Aqueous humor quantitative collection device capable of precisely controlling pressure

Abstract

The present invention discloses a quantitative aqueous humor collection device capable of precisely controlling pressure, characterized in that it comprises: a limiting device installed on an adjusting device; a control button slidably sleeved on the adjusting device, and the control button can be rotated relative to the adjusting device to a locked working position or a start working position; a piston assembly passes through the limiting device and the adjusting device and is fixedly installed on the control button; a plurality of scale lines are provided on the outer wall of a suction cylinder, the suction cylinder is fixed to the adjusting device, and the suction cylinder is sleeved on the outside of the limiting device and the piston assembly; a liquid collecting assembly is installed on an end of the suction cylinder away from the adjusting device, and the liquid collecting assembly is connected to the suction cylinder. By using this device, intraoperative secondary injuries caused by movement of the patient's eyeball during surgery can be effectively avoided, while the loss of the amount of intraocular fluid sample collected by the syringe can be avoided. The volume of the sampled intraocular fluid and the reduced intraocular pressure level can also be precisely controlled. The operation process is convenient and quick, and the patient's pain is significantly reduced.

Description

Technical Field

[0001] The present invention relates to the field of medical devices and other related technical fields, and in particular to a device for quantitatively collecting aqueous humor capable of precisely controlling pressure. Background Art

[0002] Aqueous humor is a transparent fluid that fills the anterior and posterior chambers, with a volume of approximately 0.25 to 0.3 ml. It is continuously produced from within the eye and discharged to the outside, dynamically maintaining the balance of intraocular pressure. In clinical practice, when patients experience acute elevation of intraocular pressure and medication is ineffective in lowering blood pressure, anterior chamber paracentesis is often used to remove a small amount of aqueous humor to reduce intraocular pressure.

[0003] However, because topical anesthesia is often used during anterior chamber paracentesis and aqueous humor collection in ophthalmology exam rooms or operating rooms, and the procedure is performed one-handed under a slit lamp or surgical microscope, patients often experience involuntary eye movements due to nervousness during the procedure, which can lead to local eye injuries such as corneal epithelial scratches, conjunctival lacerations, and bleeding. For beginners or unskilled doctors, performing anterior chamber paracentesis can also have serious adverse consequences, such as damage to the lens, which can cause cataracts and decreased vision, and damage to the iris, which can cause anterior chamber hemorrhage. Currently, there is no medical device specifically used for collecting aqueous humor or puncturing the anterior chamber in clinical operations. The insulin syringes or 1ml syringe needles currently used have simple structures and cannot accurately control the volume of aqueous humor collected. It is easy for intraocular pressure to be reduced too little or too low. Repeated punctures are often required to collect a certain amount of aqueous humor or reduce intraocular pressure to the expected level. At the same time, an overly long needle makes it difficult to control the depth of penetration into the anterior chamber during the puncture process. If the needle is inserted too deeply, it is easy to damage surrounding structures and cause anterior chamber hemorrhage or traumatic cataracts. If the needle is inserted too shallowly, it is difficult to collect aqueous humor and reduce intraocular pressure. Summary of the Invention

[0004] In view of this, in order to solve the above problems, the present invention aims to provide a quantitative aqueous humor collection device capable of precisely controlling pressure, which comprises:

[0005] Liquid collecting assembly, control button, adjusting device, suction cylinder, piston assembly, and limiting device;

[0006] The limiting device is installed on the adjusting device;

[0007] The control button is slidably mounted on the adjustment device, and the control button can be rotated relative to the adjustment device to a locking position or a starting position;

[0008] The piston assembly passes through the limiting device and the adjusting device and is fixedly installed on the control button;

[0009] The outer wall of the suction cylinder is provided with a plurality of scale lines, the suction cylinder is fixed to the adjustment device, and the suction cylinder is sleeved on the outside of the limiting device and the piston assembly;

[0010] The liquid collecting component is installed at one end of the suction cylinder away from the regulating device, and the liquid collecting component is communicated with the suction cylinder.

[0011] The above-mentioned aqueous humor quantitative collection device with precise pressure control, wherein the adjustment device includes: an adjustment rod head, an adjustment rod core, and an adjustment button; the outer wall array of the adjustment rod head is provided with a plurality of first splines, and a guide groove is formed between every two first splines, and the interior of the adjustment rod head is provided with a first mounting hole, and the bottom of the first mounting hole is provided with a second mounting hole, one end of the adjustment rod core is provided with a shaft shoulder, the adjustment rod core extends into the second mounting hole, and one end of the adjustment rod core is fixed to the first mounting hole through the shaft shoulder, so that an annular groove is formed between the outer wall of the adjustment rod core and the inner wall of the first mounting hole, and the end of the adjustment button is installed at the end of the first mounting hole, so that a gap is left between the adjustment button and the plurality of first splines, and the outer wall of the adjustment button is provided with a fixed scale line.

[0012] In the above-mentioned aqueous humor quantitative collection device capable of precisely controlling pressure, a plurality of second splines are provided in an array on the inner wall of the adjusting rod core.

[0013] The above-mentioned aqueous humor quantitative collection device with precise pressure control, wherein the limiting device includes: a nut, a screw, and a limiting piston; the outer wall of the screw is provided with a plurality of first grooves, one end of the screw passes through the nut and is installed on the adjusting rod core, and the first groove cooperates with the second spline, and the limiting piston is installed on the other end of the screw.

[0014] The above-mentioned aqueous humor quantitative collection device with precise pressure control, wherein the piston assembly includes: a piston rod and a piston; one end of the piston rod passes through the limit piston, the screw, the adjusting rod core in sequence and is fixedly installed with the control button, and the other end of the piston rod is installed on the piston.

[0015] In the above-mentioned aqueous humor quantitative collection device capable of precisely controlling pressure, a plurality of third splines are provided in an array on the outer wall of the nut.

[0016] The above-mentioned aqueous humor quantitative collection device with precise pressure control, wherein the inner wall of the suction cylinder is in contact with the limit piston and the piston, and one end of the suction cylinder is installed in the annular groove through a flange, and the interior of the suction cylinder is provided with a second groove that cooperates with the third spline.

[0017] The above-mentioned aqueous humor quantitative collection device with precise pressure control, wherein the inner wall of the control button is provided with a plurality of blocks slidably arranged in the plurality of guide grooves, and the outer wall of the control button is provided with a starting scale line and a locking scale line. The control button rotates relative to the gap through the block so that the starting scale line is aligned with the fixed scale line and is located in the starting working position, or the locking scale line is aligned with the fixed scale line and is located in the locking working position.

[0018] The above-mentioned aqueous humor quantitative collection device with precise pressure control, wherein the liquid collection component includes: a liquid collection tube and a needle, one end of the liquid collection tube is installed on the suction cylinder, and the other end of the liquid collection tube is installed with the needle.

[0019] A method for using a device for quantitatively collecting aqueous humor with precise pressure control, comprising the device for quantitatively collecting aqueous humor with precise pressure control,

[0020] Step 1: rotating the control knob to the locking position, and then rotating the adjustment device to move the limit device to a certain scale line on the suction cylinder;

[0021] Step 2: Slide the control button relative to the adjustment device, so that the control button drives the piston assembly to move, and a negative pressure chamber is formed between the limit device and the piston assembly;

[0022] Step 3: Rotate the control knob to the start position;

[0023] Step 4: Puncture the puncture site using the liquid collection component;

[0024] Step 5: Rotate the control knob to the locked working position. Due to the negative pressure, the piston assembly moves toward the limit device and begins to pump liquid. At this time, the control knob simultaneously moves away from the adjustment device through the relative guide groove of the block until the piston assembly contacts the limit device, and the quantitative pumping is completed.

[0025] Step 6: withdraw the liquid collection component from the puncture site and remove it from the suction cylinder;

[0026] Step 7: Rotate the adjusting device so that the limiting device drives the piston assembly to move to one end of the suction cylinder where the liquid collecting assembly is installed. The piston assembly drives the control button to slide on the adjusting device, and then rotate the control button to the start working position.

[0027] Compared with the prior art, the above technical solution has the following positive effects:

[0028] The present invention provides a precise pressure-controlled aqueous humor quantitative sampling device. This device effectively avoids intraoperative secondary injuries caused by eye movement during surgery, while also preventing loss of intraocular fluid sample volume when collected with a syringe. It also precisely controls the volume of sampled intraocular fluid and the reduced intraocular pressure level. The operation is convenient and quick, significantly alleviating patient pain. Furthermore, the device is reusable, making it easier for clinicians to operate, reducing the use of clinical consumables, and ensuring safety and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Schematic diagram of a quantitative aqueous humor collection device capable of precisely controlling pressure according to the present invention.

[0030] Figure 2 This is an exploded view of a device for quantitatively collecting aqueous humor with precise pressure control according to the present invention.

[0031] Figure 3 Schematic diagram of adjusting the club head in the present invention.

[0032] Figure 4 Schematic diagram of the adjusting rod core in the present invention.

[0033] Figure 5 Schematic diagram of the piston assembly of the present invention.

[0034] Figure 6 Schematic diagram of the initial state of a device for quantitatively collecting aqueous humor with precise pressure control according to the present invention.

[0035] Figure 7 This is a schematic diagram of the quantitative adjustment of an aqueous humor quantitative collection device capable of precisely controlling pressure according to the present invention.

[0036] Figure 8 Schematic diagram of the negative pressure chamber formed by the forward-pushing piston in the present invention.

[0037] Figure 9 Schematic diagram of the locking piston in the present invention.

[0038] Figure 10 This is a schematic diagram of the puncture operation performed in the present invention.

[0039] Figure 11 It is a schematic diagram of the start of liquid extraction in the present invention.

[0040] Figure 12 It is a schematic diagram of the completion of liquid extraction in the present invention.

[0041] 1. Limiting device; 11. Nut; 111. Third spline; 12. Screw; 121. First groove; 13. Limiting piston; 2. Adjusting device; 21. Adjusting rod head; 22. First spline; 23. Guide groove; 24. First mounting hole; 241. Second mounting hole; 25. Adjusting rod core; 251. Second spline; 252. Shoulder; 26. Annular groove; 27. Adjusting button; 28. Gap; 29. ​​Fixed scale line; 3. Control button; 31. Block; 4. Piston assembly; 41. Piston rod; 42. Piston; 5. Suction cylinder; 51. Flange; 52. Second groove; 6. Liquid collecting assembly; 61. Liquid collecting tube; 62. Needle; 7. Clamping nut. DETAILED DESCRIPTION

[0042] The present invention will be further described below with reference to the accompanying drawings and specific implementations, but is not intended to limit the present invention.

[0043] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them. They are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the efficacy and purpose of the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0044] like Figures 1 to 12 As shown, a preferred embodiment of a quantitative aqueous humor collection device with precise pressure control is shown, which includes: a liquid collection component 6, a control button 3, an adjustment device 2, a suction cylinder 5, a piston component 4, and a limit device 1.

[0045] The limiting device 1 is installed on the adjusting device 2; the control button 3 is slidably mounted on the adjusting device 2, and the control button 3 can be rotated relative to the adjusting device 2 to a locked working position or a start working position; the piston assembly 4 passes through the limiting device 1 and the adjusting device 2 and is fixedly installed on the control button 3; the outer wall of the suction cylinder 5 is provided with a plurality of scale lines, the suction cylinder 5 is fixed to the adjusting device 2, and the suction cylinder 5 is mounted on the outside of the limiting device 1 and the piston assembly 4; the liquid collecting assembly 6 is installed at the end of the suction cylinder 5 away from the adjusting device 2, and the liquid collecting assembly 6 is connected to the suction cylinder 5.

[0046] In actual use, the outer wall of the suction cylinder 5 is graduated from 0 to 0.3 ml. The maximum volume of the liquid collection assembly 6 is 0.3 ml. The inner diameter of the suction cylinder 5 is 5 mm, and the outer diameter is 6 mm. The outer diameter of the control button 3 is 17.2 mm. The total length of the suction cylinder 5 is 61.5 mm. The length of the needle 62 extending from the liquid collection tube 61 is 2 mm. The liquid collection tube is 41 mm long. Both the suction cylinder 5 and the liquid collection tube 61 are made of transparent material.

[0047] The present invention also has the following implementation modes based on the above:

[0048] Furthermore, a quantitative aqueous humor collection device with precise pressure control is provided, wherein the adjustment device 2 includes: an adjustment rod head 21, an adjustment rod core 25, and an adjustment button 27; the outer wall array of the adjustment rod head 21 is provided with a plurality of first splines 22, and a guide groove 23 is formed between every two splines 22, the interior of the adjustment rod head 21 is provided with a first mounting hole 24, and the bottom of the first mounting hole 24 is provided with a second mounting hole 241, one end of the adjustment rod core 25 is provided with a shoulder 252, the adjustment rod core 25 extends into the second mounting hole 241, and one end of the adjustment rod core 25 is fixed to the first mounting hole 24 through the shoulder 252, so that an annular groove 26 is formed between the outer wall of the adjustment rod core 25 and the inner wall of the first mounting hole 24, the end of the adjustment button 27 is installed at the end of the first mounting hole 24, so that a gap 28 is left between the adjustment button 27 and the plurality of first splines 22, and the outer wall of the adjustment button 27 is provided with a fixed scale line 29.

[0049] Furthermore, a quantitative aqueous humor collection device capable of precisely controlling pressure is provided, wherein the inner wall array of the regulating rod core 21 is provided with a plurality of second splines 251 .

[0050] Furthermore, a quantitative aqueous humor collection device with precise pressure control is provided, wherein the limiting device 1 includes: a nut 11, a screw 12, and a limiting piston 13; the outer wall of the screw 12 is provided with a plurality of first grooves 121, one end of the screw 12 passes through the nut 11 and is installed on the adjusting rod core 25, and the first groove 121 cooperates with the second spline 251, and the limiting piston 13 is installed on the other end of the screw 12.

[0051] Furthermore, a quantitative aqueous humor collection device capable of precisely controlling pressure is provided, wherein the piston assembly 4 comprises: a piston rod 41 and a piston 42; one end of the piston rod 41 passes through the limiting piston 13, the screw 12, the adjusting rod core 25 in sequence and is fixedly mounted to the control button 3, and the other end of the piston rod 41 is mounted on the piston 42. Specifically, the piston rod 41 is mounted on the control button 3 through a clamping nut 7. Furthermore, the end of the piston rod 41 mounted on the control button 3 has a reduced shoulder, and the outer wall of the shoulder is provided with a thread, so that the piston rod 41 can be mounted on the control button 3 through the clamping nut 7. In addition, the piston 42 and the limiting piston 13 of the device are both made of wear-resistant material, and are in close contact with the inner wall of the suction cylinder 5.

[0052] Furthermore, a device for quantitatively collecting aqueous humor with precise pressure control is provided, wherein the outer wall array of the nut 11 is provided with a plurality of third splines 111 .

[0053] Furthermore, a quantitative aqueous humor collection device with precise pressure control is provided, wherein the inner wall of the suction cylinder 5 is in contact with the limit piston 13 and the piston 42, and one end of the suction cylinder 5 is installed in the annular groove 26 through the flange 51, and the interior of the suction cylinder 5 is provided with a second groove 52 that cooperates with the third spline 111.

[0054] Furthermore, a quantitative aqueous humor collection device with precise pressure control is provided, wherein the inner wall of the control button 3 is provided with a plurality of blocks 31 slidably arranged in a plurality of guide grooves 23, and the outer wall of the control button 3 is provided with a start scale line and a lock scale line. The control button 3 rotates relative to the gap 28 through the block 31 so that the start scale line is aligned with the fixed scale line 29 and is located in the start working position, or the lock scale line is aligned with the fixed scale line 29 and is located in the lock working position.

[0055] Furthermore, a device for quantitatively collecting aqueous humor with precise pressure control is provided, wherein the liquid collection assembly 6 includes a liquid collection tube 61 and a needle 62. One end of the liquid collection tube 61 is mounted on the suction cylinder 5, and the other end of the liquid collection tube 61 is mounted with the needle 62. Specifically, the end of the suction cylinder 5 where the liquid collection tube 61 is mounted has a smaller diameter, allowing the suction cylinder 5 to be inserted into the liquid collection tube 61, making the suction cylinder 5 and the liquid collection tube 61 more tightly mounted and easier to remove. Furthermore, the end of the liquid collection tube 61 where the needle 62 is mounted has a tapered surface, making it even easier to install the needle 62.

[0056] The installation process of this device is as follows:

[0057] Step 1: Install the adjusting device 2; press the adjusting rod core 25 into the second mounting hole 241 of the adjusting rod head 21 until the shaft shoulder 252 contacts the bottom of the groove of the first mounting hole 24;

[0058] Step 2: Install the limiting device 1; install the nut 11 and the limiting piston 13 on both ends of the screw 12 respectively, and rotate the nut 11 until the end surface of the nut 11 contacts the end surface of the limiting piston 13;

[0059] Step 3: Install the piston assembly 4: Install the piston 42 on one end of the piston rod 41, and sleeve the installed limit device 1 onto the piston rod 41 until the limit piston 13 contacts the piston 42. At this time, there is no axial gap between the piston 42, the limit piston 13 and the nut 7.

[0060] Step 4: Install the limiting device 1 and the piston assembly 4 in the suction cylinder 5. At this time, the third spline 111 on the nut 11 is installed on the second groove 52 on the suction cylinder 5;

[0061] Step 5: Align the adjusting rod core 25 in the adjusting device 2 with the first groove 121 on the screw rod 12 and push it in until the flange 51 is installed in the annular groove 26 and the flange 51 contacts the bottom of the first mounting hole 24;

[0062] Step 6: Push the adjusting button 27 from the end of the suction cylinder 5 away from the adjusting device 2 until the end surface of the adjusting button 27 contacts the end surface of the adjusting rod head 21 and fix it with screws;

[0063] Step 7: Rotate the adjusting knob 27 so that the limiting piston 13 drives the piston 42 to move to the end of the suction cylinder 5 where the liquid collecting pipe 61 is installed;

[0064] Step 8: Slide the control button 3 onto the adjusting rod core 25 until the block 31 is located in the gap 28. Turn the control button 3 so that the start scale line on is aligned with the fixed scale line 29. Finally, rotate the clamping nut 7 to install the piston rod 41 on the control button 3.

[0065] Step 9: Install the needle 62 on the liquid collecting tube 61, and then install the liquid collecting tube 61 on the suction cylinder 5, see Figure 6 shown.

[0066] A method for using a device for quantitatively collecting aqueous humor with precise pressure control, comprising the device for quantitatively collecting aqueous humor with precise pressure control,

[0067] Step 1: Rotate the control knob 3 to the locked working position, and then rotate the adjustment device 2 to move the limit device 1 to a certain scale line on the suction cylinder 5; specifically, to adjust the pumping volume, taking 0.2ml as an example, first rotate the control knob 3 to the locked scale line off, so that the locked scale line off is aligned with the fixed scale line 29 on the adjustment knob 27, and then rotate the adjustment knob 27 to move the limit piston 13 back to the position of the 0.2ml scale line on the suction cylinder 5. During the adjustment process, due to the negative pressure in the rear cavity of the piston 42, the piston 42 will move back closely together with the limit piston 13. At this time, the scale line 0.2ml is between the limit piston 13 and the piston 42, and the control knob 3 will also move back synchronously along the guide groove 23. Even at the maximum adjustment amount, it will not leave the guide groove 23 of the adjustment device 2. Please refer to Figure 7 shown.

[0068] Step 2: Slide the control button 3 relative to the adjustment device 2, and the control button 3 drives the piston assembly 4 to move, forming a negative pressure chamber between the limit device 1 and the piston assembly 4; Specifically, push the control button 3 forward relative to the adjustment rod head 21, thereby driving the piston 42 forward to the end of the suction cylinder 5 to form a negative pressure chamber, see Figure 8 shown.

[0069] Step 3: Rotate the control knob 3 to the start position; specifically, rotate the control knob 3 so that the start scale line on is aligned with the fixed scale line 29 of the adjustment knob 27. Figure 9 shown.

[0070] Step 4: Puncture the puncture site through the liquid collection component 6; specifically, puncture the puncture site through the needle 62, see Figure 10 shown.

[0071] Step 5: Rotate the control knob 3 to the locked working position. Due to the negative pressure, the piston assembly 4 moves toward the limit device 1 and the liquid is pumped. At this time, the control knob 3 also moves away from the regulating device 2 relative to the guide groove 23 through the block 31 until the piston assembly 4 contacts the limit device 1. The quantitative liquid pumping is completed. Specifically, rotate the control knob 3 so that the locking scale line "off" is aligned with the fixed scale line 29. Due to the negative pressure, the piston 42 automatically retreats and the liquid is pumped. Please refer to Figure 11 As shown, at the same time, the control button 3 moves backward along the guide groove 23 until the piston 42 contacts the limit piston 13, and the quantitative suction is completed. Figure 12 shown.

[0072] Step 6: Withdraw the liquid collection component 6 from the puncture site and remove it from the suction cylinder 5; specifically, withdraw the needle 62 from the puncture site, and then remove the liquid collection tube 61 from the suction cylinder 5. At this time, please refer to the status of this device. Figure 7 shown.

[0073] Step 7: Rotate the adjustment device 2 so that the limit device 1 drives the piston assembly 4 to the end of the suction cylinder 5 where the liquid collection assembly 6 is installed. The piston assembly 4 drives the control button 3 to slide on the adjustment device 2. Then rotate the control button 3 to the start position. Specifically, rotate the adjustment button 27 so that the limit piston 13 can drive the piston 42 to the end of the suction cylinder 5 where the liquid collection tube 61 is installed. At this time, the control button 3 moves in the guide groove 23 of the adjustment rod head 21 until the block 31 moves into the gap 28. Rotate the control button 3 so that the start scale line on is aligned with the fixed scale line 29. The control button 3 is in the start position.

[0074] The above description is only a preferred embodiment of the present invention and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for quantitatively collecting aqueous humor with precise pressure control, characterized in that: include: Liquid collecting assembly, control button, adjusting device, suction cylinder, piston assembly, and limiting device; The limiting device is installed on the adjusting device; The control button is slidably mounted on the adjustment device, and the control button can be rotated relative to the adjustment device to a locking position or a starting position; The piston assembly passes through the limiting device and the adjusting device and is fixedly installed on the control button; The outer wall of the suction cylinder is provided with a plurality of scale lines, the suction cylinder is fixed to the adjustment device, and the suction cylinder is sleeved on the outside of the limiting device and the piston assembly; The liquid collecting assembly is installed at one end of the suction cylinder away from the regulating device, and the liquid collecting assembly is communicated with the suction cylinder; The adjusting device comprises: an adjusting rod head, an adjusting rod core, and an adjusting button; a plurality of first splines are arranged in an array on the outer wall of the adjusting rod head, a guide groove is formed between every two of the first splines, a first mounting hole is provided inside the adjusting rod head, a second mounting hole is provided at the bottom of the first mounting hole, a shaft shoulder is provided at one end of the adjusting rod core, the adjusting rod core extends into the second mounting hole, and one end of the adjusting rod core is fixed to the first mounting hole through the shaft shoulder, so that an annular groove is formed between the outer wall of the adjusting rod core and the inner wall of the first mounting hole, the end of the adjusting button is installed at the end of the first mounting hole, so that a gap is left between the adjusting button and the plurality of first splines, and a fixed scale line is provided on the outer wall of the adjusting button; The inner wall array of the adjusting rod core is provided with a plurality of second splines; The limiting device includes: a nut, a screw, and a limiting piston; the outer wall of the screw is provided with a plurality of first grooves, one end of the screw passes through the nut and is mounted on the adjusting rod core, and the first groove cooperates with the second spline, and the other end of the screw is mounted on the limiting piston; The inner wall of the control button is provided with a plurality of blocks slidably arranged in the plurality of guide grooves, and the outer wall of the control button is provided with a start scale line and a lock scale line. The control button is rotated relative to the gap through the block so that the start scale line is aligned with the fixed scale line and is located in the start working position, or the lock scale line is aligned with the fixed scale line and is located in the lock working position.

2. The device for quantitatively collecting aqueous humor with precise pressure control according to claim 1, characterized in that: The piston assembly includes: a piston rod and a piston; one end of the piston rod passes through the limit piston, the screw rod, and the adjusting rod core in sequence and is fixedly installed with the control button, and the other end of the piston rod is installed on the piston.

3. The device for quantitatively collecting aqueous humor with precise pressure control according to claim 2, characterized in that: An array of third splines is provided on the outer wall of the nut.

4. The device for quantitatively collecting aqueous humor with precise pressure control according to claim 3, characterized in that: The inner wall of the suction cylinder is in contact with the limiting piston and the piston, and one end of the suction cylinder is mounted on the annular groove through a flange. A second groove matching the third spline is provided inside the suction cylinder.

5. The device for quantitatively collecting aqueous humor with precise pressure control according to claim 1, characterized in that: The liquid collecting assembly comprises: a liquid collecting tube and a needle. One end of the liquid collecting tube is mounted on the suction cylinder, and the other end of the liquid collecting tube is mounted on the needle.

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