Corneal astigmatism marking pen
By designing a corneal astigmatism marking pen, the elastic-driven marking piston is closed at the front opening of the cavity, marking and dyeing is achieved in one step, solving the problem of the waste of corneal and consumables by sharp needle scratching, and improving operational safety and efficiency.
Patent Information
- Application Number
- CN202421991637.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-16
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-08-16
AI Technical Summary
Prior art When marking the direction of corneal astigmatism, there is a risk that sharp needles may scratch the corneal epithelium, and separation of marking and staining steps leads to waste of consumables and complex operation.
A corneal astigmatism marking pen is designed, and a marking piston driven by elastic parts is closed at the front opening of the cavity. After the head of the marking piston is compressed, it forms a gap with the apical wall. The dye forms a marking line on the cornea along the astigmatism direction, and combines the marking and dyeing steps.
It has achieved one-step completion of marking and dyeing, reducing the risk of corneal scratches, saving medical consumables, and simplifying the operation process.
Smart Images
Figure CN223041706U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of medical devices, and particularly to a corneal astigmatism marking pen. Background Art
[0002] For cataract patients who choose to implant toric intraocular lenses, before implanting the toric intraocular lens, it is necessary to mark the astigmatism direction at the corneal limbus.
[0003] The traditional marking method is as follows: Use the tip of a 1-ml syringe needle to gently scratch the corneal limbus to form a strip-shaped scratch, and then use a skin marker pen to color the scratch to make it stained.
[0004] The problems existing in this method include:
[0005] 1. Since the 1-ml syringe needle is extremely sharp, when scratching the corneal limbus, due to factors such as sudden rotation of the patient's eyeball or the operator's inexperience, a large area of the corneal epithelium may be scratched or even scraped off, causing foreign body sensation in the patient's eyes or even iatrogenic infection. When recycling the 1-ml syringe needle, it may stab medical staff, resulting in the possibility of occupational exposure. In addition, each patient needs to prepare 1 1-ml syringe and 1 skin marker pen, both of which need to be discarded after use and cannot be recycled, resulting in a huge consumption of medical consumables;
[0006] 2. After forming an indentation at the corneal limbus, coloring still needs to be carried out. It cannot achieve the operation of combining indentation and coloring in one step. Utility Model Content
[0007] To solve the above technical problems, the purpose of the present utility model is to provide a corneal astigmatism marking pen, which can combine the marking step and the staining step into one, and is simple and convenient to operate.
[0008] The technical solution provided by the present utility model is as follows:
[0009] A corneal astigmatism marking pen is provided with a cavity for accommodating a dye. The bottom end of the cavity is closed, and the top end is provided with a top wall. The middle part of the top wall is provided with a front opening. At the front opening, there is a marking piston and an elastic member. The marking piston has a head and a handle. The size of the head is smaller than the front opening, and the size of the handle is larger than the front opening. The head is embedded outwardly in the front opening. The elastic member is located inside the cavity, one end is connected to the handle of the marking piston, and the other end is connected to the inner wall of the cavity. The marking piston closes the cavity under the action of the elastic member, and a gap is formed between the head of the marking piston and the top wall after being pressed for the dye in the cavity to flow out, so that the corneal astigmatism marking pen moves along the astigmatism direction to form a marking line on the cornea.
[0010] Preferably, the corneal astigmatism marking pen has a closed state and a working state. In the closed state, the elastic member pushes the marking piston handle to abut against the top wall to seal the cavity. When the marking piston presses on the cornea, the corneal astigmatism marking pen is in the working state, the head of the marking piston is lifted under pressure, and the dye in the cavity flows out through the gap between the head of the marking piston and the top wall.
[0011] Preferably, a rear opening for injecting the dye is provided at the bottom end of the cavity, and a closing piston is provided at the rear opening. The bottom end of the cavity is sealed by plugging the rear opening with the closing piston.
[0012] Preferably, the top wall is inclined.
[0013] Preferably, the included angle between the top wall and the side wall is 45°.
[0014] Preferably, the elastic member is a spring.
[0015] Preferably, the connection between the top surface and the side wall of the head of the marking piston is a rounded corner.
[0016] Preferably, it includes a receiving tube and a holding part. The cavity is formed inside the receiving tube, and the holding part wraps around the bottom of the receiving tube for an operator to hold.
[0017] Preferably, it includes a front end part and a rear end part that are both hollow. The front end part and the rear end part are connected as a whole, and the hollow parts of both form the cavity. The rear end part has a larger diameter to form a holding part for an operator to hold.
[0018] Compared with the prior art, for the corneal astigmatism marking pen of the present utility model, by providing a marking piston and an elastic member at the front opening of the cavity, the marking piston seals the cavity under the action of the elastic member, and a gap is formed between the head of the marking piston and the top wall after the head of the marking piston is pressed, so that the dye in the cavity can flow out. By moving along the astigmatism direction, a marking line is formed on the cornea. In this way, the marking step and the staining step can be combined into one, and the operation is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments recorded in the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0020] Figure 1 It is a schematic structural diagram of the corneal astigmatism marking pen in the closed state according to the embodiment of the present utility model;
[0021] Figure 2For Figure 1 Schematic structural diagram of the corneal astigmatism marker pen shown in the working state;
[0022] Figure 3 For Figure 1 Schematic diagram of the corneal astigmatism marker pen shown for corneal marking;
[0023] Figure 4 For Figure 1 Schematic diagram of the corneal astigmatism marker pen shown after completing corneal marking. Specific embodiments
[0024] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.
[0025] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly disposed on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.
[0026] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this application.
[0027] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality of", "several" means two or more, unless otherwise specifically defined.
[0028] It should be noted that the structures, proportions, sizes, etc. shown in the attached drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the implementation conditions of this application. Therefore, they do not have any technical substantial significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the efficacy that this application can produce and the purpose that can be achieved, should still fall within the scope covered by the technical content disclosed in this application.
[0029] As Figures 1 to 4 shown, an embodiment of the present invention provides a corneal astigmatism marking pen, which is provided with a cavity 1 for accommodating a dye.
[0030] In this embodiment, the corneal astigmatism marking pen includes a receiving tube 2 and a holding portion 3. A cavity 1 is formed inside the receiving tube 2, and the holding portion 3 is wrapped around the bottom of the receiving tube 1 for an operator to hold. In other embodiments, other structures can also be adopted. For example, the corneal astigmatism marking pen includes a front end portion and a rear end portion that are both hollow. The front end portion and the rear end portion are connected as a whole (the two can be integrally formed or separately formed and then assembled). The hollow portions of the two form a cavity, and the rear end portion has a larger diameter to form a holding portion for an operator to hold.
[0031] The bottom end of the cavity 1 is closed. In this embodiment, it is closed by a closing piston 6. Specifically, a rear opening for injecting the dye is provided at the bottom end of the cavity 1, and a closing piston 6 is provided at the rear opening. The bottom end of the cavity 1 is closed by blocking the rear opening with the closing piston 6. Of course, in other embodiments, other structures can also be used for closing. For example, the bottom end of the cavity is closed by itself without a rear opening, and the dye is injected from the front opening. The top end of the cavity 1 is provided with a top wall 11, and a front opening 12 is provided in the middle of the top wall 11. In this embodiment, the top wall 11 is inclined, making the marking operation more convenient. The included angle between the top wall 11 and the side wall 13 can be 45°.
[0032] A marking piston 4 and an elastic member 5 are provided at the front opening 12. The marking piston 4 has a head 41 and a shank 42. The size of the head 41 is smaller than that of the front opening 12, and the size of the shank 42 is larger than that of the front opening 12. And the head 41 is embedded in the front opening 12 outwardly. The connection between the top surface of the head 41 and the side wall is a rounded corner.
[0033] The elastic member 5 (a spring in this embodiment) is located inside the cavity 1, one end is connected to the shank 42 of the marking piston 4, and the other end is connected to the inner wall of the cavity 1.
[0034] In this way, the marking piston 4 closes the cavity 1 under the action of the elastic member, and a gap is formed between the head 41 of the marking piston 4 and the top wall 11 after being pressed, allowing the dye in the cavity to flow out, so that the corneal astigmatism marker pen moves along the astigmatism direction to form a marking line on the cornea. That is, the corneal astigmatism marker pen has a closed state and a working state. In the closed state, the elastic member 5 pushes the handle portion 42 of the marking piston to abut against the top wall 11 to close the cavity 1. When the marking piston 4 presses on the cornea, the corneal astigmatism marker pen is in the working state, and the head 41 of the marking piston 4 is lifted under pressure, and the dye in the cavity 1 flows out from the gap between the head 41 of the marking piston and the top wall 11.
[0035] The usage process of the corneal astigmatism marker pen in this embodiment is described as follows.
[0036] When performing limbus marking, the marker holds the holding portion 3 of the marker pen, aligns the gap formed between the head 41 of the marking piston and the top wall 11 after being pressed (that is, the junction where the head of the marking piston and the top wall are located on the lower side) with the corneal 7 corresponding to the slit lamp light band, and gently presses down. At this time, the marking piston 4 is lifted under pressure, and the dye flows out from the gap, causing the corneal indentation to be stained and forming a marking line 8 (as Figure 3 )
[0037] After the marking is completed, the marker pen is lifted, and the marking piston 4 falls back under the action of the spring resilience, closing the gap between the head 41 of the marking piston and the top wall 11, and the dye no longer flows out (as Figure 4 )
[0038] After the marking is completed, the marker pen can be sterilized by high temperature. After disinfection, open the closing piston 6 at the bottom of the holding portion 3 to inject the dye for the next use.
[0039] Compared with the prior art, the corneal astigmatism marker pen in this embodiment has the following advantages:
[0040] 1. The marking step and the staining step are combined into one, saving marking time;
[0041] 2. The marking part of the marker pen is designed with a rounded corner to avoid large-scale scratching of the corneal epithelium and stabbing of medical staff by sharp needles;
[0042] 3. It can be sterilized by high pressure and reused, saving the cost of medical consumables.
[0043] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.
Claims
1. A corneal astigmatism marking pen, characterized in that: A cavity for accommodating dye is provided, the bottom end of the cavity is closed, the top end is provided with a top wall, the middle part of the top wall is provided with a front opening, a marking piston and an elastic member are provided at the front opening, the marking piston has a head and a handle, the head is smaller than the front opening, the handle is larger than the front opening, and the head is embedded in the front opening outwardly, the elastic member is located in the cavity, one end is connected to the handle of the marking piston, and the other end is connected to the inner wall of the cavity; the marking piston closes the cavity under the action of the elastic member, and after the marking piston head is compressed, a gap is formed between the top wall for the dye in the cavity to flow out, so that the corneal astigmatism marking pen moves along the astigmatism direction to form a marking line on the cornea.
2. The corneal astigmatism marking pen according to claim 1, characterized in that: The corneal astigmatism marking pen has a closed state and a working state. In the closed state, the elastic member pushes the handle of the marking piston to abut against the top wall to close the cavity; when the marking piston is pressed on the cornea, the corneal astigmatism marking pen is in a working state, the head of the marking piston is lifted up by pressure, and the dye in the cavity flows out from the gap between the head of the marking piston and the top wall.
3. The corneal astigmatism marking pen according to claim 1, characterized in that: The bottom end of the cavity is provided with a rear opening for dye injection, and a closing piston is provided at the rear opening. The closing piston is blocked at the rear opening to close the bottom end of the cavity.
4. The corneal astigmatism marking pen according to claim 1, characterized in that: The top end wall is arranged in an inclined manner.
5. The corneal astigmatism marking pen according to claim 4, characterized in that: The angle between the top wall and the side wall is 45°.
6. The corneal astigmatism marking pen according to claim 1, characterized in that: The elastic member is a spring.
7. The corneal astigmatism marking pen according to claim 1, characterized in that: The connection between the top surface of the marking piston head and the side wall is rounded.
8. The corneal astigmatism marking pen according to any one of claims 1 to 7, characterized in that: It comprises a containing tube and a gripping portion, wherein the cavity is formed inside the containing tube, and the gripping portion is wrapped around the bottom of the containing tube for an operator to grip.
9. The corneal astigmatism marking pen according to any one of claims 1 to 7, characterized in that: It comprises a front end portion and a rear end portion, both of which are hollow. The front end portion and the rear end portion are connected as a whole, and the hollow portions of the two form the cavity. The rear end portion has a larger diameter to form a gripping portion for an operator to grip.