Negative pressure suction device for taking out dislocated intraocular lens

Abstract

The utility model discloses a negative pressure suction device for taking a dislocated intraocular lens. The negative pressure suction device mainly comprises a suction catheter, a catheter seat, a butt joint seat, an extension tube, a negative pressure generation device and a negative pressure control device, wherein the combined structure of the suction catheter and the catheter seat can be realized by directly adopting a 22G venous indwelling needle catheter, the combined structure of the suction catheter and the catheter seat is connected to the extension tube through the butt joint seat, the combined structure of the negative pressure generation device and the negative pressure control device can be realized by directly adopting an ultrasonic emulsification and vitreous body cutting machine and a matched pedal controller, and the extension tube is in butt joint with a negative pressure port of the extension tube. The negative pressure is adjusted through the pedal controller, the intraocular lens dislocated to the vitreous cavity is attracted to the pupil area, and damage to the retina in an operation is avoided. The device has the advantages of simplicity and convenience in operation, controllable negative pressure, small trauma and the like, is suitable for minimally invasive extraction or reduction of a dislocated intraocular lens in clinic, and is wide in adaptability.

Description

Technical Field

[0001] The utility model relates to the field of medical instruments, in particular to a negative pressure suction device for removing a dislocated intraocular lens. Background Art

[0002] Intraocular lens (IOL) implantation is a common method for treating cataracts, but some patients may experience complications such as IOL dislocation after surgery. IOL dislocation occurs when the implanted lens detaches from its original suspended position and enters the vitreous cavity or sinks into the area in front of the retina. Although this type of complication is uncommon, it is relatively likely to occur in patients with a history of surgery, especially those who have undergone multiple surgeries or complications. IOL dislocation can cause severe vision loss in patients and require surgical repositioning or removal.

[0003] In existing surgical treatments, a common solution is to retrieve or reposition dislocated IOLs from the retinal area using vitreous forceps. However, this operation has significant limitations and risks. First, since the IOLs need to be clamped during surgery, their smooth surface can easily slip again during operation, increasing the difficulty of the operation. In addition, the operation of the forceps may cause damage to the retina or other intraocular tissues, leading to postoperative complications. Especially when IOLs are located in sensitive areas such as the macula, the operation risk is greater, and once damaged, it may cause irreversible visual impairment. Therefore, there is an urgent need for a device that can effectively transfer dislocated IOLs from the preretinal area to the pupil area under the premise of safe operation, so as to reduce damage to the retina and simplify the operation process. Currently, there is no device or method on the market that can completely avoid the above problems. Therefore, the development of a safe, simple and controllable intraocular lens dislocation repositioning device has important clinical value. Utility Model Content

[0004] The purpose of the utility model is to provide a negative pressure suction device for removing a dislocated intraocular lens, which can safely suck the dislocated intraocular lens to the pupil area through negative pressure, thereby simplifying the surgical operation and avoiding damage to the retina.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A negative pressure suction device for removing a dislocated intraocular lens comprises the following features: a suction catheter, a catheter seat, a docking seat, an extension tube, a negative pressure generating device and a negative pressure control device; the front end of the suction catheter is used to suck the dislocated intraocular lens, and the rear end thereof is inserted into the catheter seat for connection; an airflow cavity is provided inside the docking seat, one end of the airflow cavity docks with the catheter seat, and the other end docks with the extension tube, the other end of the extension tube is connected to the negative pressure port of the negative pressure generating device, and the negative pressure control device is connected to the negative pressure generating device for controlling the size of the negative pressure and switching it on and off.

[0007] According to a further preferred technical solution, a catheter seat docking cannula and an extension tube docking cannula are respectively provided at both ends of the airflow cavity of the docking seat.

[0008] According to a further preferred technical solution, the suction port of the suction catheter is smooth and flat.

[0009] According to a further preferred technical solution, the suction catheter has a length of 33 mm and a tube orifice diameter of 0.9 mm.

[0010] According to a further preferred technical solution, the combined structure of the suction catheter and the catheter seat can be directly implemented using a 22G intravenous indwelling needle catheter.

[0011] According to a further preferred technical solution, the negative pressure generating device adopts an ultrasonic emulsification and vitrectomy machine, and the extension tube is connected to the negative pressure port thereof.

[0012] A further preferred technical solution is that the negative pressure control device adopts a negative pressure foot controller that is compatible with the ultrasonic emulsification and vitrectomy machine, which can control the generation and shutdown of negative pressure, as well as the size of negative pressure, so as to facilitate timely control by the doctor.

[0013] A further preferred technical solution is that the outer surface of the docking seat is provided with an anti-slip texture, which makes it easier for the surgeon to hold the docking seat without slipping, and the operation is more stable.

[0014] According to a further preferred technical solution, the suction catheter is made of polyurethane or polytetrafluoroethylene.

[0015] The beneficial effects of the utility model are:

[0016] 1. Minimally invasive

[0017] The device uses a 22G intravenous catheter and is inserted into the eye through a small incision. It does not require the incision to be expanded, reduces trauma to the patient's eyes, effectively protects the surgical site, and is particularly suitable for minimally invasive eye surgery.

[0018] 2. Easy to operate

[0019] The combined structure of the suction catheter, catheter seat and docking seat simplifies the operation process. The doctor only needs to adjust the negative pressure through the negative pressure control device to complete the operation of sucking out the dislocated intraocular lens, reducing the technical difficulty of the operation.

[0020] 3. Negative pressure is controllable

[0021] The device uses a negative pressure control device, so doctors can flexibly adjust the negative pressure as needed, thereby achieving precise adsorption of the artificial lens and avoiding sudden excessive suction that may cause the lens to slip or damage the intraocular tissue.

[0022] 4. Good airtightness

[0023] The sealing design of the suction catheter, catheter seat and docking seat ensures the stability of the airflow during the negative pressure suction process, improves the adsorption effect, and ensures that the artificial lens will not fall off easily under the action of negative pressure.

[0024] 5. High security

[0025] Through the suction device, the operation is mainly performed on the surface of the lens, avoiding direct interference with the posterior pole and retina, effectively reducing the risks during the operation and reducing postoperative complications.

[0026] 6. Wide applicability

[0027] The device is suitable for various types of intraocular lenses and can also be extended to the removal of smooth-surfaced intraocular foreign bodies. Due to the size design of the 22G catheter, it can handle patients with different axial lengths and is suitable for surgical applications ranging from extra-long axial lengths to regular axial lengths.

[0028] 7. Materials are easily available and low cost

[0029] The device utilizes a conventional 22G intravenous catheter and a common negative pressure generator. The materials are readily available, eliminating the need for specialized equipment and reducing surgical costs. In summary, the innovative negative pressure suction method provided by this utility model provides a safe, stable, and easy-to-use solution, significantly improving the efficiency and safety of dislocated intraocular lens removal or repositioning surgeries. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the negative pressure suction device.

[0031] Figure 2 It is a schematic diagram of the combined structure of the suction catheter and the catheter seat.

[0032] Figure 3This is a schematic diagram of the docking station structure. In the figure: 1 - suction catheter, 2 - catheter station, 3 - docking station, 4 - extension tube, 5 - negative pressure generating device, 6 - negative pressure control device, 31 - catheter station docking cannula, 32 - extension tube docking cannula. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] Example 1:

[0035] like Figure 1 The present invention provides a negative pressure suction device for removing dislocated intraocular lenses. The device comprises a suction catheter 1, a catheter adapter 2, a docking station 3, an extension tube 4, a negative pressure generating device 5, and a negative pressure control device 6. The suction catheter 1 and catheter adapter 2 can be combined with a 22G intravenous catheter. The negative pressure generating device 5 and negative pressure control device 6 can be combined with a phacoemulsification and vitrectomy machine and its associated foot controller.

[0036] The structure and function of each component are as follows:

[0037] Suction catheter 1:

[0038] like Figure 2 As shown, the front end of the suction catheter 1 is used to aspirate a dislocated intraocular lens, while the rear end is inserted into and securely connected to the catheter adapter 2. The suction opening of the suction catheter 1 is smooth and flat, preventing damage to intraocular tissue during the suction process. The catheter is 33 mm long and has a 0.9 mm orifice diameter. Because the suction catheter 1 and catheter adapter 2 are directly connected using a 22G intravenous catheter, they can be inserted into the eye without enlarging the surgical incision, maintaining minimally invasiveness and safety during the procedure.

[0039] The suction catheter 1 is made of polyurethane (PU) or polytetrafluoroethylene (PTFE). Polyurethane (PU) has excellent flexibility and biocompatibility, and is less likely to irritate blood vessel walls. Polytetrafluoroethylene (PTFE), also known as Teflon, has excellent chemical stability and biocompatibility, is less likely to cause rejection, and has low friction, making it easier to insert.

[0040] Catheter hub 2:

[0041] like Figure 2As shown, the catheter adapter 2 is a connecting component of the suction catheter 1. Its internal cavity is sealed with the rear end of the suction catheter 1 to ensure good airtightness during negative pressure suction. The catheter adapter 2 is connected to the docking station 3 through a cannula.

[0042] Docking station 3:

[0043] like Figure 3 As shown, docking station 3 is a key component connecting catheter adapter 2 and extension tube 4. It houses an airflow chamber. One end of the airflow chamber is equipped with a catheter adapter docking cannula 31, which connects to catheter adapter 2, and the other end is equipped with an extension tube docking cannula 32, which connects to extension tube 4. Through this combination, the 22G intravenous catheter system can smoothly transmit negative pressure suction to the suction catheter 1, ensuring precise and stable operation during intraocular lens aspiration.

[0044] In addition, the outer surface of the docking seat 3 is also provided with anti-slip texture, which makes it easier for the surgeon to hold it without slipping, and the operation is more stable.

[0045] Extension tube 4:

[0046] like Figure 1 As shown, the extension tube 4 is used to connect the negative pressure generating device 5 and the docking station 3 to ensure that the negative pressure is transmitted to the suction catheter 1 through the airflow cavity of the docking station 3. The extension tube 4 is made of flexible and pressure-resistant material and has a moderate length, which facilitates the doctor's flexible operation during the operation.

[0047] Negative pressure generating device 5:

[0048] like Figure 1 As shown, negative pressure generating device 5 utilizes a phacoemulsification and vitrectomy machine. This machine is equipped with a negative pressure port, to which an extension tube 4 is connected, generating negative pressure for suctioning a dislocated intraocular lens. Negative pressure generating device 5 provides stable and continuous suction, ensuring that the intraocular lens is securely drawn into the pupil area under the action of negative pressure.

[0049] Negative pressure control device 6:

[0050] like Figure 1 As shown, the negative pressure control device 6 is paired with the negative pressure generating device 5 and utilizes a foot controller from the phacoemulsification and vitrectomy machine. The physician can flexibly control the generation and disengagement of negative pressure using the foot controller, adjusting the suction force according to actual operating needs. This allows the physician to precisely control the negative pressure during aspiration of a dislocated intraocular lens, preventing damage to intraocular tissues caused by excessive suction.

[0051] The specific steps are as follows:

[0052] 1. Insert the suction catheter 1 into the eye through the scleral puncture port in the flat part, and place the suction port close to the dislocated intraocular lens in front of the retina.

[0053] 2. Start the negative pressure generating device 5 and adjust the negative pressure through the negative pressure control device 6. At this time, the suction port of the suction catheter 1 firmly absorbs the intraocular lens through the negative pressure to prevent the lens from slipping again.

[0054] 3. With the help of suction catheter 1, the intraocular lens that has been dislocated into the vitreous cavity is moved to the pupil area, making it easier for the doctor to further reposition or remove the lens.

[0055] 4. Negative pressure control: Initially, use a small amount of negative pressure to attract the surface of the intraocular lens to prevent sudden excessive suction that could cause displacement or drop. After the lens is attracted, gradually increase the negative pressure to ensure that the lens is stable and does not fall.

[0056] 5. After the operation is completed, the negative pressure is turned off by the negative pressure control device 6 to ensure that the intraocular lens is stable in the target position.

[0057] Notes:

[0058] During the procedure, avoid a sudden drop in intraocular pressure and maintain an appropriate negative pressure balance with the intraocular fluid. The balance between buoyancy, gravity, and negative pressure should be considered to ensure successful suction of the dislocated intraocular lens.

[0059] In this embodiment, the 22G intravenous catheter structure, consisting of a suction catheter 1, a catheter adapter 2, and a docking adapter 3, can effectively aspirate and reposition a dislocated intraocular lens. This device features simple operation, controllable negative pressure, and excellent airtightness, making it suitable for clinical intraocular lens removal or repositioning surgeries.

[0060] It should be noted that, in this document, terms such as "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A negative pressure suction device for removing a dislocated intraocular lens, characterized in that: The invention comprises the following features: a suction catheter, a catheter seat, a docking seat, an extension tube, a negative pressure generating device and a negative pressure control device; the front end of the suction catheter is used to suck out the dislocated intraocular lens, and the rear end thereof is inserted into the catheter seat for connection; an airflow cavity is provided inside the docking seat, one end of the airflow cavity is docked with the catheter seat, and the other end is docked with the extension tube, the other end of the extension tube is connected to the negative pressure port of the negative pressure generating device, and the negative pressure control device is connected to the negative pressure generating device for controlling the size of the negative pressure and switching it on and off.

2. A negative pressure suction device for removing a dislocated intraocular lens according to claim 1, characterized in that: Both ends of the airflow cavity of the docking seat are respectively provided with a catheter seat docking cannula and an extension tube docking cannula.

3. The negative pressure suction device for removing a dislocated intraocular lens according to claim 1, characterized in that: The suction port of the suction catheter is smooth and flat.

4. A negative pressure suction device for removing a dislocated intraocular lens according to claim 1, characterized in that: The length of the suction catheter is 33 mm, and the diameter of the tube opening is 0.9 mm.

5. The negative pressure suction device for removing a dislocated intraocular lens according to claim 1, characterized in that: The combined structure of the suction catheter and the catheter seat can be directly implemented using a 22G intravenous indwelling needle catheter.

6. The negative pressure suction device for removing a dislocated intraocular lens according to claim 1, characterized in that: The negative pressure generating device and the negative pressure control device can be directly implemented using an ultrasonic emulsification and vitrectomy machine and its matching negative pressure foot controller. The ultrasonic emulsification and vitrectomy machine is provided with a negative pressure port, and the extension tube is connected to the negative pressure port. The foot controller can control the generation and closing of negative pressure, as well as the size of the negative pressure.

7. The negative pressure suction device for removing a dislocated intraocular lens according to claim 1, characterized in that: The outer surface of the docking seat is provided with anti-slip texture.

8. The negative pressure suction device for removing a dislocated intraocular lens according to claim 1, characterized in that: The suction catheter is made of polyurethane or polytetrafluoroethylene.

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