Anterior chamber liquid extractor capable of being operated by one hand and achieving quantitative extraction
By designing a pre-atrial fluid extractor that can be operated with one hand, and using a slider and rail structure to achieve quantitative extraction, the accuracy and safety issues in existing technologies are solved, and the safety and efficiency of operation are improved.
Patent Information
- Application Number
- CN202422945583.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2034-11-29
AI Technical Summary
Existing technologies for extracting pre-atrial fluid have problems such as difficulty in controlling accuracy, the need for two-handed operation, and safety hazards.
A precordial fluid extractor that can be operated with one hand was designed. It uses a slider and slide rail structure to achieve quantitative extraction, and combined with limiters and scale marks, it ensures accurate and safe extraction.
It enables precise quantitative extraction of pre-atrial fluid, improving operational safety and efficiency, reducing patient discomfort, and avoiding risks associated with two-handed operation.
Smart Images
Figure CN223654037U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a medical auxiliary device, and more particularly to an anterior chamber fluid extractor that can be operated with one hand and can extract a quantitative amount of fluid, suitable for ophthalmic examinations. Background Technology
[0002] Anterior chamber fluid primarily fills the space between the cornea, iris, and lens of the human eye, with a total volume of approximately 0.15–0.3 ml. The extraction and examination of anterior chamber fluid is a commonly used diagnostic method in ophthalmology, used to examine diseases such as intraocular infections, uveitis, and lymphoma.
[0003] Currently, in clinical practice, syringes with 25-30 gauge needles and a capacity of 1 ml are commonly used to extract anterior chamber fluid. The following problems often arise during the use of these syringes and the extraction process:
[0004] (1) The scale of a regular syringe is not easy to observe, and it is difficult to accurately control the amount drawn during the extraction. (2) When drawing fluid from the anterior chamber, medical staff need to observe the scale, the changes in the depth of the anterior chamber, and the position of the needle in the anterior chamber at the same time. If the observation is not done properly, it is easy to cause excessive backflow of fluid from the anterior chamber, resulting in anterior chamber collapse or changes in the direction of the needle, causing irreversible damage to the eyes. (3) The method of drawing fluid using a regular syringe requires both hands to operate. When operating with both hands, the medical staff performing the extraction operation cannot fix the patient's eyeball. If the patient moves their eyes, the needle may move in the anterior chamber, causing iris hemorrhage, lens damage, and other safety hazards.
[0005] Therefore, there is an urgent need to develop a pre-atrial fluid extractor that can precisely control the extraction volume and enable one-handed operation to reduce the risk of fluid extraction. Utility Model Content
[0006] The purpose of this invention is to provide a pre-atrial fluid extractor that can precisely control the extraction volume, is simple and quick to operate, and can be operated with one hand to eliminate safety hazards.
[0007] To achieve the above objectives, this utility model provides a pre-atrial fluid extractor that can be operated with one hand and can extract a quantitative amount of fluid, which includes a syringe, a push rod element and a puncture needle fixed to the front end of the syringe.
[0008] The push rod element includes a piston adapted to the inner diameter of the syringe, a piston rod whose front end is rotatably connected to the piston, and a slider connected to the rear end of the piston rod for pulling / pushing the piston rod to achieve the extraction of anterior chamber fluid;
[0009] A slide rail is provided on the inner wall of one side of the rear section of the syringe. A through groove is opened on the other side of the rear section of the syringe, which is opposite to the slide rail and has the same shape as the slide rail. One end of the slider is slidably locked in the slide rail, and the other end of the slider passes through the through groove and protrudes out of the syringe for pulling / pushing the piston rod. The slide rail includes a first slide rail arranged along the axial direction of the syringe. The end of the first slide rail extends radially along the syringe to form a transition slide rail. The transition slide rail extends axially along the syringe to form a second slide rail.
[0010] Compared to existing technologies, this invention innovatively introduces an anterior chamber fluid aspirator that can be operated with one hand and achieves quantitative extraction, addressing safety requirements during anterior chamber fluid extraction. During the extraction process, medical personnel insert the needle horizontally at the 5 o'clock position of the transparent limbus. Once the needle tip enters the anterior chamber, the index finger can be used to push the slider along the axial direction of the syringe barrel. This slider drives the piston, thus extracting the anterior chamber fluid. The slider first slides in the first slide rail. When the slider reaches the end of the first slide rail and enters the transition slide rail, the slider is restricted in the axial direction of the syringe barrel, and the extraction stops. At this point, the extracted anterior chamber fluid volume reaches the first quantitative value. If further atrial fluid needs to be extracted, medical staff can push the slider along the transition rail to the second rail. Simultaneously, the slider's movement causes the piston rod to rotate, facilitating a second extraction. At this point, the piston remains stationary, ensuring the airtightness of the already extracted portion of the syringe and the purity of the extracted fluid. When the slider returns to the initial position of the second rail, medical staff can then extract a second quantitative amount of atrial fluid by pushing the slider along the second rail again. The sum of the first and second quantitative values corresponding to the slider sliding through the first and second rails is set to an appropriate amount lower than the total volume of atrial fluid, thus avoiding over-extraction that could cause anterior chamber collapse or disappearance.
[0011] Throughout the entire aspiration process, medical staff do not need to be distracted by observing the sliding of the slider; they only need to observe the position of the needle tip. This allows for greater concentration during aspiration. The transition rail's blocking effect prevents over-aspiration due to negligence on the part of the medical staff, thus improving the safety of the aspiration operation. Furthermore, based on this invention, medical staff can complete the entire aspiration of anterior chamber fluid with just one hand. During the aspiration process, medical staff can simultaneously collect the fluid with one hand and stabilize the patient's eyeball with the other, further enhancing safety and eliminating the inconvenience of using both hands under a slit lamp in clinical practice. This promotes a smoother and more efficient procedure, reducing patient discomfort.
[0012] As can be seen from the above, in the pre-atrial fluid extractor of this utility model that can be operated with one hand and achieves quantitative extraction, the fixed-length slide rail with transition slide rail simplifies the operation process of extracting pre-atrial fluid and improves the safety of extraction. In this process, the medical staff performing the extraction operation can complete the entire extraction operation with one hand, thus having more spare capacity to simultaneously complete the auxiliary operations required for extraction, and the extraction efficiency is significantly improved.
[0013] Specifically, the amount of anterior chamber fluid extracted when the slider slides through the first slide rail or the second slide rail is 0.05 ml.
[0014] Specifically, the outer wall of the syringe is also provided with a scale corresponding to the length of the first slide rail and the second slide rail for the extraction value. Based on this scale, the extracted amount can be further confirmed to avoid missed extractions and over-extractions.
[0015] Specifically, the puncture needle is provided with a limiter for restricting the puncture depth of the puncture needle. The limiter covers the rear part of the puncture needle and is tightly fixed to the puncture needle. During puncture, the limiter can limit the depth to which the puncture needle penetrates into the eye, thereby protecting the eyeball.
[0016] Furthermore, the limiter is made of silicone.
[0017] Specifically, the syringe tip is also equipped with a detachable needle cap for dust and impact protection. The needle cap is preferably made of plastic, is connected to the syringe, and protects the puncture needle from dust and prevents accidental injury from the puncture needle. Attached Figure Description
[0018] Figure 1 This is a side view of the pre-atrial fluid extractor of this invention, which can be operated with one hand and achieves quantitative extraction.
[0019] Figure 2 This is a top view of the pre-atrial fluid extractor of this invention, which can be operated with one hand and achieves quantitative extraction.
[0020] Figure 3 This is a schematic diagram of the puncture needle in the pre-atrial fluid extractor of this utility model, which can be operated with one hand and achieves quantitative extraction. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to specific embodiments and accompanying drawings, and the technical solutions of the present utility model will be explained. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model. The specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present utility model. Therefore, the present utility model is not limited to the specific embodiments disclosed below. Embodiments of the present utility model will now be described with reference to the accompanying drawings, in which similar element reference numerals represent similar elements.
[0022] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0023] Please see Figures 1 to 3 As shown, the pre-atrial fluid extractor of this invention, which can be operated with one hand and achieves quantitative extraction, provides a simple and quick extraction device for pre-atrial fluid extraction, reducing the risk of extraction and ensuring the safety and efficiency of the extraction operation. The pre-atrial fluid extractor of this invention, which can be operated with one hand and achieves quantitative extraction, includes a syringe 1, a push rod element 2, and a puncture needle 3 fixed to the front end of the syringe 1.
[0024] Specifically, the push rod element 2 includes a piston 21 adapted to the inner diameter of the syringe 1, a piston rod 22 whose front end is rotatably connected to the piston 21, and a slider 23 connected to the rear end of the piston rod 22 for pulling / pushing the piston rod 22 to achieve the extraction of precordial fluid.
[0025] Specifically, a slide rail 11 is provided on the inner wall of one side of the rear section of the syringe 1, and a through groove is opened on the other side of the rear section of the syringe 1, which is directly opposite to the slide rail 11 and has the same shape as the slide rail 11. One end of the slider 23 is slidably locked in the slide rail 11, and the other end of the slider 23 passes through the through groove and protrudes out of the syringe 1 for pulling / pushing the piston rod 22.
[0026] The slide rail 11 includes a first slide rail 111 arranged along the axial direction of the syringe 1, the end of the first slide rail 111 extending radially along the syringe 1 to form a transition slide rail 113, and the transition slide rail 113 extending axially along the syringe to form a second slide rail 112.
[0027] In the use of this utility model, medical personnel hold the anterior chamber fluid extractor, which can be operated with one hand and allows for quantitative extraction, and insert the needle horizontally at the 5 o'clock position of the transparent limbus. After the tip of the puncture needle 3 enters the anterior chamber, the index finger can be used to push the slider 23 along the axial direction of the syringe 1. This allows the slider 23 to drive the piston 21, thereby extracting the anterior chamber fluid. The slider 23 first slides in the first slide rail 111. When the slider 23 slides to the end of the first slide rail 111 and reaches the transition slide rail 113, the slider 23 is restricted in the axial direction of the syringe 1, and the extraction stops. At this time, the amount of anterior chamber fluid extracted reaches the first quantitative value. If the amount of precordial fluid drawn is insufficient and further drawing is required, slider 23 can be moved along transition rail 113 to the second rail 112. Simultaneously, the sliding motion of slider 23 drives piston rod 22 to rotate, facilitating a second drawing operation. At this time, piston 21 remains stationary, ensuring the airtightness of the already drawn fluid portion inside syringe 1 and the purity of the drawn fluid. When slider 23 reaches the initial position of the second rail 112, medical personnel can use their index finger to push slider 23 along rail 112 again, causing slider 23 to drive piston 21 to continue drawing precordial fluid until slider 23 reaches the end of rail 112. The sum of the drawing volumes corresponding to slider 23 sliding through the first rail 111 and the second rail 112 is set to an appropriate value lower than the total amount of precordial fluid, thereby avoiding over-drawing. Throughout the entire aspiration process, medical staff do not need to be distracted by observing the sliding of slider 23 but only need to observe the position of the needle tip of puncture needle 3, allowing for greater concentration. The blocking effect of transition rail 113 prevents excessive aspiration due to negligence on the part of medical staff, thus improving the safety of the aspiration operation. At the same time, based on this invention, medical staff can complete the entire operation of atrial fluid aspiration with one hand. During the aspiration process, medical staff can use one hand to collect the fluid while the other hand fixes the patient's eyeball, further enhancing safety, eliminating the inconvenience of two-handed operation under slit lamp in clinical practice, promoting the smooth progress of the operation, enhancing fluidity, and reducing patient discomfort.
[0028] As can be seen from the above, in the preauricular fluid extractor of this utility model that can be operated with one hand and achieve quantitative extraction, the fixed-length slide rail 11 with the transition slide rail 113 simplifies the operation process of extracting preauricular fluid and improves the safety of extraction. In this process, the medical staff performing the extraction operation can complete all the extraction operations with one hand, so that they have more spare capacity to simultaneously complete the auxiliary operations required for extraction, and the extraction efficiency is significantly improved.
[0029] Specifically, the volume of anterior chamber fluid extracted when slider 23 slides through the first slide rail 111 or the second slide rail 112 is 0.05 ml.
[0030] Specifically, the outer wall of the syringe 1 is also provided with a scale 12 corresponding to the length of the first slide rail 111 and the second slide rail 112. Based on this scale 12, the amount extracted can be further confirmed to avoid missed extractions and over-extractions.
[0031] Specifically, the puncture needle 3 is provided with a limiter 31 for restricting the puncture depth of the puncture needle 3. The limiter 31 covers the rear part of the puncture needle 3 and is tightly fixed to the puncture needle 3. During puncture, the limiter 31 can engage at the limbus of the puncture site, thereby limiting the depth of the puncture needle 3 entering the eye and playing a protective role. The limiter 31 is preferably a flexible silicone structure.
[0032] Specifically, the syringe 1 is also provided with a detachable needle cap 4 for dust and impact protection. The needle cap 4 is preferably made of plastic and is connected to the syringe 1, protecting the puncture needle 3 from dust and preventing accidental injury from the puncture needle 3.
[0033] The following is a brief description of the use of the pre-atrial fluid extractor, which can be operated with one hand and achieves quantitative extraction, in the pre-atrial fluid extraction operation in this embodiment of the present invention, so as to facilitate understanding of the present invention. It should not be regarded as a limitation of the present invention.
[0034] First, the patient is given topical anesthesia. Then, necessary preparatory procedures are performed on the operated eye, such as skin disinfection, antibiotic eye drops, and conjunctival sac irrigation. The patient is then seated in front of the slit lamp with their chin resting on the chin rest of the slit lamp and their forehead against the forehead rest. The slit lamp light source is then turned on.
[0035] Next, the anterior chamber fluid extractor of this invention, which can be operated with one hand and can achieve quantitative extraction, is taken out. The needle cap 4 is pulled out and the patient is instructed to keep turning their eyeball upward. The medical staff pinches the syringe 1 of this invention with one hand, so that the bevel of the needle tip 3 faces the medical staff and is inserted into the eye from the horizontal direction of the transparent limbus at the 5 o'clock position of the patient. After the part of the needle tip punctures into the anterior chamber, the limiter 31 is naturally locked at the limbus of the puncture site to prevent the puncture needle 3 from entering the eye too deeply.
[0036] Furthermore, after stabilization, medical staff use their index finger to move slider 23 along the first slide rail 111. When slider 23 slides to the end of the first slide rail 111, slider 23 stops at the beginning of the transition slide rail 113 and no longer moves. At this time, the amount of anterior chamber fluid extracted reaches 0.05ml, and the puncture needle 3 can be pulled out to end the anterior chamber fluid extraction operation. If a volume of 0.1 ml of pre-atrial fluid needs to be extracted, when the slider 23 touches the end of the first slide rail 111, use your index finger to push the slider 23 along the transition slide rail 113 towards the second slide rail 112 to enter the second slide rail 112. At the same time, as the slider 23 moves radially, the piston rod 22 rotates to facilitate the extraction of the second pre-atrial fluid. At this time, the piston 21 remains stationary, ensuring the airtightness of the liquid already collected inside the syringe 1 and the purity of the extracted pre-atrial fluid. Continue to pull the slider 23 backward along the second slide rail 112 until the slider 23 touches the end of the second slide rail 112. At this time, the volume of pre-atrial fluid extracted reaches 0.1 ml. Pull out the puncture needle 3 to complete the extraction operation of the pre-atrial fluid.
[0037] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0038] Meanwhile, the above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent changes made in accordance with the scope of the present utility model patent application shall still fall within the scope of the present utility model.
Claims
1. A pre-atrial fluid extractor that can be operated with one hand and achieves quantitative extraction, characterized in that, It includes a syringe, a push rod element, and a puncture needle fixed to the front end of the syringe; The push rod element includes a piston adapted to the inner diameter of the syringe, a piston rod whose front end is rotatably connected to the piston, and a slider connected to the rear end of the piston rod for pulling / pushing the piston rod to achieve the extraction of anterior chamber fluid; A slide rail is provided on the inner wall of one side of the rear section of the syringe. A through groove is opened on the other side of the rear section of the syringe, which is opposite to the slide rail and has the same shape as the slide rail. One end of the slider is slidably locked in the slide rail, and the other end of the slider passes through the through groove and protrudes out of the syringe for pulling / pushing the piston rod. The slide rail includes a first slide rail arranged along the axial direction of the syringe. The end of the first slide rail extends radially along the syringe to form a transition slide rail. The transition slide rail extends axially along the syringe to form a second slide rail.
2. The pre-atrial fluid extractor that can be operated with one hand and achieves quantitative extraction as described in claim 1, characterized in that, The volume of anterior chamber fluid extracted when the slider slides across the first or second slide rail is 0.05 ml.
3. The pre-atrial fluid extractor that can be operated with one hand and achieves quantitative extraction as described in claim 1, characterized in that, The outer wall of the syringe is also provided with a scale for the extraction value corresponding to the length of the first slide rail and the second slide rail.
4. The pre-atrial fluid extractor that can be operated with one hand and achieves quantitative extraction as described in claim 1, characterized in that, The puncture needle is provided with a limiter for limiting the puncture depth of the puncture needle.
5. The pre-atrial fluid extractor that can be operated with one hand and achieves quantitative extraction as described in claim 4, characterized in that, The limiter is made of silicone.
6. The pre-atrial fluid extractor that can be operated with one hand and achieves quantitative extraction as described in claim 1, characterized in that, The syringe is also equipped with a detachable needle cap for dust and impact protection.