasound head Γ has a maximum value, and the feedback signal supplied from winding 54 of the output transformer to winding 58 of the Metz transformer of the self-excited generator 37 proves to be sufficient for maintaining the self-winding state. The change in the resonance frequency of the head 1 in a narrow band (of + 0.5%) due to a change in the reactive component of the acoustic load causes a change in the self-oscillation frequency when an operation is performed, whereby

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the self-excited generator 37 is tuned to the resonance of the head «. The alternating current in the winding 35 builds up in the core 33 (Fig. 3) of the transducer 9 from magnetostrictive em ferrite an alternating magnetic field that allows the first-mentioned mechanical longitudinal vibrations with the current frequency to run the polarization effect of the inserts from the permanent magnets 34. The oscillations of the transducer 9 are transmitted to the transition waveguide concentrator 12, which has the same resonance frequency as the transducer 9, and from there to the additional waveguide concentrate or 15 (or 17 »19 _s 21, 23, 25 according to FIG to 9). During the operation, the surgeon makes use of the vibrations of the effective end pieces, which have an amplitude of 5 to 100 µm depending on the choice of the type of additional waveguide concentrator and the setting of the handle 77 (Fig. 12) of the switch 45 ( Fig «ll) have«,

For cutting a bone during the operation of the dacryocystorhinostomy, an additional waveguide concerttrator 15 (FIG. 4) is used in an exponential shape with an effective end piece 16 in the form of a saw®. The operation is uninterrupted, the frequency is 35 to 45 kHz, the amplitude 35 to 50 mim «, Di @ operation proceeds as follows. After infiltration anesthesia with a 2% iJovocaine solution, the ultrasound device is switched on with the aid of a switch 39 (FIG. 11), which is designed in the form of a foot lever, and an incision of 2 to 2 _? 5 cm in length

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all tissue down to the bone along the anterior tear ridge; the incision begins 3 years ago - above the inner ligament of the eyelid. The periosteum and the tear sac were detached in a blunt way. By moving the device back and forth without a bridge, a hole of the required size is cut out in the bone. For this purpose, the bone is first sawed through at the upper and lower border of the bone window, i.e. where the bone is thickest, and then these ⁶ initial saw cuts are connected by an arched saw cut, after which the bone piece is easily removed using a raspatory.

An operation for the detachment of the fetal skin becomes an additional one Waveguide Concentrator 1? (Pig. 5) Gaussian shape with an effective end piece 18 in the shape of a sphere from. 1 mm diameter used. The operation is impulsive with ultra-short pulses, the exact duration of which is set during the operation ©; the frequency is 40 to 45 kHz, the amplitude - 35 mkm. After exposing the sclera at the RiB site according to the generally applicable method, this will be The end piece 18 of the ultrasound device is pressed tightly against the sclera, and the aid of the in the form of a foot lever Switch 39 (Fig. H) turns the device on. On a correct dosage of the ultrasound, i.e. a correct pulse duration, indicate a slight darkening of the sclera and the appearance of a whitish focal point on the retina

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a diameter of ca "1/4 ΈΏο In 'its operation is limited _s of Netzhau.triß be DI® coagulates at a distance of 1 to 2 mm checkerboard pattern applied from one another. In the further course of the operation, the operation in no way deviates from the generally applicable method.

The experimental operations on the rabbits showed the possibility of performing an antiglaucoma operation in the trabecular zone with the help of an additional waveguide concentrator 19 (3Tig »6) catenoidal shape with an effective end piece 20 in the form of an Ifadel« The operation is pulse-like, the pulse duration is 0 ₉ 8 s, the! Frequency - 4 ^ kHz, the amplitude - 60 mknu

After retrobulbar anesthesia with a 2% Kfovocaine solution in an amount of 1.0 ml, akinesia and spibular anesthesia with a 1% Dieaine solution, the reproof of the ultrasound device in the Yord chamber at 6 o'clock in the area of the limbus and up to the upper angle the gate of the chamber led at o'clock. Under the control by means of sines Gonioskops is performed inner Goniotomia that _s if necessary, can be completed by a Goniopunktur.

The experiments also showed that with the same additional Waveguide Concentrator 19 a discourse of the secondary cataract can perform.

For glaucoma operations and operations for secondary cataracts, it is also possible to have an additional

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Lichen Wallenleit it er concentrator 21 (Fig. 7) exponent ie 11 er Form with an end piece in the form of a needle 22 and an additional waveguide concentrator 25 (Fig. 8) Gaussian Form also to be used with an end piece 24 in the form of a reprimand.

The phacoemulsification of the cataract is done with help an additional waveguide concentrator 25 (Fig. 9) two-stage Form with an effective. End piece 29 is the shape of a Pipe. The operation of the ultrasound device is uninterrupted, the frequency is 45 kHz, the oscillation amplitude is up to 50 mkm off. Perform ulbar anesthesia and akinesia after re-trig a 2% hovocaine solution and after epibular anesthesia with a 1% bicaine solution, the gate chamber is opened after the upper limbus cut open. The cutting length is 3 mm. It a preliminary corneal scleral suture is made - basal iridectomy.

The connector 32 of the device is connected to a system for blood transfusion by means of a hose, from which a liquid comes - physiological © solution, which begins to flow out of the channel 28 to the outside. After the front capsule of the eye lens has been opened, the device with its end piece 29 is generally introduced into the Yorderkammer, and a phacoemulsification of the eye lens takes place. The emulsified masses are removed through the cut with the aid of the flow of liquid. The dense part of the nucleus of the eye lens is inserted into the

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Vorderkaramer brought out and also emulsified. Compartment for rinsing out all masses, the seam is tied. The air is introduced into the anterior chamber. Then one will Binocular bandage applied.

The ultrasonic device according to the invention for eye surgery differs advantageously from the existing ones in that, thanks to the pulse operation with high amplitude, it allows the fire reaction in the operations because of the retina reading to reduce abruptly in the antiglaucoma operations. Moreover, the device kleia t handy "^ QQ in question is ¹¹⁶¹¹¹ ^ handling and poses no danger to the surgeon and Crane & Bn because the power supplied to the head of the unit voltage is equal to IO to 12V. The generator has an automatic Srequenzab mood on what saves the surgeon from following the coordination during the operation - thanks to the additional detachable waveguide concentrator, the effective end pieces can be exchanged quickly. "

With the aid of the device according to the invention, over 100 Operations for dacryocystitis performed and 15 people had an operation because of the retinal reading. The result se of the operations turned out well, and all the sick have recovered. The one made on the rabbits experimental operations have the possibility of phacoemulsification shown by cataract and antiglaucoma operations

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Claims (1)

P 54 715 Dec. 19, 1973 L / Br * ο ^ -7 Λ $ D ( 1.) Ultrasonic device for eye surgery in shape a rod-shaped hand tool, in which the housing of the ul- ,,. for conversion,,. ultrasonic head is a resonance ultrasonic transducer of electrical Vibrations in mechanical in the form of a core with an excitation winding is housed, which is connected electrically a generator coupled and mechanically coupled to one end of the resonant main waveguide concentrator with an operative in
End piece Kgntakt stands, thereby marked, ei ch net that "■" ^: the generator (2) <contains) a pulse modulator (38) and a self-excited generator (37) with a current feedback, which are connected to the excitation winding (35) äes resonance ultrasonic transducer (9) in such a way that an operating state of the device with high amplitudes of ultrashort pulses and an automatic adjustment of the generator (2) to a resonance with a variable load are guaranteed that the core ( 33) äes transducer (9) is made of a magnetostrictive ferrite and has inserts in the form of permanent magnets (34) placed directly at its ends, Un ^ ¹ In the housing (3) of the ultrasonic head (9) an additional resonance waveguide concentrator (15 ) is,
Provided that has a required gain factor and one end of which is connected to the second end of the main waveguide concentrator (12) by means of a very screw connection (IA-) 409830/0304 coupled is j where the second * from the housing (3) of the Head Cl) the protruding end of the additional waveguide -Concentrator (15) has the shape of an end piece (16). 2 »· Ultrasound device for eye surgery according to claim characterized in that the additional waveguide concentrator (15) is exponential in shape has, and the effective end piece (16) in the form of a saw provided for cutting the bone tissue of the eye socket is executed " 3 »Ultrasound device for eye surgery according to claim I _9, characterized in that the additional waveguide concentrator (1?) Has a Gaussian shape and the effective end piece (18) is designed in the form of a sphere intended to maintain a chorioretinal connection in the event of detachment of the skin , 4 _O ultrasonic device for Augenehirurgie I according to claim ₉ characterized GEK © nnzeieh'net ₉ that the zusätzlieh © waveguide concentrator (2X ₉ 19, 23) © © ₉ ine exponentially katenoidaL® oü © s GauflsGh having ® shape, and the effective © End piece (22 ^ 2O ₅ 24) in the form of a for intervention in the Srabekülaszoa © during operations TOg @ s of a glaucoma as well as for DypGhselmeiäea. executed by S®koaäärkat ^ 'akt @ a ¥ org @ s®henai Hadel Is © 5ο Ultrasound device for the Augenehirilgi © according to claim Ipäaduroli gekennzeiahnet ^ that the to- ί t 08830/0304 Additional waveguide concentrator (25) has a two-stage form, each stage being designed in the form of equiaxed rice cylinders (26, 27), the diameter of which decreases, starting at the main waveguide concentrator (12), _and in the axial direction of the second stage a channel (28) is executed, - » ^{which has} an exit on the outer cylindrical surface in the zone of an assembly for displacements of the additional waveguide concentrator (25), and that the effective end piece (29) ia, form a for the operation of a phacoemulsification provided, with the channel (28) of the last stage communicating drill with a beveled end (50) and with a cavity ($ 1) is carried out -j whereby the end (50) of the ear is for crushing and emulsification of the The eye lens serves ₉ during the anal (28) and the cavity (51) for an uninterrupted introduction of a liquid into the anterior chamber of the eye for its filling and for the rinsing out of the eye lens mass a, vo are seen. 409830/0304 Leeward