CN114028072B - Cataract superemulsion device convenient to use - Google Patents
Cataract superemulsion device convenient to use Download PDFInfo
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- CN114028072B CN114028072B CN202111414581.XA CN202111414581A CN114028072B CN 114028072 B CN114028072 B CN 114028072B CN 202111414581 A CN202111414581 A CN 202111414581A CN 114028072 B CN114028072 B CN 114028072B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
- A61F9/007—Methods or devices for eye surgery
- A61F9/00736—Instruments for removal of intra-ocular material or intra-ocular injection, e.g. cataract instruments
- A61F9/00745—Instruments for removal of intra-ocular material or intra-ocular injection, e.g. cataract instruments using mechanical vibrations, e.g. ultrasonic
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Abstract
The present invention relates to the field of medical devices. Aims to provide a cataract hyper-breast device which is convenient to use, comprising an operator, a collector and a negative pressure aspirator; the suction interface of the manipulator is connected with one end of a suction pipeline, and the other end of the suction pipeline extends into the collector and extends to the lower part of the collector; the negative pressure aspirator is connected with one end of the air extraction pipeline, and the other end of the air extraction pipeline extends into the upper part of the collector; the collector is provided with an atmosphere introducing mechanism, the atmosphere introducing mechanism comprises a guide sleeve arranged at the top of the collector, and the lower end of the guide sleeve extends into the collector. The invention can avoid the problem that the adsorption pressure exceeds the safety threshold value due to blockage, can effectively improve the phenomenon of abrupt change of the adsorption pressure, and greatly improves the operation convenience and safety of the cataract ultrasonic emulsification operation.
Description
Technical Field
The invention relates to the field of medical equipment, in particular to a cataract hyper-emulsion device convenient to use.
Background
Phacoemulsification is a widely applicable and widely accepted surgical method for treating cataract at present, after a phacoemulsification needle is inserted into a small incision of cornea or sclera of an operative eye to ultrasonically crush the turbid crystalline lens core and cortex, the crushed crystalline lens is sucked out by a suction and perfusion system, meanwhile, anterior chamber is kept full, and then an artificial lens is implanted, so that a patient is made to be well visible. In this procedure, the superemulsion to the cataract is essentially achieved by emulsifying the clouded lens and then extracting it. In the process of operation, the whole set of equipment adopted usually comprises an operator (namely a phacoemulsification handle), the phacoemulsification needle at the front end of the operator has the phacoemulsification function, and simultaneously has a suction channel and a perfusion channel, wherein the suction channel is sequentially communicated with a collector and a negative pressure aspirator through pipelines, and the perfusion channel is communicated with a perfusate storage tank through pipelines.
As is well known, during the phacoemulsification process, the phacoemulsification is sucked through the manipulator and the tubing, however, many times during the emulsification process, some substances that are not completely emulsified, such as lumps, fragments, etc., will clog in the tubing and slowly advance, thereby possibly causing complete or partial clogging of the pump tubing. With continuous operation of the negative pressure aspirator and blockage of the suction and discharge pipeline, the negative pressure environment (i.e. pressure difference) built in the collector by the negative pressure aspirator is larger and larger, if the blockage suddenly leaves from the suction and discharge pipeline, an excessive adsorption force is generated due to the huge pressure difference, which can have a great influence on the safety of the operation.
In order to solve the above-mentioned problem, in the prior art, a technical solution has appeared in which the negative pressure environment in the collector is stabilized by introducing the external atmosphere, for example, the patent number is: 201810578508.8, the general idea of which is to provide a sliding part which can construct an air supplementing passage for communicating the negative pressure aspirator with the outside atmosphere; when the pumping and draining pipeline is blocked (namely, the pressure in the collector is too low), the sliding part is driven by the external atmospheric pressure to communicate the air supplementing passage, and the air in the collector can be supplemented by the external atmosphere so as to keep the negative pressure not to exceed a safety threshold value. When the pumping pipeline is unblocked, the pumping pipeline can be reset under the pushing of the spring component so as to close the air supplementing channel. The scheme avoids dangerous situations caused by the fact that the negative pressure exceeds the safety threshold to a certain extent. However, it also has a certain problem: because the reset part adopts the spring, and the rebound speed of the spring is too fast, when the pumping and draining pipeline is suddenly conducted, the spring can push the sliding part to act rapidly, so that the suction force is suddenly transferred to the position of the manipulator from the suction force to the outside atmosphere, the pressure of the suction end of the needle head of the manipulator is suddenly changed, and the sudden increase of the pressure, although the size does not exceed the safety threshold, can cause interference and influence on the operation in fact, and especially under the condition that the pressure suddenly changed node is unpredictable after blockage, even a doctor can be induced to generate misoperation, and medical accidents are caused.
Disclosure of Invention
The invention aims to provide a cataract hyper-emulsion device which can avoid abrupt change of adsorption pressure and is convenient to use.
In order to achieve the aim of the invention, the invention adopts the following technical scheme: a cataract hyper-breast device convenient to use comprises an operator, a collector and a negative pressure aspirator; the suction interface of the manipulator is connected with one end of a suction pipeline, and the other end of the suction pipeline extends into the collector and extends to the lower part of the collector; the negative pressure aspirator is connected with one end of the air extraction pipeline, and the other end of the air extraction pipeline extends into the upper part of the collector;
the collector is provided with an atmosphere introducing mechanism, the atmosphere introducing mechanism comprises a guide sleeve arranged at the top of the collector, and the lower end of the guide sleeve extends into the collector; an air inlet blind pipe which is matched with the guide sleeve is arranged in the guide sleeve in a penetrating way, an opening is formed in the upper end of the air inlet blind pipe, the lower end of the air inlet blind pipe is closed, an air passing hole is formed in the side wall of the lower part of the air inlet blind pipe, and a connecting disc is arranged on the peripheral surface of the upper end of the air inlet blind pipe; the atmosphere introducing mechanism further comprises a position control assembly for controlling the position of the air inlet blind pipe;
the position control assembly is arranged between the connecting disc and the top surface of the collector and comprises a hollow driving box, damping liquid is filled in the driving box, and a buoyancy reset piston is arranged in the driving box; the buoyancy resetting piston and the driving box form vertical sliding fit, the upper surface of the buoyancy resetting piston is fixedly connected with the lower end of the connecting rod, and the upper end of the connecting rod penetrates through a guide pipe arranged at the top of the driving box and is fixedly connected with the connecting disc; the buoyancy resetting piston is provided with a large-size first through hole and a small-size second through hole, and a one-way valve which is communicated unidirectionally from bottom to top is arranged in the first through hole;
when the pressure difference between the inside of the collector and the outside atmosphere is lower than a safety threshold value, the collector is driven by the buoyancy of damping fluid, and the buoyancy resetting piston can move to the top of the driving box so as to enable the air passing hole of the air inlet blind pipe to be positioned in the guide sleeve; when the pressure difference between the inside of the collector and the outside atmosphere is higher than a safety threshold, the atmospheric pressure can overcome the buoyancy of the damping fluid to drive the air inlet blind pipe to move downwards, so that the air passing hole of the air inlet blind pipe is exposed from the lower end of the guide sleeve.
Preferably, the inner surface at the top of the collector is also provided with a gas path guide cylinder, the gas path guide cylinder is coated outside the guide sleeve and the gas inlet blind pipe, the lower end of the gas path guide cylinder is provided with a vertical extension pipe, the upper end of the extension pipe is communicated with the inside of the gas path guide cylinder, and the lower end of the extension pipe extends to a position which is aligned with the pumping pipe.
Preferably, the upper end of the guide sleeve extends beyond the collector and a section beyond the collector forms a guide extension.
Preferably, sealing rubber rings are arranged between the guide sleeve and the air inlet blind pipe and between the connecting rod and the guide pipe.
Preferably, the position control components comprise a plurality of groups, and the plurality of groups of position control components are uniformly distributed in a ring shape around the air inlet blind pipe; the driving box is hollow and cylindrical, and the buoyancy restoring piston is disc-shaped.
Preferably, the position control assembly is provided with a group, the driving box is hollow and circular, and the driving box is coaxially arranged outside the air inlet blind pipe; the buoyancy resetting piston is in a circular ring shape.
Preferably, the driving box is provided with a liquid exchange port and an emptying port, and valves are arranged at the liquid exchange port and the emptying port.
Preferably, the air inlet blind pipe, the connecting disc and the connecting rod are all made of low-density plastic.
Preferably, the buoyancy restoring piston comprises a piston body made of low-density foam and a rubber sealing film arranged on the side edge of the piston body and used for contacting with the inner wall of the driving box; the first through hole and the second through hole are arranged on the piston body.
The beneficial effects of the invention are concentrated in that: can avoid the adsorption pressure that causes because the jam surpasss the problem of safe threshold value, can effectually improve the phenomenon that adsorption pressure is abrupt change simultaneously, have very big promotion cataract phacoemulsification's operation convenience and security.
Specifically, in the use process of the invention, under the normal use condition (namely, under the condition that the pumping pipeline is unblocked), the negative pressure suction path is an operator, a pumping pipeline, a collector, a pumping pipeline and a negative pressure aspirator; when certain jam appears in the suction pipe way, negative pressure aspirator continuously works, with the inside pressure reduction of collector, its pressure differential with external atmosphere increases, external atmospheric pressure overcomes the buoyancy of damping fluid, promote the blind pipe that admits air, the connection pad, the connecting rod, buoyancy reset piston is whole to move down, in the in-process of moving down, the guide sleeve is exposed to the overair hole on the blind pipe that admits air, external atmosphere can get into in the collector through the overair hole, the introduction to external atmosphere has been realized, that is to say that the route of negative pressure suction is partly adjusted to the blind pipe that admits air at this moment, the overair hole, the collector, the pumping pipeline, negative pressure aspirator, thereby prevent under the circumstances that the negative pressure environment that takes place in the collector exceeds the safety threshold under the circumstances that certain jam takes place in the suction pipe way. Simultaneously, owing to the existence of large-scale first through-hole, and its inside is provided with the check valve, and buoyancy reset piston is at the in-process of downward movement, and damping fluid can flow fast, avoids causing the interference to the motion of buoyancy reset piston, and the reaction rate of pressure limiting is faster.
When the blockage in the pumping pipeline flows through the pumping pipeline, after the pumping pipeline is completely conducted, the negative pressure suction path corresponding to the pumping pipeline is completely recovered, and under the driving of the buoyancy of damping liquid, the air inlet blind pipe, the connecting disc, the connecting rod and the buoyancy resetting piston integrally move upwards, and in the upward moving process, the air passing hole on the air inlet blind pipe reenters the inside of the guide sleeve to realize sealing, so that the path of external atmosphere introduction is blocked, and the normal operation of equipment is maintained. Meanwhile, due to the existence of the second through hole with the small size and the limit of the one-way valve arranged in the first through hole, the buoyancy resetting piston can only slowly flow through the second through hole in the upward moving process, so that the air inlet blind pipe can be reset, and can not reset too quickly, but can reset relatively slowly and stably, the problem of abrupt change of pressure of the adsorption end of the manipulator caused by too quick resetting is solved, and the stability of operation of doctors is improved.
Drawings
FIG. 1 is a block diagram of the structure of the present invention;
FIG. 2 is an enlarged view of portion A of FIG. 1 in one embodiment;
FIG. 3 is a schematic illustration of the configuration of the buoyant return piston in the embodiment shown in FIG. 2;
FIG. 4 is an enlarged view of portion A of FIG. 1 in another embodiment;
fig. 5 is a schematic diagram of the buoyancy return piston according to the embodiment shown in fig. 4.
Description of the embodiments
As shown in fig. 1-5, a cataract hyper-breast device for convenient use comprises an operator 1, a collector 2 and a negative pressure aspirator 3. The manipulator 1 is the same as the traditional manipulator, and comprises a phacoemulsification needle, the phacoemulsification needle can perform the pouring of the intraocular pouring cleaning liquid and the pumping and discharging of the emulsion, a pumping interface of the manipulator 1 is connected with one end of a pumping and discharging pipeline 4, and the other end of the pumping and discharging pipeline 4 extends into the collector 2 and extends to the lower part of the collector 2. The negative pressure aspirator 3 can be a negative pressure pump, the aspiration end of the negative pressure aspirator 3 is connected with one end of the air extraction pipeline 5, and the other end of the air extraction pipeline 5 extends into the upper part of the collector 2. The general working principle is the same as the existing device, and the manipulator 1 is used for ultrasonic emulsification of the crystalline lens, and the cleaning liquid is poured for cleaning, and the cleaning liquid and the emulsion are pumped and discharged at the same time so as to keep the pressure balance of the anterior chamber and the posterior chamber.
The present invention is most different from the conventional cutting device in that the collector 2 is provided with an atmospheric air introduction mechanism 6, and as shown in fig. 2, the atmospheric air introduction mechanism 6 includes a guide 7 provided at the top of the collector 2, and the lower end of the guide 7 extends into the collector 2. The guide sleeve 7 is internally provided with an air inlet blind pipe 8 in a penetrating way, the upper end of the air inlet blind pipe 8 is provided with an opening, the lower end of the air inlet blind pipe is closed, the side wall of the lower part of the air inlet blind pipe 8 is provided with an air passing hole 9, the air passing hole 9 can be a strip-shaped through hole which extends vertically, or the air passing hole 9 is formed by a plurality of densely distributed hole groups. The conduction or closing of the air passing holes 9 is realized through the control of the positions of the air passing holes 9 relative to the guide sleeve 7, and when the air passing holes 9 extend out of the guide sleeve 7, the conduction is realized; the guide sleeve 7 is closed when retracted, and a sealing rubber ring is arranged between the guide sleeve 7 and the air inlet blind pipe 8 in order to ensure the air tightness when the air inlet blind pipe 8 is retracted. The seal ring is simple in structure, is not shown by reference numerals in the drawings, and can be matched by a person skilled in the art by combining the existing seal ring.
In order to improve the stability of the movement of the inlet blind pipe 8 in the guide sleeve 7, the upper end of the guide sleeve 7 extends outside the collector 2 and beyond a section of the collector 2 forms a guide extension 20, as shown in fig. 2. The peripheral surface of the upper end of the air inlet blind pipe 8 is provided with a connecting disc 10, and the air introducing mechanism 6 further comprises a position control component for controlling the position of the air inlet blind pipe 8.
The invention abandons the traditional mode of controlling the position by elastic components such as springs, rubber bands, elastic sheets and the like, and adopts a buoyancy resetting mode to control the position. The restoring force is more stable (always equal to the buoyancy force), and the buoyancy force is kept unchanged all the time under the condition that the displacement is set, so that the progress control is very convenient. As shown in fig. 2, the position control assembly is arranged between the connecting disc 10 and the top surface of the collector 2, the position control assembly comprises a hollow driving box 11, the driving box 11 is filled with damping liquid 12, and a buoyancy reset piston 13 is arranged in the driving box 11.
The driving box 11 of the present invention has a large specific shape and a flexible number, for example, as shown in fig. 2 and 3, and the position control assemblies include a plurality of groups, and the position control assemblies are uniformly distributed in a ring shape around the air inlet blind pipe 8. The driving box 11 is in a hollow cylindrical shape, and the buoyancy restoring piston 13 is in a disc shape as shown in fig. 3. It is also possible, as shown in fig. 4 and 5, to provide a set of position control assemblies, the driving box 11 is hollow and circular, and the driving box 11 is coaxially arranged outside the air inlet blind pipe 8, and the buoyancy return piston 13 is circular. Of course, other shapes than the above are possible that serve the same purpose.
The buoyancy restoring piston 13 and the driving box 11 form vertical sliding fit, the upper surface of the buoyancy restoring piston 13 is fixedly connected with the lower end of the connecting rod 14, and the upper end of the connecting rod 14 passes through a guide tube 15 arranged at the top of the driving box 11 and is fixedly connected with the connecting disc 10. In order to ensure the tightness of the inside of the driving box 11, sealing rubber rings are also arranged between the connecting rod 14 and the guide tube 15.
Because the lifting speed of the buoyancy restoring piston 13 is directly related to the change trend of the adsorption force, in order to control the speed of the buoyancy restoring piston 13 in the lifting movement process, a large-size first through hole 16 and a small-size second through hole 17 are arranged on the buoyancy restoring piston 13, and a one-way valve which is communicated unidirectionally from bottom to top is arranged in the first through hole 16. As shown in fig. 3 and 5, the buoyancy restoring piston 13 according to the present invention generally includes a piston body 21 made of low density foam and a rubber sealing film 22 provided at a side of the piston body 21 for contact with an inner wall of the driving box 11. The first through hole 16 and the second through hole 17 are provided on the piston body 21. In view of the mobility of the buoyancy return piston 13, which is driven by buoyancy, of other parts such as the inlet blind pipe 8, these moving parts are also preferably made of light materials, that is to say that the inlet blind pipe 8, the connecting disc 10 and the connecting rod 14 are all made of low-density plastics.
When the pressure difference between the inside of the collector 2 and the outside atmosphere is lower than a safety threshold, the structure is shown in fig. 2, the buoyancy force of the damping liquid 12 drives the buoyancy resetting piston 13 to move to the top of the driving box 11, so that the air passing hole 9 of the air inlet blind pipe 8 is positioned in the guide sleeve 7. When the pressure difference between the inside of the collector 2 and the outside atmosphere is higher than the safety threshold, the atmospheric pressure can overcome the buoyancy of the damping liquid 12 to drive the air inlet blind pipe 8 to move downwards, so that the air passing hole 9 of the air inlet blind pipe 8 is exposed from the lower end of the guide sleeve 7.
In the use process, under the normal use condition (namely under the condition that the pumping pipeline 4 is unblocked), the negative pressure suction path is an operator 1, the pumping pipeline 4, a collector 2, a pumping pipeline 5 and a negative pressure aspirator 3; when the pumping and draining pipeline 4 is blocked to a certain extent, the negative pressure aspirator 3 continuously works, the pressure difference between the negative pressure aspirator 3 and the external atmosphere is increased along with the pressure reduction in the collector 2, the external atmosphere overcomes the buoyancy of the damping liquid 12, the air inlet blind pipe 8, the connecting disc 10, the connecting rod 14 and the buoyancy resetting piston 13 are pushed to move downwards as a whole, in the downward moving process, the air passing hole 9 on the air inlet blind pipe 8 is exposed out of the guide sleeve 7, the external atmosphere can enter the collector 2 through the air passing hole 9, and the introduction of the external atmosphere is realized, namely, at the moment, a part of the negative pressure suction path is adjusted to the air inlet blind pipe 8, the air passing hole 9, the collector 2, the air exhaust pipeline 5 and the negative pressure aspirator 3, so that the situation that the negative pressure environment constructed in the collector 2 exceeds the safety threshold value is prevented under the condition that the pumping and draining pipeline 4 is blocked to a certain extent. Meanwhile, due to the existence of the large-size first through hole 16 and the one-way valve arranged in the first through hole, the damping liquid 12 can flow faster in the downward movement process of the buoyancy return piston 13, interference to the movement of the buoyancy return piston 13 is avoided, and the reaction speed of pressure limiting is faster.
When the blockage in the pumping pipeline 4 flows through the pumping pipeline 4, the negative pressure suction path corresponding to the pumping pipeline 4 is completely recovered after the pumping pipeline 4 is completely conducted, the air inlet blind pipe 8, the connecting disc 10, the connecting rod 14 and the buoyancy resetting piston 13 are integrally moved upwards under the driving of the buoyancy of the damping liquid 12, and in the upward movement process, the air passing hole 9 on the air inlet blind pipe 8 reenters the guide sleeve 7 to realize the sealing, so that the path of the external atmosphere is blocked, and the normal operation of the equipment is maintained. Meanwhile, due to the existence of the second through hole 17 with a small size and the limit of the one-way valve arranged in the first through hole 16, the buoyancy resetting piston 13 can only slowly flow through the second through hole 17 in the upward moving process, so that the air inlet blind pipe 8 can be reset, and can not reset too quickly, but can reset relatively slowly and stably, the problem of abrupt change of pressure of the adsorption end of the manipulator 1 caused by too quickly resetting is solved, and the stability of operation of doctors is improved.
On the basis of the above, in order to further improve the stability of the invention, the invention can set the communication node between the atmospheric air introducing mechanism for introducing the external atmosphere and the negative pressure area inside the collector 2 at a position close to the pumping and draining pipeline 4, as shown in fig. 1, the inner surface of the top of the collector 2 is also provided with a gas path guiding cylinder 18, the gas path guiding cylinder 18 is covered outside the guiding sleeve 7 and the air inlet blind pipe 8, the lower end of the gas path guiding cylinder 18 is provided with a vertical extension pipe 19, the upper end of the extension pipe 19 is communicated with the inside of the gas path guiding cylinder 18, and the lower end extends to a position which is level with the pumping and draining pipeline 4.
In addition, because the buoyancy force received by the buoyancy force resetting piston 13 is completely influenced by the liquid discharge amount of the damping liquid 12 in the driving box 11, in order to further improve the adaptability of the invention and adapt to different negative pressure threshold ranges, the driving box 11 is provided with a liquid exchange port and an emptying port, and valves are arranged at the liquid exchange port and the emptying port. Damping fluid 12 with different densities can be replaced through the fluid replacement port so as to construct different buoyancy forces for the buoyancy resetting piston 13, air entering in the fluid replacement process can be discharged through the emptying port, and the injection of the damping fluid 12 is facilitated.
Claims (8)
1. A cataract hyper-breast device convenient to use comprises an operator (1), a collector (2) and a negative pressure aspirator (3); the suction interface of the manipulator (1) is connected with one end of a suction and exhaust pipeline (4), and the other end of the suction and exhaust pipeline (4) extends into the collector (2) and extends to the lower part of the collector (2); the negative pressure aspirator (3) is connected with one end of the air extraction pipeline (5), and the other end of the air extraction pipeline (5) stretches into the upper part of the collector (2);
the method is characterized in that: the collector (2) is provided with an atmosphere introducing mechanism (6), the atmosphere introducing mechanism (6) comprises a guide sleeve (7) arranged at the top of the collector (2), and the lower end of the guide sleeve (7) extends into the collector (2); an air inlet blind pipe (8) which is matched with the guide sleeve (7) is arranged in the guide sleeve in a penetrating way, an opening is formed in the upper end of the air inlet blind pipe (8), the lower end of the air inlet blind pipe is closed, an air passing hole (9) is formed in the side wall of the lower part of the air inlet blind pipe (8), and a connecting disc (10) is arranged on the peripheral surface of the upper end of the air inlet blind pipe (8); the atmosphere introducing mechanism (6) further comprises a position control component for controlling the position of the air inlet blind pipe (8);
the position control assembly is arranged between the connecting disc (10) and the top surface of the collector (2), the position control assembly comprises a hollow driving box (11), damping liquid (12) is filled in the driving box (11), and a buoyancy reset piston (13) is further arranged in the driving box (11); the buoyancy reset piston (13) and the driving box (11) form vertical sliding fit, the upper surface of the buoyancy reset piston (13) is fixedly connected with the lower end of the connecting rod (14), and the upper end of the connecting rod (14) passes through a guide pipe (15) arranged at the top of the driving box (11) and is fixedly connected with the connecting disc (10); the buoyancy resetting piston (13) is provided with a large-size first through hole (16) and a small-size second through hole (17), and a one-way valve which is communicated unidirectionally from bottom to top is arranged in the first through hole (16);
when the pressure difference between the inside of the collector (2) and the outside atmosphere is lower than a safety threshold value, the collector is driven by buoyancy of damping fluid (12), and the buoyancy resetting piston (13) can move to the top of the driving box (11) so as to enable the air passing hole (9) of the air inlet blind pipe (8) to be positioned in the guide sleeve (7); when the pressure difference between the inside of the collector (2) and the outside atmosphere is higher than a safety threshold, the atmospheric pressure can overcome the buoyancy of the damping liquid (12) to drive the air inlet blind pipe (8) to move downwards so that the air passing hole (9) of the air inlet blind pipe (8) is exposed from the lower end of the guide sleeve (7);
the inner surface at the top of the collector (2) is also provided with a gas path guide cylinder (18), the gas path guide cylinder (18) is coated outside the guide sleeve (7) and the air inlet blind pipe (8), the lower end of the gas path guide cylinder (18) is provided with a vertical extension pipe (19), the upper end of the extension pipe (19) is communicated with the inside of the gas path guide cylinder (18), and the lower end of the extension pipe extends to a position which is leveled with the pumping and draining pipe (4).
2. The easy-to-use cataract hyper-emulsion device of claim 1 wherein: the upper end of the guide sleeve (7) extends out of the collector (2), and a section exceeding the collector (2) forms a guide extension (20).
3. The easy-to-use cataract hyper-emulsion device of claim 2 wherein: sealing rubber rings are arranged between the guide sleeve (7) and the air inlet blind pipe (8) and between the connecting rod (14) and the guide pipe (15).
4. A convenient cataract extraction device as claimed in claim 3, wherein: the position control assemblies comprise a plurality of groups, and the position control assemblies are uniformly distributed in a ring shape around the air inlet blind pipe (8); the driving box (11) is hollow and cylindrical, and the buoyancy reset piston (13) is disc-shaped.
5. A convenient cataract extraction device as claimed in claim 3, wherein: the position control assembly is provided with a group, the driving box (11) is in a hollow circular shape, and the driving box (11) is coaxially arranged outside the air inlet blind pipe (8); the buoyancy resetting piston (13) is in a circular ring shape.
6. The easy-to-use cataract extraction device of claims 4 or 5, wherein: the driving box (11) is provided with a liquid exchange port and an emptying port, and valves are arranged at the liquid exchange port and the emptying port.
7. The easy-to-use cataract hyper-emulsion device of claim 6 wherein: the air inlet blind pipe (8), the connecting disc (10) and the connecting rod (14) are all made of low-density plastics.
8. The easy-to-use cataract hyper-emulsion device of claim 7 wherein: the buoyancy resetting piston (13) comprises a piston body (21) made of low-density foam and a rubber sealing film (22) arranged on the side edge of the piston body (21) and used for being in contact with the inner wall of the driving box (11); the first through hole (16) and the second through hole (17) are arranged on the piston body (21).
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| CN202111414581.XA CN114028072B (en) | 2021-11-25 | 2021-11-25 | Cataract superemulsion device convenient to use |
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| CA3128071A1 (en) * | 2019-02-01 | 2020-08-06 | Carl Zeiss Meditec Cataract Technology Inc. | Ophthalmic cutting instruments having integrated aspiration pump |
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| CN114028072A (en) | 2022-02-11 |
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