Device for assisting in improving negative pressure and rapidly sucking and removing broken nucleus of cataract

Abstract

The utility model relates to a device for assisting in improving negative pressure to quickly suck and remove broken nucleus of cataract, which comprises a suction head, a filter tube body, a filter screen and a flow limiting element, the inlet end of the front end of the filter tube body is connected with the suction head, and the outlet end of the rear end of the filter tube body is connected with a negative pressure suction device. A flow limiting element is further arranged between the outlet end of the rear end of the filter pipe body and the negative pressure suction device, and a filter screen is installed in the filter pipe 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 that of the flow-limiting element. The device has the advantages that the flow limiting element is designed and mounted on the rear side of the suction head, and the inner diameter of the suction head is larger than that of the flow limiting element, so that the problems that the anterior chamber in the eyeball is unstable, shallower, disappears and the like under the condition of overhigh negative pressure can be prevented, and the operation is safe and reliable; meanwhile, the filter screen is designed on the filter pipe body, and the pore diameter of the filter screen is smaller than the inner diameter of the flow limiting element, so that broken nuclei are filtered and collected, and the problem of low negative pressure suction efficiency caused by blockage of the flow limiting element by overlarge broken nuclei is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of cataract nucleus breaking medical instrument, concretely relates to a device for assisting in improving the speed of cataract nucleus breaking under negative pressure. BACKGROUND

[0002] At present, in the process of cataract surgery, the lens of the eye needs to be crushed, and then the crushed lens is taken out, and then an artificial lens is replaced to treat cataract.

[0003] In order to crush the lens, our company has developed a scoop knife, which crushes the lens through manual operation combined with pure instrument method, and the crushed nucleus is sucked out and removed by the negative pressure suction device. The inner diameter of the negative pressure suction needle head needs to be small, and the eye ball is not easy to collapse during suction operation, the maximum negative pressure can reach 500mmHg, but the inner diameter of the negative pressure suction needle head is small, the suction speed is slow, or it cannot be sucked, etc. It cannot meet the use requirement. Now the inner diameter of the negative pressure suction needle head needs to be increased, so that the crushed nucleus can be easily sucked, but the pressure of the negative pressure suction device reaches 120mmHg or more, the anterior chamber of the eye ball is unstable, shallow, or even disappears, which increases the risk of operation and cannot meet the operation requirement.

[0004] At present, a device is needed to ensure that the maximum suction force of the negative pressure suction device reaches 500mmHg, and the anterior chamber of the eye ball can be stably sucked during suction. CONTENT OF THE UTILITY MODEL

[0005] In order to solve the above technical problems, the utility model provides a device for assisting in improving the speed of cataract nucleus breaking under negative pressure, which is designed ingeniously, has reasonable and compact structure, increases the inner diameter of the suction head and improves the negative pressure suction pressure, and ensures stable and safe operation.

[0006] The technical scheme of the utility model:

[0007] The device for assisting in improving the speed of cataract nucleus breaking under negative pressure comprises a suction head, a filter pipe body, a filter screen, a flow limiting element, the front inlet end of the filter pipe body is connected with the suction head, the rear outlet end of the filter pipe body is connected with a negative pressure suction device, a flow limiting element is further arranged between the rear outlet end of the filter pipe body and the negative pressure suction device, and the filter screen is installed in the filter pipe body; the single hole diameter 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.

[0008] The suction head is a negative pressure suction needle head, and the inner diameter of the suction head reaches 27G or more.

[0009] The inner diameter of the suction head reaches 19G or more.

[0010] The inner diameter of the flow limiting element is 27G or less.

[0011] The flow limiting element is designed as a flow limiting port or a length of flow limiting pipe.

[0012] The length of flow limiting pipe is installed at the outlet port part of the filter pipe body.

[0013] The inlet end of the filter pipe body is connected with the discharge port of one end of the injection suction device, and the other end of the injection suction device is provided with a suction head in communication with the discharge port.

[0014] The filter pipe body and the filter screen are made of plastic material; the mouth part of the filter screen is integrally formed with the inner side of the inlet part of the filter pipe body through hot melting connection.

[0015] The length of flow limiting pipe is installed at the outlet end of the filter pipe body through a connecting head, the connecting head comprises a middle plug body, an external connecting pipe head and an internal protective sleeve, the middle plug body is provided with the external connecting pipe head at the outer side, and the internal protective sleeve is arranged at the inner side of the middle plug body, the length of flow limiting pipe is installed at the middle position of the middle plug body, and the two ends of the length of flow limiting pipe extend out of the middle plug body and are located in the internal protective sleeve and the external connecting pipe head respectively; the middle plug body is sealingly connected at the outlet end of the filter pipe body.

[0016] The utility model has the advantages of:

[0017] The flow limiting element is designed to be installed at the back side of the suction head, and the inner diameter of the suction head is larger than that of the flow limiting element, so that the problems of unstable, shallow and disappearing of the anterior chamber of the eyeball under the condition of too high negative pressure are prevented, and the operation safety and reliability are ensured.

[0018] Meanwhile, the filter pipe body is provided with the filter screen, and the pore diameter of the filter screen is smaller than the inner diameter of the flow limiting element, so that the broken nucleus is filtered and collected, the flow limiting element is prevented from being blocked by the broken nucleus, and the problem of low negative pressure suction efficiency is solved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is the schematic diagram of the utility model Figure 1 .

[0020] Figure 2 is the sectional view of the filter pipe body of the utility model.

[0021] Figure 3 is the schematic diagram of the utility model used in cooperation with the injection suction device.

[0022] Figure 4 is Figure 3 the sectional view. DETAILED DESCRIPTION

[0023] Referring to the drawings Figures 1-2The device for assisting to improve the rapid suction of cataract nucleus by negative pressure includes a suction head 1, a filter tube body 2, a filter screen 3, and a flow limiting element 4. The front end inlet of the filter tube body 2 is connected with the suction head 1. The rear end outlet of the filter tube body 2 is connected with a negative pressure suction device. The flow limiting element 4 is arranged between the rear end outlet of the filter tube body 2 and the negative pressure suction device. The filter screen 3 is arranged in the filter tube body 2. The single hole diameter of the filter screen 3 is smaller than the inner diameter of the flow limiting element 4. The inner diameter of the suction head 1 is larger than the inner diameter of the flow limiting element 4.

[0024] The suction head 1 is a negative pressure suction needle head, and the inner diameter of the suction head 1 is greater than 27G.

[0025] The inner diameter of the suction head 1 is greater than 19G.

[0026] The inner diameter of the flow limiting element 4 is less than 27G.

[0027] The flow limiting element 4 is designed as a flow limiting port or a length limiting pipe 41.

[0028] The length limiting pipe 41 is arranged at the outlet port of the filter tube body 2.

[0029] As Figures 3-4 The inlet of the filter tube body 2 is connected with the outlet of an injector 5. The other end of the injector 5 is provided with the suction head 1, and the suction head 1 is communicated with the outlet. The injector has two flow channels. One flow channel is a suction and discharge channel. The negative pressure suction needle head is rotatably arranged at the head of the main body of the injector and communicated with one end of the suction and discharge channel. The other end of the suction and discharge channel is connected with the inlet of the filter tube body through a hose. The other flow channel is a balance liquid injection channel. One end of the balance liquid injection channel is connected with a balance liquid supplement device through a hose. The other end of the balance liquid injection channel is communicated with the head of the main body of the injector and the outside of the negative pressure suction needle head. A silica gel head is arranged outside the negative pressure suction needle head. The lower end of the silica gel head is sealed outside the head of the main body of the injector. The front end of the silica gel head is sleeved outside the negative pressure suction needle head. A side hole is arranged on the side of the head of the silica gel head. The side hole is used for injecting the balance liquid. The end injection is avoided to be sucked and discharged by the negative pressure suction needle head. The prior art is simply explained. For example, the patent CN201922060935.X has related content.

[0030] The filter tube body 2 and the filter screen 3 are made of plastic materials. The mouth of the filter screen 3 and the inner side of the inlet of the filter tube body 2 are connected to form an integrated body through hot melting.

[0031] As Figure 2The length-limiting pipe is installed at the outlet end of the filter pipe body 2 through a connecting head, the connecting head comprises a middle plug body 61, an external connecting pipe head 62 and an internal protective sleeve 63, the middle plug body is externally provided with the external connecting pipe head, the internal side of the middle plug body is provided with the internal protective sleeve, the length-limiting pipe is installed at the middle position of the middle plug body, the length-limiting pipe extends out of the middle plug body at both ends and is located inside the external connecting pipe head and the internal protective sleeve respectively, and the middle plug body is sealingly connected at the outlet end of the filter pipe body.

[0032] In use, the suction head with a proper size is selected, the optimal inner diameter is greater than 19G, the inner diameter of the flow-limiting element is less than 27G, the device can be installed at the rear end of the suction head of the negative pressure suction, the suction head is directly installed through the inlet end of the filter pipe body, the filter pipe body is held by hand to perform the suction operation, another injection balance liquid instrument is required to assist the injection of the balance liquid, the device can also be installed at the rear end of the discharge port of the injection suction device, the ordinary injection suction device can inject the balance liquid and suck the hydrops and other substances at the same time, but cannot be effectively matched with the high negative pressure suction device, the device is installed at the rear of the injection suction device, the diameter of the suction head is increased, the cataract nucleus is effectively sucked and collected through the filter screen, the size of the inner diameter of the flow-limiting element is designed to ensure that the negative pressure of the negative pressure suction device can reach 500mmHg, the problem that the anterior chamber of the eyeball is shallowed or even disappeared is avoided, the suction force is increased, the suction is smooth, the efficiency is improved, the size of the mesh of the filter screen is also designed to ensure that the flow-limiting element is not blocked, and the needs of the cataract nucleus suction are met.

Claims

1. A device for assisting in the rapid extraction of cataract fragments under negative pressure, characterized in that it comprises: It includes a suction head, a filter tube, a filter screen, a flow limiting element, the front end inlet of the filter tube is connected with the suction head, the rear end outlet of the filter tube is connected with a negative pressure suction device, a flow limiting element is arranged between the rear end outlet of the filter tube and the negative pressure suction device, and the filter screen is arranged in the filter tube; the single hole diameter 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 the rapid extraction of cataract nucleus fragments under negative pressure according to claim 1, characterized in that, The suction head is a negative pressure suction needle head, and the inner diameter of the suction head is greater than 27G.

3. The device for assisting in the rapid extraction of cataract nucleus fragments under negative pressure according to claim 2, characterized in that, The inner diameter of the suction head is greater than 19G.

4. The device for assisting in the rapid extraction of cataract nucleus fragments under negative pressure according to claim 1, characterized in that, The inner diameter of the flow limiting element is less than 27G.

5. The device for assisting in the rapid extraction of cataract nucleus pieces under negative pressure according to claim 1, characterized in that, The flow limiting element is designed as a flow limiting port or a length limiting flow pipe.

6. The device for assisting in the rapid extraction of cataract nucleus fragments under negative pressure according to claim 5, characterized in that, The length limiting flow pipe is installed at the outlet port of the filter tube.

7. The device for assisting in the rapid extraction of cataract nucleus fragments under negative pressure according to claim 1, characterized in that, The inlet of the filter tube is connected with the discharge port of one end of a suction device, the other end of the suction device is provided with the suction head, and the suction head is communicated with the discharge port.

8. The device for assisting in the rapid extraction of cataract nucleus fragments under negative pressure according to claim 1, characterized in that, The filter tube and the filter screen are made of plastic material; the mouth of the filter screen and the inner side of the inlet of the filter tube are connected by heat melting to form an integrated body.

9. The device for assisting in the rapid extraction of cataract nucleus fragments under negative pressure according to claim 5, characterized in that, The length limiting flow pipe is installed at the outlet end of the filter tube through a connecting head, the connecting head includes a middle plug body, an external connecting pipe head and an internal protective sleeve, the middle plug body is provided with the external connecting pipe head on the outer side, the internal protective sleeve is arranged on the inner side of the middle plug body, the length limiting flow pipe is installed at the middle position of the middle plug body, the length limiting flow pipe extends out of the middle plug body at both ends and is arranged in the internal protective sleeve and the external connecting pipe head respectively, and the middle plug body is sealingly connected with the outlet end of the filter tube.

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