Device for assisting in increasing negative pressure to quickly remove cataract nuclei

Abstract

The present invention relates to a device for assisting in increasing negative pressure to quickly remove cataract nuclei, comprising a suction head, a filter tube body, a filter screen, and a current limiting element. The front end inlet of the filter tube body is connected to the suction head, and the rear end outlet of the filter tube body is connected to a negative pressure suction device. A current limiting element is also arranged between the rear end outlet of the filter tube body and the negative pressure suction device, and a filter screen is installed inside the filter tube body; the aperture of a single hole of the filter screen is smaller than the inner diameter of the current limiting element, and the inner diameter of the suction head is larger than the inner diameter of the current limiting element. The advantage is that the current limiting element is designed and installed on the rear side of the suction head, and the inner diameter of the suction head is larger than the inner diameter of the current limiting element, which can prevent the problems of instability, shallowing, and disappearance of the anterior chamber inside the eyeball under excessive negative pressure, and ensure the safety and reliability of the operation; at the same time, the filter tube body is designed with a filter screen, and the aperture of the filter screen is smaller than the inner diameter of the current limiting element, so as to realize the filtering and collection of the broken nuclei, and prevent the excessive broken nuclei from blocking the current limiting element, resulting in the problem of low negative pressure absorption efficiency.

Description

Technical Field

[0001] The invention relates to the field of medical devices for cataract nucleus fragmentation, and in particular to a device for assisting in increasing negative pressure to quickly remove cataract nucleus fragmentation. Background Art

[0002] Currently, during cataract surgery, the lens of the eye needs to be crushed, then removed and replaced with an artificial lens to treat the cataract.

[0003] In order to crush the lens, a pocket knife was developed. Through manual operation combined with pure instrumentation, the lens is crushed by the pocket knife. After crushing, the broken nucleus needs to be sucked out and removed by a negative pressure suction device. In the past, the inner diameter of the mouth of the negative pressure suction needle needed to be smaller, so that the inside of the eyeball would not collapse easily during the suction operation. The maximum negative pressure could reach 500 millimeters of mercury (mmHg), but the small inner diameter of the mouth of the negative pressure suction needle will result in slow suction speed or inability to suck, which cannot meet the use requirements. Now the inner diameter of the mouth of the negative pressure suction needle needs to be increased, so that it is easier to suck the broken nucleus, but problems arise when the pressure of the negative pressure suction device reaches more than 120 mmHg. The anterior chamber inside the eyeball is unstable, shallower, or even disappears, increasing the risk of surgery and failing to meet surgical needs.

[0004] Currently, there is a need for a device that can ensure that the maximum suction force of the negative pressure suction device reaches 500 mmHg, and at the same time, the anterior chamber inside the eyeball can be sucked stably. Summary of the invention

[0005] In order to solve the above technical problems, the present invention proposes a device for assisting in increasing negative pressure to quickly remove cataract nuclei. The device has an ingenious design, a reasonable and compact structure, increases the inner diameter of the suction head and increases the negative pressure suction pressure, thereby ensuring stable and safe surgical operations.

[0006] The technical solution of the present invention: A device for assisting in increasing negative pressure to quickly remove cataract nuclei, comprising a suction head, a filter tube body, a filter screen, and a flow limiting element. The front end inlet of the filter tube body is connected to the suction head, and the rear end outlet of the filter tube body is connected to a negative pressure suction device. A flow limiting element is also arranged between the rear end outlet of the filter tube body and the negative pressure suction device, and a filter screen is installed inside the filter tube body; the aperture of a single hole of the filter screen is smaller than the inner diameter of the flow limiting element, and the inner diameter of the suction head is larger than the inner diameter of the flow limiting element.

[0007] The suction head is a negative pressure suction needle, and the inner diameter of the suction head reaches more than 27G.

[0008] The inner diameter of the suction tip is greater than 19G.

[0009] The inner diameter of the current limiting element is less than 27G.

[0010] The flow-limiting element is designed as a flow-limiting port or a length of flow-limiting tube.

[0011] The flow limiting tube of a certain length is installed at the outlet port of the filter tube body.

[0012] The inlet end of the filter tube body is connected to the discharge outlet at one end of the injector and the other end of the injector and the suction head is installed, and the suction head is connected to the discharge outlet.

[0013] The filter tube body and the filter screen are formed by processing with plastic materials; the mouth of the filter screen and the inner side of the inlet position of the filter tube body are connected by hot melting to form a whole.

[0014] The one-length flow-limiting tube is installed at the outlet end of the filter tube body through a connector, the connector includes an intermediate plug body, an external pipe connector, and an inner protective sleeve. An external pipe connector is arranged on the outside of the intermediate plug body, and an inner protective sleeve is arranged on the inside of the intermediate plug body. The one-length flow-limiting tube is installed in the middle position of the intermediate plug body, and both ends of the one-length flow-limiting tube extend out of the intermediate plug body and are respectively located inside the external pipe connector and the inner protective sleeve; the intermediate plug body is sealed and connected to the outlet end of the filter tube body.

[0015] The advantages of the present invention are: The design is ingenious, the structure is reasonable and compact, the current limiting element is designed to be installed on the back side of the suction tip, and the inner diameter of the suction tip is larger than the inner diameter of the current limiting element, which can prevent the anterior chamber inside the eyeball from being unstable, shallow, or disappearing under excessive negative pressure, ensuring safe and reliable surgery; At the same time, a filter screen is designed for the filter tube body, and the aperture of the filter screen is smaller than the inner diameter of the current limiting element, so as to realize the filtering and collection of broken cores and prevent excessively large broken cores from clogging the current limiting element and causing low negative pressure suction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This invention is a schematic diagram Figure 1 .

[0017] Figure 2 It is a cross-sectional schematic diagram of the filter tube body of the present invention.

[0018] Figure 3 It is a schematic diagram of the present invention used in conjunction with the injection-absorption device.

[0019] Figure 4 yes Figure 3 Schematic diagram of the middle section. DETAILED DESCRIPTION

[0020] See attached Figure 1-2, a device for assisting in increasing negative pressure to quickly remove cataract nuclei, comprising a suction head 1, a filter tube body 2, a filter screen 3, and a flow limiting element 4, wherein the front end inlet end of the filter tube body 2 is connected to the suction head 1, and the rear end outlet end of the filter tube body 2 is connected to a negative pressure suction device, and a flow limiting element 4 is further arranged between the rear end outlet end of the filter tube body 2 and the negative pressure suction device, and a filter screen 3 is installed inside the filter tube body 2; the aperture of a single hole of the filter screen 3 is smaller than the inner diameter of the flow limiting element 4, and the inner diameter of the suction head 1 is larger than the inner diameter of the flow limiting element 4.

[0021] The suction tip 1 is a negative pressure suction needle, and the inner diameter of the suction tip 1 is greater than 27G.

[0022] The inner diameter of the suction head 1 is greater than 19G.

[0023] The inner diameter of the current limiting element 4 is less than 27G.

[0024] The flow limiting element 4 is designed as a flow limiting port or a flow limiting tube 41 of a certain length.

[0025] The length of the flow limiting tube is installed at the outlet port of the filter tube body 2 .

[0026] like Figure 3-4 The inlet end of the filter tube body 2 is connected to the discharge outlet at one end of the injector 5, and the other end of the injector 5 is equipped with a suction head 1, which is connected to the discharge outlet. The injector has two flow channels, one of which is the suction and discharge channel. The negative pressure suction needle is rotatably installed on the main head of the injector and is connected with one end of the suction and discharge channel, and the other end of the suction and discharge channel is connected to the inlet end of the filter tube body through a hose or the like; the other flow channel is a balancing liquid injection channel, one end of the balancing liquid injection channel is connected to the balancing liquid replenishing device through a hose, and the other end of the balancing liquid injection channel is connected to the main head of the injector and to the outside of the negative pressure suction needle. A silicone head is installed on the outside of the negative pressure suction needle, and the lower end of the silicone head is sealed on the outside of the main head of the injector, and the front end of the silicone head is sleeved on the outside of the negative pressure suction needle. A side hole is designed on the side of the silicone head close to the head. The side hole is used to inject the balancing liquid to avoid the end injection being sucked out and discharged by the negative pressure suction and discharge needle. This is the prior art, and the present invention is simply explained. For example, patent CN201922060935.X has relevant content records and disclosed.

[0027] The filter tube body 2 and the filter screen 3 are formed by processing with plastic materials; the mouth of the filter screen 3 and the inner side of the inlet position of the filter tube body 2 are connected by hot melting to form a whole.

[0028] like Figure 2The one-length flow-limiting tube 41 is installed at the outlet end of the filter tube body 2 through a connector. The connector includes an intermediate plug body 61, an external pipe connector 62, and an inner protective sleeve 63. An external pipe connector is provided on the outside of the intermediate plug body, and an inner protective sleeve is provided on the inside of the intermediate plug body. The one-length flow-limiting tube is installed in the middle position of the intermediate plug body, and both ends of the one-length flow-limiting tube extend out of the intermediate plug body and are respectively located inside the external pipe connector and the inner protective sleeve; the intermediate plug body is sealed and connected to the outlet end of the filter tube body.

[0029] When the present invention is used, a suction tip of appropriate size is selected, the optimal inner diameter is above 19G, and the inner diameter of the current limiting element is below 27G. The device of the present invention can be installed at the rear end of the suction tip of the negative pressure suction, and the suction tip is directly installed through the inlet end of the filter tube body, and the filter tube body is held to perform the suction operation. This operation requires another device for injecting the balancing liquid to assist in injecting the balancing liquid; the device of the present invention can also be installed at the rear end of the discharge port of the syringe-aspirator. The ordinary syringe-aspirator can inject the balancing liquid while absorbing the effusion and other substances, but it cannot be effectively used in conjunction with the high negative pressure suction device. The device of the present invention is installed behind the syringe-aspirator, which can ensure that the diameter of the suction tip is increased, the broken nuclei are effectively absorbed and collected by filtering through the filter net, and the inner diameter size design of the current limiting element ensures that the negative pressure of the negative pressure suction device can reach 500mmHg, which will not cause the anterior chamber inside the eyeball to become shallow or even disappear, increase the suction force, ensure smooth suction, and improve efficiency. At the same time, the mesh design size of the filter net also ensures that the current limiting element will not be blocked, meeting the needs of cataract nucleus removal.

Claims

1. A device for assisting in increasing negative pressure to quickly remove cataract nuclei, characterized in that: It includes a suction head, a filter tube body, a filter screen, and a flow limiting element. The front end inlet end of the filter tube body is connected to the suction head, and the rear end outlet end of the filter tube body is connected to a negative pressure suction device. A flow limiting element is also arranged between the rear end outlet end of the filter tube body and the negative pressure suction device. A filter screen is installed inside the filter tube body; the aperture of a single hole of the filter screen is smaller than the inner diameter of the flow limiting element, and the inner diameter of the suction head is larger than the inner diameter of the flow limiting element.

2. The device for assisting in increasing negative pressure to quickly remove cataract nuclei according to claim 1, characterized in that: The suction head is a negative pressure suction needle, and the inner diameter of the suction head reaches more than 27G.

3. The device for assisting in increasing negative pressure to quickly remove cataract nuclei according to claim 2, characterized in that: The inner diameter of the suction tip is greater than 19G.

4. The device for assisting in increasing negative pressure to quickly remove cataract nuclei according to claim 1, characterized in that: The inner diameter of the current limiting element is less than 27G.

5. The device for assisting in increasing negative pressure to quickly remove cataract nuclei according to claim 1, characterized in that: The flow-limiting element is designed as a flow-limiting port or a length of flow-limiting tube.

6. The device for assisting in increasing negative pressure to quickly remove cataract nuclei according to claim 5, characterized in that: The flow limiting tube of a certain length is installed at the outlet port of the filter tube body.

7. The device for assisting in increasing negative pressure to quickly remove cataract nuclei according to claim 1, characterized in that: The inlet end of the filter tube body is connected to the discharge outlet at one end of the injector and the other end of the injector and the suction head is installed, and the suction head is connected to the discharge outlet.

8. The device for assisting in increasing negative pressure to quickly remove cataract nuclei according to claim 1, characterized in that: The filter tube body and the filter screen are formed by processing with plastic materials; the mouth of the filter screen and the inner side of the inlet position of the filter tube body are connected by hot melting to form a whole.

9. The device for assisting in increasing negative pressure to quickly remove cataract nuclei according to claim 5, characterized in that: The one-length flow-limiting tube is installed at the outlet end of the filter tube body through a connector, the connector includes an intermediate plug body, an external pipe connector, and an inner protective sleeve. An external pipe connector is arranged on the outside of the intermediate plug body, and an inner protective sleeve is arranged on the inside of the intermediate plug body. The one-length flow-limiting tube is installed in the middle position of the intermediate plug body, and both ends of the one-length flow-limiting tube extend out of the intermediate plug body and are respectively located inside the external pipe connector and the inner protective sleeve; the intermediate plug body is sealed and connected to the outlet end of the filter tube body.

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