Intraocular foreign body retriever

Abstract

The utility model discloses an intraocular foreign body catcher relates to medical foreign body clamp technical field, include: handle, have operating part and hold tightly and go up, stem, have the passage and connecting portion of going through, operating part and connecting portion are connected, transmission assembly, go through the passage and be connected on handle, catch and grab the head, open and close to be located in the distal end of stem, and with transmission assembly is connected, control piece, be located on handle and with transmission assembly is connected, control piece is configured as receiving external force to drive transmission assembly and push catch and grab the head and open to catch intraocular foreign body, when external force disappears, control piece elastic return makes catch and grab the head and close to hold up the foreign body in the pocket. The utility model discloses through setting " fish mouth formula " open and close net petal structure, to make the catch and grab the head after opening to intraocular foreign body carry out the catch, realize the efficient, stable catch and grab of intraocular foreign body, reduce the damage to intraocular tissue effectively.

Description

Technical Field

[0001] This utility model relates to the field of medical foreign body clip technology, specifically to an intraocular foreign body catcher. Background Technology

[0002] In ophthalmological clinics, intraocular foreign bodies are a common and potentially blinding emergency, usually requiring vitrectomy for removal. Traditional instruments for removing intraocular foreign bodies are mostly forceps-type designs, relying on the closing of two metal claws to grasp the foreign body.

[0003] For example, a novel intraocular foreign body forceps with announcement number CN213788161U has elastic claws connected to the end of the fixation tube away from the handle, which are used to grasp foreign bodies. However, for foreign bodies with smooth surfaces, irregular shapes, or small sizes, existing clamping instruments have poor grasping stability, and the foreign bodies are prone to slipping during the operation, which not only prolongs the operation time but may also cause secondary damage to intraocular tissues such as the retina.

[0004] For example, an intraocular foreign body forceps with publication number CN110215337A includes a handheld component, a sleeve component, a protective component, a first driving component, and a second driving component. The sleeve component includes an outer sleeve and an inner sleeve that fit together. One end of the outer sleeve is connected to the handheld component. The first driving component drives the inner sleeve to move relative to the outer sleeve. Tweezers are connected to the outer end of the inner sleeve. The protective component covers the other end of the outer sleeve. The protective component is equipped with a magnetic component. This intraocular foreign body forceps, by setting inner and outer sleeves and respectively setting tweezers and a protective component on the inner and outer sleeves, allows it to catch foreign objects of different shapes. However, the combination of the tweezers and the protective component on the outer sleeve results in a large gripping end and a complex structure, making it inconvenient to operate.

[0005] In addition, the design of the tip of existing instruments may scratch sensitive intraocular tissues when entering the eye due to the lack of smoothness of the structure. Therefore, this application proposes an intraocular foreign body catcher that is easy to insert into the eye and capture irregular or small foreign bodies. Utility Model Content

[0006] The purpose of this invention is to provide an intraocular foreign body catcher, which aims to solve the problems of poor stability of existing clamp-type instruments, easy slippage of foreign bodies during operation, and inconvenience of operation.

[0007] This utility model provides an intraocular foreign body catcher, comprising:

[0008] The handle has an operating part and a gripping part;

[0009] The rod has a through channel and a connecting part, and the operating part is connected to the connecting part;

[0010] The transmission component runs through the channel and is connected to the handle;

[0011] The capture head, which opens and closes at the far end of the rod, is connected to the transmission assembly.

[0012] The control element is located on the handle and connected to the transmission assembly;

[0013] The control unit is configured to receive external force to drive the transmission assembly to push the capture head open to catch foreign objects in the eye. When the external force disappears, the control unit elastically returns to its original position to close the capture head and catch the foreign objects.

[0014] Preferably, the capture head includes at least two mesh petals, the ends of which are connected to a transmission assembly via elastic plates, so that the mesh petals open by moving outward toward the distal end of the rod and close by contracting inward toward the rod. The mesh petals are woven from medical-grade shape memory alloy wire or elastic alloy wire and have a preset closed shape.

[0015] Preferably, the transmission assembly includes at least one steel wire and a moving block. The steel wire is slidably disposed in the channel, and the moving block is slidably disposed in the groove of the operating part. One end of the steel wire is connected to an elastic sheet, and the other end of the steel wire is connected to the end of the moving block. The control element is connected to the moving block.

[0016] Preferably, the end of the steel wire is detachably threadedly connected to the movable block via a connector.

[0017] Preferably, the control component is a slider with a ring-shaped structure. The slider is slidably mounted on the outer wall of the operating part, which has at least one strip-shaped limiting hole communicating with the slide groove. The slider is connected to the moving block through the strip-shaped limiting hole by a pin or screw. A spring is connected inside the slide groove, and the end of the spring is connected to the end of the moving block.

[0018] Preferably, the control element is an elastic pressing strip, which is located on both sides or one side of the operating part, with one end of the elastic pressing strip connected to the gripping part; the elastic pressing strip is hinged to the moving block via a hinge rod. The elastic pressing strip is provided with a strip-shaped groove, and one end of the hinge rod is hinged to the inner wall of the strip-shaped groove.

[0019] Preferably, the end of the operating part is provided with an external thread, and the connecting part is provided with an internal thread hole. The handle is detachably threadedly connected to the rod body through the external thread and the internal thread hole.

[0020] Preferably, the net consists of two petals, each with a semi-circular structure, symmetrically arranged along the opening and closing direction. This allows the closed petals to form a "bullet head" structure, opening and closing in a manner similar to a fish's mouth to trap foreign objects inside the eye. The outer diameter of the closed trapping head is less than or equal to the diameter of the straight end of the rod.

[0021] Preferably, the intraocular foreign body catcher is available in 23G, 25G, or 27G sizes to accommodate surgical incisions of different sizes.

[0022] Compared with existing technologies, it has the following beneficial effects:

[0023] 1. More stable capture: Adopting a "fish mouth" type net petal opening and closing design, compared with traditional clamps, it can "swallow" and hold smooth, irregular or small foreign objects like a fish mouth, greatly reducing the risk of foreign objects slipping out.

[0024] 2. Enhanced safety: The grabber head in its closed state has a smooth, blunt structure, minimizing damage to intraocular tissues during insertion and removal.

[0025] 3. More convenient operation: Doctors can control the opening and closing of the capture head by pressing or sliding the control piece, and the operation can be completed with one hand, which improves the efficiency of the operation and is especially suitable for delicate operations in the narrow intraocular space. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only preferred embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the opening of the intraocular foreign body catcher of this utility model;

[0028] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0029] Figure 3 This is a schematic diagram of the closed intraocular foreign body catcher of this utility model;

[0030] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0031] Figure 5 This is a schematic diagram of the capture head of this utility model;

[0032] Figure 6 This is a cross-sectional view of the intraocular foreign body catcher of this utility model;

[0033] Figure 7 This is a schematic diagram of the present invention after the rod body has been disassembled;

[0034] Figure 8 This is a schematic diagram of the transmission component of this utility model;

[0035] Figure 9 This is a schematic diagram of the handle of this utility model;

[0036] Figure 10 This is a schematic diagram of the press-type intraocular foreign body catcher of this utility model;

[0037] Figure 11 This is a diagram illustrating the disassembly of the press-type intraocular foreign body catcher of this utility model. Figure 1 ;

[0038] Figure 12 This is a diagram illustrating the disassembly of the press-type intraocular foreign body catcher of this utility model. Figure 2 ;

[0039] Figure 13 This is a schematic diagram of the transmission component of the press-type intraocular foreign body catcher of this utility model.

[0040] In the figure, 1-handle; 101-operating part; 102-grip part; 103-slide groove; 104-strip-shaped limiting hole;

[0041] 2-Rock body; 201-Channel; 202-Connecting part;

[0042] 3-Transmission assembly; 301-Steel wire; 302-Moving block; 303-Connecting part;

[0043] 4-Catching head; 401-Net petals; 402-Elastic sheet;

[0044] 5-Control component; 501-Strip groove; 502-Sheet-shaped elastic component;

[0045] 6-Spring;

[0046] 7-Hinged rod. Detailed Implementation

[0047] To better understand the structure, functional features, and advantages of this utility model, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings:

[0048] Example 1:

[0049] like Figures 1 to 13 As shown, this utility model provides an intraocular foreign body catcher, comprising:

[0050] The handle 1 has an operating part 101 and a gripping part 102. The operating part 101 is the hand operating end, and the gripping part 102 is the hand gripping end.

[0051] The rod 2 has a through channel 201 and a connecting part 202, and the operating part 101 is connected to the connecting part 202. Specifically, the rod 2 is a slender tubular structure made of high-strength medical-grade stainless steel or titanium alloy to ensure that it is not easily bent or broken during surgical operations. The rod 2 is available in specifications of 23G, 25G and 27G, corresponding to different outer diameter sizes, which can be adapted to common vitrectomy surgical incisions in clinical practice and can be used without enlarging the incision.

[0052] The transmission component 3 passes through the channel 201 and is connected to the handle 1 to transmit force by sliding within the channel 201;

[0053] The capture head 4 is located at the far end of the rod body 2 and is connected to the transmission assembly 3;

[0054] Control component 5 is located on handle 1 and connected to transmission assembly 3;

[0055] The control element 5 is configured to receive external force to drive the transmission assembly 3 to push the capture head 4 to open and catch foreign objects in the eye. When the external force disappears, the control element 5 elastically returns to its original position, causing the capture head 4 to close and catch the foreign objects.

[0056] See Figure 2 and Figure 5 The capture head 4 includes at least two net petals 401. The ends of the net petals 401 are connected to the transmission assembly 3 via elastic sheets 402, so that the net petals 401 open by moving outward to the far end of the rod 2 and close by contracting inward to the rod 2.

[0057] Specifically, the mesh flap 401 can be woven from ultra-fine medical shape memory alloy wire or elastic alloy wire, possessing excellent biocompatibility and elasticity. The mesh size of the mesh flap 401 is carefully designed (e.g., 0.1-0.3mm) to effectively trap foreign objects without allowing even tiny foreign objects to leak out. In its natural state, the two mesh flaps 401 maintain a closed state through their own elastic recoil, forming a smooth, blunt tip for safe insertion into the eye.

[0058] See Figure 4 and Figure 5 Specifically, the net petals 401 consist of two pieces, each with a semi-circular structure and symmetrically arranged along the opening and closing direction, so that the two net petals 401 form a "bullet head" structure when closed. The outer diameter of the closed capture head 4 is less than or equal to the diameter of the straight rod end of the rod body 2.

[0059] See Figure 8The transmission assembly 3 includes at least one steel wire 301 and a moving block 302. The steel wire 301 is slidably disposed within the channel 201. The moving block 302 has a columnar structure and is slidably disposed within the groove 103 of the operating part 101. One end of the steel wire 301 is connected to the elastic sheet 402, and the other end of the steel wire 301 is connected to the end of the moving block 302. The control element 5 is connected to the moving block 302. When the doctor operates the control element 5 on the handle 1, the steel wire 301 pushes the mesh flap 401 to open elastically like a fish mouth. When the doctor releases the control element 5 on the handle 1, the mesh flap 401 closes rapidly under the action of elastic force, trapping any foreign objects that have entered between the mesh flaps 401.

[0060] Specifically, see Figure 8 The end of the steel wire 301 is detachably threaded to the movable block 302 via the connector 303, so as to facilitate the disassembly and separation of the steel wire 301 and the movable block 302.

[0061] Specifically, see Figure 5 When closed, the two semi-circular mesh petals 401 form a bullet shape, with the maximum outer diameter matching that of the rod 2, ensuring smooth insertion. The mesh petals 401 are woven from nickel-titanium alloy wire with a diameter of approximately 0.03 mm and a mesh size of approximately 0.2 mm. The base of the mesh petals 401 is fixedly connected to one end of the steel wire 301 by micro-rivets or welding.

[0062] The operating principle of this utility model:

[0063] Taking the 25G specification intraocular foreign body catcher as an example, it is suitable for most routine intraocular foreign body removal surgeries. The outer diameter of the rod 2 is approximately 0.51mm, and the length is approximately 200mm to meet the depth requirements of intraocular operations.

[0064] Preoperative preparation: The doctor selects an appropriate model of catcher based on the size and location of the foreign body in the patient's eye and the specifications of the surgical incision.

[0065] Insertion of the instrument: Under the observation of a surgical microscope, the doctor slowly inserts the closed capture head 4 into the patient's eye through the corresponding 25G puncture cannula. Because the retinal flap 401 is closed at this time and the tip is smooth, scratching the retina or lens can be effectively avoided.

[0066] Positioning and capture: The doctor manipulates the microsurgical instrument to move the capture head 4 to the front or side of the foreign object in the eye. After confirming the position, the doctor pushes or presses the control 5 on the handle 1 forward to open the two mesh petals 401, forming a "fish mouth" structure. Then, the doctor aligns the opened mesh petals 401 with the foreign object and captures it.

[0067] Foreign object removal: After confirming that the foreign object has entered between the mesh flaps 401, the doctor releases the control component 5. Under the action of elastic force, the mesh flaps 401 quickly close, firmly trapping the foreign object inside the mesh. Then, the doctor slowly removes the catcher along with the foreign object from the eye.

[0068] Postoperative management: After the foreign body is removed, the control piece 5 on the handle 1 can be operated again to open the mesh flap 401 and release the foreign body from the mesh for subsequent pathological examination or treatment.

[0069] Example 2:

[0070] As another embodiment of this utility model, such as Figures 1 to 9 As shown, the control component 5 is a slider with a ring structure. The slider is slidably mounted on the outer wall of the operating part 101. The operating part 101 is provided with at least one strip-shaped limiting hole 104 that communicates with the slide groove 103. The slider is connected to the moving block 302 through the strip-shaped limiting hole 104 by a pin or screw, so as to push the slider to drive the moving block 302 to move forward and backward in the slide groove 103, thereby controlling the steel wire 301 to move in the channel 201 in the rod body 2 to transmit force to the catching head 4, so that the catching head 4 opens to form a fish mouth structure to catch foreign objects in the eye.

[0071] Specifically, see Figure 9 An annular groove is provided on the outer ring of the operating part 101, and the slider slides within the annular groove to limit the movement of the slider.

[0072] The handle 1 in this embodiment adopts an ergonomic design, making it easy for doctors to hold for extended periods. A slider 5, which can slide back and forth on the operating part 101 of the handle 1, serves as a control element. The slider is connected to a moving block 302 via a pin or screw. When the doctor pushes the slider forward, the slider pushes the moving block 302, causing the steel wire 301 to move. The steel wire 301 transmits force to the root of the mesh 401, causing the two mesh 401 to extend towards the distal end of the rod 2 and open to both sides under the elastic action of the elastic sheet 402 or the nickel-titanium alloy, with a maximum opening angle of 45 degrees. When the doctor releases the slider, the mesh 401 automatically returns to its closed state under the memory effect of the elastic sheet 402 or its own nickel-titanium alloy.

[0073] See Figure 8 and Figure 9 A spring 6 is connected inside the slide groove 103, and the end of the spring 6 is connected to the end of the moving block 302. By setting the spring 6, when the slider loses the external force, the spring 6 contracts and drives the moving block 302 to move its end inside the slide groove 103, thereby driving the steel wire 301 to pull the elastic sheet 402 to retract into the rod body 2, so that the mesh petals 401 will close naturally.

[0074] Furthermore, the far end of the channel 201 of the rod body 2 is chamfered, so that when the elastic sheet 402 contracts and enters the rod body 2, the mesh petals 401 can be closed.

[0075] This embodiment proposes a method in which the control element 5 pushes the grabbing head 4 to open and capture the intraocular foreign body by sliding, which allows doctors to operate the intraocular foreign body grabbing device with one hand.

[0076] Example 3:

[0077] As another embodiment of this utility model, such as Figures 10 to 13 As shown, the control element 5 is an elastic pressing strip, which is located on both sides or one side of the operating part 101. One end of the elastic pressing strip is connected to the gripping part 102. The elastic pressing strip is hinged to the moving block 302 via the hinge rod 7. When the hand presses the elastic pressing strip, it pushes the hinge rod 7 to drive the moving block 302 to move forward in the slide groove 103, thereby pushing the steel wire 301 to move in the channel 201 to control the capture head 4 to extend out of the rod body 2 and open to cover the foreign object in the eye. When the elastic pressing strip is released, the elastic pressing strip, under the force of the sheet elastic element 502 connected to the gripping part 102, drives the hinge rod 7 to move to drive the moving block 302 back to its original position, thereby driving the capture head 4 to retract so that the elastic sheet 402 on it enters the rod body 2, so that the capture head 4 closes.

[0078] Specifically, see Figure 12 The pressing part of the elastic pressing strip is provided with an arc-shaped protrusion, and multiple arc-shaped grooves are evenly distributed along the axial direction on the arc-shaped protrusion to increase the friction.

[0079] See Figure 12 The elastic pressing strip is provided with a strip groove 501. One end of the hinge rod 7 is hinged to the inner wall of the strip groove 501 so that when the elastic pressing strip is pressed, the hinge rod 7 can enter the strip groove 501 when rotating, without interfering with the elastic pressing strip.

[0080] This embodiment proposes a method of using a pressing mechanism to push the control element 5 to open the grabbing head 4 and capture the intraocular foreign body. This method also allows doctors to operate the intraocular foreign body grabbing device with one hand.

[0081] Example 4:

[0082] As another embodiment of this utility model, such as Figure 6 and Figure 9 as well as Figure 12 As shown, the operating part 101 has an external thread protruding from its end, and the connecting part 202 has an internal thread hole. The handle 1 is detachably threaded to the rod 2 through the external thread and the internal thread hole, so as to realize the detachable connection between the handle 1 and the rod 2, so as to facilitate the daily disassembly, cleaning, maintenance and replacement of parts of the intraocular foreign body catcher.

[0083] Specifically, when it is necessary to disassemble the handle 1 or the rod 2, first remove the control component 5 from the control component 5, and then rotate the handle 1 to disengage it from the rod 2. At this time, the handle 1 and the rod 2 can be disassembled and separated. Alternatively, the capture head 4 and the wire 301 can be removed from the rod 2 by disassembling the connector 303 fixedly connected to the end of the wire 301 from the moving block 302.

[0084] This embodiment proposes a detachable intraocular foreign body catcher. By disassembling the handle 1 and the rod 2, as well as the steel wire 301 and the moving block 302, multiple components can be disassembled, which facilitates daily cleaning, disinfection, maintenance, and replacement of damaged parts of the intraocular foreign body catcher.

[0085] The above description is merely a preferred embodiment of this utility model and does not constitute any limitation on this utility model. Any person skilled in the art can make many possible variations and modifications to the technical solution of this utility model, or modify it into equivalent embodiments, without departing from the scope of the technical solution of this utility model. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technology of this utility model without departing from the scope of the technical solution of this utility model shall fall within the protection scope of this technical solution.

Claims

1. An intraocular foreign body catcher, characterized in that, include: The handle (1) has an operating part (101) and a gripping part (102). The rod (2) has a through channel (201) and a connecting part (202), and the operating part (101) is connected to the connecting part (202); The transmission assembly (3) passes through the channel (201) and is connected to the handle (1); The capture head (4) is located at the far end of the rod (2) and is connected to the transmission assembly (3); A control element (5) is provided on the handle (1) and connected to the transmission assembly (3); The control element (5) is configured to receive an external force to drive the transmission assembly (3) to push the grabbing head (4) to open and catch the foreign object in the eye. When the external force disappears, the control element (5) elastically returns to its original position to close the grabbing head (4) and catch the foreign object. The capture head (4) includes two net petals (401), the ends of which are connected to the transmission assembly (3) via elastic plates (402) so that the net petals (401) open by moving outward to the far end of the rod (2) and close by contracting inward to the rod (2); Both of the mesh petals (401) are semi-arc structures and are symmetrically arranged along the opening and closing direction so that the two mesh petals (401) form a "bullet head" structure after being closed.

2. The intraocular foreign body catcher according to claim 1, characterized in that, The transmission assembly (3) includes at least one steel wire (301) and a moving block (302). The steel wire (301) is slidably disposed in the channel (201), and the moving block (302) is slidably disposed in the groove (103) of the operating part (101). One end of the steel wire (301) is connected to the elastic sheet (402), and the other end of the steel wire (301) is connected to the end of the moving block (302). The control element (5) is connected to the moving block (302).

3. The intraocular foreign body catcher according to claim 2, characterized in that, The control component (5) is a slider, which has a ring structure. The slider is slidably disposed on the outer wall of the operating part (101). The operating part (101) is provided with at least one strip-shaped limiting hole (104) communicating with the slide groove (103). The slider is connected to the moving block (302) by passing through the strip-shaped limiting hole (104) with a pin or screw.

4. The intraocular foreign body catcher according to claim 3, characterized in that, A spring (6) is connected inside the slide (103), and the end of the spring (6) is connected to the end of the moving block (302).

5. The intraocular foreign body catcher according to claim 2, characterized in that, The control element (5) is an elastic pressing strip, which is located on both sides or one side of the operation part (101). One end of the elastic pressing strip is connected to the gripping part (102). The elastic pressing strip is hinged to the moving block (302) through the hinge rod (7).

6. The intraocular foreign body catcher according to claim 5, characterized in that, The elastic pressing strip is provided with a strip groove (501), and one end of the hinge rod (7) is hinged to the inner wall of the strip groove (501).

7. The intraocular foreign body catcher according to claim 3 or 5, characterized in that, The operating part (101) has an external thread protruding from its end, and the connecting part (202) has an internal thread hole. The handle (1) is detachably threaded to the rod body (2) through the external thread and the internal thread hole.

8. The intraocular foreign body catcher according to claim 1, characterized in that, The outer diameter of the closed capture head (4) is less than or equal to the diameter of the straight rod end of the rod body (2).

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