Negative pressure suction device for ophthalmologic treatment

Abstract

The invention relates to the field of medical treatment, in particular to a negative pressure suction device for ophthalmology treatment, which comprises a suction pipeline, an air inlet branch pipe communicated with the outside is connected to the side of the suction pipeline, a control valve is mounted in the air inlet branch pipe, and the communication condition of an internal pipeline of the air inlet branch pipe is controlled by the control valve; and when the negative pressure in the suction pipeline reaches a set value, the control valve is opened, so that external air enters the suction pipeline through the air inlet branch pipe. The technical problem that the suction pipeline is blocked can be solved.

Description

Technical Field

[0001] The present invention relates to the medical field, and particularly to a negative pressure aspiration device for ophthalmic treatment. Background Art

[0002] In ophthalmic surgeries, the perfusion aspiration technique has a wide range of application scenarios covering multiple aspects such as diagnosis, treatment, and surgical assistance. Its core function is to maintain the intraocular pressure stability through liquid circulation and remove intraocular substances. During perfusion aspiration operations, blockage of the aspiration pipeline is a common and high-risk problem, which may directly affect surgical safety and patient prognosis. For example, when the cataract nucleus has a high hardness (such as grade IV nucleus), the debris generated during emulsification may get stuck on the inner wall of the pipeline; the residual preretinal membrane or choroid tissue during vitrectomy is also likely to block the pipeline; in addition, an excessive amount of viscoelastic agent (such as Healon GV) mixed with debris forms a jelly-like substance, which also blocks the aspiration channel; at the same time, the pipeline is folded or bent, causing debris to get stuck at the bend, forming a physical blockage, and repeated high-temperature sterilization will also cause the elasticity of the pipeline to decrease, the negative pressure maintaining ability to weaken, and the debris to be more likely to stay.

[0003] Thus, it can be seen that aspiration blockage is difficult to completely avoid in ophthalmic surgeries, so there is an urgent need to upgrade the instruments to solve this technical problem. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a negative pressure aspiration device for ophthalmic treatment, which is conducive to solving the technical problem of blockage of the aspiration pipeline.

[0005] To achieve the above purpose, the present invention particularly provides a negative pressure aspiration device for ophthalmic treatment, including an aspiration pipeline. A branch air intake pipe communicating with the outside is connected to the side of the aspiration pipeline. A control valve is installed in the branch air intake pipe, and the communication condition of its internal pipeline is controlled by the control valve; when the negative pressure in the aspiration pipeline reaches a set value, the control valve opens, allowing external air to enter the aspiration pipeline through the branch air intake pipe.

[0006] As a further improvement of the above technical solution, the control valve is of a solenoid valve structure; the device also includes a pressure sensor for real-time monitoring of the negative pressure in the aspiration pipeline. The signal output end of the pressure sensor is connected to a controller, and the controller sends a switch signal to the control valve according to a preset threshold.

[0007] As a further improvement of the above technical solution, the device also includes a reminder, and the controller sends a reminder signal to the reminder according to a preset threshold.

[0008] As a further improvement of the above technical solution, a monitoring branch pipe with a blind pipe structure is connected to the side of the aspiration pipeline, and the pressure sensor is installed in the monitoring branch pipe.

[0009] As a further improvement to the above technical solution, the suction pipeline has a fracture opening, and both ends of the fracture opening are connected by a detachable blocking joint, and a filter element is provided in the blocking joint.

[0010] As a further improvement to the above technical solution, the fracture opening of the suction pipeline is located upstream of the intake branch pipe and is arranged close to the suction end of the suction pipeline.

[0011] As a further improvement to the above technical solution, the blocking joint includes a first connecting ring, a first cleaning ring, an intermediate ring, a second cleaning ring and a second connecting ring which are sequentially sleeved from the suction end to the negative pressure forming end of the suction pipeline; the outer ends of the first connecting ring and the second connecting ring are respectively connected to both ends of the fracture opening, the filter element is a filter mesh structure and is arranged in the intermediate ring, the first cleaning ring is a rotatable structure and a scraping rod extending inwards is fixed on the inner wall thereof, and the scraping rod can rotate on one side surface of the filter element along with the rotation of the first cleaning ring.

[0012] As a further improvement to the above technical solution, the outer surface of the scraping rod is distributed with spike parts or blade parts.

[0013] As a further improvement to the above technical solution, a plurality of connecting rods are radially fixed on the inner walls of the intermediate ring and the second connecting ring and a coaxial inner pipeline is connected through the connecting rods; the second cleaning ring is located radially outside the inner pipeline and there is a flow gap between the two; the filter element is arranged at one end of the inner pipeline close to the intermediate ring.

[0014] As a further improvement to the above technical solution, a first spiral blade is formed on the outer wall of the inner pipeline, a second spiral blade is formed on the inner wall of the second cleaning ring, the first spiral blade and the second spiral blade are arranged in a staggered manner and do not mesh with each other, and the second cleaning ring is a rotatable structure.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects:

[0016] An ophthalmic treatment negative pressure aspiration device provided by the present invention, when the suction holes of the suction pipeline or its internal pipeline are blocked, the negative pressure in the suction pipeline will continue to rise, which may cause overload damage to the negative pressure forming device and damage to the patient's tissue. At this time, the intake branch pipe opens to allow air to enter the suction pipeline, thereby reducing the negative pressure in the suction pipeline in the way of supplementing fluid, quickly bringing the negative pressure value back to the safe range, and protecting the negative pressure forming device; more importantly, in most cases, when the suction head adsorbs to tissue or an object, by introducing air and reducing the negative pressure, the object can be easily released, and the user can actively move the suction head to adjust the position of the suction head, so as to move away from the adsorbed tissue or object, avoiding damage to the patient's tissue caused by forced pulling; if the blockage occurs in the suction pipeline, a special noise will also be generated when air enters the suction pipeline, and the user can timely understand this situation and actively solve the blockage problem through reverse flushing and other methods.

[0017] Advantages of additional aspects of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The schematic diagrams in the specification forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute a limitation to the present invention.

[0019] Figure 1 It is a schematic structural diagram of the first structure of the present invention;

[0020] Figure 2 It is a schematic structural diagram of the second structure of the present invention;

[0021] Figure 3 It is a schematic structural diagram of the blocking joint of the present invention;

[0022] Figure 4 It is a schematic structural diagram of the second cleaning ring of the present invention;

[0023] Figure 5 It is a connection schematic diagram of the intermediate ring and the second connection ring of the present invention;

[0024] Figure 6 It is a cooperation schematic diagram of the first spiral blade and the second spiral blade of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Embodiment 1

[0027] As Figure 1As shown in the figure, a negative pressure suction device provided in this embodiment is mainly applied in the process of ophthalmic treatment. Therefore, it is an ophthalmic treatment negative pressure suction device, including a suction pipe 1. A gas inlet branch pipe 2 communicating with the outside is connected to the side of the suction pipe 1. A control valve 3 is installed in the gas inlet branch pipe 2, and the communication condition of its internal pipeline is controlled by the control valve 3. When the negative pressure in the suction pipe 1 reaches the set value, the control valve 3 opens, allowing external air to enter the suction pipe 1 through the gas inlet branch pipe 2.

[0028] The joint of the suction pipe 1 can be the same as that in the prior art. One end (negative pressure forming end) is connected to a negative pressure forming device (such as a roller pump), and the other end (suction end) can be connected to a suction head. The gas inlet branch pipe 2 is connected to the side of the suction pipe 1, and the angle between the two can be, for example, 10° - 90°. The control valve 3 is of normally closed structure, so that the gas inlet branch pipe 2 is not connected to the atmosphere under normal conditions.

[0029] When the suction hole (possibly provided on the suction head) or the inside of the pipeline of the suction pipe 1 is blocked, the negative pressure in the suction pipe 1 will continuously increase, which may cause overload damage to the negative pressure forming device and damage to the patient's tissue. At this time, the gas inlet branch pipe 2 opens to allow air to enter the suction pipe 1, thereby reducing the negative pressure in the suction pipe 1 in a way of supplementing fluid, and quickly dropping the negative pressure value back to the safe range to protect the negative pressure forming device. More importantly, in most cases, when the suction head adsorbs to tissue or an object (possibly debris or an instrument), by introducing air and reducing the negative pressure, the object can be easily released, and the user can actively move the suction head to adjust the position of the suction head, so as to move away from the adsorbed tissue or object, avoiding damage to the patient's tissue caused by forced pulling. If the blockage occurs inside the suction pipe 1, a special noise will be generated when air enters the suction pipe 1, and the user can timely learn about this situation and actively solve the blockage problem through methods such as reverse flushing.

[0030] An ophthalmic treatment negative pressure suction device provided in this embodiment, the control valve 3 is of electromagnetic valve structure. The device further includes a pressure sensor 4 for real-time monitoring of the negative pressure in the suction pipe 1. The signal output end of the pressure sensor 4 is connected to a controller 5, and the controller 5 sends a switch signal to the control valve 3 according to a preset threshold.

[0031] With this structure, closed-loop control can be achieved through real-time monitoring by the pressure sensor 4 and dynamic adjustment of the solenoid valve. The pressure sensor 4 can be a silicon piezoresistive sensor structure, which can detect the negative pressure value in the pipeline in real time (range: -1000 to 0 mmHg, accuracy ±1 mmHg), output a 4-20 mA current signal, and after being transmitted to the controller 5 (such as an STM32 single-chip microcomputer) through a signal conditioning module (amplification / filtering), the controller 5 can preset a negative pressure safety threshold (such as -400 mmHg). When the detected value of the pressure sensor 4 exceeds the threshold, the controller 5 sends an opening signal to the solenoid valve.

[0032] A negative pressure suction device for ophthalmic treatment provided in this embodiment further includes a reminder 6. The controller 5 sends a reminder signal to the reminder 6 according to the preset threshold. The reminder 6 can, for example, remind the user to intervene and handle the blockage problem in time by means of continuous beeping, flashing lights, vibration or voice prompts. All the electronic components mentioned in this embodiment can be powered by the mains electricity.

[0033] A negative pressure suction device for ophthalmic treatment provided in this embodiment has a monitoring branch pipe 7 with a blind pipe structure connected to the side of the suction pipe 1, and the pressure sensor 4 is installed in the monitoring branch pipe 7. The monitoring branch pipe 7 is an independent pipe with a closed end and is connected laterally to the main suction pipe, which can prevent the sensor from directly contacting the high-speed flowing liquid or debris and reduce the pressure fluctuation amplitude. The inner wall of the monitoring branch pipe 7 can be coated with a polytetrafluoroethylene (PTFE) coating to reduce liquid residue and prevent the formation of biofilms from affecting the sensitivity.

[0034] Embodiment 2

[0035] As Figures 2 to 5 shown, a negative pressure suction device for ophthalmic treatment provided in this embodiment can be obtained by further improving on the basis of the disclosure of Embodiment 1.

[0036] In this embodiment, the suction pipe 1 has a fracture opening, and both ends of the fracture opening are connected by a detachable blocking joint 8, and a filter element 86 is provided inside the blocking joint 8. The fracture opening is the missing opening formed by the disconnection of the suction pipe 1. When the suction pipe 1 is blocked, the blockage may accumulate at an uncertain position in the pipeline, making it difficult to handle. By setting a fracture opening and connecting it with the blocking joint 8, the filter element 86 can intercept the blockage here, thus artificially forming a blockage accumulation area, which is convenient for the user to clean. Preferably, the fracture opening of the suction pipe 1 is located upstream of the intake branch pipe 2 and close to the suction end of the suction pipe 1.

[0037] A negative pressure suction device for ophthalmic treatment provided in this embodiment, the blocking joint 8 includes a first connecting ring 81, a first cleaning ring 82, an intermediate ring 83, a second cleaning ring 84 and a second connecting ring 85 sleeved in sequence from the suction end to the negative pressure forming end of the suction pipe 1; the outer ends of the first connecting ring 81 and the second connecting ring 85 are respectively connected to the two ends of the fracture opening, the filter element 86 is of a filter mesh structure and is arranged in the intermediate ring 83, the first cleaning ring 82 is a rotatable structure and a scraping rod 87 extending inwards is fixed on its inner wall, and the scraping rod 87 can rotate on one side surface of the filter element 86 as the first cleaning ring 82 rotates.

[0038] The blocking joint 8 adopts a multi-layer sleeve-type modular design, and realizes the functions of active filtration and self-cleaning through mechanical linkage; the first connecting ring 81 and the second connecting ring 85 can be connected to the suction pipe 1 through a thread pair, for example; both ends of the first cleaning ring 82 can be clamped into the first connecting ring 81 and the intermediate ring 83 and axially limited, but it does not affect its self-axis rotation (passive rotation, which requires manual control); the length of the scraping rod 87 is at least the same as the inner diameter radius of the first cleaning ring 82, and it clears the blockage on the surface of the filter mesh during its rotation, reducing and even eliminating the blockage, so that the flow rate is restored.

[0039] Preferably, the outer surface of the scraping rod 87 is distributed with spiked parts (or blade parts); this structure can enhance the crushing and cutting ability of the scraping rod 87, upgrade passive filtration to active crushing, prevent large blockage from jamming the filter mesh, and reduce the maintenance frequency; crushing the blockage can contribute to the subsequent suction efficiency and avoid pipeline blockage; of course, the side surface of the scraping rod 87 close to the filter element 86 can be not provided with spiked parts to avoid damaging the filter element 86.

[0040] A negative pressure suction device for ophthalmic treatment provided in this embodiment, a plurality of connecting rods 88 are radially fixed on the inner walls of the intermediate ring 83 and the second connecting ring 85, and a coaxial inner pipe 89 is connected through the connecting rods 88; the second cleaning ring 84 is located radially outside the inner pipe 89 and there is a flow gap between them; the filter element 86 is arranged at one end of the inner pipe 89 close to the intermediate ring 83. There is a gap between adjacent connecting rods 88, and this gap is the position for fluid to enter and exit the flow gap; the inner pipe 89 serves as a primary filtration channel, and the filter element 86 intercepts large particles; the flow gap serves as a secondary channel, allowing smaller particles and fluids that are not intercepted to pass through, and at the same time the flow gap allows the debris accumulated on the front side of the filter element 86 to break away under the action of centrifugal force, avoiding excessive deposition.

[0041] A negative pressure aspiration device for ophthalmic treatment provided in this embodiment. A first spiral blade 89a is formed on the outer wall of the inner pipe 89, and a second spiral blade 84a is formed on the inner wall of the second cleaning ring 84. The first spiral blade 89a and the second spiral blade 84a are arranged in a staggered manner (for example, the first spiral blade 89a is placed between the grooves of the second spiral blade 84a) and do not mesh with each other (do not contact). The second cleaning ring 84 is a rotatable structure. The spiral blades not only generate an air duct and air vortex to form a low-pressure area, enhancing the aspiration effect, but also can break the debris when it flows between the first spiral blade 89a and the second spiral blade 84a. The staggered spiral blades destroy the laminar flow characteristics of the fluid, preventing the cleared debris from reattaching.

[0042] Finally, it should be noted that specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the core idea of the present invention. Without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the present invention.

Claims

1. A negative pressure suction device for ophthalmic treatment, comprising a suction pipe, characterized in that: An intake branch communicating with the outside is connected to the side of the suction pipe, and a control valve is installed in the intake branch, and the communication status of the internal pipeline thereof is controlled by the control valve; when the negative pressure in the suction pipe reaches a set value, the control valve opens, so that external air enters the suction pipe through the intake branch.

2. The negative pressure suction device for ophthalmic treatment according to claim 1, characterized in that: The control valve is of a solenoid valve structure; the device further includes a pressure sensor for real-time monitoring of the negative pressure in the suction pipe, and a signal output end of the pressure sensor is connected to a controller, and the controller sends a switch signal to the control valve according to a preset threshold.

3. The negative pressure suction device for ophthalmic treatment according to claim 2, characterized in that: The device further includes a reminder, and the controller sends a reminder signal to the reminder according to a preset threshold.

4. The negative pressure suction device for ophthalmic treatment according to claim 2, characterized in that: A monitoring branch with a blind pipe structure is connected to the side of the suction pipe, and the pressure sensor is installed in the monitoring branch.

5. The negative pressure suction device for ophthalmic treatment according to any one of claims 1 to 4, characterized in that: The suction pipe has a fracture, and both ends of the fracture are connected by a detachable blocking joint, and a filter element is provided in the blocking joint.

6. The negative pressure suction device for ophthalmic treatment according to claim 5, characterized in that: The fracture of the suction pipe is located upstream of the intake branch and is arranged close to the suction end of the suction pipe.

7. The negative pressure suction device for ophthalmic treatment according to claim 5, characterized in that: The blocking joint includes a first connecting ring, a first cleaning ring, an intermediate ring, a second cleaning ring and a second connecting ring which are sequentially sleeved from the suction end to the negative pressure forming end of the suction pipe; the outer ends of the first connecting ring and the second connecting ring are respectively connected to both ends of the fracture, the filter element is of a filter screen structure and is arranged in the intermediate ring, the first cleaning ring is a rotatable structure, and a scraping rod extending inwards is fixed on the inner wall thereof, and the scraping rod can rotate on one side surface of the filter element as the first cleaning ring rotates.

8. The negative pressure suction device for ophthalmic treatment according to claim 7, characterized in that: Spike parts or blade parts are distributed on the outer surface of the scraping rod.

9. The negative pressure suction device for ophthalmic treatment according to claim 7, characterized in that: A plurality of connecting rods are radially fixed on the inner walls of the intermediate ring and the second connecting ring, and a coaxial inner pipe is connected through the connecting rods; the second cleaning ring is located radially outside the inner pipe, and there is a flow gap between the two; the filter element is arranged at one end of the inner pipe close to the intermediate ring.

10. The negative pressure suction device for ophthalmic treatment according to claim 9, characterized in that: The outer wall of the inner pipe is formed with a first helical blade, and the inner wall of the second cleaning ring is formed with a second helical blade. The first helical blade and the second helical blade are arranged in a staggered manner and do not mesh with each other. The second cleaning ring is a rotatable structure.

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