CN211213825U - Ultrasonic emulsification handle with sensor and surge control system - Google Patents

Abstract

The utility model discloses a take ultrasonic emulsification handle and surge control system of sensor, the middle suction pipeline of ultrasonic emulsification handle comprises two sections of loose complex: a fixed tube and an extension tube; a small pressure sensor is mounted on the extension tube, but still maintains the size and ultrasonic performance of the handle for ease of use; the design and installation scheme of the extension tube reduces the influence of ultrasonic vibration on the sensor to the maximum extent, and can keep enough rigidity to install and disassemble the super-breast needle head; the design of the handle transducer reduces the impact of such sensor mounting on ultrasonic performance; for phacoemulsification cataract extraction, the distance between the approach pressure sensor and the surgical range provides a technical scheme for reliably controlling surge risk.

Description

Ultrasonic emulsification handle with sensor and surge control system

Technical Field

The utility model relates to the field of medical equipment, in particular to a phacoemulsification handle and a surge control system for phacoemulsification cataract extraction (using an ultrasonic drive needle to break, emulsify and suck diseased intraocular lenses).

Background

Phacoemulsification cataract extraction surgical systems typically consist of three main components: host, phacoemulsification handle, irrigation/aspiration fluid system. A simplified phacoemulsification system, as shown in fig. 1, includes a host 101, a phacoemulsification handpiece 105, and an irrigation/aspiration fluid system. The host 101 provides the driving power and user interface to process the signals from the various units. The irrigation/aspiration fluid system is generally comprised of a motor 102, a fluid cassette 103, and a fluid tube 104, typically having a pressure/vacuum sensor disposed therein to measure the negative pressure in the control aspiration line. In the current conventional design, the pressure/vacuum sensor is mounted on the fluid cartridge 103. The phacoemulsification handpiece 105 is connected to the fluid cartridge 103 through a fluid tube 104, the fluid tube 104 typically being about two meters long. The ultrasonic emulsification handle 105 is connected to the host 101 through a handle cable 106; the handle cable 106 typically contains ultrasonic signal wires therein.

In phacoemulsification surgery, maintaining proper IOP and stabilization of the ocular cavity plays a major role in safety. During normal fluid flow, the volume of perfusate and volume of aspirate entering the ocular cavity are maintained in equilibrium so that the ocular cavity is maintained at a preset IOP value. However, if the superteat needle becomes blocked by tissue fragments, which is a frequent occurrence, a negative pressure builds up in the aspiration line; when the super-nipple head is vibrated by strong suction force or ultrasonic waves, the blocked tissue fragments are broken or removed, and the liquid in the eyes can be quickly sucked away by the established negative pressure; if the volume of fluid withdrawn is greater than the volume of fluid introduced, the intraocular pressure will decrease and the chamber will collapse or even collapse, all in a short instant. This phenomenon is called surging in the operation of the super-mammary cataract, and the fluctuation of the eye cavity caused by the surging makes the operation difficult and even causes the operation complication.

The severity of the surge is mainly affected by the following aspects: the inner diameter of the super-breast needle, the setting of intraocular pressure (IOP), the negative pressure during the removal of congestion, the size and the hardness of a suction pipeline and the like. Generally, small needle bore, high intraocular pressure setting, low vacuum setting, small and stiff aspiration tubing help reduce surge, but these techniques have limitations and respective disadvantages.

Thus, if a situation in which the suction line is suddenly cleared of a jam can be detected in time and the built-up negative pressure is released in time, surges are reduced or even avoided. For currently used phacoemulsification systems, as previously mentioned, the pressure/vacuum sensor is housed in a fluid cartridge that is mounted to the host machine, and a fluid tube that is connected to the phacoemulsification handpiece through a perfusion/suction fluid tube, which is approximately 2 meters long. Because line congestion occurs in the lumen of the eye, such long tubes can cause the detection of a congestion clearing condition to be delayed, such that the delayed signal cannot be used to effectively reduce surging.

On the other hand, the phacoemulsification handle is very close to the eye surgery position; if a small pressure sensor is placed on the suction tube of the phacoemulsification handpiece, a jam clearance condition can be detected in time. However, with currently available phacoemulsification handpieces, the ultrasonic vibrations may affect and even damage the housed pressure sensor, which in turn may degrade the ultrasonic performance of the phacoemulsification handpiece. Patent documents US20180049920a1 and US10182940B2 disclose the placement of a sensor in a phacoemulsification handpiece, but do not provide a technical solution of how to place the sensor, how to prevent the influence of ultrasonic vibration on the sensor, and how to reduce the influence of the placement of the sensor on ultrasonic performance.

Therefore, there is a need to propose a new design of phacoemulsification handpiece suitable for the installation of the sensors, reducing the performance impact on each other, while achieving a solution reducing or even avoiding the risk of surges with such a phacoemulsification handpiece with sensors.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides a phacoemulsification handpiece and a surge control system for phacoemulsification (using an ultrasonically driven needle to break, emulsify, and aspirate diseased intraocular lenses).

For solving the above technical problem, the technical scheme of the utility model is that:

the utility model provides a take ultrasonic emulsification handle of sensor, includes the handle shell, sets up the super milk syringe needle of handle shell distal end sets up the suction of handle shell near-end connects, inside transducer part and the extension of being provided with of handle shell, the transducer part includes amplitude transformer and drive element, the distal end threaded connection of amplitude transformer the super milk syringe needle, the near-end of amplitude transformer is fixed pipe, the extension includes the extension pipe and fixes the setting and is in sensor on the extension pipe, the extension pipe with for grafting formula loose fit between the fixed pipe and between the two restriction circumferential direction and connect the inner chamber between the two and super milk syringe needle intercommunication form suction channel.

Preferably, the sensor is a Piezoresistive micro-electromechanical (piezoresistance MEMS) pressure sensor.

Preferably, the sensor is fixed on the side surface of the extension pipe in a glue bonding mode, and an electric wire of the sensor is arranged in the ultrasonic emulsification handle cable.

Preferably, the extension part further comprises a sealing and fixing colloid coated outside a connection region between the extension pipe and the fixing pipe.

Preferably, an anti-rotation structure is arranged between the connection ports of the extension pipe and the fixed pipe.

Preferably, the driving element is sleeved and fixed on the periphery of the amplitude transformer and fixed by a tail end block.

Preferably, the proximal end of the fixed tube extends from the proximal end of the end block to the proximal end of the fixed tube no more than one-eighth wavelength of the operating frequency of the handpiece.

Preferably, the transducer portion comprises an amplification zone and a drive zone, the amplification zone having a diameter less than one half the diameter of the drive zone.

Preferably, the length of the drive zone is between one quarter and one half of the wavelength of the horn at the operating frequency of the handle.

Preferably, the driving element is a piezoelectric ceramic.

Preferably, the horn is integrally manufactured with the fixed tube or rigidly fixed.

Preferably, the handle shell is further provided with a perfusion tube, the near end of the perfusion tube is a perfusion connector, and the perfusion connector is used for being connected with a perfusion source.

The utility model also discloses a take ultrasonic emulsification handle of sensor, including the handle shell, set up the super syringe needle of handle shell distal end sets up the suction of handle shell near-end connects, inside transducer part and the extension of being provided with of handle shell, transducer part and extension's inner chamber with the suction connects the intercommunication and forms the suction channel, be provided with the sensor on the extension, for plug-in type loose fit and restriction circumferential direction between the two between transducer part and the extension.

Preferably, the transducer part comprises an amplitude transformer and a driving element, the driving element is piezoelectric ceramic, the far end of the amplitude transformer is in threaded connection with the superfluity needle, the extension part comprises an extension tube and a sensor fixed on the side surface of the extension tube in a glue bonding mode, the far end of the extension tube and the near end of the amplitude transformer are in plug-in loose fit and limit circumferential rotation therebetween, and the connected extension tube and the inner cavity of the amplitude transformer are communicated with the superfluity needle to form a suction channel.

The utility model also discloses a surge control system, include:

the ultrasonic emulsification handle with the sensor is connected to the controller through a handle cable, and the ultrasonic generator is arranged in the controller;

an irrigation source connected to the phacoemulsification handle by an irrigation hose;

a vacuum generating device connected to the phacoemulsification handle through a suction hose, and the other side thereof is connected to a waste liquid bag through a waste liquid chamber and a waste liquid channel;

and the normally closed suction valve is arranged between the suction hose and the waste liquid cavity, is connected to the controller through a first signal line, and is provided with a negative pressure release channel between the suction valve and the waste liquid cavity.

Preferably, the perfusion hose is provided with a perfusion sensor and a perfusion valve which are connected to the controller through a second signal line and a third signal line.

The beneficial effects of the utility model are mainly embodied in that:

1. the middle suction pipe of the ultrasonic emulsification handle consists of two loosely matched sections: a fixed tube and an extension tube; a small pressure sensor is mounted on the extension tube, but still maintains the size and ultrasonic performance of the handle for ease of use;

2. the design and installation scheme of the extension tube (loose fit of ultrasonic vibration coupling) reduces the influence of ultrasonic vibration on the sensor to the maximum extent, and can maintain enough rigidity for installing and disassembling the super-mammary needle head;

3. the design of the handle transducer reduces the impact of such sensor mounting on ultrasonic performance;

4. for phacoemulsification cataract extraction, the distance between the approach pressure sensor and the surgical range provides a technical scheme for reliably controlling surge risk.

Drawings

FIG. 1 is a schematic diagram of a simple phacoemulsification system of the prior art;

FIG. 2 is a schematic structural view of a phacoemulsification handpiece in accordance with a preferred embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of the phacoemulsification handle of FIG. 2 with the housing and irrigation sleeve removed;

FIG. 4 is a cross-sectional view taken along line B-B of FIG. 3;

fig. 5 is a topology diagram of a surge control system according to a preferred embodiment of the present invention.

Detailed Description

The present invention will be described in detail below with reference to specific embodiments shown in the drawings. However, these embodiments are not limited to the present invention, and structural, method, or functional changes made by those skilled in the art according to these embodiments are all included in the scope of the present invention.

In the description of the embodiments, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the embodiment, the operator is used as a reference, and the direction close to the operator is a proximal end, and the direction away from the operator is a distal end.

As shown in fig. 2 to 3, the present invention discloses a phacoemulsification hand piece with a sensor, which comprises a hand piece housing 201, a needle 202 disposed at the distal end of the hand piece housing 201, and a suction connector 204 disposed at the proximal end of the hand piece housing 201, wherein the suction connector is used for connecting a vacuum generator 507 (fig. 5).

The handle shell 201 is also provided with an infusion tube 206, and the proximal end of the infusion tube 206 is provided with an infusion connector 205 which is used for connecting an infusion source 512 (fig. 5). The connection part of the super-breast needle 202 and the handle shell 201 is also provided with a perfusion sleeve.

The ultrasonic emulsification handle integrates two functions of suction and perfusion, and the detailed description is omitted.

The utility model discloses in, handle shell 201 is inside to be provided with transducer part and extension, and the transducer part can be more detailed divide into two districts: an amplification region 310 and a drive region 311. The transducer part comprises an amplitude transformer 301 and a driving element 302, the far end of the amplitude transformer 301 is connected with the end of the super-mammary needle head 202 in a threaded manner, the specific amplitude structure of the amplitude transformer 301 is not the key point of the utility model, and the description is omitted here. In the preferred embodiment, the driving element 302 is fixed to the outer circumference of the horn 301 and fixed by an end block 303. The driving element 302 is a piezoelectric ceramic. The maximum outer diameters of the endblock 303, drive element 302, and horn 301 are approximately the same, and are drive zone 311, and the smaller outer diameter section of horn 301 is amplification zone 310.

The proximal end of horn 301 is a fixed tube 304, and horn 301 is integrally formed with fixed tube 304, or both may be formed as separate elements but rigidly fixed when installed.

The extension part comprises an extension pipe 305, a sensor 307 and a sealing and fixing colloid 306. Specifically, the sensor 307 is fixed to the side surface of the extension pipe 305 by means of adhesive bonding, and a power line and a signal line of the sensor 307 are arranged in the phacoemulsification handle cable. The sensor 307 is a piezo-resistive micro-electro-mechanical (piezo resistive mems) pressure sensor.

In prior designs, the intermediate suction duct is a two-piece member that is integrally or rigidly fixed together so that strong ultrasonic vibrations are present at the suction duct. If the transducer is fixed to such a suction tube, it is easily disturbed or even damaged by ultrasonic vibrations. In order to avoid this, the present invention provides a suction channel formed by the connection between the extension tube 305 and the fixing tube 304, the connection being formed by the loose-fitting and insertion-type connection, the circumferential rotation of the connection being limited between the extension tube and the fixing tube, and the connection between the inner cavity of the extension tube and the inner cavity of the connection and the connection of the super-mammary infusion needle 202. Of course, the specific plug-in type fitting may be that the extension pipe 305 covers the outer periphery of the fixed pipe 304 as shown in fig. 3, or the fixed pipe 304 covers the outer periphery of the extension pipe 305.

The sealing fixing colloid 306 is coated outside the connection region between the extension pipe 305 and the fixing pipe 304. The hardness of the sealing and fixing colloid 306 after hardening is between 60 and 90 Shore A. It should be noted that the loose fitting in the present invention refers to the loose fitting of ultrasonic vibration coupling,

the extension tube 305 and the fixed tube 304 do not form a rigid body, so the transmission of ultrasound is interrupted here. The cured gel only serves as a mechanical (static or ultra-low frequency transfer) anchor and resists pull-off, i.e., longitudinal relative movement. The colloid after the solidification also plays certain fixed action to circumference, nevertheless can not endure the moment of torsion of frequently installing or dismantling the syringe needle, so the utility model discloses following anti-rotation cooperation structure has been increased.

In practice, the breastfeeding needle 202 needs to be attached to or detached from the horn, typically by a threaded connection. In operation, one hand holds the handle shell 201, and the other hand holds the wrench sleeved on the super-mammary needle 202; torque is transmitted through handle housing 201 to extension tube 305, which is fixedly attached thereto, and then to fixed tube 304, distal end of horn 301. Therefore, an anti-rotation fitting structure is required between the connection ports of the extension pipe 305 and the fixed pipe 304. Fig. 4 shows an application example of an anti-rotation fitting structure having plain surfaces corresponding to each other at the ports of two pipe connections. With this design, the extension tube 305 and transducer 307 are effectively isolated from ultrasonic vibrations, yet remain rigid in the overall structure for a wide variety of mechanical operations. Of course, it should be clear to one skilled in the art that other shapes of anti-rotation mating structures are also permissible.

The added sealing fixing colloid 306 and the loose-fitting structure of the extension tube 305 and the fixing tube 304 can effectively reduce the influence on the ultrasonic performance of the transducer. However, in order to minimize this decrease in performance and maintain the ultrasonic performance of the handle, the present invention discloses the following design of the ultrasonic transducer.

The extension of the proximal end of the fixed tube 304, i.e., the length from the proximal end of the end block 303 to the proximal end of the fixed tube 304, is no more than one-eighth wavelength of the operating frequency of the handpiece, so that there is little ultrasonic vibration where the extension tube 305 is connected to the fixed tube 304. The reason is that: a relatively thin vibrating body (here, the extension of the fixed tube 304) is attached to the end of a relatively thick vibrating body (here, the end block 303) which produces strong vibrations if the thin vibrating body is near 1/4 wavelengths of the operating frequency. Therefore, the shorter the protrusion length, the smaller the amplification of the vibration.

The diameter of the amplification region 310 is less than one-half of the diameter of the drive region 311 to maintain high transducer operating efficiency and reduce the amplitude of the drive region 311. The reason is that: one of the influencing factors of the amplification of the amplitude of the ultrasonic amplitude transformer is the area ratio of the front end to the rear end, the rear end of the ultrasonic amplitude transformer is an amplification area 310, the front end of the ultrasonic amplitude transformer is a driving area 311, the diameter ratio of the front end to the rear end is small, and the amplification effect is large; therefore, as long as the amplitude of the driving region is small, a large amplitude can be generated at the end of the amplification region.

The length of the drive zone 311 is between one quarter and one half of the horn wavelength at the operating frequency of the handle to maintain the load carrying capacity and proper size of the handle. The reason is that: if the drive zone 311 is too short, shorter than the wavelength of the horn 1/4, the handle load is too low, i.e., a point of obstruction at the tip of the needle will cause the overall handle vibration to be very weak; if the drive region 311 is too long, beyond the wavelength of the horn 1/2, not only does the load capacity increase in direct proportion, but the overall handle volume becomes too large.

The utility model also discloses a surge control system, as shown in FIG. 5, include:

a phacoemulsification handpiece 501 with a sensor 521 (307 in fig. 3) connected to a controller 505 through a handpiece cable 511, the controller 505 having an ultrasonic generator built therein; the phacoemulsification handle 501 is provided with a needle 502 (202 in figure 3),

an irrigation source 512 connected to the phacoemulsification handpiece 501 through an irrigation hose 515; the perfusion hose 515 is provided with a perfusion sensor 513 and a perfusion valve 514 which are connected to the controller 505 through second and third signal lines 516 and 517;

a vacuum generator 507 connected to the phacoemulsification hand piece 501 through a suction hose 508, and the other side of the vacuum generator 507 is connected to a waste bag 509 through a waste liquid chamber 518 and a waste liquid channel 519.

In accordance with the prior art, the ultrasonic vibrations are transmitted through the transudatory needle 502 into the eye 503, and the suction underpressure in the suction channel is generated by the vacuum generating means 507. Emulsified cataract tissue 504 is broken and aspirated, and the aspirated cataract and fluid mixture is sent to waste bag 509.

The utility model discloses a difference lies in: the device also comprises a normally closed suction valve 506 which is arranged between the suction hose 508 and a waste liquid cavity 518 and is connected to the controller 505 through a first signal wire 510, and a negative pressure release channel 520 is arranged between the suction valve 506 and the waste liquid cavity 518. In the utility model, when the suction valve 506 is closed, the suction channel is only the suction hose 508 and the handle needle channel connected with the suction hose, so the negative pressure generated by the vacuum generating device is only stored in the channel and is only released through the inner tube of the needle; if the negative pressure is too high, a large amount of liquid can be suddenly aspirated through the needle causing the chamber to collapse. When the suction valve is opened, another suction channel 520 is added, which is connected to the waste chamber 518 and the waste bag 509, and is connected to the atmospheric pressure, and the opening of which is much larger than the inner tube of the needle, so that the negative pressure in the suction channel is compensated very quickly, i.e. the quick release; larger openings, the negative pressure generated by the vacuum device is not at all compensated.

The utility model also discloses a surge control method, including following step:

s1, providing a phacoemulsification handle 501 with a sensor, wherein the phacoemulsification handle comprises a handle shell 201, a phacoemulsification needle 202 arranged at the distal end of the handle shell 201, and a suction connector 204 arranged at the proximal end of the handle shell 201, a transducer part and an extension part are arranged in the handle shell 201, inner cavities of the transducer part and the extension part are communicated with the suction connector 204 to form a suction channel, the extension part is provided with a sensor 307, the transducer part and the extension part are in plug-in loose fit and are limited in circumferential rotation; the ultrasonic emulsification handle 501 is connected to the controller 505 through a handle cable 511, and an ultrasonic generator is arranged in the controller 505;

s2, providing an irrigation source 512 connected to the phacoemulsification handpiece 501 through an irrigation hose 515;

s3, providing a vacuum generating device 507, which is connected to the phacoemulsification handle 501 through the suction hose 508, and the other side of which is connected to the waste liquid bag 509 through the waste liquid cavity 518 and the waste liquid channel 519;

s4, providing a normally closed suction valve 506, disposed between the suction hose 508 and the waste liquid chamber 518, connected to the controller 505 through a first signal line 510, and a negative pressure release channel 520 disposed between the suction valve 506 and the waste liquid chamber 518;

s5, the sensor 307 measures the pressure in the aspiration channel, and the controller 505 calculates the rate of pressure change, such as mmhg/10 ms. A threshold is set within the controller based on fluid system parameters including, but not limited to, intraocular pressure, IOP, equivalent infusate bottle height, the size of the diameter of the breast needle 202, the maximum vacuum level of the vacuum generating device 507. If the rate of pressure change is greater than the threshold value as soon as the congestion is cleared, the controller 505 controls the suction valve 506 to open and the negative pressure in the suction channel is quickly released through the negative pressure release channel 520, so surging is prevented.

The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and enhancements can be made without departing from the spirit and scope of the invention, and such modifications and enhancements are intended to be within the scope of the invention.

Claims (16)

1. A phacoemulsification hand piece with a sensor comprises a hand piece shell (201), a phacoemulsification needle (202) arranged at the far end of the hand piece shell (201), a suction connector (204) arranged at the near end of the hand piece shell (201), characterized in that the inside of the handle shell (201) is provided with a transducer part and an extension part, the transducer part comprises a horn (301) and a drive element (302), the distal end of the horn (301) is connected with the ultra-mammary needle head (202) in a threaded mode, the proximal end of the horn (301) is a fixed tube (304), the extension part comprises an extension tube (305) and a sensor (307) fixedly arranged on the extension tube (305), the extension tube (305) and the fixed tube (304) are in plug-in loose fit, the circumferential rotation is limited between the extension tube and the fixed tube, and the inner cavities of the extension tube and the fixed tube are communicated with the ultra-milk needle (202) to form a suction channel.

2. The sensored phacoemulsification handpiece of claim 1, wherein the sensor (307) is a piezo-resistive microelectromechanical pressure sensor.

3. The phacoemulsification handpiece with sensor according to claim 1, wherein the sensor (307) is fixed to the side of the extension tube (305) by means of glue bonding, and the electric wire of the sensor (307) is disposed in the phacoemulsification handpiece cable.

4. The phacoemulsification handpiece with sensor according to any one of claims 1 to 3, wherein the extension part further includes a sealing fixing gel (306) coated outside a connection region of the extension tube (305) and the fixing tube (304).

5. The phacoemulsification handpiece with sensor according to claim 1, wherein an anti-rotation structure is provided between the connection port of the extension pipe (305) and the fixing pipe (304).

6. The sensored phacoemulsification handpiece of claim 1, wherein the driving element (302) is fixed around the outer circumference of the horn (301) by a terminal block (303).

7. The sensorized phacoemulsification handpiece of claim 6, wherein the extension of the proximal end of the fixed tube (304) is a length from the proximal end of the tip block (303) to the proximal end of the fixed tube (304) that is no more than one-eighth wavelength of the operating frequency of the handpiece.

8. The sensored phacoemulsification handpiece of claim 1, wherein the transducer portion includes an amplification zone (310) and a drive zone (311), the amplification zone (310) having a diameter less than one-half of a diameter of the drive zone (311).

9. The sensored phacoemulsification handpiece of claim 8, wherein the length of the drive section (311) is between one quarter and one half of the horn wavelength at the operating frequency of the handpiece.

10. The sensored phacoemulsification handpiece of claim 1, wherein the driving element (302) is a piezoelectric ceramic.

11. The sensorized phacoemulsification handpiece of claim 1, wherein the horn (301) is integrally manufactured with the fixed tube (304) or rigidly fixed.

12. The sensorized phacoemulsification handpiece of claim 1, wherein an irrigation tube (206) is further provided on the handpiece housing (201), and an irrigation connector (205) is provided at a proximal end of the irrigation tube (206) and is used for connecting to an irrigation source (512).

13. The utility model provides a take phacoemulsification handle of sensor, includes handle shell (201), sets up in the super nipple tip (202) of handle shell (201) distal end, sets up suction connector (204) at handle shell (201) near-end, characterized in that, inside transducer part and the extension of being provided with of handle shell (201), the inner chamber of transducer part and extension with suction connector (204) intercommunication forms suction passage, be provided with sensor (307) on the extension, for plug-in type loose fit and restriction circumferential direction between the two between transducer part and the extension.

14. The phacoemulsification handpiece with a sensor according to claim 13, wherein the transducer part comprises an amplitude transformer (301) and a driving element (302), the driving element (302) is piezoelectric ceramic, the distal end of the amplitude transformer (301) is in threaded connection with the end of.

15. A surge control system, comprising

A sensorized phacoemulsification handpiece (501) as claimed in any one of claims 1 to 14 coupled to a controller (505) via a handpiece cable (511), the controller (505) having an ultrasonic generator built therein;

an irrigation source (512) connected to the phacoemulsification handpiece (501) by an irrigation hose (515);

a vacuum generating device (507) connected to the phacoemulsification handle (501) through a suction hose (508), and connected to a waste liquid bag (509) at the other side thereof through a waste liquid chamber (518) and a waste liquid channel (519);

a normally closed suction valve (506) disposed between the suction hose (508) and the waste liquid chamber (518) and connected to the controller (505) through a first signal line (510), a negative pressure release passage (520) being provided between the suction valve (506) and the waste liquid chamber (518).

16. The surge control system of claim 15, wherein the irrigation hose (515) is provided with an irrigation sensor (513) and an irrigation valve (514) which are connected to the controller (505) by second and third signal lines (516, 517).

Images